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33 34 Vol.33 No.34 Dec.5, 2013
2013 12 5 Proceedings of the CSEE ©2013 Chin.Soc.for Elec.Eng. 65
0258-8013 (2013) 34-0065-10 TM 711 A 470·40
(() 430074)
Study on Fault Current Characteristics and Fault Analysis Method of Power Grid With
Inverter Interfaced Distributed Generation
KONG Xiangping, ZHANG Zhe, YIN Xianggen, WANG Fei, HE Maohui
(State Key Laboratory of Advanced Electromagnetics Engineering and Technology (Huazhong University of Science and
Technology), Wuhan 430074, Hubei Province, China)
ABSTRACT: In order to meet the grid code of distributed
generation, a control strategy for low voltage ride through
(LVRT) of inverter interfaced distributed generation (IIDG) is
proposed. Based on it, the dynamic responses of inverter
controller and fault current characteristics of IIDG are studied
under conditions of symmetric fault and asymmetric fault. 0
Besides, the calculation model of the fault current of IIDG is
established. Moreover, the fault analysis method for the
distribution network with penetration of IIDGs is analyzed.
Digital simulation results validate the correctness of the
theoretical analysis results. The research results are helpful to
improve the LVRT capability of IIDG and study the fault
characteristics of the power grid with IIDGs. The research [1-2]
results can also provide reference for principle study and
performance evaluation of the relaying protection which is
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