Development and Application of a 10 kV Mechanical DC Circuit Breaker

Lu Qu, Zhanqing Yu, Xiang Xiao, Wei Zhao, Yulong Huang and Rong Zeng
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Lu Qu: State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Zhanqing Yu: State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Xiang Xiao: Electric Power Research Institute, Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
Wei Zhao: Electric Power Research Institute, Guangdong Power Grid Co., Ltd., Guangzhou 510080, China
Yulong Huang: State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Rong Zeng: State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China

Energies, 2019, vol. 12, issue 19, 1-15

Abstract: A DC circuit breaker is piece of core equipment for DC grid construction and can achieve fast isolation of DC faults in the grid. In this paper, based on the fault characteristics and protection requirements of an AC/DC hybrid distribution network, the technical parameters and topology structure of an inductance and capacitance (LC) resonant commutation-type mechanical DC breaker are proposed. Furthermore, an engineering prototype of the mechanical DC circuit breaker is developed, then a small current breaking test and a large current breaking test are carried out. The test results show that a 10 kA fault current can be interrupted within 10 ms by the engineering prototype. Finally, the engineering prototype of the mechanical DC circuit breaker is installed in the AC/DC hybrid distribution network project, and a current breaking test is carried out. The test results show that the mechanical DC circuit breaker has good running conditions, and the function and performance meet the engineering design and operation requirements.

Keywords: mechanical DC circuit breaker; LC resonant commutation; DC distribution network (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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