托克托电厂阻塞滤波器引发机组异步自励磁的分析Analysis on Asynchronous Self-Excitation Induced by Blocking Filter Installed in Tuoketuo Power Plant
谢小荣;刘平;张仁伟;白恺;王征;高洵;王辉;
摘要(Abstract):
针对托克托电厂阻塞滤波器(blocking filter,BF)运行中出现的异步自励磁现象,从电路原理、特征值分析和电磁仿真3个方面分析了其机理。在电路原理上,分析了BF非线性阻抗频率特性,阐明BF在特定频率段内呈强容性和弱阻性是其与机网形成串联型参数谐振进而导致异步自励磁的内在原因。然后采用特征值方法定量分析了异步自励磁的稳定性,以及机、网和BF参数对自励磁风险的灵敏度的影响。最后基于详细电磁仿真复现8号机BF投运试验中出现的异步自励磁现象,对比仿真和现场试验结果,验证了电路和特征值分析的正确性,为进一步修正BF设计、解决托克托电厂次同步谐振问题奠定了基础。
关键词(KeyWords): 阻塞滤波器;次同步谐振;异步自励磁
基金项目(Foundation): 国家自然科学基金项目(51077080)~~
作者(Author): 谢小荣;刘平;张仁伟;白恺;王征;高洵;王辉;
Email:
DOI: 10.13335/j.1000-3673.pst.2012.04.036
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