Abstract：The fundamental frequency of aircraft power system varies from 360～800Hz. The frequency detection method for this application needs to overcome such large frequency variation. Although the frequency detection method based on adaptive notch filter(ANF) can extract the fundamentel frequency properly, the dynamical response is affected by the line fundamental frequency. The dynamical response of three ANF structures are analyzed first in this paper, theoretical and test results show that the dynamics of ANF is not only related to the ANF structure, but also related to the line frequency. The higher the line frequency, the longer the dynamical response time. Such property of ANF is not desirable for practical application. Then an improved frequency detection method based on ANF is proposed to overcome this problem, and it is general to all the three ANF structure discussed in this paper. The improved method can increase the dynamical response speed with higher line frequency. The experimental results verify the theoretical analysis and the proposed method.
杜雄, 王莉萍, 周雒维. 基于自适应陷波器的变频电源频率检测方法[J]. 电工技术学报, 2013, 28(4): 157-164.
Du Xiong, Wang Liping, Zhou Luowei. An ANF-Based Frequency Detection Method for Variable-Frequency Power Supply. Transactions of China Electrotechnical Society, 2013, 28(4): 157-164.
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