CAJ | 학술논문

多端柔性直流输电系统可实现多电源供电、多落点受电等，是解决孤岛供电、新能源并网行之有效的解决方法。以基于模块化多电平换流器的“两送一受”三端柔性直流输电系统为例，介绍混合运行方式中各换流站控制策略，并在PSCAD/EMTDC平台搭建仿真模型，仿真结果验证了混合运行方式的可行性。
다단유성직류수전계통가실현다전원공전、다낙점수전등，시해결고도공전、신능원병망행지유효적해결방법。이기우모괴화다전평환류기적“량송일수”삼단유성직류수전계통위례，개소혼합운행방식중각환류참공제책략，병재PSCAD/EMTDC평태탑건방진모형，방진결과험증료혼합운행방식적가행성。
The multi-terminal VSC-HVDC system helps to realize the multi-power-supplies and multi-power-receiving function and it is an effective solution for the islanded power supply and renewable power integration. As a flexible and efficient transmission way,there are many operation modes in VSC-MTDC transmission system. When connected with a different AC network,power supplies should adopt the different control strategies to stabilize voltage, hence the so-called mixture operation in engineering. This paper introduces a 3-terminal VSC-HVDC transmission system characteristic of“two-supplies and one-receiving”based on MMC,and also intro-duces the control strategies of each convertor station. Finally, the simulation model of 3-terminal MMC-HVDC is built under PSCAD/EMTDC simulation platform, and the results verify effectiveness of the mixture operation mode.