Research on the Control Strategy for Black Start of Power Grid with Large-Capacity Energy Storage

Abstract

It is undoubtedly necessary to improve the black start ability of power grid after large-scale failure to ensure the safe operation. Based on the analysis of the problems faced by the traditional black start scheme, it is proposed to allocate large-capacity energy storage in gas-fired power plants to assist the black start. Aiming at the black start scheme with energy storage participating in power grid recovery, an integrated energy storage control strategy based on the combination of droop voltage regulation control and V/f control is proposed. Depending on the control of the key links of black start, such as the stable establishment of auxiliary bus voltage, the start-up of large -capacity auxiliary machines and the charging of no-load transformers and transmission lines, a series of problems in the process of traditional black start have been improved and the recovery of power grid after failure has been accelerated. Finally, according to the simulation results, the feasibility and effectiveness of the proposed control strategy are analyzed.