基于大规模子模块群的MMC建模与快速仿真算法

发布时间：2017-12-27 01:14

本文关键词：基于大规模子模块群的MMC建模与快速仿真算法　出处：《电网技术》2015年05期 　论文类型：期刊论文

【摘要】：对高压大容量模块化多电平变流器(modular multilevel converter,MMC)和基于MMC的直流输电系统进行仿真时,子模块数目众多,导致了仿真速度缓慢。针对该问题,分析了MMC桥臂的电气行为,建立了在闭锁状态和解闭锁状态时桥臂的数学模型。对该数学模型进行简化后,建立了桥臂的等效电路和等效电气关系,使之能够模拟桥臂的闭锁状态和解闭锁状态。为验证桥臂的等效电路和等效电气关系的准确性,设计了一个柔性直流输电系统,并在仿真软件中搭建了基于详细MMC模型和简化MMC模型的直流输电系统,对MMC的启动、解闭锁、稳态过程和直流故障过程进行了仿真。仿真结果表明,2种仿真模型的电气行为基本保持一致,验证了简化MMC模型的准确性。
[Abstract]:When simulating the HVDC modular multilevel converter (MMC) and the HVDC transmission system based on MMC, the number of sub modules is large, which results in the slow simulation speed. In view of this problem, the electrical behavior of the MMC bridge arm is analyzed, and the mathematical model of the bridge arm is set up in the locking state and the interlocking state. After simplifying the mathematical model, the equivalent circuit and the equivalent electrical relationship of the bridge arm are established to simulate the interlocking state of the bridge arm and the interlocking state of the bridge arm. In order to verify the accuracy of bridge arm equivalent circuit and equivalent electrical relationship, the design of a flexible DC power transmission system, and build the DC transmission system with MMC model and the simplified MMC model based on the simulation software of MMC, the starting solution, locking, steady and DC fault simulation. The simulation results show that the electrical behavior of the 2 simulation models is basically consistent, and the accuracy of the simplified MMC model is verified.
【作者单位】：国网智能电网研究院;中国电力科学研究院;
【基金】：国家重点基础研究发展计划项目(973计划)(2012CB215200)~~
【分类号】：TM721.1;TM46
【正文快照】： 确性,设计了一个柔性直流输电系统,并在仿真软件中搭建了基于详细MMC模型和简化MMC模型的直流输电系统,对MMC的启动、解闭锁、稳态过程和直流故障过程进行了仿真。仿真结果表明,2种仿真模型的电气行为基本保持一致,验证了简化MMC模型的准确性。0引言相对于线电压换相变流器(li

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