Coordinated Control System Design for Inverters in Distributed Power Generation

Aiming at the coordinated control problem of grid-connected inverters in distributed generation systems, a control strategy based on distributed algorithms is designed. A 50kW experimental platform consisting of 12 inverters is built to test the system performance. The experimental results show that: the maximum frequency deviation during islanding switching is 0.13Hz, the recovery time is 185ms; the dynamic adjustment time of power is 138ms, the overshoot is 9.2%; the total harmonic distortion rate of the system is 1.85%, and the power factor is 0.995. The control strategy has good dynamic performance and anti-interference ability, meeting the actual engineering requirements.