Analysis of Distribution Fuzzy Matching Power Flow State Estimation Method

The measurement information of distribution system is reasonably expressed with fuzzy set, and based on the measurement device configuration, the radial structure and the measurement information model of distribution network, a novel fuzzy matching power flow (FMPF) is proposed, which has the equivalent expressions of robust WLAV estimation method applied to the distribution system. Considering the fuzzy restrictions of the pseudo measurement, the obtained results from the proposed method have no optimal but satisfactory WLAV estimation meaning. Finally, the back/forward sweep method based on the fuzzy linear programming is adopted to solve the FMPF, which has such advantages that its physical meaning is clear and programming implementation is convenient, and overcomes the disadvantage of large computation burdens of WLAV. The results of the practical example show the rationality and applicability of the proposed method.