| 基于相位差校正的电网频率高精度测量 |
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| 引用本文： | 贺建闽,黄治清. 基于相位差校正的电网频率高精度测量[J]. 电力系统保护与控制, 2005, 33(14): 43-47 |
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| 作者姓名： | 贺建闽 黄治清 |
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| 作者单位： | 西南交通大学电气工程学院,四川 成都 610031 |
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| 摘 要： | 电网频率是重要的电能质量指标之一,频率的高精度测量同时也是许多应用技术的基础。该文介绍一种基于相位差校正的电网频率测量方法。理论分析和仿真表明这种方法具有较强的抗干扰性,其频率测量精度主要与信噪比、频率偏差及采样数据的长度有关。该方法原理简单、运算速度快、校正精度高,能够满足电力系统测量实时性要求。
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| 关 键 词： | 电网频率测量 相位差校正 离散傅立叶变换 |
| 文章编号： | 1003-4897(2005)14-0043-05 |
| 收稿时间： | 2004-11-20 |
| 修稿时间： | 2004-12-23 |
Power system frequency high-precision measurement based on phase difference correction method |
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| He JianMin;Huang ZhiQing. Power system frequency high-precision measurement based on phase difference correction method[J]. Power System Protection and Control, 2005, 33(14): 43-47 |
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| Authors: | He JianMin Huang ZhiQing |
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| Abstract: | Power system frequency is one of the most important indexes of power quality. The high-precision frequency measurement is the base of a great deal of applied technologies. In this paper, a phase difference correction method is presented to correct the power frequency. This method has strong anti-disturbance capability by theoretical analysis and simulation. Frequency measuring accuracy is mainly related to signal-to-noise ratio (SNR), frequency excursion and the length of sampled data. With the characteristic of principle simple, high speed and accuracy, the method can meet the need of real-time frequency measurement in power system. |
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| Keywords: | power system frequency measurement phase difference correction method DFT |
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