一种主变压器特殊运行方式的参数计算及应用

Parameter Calculation and Application of Special Operation Mode of the Main Transformer

运城500 kV变电站主变升压改造期间,两组主变需要在分接开关参数不一致的情况下并列运行,对这种特殊运行方式下两组主变并列运行的匹配分头进行了选择,对其引起的环流进行了计算分析,并就两组主变特殊运行方式过渡期可能遇到的负荷分配及控制等问题进行了探讨,为确保运城站主变在升压改造期间的安全稳定运行提供了决策依据,所述方法已在运城站升压改造过程中得到验证并取得了良好效果。

During the period of main transformer＇ sbeening reformed and upgraded to a higher voltage in Yuneheng 500 kV transformer substation, two main transformers have to operate paralleling to each other in the case of having different tap parameters. The article concerns the choice of matching tap in the special mode of two main transformer＇ s paralleling operation, the calculation of circulation which caused by paralleling operation and the likely load dispatching or controlling problems in the transition period of paralleling operation, which have given a comprehensive consideration to ensure the transformer safely and stably operating in the reform. The method had been tested and proved to be effective.