中山大学学报自然科学版 ›› 2011, Vol. 50 ›› Issue (1): 58-63.

• 研究论文 • 上一篇    下一篇

光伏并网功率调节系统的输出电流无静差跟踪控制

周龙华1,2,王 飞1   

  1. (1.中山大学电力电子及控制技术研究所,广东 珠海 519082; 2.中山大学数学与计算科学学院,广东 广州 510275)
  • 收稿日期:2010-05-04 修回日期:1900-01-01 出版日期:2011-01-25 发布日期:2011-01-25
  • 通讯作者: 王飞

Zero Steadystate Error Tracking Control on Output Current of Gridconnected Photovoltaic Power Conditioning System

ZHOU Longhua 1,2, WANG Fei 1   

  1. (〖JP3〗1. Institute of Power Electronics and Control Technologies, Sun Yatsen University, Zhuhai 519082,China;〖JP〗〖JP3〗2. School of Mathematics and Computational Science, Sun Yatsen University, Guangzhou 510275, China)
  • Received:2010-05-04 Revised:1900-01-01 Online:2011-01-25 Published:2011-01-25

摘要: 逆变器输出电流的跟踪控制是光伏并网功率调节(PVPC)系统的重点,首先对三相PVPC进行数学建模并分析其动态结构,引出电网电压扰动的前馈补偿策略。然后进一步简化系统的电流闭环,分析PI控制校正技术后,引入无静差的电流跟踪技术,使得系统电流输出实时跟踪并网指令电流,电网电压的扰动影响为零。最后,为了验证提出的控制方案,进行了仿真实验与实验室样机实验,表明了方案的合理性、可靠性和实用性。

关键词: 光伏并网, 电流闭环, 无静差跟踪

Abstract: The output current tracking control for inverter is crucial for gridconnected photovoltaic power conditioning (PVPC) system. Firstly, the work builds the threephase PVPC model and analyzes its dynamic structure, introduces the feedforward compensation strategy for grid voltage disturbance. The current closedloop system is simplified to analyze the PI control correction technology. A zero steadystate error traking technology is presented for inverter output currents to make the system output current track the gridconnected order current in real time, eliminating the effect of grid voltage disturbance. Finally, simulation and prototype experiment results validate that the control strategy is reasonable, reliable and practical.

Key words: gridconnected photovoltaic, current closeloop, zero steadystate error tracking

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