Double Criteria Feeder-Selection Method for Single-Phase Ground Fault of Resonant Grounding System Based on Multi-State Components

Yixi Chen^1, , Rong Ju¹, Jie Xu¹, Gang Ma¹, Huaiyi Chen¹ and Guchao Xu¹

¹School of Electrical & Automation Engineering, Nanjing Normal University, Nanjing, China

Cite this paper:
Yixi Chen, Rong Ju, Jie Xu, Gang Ma, Huaiyi Chen and Guchao Xu. Double Criteria Feeder-Selection Method for Single-Phase Ground Fault of Resonant Grounding System Based on Multi-State Components. American Journal of Electrical and Electronic Engineering. 2017; 5(4):144-151. doi: 10.12691/ajeee-5-4-4

Abstract

Resonant grounding system has been widely applied in low-voltage power systems all over the world. For the single-phase ground fault feeder-selection of resonant grounding system, the amplitude/phase comparison method of zero-sequence current which is used in traditional fault feeder-selection is not suitable to be used, due to the compensation action of arc suppression coil. In this paper, the electrical quantity changes after the single-phase ground fault of small current grounded system are analyzed firstly, therefore the reason why the amplitude/phase comparison method of zero-sequence current is not suitable to be used in resonant grounding system can be obtained. After that, based on zero-sequence current’s multi-state components (transient component and steady component), a new fault feeder-selection method using double criteria is proposed, which not only can be applied in the single-phase ground fault of resonant grounding system but also has high reliability. At last, simulations based on MATLAB/Simulink are conducted to verify the validity of the method proposed in this paper.

Keywords:
resonant grounding system fault feeder-selection single-phase ground fault multi-state components

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