Development of Highly Adaptable Inverter with Power Quality Control Ability

This project intends to study the power quality control method of microgrid system based on distributed power generation. The voltage and load three-phase current on the bus of the inverter access point are detected, so that the distributed grid-connected inverter is outside the output active power. It can also track and compensate the load harmonics and unbalanced current in real time according to the power quality of the power grid. Then, an adaptive compensation algorithm based on generalized integral is proposed to realize zero steady-state error of the system. The problem of poor frequency robustness of the traditional generalized integral control method is improved. The anti-interference ability of conventional GP controller is weak in frequency domain. Finally, the algorithm proposed in this paper was simulated using PSCAD/EMTDC. The experimental results indicate that this new control strategy can achieve high-precision, low-cost, low-cost, low-cost, and high-efficiency control of the power system.