柔性直流输电换流阀功率模块自动测试仪设计

Design of Automatic Tester for Flexible Direct Current Transmission Converter Valve Sub-module

换流阀是柔性直流输电工程中完成电能变换的核心单元,采用模块化多电平技术路线的换流阀由功率模块串联组成。由于功率模块数量庞大、电气拓扑复杂、电容容量大、电压高,因此对其关键元件参数的测量难度较大。为便于现场检修,功率模块的测试装置需要方便携带到阀塔上。根据柔性直流输电换流阀功率模块的特点,设计了一种便携式自动测试仪,可实现对功率模块电容、电阻、绝缘栅双极型晶体管(IGBT)、旁路开关等主要元器件的全面自动检测,详细介绍了测试仪的软件和硬件设计方案。以许继集团研制的功率模块为测试对象,验证了所设计的测试装置的正确性和实用性。

The converter valve power sub-module is the core module for completing the power conversion in the highvoltage flexible direct current transmission project,and its operational reliability is directly related to the stability of the entire direct current transmission system.Due to the large number,complex electrical topology,high capacitance and high voltage,it is difficult to measure the component parameters of sub-modules.According to the characteristics of the flexible direct current transmission converter valve sub-module,a portable automatic tester is designed,which can realize the comprehensive automatic detection of the main components such as capacitance,resistance,insulated gate bipolar transistor(IGBT) and bypass switch of the flexible sub-module.The software and hardware design of the portable automatic tester are introduced in detail.The power sub-module developed by Xu Ji Group is used as the test object to verify the correctness and practicability of the designed test device.