基于改进<em>k</em>值能量算子改进Chirp-<em>Z</em>变换的闪变包络参数提取

doi:10.19595/j.cnki.1000-6753.tces.170490

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Abstract

The outstanding advantage of energy operator is the quick and real-time extraction of flicker fluctuation signal, but it can be easily affected by noise, which restricts the signal demodulation accuracy. In order to reduce the error of measurement caused by noise,the demodulation characteristics of energy operators were studied,the method of rapid and accurate extraction of flicker envelope signal based on improved k-value energy operator was established. The envelope parameters errors were analyzed and corrected based on Rife-Vincent window improved Chirp-Z transform spectrum. Voltage flicker measurement algorithm using improved k-value energy operator based on improved Chirp-Z transform spectral correction was proposed and established. The simulation results show that the influences on voltage flicker measurement which are caused by the frequency of modulating waveform in change, multi-frequency of modulating waveform, the fundamental grid frequency fluctuations, harmonics and inter-harmonics and white noise, are all overcome by using this approach. The detection of flicker parameter under the noise interference has a higher accuracy in this paper.

Key words： Voltage flicker envelope improved k-value energy operator improved Chirp-Ztransform voltage flicker

Received: 24 April 2017 Published: 13 June 2018

PACS:

TM930.1

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	Li Lin
	Gao Yunpeng
	Zhang Yunqi
	Wu Cong
	Cao Yijia

Cite this article:

Li Lin,Gao Yunpeng,Zhang Yunqi等. Voltage Flicker Envelope Tracking Based on Improved k-Value Energy Operator and Improved Chirp-ZTransform[J]. Transactions of China Electrotechnical Society, 2018, 33(11): 2636-2646.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170490 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I11/2636

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