混合式直流断路器功率模块测试仪设计研究

Design and Research of Power Modules Tester for Hybrid DC Circuit Breaker

由功率模块组成的电子开关是混合式直流断路器的核心设备,在高压、大容量直流输电系统中,电子开关通过功率模块串并联实现耐受高电压、大电流。由于功率模块存在数量庞大、电气拓扑复杂、关键元件不易测试等问题增加了现场检修试验难度。为此,这里根据某型号功率模块构成特点,设计了一种功率模块测试仪,可实现对功率模块主要元器件的全面自动检测,详细介绍了测试仪的设计方案。最后,研制了测试仪样机并验证了设计的正确性。

The electronic switch composed of power modules is the core equipment of hybrid DC circuit breaker.In high voltage and large capacity DC transmission systems,the electronic switch can withstand high voltage and high current through series and parallel connection of power modules.The large number of power modules,the complicated electrical topology,and the difficulty of testing key components increase the difficulty of field maintenance tests.To this end,based on the characteristics of a certain type of power modules developed,a power modules tester is designed,which can realize the comprehensive automatic detection of the main components of the power modules.Finally,a tester prototype is developed to verify the correctness of the design.