Flexible Grid-connection Technique of Quasi-Z Source Photovoltaic Power Generation System based on Direct Power Control
To make the Quasi-Z-source inverter applied in photovoltaic systems better,a flexible grid-connection method based on direct power control is proposed.The proposed method adopted grid power to control APF directly,thus the detection of harmonics and reactive current of loads is omitted.Moreover,space vector modulation(SVM)is adopted to keep switching frequency constant and improve dynamic performance.In this paper,the reference value of power control loop is acquired from the Quasi-Z source network and the power compensation required by maximum power point tracker(MPPT)is also considered.Therefore a comprehensive optimization of active power loss and the compensational performance is achieved.Besides,the control reliability is improved and the cost is reduced.Simulation results verified the validity and feasibility of the approach.
photovoltaic flexible grid-connection active power filter Quasi-Z source inverter direct power control
Yuxun Luo Zhiyong Li Xingyao He Xuexiu Zeng
School of Information Science and Engineering,Central South University,Changsha,Hunan,410083,China
国际会议
长沙
英文
3334-3338
2014-05-31（万方平台首次上网日期，不代表论文的发表时间）