直流储能型准Z源光伏并网逆变器  

Quasi-Z-source photovoltaic inverter with DC energy storage

作　　者：李淑霞[1] 孙玉坤[1,2] 张亮[2] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013 [2]南京工程学院电力工程学院,江苏南京211167

出　　处：《电源技术》2016年第2期384-387,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金资助项目(61074019);南京工程学院引进人才科研启动基金项目(YKJ201215)

摘　　要：针对光伏并网发电系统因输入波动所引发的功率不平衡问题,提出一种具有连续电流输入的储能型准Z源逆变器解决方案。详细推导了小信号激励下该逆变器的数学模型,采用母线电压控制和网侧电流控制的并网策略,构建了一套储能电池功率与电流双闭环控制的充放电管理方法,以实现对光伏电池输出功率波动的抑制。与此同时,在MATLAB/Simulink环境下搭建了直流储能型准Z源光伏并网系统的全套仿真模型及相关工况仿真研究,系统良好的静、动态仿真结果显示,所提出的设计方案与控制方法能够有效解决并网型光伏系统的功率不平衡问题。In order to overcome the power imbalance of grid-connected PV system that was caused by the input fluctuations, a kind of storage-type quasi-Z-source inverter with continuous current input was proposed. The inverter mathematical model under the incentive of small signal was deduced in detail, using capacitor voltage and grid current to achieve photovoltaic grid-connected. On the other hand,using double closed-loop control of energy storage battery power and current, the method of charging and discharging management was built to achieve the inhibition of photovoltaic battery output power fluctuation. Meanwhile, the complete simulation model of DC energy storage type quasi Z source photovoltaic grid system and related conditions were established under MATLAB/Simulink, good static and dynamic simulation results show that the proposed design scheme and control strategy solve the problem of PV system power imbalance effectively.

关 键 词：准Z源逆变器 小信号模型 功率平衡 

分 类 号：TM914[电气工程—电力电子与电力传动]