Research on source-load frequency response control strategy of distributed generation system[Research and practice of steady-state power control strategy for off-grid distributed generation]

Distributed power generation, as an effective form of new energy power generation, has attracted extensive attention. However, due to the lack of physical inertia support, the stability of the distributed power supply system is threatened. Aiming at the problem of low inertia and weak damping in distributed systems, a source-load frequency response control strategy is proposed in this paper. Firstly, this paper introduces the structure and working mode of the distributed power generation system, and the system frequency characteristics are theoretically analyzed. Then, based on the operating characteristics of the conventional power system, the generator is simulated through the distributed power generation, the load-side converter is coupled to the grid frequency and further the source-load frequency response control strategy is achieved that taps the potential of frequency adjustment capability of the load side through frequency coupling control to provide auxiliary inertia support for the system, and this paper illustrates the source-load frequency adjustment response mechanism in detail. Compared with the conventional single frequency response control, the control strategy proposed in this paper can effectively alleviate the frequency adjustment pressure of distributed units, reduce the capacity of energy storage equipment due to frequency adjustment and improve the efficiency of system operation. Finally, through the simulation analysis of the distributed power generation system, the effectiveness of the control strategy proposed in this paper is verified.