Flexibility dispatching strategy for power grid based on partition method of renewables penetration rate

Abstract

With the proliferation of the penetration rate of renewable energy sources (RESs), more flexibility should be released to cope with the demand caused by the uncertainty of RESs output. Thus, it is paramount to divide different stages of the RESs penetration rate from the perspective of dispatching to represent the flexibility supply-demand relationship. Based on these considerations, this paper presents a novel approach to divide the level of RESs grid-connected with the aim to counteract the volatility and alleviate its effect of it. Herein, we define two specific stages with heterogeneous dispatching strategy, the first stage aiming at minimizing RESs power limit while the second stage takes the secure operation of the power grid as the optimal target by adjusting the optimization objectives of intraday rolling and real-time dispatching plan. Simulation results demonstrate the feasibility of the partition method.