State estimation of AC/DC distribution network based on pseudo measurement modeling of load distribution coefficient

Abstract

Aiming at the problem of insufficient configuration of real-time measurement in AC/DC distribution network, a state estimation of AC/DC distribution network based on pseudo measurement modeling of load distribution coefficient is proposed. Firstly, the historical data of load distribution coefficient is calculated according to the historical data of node load, then the pseudo measurement of node load is calculated by using adaptive exponential smoothing algorithm combined with real-time measurement, and finally the state estimation of AC/DC distribution network based on weighted least square method is carried out. The simulation results show that the proposed method can effectively reduce the pseudo measurement error and improve the accuracy of distribution network state estimation.