Research on Reactive Power Adaptive Control System of Photovoltaic Inverter for Stable Operation of Distribution Network

In this paper, reactive power adaptive control system of photovoltaic inverter for stable operation of distribution network is studied. This paper presents an adaptive hysteresis control algorithm for grid-connected solar photovoltaic inverters to improve the stability and response speed of grid-connected solar photovoltaic systems. Based on the hysteresis control mathematical model, the algorithm dynamically adjusts the hysteresis control threshold and bandwidth through real-time monitoring and analysis of the photovoltaic array output power, to achieve accurate reactive power control. In order to verify the effectiveness of the proposed algorithm, a simulation model of grid-connected PV inverter system is established in MATLAB/Simulink environment and a detailed simulation experiment is carried out. The simulation results show that the proposed adaptive hysteresis control algorithm can significantly improve the dynamic response speed and steady-state accuracy of the system, effectively reducing the fluctuation range of reactive power, and thus improving the stable operation level of the distribution network. This study provides a new idea and method for reactive power control of grid-connected photovoltaic inverters, which is of great significance for promoting the development of solar photovoltaic power generation technology.