1概述本演示展示了一个320 kV、200 MW高压直流输电系统,该系统具有两个模块化多级变流器(MMC),将两个110 kV高压交流电网互连。MMC是用于HVDC应用的普遍类型的电压源换流器拓扑。 在高电压下,直流电的传输可以…
Finally, the simulation results in PSCAD/EMTDC verify the correctness and feasibility of the proposed improved control strategy and optimized power allocation strategy for the MMC-HVDC system under DC faults. Keyword: MMC-HVDC transmission; full-bridge sub-module; DC faults; fault ride-through ...
基于暂态能量流的MMC-HVDC系统故障建模及仿真分析
5.采用当前主流的电力电子系统仿真软件即使用Matlab中simulink仿真软件,实现了MMC-HVDC系统的仿真验证。 关键词:MMC-HVDC新型高压输电系统,控制,CPS-PWM调制,仿真 ABSTRACT Atpresent,becauseoftraditionalconverterasLCC-HVDCisthroughthethyristorvoltagechangeofthesystem,basedonthethyristorisnocurrentofpowerelectronicdevices...
基于模块化多电平换流器的高压直流(Modular Multi-level Converter based on High Voltage Direct Current, MMC-HVDC)电网具备有功功率、无功功率快速解耦、无换相失败等优点,被认为是未来解决高比例可再生能源并网消纳问题的关键技术之一[1-2]。 采用半桥型子模块(Half Bridge Sub-Module,HBSM)的MMC系统,以其成本...
Finally, fault characteristics of single-phase short-circuit of HVDC system were verified.%针对MMC-HVDC系统典型的阀侧单相对地短路故障进行建模和分析.忽略暂态过程中子模块投切时数量的不对称,分别建立了阀侧母线单相接地短路时的交流侧等效电路和直流侧等效电路,进而推导了故障状态的阀侧母线电压和电流,直流侧...
resonance mechanism of the MMC-HVDC transmission system is systematically revealed. Finally, the effectiveness and correctness of the proposed model and resonance analysis are verified by simulation. The analysis and simulation results show that only active resonance occurs in the MMC DC-side system at...
Therefore, it is urgent to break through the related technology of MMC -based HVDC system line protection for overhead lines applications, which is the key to ensure the reliable operation of the flexible DC system. In this paper, the transmission line fault characteristics analysis and fault ...
2014年4月16日PowerSystemProtectionandControlApr.16,2014 基于无差拍电流控制的MMC-HVDC系统控制策略研究 邓雪松 1 ,欧开健 2 ,陈鹏 1 ,崔小岳 1 (1.西南交通大学电气工程学院,四川成都610031;2.南方电网科学研究院,广东广州510080) 摘要:随着电平数的增加,基于dq0旋转坐标系MMC-HVDC的控制器运算量会非常大。为...
In addition, the properties of the MMC-HVDC system are determined by the characteristics of the control system to a certain extent. In order to study the physical controller design strategy, the primary system structure and electrical parameters of MMC-HVDC physical simulation system are designed. ...