bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Variance Analysis and Friedman Check of Randomized Block Design for Motor additive
Authors: Gao Huameng , Yang Fan , Wang Hechao , Wang Wenxiu 
Published: March 2020

Abstract
In order to research the significancy level and difference in different motor assistant’s oil saving, the randomized block test design is introduced. The two stage cross-over design is explained. The two stage cross-over design was realized using SAS and the test data were gained. The test data was analyzed using variance analysis. The oil saving level and sample difference are gained. The study in this paper can be adopted in other fields of test design and data analysis.
Research on Spread Spectrum Multi-Target Diversity and Tracking Technology
Authors: Su Yonghe , Yuan Binwen , Zhang Di 
Published: March 2020

Abstract
In recent years, the survey ship has undertaken many key measurement and control tasks for multiple satellites. At present, single stations can only self-track a single target. In the mission, signals caused by factors such as occlusion or interference into the interference area are often encountered. Fluctuation, flashing, interruption, etc., so this paper proposes a method for tracking multi-target diversity into a tracking research method, which effectively responds to the influence of single target signal changes on tracking, and will be of great significance for multi-target spread spectrum measurement and control tasks.
Finite element Simulation of damped Sound Insulation Plate based on COMSOL
Authors: Chen Wei , Hu Sheng , Cao Hao , Huang Tao , Wu Xiaowen , Lu Ling , Peng Jiwen 
Published: March 2020

Abstract
In this paper, based on the acoustic impedance tube model established by COMSOL, we studied the influence of the boundary conditions on the frequency characteristics of the damping acoustic plate, the effect of the thickness of the damping layer on the single-layer and double-layer sandwich structure damping acoustic plate. Based on the simulation results, two conclusions can be obtained: (1) the damping layer can effectively increase the sound insulation of the sound insulation plate, and when the thickness of the damping layer is 2∼3 times of the bottom plate thickness, the performance-price ratio is the highest; (2) the sound insulation characteristics of the damping sound insulation plate follow the law of mass, and the sound insulation increases with the increase of frequency under the free boundary condition, while under the fixed support boundary condition, the low frequency sound insulation is larger.
Design of Polyethylene Ventilation Pipeline Leakage Monitoring System Based on Fusion of Multiple Signal Sources
Authors: Zhang Yingchun , Shi Jian 
Published: March 2020

Abstract
Due to the limitation of working conditions and working environment, polyethylene ventilation pipeline leakage monitoring system in an underground laboratory is facing the technical difficulties of low working pressure, large diameter and low leakage signal intensity. In order to prevent radon entering the fresh air system and ensure the safe operation of the fresh air system effectively, a monitoring method combining multi-signal sources, such as sound waves inside and outside the pipeline, is proposed in the design of PE ventilating pipeline leakage monitoring system, which can further improve the detection sensitivity, positioning error, reaction time and data management of the system.
Dynanic Simulation of Helical Gears with Crack Propagating In to Gear Body*
Authors: Jiang Hanjun , Liu Fuhao , Wang Manlin 
Published: March 2020

Abstract
The change of mesh stiffness induced by tooth crack will change the vibration characteristic of gear system. In this paper, an analytical model is proposed to investigate the helical gear mesh stiffness with tooth crack propagating into gear body. The developed model is validated by comparison with the FEA method. Hereafter, the mesh stiffness of helical gears with different crack depths is obtained and the effect of the crack depth on the mesh stiffness is studied. Afterwards, a 6 DOF helical gear dynamic model is established and the effects of crack depth on the dynamic response are investigated. The results indicated that the mesh stiffness of the helical gears reduced significantly with the present of tooth crack, the amplitude of periodical impulses increased as the crack depth increased, the rotate frequency and its harmonic frequencies are sensitive to the tooth crack.
The Role of Doubly-fed Motor with Low Voltage Ride Through by Controlling Converter in Wind Power Generation
Authors: Ni Mengxian 
Published: March 2020

Abstract
To improve the performance of the doubly-fed wind power converter system, according to the doubly-fed wind turbine system and its mathematical model, a vector control based on doubly-fed wind power converter control strategy and the rotor side stator flux linkage attenuation in the grid voltage drop of the doubly-fed wind power system are proposed. MATLAB/Simulink software is used to simulate different voltage sags and to compare and analyze the changes of stator flux and zero-sequence current between original control and stator flux attenuation control based on rotor side. It is found that when the grid voltage drops by 20%, the impact on the system is small, and when it falls to 80%, it would cause huge damage to the converter. And compared with the original control, the low voltage crossing control based on stator flux attenuation on the rotor side can restore the stable running state of the system more quickly. The results show that the stator flux decay control based on rotor side can make the doubly-fed wind machine transit the process quickly and reach a stable state, which lays a foundation for better control of power grid and reactive power support. The results of this study are intended to provide a basis for the control strategy of the converter in the doubly-fed wind power generation system and the stable operation of the system.
Performance Analysis and Optimization Research of Wind Power Forecasting System
Authors: Xing Xinyue 
Published: March 2020

Abstract
The power fluctuation of wind farm will affect the operation of regional power grid, mainly due to the power fluctuation caused by voltage fluctuation. In order to submit information to power dispatching department as soon as possible, it is convenient for system dispatching. It is necessary to research and develop wind power forecasting technology, especially ultra-short term wind power forecasting technology. At present, the power forecasting system of the dispatching side and some wind farms in China has been widely used. However, the system has some shortcomings in stable operation. Combined with the actual production experience of the existing wind power prediction system, analyze the performance of the existing wind power prediction system, find out the problems that affect the smooth operation of the system, and refer to domestic and foreign data to provide targeted information for each problem. Finally, some constructive optimization Suggestions and a set of optimization scheme are given. In addition, according to the final proposed solution, this paper also developed an optimization model for wind power prediction system, and compared the changes in system performance before and after optimization to verify whether the optimization plan is correct.
Research on the Calculation Method of Regional Grid Construction Efficiency and Power Demand under the Background of High Power Grid Complexity
Authors: Zhang Yan , Zuo Ya , Li Xiangping , Fan Pengfei , Fang Shaoxiong , Zhu Zelei 
Published: March 2020

Abstract
With the gradual development of power grid, the characteristics of power grid, such as regionalization, multi-dimensional and network complexity, have become more and more obvious. At the same time, the new round of power system reform has higher requirements for the development of power grid in all aspects. One of the key points of the reform is to achieve accurate investment in power grid, improve the efficiency of power grid construction and meet the demand of power grid construction. In this paper, the classic Analytic Hierarchy Process (AHP) is used, combined with the development situation of the power grid under the new requirements, the index system and model for the calculation of the construction efficiency and demand of the local and municipal power grid under the background of the highly complex development of the power grid are put forward. The model takes the time line of the power grid construction as the axis, through the pre-evaluation and post-evaluation of the power grid construction, the calculation of the construction situation of the regional power grid is completed. The efficiency and demand of power grid construction in different cities are analyzed. The example shows that the model can effectively identify the construction attributes of each region, reflect the construction requirements of the provincial power company system through different judgment matrix, and verify the final calculation results, optimize the construction and demand of the power grid system. The model effectively improves the operation efficiency of the power grid system, and realizes the ultimate goal of energy conservation and emission reduction.
Power Supply Reliability Assessment of Distribution Network Considering by Operation, Maintenance and Repair
Authors: Xu Lin , Teng Yufei , Chen Gang , Liu Chang , Yang Hua 
Published: March 2020

Abstract
In order to realize automation and intelligence of power system, it is essential to improve the power supply reliability assessment of distribution network. A comprehensive evaluation system for the reliability was proposed in the paper. An overall index system was integrated to introduce the criteria of the operation, maintenance and repair, which are important for the reliability. Entropy weight method and fuzzy TOPSIS method were combined to propose the evaluation model. Empirical analysis was implemented to verify the practicality of the evaluation system.
Review on the Wireless Power Transfer for the Application of Electric Vehicle
Authors: Gan Yanfen 
Published: March 2020

Abstract
Wireless power transfer (WPT) technique will become a hot development trend of the energy supply system for electric vehicles (EV). Compared with plug-in hybrid electrical charging systems, WPT has superior characteristics in small size battery, lightweight, short charging time (charging-in-motion services), and long driving range, etc. This paper mainly introduces the basic frame and the classification of the WPT system and then reviews the basic principles of popular WPT technique, named electromagnetic resonant coupling transfer (ERCT) brief. The basic components of the ERCT, coil, compensation topology, power electronics converters and control methods are given a brief introduction. The real-world applications are shown through examples that the WPT system is feasible, but also meet unsolved problems or difficulties. At last, some superficial improved is presented.
Redundancy Mechanism of Software System and Reliability Analysis
Authors: Yin Chunlin , Fang Zhengyun , Zhao Na 
Published: March 2020

Abstract
In the design and development of software systems, redundancy mechanism is a technique that improves the reliability of a system. Therefore, the mechanism of redundant processing of core modules in a module-based software system was proposed in this study on the basis of the analysis of the structural redundancy of a software system and its impact on reliability. This mechanism includes a dual-module redundancy structure of a single module and a dual-module redundant structure of combined modules; fault detection and judgment method was also presented. Simultaneously, the reliability of the system is analyzed on the basis of various redundant structures.
Coupling characteristics of lightning impulsive current on the underground coaxial cables
Authors: Jiao Xue , Zhang Qilin , Xing Hongyan , Zhou Junchi 
Published: March 2020

Abstract
In this work, we analyzed the influence of lightning electromagnetic impulses on the underground coaxial cables through environmental simulation and got such conclusions. 1) The coupling voltage is proportional to the length of the underground coaxial cable. 2) The coupling voltage is inversely proportional to the depth of the underground coaxial cable. 3) The coupling voltage is proportional to the value of the impulsive voltage. These discoveries are of great application value for lightning protection techniques of coaxial cables.
Energy Consumption Analysis of Deep Peak Regulation in a 300MW Plant With Subcritical Steam Drum Furnace
Authors: Liu Ke , Liu Jinbiao , Wang Haichao , Yang Xingsen , Wang Shouen , Hou Funjun , Hu Zhihong 
Published: March 2020

Abstract
Based on the operation and energy consumption calculation data of 300MW subcritical steam drum furnace in a plant, the energy consumption variation characteristics of the unit under various working conditions were analyzed. It was found that the coal consumption of the unit was about 40g/kWh higher than the rated load during low load peaking operation. The boiler efficiency was not significantly reduced during low-load operation, but the main and reheat steam temperatures were significantly reduced, resulting in a significant decrease in the efficiency of the high and medium pressure cylinders of the turbine. In addition, the analysis found that high auxiliary power consumption rate was also an important factor affecting low load energy consumption during low load operation.
Research on the Construction of Intelligent Meter Reading System Based on Energy Metering Integrated Acquisition Technology
Authors: Chen Gao , Zhongan Ding , Shian Zhan , Wuxiao Chen , Kunrong Ye 
Published: March 2020

Abstract
At present, the energy metering equipment used by Chinese residents mainly covers electricity meters, water meters, gas meters and heat meters, which are separately managed by different enterprises in the four energy industries. However, in addition to the power industry, the other three energy industries have not yet established enterprises that operate on a national basis, which poses a major challenge for the management of operations and management. The meter reading fee is difficult to become a major problem. To this end, the integrated measurement of electricity, water, gas and thermal energy has become an exploration of the State Grid focusing on resource intensive construction. Based on the research background, this paper establishes an energy metering integrated intelligent meter reading system. Based on the requirements of the system, the paper designs the functional structure, technical architecture system and operation management mode of the intelligent meter reading system. It is expected to realize electricity, water, and the gas and thermal energy measurement management system group standard design is based on the “Internet +” electricity, water, gas, and thermal energy measurement business operation mode, and establishes an integrated operation system for meter reading, charging, operation and maintenance, and service.
Low Voltage Distributed Photovoltaic Power Station Connected Estimation Model Based on Dispatch Automation System
Authors: Ma Dayan , Xie Xiangying , Chang Yan 
Published: March 2020

Abstract
A large number of distributed photovoltaic access grids pose great challenges to the safe and stable operation of the grid. In view of the fact that the dispatching automation system does not realize the real-time acquisition and monitoring of low-voltage distributed photovoltaic data, this paper proposes the station estimation method as an auxiliary means for real-time acquisition of low-voltage distributed photovoltaic power plants, and estimates the comprehensive low-voltage distributed photovoltaic power plants through appropriate algorithms. Access. Through case analysis, the deviation between the estimated value and the measured value is basically controlled within 8%, which proves the accuracy of the estimated model. This method is of great significance for the power dispatching department to strengthen the operation monitoring and statistical management of distributed photovoltaics, and to reasonably arrange the dispatching plan and coordinate the power supply.
Summary of Research on Quality Control Technology of Secondary Equipment Maintenance in Smart substation
Authors: Hong Meizi , Li Hengxuan , Xia Yongjun , Wang Zuowei , Du Zhen’an , Chen Hong , Chen Meiz 
Published: March 2020

Abstract
According to the characteristics of secondary equipment technology of smart substation, the maintenance work specifications and precautions of smart substation are reviewed. The performance inspection methods of various types of solo equipments were analyzed. By comparing each process of solo device specification and the test method of interval group function, the precautions of various aspects of the risk management and control of secondary equipment maintenance were summarized, and the overall principle of specification on secondary equipments of smart substation was proposed.
Research on the Application of Smart Site Management for Cross-regional Power Grid Project Based on the Basic Framework of Digital Power Grid
Authors: Sun Wencheng , Cheng Wentao , Peng Yuhui , Wang Hongjie , Liu Jianqiao , Zhang Haoyu , Wang Jian 
Published: March 2020

Abstract
In order to further improve the infrastructure management level of power grid projects and promote the fine management and scientific organization of power grid projects. Based on the basic framework of digital power grid, this paper uses UAV remote sensing, geographic information system, 3D virtual simulation, mobile Internet, Internet of things, intelligent sensor and other technical means to build a intelligent management and control platform integrating monitoring, early warning, command and emergency response. Exploring the application scenarios in terms of project schedule, quality, safety, special project, and on-site Internet of things perception. Practice shows that the construction of the platform can effectively improve the overall control of the power grid construction site and all kinds of information control level and risk prevention and control capabilities..
Research on Technology Economy Based on Centralized Gas Supply of Crop Fuel Energy
Authors: Li Zhiyuan , Lv Xing , Fu Chaosong 
Published: March 2020

Abstract
The crop fuel supply chain is the basic guarantee for the transformation of crop fuel resources, and it is the key to realizing the development and utilization of large-scale crop fuel energy in the future. This paper analyzes the technical issues related to crop fuels, and introduces the current status and existing problems of crop fuel harvesting, collection, storage, pretreatment and transportation. At the same time, it summarizes the technical economy of the supply chain, and compares the research methods that are often used in China. It is the main way of current research to establish energy-based gas supply by establishing quantitative technical and economic indicators. How to make full use of crop fuels and convert them into high-grade energy to meet the energy needs of farmers living and producing, and to promote the improvement of agro-ecological environment is of great significance.
Analysis of current characteristics of corona discharge in high voltage transmission
Authors: Wu Yong , Lei Lei , Zhang Jianhu , Ge Duode , Zhang Jun 
Published: March 2020

Abstract
In order to study the current characteristics of corona discharge in high voltage transmission, the time-domain characteristics and volt ampere characteristics of corona discharge under different high voltage are tested and analyzed. The actual test results show that: in the whole process of corona discharge, with the increase of inter electrode voltage, the frequency of pulse current increases, and the duration of current remains unchanged; negative corona discharge is more likely to occur, and with the increase of voltage, the average current growth rate is higher than positive corona discharge. Under the same interelectrode voltage, the negative corona current is stronger than the positive one. The nonlinearity of equivalent resistance between positive corona discharge electrodes is stronger than that of negative corona discharge.
Noise Characteristics of Distribution Power Transformers under Field Load Conditions
Authors: Wu Xiaowen , Hu Jingzhu , Zhu Lingyu , Yi Meisheng , Cao Hao , Lu Ling 
Published: March 2020

Abstract
In order to investigate the influence of load conditions on the noise characteristics of distribution power transformers, a platform in semi-anechoic room is designed for on-site transformer noise simulation. Transformer noises in balanced, unbalanced and harmonic load conditions are tested, respectively. The spectral distributions and A-weight sound pressure levels (SPLs) are compared to investigate the discrepancy caused by various load conditions. The result shows that the transformer noise is relevant with unbalanced load. Harmonic content is found to have obvious influence on the noise level of distribution power transformer. When harmonic load current is applied, the noise level of distribution power transformer increase obviously. The results can be referenced for the field noise and vibration control of distribution power transformers.
Longitudinal Protection Scheme of HVDC Line Based On the Characteristics of Branch Current
Authors: Xu Zhiming , Liu Jun , Bai Tianyu , Tang Wenqiao 
Published: March 2020

Abstract
For the traditional high-voltage direct current (HVDC) lines with poor protection rapidity and low resistance to high resistance, This paper puts forward a kind of based on HVDC line reactance flat wave branch current changes of the longitudinal protection scheme. This scheme takes advantage of the fact that the specific harmonic component of the flat-wave reactance branch current is short-circuited by the equivalent dc filter bank when it is internal fault. The characteristics of no such harmonic component flow on the branch can be used as the basis to identify internal fault and external fault. In other words, when it is internal fault, the component of the flat-wave reactance branch is close to 0; The component of the flat wave reactance branch is much larger than 0 when it is external fault. Simulation results show that HVDC longitudinal protection scheme based on branch current characteristics can quickly and accurately identify fault types in various situations and has a strong ability to withstand transition resistance.
Research on Risk Sharing Mechanism of Power Materials Project under Incomplete Contract Environment
Authors: Zhu Yunxiang , Xia Huali , Xu Zhenchao 
Published: March 2020

Abstract
Due to large capital investment and good economic benefits, power infrastructure projects are suitable for project financing. The repayment guarantee of project financing comes from the project itself rather than the guarantee provided by the guarantor. Therefore, the risk sharing mechanism in project financing is particularly important. This paper proposes that due to the existence of bounded rationality, transaction cost and information asymmetry, the contract of financing of power infrastructure projects is incomplete. According to this condition, the risk sharing mechanism between the actual investors of the project and the project loan bank is established; The asymmetry situation constructs a risk-sharing bargaining game model with incomplete information, calculates the respective risk-bearing ratios of both parties, and provides a basic conclusion for the future financing model of power infrastructure projects.