bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Peak Load Shifting Operation Strategy of Small-Scale Mobile Energy Storage Device in Distribution Network
Authors: Chen JianMing , Dai Ruijin , He Yilin , Chen Tiancheng , Chen Weimin 
Published: November 2021

Abstract
This paper studied two methods of using energy storage (ES) to achieve peak load shifting by charging and discharging. In different distribution network transformer power supply areas, the time of peak and valley of load is not identical. The small-scale mobile ES device was commanded to deliver energy at the peak of the power supply area to reduce the supply pressure of the power system by central control units (CCU), and while the load is at the valley, the ES charges and absorbs power to enhance the utilization rate of energy in the system. Currently, the control methods of peak load shifting for ES device (Constant Power Control and Threshold Control) were studied, and the operation results in power system were analyzed with their involvement, which provided the substantial supports for CCU to dispatch. Ultimately, the results showed the methods proposed were feasible and effective by simulation.
Substation-area Backup Protection Scheme for the Failure of 10kV Line Protection Device
Authors: Wang Yuxue , Liu Wei , Jiao Shaolin , Fang Zeya , Li Yiquan , Wen Minghao 
Published: November 2021

Abstract
The research on wide-area backup protection for high-voltage transmission lines has made certain progress in recent years, but there are few reports published on substation-area backup protection for low-voltage 10kV transmission lines. Based on the characteristics of shared information in intelligent substation, a substation-area backup protection scheme to deal with the failure of 10kV line protection device is proposed in this paper. This scheme uses the device self-test information and heartbeat mechanism to monitor the operation status of 10kV line protection devices; to realize the substation-area backup protection for the 10kV transmission lines when any line protection device fails, the protection criterion is constructed by the action results of power directional elements of transformer protections and other 10kV line protections. The proposed scheme can greatly improve the speed of the fault isolation and has low requirements for data demand and synchronization. PSCAD simulation results show that the proposed method is with high correctness and feasibility.
Influence of local shadow on output of photovoltaic array
Authors: Tai Kexin , Mo Chengkai , Hang Chao 
Published: November 2021

Abstract
This paper first deduces the engineering mathematical model of photovoltaic cells, then builds the photovoltaic cell and photovoltaic array model in Matlab/Simulink, and then simulates and compares the output of photovoltaic array under the condition of series and parallel connection, the number of shadows and shadow distribution. Finally, the different effects of shadow in series and parallel and the influence of shadow distribution on the output of photovoltaic array are analyzed.
Short-term load prediction of integrated energy system based on neural network
Authors: Wang Yao , Li Xuxia , Liang Yan , Hu Yingying , Zheng Xiaoming , Deng Jiaojiao 
Published: November 2021

Abstract
Considering the correlation and nonlinear characteristics of multiple types of loads in the integrated energy system, grey relation analysis (GRA) and long short term Memory (LSTM) neural network are selected to establish the short-term load prediction model of the integrated energy system. The model uses GRA method to analyze the coupling between multiple types of loads and the meteorological factors, and then obtains the load forecast results through the LSTM prediction model. Finally, a practical example is given to verify the validity of the model.
Research on Consistency of Transient Response Characteristics of Current Transformers for DC application in DC Engineering
Authors: Deng Xiaopin , Huang Hua , Liu Yong , Wang Xiaozhou , Liu Bin 
Published: November 2021

Abstract
In ultra high voltage(UHV) DC system, the transient characteristics for fault current monitoring of current transformers for DC application (DCCTs) and the consistency of response characteristics when different types of DCCTs are used for differential protection have become important factors affecting the safe and stable operation of DC system. In this paper, transient characteristics of all-fiber DCCTs and shunt DCCTs mainly used in DC system were studied, the main parameters of the transient characteristics including delay time and maximum peak instantaneous error were tested, and the key parameters influencing the response consistency of DCCTs were analyzed. The results show that the maximum peak instantaneous errors of all-fiber DCCTs and shunt DCCTs can meet ±5% limit requirement, meeting the demand for protection application in DC system. The delay time is the main factors affecting the maximum peak instantaneous error of DCCT. The longer the delay time is, the greater the maximum peak instantaneous error is, which may even exceed the limit value of ±5%. If necessary, the delay time of DCCTs participating in differential protection can be compensated. The research results provide a theoretical basis for preventing the malfunction of protection device caused by the inconsistent response characteristics of DCCTs in DC system.
Mechanical Fault Diagnosis of High Voltage Circuit Breaker based on Improved GSO-SVM Algorithm
Authors: Xia Xiaofei , Rao Xiajin , Su Yi , Lu Yufeng , Feng Bo 
Published: November 2021

Abstract
The vibration signal generated by the transmission and impact of mechanical components of circuit breaker has chaotic performances, which is difficult to be analysed by conventional signal processing methods. The phase space reconstruction of vibration signal is worked on, and the signal reconstruction parameters are calculated by mutual information method and Cao algorithm respectively. The vibration signal is reconstructed into a high-dimensional space, and its permutation entropy is calculated as a feature vector. Support vector machine (SVM) is used to identify the failure type of circuit breaker, and PSO improved GSA hybrid algorithm is used to optimize the parameters of SVM so as to obtain high recognition accuracy. The experiment is carried out with the measured vibration signal of the typical operation state of the circuit breaker. The results show that the characteristics of circuit breaker vibration signals can be extracted accurately with the combination of phase space reconstruction and permutation entropy. By using PSO-GSA-SVM, the fault types of circuit breakers can be identified quickly and effectively, and the problems of path distortion, energy leakage and mode overlap of existing diagnosis methods can be solved.
Automatic control of steam turbine two-valve mode under low load condition of coal-fired unit
Authors: Sun Zhe , Liu Chunhui , Li Ming , Zhao Junda , Xu Yao 
Published: November 2021

Abstract
In order to meet the requirements of deep peak regulation and rapid load change, coal-fired power stations are often under low load condition. Under low load conditions, there are serious throttling loss and poor economy of GV(Governor Valve).Here, based on the DEH sequence valve control of steam turbine, we innovatively propose the two valve operation mode and write the two valve mode control logic, which can automatically switch between the sequence valve and the two valve mode according to the valve flow command. On the premise of ensuring the stable operation of the unit, the purpose of reducing the throttle loss of the turbine can be achieved during the low load and peak regulation of the unit, and the fuel cost can be saved about 970,000 yuan per year. The control method is simple, reliable and practical, and can be widely used in thermal power units involved in peak regulation.
Research on the dynamic windproof and antiskid ability guarantee of port crane
Authors: Zhengqiu-Huang  , Weiping-Ouyang  , Lixin-Ren  , Jun-Qiu  
Published: November 2021

Abstract
This paper introduces the windproof and antiskid safety, types and working principles of dynamic windproof and antiskid devices in normal working conditions, analyzes the dynamic braking capacity and points out the deficiencies in the design, and puts forward relevant suggestion to provide basis for the subsequent evaluation of windproof and antiskid performance of port cranes.
The model relates to an substation inspection robot carrying a Unmanned Aerial Vehicle
Authors: Chen Dekai , Xue Boshui , Sun Ruofeng 
Published: November 2021

Abstract
A kind of substation inspection robot carrying unmanned aerial vehicle(UAV) was studied to solve the problems of complex indoor environment of substation, high intensity of manual inspection and low efficiency of traditional inspection method. Using robot mobile platform connected to the robot controller of ontology, the robot controller of ontology through wireless router and background monitoring system for information transmission and according to the background monitoring system control command control robot mobile platform preset in the transformer substation inspection lines and parking. Walking on the robot mobile platform is equipped with the UAV. Wireless information transmission between the UAV and the robot body controller, take-off and landing controlled by the robot body controller and the camera component on the UAV takes pictures of the equipment and instruments of the substation so as to complete the substation inspection work safely and reliably.
Design of Intelligent Power Saving Socket Based on Infrared and Mechanical Control
Authors: Li WenShuang , Liang XianMing , Wang WenHao , Wu YuXuan , Li XuRong 
Published: November 2021

Abstract
In order to effectively solve the problem of power waste caused by forgetting to cut off the power supply during standby, reduce the waste of power resources and improve the safety of electrical appliances, this paper designs an intelligent power saving socket which can be used in many scenarios. The design fully considers the cost of equipment, reliability and practicability, can greatly save electricity, so as to achieve the purpose of energy saving and emission reduction.
Numerical study on the effects of fin parameters on the charging process of PCM-based heat sink
Authors: Yang Yu , Pu Wenhao , Yao Haichen , Xing Xiaolong 
Published: November 2021

Abstract
In order to solve the heating problem of electronic devices, an optimal configuration of rectangular cavity straight fin phase change material (PCM) based heat sink is determined to extend the safe operating time in the charging process. With PCM-based heat sink as the object of research, a three-dimensional and transient melting model is constructed. The effects of fin number, height and thickness on phase change heat transfer process and natural convection are explored in depth, and the optimal configuration parameters of PCM-based heat sink are obtained. The results show that the configuration of 8 fins,15 mm in height and 2 mm in thickness is adopted as the optimal heat sink structure, with the longest safe operating time-1170 seconds. In the stable period of phase transition, the base temperature remains unchanged and the natural convection disturbance is strong. The short and dense fin arrangement can prolong the safe operating time of safety limit temperature 343K better.
The comparison of power capability between towed kite and horizontal axis fan
Authors: Yan Cuicui , Zhang Honglin 
Published: November 2021

Abstract
Airborne Wind Energy (AWE) mainly collects wind energy by tethered aircraft at a certain altitude. This paper discusses the recent development of AWE. The actuator disc theory is adopted to consider the influence of kites on wind flow obstruction. The difference of working mode between a horizontal-axis wind turbine (HAWT) and a crosswind kite power systems (CKPS) is compared, the power limit of HAWT and CKPS is calculated, and the reason of the limit power is analyzed. It is pointed out that CKPS has a wider range of flight and should be further analyzed and calculated rather than simply generalized by the system disk theory.
An Improved Chaotic Detection System for Metal Detectors
Authors: Hu Wenjing 
Published: November 2021

Abstract
This paper first applies a chaotic system-Duffing oscillator to a metal detector, and uses RHR algorithm to compute two Lyapunov characteristics exponents of the Duffing system. In this way, the two Lyapunov characteristic exponents can help to judge the Duffing system being chaotic or not quantitatively. And also help to get the threshold value more accurately. Then a simulation model of Duffing system fit for detectors is established by Matlab. Simulation results indicate that an suitable Duffing system can improve the sensitivity of a detector effectively.
Analysis of the influence of three-phase asynchronization recording on fault location of distribution network
Authors: Zhang Kai , Xu Mingming , Zhang Xinhui , Wang Supeng , Wu Wenhao 
Published: November 2021

Abstract
In order to improve the practical effect of the fault location technology, it is necessary to analyze the error caused by the three-phase asynchronization of the fault indicator recording. The influence of the three-phase recording asynchronization on the fault location of the distribution network is analyzed from the aspects of the start-up criterion, the error level of the zero-sequence current and the zero-sequence voltage. The simulation results show that fault location devices of different principles are affected differently by the asynchronization recording. In order to avoid mistake start-up of the fault location device, the change value should be used to construct the fault location start-up criterion. Meanwhile, the measurement accuracy of transient fault characteristics will be affected to a certain extent by the asynchronization of the fault indicator recording, but it has little effect on the reliability of fault location, and it can even make the fault characteristics more obvious after the single- phase fault occurs.
Modeling and Simulation of Fault Ride Through Performance of HPR1000 NPP in the UK Grid
Authors: Zhang Qingliang , Sun Hui , Zhai Changchun , Chen Xiaowei 
Published: November 2021

Abstract
This study focuses on the fault ride through capability of HPR1000 NPP in the UK grid and presents a Simulink-based modelling and simulation of the demonstration. The paper firstly introduces the fault ride through requirements of the UK grid, then describes the modelling process and analyses the simplified part accordingly, and finally analyses a three-phase ground fault with a duration of 140ms and a three-phase ground fault with a residual voltage of 85% and a duration of 180 seconds. The results show that the fluctuations of the plant under various fault ride through scenarios meet the requirements of the UK grid indicating the plant has fault ride through capability in the UK grid.
Research on Transmission and Offloading Scheme of MEC-IRS for Distribution Network Service
Authors: Xia Bingsen , Tang Yuanchun 
Published: November 2021

Abstract
the paper introduces IRS to assist offloading, and the propagation Environment can be intelligently changed by changing the reflection unit of the IRS, This article proposes an IRS-assisted MEC power distribution Internet of Things system, and studies the gain effect of IRS in the MEC system. In this system, the single antenna equipment can choose to unload a small part of its computing task to the edge computing node of the distribution Internet of things through the multi antenna access point with the help of IRS. In this paper, the delay minimization problem of the whole system is established, the DNQ reinforcement learning algorithm is used to solve the problem, which can effectively change the coverage of smart substations.
Low voltage abnormal user identification based on improved fish swarm algorithm
Authors: Kang Bing , Liu Chuan , Sun Min , Meng Tianqi , Zhou Jun , Wang Zongyao , Xu Zhihao 
Published: November 2021

Abstract
The power consumption readings of sub meter and total meter of distribution transformer of low-voltage users follow the law of conservation of energy. The meter power loss rate of abnormal low-voltage users must also be abnormal. This paper studies the solution of the meter power loss rate under the four abnormal power consumption scenarios of single (multi) user and full (partial) period. The traditional linear solution method has accurate identification effect for the abnormal power consumption scenario of full period, but it cannot identify the abnormal power consumption scenario of partial period. In this paper, an improved artificial fish swarm algorithm is proposed. By adjusting the fixed step to the adaptive step, the power loss rate of each sub meter is obtained, and the abnormal power users are pinpointed. The research results are verified by simulation examples on IEEE European Low Voltage Test Feeder. The results show that the improved artificial fish swarm algorithm in this paper can identify abnormal power users for the above four abnormal electric field scenarios. The algorithm provides a new alternative for the identification of abnormal low voltage users.
Simulation study on power system short circuit fault based on EMTP
Authors: Wang Lifang , Zhao Dewan , Huang Yue , Li Yangqing , Wang Yan 
Published: November 2021

Abstract
Electromagnetic transient simulation program EMTP is a common simulation commercial software in power system. It can effectively analyze and study power system. In this paper, EMTP is used to build the power system simulation model, and a variety of short-circuit faults in the power system are simulated and analyzed. The results show that the results accord with the actual theory, and the waveform can accurately and intuitively investigate the dynamic characteristics of power system faults. In addition, through the simulation comparison and analysis between different faults, it can be seen that the three-phase short-circuit fault is the most serious fault in the power system, which should be avoided in the actual production and life. This shows that EMTP is a powerful tool for power system simulation research, and provides a reference for the actual equipment selection requirements of the project.
Distributed communication power monitoring system based on big data technology
Authors: Liang Weiwei , Ma Wanli , Zhang Lixia , Fan Lei , Huo Meiru 
Published: November 2021

Abstract
Communication system has high quality requirements for power supply. Realizing the effective monitoring of power supply system is an important measure to improve power quality. In order to better and effectively manage massive power information in complex environment and avoid communication power failure, a design method of distributed communication power monitoring system based on big data technology is proposed. The system operation performance is proposed, and the software function and operation process of the communication power monitoring system are simplified by using big data technology to improve the system monitoring accuracy. Finally, the experiment shows that the distributed communication power monitoring system based on big data technology has significantly higher response speed and relatively lower monitoring error in the actual application process.
Health index prediction of dissolved gases in transformer oil based on statistical distribution model
Authors: Li Xiaogang , Liu Jiajia , Wang Xiaoguang , Wu Zhongyuan , Liu Chenyao 
Published: November 2021

Abstract
In this paper, dissolved gas analysis (DGA) and statistical distribution model (SDM) were used to predict the health index (HI) of dissolved gas in transformer oil. First, the individual DGA data are classified according to transformer ages ranging from 1 to 4 years. Then, representative fitting models were selected and extrapolated from 5 to 25 years. The inverse cumulative distribution function (ICDF) of the selected distribution model was used to calculate the single conditional parameter data from 5 to 25 years. Finally, the traditional scoring method is used to estimate the future HI value. The results show that DGA parameters can be expressed by exponential equation based on statistical model. The predicted values of DGA health index of transformer oil from 1 to 7 years were basically consistent with the calculated values, and the DGA score was 100 points. By the 20th year, the DGA score had dropped to 75, requiring timely monitoring. The research results can provide powerful data support and theoretical reference for transformer life prediction.
Comprehensive assessment and early warning of the risk of repeated power outages in distribution networks based on multi-source information fusion
Authors: Fan Fulai , Tang Xuesong , Wang Jianming , Xiao Yunkai , Yin Zhutao , Ye Kai , Ma Jianchao 
Published: November 2021

Abstract
In order to reduce the occurrence of power outages with repeated occurrences in the distribution network, this paper first defines the quantitative index of the concept of repeated occurrences. The FP-Growth data mining algorithm based on the optimal frequent itemset is proposed to obtain the correlation between the power outage factors. Combined with the fuzzy analytic hierarchy process, the main reasons for repeated power outages are obtained. The analytic hierarchy process combining subjective and objective weights is used to comprehensively evaluate the risk of repeated power outages in the distribution network. This paper realizes the early warning of power outage risk based on the comprehensive probability value of power outage. Finally, an actual distribution network in Chongqing is taken as an example to verify the practicability and effectiveness of the method.
Electronic Current Transformer Defects Statistical Analysis of Intelligent Substation
Authors: Liu Bin , Xie Xiaodong , Xiong Junjun , Deng Xiaopin , Huang Hua 
Published: November 2021

Abstract
In order to master operation status of the electronic current transformer(ECT), application investigation and defects statistical analysis were conducted on ECT of 110(66)kV~1000kV applied in smart substation of the State Grid Corporation of China(SGCC). The defect location, defect cause and defect type of ECT with different principles are analyzed. The results indicate that the defects of ECT are mainly concentrated in the acquisition unit, the defect rate is closely related to the reliability of electronic components, the technical level, production process and quality control of the manufacturer. In view of the typical defect analysis, the corresponding solution measures are put forward to provide reference for the subsequent research and application of ECT.