Abstract: The traditional fault location method lack effective fault location process，which leads to the increase

of ranging error，fault location time and complexity. In order to effectively solve the above problems，a new fault

location method for multi-power distribution network based on traveling wave theory was designed. Firstly，the

position point where the initial traveling wave reaches the fault of multi-power distribution network was selected as

the reference measurement point. Then，based on traveling wave theory，the reference measurement points and other measurement points receiving fault traveling wave signals were analyzed，and the distances between multiple fault points and reference measurement points were calculated，and the final fault point location of multi-power

distribution network was determined by selecting the maximum value. The simulation results show that this method

can effectively reduce the ranging error，the time of consumption and complexity of fault location，and it is less

affected by noise，so it is effective and practical.

      Key words: traveling wave theory；multi-power distribution network；fault location；fault distancemeasurement