Design of a new wide frequency measurement method for power system

Abstract

Aiming at the wide application and complex characteristics of the new power system, this paper proposes a design of broadband measurement method and realizes the application of broadband signal analysis and broadband measurement by improving the wavelet packet algorithm. As a multi-resolution analysis method widely used in the field of signal processing, the wavelet transform is unique in that it can perform local analysis in both time and frequency domains at the same time and has significant advantages in analyzing time-varying non-stationary signals. This paper will start from the algorithm requirements of electronic measurement devices based on the basic theory of wavelet transform, build a wide frequency measurement method, and comprehensively simulate and analyze the test signal. By combining the SVMD (Successive Variational Mode Decomposition) adaptive extraction algorithm with frequency band decomposition, the main sub-harmonic components in the frequency band are accurately extracted and measured, which verifies the feasibility and superiority of the algorithm.