A Bidirectional DC Solid-state Circuit Breaker Based on Z-source

doi:10.11985/2020.02.005

Abstract

Abstract:

The development of DC microgrid is an important direction for the development of power systems in the future, but there are still some problems that limit the development of DC microgrid, such as prone to short-circuit faults and short-circuit fault currents. A bidirectional DC circuit breaker (BSSCB) based on Z source topology is introduced in order to solve these problems. BSSCB is a versatile device that includes power flow control, circuit interrupts, fault current limiting and interrupts in DC systems. The working principle of the BSSCB under different working modes is analyzed in detail with the simulation waveform. The design process and component selection criteria for the bidirectional circuit breaker are given later. Finally, the feasibility of the bidirectional DC circuit breaker is verified by experiments.

Key words: Circuit breaker, DC microgrid, fault isolation, multi-function

CLC Number:

TM561

YU Chunfeng, LI Weilin, WANG Yufeng. A Bidirectional DC Solid-state Circuit Breaker Based on Z-source[J]. Journal of Electrical Engineering, 2020, 15(2): 34-40.

Figures/Tables 10

References 17

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参数		数值
晶闸管T	I_T/A	100
	t_q/μs	50
	V_DMR/V	100
电源V_S/V		28
电容C		220 μF/50 V
电感L		1 mH/2 A
辅助电阻Ra/kΩ		1.5
辅助电容Ca/μF		220
负载电阻R_load		100 Ω/10 W
负载电容C_load		680 μF/50 V
负载电感L_load		33 μH/1 A