| 基于微分几何的微网Z源逆变器并网控制 |
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| 引用本文： | 陈艳,周林,雷建,甘元兴.基于微分几何的微网Z源逆变器并网控制[J].电工技术学报,2012(1):17-23. |
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| 作者姓名： | 陈艳 周林 雷建 甘元兴 |
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| 作者单位： | 重庆大学输配电装备及系统安全与新技术国家重点实验室;重庆市电力公司北碚供电局 |
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| 基金项目： | 输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512709211);中央高校基本科研业务费资助项目(CDJXS10151151) |
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| 摘 要： | 针对应用于微网系统中的Z源逆变器及其并网控制研究,以光伏系统为例,根据Z源变换器本身具有的非线性特性,建立Z源逆变器直流链及逆变侧的仿射非线性模型,利用微分几何基本工具,构造恰当的坐标变换和预反馈,将原非线性系统精确线性化,然后对该系统进行线性最优控制器设计。该逆变器集最大功率点跟踪、升降压和并网发电等功能于一体。仿真...
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| 关 键 词： | 微网 微分几何 Z源逆变器 并网 光伏系统 |
Research on the Z-Source Inverter Grid-Connected Control of Micro-Grid System Based on Differential Geometry |
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| Chen Yan,Zhou Lin,Lei Jian,Gan Yuanxing.Research on the Z-Source Inverter Grid-Connected Control of Micro-Grid System Based on Differential Geometry[J].Transactions of China Electrotechnical Society,2012(1):17-23. |
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| Authors: | Chen Yan Zhou Lin Lei Jian Gan Yuanxing |
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| Affiliation: | 1.State Key Laboratory of Transmission & Distribution Equipment and Power System Safety and New Technology Chongqing University Chongqing 400030 China 2.Beibei District Supply Bureau of Chongqing Electric Power Corp.Chongqing 400700 China) |
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| Abstract: | For the Z-source inverter used in the distributed generation system and its grid-connected control,the paper takes the photovoltaic system as the example.According to the nonlinear characteristic of Z-source inverter,the affine model of Z-source inverter DC-link and AC side are created.Based on the differential geometry,the proper coordinate transformation and pre-feedback are constructed,and the original nonlinear system is exact linearized,then designed linear optimal controller for the system.The inverter integrates three functions including maximum power point tracking(MPPT),step-up/down DC-side voltage and output grid-connected.The simulation and experiment are performed to validate the strategies: when input condition of the photovoltaic array changes,this method has better performance than PI control. |
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| Keywords: | Micro-grid differential geometry Z-source inverter grid-connected photovoltaic |
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