Analysis and Experimental Validation of Bidirectional Z-Source DC Circuit Breakers
Analysis and Experimental Validation of Bidirectional Z-Source DC Circuit Breakers
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DOI：
10.1109/tie.2019.2928284
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发表时间：
2020-06
影响因子：
7.7
通讯作者：
S. Savaliya;B. G. Fernandes
中科院分区：
文献类型：
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作者：
S. Savaliya;B. G. Fernandes
本文对低压直流微电网中双向Z源断路器和耦合电感双向Z源断路器进行了分析和实验验证。所提出的拓扑结构使用可控硅作为开关来隔离系统中的故障，而LC网络则在故障情况下为可控硅产生所需的换相条件。因此，这两种拓扑都能够在几微秒内自然隔离故障，而不需要任何故障检测和检测电路。本文讨论了断路器在故障情况下的工作原理，推导了断路器的设计准则。当断路器与电力电子变流器串联时，Z源元件提供滤波特性。分析了断路器部件所提供的滤波特性。为了验证断路器的性能，开发了两种结构的功能样机，并给出了实验结果。
This paper discusses the analysis and experimental validation of bidirectional Z-source breaker and bidirectional Z-source breaker using coupled inductor for low-voltage dc microgrid application. The proposed topologies use an SCR as a switch to isolate the fault from the system, and LC network to generate required commutation conditions for the SCR under fault conditions. Thus, both topologies are able to isolate the fault naturally within a few microseconds without any fault detection and sensing circuit. In this paper, the breaker operating principle is discussed during fault condition and breaker design criteria are derived. When the breaker is connected in series with power electronic converter, Z-source components offer filtering characteristic. The filtering characteristic offered by the breaker components is analyzed. Functional prototypes are developed for both configurations to validate the breaker performance and experimental results are presented.