bluuebunny/crossref_metadata_2025 huggingface dataset:
Networked Intelligent Perception Technology and its Application in Smart Distribution Grid
Authors: Chen Xian Lai , Liu Jia , Guo Yong
Published: October 2014

Aiming at the new challenge of Internet of Tings (IOT) and Cyber-Physical System (CPS), the correlative technology and its application in information perception were introduced. Intelligent perception is a synthetic technology, and its core techniques are cyber physic device and remote control. The former concerns sensor technology, embedding technology and the host device’s intelligentize, and the later concerns the adaptable development of inter-networking technology, computer technology and communication technology. It is urgent to pay attention to the confluence of physical world and information world, catch hold of the chance, and research the networked intelligent solution for Smart Distribution Grid information perception.
Research and Application of Comprehensive Evaluation Index System in Micro-Grid’s Construction and Operation
Authors: Wu Shan Shan , Wang Peng , Li Yang , Hui Yu
Published: October 2014

In order to evaluation the operation of micro-grid comprehensively, this paper builds an index system based on our current definitions and technical characteristics of the micro-grid. There are 20 base evaluation indexes and uses analytic hierarchy process (AHP) to explain the index system from both technical and economic aspects. Through using the index system to some real region, it has been proved reliably that the index system could reflect the advantages and disadvantages of micro-grid operation intuitively. The proposed indexes have been included State Grid Company of micro-grid technical standards.
Research and Application of Integrated Standardization Theory in the Smart Grid Scheduling and Controlling System
Authors: Kun Zhao , Liu Tao , Tan Lin Tao , Zou Yu , Li Qiang , Li Li
Published: October 2014

Integrated standardization theory has been applied to work on integrated standardization for the Smart Grid Scheduling and Controlling System (SG-SCS), aiming to improve the overall quality and coordination of technical standards for dispatching and controlling in power system which help to solve practical problems. This Paper presents the definition and history of integrated standardization, and introduces the method to develop integrated standardized work for the SG-SCS which contains 4 phases: preparation phase, planning phase, standard setting or revising phase and organizing and implementing phase. The objects for integrated standardization is analyzed and determined, while the objective is addressed as well. Analysis elements related to the SG-SCS systematically and ascertain the scope of those, for target decomposition of integrated standardization. Make the complex of standards plan based on former results and determine what standards we shall set or revising. Create a detailed work plan and execute it to form a coordinated complex of technical standards. Organize the implementation of standards, with a close-looped feedback work mechanics, the overall quality and reliability of standards for SG-SCS can be ensured. By carrying out the SG-SCS integrated standardization, problems such as partly duplication or Contradiction between old standards, the overall quality of standards is promoted, which helps to the operation and control of electrical power system.
Design and Application of a Medium/Low-Power Stand-Alone/Grid-Connected Dual-Mode Inverter for Solar Photovoltaic System
Authors: Wang Yi Wang , Zhang Bo , Kai Cao , Shuai Zhang
Published: October 2014

The application of solar photovoltaic poer genernation usually has stand-alone and grid-connected modes,but most of the existing solar photovoltaic inverter has only a single function of off-grid or grid-connected,the suitability of system is relatively poor, difficult to meet the needs of the particular application. A medium and low-power stand-alone/grid-connected dual-mode inverter for solar photovoltaic system was designed,the composition, working principle and implementation of the inverter were introduced and developed.The designed inverter with a variety of functions,which can meet stand-alone or grid-connected and other solar photovoltaic applications, and can be used in different solar occasions.
Research on AC-DC Power Flow to Solve the Instability of Micro-Grid
Authors: Xu Xing , Chen Hui Ting , Feng Lei
Published: October 2014

Nowadays the disadvantages of large power grids are becoming more and more conspicous. Scholars have come to realize the importance of micro-grids. As the supplement of large power grids, the instability of micro-grids has gathered a huge amount of attention. This paper proposes a solution of the instability problem of micro-grids based on the research on AC-DC power flow. The main idea is to add AC power flow and storage power, which features stable voltage, stable current and stable output, in the micro-grids, thus solving voltage and current fluctuation and other instability problems in micro-grids.
Short Term Load Forecasting Based on Fuzzy Clustering
Authors: Wang Yi Jun , Lu Cheng , Li Dian Wen
Published: October 2014

This paper presents selected similar days of short-term power load forecasting model based on fuzzy clustering, the method first meteorological factors subdivided into temperature, barometric pressure, wind speed, rain, etc., and then type the week, date, type of day together constitute similar factors, fuzzy coefficient feature mapping table through fuzzy rules, not only to achieve quantitative impact factors and facilitate real-time to add a new rule. On this basis, the use of fuzzy clustering method for classification, based on the level of clustering similar day is selected to reduce the number of samples to accelerate the selected speed. The model takes into account the full impact of weather and other factors on load forecasting, further weakening the load of randomness. Simulation results show that the method has higher prediction accuracy.
Application of Service Flow Technology Based on IEC 61970/61968 to Electric Power Information System
Authors: Zhang Shi Dong , Shao Zhi Min , Li Li Sheng
Published: October 2014

This paper presents the service flow technology based on IEC 61970/61968, and expounds the definition of the service flow and matching method. Service flow technology can support the SOA framework to meet the increasing demand of fusion to electric power information system. An actual service flow case is applied in power information system, the results show that this technology can make better use of IEC 61970/61968 interface, which provide technical methods for the interaction and expansion between information systems.
Flow Boiling Enhancement by the Surface Quenched in Nanofluid
Authors: Cui Wen Bin , Zhang Zhi Quan , Song Chang Jian , Su Feng Min , Ma Hong Bin
Published: October 2014

A quenched surface was applied in flow boiling, which is fabricated by quenching a piece of copper in carbon nanotube (CNT) fluid.Its performance was compared with bare copper, and the results showed that the quenched surface can enhance the heat flux by 15–20%. Quenched surface was less effective in enhancing heat flux as the flow rate and liquid subcooling was increased.
Numerical Simulation on Effects of Variable Specific Heat Ratio on Floating Ejector Nozzle
Authors: Zhou Gao Liang , Wang Qiang , Hu Hai Yang
Published: October 2014

The codes for ejector nozzle with floating external adjustment sheet were specially developed, the flow field was numerically simulated by using parametric modeling method and grid partitioning technique. Turbulence model was selected according to predictions of explicit algebraic Reynolds stress, specific heat ratio (γ) was based on local temperature and gas compositions. The formulas of ideal nozzle parameters were derived using varied γ, which were used to analyze nozzle aerodynamic performance. The results obtained from constant and variable γ were compared. The results show that: nozzle mass flow rate is reduced because of more difficulty in airflow expansion, while nozzle thrust has a tiny change in variable γ cases. Moreover, the high temperature region of inner nozzle is larger and injected cold air is less despite of a smaller balanced floating sheet angle, which are detrimental to thermal protection.
Overview on the Determination Method of Viscosity Parameter of Organic Heat Carrier
Authors: Kou Guang Xiao , Li Lin
Published: October 2014

As one of the important quality indicators of organic heat carrier, the determination method of Viscosity Parameter has been greatly developed in recent years. In this paper, the traditional and new measurement methods have been summarized and introduced. Then it analyzed the current status and the existing problems of the measurement methods of Viscosity Parameter in our country, and it also prospected the development of the measurement methods of Viscosity Parameter of organic heat carrier. The new measurement method in recent years can be expected to viscosity measurement methods in the field of organic heat carrier along the following direction of development: (1)The traditional measurement methods will be further development and application; (2)The optical measurement techniques will be the most promising method for real-time measurement of viscosity in the organic heat carrier; (3) By using the method of modern data acquisition and processing to improve the traditional organic heat carrier viscosity measurement technology.
Active Predictive Control of Turbine Tip Clearance for Aero-Engine
Authors: Peng Kai , Fan Ding , Wu Ran Ran , Teng Yu Qiang
Published: October 2014

Active control of turbine blade tip clearance continues to be a concern in design and control of gas turbines. Ever increasing demands for improved efficiency and higher operating temperatures require more stringent tolerances on turbine tip clearance. In this paper, a turbine tip clearance control apparatus and a model of turbine tip clearance are proposed. The active clearance control (ACC) of aero-engine turbine tip clearance is evaluated in a lapse-rate take-off transient, along with the comparative and quantitative analysis. The results show that the resultant active tip clearance control system has favorable steady-state and dynamic performance and benefits of increased efficiency, reduced specific fuel consumption, and additional service life.
Harmonic Balance Analysis for the Oscillations of Magnetic Levitation
Authors: Wang Zu Yao
Published: October 2014

This paper investigates a design and analysis of a novel energy harvester that uses magnetic levitation to produce an oscillator with a tunable resonance. The governing equation of the system which could be derived based on the Newton’s second law is reduced to the form of a Duffing’s equation. The system steady-state amplitude frequency response relationship is analyzed by harmonic balance and numerical simulation, respectively. In the weakly nonlinear system, the curve of amplitude frequency response using harmonic balance method accords with the curve using numerical simulation;and in the strongly nonlinear system, the curve using harmonic balance basically accords with the curve using numerical simulation as well.
Study on the Effects of Oxygenated Fuels on Diesel Engine Performance
Authors: Wang Xu Dong , Xiong Chun Hua , An Gao Jun , Shang Hong Yan , Wang Feng , Wang Gang , Liu Feng Chun
Published: October 2014

The physicochemical characteristics of a new composite oxygenated fuel named oligomeric polyoxymethylene dimethyl ether and DMM10 (the blend of this fuel and conventional diesel oil with 10% in volume) were analyzed. The power performance, fuel economy, combustion characteristics and exhaust gas emission of a four strokes, direct injection, turbocharged and intercooled diesel engine fuelled with DMM10 and diesel fuel were analyzed and compared. The results show that in comparison to original diesel engine, when the engine fuelled with DMM10 blend fuel, the power performance remains unchanged; BSEC decrease slightly, smoke emission decreases obviously and its decrease rate is up to 72%.
Application of Siemens T3000 System Self Startup Control for Thermal Power Plant
Authors: Liang Zheng Yu , Xu Rui Feng , Li Yan Wei
Published: October 2014

A summary of Siemens T3000 system digital electro-hydraulic (DEH) self-startup control is proposed. On the foundation of analysis in turbine subgroup logic condition and step sequence, critical link and step sequence of turbine startup process is put forward, which is convenient for operator to master turbine startup characteristics quickly. Existing problems in DEH control logic are revealed and specific disposing measures are given. Application of the system in a 2×660 MW thermal power plant proves a secure and smooth operation of power units.
Study of Coupling Numerical Flow Field Simulation of Low-Pressure Last Stage Exhaust Passage in Steam Turbine
Authors: Song Zhen , Xu Jian Qun , Sun Li Peng , Liu Ming Tao
Published: October 2014

The model of coupled exhaust hood with condenser throat and the model of coupled exhaust hood, condenser throat with last stage were simulated based on the turbulence model Realizable k-ε. Calculated results show that due to the ignoring of the inlet swirl in the model coupled exhaust hood with condenser throat, the flow field is symmetrical and the pressure loss is small. Due to the influence of last stage, in the model of coupled exhaust hood, condenser throat with last stage, the flow field of the inlet of the exhaust hood is uneven, and the vortexes changed more complex, resulting in the increase of the pressure loss of each part and a greater influence in the diffuser pipe. The proportion of pressure loss of diffuser pipe in total pressure loss increases from 0.086 to 0.358, and there is a 70% decline of proportion of pressure loss in volute and condenser throat. In addition, the proportion of the pressure loss in volute is the largest one in these two coupled models. So more attention should be paid in the influence of the last stage, and weaken the vortexes in the volute when designing or optimizing the exhaust passage of steam turbine.
Experimental Research on Small-Scale Variable Flow Refrigeration System for Data Cabinets
Authors: Wang Yu , Wang Fang , Qu Yan , Wang Peng , Yang Ding Ding , Zhang Jia Wen
Published: October 2014

This paper presents a small-scale variable flow refrigeration system for data cabinets, taking server’s CPU cooling plate on heat dissipation effect of liquor evaporative cooling and variable flow control system, to analyze the possibility of implementation of variable flow cooling scheme. The experimental results showed that: variable flow cooling of server’s CPU cooling plate effect is obvious, CPU operating temperature is more stable, the temperature inside the cabinet is more evenly distributed. This method is not only conducive to heat dissipation of more than one server chassis, but also in small-scale data cabinets. With workstation consumption analysis, the relative energy consumption of air-conditioned room reduced a lot.
CFD Simulation of Capillary Network Radiation Heating Comfort
Authors: Bin Sun , Zhang Jiu Ling
Published: October 2014

In order to study the effect on indoor thermal comfort when capillary network radiation heating is in diffrent locations, and make capillary network apply to civil construction in the best location. According to the Airpak software,we perform a bedroom thermal environment CFD simulation when capillary network is in three different locations, from which,we get the temperature field, the velocity field and the PMV images. Come to a conclusion,when the capillary network laying on the floor, the temperature distribution is most uniform, the human body comfort is best; when laying on the wall, the heat transfer performance is the best, and get a highest temperature;when laying on the ceiling, the temperature gradient in vertical direction is 0.37 °C /m,the temperature of upside is warmer than downside .
Intelligent Control of Heating Systems in Public Building
Authors: Wang Wen Biao , Mu Dong Dong , Wang Xu Dong , Wang Si Yuan
Published: October 2014

Abstract. Because of the characteristics of public buildings, waste exists in university building heating. The traditional time-sharing heating method is opening valve in heating time, and intermittently open valve in anti-freezing time. This heating strategy without considering the realistic weather factors leads to problematic application of heating. According to above situation, this thesis presents a method which intelligently change the watts of heating. Experiment shows that the new metod can intelligently switch on-off valve, and provide a safety and comfortable surroundings for residents. Moreover. Comparing with time-sharing control scheme more energy is saved.
Applied Research on Energy-Saving Technology of Buildings in Hot Summer and Cold Winter Regions of China
Authors: Li Jie , Wang Fang
Published: October 2014

Taking regions of hot summer and cold winter as the research object, this paper researched the characteristics of climatic resources and economic condition of the regions, summarized the active and passive adaptability of building energy-saving technology under local climate condition and economic condition, thus it provided reference and guidance for the future development of building energy-saving technology in hot summer and cold winter regions.
The Relationship between Architectural Materials and Human Settlements
Authors: He Li Xia , Zhang Qian , Jiao Tao
Published: October 2014

This paper expounds the relationship between architectural materials and human settlement and elaborates the importance of production, manufacturing, performance and quality of architectural materials in protecting the environment and improving human settlements proceeding from the impact of architectural material improvement on civil engineering projects and human settlements. In addition, this Paper expounds the development direction and importance of new architectural materials proceeding from resource and energy conservation, natural environment and ecological balance protection, sustainable development of civil engineering and human settlements improvement.
5MW Offshore Wind Turbine Control Based on Pitch Joint Torque Controller
Authors: Yao Xing Jia , Xie Hong Fang , Zhu Jiang Sheng , Wang Xiao Dong , Liu Ying Ming , Li Huai Qing
Published: October 2014

Modern control theory has been used to design a variable pitch controller based on disturbance accommodating. The controller realizes the optimal control which minimized the controller action and drive-train torque. A torque controller based on pole clustering had been designed to enhance drive system damping and to suppress torque ripple. The federated control of variable pitch and torque is adopted to reduce drive system dynamic torsional load, and has been verified by software MATLAB and FAST. Simulation result illustrated that drive system dynamic torsional load can be controlled to improve reliability of wind turbine and extend life of critical components by active control method.
CCHP System Operating Strategy Optimization Research in one of Shanghai Office Building
Authors: Zhao Lin Hui , Li Qi Fen , Ren Hong Bo , Song Li Fei , Zhao Xin , Zhao Jia Lin , Xu Jing Jing , Zhang Lei
Published: October 2014

The basic concepts and characteristics of CCHP system and the configuration scheme of the system are introduced in this paper. On this basis, in this paper, it uses the operating mode of the combination method of power decided by heat and heat decided by power, and establishes a linear programming model that makes total year’s costs as optimize targets. Using LINGO software, it has got the result of simulation and calculation with the architecture’s dynamic load, and has got the architecture’s annual hourly distributed data of cold, heat and electricity load, and got the best equipment configuration and operating strategy, and got to evaluate the optimize results of energy efficiency and economy.
Three-Point Flexural Normal Stress Analysis of Wood-Bamboo Sandwich Composite
Authors: Wu Xin Feng , Xu Jian Ying , Hao Jing Xin , Liao Rui , Zhong Zhu
Published: October 2014

In order to describe the bending property of sandwich beam with wood skin and binderless bamboo chips core, the effect of construction parameters and material type on bending normal stress and moment was analyzed systematically. It is shown that maximum bending normal stress of sandwich construction is bigger than homogeneous single layer beam with same cross section if the skin has higher modulus than the core. The bending moment can be taken almost by skin layer if the core modulus is much smaller than skin materials and core thickness should also be smaller to special point than total cross section. As for wood-bamboo sandwich composite, the core resistance to bending moment should be considered. The results can provide basic theory for design optimization of sandwich construction.
Research on Technology for Producing Green and Environmental - Friendly Silicate Glass
Authors: Tan Yu Qing , Tian Lei , Tan Hai Feng , Cao Sheng Xian
Published: October 2014

This article discussed the basic theory and routes for preparing soda-lime-silicate glass by filter mud in beet sugar refinery. The proportion of raw materials and processing conditions were optimized.The research shows that amber glass and green-white glass prepared can meet national standards and the technology was reliable, easy, high benefit both on economical and social effects and without secondary waste .
An Online Rolling Dispatch Optimization Strategy for the Access of Intermittent New Energy
Authors: Wang Jian Bo , Liu Wen Ying , Wang Wei Zhou , Liu Fu Chao , Jiang Xi Wei
Published: October 2014

For the volatility and intermittency of intermittent new energy like wind power, traditional dispatch model and technology are severely challenged. According to the characteristics that the prediction accuracy of wind power increases as time scale increases, this paper presents a multi-time scale active power dispatch model based on the traditional dispatch model, and proposes an active power dispatch hierarchical predicting control method on the base of model predictive control and multilevel hierarchical control during industrial control course. Finally, it gets the online rolling dispatch model and strategy for the access of intermittent energy.
Study on Performance Comparison of OLSR and AODV Routing Protocols
Authors: Cheng Yan Ming , Niu Jing , Sun Tie Jun
Published: October 2014

A Mobile Ad hoc network (MANET) is a network consisting of a set of wireless mobile nodes, in which nodes can communicate with each other without centralized control or established infrastructure. To obtain a better understanding of AODV (Ad hoc On-Demand Distance Vector Routing Protocol) and OLSR (Optimized Link State Routing Protocol) routing protocols, different performances are simulated and analyzed using OPNET modeler 14.5 with the various performance metrics, such as PDR (Packet Delivery Ratio), end-to-end delay and routing overhead. Only effect of mobility is analyzed in the paper. As a conclusion, in mobility case, routing overhead is not greatly affected by mobility speed in AODV and OLSR, and the PDR of OLSR is decreased as the node speed increased, while AODV is not changed. As to delay, AODV is always higher than OLSR in both static and mobility cases.
Based on the Human Eye Fatigue Detection System of Recognition and FPGA Technology
Authors: Wang Jun , Liu Qiang , Zhao Hang
Published: October 2014

This paper introduces the field programmable gate array (fpga) application in high-speed visual inspection system.ALTERA EP1K30QC208-2 are used in the system for system calculation and control of the core, to perform high-speed real-time visual detection algorithm, this paper adopts a yawning based on eye closure and to detect driver fatigue, the method of in YCr, Cb in the color space using gaussian model skin detection of human face area, in the face of a gray binarization figure using a priori knowledge of facial features geometry in rough positioning the human eye, eye contour are obtained by region growing and morphological operation and calculation of the closure of the eye;Best threshold detection lips when using lip color roughly locate the lips, on the basis of accurate positioning lips by face grey value characteristics, and then through the mouth level to determine whether a driver yawn;Based on the two characteristics of driving fatigue, experiments show that this system detection speed, excellent versatility, and can improve the detection accuracy.
Research on Caching Mechanism Based on User Community
Authors: Yan Li , Qu Yan Sheng
Published: October 2014

This paper produced a data caching system framework based on two-layer Chord. Caching is shared by users in domain and hot accessing information is shared by inter-domain users. It effectively reduces the caching system’s overhead. We also introduced cache replacement algorithm based on the user community, especially the user’s influence in the community and the information flow dynamics. The result of simulation and experiment of test-bed environment shows the caching scheme based on user community outperforms most existing distributed caching schemes.
Wireless Thermal Printer Based on Internet of Things
Authors: Yang Wen Min , Ge Run Zhou , Meng Peng Fei
Published: October 2014

This paper presents a GPRS thermal printer which is based on Internet of Things. The main control chip of the printer initializes the GPRS module, connects the restaurant reservation website servers and cell phones, and accepts orders from Internet and phone messages. Then the printer prints two same receipts. Meanwhile the information on the reservation is saved in SD card. After confirmation of orders, confirmation information would be sent back to relevant network ports or phones so that they can reaffirm each other. A GPRS wireless thermal printer which is based on Internet of Things can print the customers’ order timely and remind staff to handle them in time. It can be widely used in restaurant reservation website and other relevant service.
Investment Decisions Based on the Postponed Options PROT Hydropower Project
Authors: Shen Jun Xin , Guo Xiao Jun
Published: October 2014

The analysis and description of the current method used in hydropower project investment decisions and problems of the introduction of the Monte Carlo simulation method PROT hydropower project valuation. Examples of analysis results showed that: this method can better reflect the actual value of the uncertainty of hydropower projects, flexibility and projects to provide a reasonable basis for decision makers.
Study on the Opportunities and Challenges of Chinese Energy Investment in the Middle East
Authors: Huang Yi Ling
Published: October 2014

The Middle East is an energy rich region and an important strategic position. At present the Middle East has been undergoing a radical political and social transformation since the Middle East Upheaval, Great powers focus on this region. The Middle East economies are highly complementary to Chinese economy. As the rapid growth of energy demand power, Chinese energy investment in Middle East is growing. It is necessary for China to increase trade and investment in the Middle East, to promote economic integration and common prosperity. This paper will analyze the opportunities of Chinese energy investment in the Middle East from the view of the growth of Chinese global trade and investment, RMB internationalization strategy, the traditional friendship between China and the Middle East and so on. Meanwhile this paper will also study severe challenges of Chinese energy investment in the Middle East, such as religious conflict, the Iran nuclear issue, cultural difference, and try to provide countermeasures on basis of the analysis of multiple influence factors of construction the economic corridor in the world, in order to eliminate the barriers to energy investment, to strengthen the currency in circulation and to realize mutual benefit and win-win cooperation.
Device Risk Ranking Research Based on the Potential Life Loss
Authors: Yang Guo Liang , Hu Xin Sheng , Lu Chuan Jing
Published: October 2014

Base on the quantitative risk evaluation, the dangerous device risk is described by potential life loss. Potential life loss assessment and risk ranking of 71 hazards device in 8 factories of a petrochemical enterprise, shows that refinery and olefin plant risk, diesel hydrodewaxing unit and diesel hydrogenation unit risk is relative to the front in their respective categories’ risk ranking. The research results can be used to direct the relevant government departments or enterprises to prioritize hazard supervision and management, optimize the allocation of resources and improve the efficiency of management.
The Way of Allocating Short-Supplied Talents in Multi-Project Based on Queuing Theory
Authors: Chen Hong Yi , Li Cun Bin , Li Fei Juan
Published: October 2014

In recent years, construction enterprises’ poor economic performance and the drain of senior technical personnel have been two cause-and-effect problems, which seriously restrict the enterprises’ long-term development, and the existing researches contribute little to solve the problems for managers. Considering the uncertainties of talents resource demand resulting from the difference of Multi-project schedule, a cyclic queuing theory of fixed number of customers was introduced from the enterprise management level. Then the risk loss curve and waiting loss curve could be simulated according to historical data and management experience. Finally, a best method to allocate the shortage of technical talents came out. The model was built throughout the management processes, so it owned not only high theoretical basis but also high operability, and has a better reference on solving the two construction enterprises problems.
Study on the Mode of Talent Cultivating for Electrical Engineering and Automation Profession under the New Situation
Authors: Yang Shuo , Feng Dong Shi
Published: October 2014

In the report of Eighteenth CPC National Congress, new requirements are raised to universities and colleges, which is to promote the connotative development of higher education, To achieve this aim in stead of scale expansion, universities and colleges have to reform the traditional personnel training mode used previously. Therefore, the researchers are trying to explore a new talent cultivating mood in order to meet the need of social development for the professional talents in electrical engineering and automation major. The new mood is considered from seven perspectives: optimizoffing the curriculum system, designing the practice teaching, innovating the teaching methods, enforceing the credit system management, reforming the teaching evaluation system, establishing a scientific evaluation system and realizing the win-win situation of colleges and universities.
The Development of the Wind Power Industry in Western Jilin
Authors: Cui Hong Yan
Published: October 2014

Wind power is very important for low carbon energy strategy. Baicheng city has rich wind energy resources as the regional energy base of national key planning in western Jilin. This paper first analyzes the development situation of the wind power industry in Baicheng. Secondly the main problems of the wind power industry are analyzed, mainly including Lack of comprehensive planning for wind power development, high wind power capacity but low grid electricity, serious phenomenon of abandoning the wind power, lagging supporting power grid construction, and depression of the wind power industry. Finally, the corresponding countermeasures are put forward , including to unify thought and plan overall, to make policy of wind power development, to develop new ways to wind power used, to construct smart power grids and to promote the comprehensive development of wind power industry.
Dynamic Multi-Objective Power Dispatch Considering Load and Wind Power Variations in Wind Power Integrated System
Authors: Li Chen , Hu Zhi Jian
Published: October 2014

A modeling for dynamic multi-objective power dispatch considering load and wind power variations in wind power integrated system is presented. To deal with the random variables, probabilistic sequence theory is introduced and the operational space is extended. To solve the problem, an improved multi-objective teaching-learning-based optimization algorithm is proposed. Finally, the proposed model and algorithm are tested on a 10-units system including wind farm and the simulation results demonstrate that the proposed model and algorithm are feasible and effective.
Containing Small Hydropower and Wind Power System Optimal Spinning Reserve
Authors: Liu Zhi Jian , Liang Ning , Wang Dong Dong
Published: October 2014

When larger scale of small hydropower and wind power exist in power system, the traditional reserve capacity algorithm is no longer applicable at the same time of reducing the carbon emission. Aiming at the volatility and non-regulatory of small hydropower and wind power, considering the forecast error of small hydropower, wind power and load,the unit outage rate and other factors, combined with the actual operation parameters of one regional power system in Southwest of China, the wind-hydro – thermal power coordinated operation of multiple objective function optimization calculation model of reserve capacity is established. Using the weighted coefficient method of unified objective method, it transforms the multi-objective optimization problem into a single objective optimization one. Applying the exterior penalty function method, the constrained optimization problem is changed into a non-constrained optimization one. The improved particle swarm optimization algorithm is got by introducing the particle concentration cognition into traditional particle swarm optimization algorithm. The simulation results verify the validity of the model. To Compare them under different strategies, this method can get less fuel expenses of thermal power units in the case of lower loss of load probability (LOLP).With the small hydropower and wind power output size to optimize the spinning reserve capacity. The model and the algorithm are helpful for drawing up optimization strategies of the reserve capacity in those regions in which larger scale small hydropower and wind power exists.
Calculation on the Distribution of Ex-Core Neutron Flux during Reactor Start-Up
Authors: Liu Chun Yu , Elghazali Benbicha Mohamed
Published: October 2014

The distribution of neutron flux is simulated by MCNP code from reactor start-up to criticality when the control rods are drawn different length from reactor core on ex-core detector area of the WWER reactor of TianWan. Because physical model built is very large, in order to save calculation time, the moving process of control rod is simplified. The results of calculation show that The neutron mainly distributed in the range of 0-400cm outside the pressure vessel. The value of the relative neutron flux ex-core is maximum in the range of 110cm to 180cm, so detection effect is better when the detector is set in this region.
Fabrication of Titanium Doped Hollow Glass Microspheres for Inertial Confinement Fusion Targets by Dried Gel Method
Authors: Li Fang , Feng Jian Hong , Li Jing , Li Bo , Zhang Zhan Wen
Published: October 2014

Titanium doped hollow glass microspheres (HGMs) with atom ratio of Ti to Si (Ti/Si) from 2% to 20% were fabricated by dried gel method. Effects of titanium concentration on elements distribution and properties of gels and HGMs were investigated. Results show that elements in both gels and HGMs distribute uniformly when Ti/Si is no more than 5%. On the contrary, sodium chloride are separated out and acetic acid volatilizes from gels with a higher titanium concentration and the elements distribution becomes nonuniform. Furthermore, loss of sodium and acetate ion results in insufficient blowing and refining during the process of fabricating HGMs, and further leads to the decrease of quality on morphology, geometry and uniformity of spheres.
Studies on Geothermal Heating and its Related Issues
Authors: Zhang Yu Peng , Wang Shu Zhong , Lv Ming Ming , Jing Ze Feng , Luo Xiang Rong
Published: October 2014

There are various applications for geothermal energy. Geothermal heating is one form of great importance. The working principle is introduced. Then the origin and development are studied. Both the advantages and disadvantages are discussed, mainly compared with traditional radiator heating. Some related issues are studied too. All in all, there is a booming prospect in markets for geothermal heating.
The Monitoring Data Analysis of the Running Condition in Winter in Line with the Demonstration Project about Soil Source Heat Pump in Severe Cold Regions
Authors: Huang Kai Lin , Chen Mao , Liu Ye
Published: October 2014

In order to clarify the operation and performance of ground source heat pump in severe cold regions, the paper based on the demonstration project about ground source heat pump at Yifu teaching building of Jilin Jianzhu University, expounds the profile of the demonstration project and the data monitoring program of the system about ground source heat pump, shows monitoring data of the running condition in winter in line with the demonstration project and analyses the monitoring data briefly. The result shows that the heating effect of ground source heat pump system is favorable and ground source heat pump system is obviously environmental and energy saving.
The Balance of Power System Peak Load Regulation Considering the Participation of Nuclear Power Plant
Authors: Zhao Jie , Tang Yu Heng , Wang Li , Liu Di Chen
Published: October 2014

Nuclear power plants (NPP) have to face urgent requirement of participating in peak load regulation of power grid. The peak load regulation performances of NPP were researched. Based on the calculation and analysis on peak load regulation cost and benefit of NPP, the location, criterion and peak balance algorithm of NPP participating in peak regulation were proposed. Results of the actual research show that NPP possesses better ability of peak load regulation and the cost is lower, so NPP can participate in daily peak load regulation, which will improve both security and flexibility of power grid and enhance the efficiency of resource configuration. However, the depth and speed of peak load regulation by NPP are restricted by security and economy.
A Newly Energy-Saving Movable Piezoelectric Carpet
Authors: Wang Lian Yong , Liu Chao
Published: October 2014

The inventions is based on the principle of piezoelectric, using the changes of people walking in gravity driven linkage corresponding cutting magnetic lines to produce inductive current. It includes the two-way generation technology, and by parallel and assembly of generator, it finally realizes a newly energy-saving movable piezoelectric carpet. After analysis and calculation, when pressing one device, the power generation is about 75.843J. Taking a university for example, the average profits of a set of devices is up to 50000yuan. So it has high value both in economic and study.
Cost-Benefit Analysis Model of Single and Hybrid Energy Storage System in Active Distribution Network
Authors: Feng Yi , Shao Lei Jun , Zhang Bang Ling , Xie Jing Ying , Sun Bo , Liao Qiang Qiang , Zhou Guo Ding
Published: October 2014

The active distribution network is an effective approach to solve the problem such as the high penetration of intermittent renewable energy. This paper constructs single and hybrid energy storage battery systems in the active distribution network, calculates the economic benefits of the single and hybrid energy storage systems from six aspects in annual electricity sale revenue, ancillary revenue, investment cost, maintenance cost, landed cost and power shortage punishment cost. Take the lithium iron phosphate battery as single system, the lithium iron phosphate battery and Lithium titanate battery as the hybrid system to compute the cost benefit. The results show that the storage systems have effects to the intermittent renewable energy in peak shaving. Since the hybrid energy storage system can obtain more annual ancillary revenue, and the batteries’ work life is longer, it has more advantage in economic benefits than the single energy storage system.
Experimental Investigation on a Grid-Connected Photovoltaic Air Conditioning System
Authors: Jin Ting Xiang , Xu Xiao Feng
Published: October 2014

As coal, oil, natural gas and other non-renewable energy consumption and increasing energy demand, the utilization of solar energy as a new energy is greatly enhanced. In this work, a grid connected photovoltaic solar air conditioning system is designed, mainly comprised of solar panel, controller, inverter, room air conditioner and other parts. Air conditioning systems rely mainly on solar photovoltaic power; achieve the effect of energy conservation and environmental protection. The experimental result indicates that the system can achieve stable operation and the utilization of solar energy driving air conditioning system to save electricity. This air conditioning system is compared with the ordinary air conditioning system, SEER can increase 10.6 ~ 29.4%, HSPF can increase 6.25 ~ 18.5%.
Finite Element Analysis of the Magnetic Field Simulation of High Temperature Superconducting Magnet
Authors: Luo Ying Hong , Wang Jing Jing
Published: October 2014

Superconducting Magnetic Energy Storage (SMES) system use conductive coils made of superconductor wire to store energy, its application entirely depends on the design and development of superconducting magnet, as the magnetic storage element, during the operation of the superconducting magnet generates relatively strong magnetic field. In this paper, a 1MJ class single solenoidal SMES with Bi2223/Ag conductor is presented. On the basis of electromagnetic theory, subsequently infers mathematical model of magnetic field distribution by ANSYS finite element analysis software, modeling a two-dimensional electromagnetic analysis of 44 double pancakes to get the magnetic field distribution patterns. The results of the analysis provide a reference for the structural design, optimization of a superconducting magnet and shielding of stray magnetic field.
Amorphous Alloy Ni-Fe-B: Preparation, Characterization and its Catalytic Ability for Hydrogen Generation
Authors: Zhang Jun , Yao Hai Rui , Li Hua Bo , Bai Xiao Kang , Li Jing Jing
Published: October 2014

Several amorphous alloys (Ni-Fe-B) were synthesized using liquid phase reduction method. The influences of molar ratiosn(Fe)/n(Fe+Ni) and different temperatures on phase composition, morphology and catalytic activity were investigated. The resulting products were characterized by XRD and TEM methods, and the catalytic activities were also evaluated by way of hydrogen release ability of NaBH4hydrolysis. The results show that the products have stable amorphous phase structures. With the increase ofn(Fe)/n(Fe+Ni), the crystallizing tendency rises and the agglomeration strengthens. Under the conditions (T=333K,n(Fe)/n(Fe+Ni)=0.5), the as-prepared samples exhibit the highest catalytic activity, and the highest hydrogen generation rate is 1.70 mL/min-1.
Contrastive Study on Microwave Pyrolysis Products of Coal under N2 and Non-N2 Atmosphere
Authors: Yang Zhe , Zhou Jun , Zhang Qiu Li , Lan Xin Zhe , Zhao Xi Cheng
Published: October 2014

The microwave pyrolysis is a new research method for deeply processing of coal. This paper researched the microwave pyrolysis products of low rank coal under N2 and non-N2 atmosphere. The results showed that, compared with non-N2 atmosphere, the yield of liquid products increased by 4.65%, while the yield of solid bluecoke decreased by 2.95% under N2 atmosphere. The infrared characteristics absorption peak intensity of bluecoke obtained from N2 pyrolysis atmosphere was weaker; N2 contributed to the transformation of heavy oil into light oil.
How to Advance the Hydrogen Production Efficiency by Adding Rare Earths in the Process of Eelectrolysis of Water?
Authors: Kuang Ju Chi
Published: October 2014

Hydrogen is a kind of clean energy, and application is limited because the efficiency of hydrogen production was not high before. This work in the paper was to study how to advance the hydrogen production efficiency by adding rare earths in the process of electrolysis of water. The result of tests proved that the efficiency of hydrogen production of water electrolysis electrode is dramatically improved when a few of REs are added in plating bath, and La cations are more effective than Ce cations when being added in the plating bath. Besides that, this article illustrated positive impact of RE on process of plating as well as effect of RE on composition of the plating and corrosion resistance of surface of the coating. Furthermore, argumentation extended to it that RE alone and compound of La and Ce have affected on efficiency of hydrogen production by water electrolysis process. Finally the paper showed that a new mechanism had been presented in a new angle being established in effect of RE on electron state of Ni plating.
The Core System Design for New Kilowatt Aluminum-Air Battery
Authors: Zhou You Jie , Lu Chang Bo , Zheng Fa , Hu Zhi Jia , Wang Feng , Wang Gang , Liu Feng Chun
Published: October 2014

The author puts forward the core system design scheme of kilowatt aluminum-air battery on the basis of its chemistry characteristics and calculated function parameters of cell stack, and introduces the component functions, including control design, functional electrolyte circulation, air transport, DC / AC inverter system and other modules.
Effect of Electrical Aging on the Trap Parameter of HVAC XLPE Cable Insulation
Authors: Li Wei Wei , Shi Qiang , Wu Chi
Published: October 2014

The effect of electrical aging on the trap parameter of HVAC XLPE cable insulation was investigated in this work. Thermally Stimulated Current (TSC) was used to measure depolarization current. The variation of trap parameter was calculated by means of start-up method based on the Gaussian fitting curve of TSC data. It was found that, the activation energy and the amount of trap charge obtained from TSC peak at 243K and 348K were increased after electrical aging, which may be benefit to characterize the degree of aging. The amount of trap charge in the two peaks increases as the increase of oxide dipole after electrical aging. And charge trapped described by the TSC peak at melting temperature increased after aging. It is considered that the increase of charge in the TSC peak can be attributed to the release of trap charge in the melt crystallization process, which corresponds to the α relaxation process in XLPE insulation.
Experimental Study on Short-Circuit Withstand Capability of 110kV Power Transformer
Authors: Wei Chao , Wu Peng , Lu Yun Cai
Published: October 2014

Short-circuit withstand capability test of transformers is mechanical strength withstand test under strong current imposed on power transformers, which is a kind of assessment method of comprehensive technical capabilities and technological level of transformer manufacturing. This paper analyzes the theory basis of short-circuit withstand capability test and calculates the imposed short-circuit current value and provides experimental scheme which is verified by the testing. All is to verify the ability to withstand a short circuit of 110kV power transformer.
The Design of Cascade Switching Power Charger Based on PFC
Authors: Liu Ya Long , Liu Zheng , Li Kuang Cheng
Published: October 2014

Design a battery with a power factor correction two level converter structure of charging power supply .Discuss the design scheme of main circuit and control circuit. Expound the calculation method of the key element parameters. The experiments indicate that the device get a good performance on output and reliability. The source is appropriate for all types of Battery charging.