| 基于同步旋转变换及DFT的SVG指令电流检测法 |
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| 引用本文： | 陈丽兵,史丽萍,夏正龙,王攀攀.基于同步旋转变换及DFT的SVG指令电流检测法[J].电力系统保护与控制,2014,42(13):21-27. |
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| 作者姓名： | 陈丽兵 史丽萍 夏正龙 王攀攀 |
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| 作者单位： | 中国矿业大学信息与电气工程学院，江苏 徐州 221008;中国矿业大学信息与电气工程学院，江苏 徐州 221008;中国矿业大学信息与电气工程学院，江苏 徐州 221008;中国矿业大学信息与电气工程学院，江苏 徐州 221008 |
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| 基金项目： | 高等学校博士学科点专项科研基金（20110095110014） |
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| 摘 要： | 为使静止无功发生器(Static Var Generator,SVG)具备无功、谐波及不对称电流综合补偿能力,提出了一种基于同步旋转坐标变换及离散傅立叶变换(Discrete Fourier Transform,DFT)的SVG指令电流检测方法。该方法通过在同步旋转坐标系下进行递归离散傅立叶变换,能够实时检测出负载电流中的无功分量、不对称分量以及特征谐波。利用该方法只用一个控制器就能同时对两种特征谐波分量进行补偿,相对于其他方法运算量大大减小,便于工程实现。仿真和实验验证证明了该方法的有效性。
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| 关 键 词： | 静止无功发生器 选择性谐波补偿 指令电流检测 同步旋转坐标系 离散傅立叶变换 |
| 收稿时间： | 2013/9/15 0:00:00 |
| 修稿时间： | 2013/10/9 0:00:00 |
A reference current detection method based on synchronous reference frame transformation and DFT for SVG |
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| CHEN Li-bing,SHI Li-ping,XIA Zheng-long and WANG Pan-pan.A reference current detection method based on synchronous reference frame transformation and DFT for SVG[J].Power System Protection and Control,2014,42(13):21-27. |
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| Authors: | CHEN Li-bing SHI Li-ping XIA Zheng-long and WANG Pan-pan |
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| Affiliation: | School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221008, China;School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221008, China;School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221008, China;School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221008, China |
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| Abstract: | A reference current detection method based on synchronous reference frame transformation and discrete Fourier transform (DFT) is presented to make SVG provide synthetic compensation including reactive power compensation, harmonic compensation and unbalanced current compensation. By using recursive DFT algorithm in the rotating reference frame, the proposed method can be used to extract reactive currents, unbalanced currents and characteristic harmonic currents from the load currents in real time. This method allows the simultaneous compensation of two current harmonics with just one regulator, yielding a significant reduction of the computational effort and easy engineering implementation compared with other methods. The results of simulation and experiment show the validity of this method. |
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| Keywords: | static var generator selective harmonic compensation reference current detection synchronous reference frame discrete Fourier transform |
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