发电厂内厂用电并联切换方式的分析计算

ANALYSIS AND CALCULATION OF AUXILIARY POWER SWITCHING WITH PARALLEL CONNECTION IN POWER PLANT

发变组单元接线,厂用变压器引自发电机端的发电厂,实现厂用电并联切换方式,可以简化运行操作,保障辅助设备的连续供电和运行操作安全。文中分析了变压器变比误差、短路阻抗对并联切换的影响,计算了满足并联切换条件时机组间的允许负荷差异。

In order to simplify operation and ensure continuous power supply for auxiliary equipment and safe operation, a power plant where a generator and a main transformer are joined into a unit, and the transformers for plant power supply are linked to generators, can implement power supply in parallel operation. This paper analyzes the influence of the error of the transformer normal tapping ratio, short-circuit resistance and the load of plant power supply on parallel operation, and calculates the difference between the allowable loads for different units while parallel operation conditions are satisfied.