应用于光伏并网系统准Z源逆变器的滑模控制策略

田莉; 杨潇洁

doi:10.19912/j.0254-0096.tynxb.2021-1242

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (3) : 443-449. DOI: 10.19912/j.0254-0096.tynxb.2021-1242

应用于光伏并网系统准Z源逆变器的滑模控制策略

田莉, 杨潇洁

作者信息 +

SLIDING MODE CONTROL STRATEGY FOR QUASI-Z-SOURCE INVERTER IN PV GRID-CONNECTED SYSTEM

Tian Li, Yang Xiaojie

Author information +

文章历史 +

摘要

针对光伏并网系统可能产生的太阳辐照度变化、系统振荡、抗干扰能力和抗谐波能力不理想等问题,提出电容电压外环采用含有状态变量的积分补偿滑模控制策略以保证Z源电容电压相对稳定,不产生超调和不出现失真;并网电流内环采用改进的切换函数设计滑模控制器,以削弱系统抖振,并网效果得到提高。通过Matlab/Simulink平台建立仿真模型。仿真结果表明,相比PI（比例积分）和PR（比例谐振）控制策略,该方法可增强并网系统的全局鲁棒性,能有效提高系统的动态响应速度和并网电能的质量,且能抑制电网电压的谐波信号。

Abstract

Aiming at the problems such as light intensity change, system oscillation, anti-interference ability and anti-harmonic ability of the photovoltaic grid-connected system, an integral compensation sliding mode control strategy containing state variables is designed for capacitor voltage outer loop to ensure the relative stability of the capacitor voltage without over-harmonic and distortion. A sliding mode controller based improved switching function for the inner loop of grid-connected current to reduce chattering and improve grid-connected effect. Matlab/Simulink platform simulation results verify that the proposed method outperforms the PI and proportional resonance (PR) control strategy, and the proposed method can enhance the global robustness of the grid-connected system, effectively improve the dynamic response speed of the system and the quality of the grid-connected power, and can suppress the harmonic signal of the grid voltage.

导出引用

田莉, 杨潇洁. 应用于光伏并网系统准Z源逆变器的滑模控制策略[J]. 太阳能学报. 2023, 44(3): 443-449 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1242

Tian Li, Yang Xiaojie. SLIDING MODE CONTROL STRATEGY FOR QUASI-Z-SOURCE INVERTER IN PV GRID-CONNECTED SYSTEM[J]. Acta Energiae Solaris Sinica. 2023, 44(3): 443-449 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1242

中图分类号： TM7

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