Results 231 to 240 of about 199,008 (263)

The instantaneous power theory on the rotating p-q-r reference frames

Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475), 1999
This paper proposed the rotating p-q-r reference frames where one instantaneous active power p, and two instantaneous reactive powers q/sub q/, q/sub r/ were defined in 3-phase 4-wire systems. The three power components are linearly independent, so that compensating for the two instantaneous reactive powers leads to control the two components of the ...
null Hyosung Kim, H. Akagi
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Advanced Control of Cascaded Multilevel Drives Based on P-Q Theory

IEEE International Conference on Electric Machines and Drives, 2005., 2005
In recent years, there has been significant development on the cascaded multilevel inverter wherein the series connection is accomplished by splitting the neutral point of the load and driving both ends with power converters. This splits the power between a "bulk" inverter supplying higher-voltage low-frequency power and a "conditioning" inverter ...
null Shuai Lu, K.A. Corzine, T.H. Fikse
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P-Q theory for shunt active filters using ramp comparator

2013 International Conference on Power, Energy and Control (ICPEC), 2013
Here a P-Q algorithm for shunt active power filters under stiff and non stiff source is described. The conventional current reference algorithms suffer from the disadvantage that it is not possible for harmonic compensation when the supply is unbalanced.
D. Joseph, N. Kalaiarasi
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Comparison of instantaneous reactive power p–q theory with theory of the current's physical components

Electrical Engineering, 2003
The comparison of the instantaneous reactive power (IRP) p–q theory with the theory of the current's physical components (CPC) presented in this paper provides the relationship between powers in both theories applied to three-phase, three-wire circuits with sinusoidal voltages and currents.
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Comparisons Between the p--q and p--q--r Theories in Three-Phase Four-Wire Systems

IEEE Transactions on Power Electronics, 2009
This paper presents a comparative analysis between results from applications of the p-q and the p-q-r theories in shunt active power filters for three-phase four-wire systems, discussing aspects related to the influence of the system voltage in the control methods that calculate the compensating currents. It is shown that in some cases, a preprocessing
M. Aredes, H. Akagi, E.H. Watanabe, E. Vergara Salgado, L.F. Encarnacao   +4 more
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Instantaneous power compensation in three-phase systems by using p-q-r theory

IEEE Transactions on Power Electronics, 2002
Three linearly independent instantaneous powers have been defined in the time domain in three-phase four-wire systems with the use of p-q-r theory. Any three-phase circuit can be transformed into three single-phase circuits by the p-q-r transformation Thus the instantaneous powers in any three-phase systems can be analysed as the same way of ...
Kim, Hyosung, Blaabjerg, Frede; id_orcid 0000-0001-8311-7412, Bak-Jensen, Birgitte, Choi, Jaeho   +3 more
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Modified p-q theory based control of solar PV integrated UPQC-S

2016 IEEE Industry Applications Society Annual Meeting, 2016
This paper proposes a modified p-q theory based control of solar photovoltaic array integrated unified power quality conditioner (PV-UPQC-S). The fundamental frequency positive sequence (FFPS) voltages are extracted using generalized cascaded delay signal cancellation (GCDSC) which is used in p-q theory based control to generate reference grid currents
Sachin Devassy, Bhim Singh 0001
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(p, q)-deformation of conformal field theory and two-point function

Il Nuovo Cimento B Series 11, 1994
We obtain a (p, q)-deformation of conformal field theory and find its two-point function from the (p, q)-deformed Ward-Takahashi identity.
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Misinterpretations of the Instantaneous Reactive Power p-q Theory

Abstract The Instantaneous Reactive Power p-q Theory was developed to provide theoretical fundamentals for active power filter control, with the claim that it is valid independently of the circuit situation as to structure and distortion.
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Coloring problems in graph theory: k-packings and (p,q)-colorings

A graph coloring is a map $\varphi$ from the vertices (or edges) of a graph $G$ to a set of colors. In Chapters 1 and 2, we provide preliminary information about graph theory and graph colorings and offer motivation behind the work. In Chapter 3, we consider the packing chromatic number of the $n$-layered infinite truncated square lattice, denoted ...
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