基于PSCAD/EMTDC的低压合环电流仿真

doi:10.11930/j.issn.1004-9649.2016.12.021.05

中国电力 ›› 2016, Vol. 49 ›› Issue (12): 21-25.DOI: 10.11930/j.issn.1004-9649.2016.12.021.05

基于PSCAD/EMTDC的低压合环电流仿真

李鹏¹，李徽胜¹，王睿¹，方兵华²，陈丽丹³

1. 广州南方电力集团电器有限公司，广东广州 510285;
2. 广州供电局有限公司，广东广州 510075;
3. 华南理工大学广州学院，广东广州 510800

收稿日期:2016-08-05 出版日期:2016-12-20 发布日期:2016-12-29
作者简介:李鹏（1985—），男，重庆人，硕士，从事配电自动化设备研发工作。E-mail: 306413418@qq.com
基金资助:
中国南方电网有限责任公司科技项目（K-GZM2014-004）

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

LI Peng¹, LI Huisheng¹, WANG Rui¹, FANG Binghua², CHEN Lidan³

1. Guangzhou Southern Power Group Electric Apparatus Co., Ltd., Guangzhou 510285, China;
2. Guangzhou Power Supply,

Received:2016-08-05 Online:2016-12-20 Published:2016-12-29

摘要/Abstract

摘要： 随着用户对供电可靠性要求不断提高，低压配电网的供电方式成为未来电网供电可靠性及安全性的重要因素；通过设计双公变房低压母联、邻近台区配电变压器间低压母联和配电变压器低压干线联络等供电方式，应用PSCAD/EMTDC软件建立仿真模型，改变低压合环点的上级电源、配电变压器、负荷等设备和运行参数；仿真得到低压合环电流的曲线和数据，分析合环电流大小的影响因素，合环两侧电压相角差对合环电流的影响很大；在合环冲击电流未超过线路保护装置整定的速断保护启动电流，合环稳态电流未超过线路的热稳限值，环路上的所有设备不过载前提下可进行低压合环转电操作。

关键词: 低压配电网, 合环电流, 低压转供电, PSCAD/EMTDC

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

中图分类号:

TM732

李鹏，李徽胜，王睿，方兵华，陈丽丹. 基于PSCAD/EMTDC的低压合环电流仿真[J]. 中国电力, 2016, 49(12): 21-25.

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

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基于PSCAD/EMTDC的低压合环电流仿真

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

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基于PSCAD/EMTDC的低压合环电流仿真

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

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