Survey about Classical and Innovative Definitions of the Power Quantities Under Nonsinusoidal Conditions

Abstract

Abstract:Today, electric power and energy measurements are widely required, practically in all the research, industrial and consumer applications. Power measurements are of importance primarily for the test, monitoring and maintenance of energy supply networks and electric equipment. The measurement of both electric power and energy is a still open research problem in the electrical engineering community. Phenomena like harmonic distortion, noise, transients, over-voltages and voltage dips have increased the difficulty in achieving accurate measurements, compared with the case of sinusoidal signals. Many of the non-active power component definitions that have been proposed cannot be implemented in the traditional electro-mechanical or solid-state meters, but require the adoption of more expensive and time-consuming digital techniques; recently, some new approaches for the definition of power quantities have been investigated. In this paper, a survey of the classical and innovative definitions is proposed, with the aim of summarize the different points of view outlined by the researchers. A case study of power factor correction in nonsinusoidal conditions is also presented, to give a numerical comparison about the power quantities measured according to the various approaches.

Electrical power components decomposition of periodic polyharmonic current

“…The latter two indicators are not common in power industry. However, researchers have been recently using them to assess energy processes (Zhemerov and Tugay, 2015; Liu et al , 2019; Bucci et al , 2017; Bialobrzheskyi and Rod'kin, 2019). As noted in Kuvshinov (2013), electric energy is most efficiently transmitted by direct current with constant voltage.…”

Power losses and their properties for low range of a robot electric motor working conditions as the part of energy effectiveness research

“…Additionally the pattern signals were used for the correction of the fundamental frequencies values recognised by FFT if that was required. The waveforms of measured parameters became the waveforms of the total distortion and noise signals after extracting the fundamental signal harmonics from them (5). The resultant normalised distortion, noise and fundamental harmonic waveforms are shown in Fig.…”

“…The selection was affected by a pragmatic oriented goals, which were possibilities to keep the results being mostly comparable with measurements, performed by currently manufactured power analysers [6]. The most common alternative power calculation methods proper for unbalanced systems, nonsinusoidal, disturbed and noised conditions and mainly used for scientific works are Budeanu's, Fryze's and Czarnecki's methods [1,5,15,18,19].…”

Formulation of the Phasors of Apparent Harmonic Power: Application to Non-Sinusoidal Three-Phase Power Systems

“…Harmonic power has also been widely discussed in the literature [16][17][18], with most recent studies focusing on the development of active filters to mitigate the effects of harmonic components [19][20][21][22][23][24]. Other research focuses on the development of techniques to assess and differentiate the harmonic contribution of customers and networks [25,26].…”