摘要
基于自适应陷波器（adaptive notch filter,ANF）的电压同步信号提取方法能够在变频情况下准确提取基波频率和同步信号。但当电压频率在较大范围内变化时,如航空电源频率在360~800 Hz之间变化,会对ANF频率提取的动态性能产生影响。通过对ANF的动态性能进行理论分析和实验测试,发现其动态响应速度与电源频率呈现反比关系：电源频率越高,频率提取的响应速度越低。将频率检测结果引入到ANF的反馈环节中,提出一种改进的基于ANF的同步信号提取方法。该方法可消除电源频率变化对频率提取响应速度的影响,使变频情况下的频率检测结果具有频率响应自适应性。将改进方案在变频航空电源环境中进行仿真和实验研究,结果表明,所提方法能有效消除电源频率变化对动态响应速度的影响,提高动态性能,验证了理论分析的正确性。
The method of synchronization signal extraction which is based on adaptive notch filter（ANF） can accurately extract the fundamental frequency and synchronization signals under variable frequency circumstance.But when the frequency changes in a wide range,such as the aircraft power system in which the frequency changes from 360 Hz to 800 Hz,it would affect the dynamic performance of ANF.In this paper,it is found that there is an inverse relationship between the speed of the dynamical response of ANF and the line frequency according to the theoretical analysis and experimental tests.The higher the frequency,the lower the response speed of the frequency extraction.A novel ANF method is proposed in this paper.By introducing the measured frequency into the feedback part of the ANF,it can eliminate the influence caused by the line frequency.The proposed method was simulated and experimented in the environment of aircraft power system.The results proved that the proposed method can effectively avoid the impact on dynamic response which is caused by the line fundamental frequency,and verified the correctness of the proposed method.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第4期115-121,10,共7页
Proceedings of the CSEE
基金
全国优秀博士论文作者专项基金资助项目(200948)
新世纪优秀人才支持计划项目(NCET-09-0839)
输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512709210)
中央高校基本科研业务费资助(CDJXS11150008)~~
