| 小功率光伏并网逆变控制系统的实现方式 |
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| 引用本文： | 张侃谕,张晓菊.小功率光伏并网逆变控制系统的实现方式[J].中国电力,2007,40(9):42-45. |
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| 作者姓名： | 张侃谕 张晓菊 |
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| 作者单位： | 上海大学,机电工程与自动化学院,上海,200072 |
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| 摘 要： | 分析光伏并网系统的原理及结构,系统DC/DC环节由SG3525控制,使其输出电压稳定。而交/直流(DC/AC)逆变器由单片机87C196MC对并网电流进行实时跟踪控制,采用双闭环控制方案实现与电网电压的同步。同时控制中加入了前馈控制,并对并网电流进行估算,以优化输出电流波形。给出系统并网电流跟踪控制的软件实现流程图。实验结果表明,并网电流波形较好。
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| 关 键 词： | 光伏并网系统 变换器 逆变器 双闭环控制 |
| 文章编号： | 1004-9649（2007）09-0042-04 |
| 修稿时间： | 2007-06-07 |
Realization of low power PV grid-connected control systems |
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| ZHANG Kan-yu,ZHANG Xiao-ju.Realization of low power PV grid-connected control systems[J].Electric Power,2007,40(9):42-45. |
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| Authors: | ZHANG Kan-yu ZHANG Xiao-ju |
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| Abstract: | The operation principle and structure of a photovoltaic grid-connected system were presented. The DC/DC converter is controlled by SG3525 to keep the output voltage steady. While the DC/AC inverter is controlled by micro-controller 87C196MC. The inverter output current is tracked, in real-time, by utilizing double closed-loop control scheme to have the same frequency and phase with utility grid voltage. Meanwhile, feed forward and forecast controls were adopted to optimize the output current waveform. Finally, the flow chart of the trace process of the inverter current was given in this paper. The result shows that the wave of grid-connected is good. |
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| Keywords: | PV grid-connection converter inverter double closed-loop control |
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