Then a Topo arithmetic for 400V radiate distribution network is put forward base on practicality course, and put forward forward-back power flow algorithm for 400V distribution network.

• 其次根据配电网络实际运行情况提出了适用于400伏辐射状配电网络的拓扑算法，并详细介绍了用于400伏的前代回代潮流计算方法。