高压直流输电系统换相失败判断标准的仿真分析Simulation Analysis on Commutation Failure Criteria for HVDC Transmission Systems
何朝荣;李兴源;金小明;吴小辰;颜泉;
摘要(Abstract):
对2008年南方电网交直流混联输电系统建立了详细的电磁暂态模型,通过对贵广Ⅰ、贵广Ⅱ、北郊、惠州4条直流输电系统换相失败的仿真研究发现,当电压降落到75%时并不一定发生换相失败,因此提出了换相失败的标准:电压降落到70%时也不一定发生换相失败,关键应看阀关断角是否小于阀去游离时间对应的最小角度、阀电压是否连续为零、阀电流是否连续:若是,则会发生换相失败,若不是,则不会发生换相失败。
关键词(KeyWords): 高压直流输电;阀关断角;换相失败;交直流混联输电
基金项目(Foundation): 国家重点基础研究专项经费资助项目(2004CB217907);; 国家自然科学基金(50595412,50377017)。~~
作者(Author): 何朝荣;李兴源;金小明;吴小辰;颜泉;
Email:
DOI: 10.13335/j.1000-3673.pst.2007.01.005
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