Improved Control Strategy Based on Splitting-Capacitor for Grid-Connected Inverter

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• 英文论文题名：Improved Control Strategy Based on Splitting-Capacitor for Grid-Connected Inverter
• 论文作者：Yifan Wang ; Hong Zheng ; Wen Zhu ; Ruoyin Wang
• 英文论文作者：Yifan Wang ; Hong Zheng ; Wen Zhu ; Ruoyin Wang ; School of Electrical and Information Engineering ; Jiangsu University ; Jiangsu Key Laboratory of Drive and Intelligent Control for Electric Vehicle
• 年：2017
• 作者机构：School of Electrical and Information Engineering,Jiangsu University;Jiangsu Key Laboratory of Drive and Intelligent Control for Electric Vehicle;
• 英文论文关键词：Active damping ; voltage feed-forward ; Weighted-Average Control(WAC) ; LCL grid-connected inverter
• 会议召开时间：2017-07-26
• 会议录名称：第36届中国控制会议论文集（A）
• 英文会议录名称：Proceedings of the 36th Chinese Control Conference（A）
• 语种：英文
• 分类号：TM464;TM53
• 学会代码：KZLL
• 会议名称：第36届中国控制会议
• 会议地点：中国辽宁大连
• 主办单位：中国自动化学会控制理论专业委员会
• 学会名称：中国自动化学会控制理论专业委员会
• 页数：5
• 文件大小：420k
• 原文格式：D
• 会议级别：全国

摘要

As a single current feedback method,the WAC(Weighted-Average Control) strategy achieves low distortion of the current with less steady-state error,and it also avoids the capacitance design problems that exist in traditional method based on splitting-capacitor.But the WAC strategy is limited to the interference from grid and an neglected resonant frequency.In this paper,an active damping method is used to improve the grid-connected current quality and restrain the resonance of system while degrading the control system.In addition,a grid voltage feed-forward control strategy is proposed to resist the grid disturbance which can not only change the control transfer function,but also have a negative effect on active damping method.Effectiveness and feasibility of the proposed strategy are verified by the simulation results.
As a single current feedback method,the WAC(Weighted-Average Control) strategy achieves low distortion of the current with less steady-state error,and it also avoids the capacitance design problems that exist in traditional method based on splitting-capacitor.But the WAC strategy is limited to the interference from grid and an neglected resonant frequency.In this paper,an active damping method is used to improve the grid-connected current quality and restrain the resonance of system while degrading the control system.In addition,a grid voltage feed-forward control strategy is proposed to resist the grid disturbance which can not only change the control transfer function,but also have a negative effect on active damping method.Effectiveness and feasibility of the proposed strategy are verified by the simulation results.

引文

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