一种基于频率自适应多阶准同步算法的直流动态电能计量方法

doi:10.3969/j.issn.1000-1158.2025.01.08

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Abstract In the new power system， the rapid development of DC power distribution technology such as electric vehicle charging， photovoltaic， energy storage had put forward higher requirements for the accuracy of DC energy measurement. The quasi-synchronous algorithm was one of the most effective algorithms for solving aperiodic signal measurement， and can reduce the impact of dynamic frequency fluctuations on measurement accuracy by increasing the recursive valence. Aiming at the random time-varying dynamic characteristics of ripple components in DC signals， a new DC dynamic energy measurement method based on frequency adaptive multi-order quasi-synchronization algorithm was proposed. The instantaneous frequency of DC dynamic signal was quickly locked based on finite impulse response filtering and differential zero cross frequency monitoring method， and the average periodic sampling number and sampling frequency of the quasi-synchronous algorithm were dynamically adjusted according to the instantaneous frequency， so that the error of the adaptive quasi-synchronous algorithm was about equal to the n power of the reciprocal of the number of periodic wave samples （n is the quasi-synchronous iteration number）. It achieved the accurate tracking and separation of DC energy and ripple energy， and effectively improved the accuracy of DC energy measurement under complex dynamic conditions. In order to verify the performance of the algorithm， a DC dynamic power test was carried out. The test results showed that the accuracy of DC and active power was better than 0.01%， and the accuracy of ripple power was better than 0.1%， which can be applied to the electric energy measurement under DC dynamic conditions.

Key words： electrical measurement DC energy measurement frequency adaptive quasi-synchronous dynamic measurement ripple

Received: 19 May 2024 Published: 14 January 2025

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TB97

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	Articles by authors
	CEN Wei
	DUAN Yongxian
	DUAN Xiaomeng
	LI Xiaojun
	ZHANG Zhijie
	GENG Ailing

Cite this article:

CEN Wei,DUAN Yongxian,DUAN Xiaomeng, et al. A DC Dynamic Energy Measurement Method Based on Frequency Adaptive Multi⁃order Quasi⁃Synchronization Algorithm[J]. Acta Metrologica Sinica, 2025, 46(1): 42-52.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2025.01.08 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2025/V46/I1/42

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