云广特高压直流输电系统中换流变压器铁心饱和不稳定分析Analysis on Converter Transformer Core Saturation Instability in UHVDC Power Transmission System from Yunnan to Guangdong
杨小兵;李兴源;金小明;郝巍;
摘要(Abstract):
高压直流换流器和换流变压器的饱和特性之间的相互作用可以导致换流变压器铁心饱和不稳定现象的发生。文章研究了变压器铁心饱和不稳定的产生机理,给出了饱和稳定因子(saturation stability factor,SSF)的定义,提出了采用仿真方法求取换流器两侧谐波关系的矩阵参数和SSF。基于南方电网2010年数据,采用PSCAD/EMTDC对云广±800kV特高压直流输电系统建立了详细的电磁暂态仿真模型,对三相接地故障激发的铁心饱和不稳定现象进行了仿真研究,验证了SSF判断法的有效性。
关键词(KeyWords): 特高压直流(UHVDC);铁心饱和不稳定;饱和稳定因子(SSF)
基金项目(Foundation): 国家重点基础研究专项经费资助项目(2004CB217907);; 国家科技支撑计划项目(2008BAA13B01)。~~
作者(Author): 杨小兵;李兴源;金小明;郝巍;
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DOI:
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