bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis on the Influence of Remote 110kV Substation on Transformer DC Bias
Authors: Zhang Lina , Yang Yunguo , Wang Peng , Hou Jiansheng , Sheng Jun , Dong Lingpeng 
Published: August 2021

Abstract
High voltage direct current (HVDC) transmission system has the advantages of large capacity, long distance and low loss. Relying on the advantages of HVDC transmission, China has established a large-scale energy transmission channel in the west, effectively solving the problem of uneven local energy distribution. However, HVDC transmission will generate ground current when it is operating in a single pole, which will cause the DC bias effect of the transformer. At this time, the core magnetic circuit of the transformer is saturated. Transformers will experience increased vibration, increased noise, local overheating, and surge in harmonics. This paper, based on the Jinhua HVDC transmission project as a background, established a power grid topology model in Zhejiang area based on the field-circuit coupling method. The focus is on calculating the DC bias of Shenze transformers in Jinhua area, and proposing treatment measures based on the calculation results. According to the actual measurement of the project, the accuracy of the calculation result is verified, which reflects the effectiveness of the governance measures.
The Partial Discharge Field Test of 1000kV Shunt Reactors
Authors: Li Jiansheng 
Published: August 2021

Abstract
Aiming at the insulation performance field diagnosis of 1000kV shunt reactors, the series resonant withstand voltage test equipment is developed. The test equipment mainly consists of the frequency conversion power supply, the excitation transformer, the series resonant capacitor, the wave blocking resistor and the voltage divider. The resonant frequency is between 30 and 300 Hz, the rated voltage is 1200kV, and the capacity is 1000 kW. During the test, the discharge is monitored at the high voltage bushing terminal and the 1000kV reactor insulation is analyzed. By using the developed test equipment, the 1000kV reactor in 1000kV Xuyi Station is tested, which verifies the validity of the on-site partial discharge measurement test.
The robust recovery model of distribution network considering correlation between wind speed and load
Authors: Mei Xiaohui , Zhao Chenxi , Liu Yan , Han Jianzhen , Zhao Haizhou 
Published: August 2021

Abstract
In order to consider the correlation between distributed power output and load, this paper uses the value-at-risk theory to quantitatively calculate the uncertainty of wind speed and load demand, and establishes a wind speed-load joint probability distribution model using bivariate normal distribution, which will take into account the wind speed uncertainty. The robust decision-making problem of reliability and load participation is characterized as a mixed-integer linear programming problem, which takes the minimization of the equivalent load loss as the optimization goal, establishes the load recovery path as the optimization variable, and takes the wind speed and load as the disturbance variable to account for the wind speed-The load-dependent robust restoration model of the distribution network is solved by the Gurobi high-efficiency solver. Finally, the IEEE69-bus power distribution system with wind power was used to verify the effectiveness of this model and solution method.
Study on Magnetic Field Shielding Effectiveness of Slotted Conductor Plate
Authors: Du Rongtian , Jiao Chongqing , Zhang Zhixin , Yang Yong , Wang Jialong 
Published: August 2021

Abstract
In this paper, the magnetic field shielding effectiveness of slotted conductor plate is tested. According to the dominant effect of magnetic shielding at different measuring points, the slotted conductor plate is divided into edge effect area, platform area and aperture leakage area, and the change law of magnetic field shielding effectiveness in different regions is analyzed. The magnetic field shielding effectiveness of slotted conductor plates at different frequencies is tested. The results show that the shielding effectiveness increases with the increase of frequency.
Research on Actual Road Emission Prediction Model of Heavy-Duty Diesel Vehicles Based on OBD Remote Method and Artificial Neural Network
Authors: Wang Jiguang , Wang Li , Ji Zhe , Qi Songbo , Xie Zhenkai , Yang Zhiwen , Zhang Xiaowen 
Published: August 2021

Abstract
In order to establish a prediction model of PM and NOx emission factors for heavy-duty diesel vehicles under actual road conditions based on OBD remote monitoring and big data, this paper carried out actual road tests on two China V heavy-duty diesel vehicles to obtain transient OBD and emission data by a Portable Emission Measurement System (PEMS) and self-developed On-board Remote Emission Measurement System (OREMS). According to the degree of influence of different parameters in the engine OBD on PM and NOx emissions, the principal component analysis method is used to extract the principal component parameters used to predict the model input, and the construction of a "Heavy-duty Diesel Vehicle Predictive Model based on Remote Monitoring Data and Neural Network Technology". Finally, the predictive model is trained and verified by PEMS test data. The prediction model provides new means and methods for the future development of large-scale heavy-duty diesel vehicle NOx and PM emission predictions under actual road operation.
Analysis of Instantaneous Collision Process of Axial Flow Check Valve Closing
Authors: Wang Ting , Zhang Yingjie , Kong Beibei , Wu Jialiang , Ni Xiaomei 
Published: August 2021

Abstract
When the pump stops suddenly, the axial flow check valve will shut down suddenly under the action of the medium pressure differential force, and the impact load between the disc and the valve seat will produce when the valve closes, which will have a certain impact on the structural strength and life of the check valve. In this paper, the display dynamics is used to simulate the impact process of the disc and the valve seat when the valve is completely closed. The dynamic response of the disc and the seat, the velocity of the disc and the energy change during the collision are obtained. The research has certain guiding significance for the practical application of axial flow check valve.
Simulation of Time Delay Characteristics of Time Sensitive Networking Based on MATLAB/Simulink
Authors: Tong GuoFeng , Li Jiang , Gao HuiSheng 
Published: August 2021

Abstract
In order to realize the optimal design of time sensitive networking flow scheduling strategy and meet the communication requirements of time sensitive applications to the greatest extent, it is necessary to conduct a comprehensive study on the delay characteristics by using effective simulation methods. Firstly, the working principle of time sensitive networking flow control mechanism and the influencing factors of time delay are analyzed, and the basic goal of simulation research on time delay characteristics is defined. Then, the technical characteristics of different network simulation methods are compared, and MATLAB/Simulink is selected as the simulation tool to design the time sensitive networking delay model and simulation algorithm. Finally, aiming at the main flow control mechanism application scenarios, the feasibility and correctness of the time sensitive networking delay simulation method based on MATLAB/Simulink are verified. The research results have reference value for the study of time delay characteristics and the optimization design of flow control strategy of time sensitive networking.
Power System Load Forecasting Method Based on LSTM Network
Authors: Luo CuiYun , Ling WuNeng , Mo Dong , Li YiMing , Li QiuWen , Liang ZhenCheng , Zhang Pan 
Published: August 2021

Abstract
Scientific load forecasting methods and accurate forecasting results are an important basis for the power system planning department work, as well as the basis and guarantee for correct decision-making on investment and construction. This paper has thoroughly studied the basic principles of recurrent neural networks and their shortcomings that they cannot solve long-term dependence problems, and a power system load forecasting method based on LSTM networks is proposed. Through the built-in two memory state lines of long term and short term, the problems that it is difficult to capture the long-term development trend and short-term fluctuation characteristics of data in time series prediction were solved. The results of case analysis show that this method can effectively improve the accuracy of power system load prediction.
Research on Collaborative Planning Technology of New Energy Power System
Authors: Deng JiaoJiao , Zhang LinNa , Li XuXia , Li Jia , Zheng XiaoMing 
Published: August 2021

Abstract
In this paper, the collaborative planning technology of new energy power system was intensively studied, and the model of collaborative planning of new energy power system was established after considering the power structure, power distribution, coordination and optimization of power grid, limited resources, peak load regulating of power system and access of new energy. The results of numerical examples show that this model can guarantee the safe and stable operation of the power system, reduce the cost of investment, and improve the capacity of the power system to absorb new energy.
Research on Safety Risk Evaluation Model of Bridge Construction Based on Analytic Hierarchy Process
Authors: Wu Changqing , Yan Yu , Yang Sijie , Huang Yuxin , Ren Xueying , Wu Hui , Dong E , Zhu Siyue 
Published: August 2021

Abstract
Bridges are the key to connecting the entire highway, directly affecting the economic and social benefits of the highway. In recent years, China’s highway bridges have faced such phenomena as frequent traffic accidents caused by heavy traffic, high vehicle loads, and fast speeds, and the severity of accidents has become worse. It is imperative to evaluate the safety of bridges. Bridge safety risk assessment is an important means to effectively prevent and reduce traffic accidents. Based on the in-depth analysis of the influencing factors of bridge construction safety, this paper determines the impact of bridge construction safety evaluation index system, on this basis, adopts the analytic hierarchy process (AHP), establishes a bridge construction safety risk evaluation model based on the AHP, proposes the impact the key factors of bridge construction safety, and provides a reference for improving the bridge construction safety in China.
New Energy Power System Coordination Simulation Method
Authors: Zhang LinNa , Li XuXia , Li Jia , Deng JiaoJiao , Zheng XiaoMing 
Published: August 2021

Abstract
The power system planning is of utmost significance for the grid's safe, reliable, scientific and sustainable development. A scientific, refined, reasonable and adaptive scheme is of significant economic value and social value. The author made innovation based on the traditional operation analog model. Facing the massive new energy access issue, the author has established the intermittent and random new energy power system coordination operation simulation method that adequately reflect the new energy output. The study herein lays a theoretic and technological foundation for the optimal operation of future power system and the medium-and long-term sustainable development for energy.
An Eigenvalues Method for Stability Analysis of Power Grid with Energy Storage Devices Based on Discrete Time Domain Model
Authors: Sun Rong , Wang Qing , Wang Weiyuan , Tang Xiaojun , Cheng Jinmin , Song Yunting , Li Zheng 
Published: August 2021

Abstract
The eigenvalue analysis based on state space model is an important method to study stability of power grid. With the large-scale access of energy storage devices and power electronics converters in power grid, the conventional state space modelling method suffers from complicated process of determining state variables and large calculation amount of eigenvalues, and nonlinear stability characteristics of power grid cannot be accurately reflected. To obtain the eigenvalues of power grid with energy storage devices more efficiently, this paper proposes a method for constructing state space model of power grid based on discrete time domain model (DTDM) and presents the corresponding stability criterion. Compared with the conventional state space modelling method, the nonlinear characteristics of components under proposed method can be linearized, and the constructed state space model can capture a wider range of system information including energy storage devices. Besides, the complete state space model of power grid can be obtained only according to the connection between component's DTDM and grid. Moreover, because eigenvalue solution under proposed method relies on the sparse grid node voltage matrix, the calculation of eigenvalues is simple and efficient, and it visually presents variation trend of eigenvalue and investigates the stability of system. Simulation results in Simulink/Matlab verify the correctness and effectiveness of proposed method.
Research and design of automatic silkworm cocoon harvester for plastic collapsible mountage
Authors: Liu Mochen , Zhao Qingji , Wang Guangrui , Li Fade , Tian Fuyang , Song Hualu , Song Zhanhua , Yan Yinfa 
Published: August 2021

Abstract
Silkworm cocoon harvesting manually from the plastic collapsible mountage is laborious, time consuming and inefficient, to overcome the present situation of cocoon harvesting, a novel automatic cocoon harvester with dual harvesting roller rotating in opposite direction for plastic mountage was designed. By analyzing the force on concoon harvested with the harvesting roller, conditional equation of cocoon separated from plastic moutntage was obtained, when the pressure on cocoon acted by the harvesting roller was lowest. The parameters that achieved efficient cocoon harvesting were:(1) the gap between the two harvesting rollers was 3 mm;(2) the diameter of the harvesting roller was 47.7 mm. When the harvesting roller speed was 700 r/min, 1100 r/min, 1500 r/min, one-hour continuous cocoon harvesting test was carried out. According to the experiment result, the cocoon harvester efficiency was about 8.7 times the efficiency of manual harvesting for the plastic mountage. The novel cocoon harvester can be promoted and used in sericulture areas.
Maintenance characteristics and bolt-mesh-anchor support technology of Large-span roadway in Guotun coal mine
Authors: shibao Shen , Huaixuan Cao , pan Li , renbao Zhao , haoran Lu 
Published: August 2021

Abstract
Aiming at the support difficulties of 1100 working face in Guotun coal mine of Shandong energy Linyi Mining Group, this paper analyzes the maintenance characteristics and support principle of large-span roadway, and puts forward the combined support scheme of bolt, mesh and cable combined with the actual geological production conditions. The field measurement shows that the deformation of roadway tends to be stable after 15 days, the accumulated subsidence of roof is 250 mm, the approach displacement of two sides is not more than 130 mm, and the floor heave is 80 mm. Therefore, the support scheme can effectively control the roadway deformation and ensure the safety production of the working face.
Research on the Control Strategy and Control Method of Ship’s Automatic Berthing
Authors: Shi Hankun , Wang Xuelin , Zhu Shenchao , Zhou Hongmao , Zhang Zhaolun 
Published: August 2021

Abstract
Ship berthing and maneuvering have become one of the difficult and complex maneuvers. With the development of large-scale, rapid, and automated ships, the navigation safety and efficiency of ships have become more and more important. In this study, the control problem of automatic berthing is studied and analyzed, and the control strategy of automatic berthing is compared and analyzed. This study uses dynamic output feedback control, robust control, neural network control and other methods to automatically berth under-driven ships. In the research of berthing control, a robust adaptive control method is proposed by combining dynamic surface control technology with backstepping method for the automatic berthing control problem of intelligent ships under the influence of environmental disturbance and quay wall effect. This method solves the problem of increased computational complexity caused by the traditional backstepping method for the virtual control derivation, and effectively eliminates the chattering phenomenon of the control output.
Research on the Testing Device and Method of Ship’s Automatic Berthing and Unberthing
Authors: Wang Xuelin , Shi Hankun , Zhu Shenchao , Zhou Hongmao , Guo Zhaosen 
Published: August 2021

Abstract
This research analyzes the test device and test method of the ship's automatic berthing and unberthing test, and creates an automatic berthing and unberthing test device. The device includes a test working condition setting module, a shore-based data communication module, a test data recording module, and a shipboard data communication module. The automatic berthing and unberthing test device can generate the traffic environment perception information of the area where the berth to be tested is located, and interact with the real ship berthing and unberthing system to obtain the berthing and unberthing commands. According to different test scenarios, this research is divided into testing and comparison of unberthing and berthing operations. The created test method can reduce the risk of actual ship testing, improve the safety of automatic berthing and unberthing.At the same time, it can completely realize the whole ship test process of berthing and unberthing functions.
Overview of One-Key Sequence Control Technology Based on Isolation Switch Equipment Detection
Authors: Wang Guanfu , Tang Junci , Liu Guangli , Zhou Jun , Wang Lipeng 
Published: August 2021

Abstract
This article introduces the one-button sequence control operation of the isolating switch in the intelligent substation, as well as the sequence control system architecture and different kinds of identification technology operation applications. Combined with actual engineering, different recognition technologies have been proven practical and innovative.
Research Progress of the Temperature Monitoring Technology of the Electric Joints in the Ring Main Unit
Authors: Liu Changhua , Chen Jin , Shang Qiongling , Pan Dongqiu , Chen Xiao , Yu Jie , Chen Zhongbin 
Published: August 2021

Abstract
This article summarizes several existing temperature monitoring methods for cable joints inside the ring main unit, mainly introducing infrared temperature measurement, fluorescent optical fiber detection, passive wireless surface acoustic wave temperature measurement, and wireless temperature sensor measurement. Then, the above methods were compared, and the advantages and disadvantages of each method were clarified. Finally, the research on the temperature monitoring method of the cable joints in the ring main unit is summarized. And the follow-up development direction of the passive wireless surface acoustic wave temperature measurement method in the temperature measurement of the cable joints of the ring main unit is prospected. It provides some reference for the research on the temperature monitoring method of the cable joints inside the ring main unit in the future.
Research on Comprehensive Decision-Making of Distribution Automation Equipment Testing Results Based on Entropy Weight Method Combined with Grey Correlation Analysis
Authors: Fu Yu , Zheng Youzhuo , Hao Shuqing , Miao Yu 
Published: August 2021

Abstract
The traditional evaluation process of distribution automation equipment relies on the judgment of experts. In order to solve the problem of insufficient objectivity of the comprehensive evaluation process, a comprehensive decision-making method of distribution automation equipment testing results based on entropy weight method combined with grey correlation analysis is proposed. Firstly, the test and evaluation index system considering eight big indexes and thirty-five small indexes is established. Secondly, the entropy weight method is used to determine the objective weight, which can avoid subjective influence and make the weighting process more objective. Then, the improved grey correlation analysis method is used to achieve the sorting of the test results of distribution automation equipment. Finally, the effectiveness of the proposed method is verified by the analysis and comparison of case studies.
Research on diagnostic method for broken tooth fault of reducer with involute helical gear
Authors: Shuai Zhang , Zhengfeng Wu , Huilin Zhang 
Published: August 2021

Abstract
This article takes the reducer with the involute helical gear as the research object, the diagnostic method of the broken tooth fault and the deterioration trend is researched by vibration spectrum graph, demodulation waveform graph, time domain waveform graph, demodulation spectrum graph. The research results show that vibration spectrum graph has the worst guidance for the broken tooth fault of the involute helical gear reducer, demodulation waveform graph has the poor guidance in the initial stage of the broken tooth fault, with the deepening of the severity of the fault, the fault characteristics of the waveform gradually become obvious, time domain waveform graph and demodulation spectrum graph are the effective means to discover the initial fault and monitor the fault changes.
A Remote Automatic Detection And Calibration Device for AC Watt-hour Meters
Authors: Tian Wen , Wang Xiaoyu , Yang Zuopeng , Li Qi , Sun Lipeng , Wang Di , Wang Zongjing 
Published: August 2021

Abstract
In this paper, a remote automatic detection method for AC electricity meter standard device based on cloud technology, wireless communication technology and automatic control technology is developed, to improve the work efficiency of large-scale AC electricity meter calibration. By optimizing the internal structure of the standard AC power meter, the grade of anti-shock and anti-vibration is improved. Through the integrated GPS positioning device, intelligent locking device and vibration label, the safety of the equipment itself and the traceability of the flow process are ensured. The cloud service system is further established to realize the remote automatic detection of the standard device of the electricity meter, which greatly saves the cost of manual calibration.
Development of three-in-one equipment for withstand voltage, partial discharge and dielectric loss
Authors: Su Xin , Liu Shuai , Liu Haiyang , Zheng Zhe , Qiu Shi , Lu Yue 
Published: August 2021

Abstract
Many major accidents in domestic and foreign power grids were caused by cable defects, causing huge economic losses and adverse social impacts. At present, the three main tests for cable testing are withstand voltage test, dielectric loss measurement and partial discharge measurement, which require different equipment for testing, which is low in efficiency and time-consuming. Among them, the very-low frequency method is suitable for the withstand voltage test, and the damped oscillatory wave method is suitable for the measurement of dielectric loss and partial discharge. This paper is based on very-low frequency cosine square wave and damped oscillatory wave technology, implements technology integration, and realizes the three-in-one detection of withstand voltage, dielectric loss, and partial discharge for cable.