说明：  PQ分解法在计算潮流速度上大大超过N－R法，不但能应用于离线潮流计算，而且也能应用于在线潮流计算。
(PQ decomposition method in the calculation of the trend of speed much higher than the N-R method, not only applies to off-line power flow calculation, but also can be used in-line power flow calculation.)