摘要
对国内常用的电力系统分析软件采用的变压器模型和参数进行了分析和对比;在假设双绕组变压器也有中性点(在等值阻抗的1/2处)的基础上,导出了变压器的统一数学模型,这种模型等值阻抗接于中性点,变压器各侧均带非标准变比,等值阻抗在变比调节时固定不变;指出了采用不当的变压器模型和参数,在调整变比时潮流方程的性质会由定参数问题转变为变参数问题;对变压器等值阻抗的折算、电力网络母线电压基准值的选取也进行了探讨,并给出了建议。
In this paper, transformer model and its parameters adopted by commonly domestic used power system software was discussed and analyzed;an unified transformer model was derived on the assumption that each two- winding transformer also has a neutral point, which is at the middle of the equivalent resistance. By this derived model, each side of the transformer has an non-nominal tap, the equivalent resistance is connected to the neutral point and keep fixed. It was found that power flow equations will be changed as to variable parameters from fixed parameters by incorporating inappropriate transformer model and parameters. Proposals on the calculation of transformer equivalent resistance and the selection of power system bus voltage base value were also presented.
出处
《华中电力》
2009年第1期12-14,18,共4页
Central China Electric Power
关键词
电力系统分析软件
变压器模型
参数
母线基准电压
： power aystem application software
transformer model
parameter
bus base voltage
