高压直流电流互感器阶跃响应试验技术研究

Research of stepresponse test method for HVDC current transformer

由于高压直流电流互感器的暂态特性试验缺少相应检测设备,导致该试验无法正常开展。设计了一种阶跃响应试验电源,利用IGBT开关的高速切断能力,通过支路切换方式,模拟试验所需的阶跃方波电流。对电源系统进行关键参数设计和仿真,依据仿真结果对试验电路进行了改进,进一步提高电路的安全性和稳定性。以阶跃响应试验电源、标准互感器和被测试互感器为主搭建了试验平台。试验结果表明,整个测试系统能够满足直流互感器暂态试验所需的试验条件。

Because the transient characteristic test of HVDC current transformer lacks corresponding detection equipment,the test can not be carried out normally.A step response test power supply is designed.The step square wave current required for the test is simulated by using the high-speed cut-off ability of IGBT switch and branch switching mode.The key parameters of the power system are designed and simulated.According to the simulation results,the test circuit is improved to further improve the security and stability of the circuit.Step response test power supply,standard transformer and tested transformer are used as the main test platform.The test results show that the whole test system can meet the test conditions for transient test of DC transformer.