bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Safety Protection Control of Equipment Terminal Access based on Power Private Network
Authors: Ou Wang , Wei Li , Chengming Jin , Wenjie Zhang , mingyu Yang 
Published: June 2020

Abstract
In this paper, based on the application requirements of the power industry for the wireless private network, the networking and security protection technology of the power wireless private network are studied. Firstly, it analyzes the necessity of establishing the electric power wireless private network, and then gives the system architecture and technical system of the electric power wireless private network; studies the security risks and Countermeasures Faced by the TD-LTE wireless private network, and analyzes the technical applicability of the TD-LTE wireless private network in combination with the electric power wireless technology policy, so as to provide a reference for the construction of the electric power wireless communication network.
A Novel Sensor Detection Method of Partial Discharge in GIS based on the UHF Electromagnetic Wave
Authors: Hongyi Zhao 
Published: June 2020

Abstract
UHF electromagnetic wave has been widely used in various PD measurements of GIS (gas insulated switchgear) because of its high sensitivity, strong anti-interference ability, large effective detection range, fault location and pattern recognition. In this paper, a new method of detecting partial discharge of pouring hole on GIS insulator is studied. The transmission characteristics of UHF electromagnetic wave are simulated by FDTD. Based on the computer simulation technology (CST), a dipole antenna UHF sensor is developed. Finally, the sensitivity and validity of the sensor are tested on the 110kvgis experimental platform. Compared with the conventional method, the sensitivity of PD detection in GIS is obviously improved.
Preliminarily Realize the Remote Diagnosis of the Running State of the Power Station Unit with Principal Component Analysis Based on Java Program
Authors: Zhang Hui , Niu Xiaochuan 
Published: June 2020

Abstract
For realizing the remote diagnosis of the running state of the power station unit preliminarily, the article accomplishes relevant calculation module for implementing the PCA program, and sets up the data interface of power plant data and PCA module by using the Java program, which completes the calculation and analysis of power plant data in a timely and efficient manner, removes the complexity of manual processing in large dimension data filed and realizes the real-time processing of operation parameters of power plant. Furthermore, the portability of program modules is enhanced and the work efficiency is greatly improved by making the program module executable, which provides a certain reference basis for the monitoring of operation of power plant unit.
Design of Dual MCU Vehicle Control Unit Based on Electric Vehicles to Respond to Control Failure
Authors: Li Jiashun , Li Dan , Xu Ying 
Published: June 2020

Abstract
The Vehicle Control Unit (VCU) is the core component of the entire car. It is responsible for collecting the accelerator pedal signal, brake pedal signal, gear signal and other component signals, and makes corresponding judgments based on the vehicle status to control the next controllers of each component of the layer act to drive the electric vehicle. This article introduces the overall system structure of the electric vehicle and the structural characteristics of the Vehicle Control Unit, analyzes the benefits of the dual MCU Vehicle Control Unit to the electric vehicle, and finally establishes the corresponding detection and response methods when various possible failures occur. The detection and response mechanism uses the main and auxiliary dual MCUs as the control core and cooperates in processing. When the main MCU fails, the auxiliary MCU takes over the control to avoid the uncontrollable safety problems caused by the control of the entire vehicle when the single MCU fails.The dual MCU controller uses the main and auxiliary differentiated design, and the functional design of the main and auxiliary MCUs is based on the functional modularity idea. After the main MCU meets the functions of vehicle control and other functions, the sensor signal detection and other functions are added to the auxiliary MCU. A dual MCU Vehicle Control Unit based on electric vehicle response to control failure is presented.
Operation status evaluation of low voltage distribution network based on PCA- entropy combined weight method
Authors: Yiranyou  , Guo Shishi 
Published: June 2020

Abstract
With the rapid development of smart grid and distribution network intelligence, how to accurately grasp the operating status of the distribution network is an urgent task. Therefore, this paper proposes a method for evaluating the operating status of low-voltage distribution networks based on the PCA-entropy combined weight method. Firstly, the improved principal component analysis (PCA) is used to extract the distribution network evaluation indexes and establish an evaluation index system, which from the four aspects of safety, reliability, quality, and economics. Then model the indexes of each level and calculate the subjective and objective comprehensive weights of the indexes of each level by using the entropy combination weight method. Finally, the feasibility and practicability of the method are verified by comprehensive evaluation of the actual distribution network.
Analysis and Application of Abnormal Electricity Based on Mean Shift Clustering and XGBoost Verification
Authors: Liu Aimin , Sun Feng , Li Wei , Wen Xin , Wang Tong , Cheng Xuke 
Published: June 2020

Abstract
with the gradual development of consumer behavior analysis, abnormal electricity consumption analysis has become a hot Topic in the analysis of mining data. At present, the abnormal power analysis method based on manual verification and judgment is inefficient and has a low hit rate. In this paper, the mean shift clustering algorithm is adopted to cluster the electricity consumption and the fluctuation of electricity consumption respectively and the residents with large electricity consumption and large fluctuation of electricity consumption are selected as suspected abnormal electricity consumption. Then, based on the decision tree model of xgboost, the users suspected of abnormal electricity consumption are filtered twice to realize the automatic study and judgment of electricity consumption behavior and make full use of the massive data resources of the power grid. The value of the source greatly improves the efficiency of verification and helps power enterprises to recover considerable economic losses.
Research on Comprehensive Evaluation Model of Investment Benefits of Transmission and Transformation Projects
Authors: Ge Junkai , Xu Xiaoyu , Chen Wenhan , Shao Jian , Chen Chao 
Published: June 2020

Abstract
With the rapid development of our country’s economy, the demand for electric energy from the whole society is constantly increasing. As the infrastructure supporting power supply, the level of investment and construction efficiency is particularly important for supporting social and economic development and supporting the operation and development of power grid companies. Under these conditions, the comprehensive evaluation of the investment and construction benefits of power transmission and transformation projects is of great practical significance to enhance the management level of China’s power transmission and transformation projects, improve the quality of project construction, and improve the level of utilization of project investment funds.
Research On VSG Comprehensive Control Strategy For Power Grid Voltage Sag
Authors: Xiangyang Yu , Zekai Lu , yan Ding , Chunyang Gao , Shiyan Liu , Dong Liang 
Published: June 2020

Abstract
Virtual Synchronous Generator (VSG) photovoltaic inverter still has the problems of surge current and voltage overcharge when the grid voltage drops. Aiming at the problems mentioned above, the comprehensive control strategy for AC/DC is proposed. The direct current (DC) side adopts the strategy of super-capacitor energy storing and switching Maximum Power Point Tracking (MPPT) derating, the alternating current (AC) side adopts the control strategy of virtual impedance and the vector difference of limited voltage, which are based on the quasi-proportional resonance. Particle swarm optimization (PSO) is used to optimize its parameters because of the difficulties in adjusting parameters of quasi-proportional resonance control by experience. This strategy can track on the voltage with no difference when the voltage is normal, it can also limit the overcharging voltage and the surge current into the demanded range when the voltage drops. Finally, the effectiveness of the strategy proposed in the paper is verified by simulation.
Research on the Design of Building Envelope Based on DeST
Authors: Guan Zhenzhong , Qu Lei , Xu Yanxin 
Published: June 2020

Abstract
School buildings in China have unique features and rules of use. The indoor thermal environment during the study period is very important, but it can be ignored during the summer vacation and winter vacation. It is very difficult to determine the parameters of building envelope through the designer’s experience in order to ensure a good indoor thermal environment and energy consumption level of school buildings. The design of building envelope can be optimized by DeST. In this paper, the design scheme of an experimental building in a school in Beijing is simulated by DeST. Not only were the defects of the first scheme analyzed, but the optimization measures were also proposed. Finally, the goal of low energy consumption and high comfort was achieved.
A multi-sequence method for monthly unit combination optimization using flexible resources
Authors: Cui Dai , Xu Fei , Ge Weichun , Min Yong , Zhou Yunhai , Chen Xiaodong , Zhao Pinchao 
Published: June 2020

Abstract
In order to solve the problem of renewable power curtailment, the authors put forward a multi-sequence monthly unit combination optimization method using flexible resources. In addition, an algorithm is proposed to estimate the capacity of peak load shifting of flexible resources in day-ahead or intraday scheduling. By optimizing various types of flexible resource scheduling in day-ahead or intraday scheduling, the maximum load of the system is lessened, and the limit on the capacity of thermal power units is reduced to improve the system’s ability to accommodate renewable power. In the monthly unit combination optimization model, the total minimum output of thermal power units is introduced into the objective function, which can further reduce the thermal power start-up capacity in the monthly plan to increase the system’s spinning reserve and to expand the renewable power accommodation capacity of the system. Various practical constraints are taken into account. The mixed integer programming and software GLPK are used to program and solve the model. Finally, an example of a provincial grid in north China is given to verify the effectiveness of the proposed method.
Analysis and preventive measures of a shutdown accident caused by high voltage insurance slow melting of a voltage transformer used in excitation system
Authors: Qian Zhunli 
Published: June 2020

Abstract
The voltage transformer (TV) excitation system high-voltage fuse is divided into two cases: one is a short-time fast fuse in the high-voltage fuse, and the voltage on the secondary side of the transformer should drop to zero in an instant. The second is that the high-voltage insurance is slowly fused for a long time, and the voltage on the secondary side of the voltage transformer drops slowly, resulting in the excitation system erroneously strong excitation, the terminal voltage rises, the over-excitation protection action chain reaction, and even the accidental trip. In recent years, the shutdown accidents frequently occur in China due to the high voltage insurance slow-melting of excitation voltage transformers. In this paper, the author analyzes the accident caused by the slow melting of TV high voltage insurance for excitation of one-million-kilowatt units in a company, and puts forward some preventive measures.
Analysis of nondestructive testing method for transverse crack of water wall of Supercritical Boiler
Authors: Zhang Yanfei , Gong Yongqiang , Wang Yingjun , Han Kuo 
Published: June 2020

Abstract
According to the mechanism and characteristics of transverse crack of water wall steel tube, the feasibility, advantages and disadvantages of non-destructive testing methods such as visual testing, magnetic particle testing, ultrasonic testing, eddy current testing, penetrant testing and radiographic testing for transverse crack detection are described. The results show that the array eddy current and far-field eddy current have the advantages of small amount of work, high sensitivity, convenience and high efficiency when they are used to detect the transverse crack of the water-cooled wall steel pipe in service.
Analysis of Stability and Dynamic Model Simulation of Mountain Tractor Rollover
Authors: Yang Hongtu , Xia Changgao , Han Jiangyi , Chen Chen , Zhang Hongdang 
Published: June 2020

Abstract
A rollover model for for predicting the operation of mountain tractors in hilly areas is presented. The quasi-static rollover model and the transient rollover model of the mountain tractor are studied, and the dynamic equations are also derived. The simulation model is set in the Carsim/Matlab Simulink environment, the rollover threshold of the tractor when cornering with a certain lateral acceleration under the angular step condition is analyzed. The anti-rollover control is used when one of the four wheels loses contact with the slope surface. The most significant result is that the model suggests that employment of active rollover control of the wheels may hinder the tractor from rolling on the slope. Thus, it proves the rationality of the model presented.
Research on DC grounding finder to effectively prevent microcomputer protection malfunction caused by one-point grounding of secondary circuit
Authors: Wen Caiquan , Chen Manjiang 
Published: June 2020

Abstract
The problem of protection malfunction caused by one-point grounding of the secondary circuit has received extensive attention, which have been updated in several domestic industrial standards, but the problem of microcomputer protection malfunction due to one-point grounding of the secondary circuit still occurs frequently during operation. According to the analysis, with the comprehensive promotion of microcomputer protection, low-power operating element have been used on a large scale, which makes the grounding resistance of the DC system larger. The relevant parameter setting, principle design and specification requirements of the original DC grounding finder have not been taken into account, which leads to frequent occurrences of secondary equipment malfunction in the DC grounding search process. In-depth analysis of the typical grounding situation showed that the detection resistance value of the existing DC grounding finder is too small, and when both positive and negative electrodes are grounded with high resistance, protection malfunction caused by DC grounding finder may occur. According to the asymmetric characteristics of existing secondary circuits, an asymmetric DC grounding finder was designed, with a strong anti-protection malfunction ability, it was verified by actual measurement that the detection sensitivity of the instrument on ground resistance was improved by more than 50%.
Research and Application of Adjustable Load Measurement Technology Based on Blockchain
Authors: Teng Zhang , Yucheng Ren , Xiaodong Cao , Kang Xie , Junjun Shao 
Published: June 2020

Abstract
In order to promote the synergistic interaction between source network and storage, and enhance the load control capability, the adjustable load measurement technology based on blockchain has become the focus of research at home and abroad. This paper reviews the current research status of block chain technology and its application in declaration and issuance, market supervision, market settlement, load measurement, enhancing mutual trust of market transactions and information security. Distributed ledger from block chain under containerized edge service engine, improved directed and acyclic chart distributed ledger structure and adjustable load execution score three based on distributed ledger data. In this respect, the key and difficult points of technology are summarized. Combined with the current situation of power development demand, power market, electricity price mode, demand response, the possible problems and development trend of adjustable load measurement technology based on block chain are discussed in detail.
Research on Cluster Monitoring and Prediction Platform based on Zabbix Technology
Authors: Peixian Cong , Shenghua Bian , Hongliang Zheng , Baoyu Tang 
Published: June 2020

Abstract
With the rapid development of Internet and computer technology, cluster technology has been widely applied to the explosive growth of network data. With the successful construction of the cluster and the continuous expansion of nodes, the reliability and stability of the cluster itself has become an important factor that cannot be ignored, so various monitoring systems emerge. Based on the above reasons, this paper proposes a real-time monitoring and prediction platform for enterprise users based on Zabbix. The monitoring and prediction platform monitors all kinds of indexes in the cluster in real time and predicts important performance indexes in real time. When monitoring or predicting the abnormal situation, the system can warn the users, which is conducive to the real-time understanding of the cluster operation. The short-term real-time prediction model of cluster monitoring index is introduced in detail in this paper. Finally, the real-time monitoring function of indicators is designed and analyzed based on the prediction model.
A Power Big Data Processing Method for Heterogeneous Data Sources
Authors: Hongjun Du , Wei Li , Ou Wang , Wenjie Zhang 
Published: June 2020

Abstract
With the advent of the era of electric power big data, the volume of electric power data will grow at an unprecedented speed. In this paper, we propose a construction scheme of electric power big data service platform. The platform is positioned as a data sharing, analysis and application platform. Data acquisition, storage, preprocessing, visualization and other aspects can be realized. This paper analyzes the demand of platform construction and designs the platform architecture. At the same time, we introduce the implementation way of big data platform from the aspects of overall platform architecture, functional architecture and technical architecture. And the power big data mining algorithm based on Apriori algorithm is introduced. It can be seen that the platform can provide a reliable analysis and mining platform for data mining in power industry.
A new method for vital sign monitoring using IR-UWB radar
Authors: Beidian Liu , Qixiang Fu , Zhezheng Chen , Wenyu Tao , Zhiqiang Dai 
Published: June 2020

Abstract
Quadrature Demodulation IR-UWB radar is a new form of impulse-radio Ultrawide Band (IR-UWB) radar and it can improve the resolution of distance measurement. This paper focuses on a new method for vital sign – specifically breathing rate and heart rate – from the phase of recorded I/Q signals, using Quadrature Demodulation IR-UWB radar. The results of the experiment show that a better estimation of heart rate can be got from such a new method based on the phase difference.
Research on Train Secondary Pulsation Elimination Method
Authors: Wang Chengtao , Zhang Yuxi , Qiu Ruichang 
Published: June 2020

Abstract
In the train traction system, the single-phase four-quadrant converter achieves the same frequency and phase of the voltage and current on the grid side, but it cannot avoid generating secondary pulse power of the same magnitude as the DC side load. The traditional method is to connect the LC secondary resonance circuit in parallel on the DC side, but the volume and weight of the resonance circuit are relatively large, which reduces the power density, which does not meet the development trend of lightweight trains and the requirements of energy saving. The active filtering method of the secondary pulsation can not only effectively eliminate the secondary pulsation, but also cancel the bulky LC filter, reduce the axle load, increase the passenger capacity, and realize green energy saving.
Modeling and Controller Design of Flyback Converter Operating in DCM for LED Constant Current Drive
Authors: Feng Wei , Chen Yiwen , Jiang Jiahui , Jiang Weiting 
Published: June 2020

Abstract
In power converter, the system model has a significant meaning of the design of the controller and the dynamic characteristics. In this paper, the switching network average method is used to set up the small signal model of flyback circuit, which is operating in discontinuous current mode(DCM). A controller with single zero and single pole is designed based on the small signal model which is set up in this paper. Moreover, the analysis of system stability and dynamic response is proposed. Finally, the system is simulated and verified by a flyback LED constant current drive circuit (220AC input, 0.7A/16W output).
Research and application of PFC controlbased on command extra compensation
Authors: Li Jun , Meng XiangRong , Wendongzhang  , Songgao  
Published: June 2020

Abstract
Based on the analysis of the unit’s PFC(primary frequency control) operation process, combined with the grid performance assessment standards, it was concluded that the inherent delay and inertia of the unit equipment caused PFC action to fail. Aiming at the problem of lack of turbine speed dead-band estimation for the PFC performance evaluation of thermal power units, by constructing the correlation domain between the turbine speed difference and the actual power difference of the unit’s daily operating data, the turbine speed dead-band of the unit was estimated. An optimization control method based on command extra compensation for PFC was proposed to improve the qualified rate of unit’s PFC operation.
Application of Tissue Engineering in Skeleton: A Review on Recent Trends and Advances
Authors: Wang Runtian 
Published: June 2020

Abstract
Due to the biological properties of bone and cartilage, tissue engineering, a new solution with no limit on supply, has gained much attention and many investigations over the past few years. In this review, three basic elements of tissue engineering in skeleton are discussed. Take planting trees as an analogy, scaffolds are the soil providing support, growth factors are fertilizers and pesticides which create a suitable environment together with scaffolds, and cells are the seed whose health and proliferation are the ultimate goals. Both stem cells and terminal differentiated cells like chondrocytes are investigated. Growth factors promoting differentiation, osteogenesis and vasculation are also included. Moreover, many studies focus on manufacturing scaffolds with perfect biological and mechanical properties, in which various structures and components are researched. Besides, 3D bioprinting are utilized for accurate control. Furthermore, studies on engineering and science, in vivo trials, and more available resources have been researched.