Results 11 to 20 of about 36,246,621 (297)
On the Use of the p-q Theory for Harmonic Current Cancellation with Shunt Active Filters
Advances in Electrical and Electronic Engineering, 2019 Discussion and mathematical proof on necessary and sufficient conditions for the application of the {p-q} theory for compensating the harmonic currents consumed by non-linear load using a shunt active filter are presented.
Federico Martin Serra +3 more
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p-q Theory power components calculations [PDF]
2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692), 2004 The "generalized theory of the instantaneous reactive power in three-phase circuits", proposed by Akagi et al., and also known as the p-q theory, is an interesting tool to apply to the control of active power filters, or even to analyze three-phase power system in order to detect problems related to harmonics, reactive power and unbalance.
Afonso, João L. +2 more
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Rook Theory, Generalized Stirling Numbers and $(p,q)$-Analogues [PDF]
The Electronic Journal of Combinatorics, 2004 In this paper, we define two natural $(p,q)$-analogues of the generalized Stirling numbers of the first and second kind $S^1(\alpha,\beta,r)$ and $S^2(\alpha,\beta,r)$ as introduced by Hsu and Shiue [Adv. in Appl. Math. 20 (1998), 366–384]. We show that in the case where $\beta =0$ and $\alpha$ and $r$ are nonnegative integers both of our $(p,q ...
Jeffrey B. Remmel, Michelle L. Wachs
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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.
Czarnecki, L. S.
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WAYS OF P-Q THEORY MODERNIZATION FOR WORK IN NON-SINUSOIDAL UNBALANCED VOLTAGE CONDITIONS
Electrical engineering & Electromechanics, 2013 Two different techniques of P-Q instantaneous power theory mathematical apparatus modernization for shunt active filters are analyzed. Both techniques are equal in nature while different in implementation.
V.S. Kozlov +2 more
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Compensation of active filter using p-q theory in photovoltaic systems
Memories - Materials, Devices, Circuits and SystemsThis work proposes an active shunt filter design for grid-connected solar systems, utilizing the p-q instantaneous power theory technique to minimize grid harmonics and reduce reactive power. As a result, the total harmonic distortion (THD) is decreased,
Farzane Soleimani Rudi +1 more
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On R4 threshold corrections in type IIB string theory and (p, q)-string instantons [PDF]
Nuclear Physics B, 1997 We obtain the exact non-perturbative thresholds of $R^4$ terms in IIB string theory compactified to eight and seven dimensions. These thresholds are given by the perturbative tree-level and one-loop results together with the contribution of the D-instantons and of the (p,q)-string instantons. The invariance under U-duality is made manifest by rewriting
Kiritsis, Elias, Pioline, Boris
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Coloring problems in graph theory: k-packings and (p,q)-colorings [PDF]
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 ...
McRoberts, Christian
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IRP P-Q THEORY FOR ACTIVE POWER FILTERS. LIMITATION OF APPLICATION [PDF]
Electrical Engineering and Power Engineering, 2013 The articled is devoted to «p-q» instantaneous reactive power theory. Two facts of critics of this power theory is analyzed. The first critical fact is about wrong current compensation in case of active current filter which works in power net with unbalanced voltage.
Sinolitsyy, A. F. +2 more
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The solution of some persistent $p : -q$ resonant center problems [PDF]
Electronic Journal of Qualitative Theory of Differential Equations, 2018 The notion of $p:-q$ resonant center was introduced recently and studied by several authors. In this paper we generalize the notion of a persistent center to a persistent $p:-q $ resonant center and find conditions for existence of a persistent $p:-q ...
Maja Zulj +2 more
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