用快速分解潮流法研究带病态支路的地下电缆系统

Investigation into Underground Cable Systems with Ill-Conditioned Branches by Fast Decoupled Load Flow

由于存在小电抗和大电阻，而使电缆系统中的病态支路有好几种类型；另外，由于导线对地电容比架空线时大很多，故可能会发生由收敛困难伴随的电压不稳定。利用经验尝试法对串、并联补偿等值电路作了探讨，并确定了最佳补偿值，其结果是并联电路没有成功的例子，串联电路的最佳补偿值与电压等级有关。补偿后收敛速度比架空线路慢很多，对其原因也进行了探讨。

There are several types of ill-conditioned branches in the cable system for the existence of small reactance and large resistance. Furthermore, the capacitance of conductors to earth is much larger than that of its overhead line counterpart, and consequently, voltage instability accompanied by convergence difficulties may occur. Experiments were made for both series and parallel compensation schemes and an optimal compensation level has been established by an empirical investigation. None of the parallel schemes succeeded. The optimal compensation level for the series schemes is related to the level of the voltage. After compensation, the convergence speed is much slower than that of the overhead line.