Abstract: When severe unbalanced voltage dips occur in power grids,a virtual synchronous generator（VSG）is usually configured with a static synchronous compensator（STATCOM）to cope with problems such as insufficient voltage support and current overrun. The coordinated control between STATCOM and VSG in real situations relies heavily on real-time communication. Therefore,the article proposes an optimized coordinated control strategy for VSG and STATCOM based on digital twin technology. Firstly,positive and negative sequence current control structures are established to support the voltage at the grid connection point of renewable energy stations. Then an improved multi-objective coordinated control strategy is proposed to achieve multiple control objectives including voltage support,current limitation,and active power output. Furthermore,a coordinated control model of VSG and STATCOM based on the digital twin is constructed to address the real-life coordinated control communication delay problem. Finally,the effectiveness of the method is verified by using the MATLAB simulation platform.