多水平集单周期电力系统频率测量方法及应用

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Abstract Aiming at the problem of the trade-off between accuracy and real-time performance in power system frequency estimation, this paper proposes a single-cycle frequency measurement method based on the multi-level set. Specifically, the high frequency interference signals are removed by the digital low-pass filter before reconstructing the sampling points around the threshold by using the cubic spline (not-a-knot) interpolation method, and then obtain the frequency estimation results through the optimal combination weighting method. This method is classified as time-domain frequency estimation, and is characterized by robust toward the accuracy of the measurement and low computational effort, which enables power system frequency to get accurate measurement in a single cycle. The reliability and effectiveness of this method are proved by the theoretical analysis as well as the simulation studies.

Key words： Frequency measurement cubic spline interpolation threshold optimal combination weighting method

Received: 22 January 2016 Published: 17 April 2017

PACS:

TM935

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	Articles by authors
	Zhang Zheng
	Wen He
	Li Fuhai
	Teng Zhaosheng
	Zhu Liang

Cite this article:

Zhang Zheng,Wen He,Li Fuhai等. Multi-Level Set Single-Cycle Power System Frequency Measurement Method and Its Application[J]. Transactions of China Electrotechnical Society, 2017, 32(7): 119-127.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I7/119

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