变电站主变短路电压参数优化设计方法

Optimization Design Method of Short Circuit Voltage of Main Transformer in Substation

合理选取主变压器短路电压参数是变电站规划设计阶段的重要技术问题之一,其关系到整个变电站运行过程中的安全性、可靠性与经济性。首先,基于适用于短路电流计算的变压器的短路电压模型,利用理论分析建立短路电压参数与短路电流、无功补偿装置问题之间的函数关系。在此基础上,提出考虑短路电流、无功补偿容量双重约束的变压器短路电压参数优化设计方法。以典型220 k V变电站为例,用所提方法对变电站主变短路电压参数进行优化,验证所提方法正确、有效。

Appropriate selection of the short circuit voltage of the main transformer is one of the key problems in the planning and design of the substation,which determines the security,reliability,and economy during the substation operation.Firstly, functional relationships are established theoretically based on the impedance model of transformer available for the short circuit analysis.The functional relationships contain parameters of short circuit voltage and short circuit current,parameters of short circuit voltage and reactive power compensation.On these bases,the optimization design method is presented considering two constraints,including short circuit current level and reactive compensation capacity.Case study on the design of typical 220 kV substation verifies the correctness and effectiveness of the proposed method for theoptimization of the parameters of short circuit voltage.