徐政;王世佳;李宁璨;肖晃庆;江伟;

• 1:浙江大学电气工程学院
• 2:国网福建省电力有限公司电力科学研究院

摘要(Abstract)：

提出了一种适用于远距离大容量架空线路的基于电网换相换流器和模块化多电平换流器(line commutated converter-modular multilevel converter,LCC-MMC)的串联混合型直流输电系统。该系统能够灵活控制有功功率和无功功率,且能够依靠LCC和MMC的协同控制应对交直流故障。首先提出了稳态下系统的控制方式;进一步地提出了交流故障下系统的控制策略,以使整流侧交流故障下系统不发生断流和逆变侧交流故障下系统仍能保持一定的功率输送能力;基于闭锁状态下MMC的输出电压特性分析,提出了直流故障下系统的控制策略。通过时域仿真验证了所述交直流故障下控制策略的有效性。

关键词(KeyWords)： 电网换相换流器;模块化多电平换流器;混合直流输电系统;直流故障清除;架空线路;大容量输电

Abstract:

Keywords:

基金项目(Foundation): 国家电网公司科技项目(SGCC-HRP031-2015)~~

作者(Author): 徐政;王世佳;李宁璨;肖晃庆;江伟;

Email:

DOI: 10.13335/j.1000-3673.pst.2016.01.008

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