bluuebunny/crossref_metadata_2025_split huggingface dataset:
The research on the current capability and insulating properties of 35 kV/1 kA CD HTS cable witness samples
Authors: Li Jichun , Zhang Liyong , Ye Xinyu , Xia Fangmin , Cao Yujun 
Published: August 2019

Abstract
Due to the high capacity and low loss, high temperature superconducting (HTS) cable using Liquid N2 as the coolant has attracted the widespread attention in the field of the modern power technology. A 35 kV/1 kA cold dielectric (CD) high temperature superconducting (HTS) cable demonstration line, which is in the length of 100 m, has been established. To verify the design of the superconducting cable structure, the witness samples in the length of ∼1.0 m were fabricated to evaluate the current capability and insulating properties, such as lightning impulse voltage and alternating voltage tests. The results showed that the critical current (IC
) of the superconducting layer and superconducting shield layer was measured to be 1650 A and 3000 A respectively, and the voltage waveform of superconducting layer revealed no apparent increase during the testing process. Meanwhile, it could be also indicated from the results of high voltage tests that the insulating properties of HTS cable conform to the requirements of the standard GB/T3048.8-94.
Philosophy and Practice of Classification and Hierarchization of Power Distribution Network Planning and Design Standard System
Authors: Wang Yifei , He Yuqing , Xie Linjin , Sun Chongbo , Yuan Kai , Yang Lulu , Wu Kuihua 
Published: August 2019

Abstract
The integration of distributed power sources and other new-type equipment to power distribution network places higher requirements on the planning of power distribution network. Due to lack of scientific and reasonable classification and hierarchization methods, overlap or even contradiction among China’s existing power distribution network planning and design standards is becoming increasingly severe. Based on the principles of standard classification and the existing standard system, a classification and hierarchization method suitable for the power distribution network planning and design standard system is proposed in this paper. The power distribution net-work planning and design standards are classified into five classes. And then, after analysing the content attributes of standards at each level and the relation of inclusion among standards at different levels, two hierarchization methods including Content Evaluation Method and Comparative Analysis Method are proposed to determine the level of a standard. Finally, this paper illustrated the effectiveness of the two methods by examples. These research results provided theoretical guidance and reference for the effective management and efficient application of standards and the establishment of a modern power distribution network planning and design standards system.
Risk Assessment of Microgrid Based on Credibility Entropy Weight Coefficient Evaluation Model
Authors: Li Yongjie , Tang Hao , Guo Xinju , Li Lingyun 
Published: August 2019

Abstract
As a complex network, microgrid must have some weakness. Risk assessment of microgrid will help to find out these weakness so as to put forward the targeted improvement measures and provide strong support for the optimal operation of microgrid. According to the risk assessment of microgrid, this paper establishes a microgrid risk index system, which includes the first-level indexes and corresponding sub-indexes of structural safety, operation safety and technical safety, and innovatively establishes a credibility entropy weight coefficient evaluation model, and calculates the weight of each index layer and the comprehensive risk assessment score of the microgid. Furthermore, the risk assessment of a microgrid system is analyzed by quantitative calculation in order to make the assessment results more reliable and provide reference for further improving the risk assessment of the microgrid.
Failure Analysis and Suggestions of Composite Insulators
Authors: Zheng Jianjun , Xie Liming , Tan Xiaomeng , Fang Wenxuan , Qiao Xin 
Published: August 2019

Abstract
In this paper, the development of composite insulators at home and abroad was firstly introduced. Then several common failure forms and mechanisms of composite insulators were systematically expounded, which mainly included the failure of sheds and sheaths, brittle and decayed fracture of cores. In addition, the fracture of composite insulator cores had been the greatest threat to the safe operation of transmission lines. At last, to provide a reference for the operation and maintenance, some suggestions and measures for design, production and installation of composite insulators were put forward from practice.
Research on Optimal Distributed Power Supply Configuration under Air Pollution Prevention
Authors: Li Meng , Lin Yi , Lin Zhangsui , Wu Wei 
Published: August 2019

Abstract
Scientific planning and development of new energy resources has become the key to solve air pollution. How to optimize the allocation of distributed generation (DG) is the premise of effective development and utilization of distributed energy. In order to solve the problem of air pollution, this paper chooses the optimal allocation index of distributed generation, establishes the objective function and constraints, and optimizes the allocation of distributed generation. The results of numerical examples verify the validity of the proposed model and provide a reference for effectively solving the problem of air pollution.
Economic evaluation of 20,000 M3/Day seawater desalination coupling with floating reactor nuclear power plant
Authors: Li Junwen , Sun Haijun , Ye Xiaoli , Gao Shan , Yang Jifei 
Published: August 2019

Abstract
The coupling of floating nuclear reactor with different desalination processes was economically evaluated by using a desalination economic evaluation program (DEEP-5) software and a method of levelized annualized production water cost. Three desalination processes, namely, Multi-effect distillation (MED), multi-stage flash (MSF) or reverse osmosis (RO). The capacity of the plant was 20,000m3/day and its energy source was 100MWt nuclear power plant. The analysis indicated that water costs with the RO process have stronger economic competitive comparing to distillation processes, without regard to changes in water quality. The sensitivity analysis results showed that the sensitivity factors affecting the cost of desalinated water are, in order, discount rate, interest rate, Specific Construction Cost and Condensing temperature.
Abnormal vibration analysis and treatment for No. 3 bearing bush of ultra - supercritical 1000MW turbine
Authors: Li Wanjun , Li Xiaoxia , Zhang Deke , Niu Qingliang , Huang Tianqi 
Published: August 2019

Abstract
When a power plant ultra-supercritical 1000MW steam turbine generator set was started in a cold state, the vibration value of NO.3 bearing bush exceeded the alarm value. Based on the mechanism of vibration, the fault diagnosis and troubleshooting of excessive vibration of the NO.3 bearing bush were carried out by consulting the historical operation trend and checking the maintenance records, and the cause of the fault was accurately analyzed. By adopting effective measures such as setting up the heating system of the middle pressure cylinder and setting up the starting steam parameters reasonably, the problem of excessive vibration value of the NO.3 bearing bush was completely solved and the hidden danger of equipment operation safety was eliminated.
Study on the warm-recycled mechanism of SMA and the road performance
Authors: Fan Qian , Wu Chuanhai , Xu Xinquan 
Published: August 2019

Abstract
In order to evaluate the performance of warm-recycled asphalt mixture with SMA, based on analyzing the characteristics of gradation, aggregate and aging asphalt with reclaimed asphalt pavement (RAP), The regeneration methods of high grade soft asphalt mixed at low temperature and hard natural asphalt remixed with modification to enhance are proposed, and it was used to prepare recycled asphalt mixture with SMA and different RAP contents(0, 10%, 20%, 30%). And its high temperature performance, water stability, low temperature performance and fatigue performance were comprehensively evaluated. The result showed that soft and rock compound regeneration technology is feasibility, the natural asphalt with strong polar functional groups was modified and strengthened by remixing to improve the comprehensive performance of asphalt; the performance of warm mix recycled mixture with the 7:3 ratio of 110 # asphalt matrix and TLA lake asphalt is better; the best dosage of RAP is 20%; compared with HMA and SBS modified asphalt mixture, temperature can reduce 15°C and 30°C to 35°C respectively.
Vibration Analysis of GIS Pipe System in Transformer Substation
Authors: Zhang Huakai , Jian Youwei , Guo Qijun , Deng Hualing , Jian Mingjian , Zhang Guangcheng , Du Baoshuai 
Published: August 2019

Abstract
Due to the influence of electromagnetic force, the running GIS gas (insulated switchgear) will produce a certain vibration frequency. The other factors, such as resonance, disturbance of internal gas, bring abnormal vibration to the GIS shell. Because of the bad effects followed, the components of GIS can be damaged to the leakage which will lead to power failure in serious cases. In this paper, the vibration analysis of a 1000kV UHV substation 500kV area GIS is carried out. The vibration frequency of the GIS equipment was obtained by field vibration detection, and through the finite element modal analysis, we got the natural frequency and modal shape. It was found that the vibration frequency of the GIS shell is normal reportedly, and the possibility of resonance is ruled out.
Research and Application of Smart Substation Protection Based on Visual Remote Sensing Image Processing
Authors: Ni Chengxiang , Zhu Changdong , Guan Xibing , Yang Bin , Xian Wanchun , Hua Jing , Xie Meng , Jin Huawei 
Published: August 2019

Abstract
Under the background of the rapid development of Smart Substation in the new era, the relay protection device plays an important role in the operation of Smart Substation, which has great guarantee for the safety and stability of the power system. However, in the current situation, the relay protection equipment or the failure of the line is very common, which will not only hinder the operation of other systems, but also greatly increase the economic loss caused by system failure. With the continuous development of visual remote sensing image processing, the visualization technology is introduced into the design of remote sensing image processing system and applied in the protection system of Smart Substation. The visualized remote sensing image processing system technology can improve the efficiency of relay protection of Smart Substation. It can be seen that the application of this technology in Smart Substation has obvious superiority. Therefore, the research and improvement of the relay protection scheme for the relay protection of the new generation of Smart Substation is particularly important, which is convenient for the safe operation of the power system.
Research Status and Development Trend of Solar Heating Technology
Authors: Meng Xin , Feng Rong , Yang Yongping 
Published: August 2019

Abstract
As one of the renewable green energy sources, solar energy has great advantages in energy conservation and environmental protection. With the deepening of the research on solar heating technology, more issues have been discussed. This paper summarizes the research status of solar heating technology from two aspects of solar energy heat collection and heating implementation. Firstly, heat collection technology is still the key to solar energy heat utilization, which focuses on the numerical simulation of heat collector and the influence of heat collection structure on heat collection capacity. Secondly, thermodynamic analysis of heat transfer enhancement of ventilation gap and air flow in passive solar heating system is a hot topic; some scholars even put forward new heat transfer theoretical models and improved equations. Whereas in the active solar heating system, due to the imbalance and instability of solar energy, most of the research focuses on the construction of multiple complementary heating system and the corresponding optimal operation mechanism as well as the study of solar energy heat storage materials, devices and their heat storage performance. Thirdly, in view of the actual building environment in rural areas of northern China, it is proposed that using distributed solar energy collection method combined with heat storage technology and using green energy internet to distribute heat energy is the research trend of maximizing the application of solar heating in the region.
Statistical Analysis of the Structure of Total Petroleum Consumption in China
Authors: Wang Zhe 
Published: August 2019

Abstract
The essay firstly analyzes the present condition and the structure of the total petroleum consumption in China. Then, the method of qualitative analysis will be applied to conduct research on main essences that affects the total petroleum consumption in China to select ten indexes from acquired relevant statistics and lay out a comprehensive constitution of the total petroleum consumption in China. Subsequently, constructs a multivariate linear regression model for these ten indexes by means of quantitative analysis, and utilizes the spss software to conduct research on these influential essences. Last but not the least, the future situation of China’s petroleum energy consumption will be forecasted and relevant countermeasures and suggestions will be put forward based on outcomes of empirical analysis.
Measurement and Spatial Evolution of Regional Energy Efficiency in China
Authors: Cheng Ting , Bai Yujuan 
Published: August 2019

Abstract
Energy is an important factor of production to ensure sustainable development of country. There are obvious regional differences in energy efficiency in China at the present stage. In this context, this paper studies the provincial energy efficiency in China. Under the framework of total factor energy efficiency analysis, the total factor energy efficiency of 30 provinces (cities and autonomous regions) in China from 2007 to 2016 is measured by means of the global super-efficiency SBM-DEA model. Further, this article is based on the space perspective, with the aid of spatial econometric theory and methods, to the Chinese provincial total factor spatial correlation of the energy efficiency test, the results show that there are provincial total factor of energy efficiency in the space since the correlation of the regional difference of China’s total factor energy efficiency analysis and put forward the corresponding countermeasures.
Analysis and Research on the Power Generation Numerical Model of River Dynamics and Fluid Dynamics
Authors: Ping Anan 
Published: August 2019

Abstract
With the development of economy and the improvement of human living standards, the demand for energy will only continue to grow. As one of the main renewable energy sources, River energy has made great progress. The equipment of river kinetic energy generation is different from that of conventional large and medium-sized high dam hydropower stations because of the different energy conversion modes. If the technology and equipment of Gaoba Hydropower Station are mature, the river kinetic power station system and its series technology and equipment are still in the primary stage of development. Different water flow generation methods use different platform positioning systems. In order to collect unstable water flow energy, the water flow power generation device is required to convert the mechanical energy in the water flow energy into electricity that can be used by two-stage energy conversion. Based on the fluid mechanics analysis, this paper determines the factors related to the energy conversion efficiency of the primary conversion device and the relationship between the influencing factors. I hope that I can make some contribution to the development of renewable energy.
Modeling and Control of Peak Current Mode Non-ideal Buck Converter
Authors: Xu Huifang , Liu Yiqiang , Wang Zhonghao 
Published: August 2019

Abstract
Based on the energy conservation method and the average modeling method of switching elements, considering the non-ideal parameters of the actual circuit, the whole peak current mode control non-ideal Buck converter system model is established. On this basis, for the equivalent power level, there are still some problems such as slow response speed and poor stability. A voltage controller compensation method is proposed and a system model including voltage controller compensation network is established. Through the analysis of the model and the simulation in Matlab, it can be seen that the model is intuitive and clear in physical meaning, which can more accurately reflect the working condition of the actual circuit. The designed voltage controller can improve the performance of the converter and can be DC-DC. The design of the converter system control circuit provides a theoretical basis.
Comparative Analysis Before and After Optimization of URL Detection Program
Authors: Yan Yi , Zhan Lichao , Zhong Susheng , Lin Xijun , Mai Xiaohui , Zhou Kaidong 
Published: August 2019

Abstract
Perform URL detection on the three major systems of the power grid, and obtain the program for the detection results. The whole process of the project has gone through two stages, namely the original program construction and the optimized program construction. The original program was built in a cluster with 918 menus and 36 ips and ports. Since there is not a proper number of threads, a large number of URLs are waiting in serial during URL detection; the final data is exported to excel, resulting in The detection of the cluster resources is wasted, the total length of the probe is about 35 minutes; the optimized program adds enough threads, and the data is exported to the excel mode, the data is exported to the log file through the log framework, and finally A total of 2 minutes, the efficiency increased by 1650%.
Evaluation of the Implementation Effect of Power Demand Response under the Background of the New Power Reform and Electricity
Authors: Sun Liping , Wang Lifang , An Qian , Pan Mingming , Tian Shiming , Wu Lei 
Published: August 2019

Abstract
In recent years, more and more regions have carried out demand response projects. It is urgent to construct an evaluation indicator system and comprehensive evaluation model to evaluate the implementation effect of power demand response under the background of the new power reform and electricity. This paper uses literature research, expert consultation and frequency statistical methods to construct an evaluation indicator system for power demand response implementation in the context of demand response new power reform and electricity; and combine the TOPSIS method with the grey correlation evaluation to construct a grey relational ideal point combination analysis and evaluation model; finally, the theory is applied to practice, to Beijing, Shanghai, Jiangsu and Foshan. The case study of the city is an example to verify the effectiveness of the evaluation model.
Changes of chlorophyll value and plant height in leaves of different soil materials
Authors: Shi Lei 
Published: August 2019

Abstract
The chlorophyll content in leaves can reflect the photosynthetic function of plant leaves. In this study, the chlorophyll content of Arctium lappa L. with different material profiles was monitored by chlorophyll analyzer. The overall trend of chlorophyll was from low to high. After a peak, the chlorophyll content gradually decreased and then tended to be flat. This indicated that Arctium lappa L. grew from early stage of development to maturity and then to decline. The results showed that the SPAD value of chlorophyll in shale + clay and perlite + clay potted plants remained between 8 and 25 from the beginning to maturity. The fluctuation of chlorophyll value was small in the first 20 weeks of monitoring, and increased rapidly in the following 4 weeks. Vegetable carbon and clay fluctuated obviously in the 9th week, and the chlorophyll content was stable and high in the 13th to 16th week. During the whole monitoring period, the content of chlorophyll SPAD in the leaves of all plants did not fluctuate much in the first six weeks, and reached the highest average value in 13 to 16 weeks. The chlorophyll SPAD value of the potted plants reconstructed by the mixture of vegetable carbon and clay remained between 38 and 43, the chlorophyll SPAD value of the potted plants reconstructed by the mixture of vermiculite and clay remained between 20 and 25, and the potted plants reconstructed by the mixture of perlite and clay. The SPAD values of chlorophyll in shale and clay mixtures remained between 8 and 9, the SPAD values of chlorophyll in shale and clay mixtures remained between 9 and 10, and the SPAD values of chlorophyll in whole clay mixtures remained between 21 and 24.
Study on The Influence of The Application of Nano-Starch About the Paper Properties as Spray-Starch
Authors: Cui Wanting 
Published: August 2019

Abstract
In this thesis, we study the application of nano-starch in ordinary sizing starch was replaced by nano-starch as surface sizing in paper surface sizing, and its impact on paper properties was examined. It includes the study of Nano-starch, its influence on the performance of the sizing and on paper properties as sizing agents. The experimental data showed that the viscosity of the nano-starch solution was moderate. And the viscosity grown slow with the increase of concentration. JN and sodium dihydrogen phosphate both improved nano-starch solution viscosity. The effect of JN is more than sodium dihydrogen phosphate. When conventional surface sizing starch was replaced by Nano-starch, the physical properties of the paper, such as the tightness, burst index, breaking length, tear index, folding degree, sizing degree, have been greatly improved. And in comprehensive consideration, the best ratio between conventional surface sizing starch and Nano-starch was 6:2. The deposition properties of Nano- starch was good.
Preparation of Core-shell Magnetic Nanoparticles Carrier for Treatment of Emulsified Oil
Authors: Ding Yeli , Zhang Shaojun , Shi Jianqiang , Jiang Chunxiao 
Published: August 2019

Abstract
The Fe3O4 nanoparticles was prepared by chemical co-precipitation method, and modified with polyethylene glycol and lauryl sodium sulfate to obtain amphiphilic magnetic core. Core-shell magnetic particles (CMP) were prepared by modified dispersion polymerization method. After characterization, the contact angle θ of material was 133.4°, and the specific surface area of CMP reached to 1032.43 m2/g. The absorption rate up to 27.1007 g/g, and the oil release rate was up to 96.19%, ensure it fully adsorptive to the emulsified oily wastewater. The saturated magnetization of MPP was 3.95 emu/g, showed strong magnetic response. It is beneficial for recovery and reuse the material. After 12 hour degradation of crude oil, CMP immobilized with petroleum oil degrading strains to treat emulsified oil was 13.86% higher than that of free bacterial cells. The results of this research provide a reference for the rapid adsorption and degradation of emulsified oil wastewater by immobilized microorganisms with novel magnetic materials.