A comparative analysis of methods of measuring reactive power

Zhelbakov, I. N.; Serov, Andrey N.; Shatokhin, Alexander A.

doi:10.1007/s11018-011-9684-1

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…However, even in AC circuits, divergences on application of the Hilbert transform are found in current literature. Zhelbakov et al [15], comparing methods of measuring reactive power, concluded that the method based on the discrete Fourier transform of the current and voltage is the most accurate. The authors of the current work recognize that it is necessary to decompose the signals in Fourier series and to remove the DC component to determine the phase shift between voltage and current and find the reactive energy.…”

Section: Stage 3: Variation Of Active Power Through Inductance Settinmentioning

confidence: 99%

Active power measurement in arc welding and its role in heat transfer to the plate

Jorge

Gohrs²,

Scotti

2017

Weld World

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A contemporary paper claimed that a method using the resistance of impedance (active power) for arc power calculation is more accurate than the conventional approach, with consequences on the actual heat transfer to the plate. However, despite the comprehensive reasoning, no heat-related results are shown in this intriguing paper to support the claim. Thus, the aim of this work was to apply the proposed method for determining the weight of active power in the total arc power. A series of weldments was carried out, by using GTAW in constant and pulsed current modes and short-circuiting GMAW with different inductance settings. The effect of the active power on the heat transfers to the plate was assessed by both bead crosssection geometries and calorimetry. The results showed that even a significant fraction of active power of the total power was reached, no changes in bead geometry or heat input were found. A review of the assumptions used in the primal paper showed that an arc is better represented by an ER circuit than by an RLC circuit. As a conclusion, the arc as a reactance-free load presents no component such as nonactive power and the conventional approaches are accurate methods to measure arc power, representing the actual active power.

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Section: Stage 3: Variation Of Active Power Through Inductance Settinmentioning

confidence: 99%