The adverse effects of excitation system VAr and power factor controllers

Hurley, J.D.; Bize, L.N.; Mummert, C.R.

doi:10.1109/60.815117

Cited by 58 publications

(43 citation statements)

References 4 publications

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“…The corresponding equation for a DGU under local control only can be easily derived by setting ∆Q cor to zero in (13). The whole set of equations can be written in compact matrix form as:…”

Section: B Derivation Of Sensitivity Matricesmentioning

confidence: 99%

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Voltage profile correction in distribution grids combining single- and two-level controllers

Bidgoli

Cutsem

2017

2017 IEEE Manchester PowerTech

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Abstract-A real-time control scheme is proposed to correct undesired voltages in distribution networks by adjusting the reactive powers produced by Dispersed Generation Units (DGUs). This is performed at two levels: locally, in DGU controllers, and centrally by a supervisory controller acting on some of the DGUs only. The centralized, discrete controller solves a multitime-step constrained optimization inspired of Model Predictive Control. Unacceptable voltage deviations are partially but rapidly corrected by the local controls. Further but slower corrections are applied by the upper level, taking advantage of the coordination between DGUs. This hybrid control is of practical interest where the deployment of the upper level control is not feasible or affordable over all DGUs. The proposed method effectiveness is demonstrated on a 75-bus test system.

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Section: B Derivation Of Sensitivity Matricesmentioning

confidence: 99%

“…The DGU models and parameters were taken from [13], [14], and simplified in accordance with the dynamics of interest in this work. The DGU capability curves are such that the units can operate with a power factor between 0.9 and 1.0 in both under-and over-excited modes.…”

Section: A Test Systemmentioning

confidence: 99%

Voltage profile correction in distribution grids combining single- and two-level controllers

Bidgoli

Cutsem

2017

2017 IEEE Manchester PowerTech

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“…This is modelled uses a droop slope, where the prevailing reactive power operating point acts as linear bias on the connection point target voltage. This archetypal scheme [25] promotes smoother co-operation between adjacent voltage controllers, and its merits for wind farms have been demonstrated [26].…”

Section: ) Generator Voltage Controller Implementationmentioning

confidence: 99%

Voltage Responsive Distribution Networks: Comparing Autonomous and Centralized Solutions

Cuffe

Keane

2015

IEEE Trans. Power Syst.

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“…There are two different modes of controlling the generator excitation system. One aims to maintain its terminal voltage (constant voltage control mode) while the other one aims to maintain its power factor (constant power factor control mode) [9]. The power factor control mode is usually adopted by independent producers to maximize the active power production.…”

Section: Synchronous Generatorsmentioning

confidence: 99%

Power Quality Investigation of Distribution Networks Embedded Wind Turbines

El-Sherif

Fetouh

Shaaban

2016

Journal of Wind Energy

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In recent years a multitude of events have created a new environment for the electric power infrastructure. The presence of smallscale generation near load spots is becoming common especially with the advent of renewable energy sources such as wind power energy. This type of generation is known as distributed generation (DG). The expansion of the distributed generators-(DGs-) based wind energy raises constraints on the distribution networks operation and power quality issues: voltage sag, voltage swell, voltage interruption, harmonic contents, flickering, frequency deviation, unbalance, and so forth. Consequently, the public distribution network conception and connection studies evolve in order to keep the distribution system operating in optimal conditions. In this paper, a comprehensive power quality investigation of a distribution system with embedded wind turbines has been carried out. This investigation is carried out in a comparison aspect between the conventional synchronous generators, as DGs are widely in use at present, and the different wind turbines technologies, which represent the foresightedness of the DGs. The obtained results are discussed with the IEC 61400-21 standard for testing and assessing power quality characteristics of grid-connected wind energy and the IEEE 1547-2003 standard for interconnecting distributed resources with electric power systems.

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The adverse effects of excitation system VAr and power factor controllers

Cited by 58 publications

References 4 publications

Voltage profile correction in distribution grids combining single- and two-level controllers

Voltage profile correction in distribution grids combining single- and two-level controllers

Voltage Responsive Distribution Networks: Comparing Autonomous and Centralized Solutions

Power Quality Investigation of Distribution Networks Embedded Wind Turbines

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