Fault Current Study of Inverter Interfaced Distributed Generators

  • Xiangping Kong State Grid Jiangsu Electric Power Company Research Institute, Nanjing, Jiangsu Province, China
  • Zhe Zhang State Key Laboratory of Advanced Electromagnetic Engineering and Technology (HUST), Wuhan
  • Xianggen Yin Electrical and Electronic Engineering, HUST
Keywords: power electronics, inverter-interfaced distributed generator (IIDG), dynamic response, fault current, analytical expression

Abstract

The fault current characteristics of inverter interfaced distributed generators (IIDGs) are very different from those of traditional synchronous generator. Prior to the fault current analysis of IIDG, a control strategy for low voltage ride-through (LVRT) of IIDG is proposed to meet the grid code. Then the fault current characteristics of IIDG are analyzed based on the study of dynamic responses of the inverter under conditions of symmetric faults and asymmetric faults. Meanwhile, the analytical expressions of the fault current of IIDG are obtained. Finally, the fault current characteristics of IIDG are validated with simulation studies.

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Author Biographies

Xiangping Kong, State Grid Jiangsu Electric Power Company Research Institute, Nanjing, Jiangsu Province, China

Xiangping Kong, the corresponding author, was born in Jiangxi, China, in 1988. He received the Ph.D. degree in electrical engineering from Huazhong University of Science and Technology (HUST), Wuhan, Hubei Province, China, in 2014. Currently, he is an engineer in State Grid Jiangsu Electric Power Company Research Institute, Nanjing, Jiangsu Province, China. His research interest is the protection of power grid with penetration of distributed generators and HVDC. Email: kongxphust@163.com.

Zhe Zhang, State Key Laboratory of Advanced Electromagnetic Engineering and Technology (HUST), Wuhan

Zhe Zhang received the Ph.D. degree in electrical engineering from HUST, Wuhan, China, in 1992. Currently, he is a professor in the College of Electrical and Electronic Engineering, HUST. He is affiliated with the State Key Laboratory of Advanced Electromagnetic Engineering and Technology (HUST), Wuhan 430074, Hubei Province, China. His interest is protective relaying. Email: zz_mail2002@163.com.

Xianggen Yin, Electrical and Electronic Engineering, HUST

Xianggen Yin received the Ph.D. degree in electrical engineering from HUST, Wuhan, China, in 1989. Currently, he is a professor in the College of Electrical and Electronic Engineering, HUST. His major areas include protective relaying and power system stability control. Email:xgyin@hust.edu.cn.

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Published
2015-07-01
Section
Articles