Distributed Control Strategy for Harmonic Power Sharing in AC Microgrids
The power quality of the AC bus voltage is one of the key issues of a microgrid.In this paper,the invert-er-based distributed generator is connected to the relevant bus,and the harmonic power sharing problem of the microgrid with nonlinear loads is mainly studied.In order to solve the voltage distortion caused by nonlinear loads,a harmonic droop controller and a model predictive voltage controller are designed to replace the traditional double closed-loop con-trol of voltage and current.Based on this,a distributed cooperative consensus protocol for finite control set model predictive control is proposed,so that the harmonic power of each distributed generation is uniformly distributed at the common coupling points.The method can be adopted to improve the reliability and flexibility of the microgrid system,prevent grid disturbances and feeder impedance mismatches,and enable harmonic power to be distributed accurately proportionally among distributed generators.Simulation results show that the control strategy has a good effect in realiz-ing harmonic power sharing and improving the common coupling point voltage harmonic distortion.
AC island microgridharmonic power sharingmodel predictivedistributed controlpower quality
万方数据
维普
