浙江大学学报（理学版）2012，Vol.39Issue(3)：297-302,6.DOI:10.3785/j.issn.1008-9497.2012.03.013
一种频率自适应的同步相位与对称分量检测方法
A method of frequency adaptive detecting for synchronous phase and instantaneous symmetrical components
陈海荣 1刘子坚 1屠卿瑞2
作者信息
- 1. 金华职业技术学院,浙江金华321017
- 2. 浙江大学,浙江杭州310027
- 折叠
摘要
Abstract
Under AC power system fault conditions, detecting synchronous phase and instantaneous symmetrical components quickly and accurately is an important part of the control and protection system of power electronic e-quipment. In this paper, the influence of negative sequence voltage components on the PLL's detecting performance is studied, a novel method based on frequency adaptive for detecting instantaneous symmetrical components is proposed. In this method, the theory of instantaneous symmetrical components in <r/β Frame for detecting symmetrical components is adopted, the phase shift method of 90* based on second order generalized integrator is realized, q axis component of the fundamental positive voltage is used as input of the PLL and the angular frequency of PLL is used as resonant frequency of the circuit of phase shift. In this paper, implementation mechanism of the proposed method is analyzed. Block diagram of the detecting circuit is given and is also verified by experimental research. Experimental results show that the proposed method not only can detect instantaneous symmetrical components accurately under unbalanced source voltage but also can eliminate the influence of frequency diversification on detecting instantaneous symmetrical components.关键词
电力电子/锁相环/瞬时对称分量/广义二阶积分器/谐振频率Key words
power electronic/phase lock loop(PLL)/instantaneous symmetrical components/second order generalized integrator/resonant frequency分类
数理科学引用本文复制引用
陈海荣,刘子坚,屠卿瑞..一种频率自适应的同步相位与对称分量检测方法[J].浙江大学学报（理学版）,2012,39(3):297-302,6.
