A Current Decomposition-Based Method for Computationally Efficient Implementation of Power Resolution Meters in Non- Sinusoidal Single-Phase Systems

Abstract

For non-sinusoidal single-phase systems, the classical apparent power has been divided into various components using different techniques. These power resolutions generally aim at to provide a tool for the accurate determination of the maximum power factor achievable with a passive compensator and to measure the load's nonlinearity degree. This paper presents a current decomposition-based methodology that can be employed for computationally efficient implementation of the widely recognized non-sinusoidal power resolutions. The proposed measurement method and the original expressions of the power resolutions are comparatively evaluated by considering their computational complexity. The results show that the proposed method has a significant advantage in terms of computational efficiency for the simultaneous measurements of the powers when compared with the original expressions. Finally, in this paper, a PC-based power meter is developed using the proposed measurement method via the LabVIEW programme.

Metrology and Measurement Systems

“…Definitions and discussions of terms can be found in several works [19][20][21][22][23][24][25][26][27] and in the IEEE Std. 1459 [28], and they will not be extensively repeated here; what is relevant is the definition and behaviour of harmonic nonactive power terms for distorted waveforms.…”