李文津;汤广福;康勇;

• 1:华中科技大学电气与电子工程学院
• 2:国网智能电网研究院

摘要(Abstract)：

提出了基于动态直流泄能电阻的模块化多电平柔性输电直流方案,以提高基于感应双馈电机风电场的低电压穿越能力。基于矢量控制及无源电压跟随控制分别设计了系统侧、风场侧柔性直流换流器在风电场稳态运行时的控制策略。当交流系统故障导致电压跌落时,详细分析了动态直流泄能电阻的工作原理、动作判据及导通持续时间,以实现风电场低电压穿越;同时研究了其与系统侧模块化多电平换流器在故障清除后电压恢复期的协调控制,以快速恢复风电场有功输出能力。仿真结果表明:当交流系统故障时,含动态直流泄能电阻的柔性直流输电系统能够维持直流电压且不改变风电场输出电压电流;当故障清除后,风电场输出功率恢复速率远大于电力系统行业标准相关技术指标。

关键词(KeyWords)： 动态直流泄能电阻;模块化多电平换流器;低电压穿越;功率恢复

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51261130471)~~

作者(Author): 李文津;汤广福;康勇;

Email:

DOI: 10.13335/j.1000-3673.pst.2014.05.001

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