Results 181 to 190 of about 602 (214)

Reactive power generation and control by thyristor circuits

1976 IEEE Power Electronics Specialists Conference, 1976
Generally, static var generators function as variable reactances (capacitive or inductive impedances) or controllable ac current and voltage sources. Possible methods of var generation and control by static thyristor circuits are reviewed, and new approaches are described in which power frequency changers (cycloconverters) are employed.
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Reactive power control in a metro system

IEEE Spectrum, 1966
The reactive power problem will become intensified in the future with the increasing use of EHV overhead lines and high-voltage cable in densely populated areas. Generators alone, with their underexcited limitations during light load periods, may not have sufficient capability to control voltages in some systems in which substantial amounts of high ...
W. J. Balet, R. L. Webb
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Fuzzy Control on Voltage/Reactive Power in Electric Power Substation

2009
A fuzzy method using in voltage and reactive power control in electric substation is proposed based on the improved 17 Areas Method derived from 9 Areas Method. A simulation model is founded with fuzzy control rules used the Matlab simulink. The simulation results indicate that voltage of the model with fuzzy control is less fluctuating and much ...
Xiuhua Wu, Jun-cheng Wang, Ping Yang, Zai-lin Piao   +3 more
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Reactive power control by genetic algorithm

2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077), 2002
This paper presents a new approach to optimal voltage and reactive power control based on a genetic algorithm (GA), and attempts to shorten the time by use of the GA which calculates the control procedure. For this purpose, a network is decomposed into subsystems by means of region/area information, and the control times of the controller are ...
H. Aoki, Y. Mizutani
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Reinforcement Learning for Reactive Power Control

IEEE Transactions on Power Systems, 2004
This paper presents a Reinforcement Learning (RL) method for network constrained setting of control variables. The RL method formulates the constrained load flow problem as a multistage decision problem. More specifically, the model-free learning algorithm (Q-learning) learns by experience how to adjust a closed-loop control rule mapping states (load ...
J.G. Vlachogiannis, N.D. Hatziargyriou
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Voltage and Reactive Power Control

2022
John Fuller, Pamela Obiomon, Samir I. Abood   +2 more
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Optimal Reactive Power Dispatch With Discrete Controllers Using a Branch-and-Bound Algorithm: A Semidefinite Relaxation Approach

IEEE Transactions on Power Systems, 2021
Juan Camilo Lopez, Marcos J Rider
exaly  

Equipment for Voltage and Reactive Power Control

2015
Chapter 1 explained how voltage support requires reactive power control. In this chapter, we describe in detail the main equipment in power systems that are able to deliver or absorb the reactive power through particular aspects of control as they relate to voltage and reactive power.
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High-Voltage Reactive-Power Compensators Based on Semiconductor Voltage Controllers

Russian Electrical Engineering, 2023
D I Panfilov, M G Astashev, Panfilov D I
exaly  

Reactive power control a panacea to power stability

International Journal of Academic Research, 2012
M. Olubiwe, F.K. Opara, E.N.C. Okafor
openaire   +1 more source