发电技术 ›› 2019, Vol. 40 ›› Issue (1): 22-27.DOI: 10.12096/j.2096-4528.pgt.18192

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DG接入对微电网电流保护的影响

丁婧1(),王欣1,郑淑文2,陈宇3,孙仕奇1   

  1. 1 国网湖北省电力有限公司鄂州供电公司, 湖北省 鄂州市 436000
    2 国网河南省电力有限公司平顶山供电公司, 河南省 平顶山市 467000
    3 湖北华电西塞山发电有限公司, 湖北省 黄石市 435001
  • 收稿日期:2018-11-05 出版日期:2019-02-28 发布日期:2019-02-26
  • 作者简介:丁婧(1992),女,硕士,研究方向为电力系统继电保护, 503673557@qq.com

The Impact of DG Access on Microgrid Current Protection

Jing DING1(),Xin WANG1,Shuwen ZHENG2,Yu CHEN3,Shiqi SUN1   

  1. 1 State Grid Hubei Electric Power Co., LTD., Ezhou Power Supply Company, Ezhou 436000, Hubei Province, China
    2 State Grid Henan Electric Power Co., LTD., Pingdingshan Power Supply Company, Pingdingshan 467000, Henan Province, China
    3 Hubei Huadian Xisaishan Power Generation Supply Company, Huangshi 435001, Hubei Province, China
  • Received:2018-11-05 Published:2019-02-28 Online:2019-02-26

摘要:

分布式电源(DG)接入微电网后,微电网由单源变为多源系统,会改变原有网络的潮流分布以及故障短路电流流向,造成原有保护的灵敏度下降,出现误动拒动等现象。分析DG接入位置与接入容量的不同对微电网保护的影响,并在PSCAD软件上搭建微电网模型,接入DG,验证DG接入位置不同以及接入容量不同对微电网电流保护的影响。

关键词: 分布式电源, 微电网, 电流保护

Abstract:

When distributed generator (DG) is connected to the microgrid, the microgrid will change from single source system to multiple source system, which will change the power flow distribution and fault short-circuit current flow of the original network, the sensitivity will decrease, and the phenomenon of false rejection will occur. In this paper, the influence of DG on the protection of microgird is analyzed, and the model is built on the PSCAD. The effect of DG on the protection of microgird is verified.

Key words: distributed generator, microgird, current protection