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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: In this article, a harmonic power-flow method is proposed for the steady-state initialization of a time-domain electromagnetic transient (EMT) program, which is implemented entirely in the time domain.
Abstract: Steady-state simulation plays a vital role in power system analysis and design. Over the past 25 plus years, various steady-state methods have been proposed. Most of these methods only deal with how to obtain steady-state waveforms of a system in an efficient manner. Only a few of them also take power-flow constraints into account. The majority of these “power-flow” methods are implemented in the frequency domain, which inevitably suffers from harmonic truncation errors. Moreover, the problem of model incompatibility will rise when they are used for the steady-state initialization of a time-domain electromagnetic transient (EMT) program. This paper presents a harmonic power-flow method, which is implemented entirely in the time domain. The proposed method essentially extends a time-domain steady-state method, called “shooting method” to include the power-flow constraints and to account for aggregate loads in the power-flow calculations.

41 citations

Proceedings ArticleDOI
01 Jan 2005
TL;DR: In this article, the traction system of an automatic subway is described using several graphical tools: transfer functions, bond-graph, causal ordering graph, power flow diagram and energetic macroscopic representation.
Abstract: In this paper the traction system of an automatic subway is described using several graphical tools: transfer functions, bond-graph, causal ordering graph, power flow diagram and energetic macroscopic representation. The aim of the paper is to highlight the interest of each tool for the analysis and the control of such a system

41 citations

Journal ArticleDOI
01 Mar 1996
TL;DR: In this paper, an analysis of the power regulation of a SMES unit under PWM switching control is presented, and the criteria for executing a power limit scheme to maintain power flows of the unit within a controllable range are described.
Abstract: This paper presents an analysis of the power regulation of a SMES unit under PWM switching control. The criteria for executing a power limit scheme to maintain power flows of the SMES unit within a controllable range are described. A general technique for design of power controllers based on the power limit scheme is developed. Two illustrative examples, being separate active and reactive power compensations of a model power system, are presented. The study indicates that active power priority control plays a dominant role in the power regulation of a SMES unit. Experimental results for two examples are also presented.

41 citations

Patent
13 Dec 2001
TL;DR: In this paper, a method of creating models for power estimation of a circuit comprising generating an input space for the circuit is presented, where the input space is separated into multiple power modes corresponding to regions that display similar power behavior.
Abstract: A method of creating models for power estimation of a circuit comprising generating an input space for the circuit. The input space is separated into multiple power modes corresponding to regions that display similar power behavior. Separate power models are generated for each of said multiple power modes. A power mode identification function is created that selects an appropriate power model from the separate power models based on the present and past values of the circuit inputs.

41 citations

01 Jan 2005
TL;DR: In this paper, the authors presented a solution of the optimal power flow (OPF) problem of a power system via an Ant Colony Optimization Meta-heuristic method to minimize the total fuel cost of thermal generating units and also conserve an acceptable system performance in terms of limits on generator real and reactive power outputs.
Abstract: This paper presents solution of optimal power flow (OPF) problem of a power system via an Ant Colony Optimization Meta-heuristic method. The objective is to minimize the total fuel cost of thermal generating units and also conserve an acceptable system performance in terms of limits on generator real and reactive power outputs, bus voltages, shunt capacitors/reactors, transformers tap-setting and power flow of transmission lines. Simulation results on the Algerian Electrical Network show that the Ant Colony Optimization method converges quickly to the global optimum.

41 citations


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