The topological relationship information of low-voltage distribution station area is of great significance for such aspects as line loss analysis

tamper warning

fault location and optimal operation. In view of such problem as missing or inaccurate topological relations in the present low-voltage distribution station area

the system structure supporting the topology identification of low-voltage distribution station on the basis of the advanced measurement system is set up firstly in this paper. Then

a topology identification method for low-voltage distribution station area based on weighted least squares is proposed

which needs to collect the active current of the transformer low-voltage expansion acquisition unit and the user-side smart meter for multiple periods and the matrix equation for solving the topological relationship by least squares method in accordance with the current data is set up. The greater weight is applied to the data with shorter time in order to achieve the purpose of discovering the changed topological relationship as soon as possible.Finally

the topological changing discovery rate index reflecting weighted least square calculation performance and the allowable error rate index reflecting the tolerance limit of measurement error are proposed in this paper and the recognition method proposed in this paper is analyzed in accordance with these indexes in the example simulation.