Probabilistic load flow analysis for ADN optimal operation

Abstract

To effectively solve the power system security problem brought by uncertainty response of source and load in active distribution network(ADN), this paper sets up a new probabilistic load flow(PLF) model that regards the uncertainty of both demand response and exchanging power between virtual micro-grid(V-MG) and distribution network as random injected variables. Based on which this paper presents a strategy for ADN optimal operation. The proposed strategy optimizes the operation cost of ADN and uses the standard deviation of expectations calculated by PLF. The strategy can not only avoid the situation that all unbalanced power is undertaken by the superior grid, but also improve the security and economy of system operation. Effectiveness and practicality are testified through an example.