| 动态电压恢复器软件锁相技术 |
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| 引用本文： | 杨新华,郭志成.动态电压恢复器软件锁相技术[J].电力自动化设备,2011,31(11):56-59. |
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| 作者姓名： | 杨新华 郭志成 |
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| 作者单位： | 1. 兰州理工大学电气工程与信息工程学院,甘肃兰州730050;兰州理工大学甘肃省工业过程先进控制重点实验室,甘肃兰州730050
2. 兰州理工大学电气工程与信息工程学院,甘肃兰州,730050 |
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| 摘 要： | 对动态电压恢复器中常用的软件锁相环进行了研究,针对三相不平衡情况下负序分量对锁相环检测精度的影响,提出了基于数学形态滤波器的软件锁相环.通过选取适当的结构元素,结合形态学的基本运算,设计出低通形态滤波器来抑制由负序分量转换而来的2次谐波,提高锁相环的抗干扰能力和检测精度.理论分析和仿真实验都验证了其可行性,结果表明该方...
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| 关 键 词： | 动态电压恢复器 锁相环 滤波器 三相不平衡 |
Soft PLL technique of dynamic voltage restorer |
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| YANG Xinhua and GUO Zhicheng.Soft PLL technique of dynamic voltage restorer[J].Electric Power Automation Equipment,2011,31(11):56-59. |
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| Authors: | YANG Xinhua and GUO Zhicheng |
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| Affiliation: | 1(1.College of Electric and Information Engineering,Lanzhou University of Technology, Lanzhou 730050,China;2.Key Laboratory of Gansu Advanced Control for Industrial Processes,Lanzhou University of Technology,Lanzhou 730050,China) |
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| Abstract: | The soft PLL(Phase Locked Loop) widely used in the dynamic voltage restorer is studied.To avoid the impact of the negative sequence component on the accuracy of PLL under three-phase unbalance condition,a soft PLL based on the mathematical morphology filter is presented,which selects the appropriate morphologic structure elements and combines with the proper morphologic operators to design a low-pass morphological filter for restraining the second harmonic produced by the negative sequence component and improving the detection accuracy and anti-interference ability of PLL.Theoretical analysis and experimental results prove that,the interference is substantially attenuated and the operation of morphological filter is simple and fast,meeting the requirements of PLL detection. |
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| Keywords: | dynamic voltage restorer phase locked loops electric filters three-phase unbalance |
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