河北工业科技2017，Vol.34Issue(5)：354-361,8.DOI:10.7535/hbgykj.2017yx05008
参数差异化500kV单相自耦变压器成组运行适应性研究
Study on the adaptive operation of 500 kV single phase autotransformers with different parameters
摘要
Abstract
The inconsistency of the three phase parameters will lead to poor performance of the 500 kV single-phase autotransformer,and even bring security risks.In order to evaluate the influence of parameter difference of 500 kV single-phase autotransformer group on its operating performance and risk,a simulation model of 500 kV transformer group is set up based on the alternate maintenance of 500 kV transformer in Hebei Southern Power Grid,the transformer group sequence voltage and current,no-load circulation,low pressure winding circulation and neutral point current are calculated,and combining with the procurement standard,the optimal short-circuit impedance of 2 new 334 MVA transformer is determined.The influence of transformer three-phase parameter difference on the transient process is analyzed,and the risk of maloperation and rejection of protection is evaluated.The resuts show that when the difference of the actual short-circuit impedances of high-medium voltage side in 500 kV single-phase autotransformer group is small,the steady state performance of the transformer is better.The results show that the combination operation of 500 kV single-phase autotransformers with different parameters is feasible and has reached a good level in transient and steady-state performance.关键词
电机学/500 kV单相自耦变压器/短路阻抗/环流/保护Key words
electrical machinery/500 kV single phase autotransformer/short circuit impedance/circulation/protection分类
信息技术与安全科学引用本文复制引用
武玉才,尹子会,唐劲飞,张志刚..参数差异化500kV单相自耦变压器成组运行适应性研究[J].河北工业科技,2017,34(5):354-361,8.基金项目
河北省自然科学基金(E2016502031) （E2016502031）
