3MMC在ABC坐标系下的平均值模型-南方电网技术.doc

文章编号：1674-0629(2012)01-0001-07 中图分类号：TMXXX 文献标志码：A DOI：10.13648/j.cnki.issn1674-0629.2014.0x.00x 可仿真IGBT闭锁动态的MMC等值模型与平均值模型 （1. 国网湖北省电力公司，湖北省 武汉市 430077；. 强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院)，湖北省 武汉市 430074 3. 湖北省电力勘测设计院，湖北省 武汉市 430040） 摘要：本文提出了可仿真各种工况的MMC等值电磁暂态模型和适用于系统级研究的MMC平均值模型。论文首先分析了MMC在启动以及直流故障期间桥臂电容电压的动态过程，继而提出了改进的MMC等值电磁暂态仿真模型。通过分析桥臂总电容电压的动态特性，提出了可仿真任意工况的MMC平均值模型。论文随后在PSCAD/EMTDC下搭建了21电平MMC的详细电磁暂态仿真模型，等值电磁暂态模型和平均值模型。通过启动、电流阶跃、交流故障和直流故障下的仿真，验证了本文所提出模型的精确性，所提出的等值电磁暂态仿真模型和平均值模型可以分别在换流站级和电力系统级的研究上取代详细开关模型并大大提高仿真速度。 关键词：电压源型换流器; 模块化多电平换流器; 电磁暂态仿真;等值电磁暂态仿真模型；平均值模型 Equivalent and Averaged Value Model of MMC able to simulate blocking scenarios JIANG Lin1, ZHOU ShijiaLi Zishou1, XIANG Wang2, HU Jizhou1, CHENG Jie3, WEN Jinyu2 (1. State Grid Hubei Electric Power Company, Wuhan 430077, Hubei Province, China; 2. State Key Laboratory of Advanced Electromagnetic Engineering and Technology ( Huazhong University of Science and Technology), Wuhan 430074, Hubei Province, China; 3. Powerchina Hubei Electric Engineering Corporation, Wuhan 430040, Hubei Province, China;) Abstract: Equivalent electro-magnetic simulation model and average value model of MMC that are able to simulate various conditions are proposed in this paper. Dynamics of the arm capacitors during start-up and DC fault of a MMC are firstly analyzed, an improved equivalent simulation model of MMC is then proposed. By analyzing the dynamics of the total capacitor voltage of an arm, an average value model of MMC is then proposed. Detailed switching model, equivalent model and average value model of a 21-level MMC are then built on PSCAD/EMTDC. By comparing the simulation results during start-up, current step, AC fault and DC fault, accuracy of the proposed models are confirmed. The proposd equivalent model and average value model are respectively suitable to replace the detailed simulation model of MMC in the converter-level study and power system level study while the simulation speed is significantly increased K