功率模块数不对等的MMC阀段运行试验研究

Research on MMC Valve Section Operation Test in the Condition of Unequal Number of Power Modules

为了研究功率模块数不对等条件下柔性直流换流阀阀段运行试验方法,文中通过分析阀段运行试验过程中进行模块旁路试验的过程,建立了试验回路电流和模块电压的数学计算模型,提出了功率模块数不对等条件下的阀段运行试验方法。利用PSIM仿真软件对试验方法进行了仿真,并在实际的阀段运行试验中应用了该方法。仿真与试验结果表明,文中设计的试验方法可以实现功率模块数不对等条件下MMC阀段运行试验测试,满足试验要求。

In order to study the valve section operation test method of HVDC flexible valves under the condition of unequal number of power modules,the calculation models of test loop current and power module voltage are estab- lished,and valve section operation test method in the condition of unequal number of power modules is proposed, through analyzing the power module bypass test procedure during the valve section operation test.The test method is simulated by using PSIM simulation software and applied in the practical valve section test.Both the simulation and test results indicate that the test method proposed in the paper is able to achieve the MMC valve section test under the condition of unequal number of power modules,and satisfied the test requirements.