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检索条件"机构=State Key Laboratory of Smart Grid Protection and Operation Control"

共 395 条记录，以下是171-180 订阅

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A Method for Locating Ground Faults in Distribution Network Based on Change of Longitudinal Current

A Method for Locating Ground Faults in Distribution Network ...

引用

2021 International Conference on control Science and Electric Power Systems, CSEPS 2021

作者： Lei, Xia Hai, Wu Guo, Hu Song, Hu State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Nanjing211106 China NARI Technology Development Co. Ltd. Jiangsu Nanjing211106 China

ISBN: (纸本)9781665426183

A new method for locating ground faults in distribution network was introduced by analysis of the characteristics of the ground fault for the isolated neutral system. The method by comparing the longitudinal current change of the adjacent measurement point to judge the ground fault location, and has verify it by building the simulation model on the PSCAD/EMTDC. The results show that the method has a strong ability of resistance to transition resistance. The specific implementation scheme was given based on the fault indicator which is widely used in distribution network at present. © 2021 IEEE.

关键词： Location

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Research on key Technologies of Line Differential protection Based on 5G Communication 6th

Research on Key Technologies of Line Differential Protection...

引用

6th PURPLE MOUNTAIN FORUM on smart grid protection and control, PMF2021

作者： Zheng, Xiaojiang Yao, Gang Wu, Tonghua Teng, Xianliang Hong, Feng Wang, Weiwei State Key Laboratory of Smart Grid Protection and Control Jiangsu Nanjing211106 China Jiangsu Nanjing211106 China NARI Technology Co. Ltd Jiangsu Nanjing211106 China

ISBN: (纸本)9789811671555

With the advanced 5G communication technology and the wireless communication environment of 5G communication network with high bandwidth, low delay and high reliability, line differential protection based on 5G communication has become the development trend of MV (Medium Voltage) and LV (Low Voltage) distribution network protection. This paper provides an overall architecture scheme of line differential protection based on 5G communication to further explain the characteristics of 5G network, and aiming at the problem of delay jitter existing in 5G network, presents a sampling point sequence number synchronization method based on absolute time-marker of external clock to analyze data encapsulation, interaction and traffic consumption of bilateral differential protection, and the corresponding technical solutions, and at last, it proposes a processing mechanism of protection device in dealing with clock loss and data anomaly, which provides a complete technical route for line differential protection based on 5G communication, facilitates the large-scale application of longitudinal differential protection in the closed-loop operation of MV and LV power network, and ensures that the requirements of quickness and selectivity can be met in the traditional non-unit protection of MV and LV power network, so as to improve the reliability level of power network. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： 5G mobile communication systems

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Design and Application of Load Side Resources Participating in Frequency Modulation Auxiliary Service Market Mechanism in China 7

Design and Application of Load Side Resources Participating ...

引用

7th Asia Conference on Power and Electrical Engineering, ACPEE 2022

作者： Xu, Fan Su, Yijing Huang, Qihang Chang, Li Lu, Min Yang, Kan State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Nanjing China State Grid Zhejiang Electric Power Co. Ltd Hangzhou China Economic Research Institute of State Grid Zhejiang Electric Power Co. Ltd Hangzhou China

ISBN: (纸本)9781665418195

At present, the generation units in the frequency modulation market in China has entered the market-oriented operation, while the market-oriented operation of the load side resources has not been started. This paper presents a mechanism design and system application of load side frequency modulation resources participating in frequency modulation auxiliary service market. Firstly, it analyzes the key mechanisms such as declaration, transaction clearing and settlement in the frequency modulation market. Secondly, the operation mechanism of load side regulation resources after participating in frequency modulation market and the operation interaction process with power market are designed. Then, build the clearing model of load side resources participating in frequency modulation auxiliary service market, and jointly clear the power market and frequency modulation market. Taking the provincial power system of frequency modulation auxiliary service market as an example, the relationship between frequency modulation auxiliary service market system and other systems is discussed. Through the market mechanism, the comprehensive optimization operation of the power grid is carried out, and the reserve capacity of the frequency modulation is effectively configured so as to achieve the goal of the lowest operating cost. © 2022 IEEE.

关键词： Frequency modulation

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Study on regional hydropower accommodation and improvement measures in power system

Study on regional hydropower accommodation and improvement m...

引用

2017 IEEE Conference on Energy Internet and Energy System Integration, EI2 2017

作者： Li, Zewen Bie, Zhaohong Han, Zifen Li, Xiaofei Zhi, Yong Zhang, Yankai State Key Laboratory of Electrical Insulation and Power Equipment Shaanxi Key Laboratory of Smart Grid Xi'an Jiaotong University Xi'an China State Grid Gansu Electric Power Company Lanzhou China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China Electric Power Research Institute State Grid Gansu Electric Power Company Lanzhou China

ISBN: (纸本)9781538614273

Hydropower is an important part of energy internet, as a principal type of sustainable energy. The promotion of hydropower may help to improve the power source structure and improves the safety, reliability and flexibility of the power system. However, the increasing congestion of the regional hydropower accommodation limits the wider use of hydropower. In this paper, an index system is developed to assess the regional hydropower accommodation. On this basis, an analysis method is proposed to find out the specific reasons of the congestion and the improvement measures by analyzing the relevance of source-load characters and delivery flowgate. The method is proved to be universal and practical through a case study in Western China where the hydropower is the dominant energy. The study is capable to provide necessary suggestions to the safety operation and planning of regional power system and has engineering application value. © 2017 IEEE.

关键词： Internet of Energy

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smart substation network quality monitoring and fault prediction

Smart substation network quality monitoring and fault predic...

引用

2021 International Conference on Power Electronics and Power Transmission, ICPEPT 2021

作者： Li, Chao Peng, Qi Wang, Dehui Luo, Linglu Zuo, Huanhuan NARI Group Corporation State Grid Electric Power Research Institute Nanjing211006 China NARI Technology Co. Ltd. Nanjing211006 China State Key Laboratory of Smart Grid Protection and Control Nanjing210061 China

The smart substation communication network is the basis for information sharing of various devices in the substation. Its operation status has an important impact on the safe operation of the substation and even the power grid. Therefore, real-time status monitoring of the smart substation communication network is becoming more and more important. Aiming at the problems of single dimension, insufficient real-time performance and manual fault analysis in existing substation communication network state monitoring technology, this paper proposes a method of smart substation communication network state monitoring and fault prediction based on network communication quality. This paper uses switch ACL technology and coloring technology to obtain communication quality indexes such as bandwidth utilization, delay, and packet loss rate in real time;based on a multi-dimensional evaluation algorithm, a comprehensive evaluation model of network communication quality is constructed;the model of the relationship between abnormal network communication quality and failures is established. Finally, real-time monitoring of network communication quality and fault prediction are realized. The application analysis in a typical 110 kV substation shows that this method can effectively evaluate the network communication quality and accurately predict failures, and can guide operationer and maintenaner to quickly restore the normal operation of the communication network. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Telecommunication networks

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Research on Reliability Improvement Scheme of Network in smart Substation 1

引用

International Top-Level Forum on Engineering Science and Technology Development Strategy and 5th PURPLE MOUNTAIN FORUM on smart grid protection and control, PMF2020

作者： Shen, Bing Lu, Zhihao Lv, Hang Yang, Gui Li, Li State Grid Shanghai Municipal Electric Power Company Shanghai200122 China State Key Laboratory of Smart Grid Protection and Control Nanjing Jiangsu211106 China NR Electric Co. Ltd. Nanjing Jiangsu211106 China

ISBN: (数字)9789811597466

ISBN: (纸本)9789811597459

The data sharing based on process level network is the development trend of the digitalization of the secondary circuit in smart substation. However, abnormal problems of data transmission such as network storms bring certain hidden dangers to the safe and stable operation of the secondary equipment. In this paper, the main problems affecting the reliability of data transmission are analyzed, and the message management technology based on data flow control is proposed, which can effectively improve the reliability of data transmission. Aiming at the problem of cross-network data exchange, a solution based on cross-network port flow control is also proposed. © 2021, Springer Nature Singapore Pte Ltd.

关键词： Flow control

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Research and Application of Data on Demand Penetration Retrieval Based on DL/T860CMS Standard 8

Research and Application of Data on Demand Penetration Retri...

引用

8th International Conference on Energy System, Electricity, and Power, ESEP 2023

作者： Zeng, Jincheng Tan, Zhijun He, Mingyi Tian, Hui Gong, Shaoqi Wu, Yongyi Nari Group Corporation State Grid Electric Power Research Institute Nanjing211106 China Nari Technology Co. Ltd. Nanjing211106 China State Key Laboratory of Smart Grid Protection and Control Nanjing211106 China

ISBN: (数字)9781510679801

ISBN: (纸本)9781510679795

To address the continuous growth of equipment scale and the number of measurement points in autonomous and controllable intelligent substations, while existing data collection strategies, equipment modeling methods, and data transmission dimensions cannot meet the requirements of panoramic monitoring and deep data mining analysis for the new-generation of substation centralized monitoring system, this paper proposes a data penetration and retrieval method based on DL/T860 CMS standard. This article introduces the background and technical advantages of the DL/T860 CMS standard, as well as the overall process of on-demand access. It also designs the overall architecture, and discusses in detail the key technologies involved in file access, dynamic dataset access, and remote process *** application results of on-site operation of multiple centralized control systems in Jiangsu, Shandong, Anhui, and other provinces show that on-demand penetration and retrieval services provide reliable technical support for centralized monitoring of substations, effectively improving the monitoring level of the centralized control system regarding the primary and auxiliary equipment of the substation. © 2024 SPIE.

关键词： Data mining

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Analysis of Emergency control Strategy of System Frequency under Large Power Disturbance 7

Analysis of Emergency Control Strategy of System Frequency u...

引用

7th Asia Conference on Power and Electrical Engineering, ACPEE 2022

作者： Guang, Xu Jiahe, Yang Xuelian, Wu Zhonghui, Wan Hui, Huang Fusuo, Liu Nari Group Corporation/State Grid Electric Power Research Institute State Key Laboratory of Smart Grid Protection and Control Nanjing China Nari Group Corporation/State Grid Electric Power Research Institute Power Grid Analysis and Consulting Department Nanjing China State Grid Electric Power Research Institute Nanjing China

ISBN: (纸本)9781665418195

When large-power disturbances occur in power grids, the system frequency will shift greatly, and there may be obvious spatial-temporal distribution characteristics. By analyzing the single-machine frequency response characteristics of the system and the frequency difference between the two systems, a system frequency analysis model considering nonlinear factors under large frequency difference is proposed to estimate the maximum offset of the system frequency. It is proposed to reduce the maximum frequency offset and reduce the frequency spatiotemporal distribution characteristics by selecting the coordination method of emergency control at different locations at different times, thus improving the safety and stability of the power grid. © 2022 IEEE.

关键词： Electric power transmission networks

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Research on Man-Machine Service Reliability of New Generation Power System 3

Research on Man-Machine Service Reliability of New Generatio...

引用

2021 3rd International Conference on Electronic Engineering and Informatics, EEI 2021

作者： Yin, Xia Li, Lulu Lv, Zhimeng Yan, Zhen Xu, Hua Zhao, Kun Huang, Kun Nari Group Corporation State Grid Electric Power Research Institute Nanjing211106 China Nari Technology Co. Ltd. Nanjing211106 China State Key Laboratory of Smart Grid Protection and Control Nanjing211106 China

With the rapid growth of smart grid dispatching business scale, the traditional fat client mode power system has a large degree of business coupling, which limits the power grid dispatching business. But the lightweight man-machine cloud terminal and man-machine service framework have greatly reduced the coupling degree of the grid dispatching system business. The appearance of man-machine service reduces the development cost of client, and makes the unified browsing of multi system and multi terminal equipment easier. However, how to ensure the reliability and stability of man-machine interaction service is a question worthy of discussion. How to adapt to the interaction of a lot of clients and to adapt to the requests of different clients put forward higher requirements for man-machine service. This article describes the man-machine service architecture and key technologies to ensure reliability, introduces technologies such as load balancing and thread pools that adapt to the characteristics of power grid human-computer interaction, introduces in detail the distributed job scheduling management mechanism within the man-machine service, and describes the standardized request and return result of man-machine service. Finally, through sample testing and on-site operation, demonstrate the reliability of the man-machine service. © Published under licence by IOP Publishing Ltd.

关键词： Reliability

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Research on Hybrid Active Power Filter and Its control and protection System for LCC-HVDC

Research on Hybrid Active Power Filter and Its Control and P...

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IEEE Joint International Information Technology and Artificial Intelligence Conference (ITAIC)

作者： Wujie Chao Liyu Dai Junwei Huang Mingquan Chen State Grid Fujian Electric Power Research Institute Fuzhou China Fujian Key Laboratory of Protection and Operation Control for Smart Grid Fuzhou China

Filters are key equipment in LCC-HVDC projects. It filters out characteristic harmonics generated by the converter and prevents the effect of harmonics generated by converters on the AC power grid. Currently, most DC transmission projects use passive filters. The first use of hybrid active power filters in the Fujian Guangdong DC interconnection project º This paper introduces the application framework, theory, control and protection system design of hybrid active power filters in LCC-HVDC projects.

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