Security Constrained Stochastic Unit Commitment Considering Fast Correction Control of Battery Storage and VSC

With the development of power electronics-based units such as battery storage systems (BSS) and voltage source converters (VSC) that can quickly respond, the power system will receive a lot of security benefits from these fast control units. To fully utilize fast correction controls from the BSS and grid coupling VSC (GCVSC), this paper presents a new $N-1$ security-constrained stochastic unit commitment (SUC) model for hybrid AC and DC grids. In the proposed model, those fast-control units are used to avoid overloading and voltage violations in the post-contingency short-term period. In order to maintain good voltage profiles during pre- and post-contingency periods, the reactive power support ability of the BSS and the GCVSC is also considered. To improve calculation speed, the Bilinear Benders decomposition-based method is used to solve the proposed SUC model. Results on two examples, hybrid AC and DC grids, show that the proposed method can provide highly effective unit commitment solutions with post-contingency corrective actions, especially suitable for avoiding post-contingency short-term security problems in day-ahead dispatch.