摘要详情

ID / 提交时间

664 / 2022-03-31 10:14:28

标题

Research on Current Limiting Effect of New Fault Current Limiter Based on Self-driving Rheostat

关键字

fault current limit; self-driving; DC components; types of short-circuit fault

主题及专题

17. High Voltage Applications in Smart Grid

状态

摘要录用

作者

Dongze Xie / Dalian University of Technology

Rufan Wang / Dalian University of Technology

Zeming Feng / Dalian University of Technology

Minfu Liao / Dalian University of Technology

Xiongying Duan / Dalian University of Technology

Dequan Wang / Dalian University of Technology

摘要

Purpose/Aim

With the continuous improvement of power system voltage level, the suppression of short-circuit fault current in power system has become one of the focal problems to be solved urgently. This paper proposes a self-driving fault current limiter (SD-FCL) that based on self-driving rheostat.

Experimental/Modeling methods

This paper establishes an RLC single frequency discharge circuit for preliminary simulation analysis through PSCAD/EMTDC, and explores the current limiting effect of the transfer current-limiting branch resistor under different values of resistance. On the basis, this paper simulates and analyzes the influence of the frequency change under the action of different DC components on the current limiting effect. Then this paper simulates single-phase short-circuit fault, phase-to-phase short-circuit fault and three-phase ground short-circuit fault in 10kV power system model to further verify the feasibility of SD-FCL. Finally, a physical production of the test prototype and a fault current limiter test platform have been built to test current-limiting effect of prototype under short-circuit current of peak value 15kA.

Results/discussion

The results show that the proposed SD-FCL can reduce the peak value of the first half-wave of the short-circuit fault current by 13.98% within 4.5ms. SD-FCL responds quickly to the first half-wave of short-circuit fault current at different frequencies and it is suitable for short-circuit fault current suppression of 10kV power system.

Conclusions

SD-FCL adopts short-circuit fault current itself as the driving energy source to complete the transformation of rheostat impedance, without detection and control devices, and quickly limits the peak value of the first half wave of short-circuit fault current.

Appendix