| 引用本文: | 王 冲,郑建勇,葛 健,黄金军,刘孝辉.基于空间矢量滞环控制的Z源光伏并网逆变器[J].电力自动化设备,2011,31(12): |
| WANG Chong,ZHENG Jianyong,GE Jian,HUANG Jinjun,LIU Xiaohui.Z-source photovoltaic grid-connected inverter based onspace vector hysteresis control[J].Electric Power Automation Equipment,2011,31(12): |
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| 基于空间矢量滞环控制的Z源光伏并网逆变器 |
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王 冲1,2, 郑建勇1,2, 葛 健1,2, 黄金军1,2, 刘孝辉1,2
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1.东南大学 电气工程学院，江苏 南京 210096;2.苏州市电气设备与自动化重点实验室，江苏 苏州 215123
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| 摘要: |
| 提出了一种适用于Ｚ源三相光伏系统的定频电流滞环并网控制新方法。该方法首先基于电网电压空间矢量将复平面分为6个区域以实现线电流的解耦控制，再对线电流进行固定次数的定时比较以实现定频控制，解决了直通时间插入问题。该方法能实现单位功率因数运行，具有响应快速、精度高、抗干扰能力强、开关次数少、易于数字化实现等优点。与传统滞环控制相比，该方法对系统干扰及控制误差有较好的抑制能力，保持开关频率固定。通过仿真和样机上的实验验证，证明了该方法的可行性。 |
| 关键词: 光伏并网 逆变器 Z源 电流跟踪 空间矢量滞环 定频 |
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| 基金项目:国家863计划资助项目（2008AA052421） |
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| Z-source photovoltaic grid-connected inverter based onspace vector hysteresis control |
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WANG Chong1,2, ZHENG Jianyong1,2, GE Jian1,2, HUANG Jinjun1,2, LIU Xiaohui1,2
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1.Electrical Engineering School，Southeast University，Nanjing 210096，China;2.Laboratory of Electrical Equipment and Automation in Suzhou，Suzhou 215123，China
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| Abstract: |
| The gird-connection control with fixed frequency current-hysteresis is proposed for Z-source three-phase photovoltaic power system. The complex plane is divided into six sectors based on grid voltage space vectors to realize the decoupling control of line currents. The fixed frequency control is realized by the periodic comparison of line current with a fixed times，which avoids the problem of conducting time interposition. It runs with unity power factor，quick response，high accuracy，less switching times and simpler digital implementation. Compared with the traditional hysteresis control，it has less control error and better anti-interference ability. Its feasibility is proved by simulation and experiment. |
| Key words: photovoltaic grid-connection electric inverters Z-source current tracing space vector hysteresis fixed frequency |
