Distributed Optimal Control Strategy of New Energy in Novel Power Systems

While novel power systems are developing in the direction of electrification and cleaning, there are many unstable factors in system. To alleviate the influence of random factors of external excitation on the stability of novel power systems, virtual synchronous generator (VSG) can simulate the operation mechanism of synchronous generator and provide inertia and damping support for the system. In island mode, the parallel operation mode of multiple distributed generation is usually adopted to improve the capacity and reliability of microgrid, but the parallel system is prone to the problem that reactive power cannot be accurately distributed. The paper proposes a parallel VSG distributed control method based on consensus secondary control strategy, which can improve the distribution characteristics of active power and reactive power of the system. Integration link is introduced into the reactive power control loop of the microgrid inverter. The adjacent VSGs can reduce the voltage fluctuation at the point of common coupling and realize the on-demand distribution of reactive power by only a small amount of information interaction among multiple agents. The simulation model verifies the effectiveness of the proposed method.