Effect of distributed generation on relay protection of distribution network and comprehensive improvement of protection scheme

被引：0
|
作者：
Xie M. [1 ]
Wang T. [1 ]
Xu J. [2 ]
Shao Q. [1 ]
Yu Y. [1 ]
Zhang W. [1 ]
机构：
[1] State Grid Anhui Electric Power Co., Ltd., Hefei
[2] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2019年 / 47卷 / 19期
基金：
中国国家自然科学基金;
关键词：
Augmented current; Distributed generation; Distribution network; Relay protection; Voltage factor correction;
D O I：
10.19783/j.cnki.pspc.181524
中图分类号：
学科分类号：
摘要：
With the access of large-scale distributed generators, the operation mode, power flow characteristics and short-circuit current of distribution network will change greatly, which has a great impact on the reverse-time over-current protection of distribution network lines. Based on the traditional inverse-time current protection of power system, this paper analyses the mechanism and characteristics of the influence of the auxiliary current of distributed generation on the inverse-time protection of distribution network when the fault occurs. And a comprehensive improved reverse-time over-current protection scheme using voltage factor correction is proposed. It meets the requirements of relay protection under the access of distributed generation. A simulation model is established in PSCAD/EMTDC environment to verify the effectiveness of the selectivity and speed of the proposed scheme. © 2019, Power System Protection and Control Press. All right reserved.
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页码：78 / 84
页数：6
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