Influence of Uncertainty of Distributed Generation on Optimal Dispatching of Active Distribution Network

Abstract

A large number of distributed generation access brings new challenges to optimal dispatching of active distribution network. Aiming at the active distribution network with high permeability distributed generation, considering the utilization and failure of distributed generation and combining with the characteristics of active distribution network, the component modeling, optimal dispatching and planning research are summarized. Using the main network power market, dispatchable distributed generation and energy storage units participate in the optimal dispatching of distribution network system. Based on the two-stage optimal planning strategy, a DMS optimal dispatching model with distributed generation participating in power market transactions is proposed, which takes the minimum operation cost of distribution network as the objective function, and introduces some related constraints such as exchange power restriction, distributed generation output and DGs climbing. The model is solved under the constraints. The results of an example show that the proposed DMS optimal dispatching model can achieve lower operating cost of the whole network and provide sufficient available capacity under the constraints of power balance and safe operation of the power grid, which has obvious advantages.