| 引用本文: | 王艳,郝良霞,刘美岑,焦彦军.基于正交滤波函数的快速窄带滤波算法[J].电力系统保护与控制,2018,46(3):35-42.[点击复制] |
| WANG Yan,HAO Liangxia,LIU Meicen,JAO Yanjun.Fast narrow-band filtering algorithm based on orthogonal filter functions[J].Power System Protection and Control,2018,46(3):35-42[点击复制] |
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| 摘要: |
| 在分析窄带滤波算法的基波提取能力和响应时延特性的基础上，结合正交滤波算法的滤波性能，提出了一种基于正交滤波函数的提取基波分量的快速窄带滤波算法。采用两个与数据窗长有关的三角函数作为正交滤波函数，求得其不同数据窗长下相量的实虚部，推导得到各数据窗长下窄带滤波器初值的计算式，从而求取窄带滤波器初值，缩短其响应时延。该滤波算法滤波效果好，响应速度快，能够大大提高电网保护和控制系统的快速性。 |
| 关键词: 窄带滤波 正交滤波器 初值 响应时间 |
| DOI：10.7667/PSPC170051 |
| 投稿时间：2017-01-10修订日期：2017-11-24 |
| 基金项目:国家自然科学青年基金资助项目(51307059);中共高校基本科研业务费专项资金资助(2016MS90) |
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| Fast narrow-band filtering algorithm based on orthogonal filter functions |
| WANG Yan,HAO Liangxia,LIU Meicen,JAO Yanjun |
| (School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China) |
| Abstract: |
| Based on the analysis of the ability to extract fundamental wave and the response time delay characteristics of narrow-band filtering algorithm, and combined with the filtering performance of orthogonal filter algorithm, a fast narrow-band filtering algorithm based on orthogonal filter functions is proposed to extract the fundamental component. Two trigonometric functions related with the length of data window are adopted as orthogonal filter functions, and the real and imaginary parts of phasors in their different data window lengths are obtained. The calculation formula of narrow-band filter initial value in each data window length is derived, thereby seeking the initial value of narrow-band filter to shorten the response time delay. The filtering algorithm has good filtering effect and fast response time, and can greatly improve the rapidity of electrical protection and control systems. This work is supported by National Natural Science Youth Foundation of China (No. 51307059) and Fundamental Research Funds for the Central Universities (No. 2016MS90). |
| Key words: narrow-band filtering orthogonal filters initial value response time |
