三回平行接近输电线路的短路计算

Calculation on Short-circuit of 3-circuit Transmission Lines Situated in Parallel Proximity

三回平行接近输电线路的短路计算方法有 2种 :等值电路法和计算机数字仿真法。等值电路法比较直观 ,可以把具有互感的实际电路简化为仅有自感的等值电路来进行计算 ,使用条件为起始点必须为同一母线 ;计算机数字仿真法不仅不受此条件限制 ,还放开了互感支路数 ,大大提高了使用灵活性。文章先用等值电路法进行了计算 ,然后用计算机数字仿真法对计算结果进行了校核 ,并取得了一致结果。故编制软件 ,应用计算机数字仿真法 ,为多回平行接近输电线路的短路计算带来了方便。

There are 2 calculation methods for short-circuit of 3-circuit transmission lines situated in parallel proximity: equivalent circuit method and computer digital simulation method. The equivalent circuit method is relatively object and can simplify the actual circuit with mutual inductance into the equivalent circuit with only self-inductance for calculation if the start points of the applicable conditions must be at the same bus. The computer digital simulation method has not been limited by the previous condition, but increased the number of mutual inductance branches, which has greatly improved the flexibility of application. The author has used the previous method to calculate a sample and then use the later one to check the results. The same results are obtained. As a result, a software has compiled using the later method, which is convenient for short circuit calculation of multiple circuit transmission lines situated in parallel proximity.