Three-level photovoltaic inverter technology based on repetitive control
ZHANG Guo-yue1, QU Yi-long2, QI Dong-lian1, LI Ran1
1. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China; 2. HighTech Research and
Development Center, Ministry of Science and Technology, Beijing 100044, China
The method of V-I double-loop control was proposed to control the diode-clamped three-level inverter based on the technique of space vector pulse-width modulation (SVPWM) in order to enhance both of the dynamic and static performance. The method was combined with repetitive control which is beneficial for both enhancing the quality of output current and repressing periodic disturbance. The prototype of a 12 kVA 640 V DC/220V 50 Hz AC inverter was designed and developed. The results of the simulation in Matlab and the experimental result on the prototype confirm the effectiveness of the theory．
为了改善光伏发电系统的动态和静态性能,针对基于三电平空间矢量脉冲宽度调制（SVPWM）技术的二极管箝位式三电平逆变器,提出采用电压电流双闭环控制与重复控制相结合的复合控制方法,在提高输出波形质量的同时,有效地抑制周期性扰动,增强系统的稳定性.给出12 kVA 640 V DC/220 V 50 Hz AC样机设计,通过Matlab中的Simulink对系统进行仿真.实验和仿真结果均验证了该方法的有效性.
［1］ GONZALEZ R, GUBIA E, LOPEZ J, et al. Transformerless singlephase multilevelbased photovoltaic inverter ［J］. IEEE Transactions on Industrial Electronics, 2008, 55(7): 2694-2702．
［2］VILATHGAMUWA M, JAYASINGHE S. Diodeclamped three level inverter based battery/supercapacitor direct integration scheme for renewable energy systems ［J］. IEEE Transactions on Power Electronics, 2011, 26(12): 3720-3729．
［3］ RAGHURAM L N, SURESH H J. A critical study of modulation techniques for threelevel diodeclamped voltage source inverter for grid connection of WECS ［C］∥ ICEES 1st International Conference. Kuala Lumpur, Malaysia: IEEE, 2011: 221-226．
［4］ 赵强.带LCL滤波器的新能源并网发电用三相PWM变换器研究［D］.青岛：中国石油大学,2009．
ZHAO Qiang. Research on threephase gridconnected PWM converter with LCLfilter for renewable energy generation ［D］. Qingdao: China University of Petroleum (East China), 2009．
［5］ KAZMIERKOWSKI M P, MALESANI L. Current control techniques for threephase voltagesource PWM converters: a survey ［J］. IEEE Transactions on Industrial Electronics, 1998, 45(5): 691-703．
［6］ MATEUS F S, DENIZAR C M. Threephase gridconnected photovoltaic system with active and reactive power control using dq0 transformation ［C］∥IEEE 39th Annual Power Electronics Specialists Conference. New York: IEEE, 2008: 1202-1207．
［7］ 陈伯时.电力拖动自动控制系统：运动控制系统［M］.北京:机械工业出版社,2003:59-87．
［8］ 孔雪娟,王荆江,彭力.基于内模原理的三相电压源型逆变器的波形控制技术［J］.中国电机工程学报,2003,23(7):67-70．
KONG Xuejuan, WANG Jingjiang, PENG li. Research on waveform control technique for threephase voltagesource inverter based on internal model theory ［J］. Chinese Society for Electrical Engineering, 2003,23(7):67-70．
［9］ ZHOU K, WANG D. Digital repetitive learning controller for threephase CVCF PWM inverter ［J］. IEEE Transactions on Industrial Electronics, 2001, 48(4): 820-830．
［10］ TEODORESCU R, BLAABJERG F, BORUP U, et al. A new control structure for gridconnected LCL PV inverter with zero steadystate error and selective harmonic compensation ［C］∥IEEE 19th Annual Applied Power Electronics Conference and Exposition. New York: IEEE, 2004: 580-586．
［11］ 梁雪峰,曾国宏,姜久春.3kw光伏并网逆变器硬件设计［J］.电力电子技术,2008,42(8):28-29,78．
LIANG Xuefeng, ZENG Guohong, JIANG Jiuchun. Hardwares design of 3kw photovoltaic gridconnected inverter ［J］. Power Electrics, 2008,42(8):28-29,78．
［12］ 宋强,刘文华,严干贵,等.基于零序电压注入的三电平NPC逆变器中点电位平衡控制方法［J］.中国电机工程学报,2004,24(5):57-62．
SONG Qiang, LIU Wenhua, YAN Gangui， et al. A neuralpoint potential balancing algorithm for threelevel NPC inverters by using analytically injected zerosequence voltage ［J］. Chinese Society for Electrical Engineering, 2004,24(5):57-62．
