基于RT-LAB的机电-电磁暂态混合实时仿真及其在MMC-HVDC中的应用  

Electromechanical-Electromagnetic Transient Real-time Simulation Based on RT-LAB and Its Application to MMC-HVDC

作　　者：朱琳 谭伟 王佳 寇龙泽 

机构地区：[1]全球能源互联网研究院,北京市昌平区102209 [2]上海科梁信息工程有限公司,上海市徐汇区200233

出　　处：《智能电网》2016年第3期312-322,共11页Smart Grid

基　　金：国家电网公司科技项目(SGRIZLKJ[2015]231)~~

摘　　要：模块化多电平柔性直流输电系统含有数千个微秒级控制周期的高速开关器件,现有机电和电磁仿真均无法同时兼顾详细的换流器内部物理特性及其接入交流大电网后与交流系统的交互特性。基于RT-LAB平台下新开发的机电—电磁混合仿真接口程序,首次提出百MW模块化多电平柔性直流系统接入交流大电网的混合实时仿真模型;为验证建模方法的正确性,在电磁侧开发模块化多电平柔性直流输电系统(modular multi-level converter HVDC,MMC-HVDC)系统详细电磁暂态模型,在机电侧搭建IEEE标准四机机电暂态模型,分别对柔直系统模型的启动、有功阶跃和交流系统故障进行仿真,仿真结果表明交直流系统相互作用明显,同时也证明基于该平台混合仿真的有效性及正确性。Modular multilevel converter based HVDC（MMC-HVDC） contains thousands of high-speed switching devices of microsecond control cycle, and the existing electromechanical and electromagnetic simulation are unable to consider both of the two characteristics, i.e. internal physical characteristics of the converter and the interaction characteristics after its access to large AC power grid. Based on the newly-developed electromechanical-electromagnetic hybrid simulation interface program under the RT-LAB platform, a new hybrid real-time simulation model of hundred megawatts modular multilevel flexible HVDC system connected to large AC power grid is presented. To verify the correctness of the modeling method, the MMC-HVDC system＇s detailed electromagnetic transient model is developed on the electromagnetic side, and the IEEE standard four electromechanical transient model is set on the electromechanical side. The starting, active step and AC fault response of the MMC-HVDC is respectively simulated, and the result shows that the interaction between AC and DC system is significant, and also proves the validity and correctness of the hybrid simulation based on the platform.

关 键 词：模块化多电平换流器 机电暂态仿真 电磁暂态仿真 混合实时仿真 

分 类 号：TM721.1[电气工程—电力系统及自动化]