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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 paper, the fundamental relations connecting torques, speeds and power flows for a general planetary drive mechanism are derived from the first principles for kinematic and power flow analysis.

38 citations

Patent
12 Mar 1999
TL;DR: In this article, phase detection was used to automatically and substantially equalize the currents supplied to a load by each of the variable-frequency power sources, and to cancel a ripple component of the input current drawn by the system.
Abstract: A system and a method may use variable-frequency power sources for supplying power to a load The system and method use phase detection in order to automatically and substantially equalize the currents supplied to a load by each of the variable-frequency power sources, and to cancel a ripple component of the input current drawn by the system First and second power sources supply power to the load The power sources have a similar relationship between their respective variable switching frequencies and the power that they supply to the load First and second switching frequencies of, respectively, the first and second power sources are locked to one another using phase detection to substantially equalize the power supplied to the load by each power source The system and method are advantageously utilized to provide a power factor correction front-end for a switch-mode power supply Power sources with non-linear and/or inverse relationships between power supplied and switching frequency can be used In alternate embodiments power from series power sources is equalized by equalizing voltages supplied by each power source to a load

38 citations

Proceedings ArticleDOI
17 Oct 2013
TL;DR: In this paper, a generic power system model is presented in order to comprehend the wind integration studies with different penetration scenarios.
Abstract: High wind power penetration levels into power systems requires an appropriate power system model when assessing impact on the overall system stability. The model should capture the wide range of dynamics related to the wind integration studies, such as voltage control, synchronizing power control, inertial response, frequency control, damping of electromechanical oscillations, balanced and unbalanced fault management, etc. Hence, the power system components: conventional power plants with controls, transmission lines, transformers and loads should be represented accurately to achieve realistic power system characteristics. Additionally, the power system model should be simple and computationally manageable in order to simulate multiple scenarios with different control parameters in a reasonable time. In this paper, a generic power system model is presented in order to comprehend the wind integration studies with different penetration scenarios.

38 citations

Proceedings ArticleDOI
16 May 2008
TL;DR: In this article, a wide range active and reactive power flow controller is designed to operate the inverter in pure leading, pure lagging, and the mix with active/reactive power conditions.
Abstract: A wide-range active and reactive power flow controller is designed to operate the inverter in pure leading, pure lagging, and the mix with active and reactive power conditions. The key to achieving lagging power flow control is to ensure sufficiently high enough dc bus voltage to avoid duty cycle saturation. The key to achieving precision power flow control for a wide-range of power level is to adopt the quasi proportional resonant controller for the current loop and the admittance compensator to cancel the grid voltage induced negative power flow. In this paper, the current loop transfer function has been systematically derived for the controller design purpose. Phasor analysis was adopted to explain the need of dc bus voltage requirement. A 5-kVA grid-tie fuel cell inverter was used as the platform to show current loop controller design and admittance compensation. The proposed controller has been simulated, and the same parameters have been used for a digital signal processor based controller. Both simulation and hardware experimental results well agree with the theoretical analysis.

38 citations

Proceedings ArticleDOI
05 Sep 2004
TL;DR: In this article, an application of particle swarm optimization (PSO) in solving the load flow problem as an optimization problem is presented, which is usually solved using conventional numerical techniques like Newton-Raphson (NR) or GaussSeidel (GS) methods.
Abstract: Load flow (LF) is an important tool in the planning and operation of power systems. It is usually solved using conventional numerical techniques like Newton-Raphson (NR) or GaussSeidel (GS) methods. This paper presents an application of particle swarm optimization (PSO) in solving the load flow problem as an optimization problem. Examples on test systems are given to demonstrate the validity and applicability of the proposed method.

38 citations


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