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.
引用
收藏
页码：78 / 84
页数：6
相关论文
共 22 条
  • [1] Huang W., Gao Y., Zhang Y., Evaluation of ultimate capacity for distributed photovoltaic access distribution network considering uncertainty, Power System Protection and Control, 46, 14, pp. 9-16, (2018)
  • [2] Li Y., Dong C., Low-carbon active distribution network planning based on two bionic algorithms, Electric Power, 50, 4, pp. 66-70, (2017)
  • [3] Li R., Li Y., Guo W., Et al., Simulation analysis of the influence of distributed generation on the reliability of distribution network, Power System Technology, 40, 7, pp. 2016-2021, (2016)
  • [4] Zhan H., Wang C., Wang Y., Et al., Relay protection coordination integrated optimal placement and sizing of distributed generation sources in distribution networks, Power and Energy Society General Meeting, IEEE, (2016)
  • [5] Chen C., Chen W., Li J., Automatic defect locating method for relay protection systematic testing, Electric Power, 51, 5, pp. 10-16, (2018)
  • [6] Gao L., Lang C., Xia N., Automatic defect locating method for relay protection systematic testing, Power System Protection and Control, 45, 18, pp. 143-149, (2017)
  • [7] Lin X., Lu Y., Wang L., New current protection scheme considering distributed generation impact, Automation of Electric Power Systems, 32, 20, pp. 50-56, (2008)
  • [8] Li M., Wang H., Zhang M., An adaptive protection scheme for meshed distribution system with DG, Electric Power Science and Engineering, 5, pp. 62-66, (2014)
  • [9] Guo Y., Jiang J., Fan C., Et al., Improved inverse-time over-current protection for distribution network, Electric Power Automation Equipment, 35, 10, pp. 45-50, (2015)
  • [10] Wu Z., Zhao S., Hu M., Et al., Branch directional variation protection of AC microgrid, Proceedings of the CSEE, 32, 25, pp. 158-166, (2012)
123