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Power-flow study

About: Power-flow study is a research topic. Over the lifetime, 8091 publications have been published within this topic receiving 155053 citations. The topic is also known as: load-flow study.


Papers
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Journal ArticleDOI
TL;DR: This article addresses the issue of modeling a local multi-carrier energy network by integrating a multiagent algorithm to perform the task, in a concurrent way to the other simulation tasks, and not only for the electric fluid but also for a number of additional energy carriers.

48 citations

Book ChapterDOI
01 Jan 2005
TL;DR: In this article, the authors discuss electric power quality, which generally applies to the goodness of the electric power supply, its voltage regulation, its frequency, voltage wave shape, current wave shape and the absence of momentary outages.
Abstract: This chapter discusses electric power quality, which generally applies to the goodness of the electric power supply, its voltage regulation, its frequency, voltage wave shape, current wave shape, level of impulses and noise, and the absence of momentary outages. Electric power quality studies generally span the entire electrical system, but the main points of emphasis are in the primary and secondary distribution systems. There are two main classes of electric power quality disturbances: the steady-state disturbance that lasts for a long period of time (and is often periodic) and the transient. Because power quality is often stated in terms of voltages and currents, the main instrumentation needed to assess power quality relates to bus voltages and line and load currents. In terms of voltages, usually bus voltages are measured using potential transformers because isolation from the power circuit is desirable and because power system voltages are usually too high to measure directly. Furthermore, the analysis techniques for power quality studies are explained in the chapter.

47 citations

Proceedings ArticleDOI
22 Jun 1997
TL;DR: In this article, a generalized theory of instantaneous reactive power for three-phase power systems was proposed, which is valid for sinusoidal or nonsinusoidal, balanced or unbalanced, three phase power systems with or without zero-sequence currents and/or voltages.
Abstract: This paper presents harmonic and reactive power compensation based on a generalized theory of instantaneous reactive power for three-phase power systems. This new theory gives a generalized definition of instantaneous reactive power, which is valid for sinusoidal or nonsinusoidal, balanced or unbalanced, three-phase power systems with or without zero-sequence currents and/or voltages. The properties and physical meanings of the newly defined instantaneous reactive power are discussed in detail. A harmonic and reactive power compensator based on the new theory for a three-phase harmonic distorted power system with zero-sequence components in the load current and/or source voltage is then used as an example to show harmonic and reactive power measurement and compensation using the new theory. Simulation and experimental results are presented.

47 citations

Journal ArticleDOI
TL;DR: In this article, the steady-state properties of a power distribution system with unbalanced loads, single-, two-, and three-phase lines and transformers of different connection types are analyzed.
Abstract: This paper analytically investigates the steady-state properties of a practical power distribution system with unbalanced loads, single-, two-, and three-phase lines and transformers of different connection types. It is shown that the three-phase power flow solution with feasible voltage magnitude for radial three-phase distribution networks with nonlinear load modeling always exists and is unique. Also, motivated by the practical use of three-phase power flow analysis as a basic tool for distribution system application functions, monotonic properties of the voltage magnitude at each node with respect to load changes are established. Implications and applications of these analytical results to distribution system analysis and design are discussed.

47 citations

Patent
20 Dec 1999
TL;DR: In this paper, maximum power point tracking is realized without employing a DC/DC converter by keeping optimal operating conditions of an inverter from the waveform of pulse voltage and current generated from solar cells when the instantaneous output power from the inverter varies over time.
Abstract: PROBLEM TO BE SOLVED: To solve the problem in an AC output solar cell power generating system for taking out maximum power from solar cells and superimposing it on the power from an AC power supply, that the power conversion loss is increased because power is converted twice when a DC/DC converter having a maximum power point tracking function is combined with an inverter in order to realize maximum power point tracking and total efficiency of the power generating system is lowered. SOLUTION: Maximum power point tracking is realized without employing a DC/DC converter by keeping optimal operating conditions of an inverter from the waveform of pulse voltage and current generated from solar cells when the instantaneous output power from the inverter varies over time.

47 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
202283
2021162
2020179
2019228
2018221