交直流混合微电网接口变换器虚拟同步发电机控制方法

随着分布式发电技术的推广，交直流混合微网以其灵活性正得到越来越广泛的研究和应用，而接口变流器是其核心部件。提出了一种接口变换器虚拟同步发电机控制策略。该策略不仅能使交直流子网有功功率分配更加均匀，还能使系统在大容量负荷投切过程中响应更加平滑，降低交直流子网快速功率波动的耦合影响。Matlab/Simulink仿真算例的验证结果表明，提出的接口变换器虚拟同步发电机控制方法能够降低交直流子网功率传导影响，有利于提高交直流微电网的运行稳定性。

Virtual synchronous generator operation of interlinking converter between AC and DC microgrids

With the development of distributed generation technologies, AC/DC hybrid microgrid is getting more and more extensive research and applications, where the interlinking converter (IC) is one of the key components. This paper proposes a novel interlinking converter control method based on current-controlled virtual synchronous generator (VSG). By employing the proposed method, the microgrid can not only properly share the loads between the AC and DC sub-grids under the steady state, but also smooth the response of the whole system during the significant load disturbance and reduce the coupling influence of fast power fluctuation of AC/DC sub-network. Matlab/Simulink simulations verify that the proposed method can lower power conduction infiuence of AC/DC sub-network and help to improve the operation stability of AC/DC microgrid.