孔明;邱宇峰;贺之渊;何维国;刘隽;

• 1:中国电力科学研究院
• 2:上海市电力公司

摘要(Abstract)：

针对用于高压直流输电的新型模块化多电平电压源换流器,详细分析了其预充电动态过程,以寻求合适的预充电控制策略。首先以单站模块化多电平结构电压源换流器(modular multilevel converter,MMC)为研究对象,将换流器预充电分为2阶段,分析了各阶段,特别是MMC解锁瞬间过电流的形成机制及影响因素;为保证换流器解锁后,控制器对充电电流的有效控制,对多电平调制算法进行优化,使其在换流器预充电和正常运行阶段均适用;同时就基于MMC的柔性直流输电(MMC-HVDC)运用于向无源系统供电和作为"黑启动"电源的应用场合,需要一端交流源同时向双站两端预充电时,针对逆变站MMC电容充电不足的问题,提出一种整流站和逆变站协调配合的双站两端预充电控制策略;最后构建向无源系统供电的MMC-HVDC数字和物理仿真模型,验证了所提出控制策略的可行性和有效性。

关键词(KeyWords)： 柔性直流输电;模块化多电平换流器;预充电控制;最近电平调制算法;黑启动

Abstract:

Keywords:

基金项目(Foundation): 国家电网公司科技项目(ZLA40[2010]0280)~~

作者(Author): 孔明;邱宇峰;贺之渊;何维国;刘隽;

Email:

DOI: 10.13335/j.1000-3673.pst.2011.11.016

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