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检索条件"机构=Key Laboratory of Intelligent Dispatching and Control of Power Grid"

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Research on real-time simulation of wide area out-of-step system in CSG 4

Research on real-time simulation of wide area out-of-step sy...

引用

4th IEEE Conference on Energy Internet and Energy System Integration, EI2 2020

作者： Mao, Lifan Chang, Dongxu Liu, Ruicai Zhu, Yihua Guo, Hengdao Wu, Mingkang Hainan Power Grid Co. Ltd Power Dispatching and Control Center Haikou China Electric Power Research Institute China Southern Power Grid State Key Laboratory of HVDC Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9781728196060

In order to study the action characteristics of wide area out-of-step system in CSG, the real-time simulation study based on RTDS is carried out. In this paper, a test system based on the actual devices and the settings are constructed, and the modeling methods of the important measurement such as the power angle of tie line, Ucos φ oscillation curve and the voltage at the installation point of device are studied. The operation characteristics of wide area out-of-step system are fully verified by several serious single or multiple fault cases. The analysis of the simulation results shows that the wide area out-of-step system can meet the design requirements of splitting speediness, simultaneity and selectivity, and can solve the problems of late splitting in the south channel of Guangdong and Guangxi section, as well as the problem that the system cannot recover stability after splitting Guangdong and Guangxi, Guizhou and Guangxi section simultaneously. © 2020 IEEE.

关键词： Electric fault currents

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Development of coaxial discharge multi-output pusle trigger with fast rise time based on high voltage silicon reactor rectifier energy storage

Development of coaxial discharge multi-output pusle trigger ...

引用

Annual Meeting of CSEE Study Committee of HVDC and power Electronics (HVDC 2023)

作者： C. Fan L. Liu X. Xia Z. Zhong B. Feng T. Li M. Li Y. Su Y. Lu B. Li R. Pan State Key Laboratory of HVDC Electric Power Research Institute CSG Guang zhou People's Republic of China Guagnxi Key Laboraotry of Intelligent Control and Maintenance of Power Equipmnet Electric Power Research Institute of Gunagxi Power Grid Co. Ltd Gunagxi Nannnig People's Republic of China

It is of great significance to study the multi-output trigger that can work stably in strong electromagnetic environment and harsh working conditions for the trigger link of electromagnetic pulse simulation device. In this study, a five-channel output trigger platform with coaxial structure based on silicon stack rectification and capacitor charging and discharging is designed and built. The field simulation optimization check of key components of the structure is carried outd. The preliminary test shows that the output effect of the trigger device based on this design structure is good, and it can generate high-voltage pulses with leading edge less than 10ns and amplitude not less than 50kV under the condition of five outputs.

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Analysis of Fault Characteristics and Distance Protection Adaptability for VSC-HVDC-Connected Offshore Wind Farms

Analysis of Fault Characteristics and Distance Protection Ad...

引用

IEEE Asia power and Energy Engineering Conference (APEEC)

作者： Fang Peng Houlei Gao Weiying Miao Xinchi Feng Bin Xu Yitong Wu Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China Substation Maintenance Center State Grid Hangzhou Power Supply Company Hangzhou China State Grid Nanjing Power Supply Company Nanjing China School of Electrical Engineering Shandong University Jinan China

With the characteristics of low loss, low harmonic content and large transmission capacity, voltage source converter based high voltage direct current transmission (VSC-HVDC) has become the focus of the development for large-capacity and long-distance power transmission system connected with offshore wind farms. However, since the power supplies on both sides are controlled, the fault characteristics are changed, and the performance of the traditional distance protection is influenced. Based on the control strategy, the amplitude and phase angle of the equivalent positive and negative sequence impedances at the two sides of the transmission line are analyzed, and the current phasor expressions of the wind farm side and the VSC-HVDC side of the faulted line are derived. Then the adaptability of distance protection using power frequency component (DPPFC) of transmission line for VSC-HVDC-connected offshore wind farm is analyzed under different fault conditions. The results show that the amplitude and phase angle of the equivalent positive and negative sequence impedances of the wind farm and the VSC-HVDC system are affected by the control strategy of the converter and the fault conditions. The DPPFC is not suitable for VSC-HVDC-connected offshore wind farm system. The ability to avoid the effect of fault resistance of the DPPFC at the wind farm side gets worse. The simulation conducted by EMTP-RV verifies the effectiveness of the analysis.

关键词： Resistance Analytical models power transmission lines power transmission Wind farms Propagation losses power conversion

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Reliability Evaluation of Distribution grid Considering Flexible grid Connection of Distributed Photovoltaic 2

Reliability Evaluation of Distribution Grid Considering Flex...

引用

2nd International Conference on Electronics, Communications and Information Technology, CECIT 2021

作者： Li, Zecheng Sun, Yanying Feng, Chen State Grid Ningxia Electric Power Research Institute Yinchuan China School of Mechanical Electronic and Information Engineering Beijing100083 China Shandong University The Key Laboratory of Power System Intelligent Dispatch and Control Jinan China

ISBN: (纸本)9781665437578

Aiming at the problem that the flexible access of distributed photovoltaics to the distribution network affects its reliability, this paper establishes a model of the distributed photovoltaic output probability based on the typical output characteristics of distributed photovoltaics firstly. Subsequently, the power grid risk assessment indicators are determined to facilitate the quantification of distribution network risks, including voltage over-limit, power over-limit, and load loss risk indicators. Finally, a distribution network model containing distributed photovoltaic grid-connected is established on the MATLAB simulation platform, and the risk assessment of the distribution network containing distributed photovoltaic grid-connected is carried out. © 2021 IEEE.

关键词： Risk assessment

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Formulation of Fault Characteristics Based on Model Reduction in High Penetration Electronics System

Formulation of Fault Characteristics Based on Model Reductio...

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IEEE Asia power and Energy Engineering Conference (APEEC)

作者： Jiyao Han Zhuan Zhou Qichao Chen Fei Wang Xiaohui Wang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education School of Electrical Engineering Shandong University Jinan China State Grid Xinjiang Electric Power Co. Ltd Urumqi China State Grid Economic and Technological Research Institute CO. Ltd State Grid Corporation of China Bejing China

In the power grid, with the extensive applications of power electronic equipment, the dimension and complexity of the power system model are greatly increased. Compared with the traditional power grid, the number of components in the high proportion electronic power grid system is large and the interactions between them are complex. In case of fault, it is necessary to comprehensively consider state variables. To solve the above problems, a fault feature extraction method based on balanced truncation model reduction algorithm is proposed, and the feasibility of the fault feature extraction is verified by time-domain simulation in a photovoltaic grid connected system model. This method aims to recombine the original variables into a group of new independent comprehensive variables, and then take out a few comprehensive variables according to the actual needs to reflect the fault information in the original system as much as possible.

关键词： Linear systems Photovoltaic systems Electrical engineering Spontaneous emission Feature extraction Reduced order systems power grids

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Research on A New Connection Mode of 10kV Medium Voltage Cable Intermediate Joint 8

Research on A New Connection Mode of 10kV Medium Voltage Cab...

引用

8th International Conference on Energy Materials and Electrical Engineering, ICEMEE 2022

作者： Liu, Bohan He, DaJiang Chen, Lingxi Shu, You Cai, Yaoxing Duan, Tao School of Physics Electronics and Intelligent Manufacturing Huaihua University Hunan Huaihua418000 China Huaihua University Hunan Huaihua418000 China Key Laboratory of Intelligent Control Technology for Wuling-Mountain Ecological Agriculture in Hunan Province Hunan Huaihua418000 China Academy of Fine Arts &art Instute Huaihua University Hunan Huaihua418000 China Preparation Technology of Polyvinyl Alcohol Fiber Materials Hunan Engineering Laboratory Hunan Huaihua418000 China State Grid Huaihua Power Supply Company Hunan Huaihua418000 China

ISBN: (纸本)9781510663220

Due to the on-site production of the middle joint of the cable, there are problems of loose contact, obvious heat generation and easy failure at the joint. In order to ensure the safe and stable operation of power cables and reduce the harm caused by the accidents of power cable intermediate joint to the power grid, this paper studies a preliminary design scheme of plug-in intermediate joint in view of the fact that there are many accessories of traditional power cable intermediate joint, the operation is cumbersome, and there are certain requirements for the technical level of installers. This scheme is easy to operate and requires less on-site process for operators. In this paper, a new connection mode of 10kV medium voltage cable intermediate joint is designed. The intermediate joint device is pre-made. the handle of the device is pulled open, the cable is inserted, and the connection is totally competed by closing the handle, which speeds up the recovery speed, improves the work efficiency, ensures the safe and stable operation of power cables, reduces the power system faults caused by the connection faults of intermediate cables, and provides a reliable guarantee for the safe operation of medium and low voltage distribution networks in China. © 2023 SPIE.

关键词： Electric power distribution

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Robustness Trend of power Transmission and Transformation Monitoring System based on Multidimensional Data Anomaly Detection Algorithm

Robustness Trend of Power Transmission and Transformation Mo...

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Automation, Computing and Renewable Systems (ICACRS), International Conference on

作者： Wei Zhang Yubo Zhang Chengwei Huang Yubin Feng Electric Power Research Institute of Guangxi Power Grid Co. Ltd. NanNing Guangxi Key Laboratory of Intelligent Control and Maintenance Power Equipment Nanning Power Supply Bureau of Guangxi Hezhou Power Grid Co. Hezhou

ISBN: (纸本)9781665460859

A data anomaly detection method based on fuzzy isolated forest algorithm is proposed. By selecting some valuable attributes and building them into isolated forests, starting from multiple dimensions, the membership degree of the detection results of each dimension attribute is judged. The influence of several key factors on CPPS was investigated. The proposed weak interdependence model considers protection mechanisms such as realistic redundancy backup, which makes the model more close to the actual system operation. Great trend of change. Subsequently, the strategy of edge-break protection is further proposed to improve the robustness of the power grid, and the simulation results are shown by computer graphics, which show that it has practical value for the analysis of optimal control systems with accurate mathematical models.

关键词： Computational modeling Systems operation Poles and towers power transmission Forestry Market research Robustness

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Deep neural network based interpolation of sparse samples for time-dense power load forecasting

Deep neural network based interpolation of sparse samples fo...

引用

International Conference on Computer Engineering and Applications (ICCEA)

作者： Bo Li Ruifeng Zhao Jiangang Lu Kuo Xin Jinhua Huang Guanqiang Lin Jinrong Chen Xueyue Pang Shunxin Wu Electric Power Dispatching and Control Center of Guangdong Power Grid Co. Ltd. Guangzhou Guangdong China Electric Power Dispatching and Control Center of China Southern Power Grid Co. Ltd. Guangzhou Guangdong China Electric Power Research Institute of Guangdong Power Grid Co. Ltd. Guangzhou Guangdong China Huizhou Power Supply Bureau of Guangdong Power Grid Co. Ltd. Huizhou Guangdong China Foshan Power Supply Bureau of Guangdong Power Grid Co. Ltd. Foshan Guangdong China China Energy Engineering Group Guangdong Electric Power Design Institute Co. Ltd. Guangzhou Guangdong China State Key Laboratory of Power Equipment & System Security and New Technology School of Electrical Engineering Chongqing University Chongqing China

Large amount of power load data with high-sampling rate plays a crucial role in the training of time-dense power load forecasting network. However, in many cases, there is a large amount of data with low-sampling rate, which can't directly train a time-dense forecasting network. Therefore, this paper proposes a deep learning based dataset interpolation method, which uses the available high-sampling rate power load datasets to train a dataset interpolation network, then interpolates the low--sampling rate datasets with trained network to obtain high-sampling rate datasets, and finally uses the interpolated datasets for time-dense forecasting network training. The results show that the data obtained based on the method proposed in this paper fits the ground-truth closer than the traditional interpolation, and the results of the network trained based on this dataset are more accurate in the subsequent forecasting tasks.

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power Outage Prediction of Flood Disaster Based on Random Forest Classification

Power Outage Prediction of Flood Disaster Based on Random Fo...

引用

Energy, Electrical and power Engineering (CEEPE), International Conference on

作者： Shan Li Xianhao Lu Yangjun Zhou Longjun Wang Peng Zeng Chenying Yi Guangxi Key Laboratory of Intelligent Control and Operation and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd Nanning China Electric Power College South China University of Technology Guangzhou China Guangxi Power Grid Equipment Monitoring and Diagnosis Technology Innovation Center Electric Power Research Institute of Guangxi Power Grid Co. Ltd Nanning China School of Electrical Power Engineering South China University of Technology Guangzhou China Guangxi Meteorological Disaster Prevention Center Nanning China

ISBN: (数字)9798350375794

ISBN: (纸本)9798350375800

The flood disaster has caused extensive damage and economic losses worldwide, and the power outage caused by it is particularly common and has an important impact. Therefore, it is of great significance to use effective methods to predict power outage in advance of flood disaster. A method of using random forest classification to predict the probability of power outage in flood disaster is proposed. Firstly, supervised learning, decision tree and ensemble learning methods are introduced as the basis of random forest. Secondly, the basic principle of random forest is elaborated in detail. Thirdly, based on the random forest classification method, according to the steps of feature selection, model training and model evaluation, a flood disaster power outage prediction model is constructed. Finally, a set of data is used to verify and analyze the model, and the performance and accuracy of the model are evaluated. The results show that this method has high accuracy in predicting the probability of power outage in flood disaster, and provides an effective strategy for the prediction of power outage in flood disaster in advance, which has important practical application value.

关键词： Analytical models Accuracy power measurement Disasters Prevention and mitigation Predictive models Data models

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The modular design and verification of a 110kV circuit breaker 2

The modular design and verification of a 110kV circuit break...

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2023 2nd International Conference on power System and power Engineering, PSPE 2023

作者： Su, Yi Pan, Shaoming Zhang, Wei Wang, Jialin Zhang, Lei Meng, Ning Li, Weiguo Gao, Xingyu Gong, Ruilei Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Nanning530023 China Guangxi Transmission & Substation Construction Co. Ltd. Guangxi Nanning530031 China Maintenance & Test Centre Csg Ehv Power Transmission Company Guangdong Guangzhou510663 China School of Mechanical and Electrical Engineering Guilin University of Electronic Technology Guangxi Guilin541004 China Shandong Taikai High Voltage Switchgear Co. Ltd Shandong Tai'an271000 China

The reliability of circuit breakers is of great importance for the safe operation of the power grid. Most failures of the circuit breakers were caused by their operating mechanism, which often contains a lot of components. What is more, the secondary connections of the circuit breakers are also complicated. The lack of modular design of domestic circuit breakers now limits the development of reconditioning. To improve the reliability and reduce the maintenance time of the circuit breaker, research on the modular design of a 110 kV circuit breaker has been carried out and the verification was also conducted. © Published under licence by IOP Publishing Ltd.

关键词： Electric circuit breakers

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