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 dispa

tch.