DΣ-Based Grid-Connected Converter with Reactive Power Compensation

This paper proposes a power compensation method to improve reactive power consumed by the filter. The control method includes the estimation model of active power and reactive power, and discusses the relationship among instantaneous power, active power and reactive power. By estimating the reactive power injected into the grid, the power required to compensate for the next switching cycle is calculated to adjust the actual power injected into the grid. This control method can improve the reactive power consumed by the filter when a general converter is connected to the grid. Finally, the simulated results are used to verify the feasibility of the proposed control method.