Study on the Theory of Partition Power Supply of 500 kV Received Power Grids Based on Partition Equivalent Models

doi:10.11930/j.issn.1004-9649.2016.02.122.06

Abstract

Abstract: The short circuit problem caused by electromagnetic loop network emerges with the development of power grid. A reasonable grid structure is important to limit short circuit current of a power grid. Through analysis on several partition structure of received power grids of different areas, typical received power grid partition model of single 500 kV station, two 500 kV stations and three chain-link or circular 500 kV stations are built based on equivalent circuit theory. To verify basic accuracy of proposed model and method, the short-circuit current of typical power grid partition models at different positions are calculated. Comparison is made between calculation results and actual measurement. Considering power plant access, theoretical principles of received power grid partition is proposed. It is advised that 500 kV power grid can be partitioned by 2~3 stations and 4~6 transformers of 500 kV. Additional serial reactance can be used if the short-circuit current does not meet operation requirements under advised partition principles.

Key words: partition power supply model, short-circuit current, stability analysis, partition principle

CLC Number:

TM712

LAN Haibo, FAN Xinqiao, ZHANG Jun, ZHANG Wenchao, DU Yanling, ZHAO Feng, WANG Sai, WU Xun. Study on the Theory of Partition Power Supply of 500 kV Received Power Grids Based on Partition Equivalent Models[J]. Electric Power, 2016, 49(2): 122-127.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.02.122.06

https://www.electricpower.com.cn/EN/Y2016/V49/I2/122

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