| 基于dq变换的三相不平衡电压暂降检测方法 |
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| 引用本文： | 刘云潺,黄纯,欧立权,赵伟明.基于dq变换的三相不平衡电压暂降检测方法[J].电力系统及其自动化学报,2007,19(3):72-76. |
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| 作者姓名： | 刘云潺 黄纯 欧立权 赵伟明 |
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| 作者单位： | 湖南大学电气与信息工程学院,长沙,410082 |
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| 摘 要： | 目前动态电压恢复器(Dynamic Voltage Restorer,DVR)装置中常用的dq变换检测法只适用于三相对称扰动,故提出了一种可用于三相不平衡电压暂降的检测方法。该方法首先对信号进行双dq变换和无时延的单相dq变换,变换后的量经由形态低通滤波器滤波后,可分别求得电压基波正序、负序和零序分量,继而推导计算出电压暂降的特征值,即各相暂降幅值、持续时间和相位跳变角。仿真结果验证了该方法的正确性,分析结果表明这种方法具有很好的实时性,适合DVR实时检测的需要。
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| 关 键 词： | 三相不平衡电压暂降 双dq变换 形态滤波器 动态电压恢复器 |
| 文章编号： | 1003-8930（2007）03-0072-05 |
| 收稿时间： | 2006-08-22 |
| 修稿时间： | 2006-08-222006-10-23 |
Method for Unbalanced Voltage Sags Detection Based on dq Transform |
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| LIU Yun-chan,HUANG Chun,OU Li-quan,ZHAO Wei-ming.Method for Unbalanced Voltage Sags Detection Based on dq Transform[J].Proceedings of the CSU-EPSA,2007,19(3):72-76. |
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| Authors: | LIU Yun-chan HUANG Chun OU Li-quan ZHAO Wei-ming |
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| Affiliation: | College of Electrical and Information Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | The voltage sag detection based on dq transform is usually used in dynamic voltage restorer(DVR),but it is only applicable to symmetrical voltage sags.A method for unbalanced voltage sags detection is presented,which can identify unbalanced voltage sags characteristics,such as magnitude,duration and phase-angle jump.The positive,negative and zero sequence can be obtained by using dq transform and morphological filter,and then voltage sags characteristics can be calculated.Simulation results prove that the proposed method is correct and it has better dynamic performance.The real time requirement of DVR can be satisfied with the proposed method. |
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| Keywords: | unbalanced voltage sags double dq transform morphological filter dynamic voltage restorer |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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