Simulation of Closed Loop Current for Low Voltage Power Distribution Network Based on PSCAD/EMTDC

doi:10.11930/j.issn.1004-9649.2016.12.021.05

Abstract

Abstract: With increasing power supply reliability requirement, low voltage distribution network will be an important factor in the future of power supply reliability and security constraints. Three power supply schemes, bus connection mode for double public transformer room, neighborhood distribution transformer and connection between two main cables from different distribution transformer, are designed. Simulation model of closed loop operation for low voltage is established by using PSCAD/EMTDC. Parameters of superior power, low voltage distribution transformers and load are changed to obtain closed loop current in different cases. Various factors related to closed loop current are analyzed. It is found that voltage phase difference between both sides has great influence on the current loop. Loads can be switched by loop closing operation when all the equipments and lines on the loop are not overloaded and closed loop impulse current is not exceeding auto-boot current value of quick-break protection.

Key words: low voltage distribution grid, closed loop current, closed loop power supply, PSCAD/EMTDC

CLC Number:

TM732

LI Peng, LI Huisheng, WANG Rui, FANG Binghua, CHEN Lidan. Simulation of Closed Loop Current for Low Voltage Power Distribution Network Based on PSCAD/EMTDC[J]. Electric Power, 2016, 49(12): 21-25.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.12.021.05

https://www.electricpower.com.cn/EN/Y2016/V49/I12/21

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