Investigation of various generator reactive power reserve (GRPR) definitions for online voltage stability/security assessment

Leonardi, Bruno; Ajjarapu, Venkataramana

doi:10.1109/pes.2008.4596235

Cited by 55 publications

(41 citation statements)

References 7 publications

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“…A nonlinear relationship between the GRPR and the VSMs and the voltage limits violations is investigated in [20].…”

Section: Fundamentals On Reactive Power Reservementioning

confidence: 99%

“…and Q * i in (20) and (24) are the voltage and reactive power of the PV and PQ generators at the operating point, respectively. These two equality constraints in addition to the inequality constraints (21) and (22) correlate the current operating point and the collapse point while considering the complementarity constraints mentioned by (5)-(7).…”

Section: Simultaneous Optimization Of Egrpr For Current Operating Andmentioning

confidence: 99%

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Preventive reactive power management for improving voltage stability margin

Alizadeh‐Mousavi

Bozorg

Cherkaoui

2013

Electric Power Systems Research

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Voltage stability imposes important limitations on the power systems operation. Adequate voltage stability margin needs to be obtained through the appropriate scheduling of the reactive power resources. The main countermeasures against voltage instability could be distinctly classified into preventive and corrective control actions. This paper proposes a preventive countermeasure to improve the voltage stability margin through the management of the reactive power and its reserve. The voltage and reactive power management is studied from the generator's point of view to maximize effective generator reactive power reserve (EGRPR). Detailed model of the generators including the armature and field current limits, as well as the switch mode between the voltage control and the reactive power limitations are considered to maximize the reactive power capability of the generators in emergency states. One-stage and two-stage optimization approaches are utilized to find the optimum solution. The proposed optimization procedure is applied on a 6-bus system and the New England 39-bus system to illustrate the effectiveness of the method.

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“…A nonlinear relationship between the GRPR and the VSMs and the voltage limits violations is investigated in [20].…”

Section: Fundamentals On Reactive Power Reservementioning

confidence: 99%

Section: Simultaneous Optimization Of Egrpr For Current Operating Andmentioning

confidence: 99%

Preventive reactive power management for improving voltage stability margin

Alizadeh‐Mousavi

Bozorg

Cherkaoui

2013

Electric Power Systems Research

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“…There is also a need to find a relationship between the reactive power reserves and voltage security. This issue was elaborated in [38], where various reactive power reserve definitions are discussed. The work presented in [39] suggests utilization of statistical multi-linear regression models to transform variations in reactive power reserves into direct information about voltage stability margin.…”

Section: B Reactive Reserve Monitoringmentioning

confidence: 99%

A short survey of methods for voltage instability detection

Glavić

Cutsem

2011

2011 IEEE Power and Energy Society General Meeting

117

100

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Abstract-This paper shortly surveys existing and proposed methods for voltage instability detection. The emphasis is on methods relying on real-time measurements as well as on longterm voltage instability. Methods are classified according to the required measurement configuration: local vs. wide-area, standard SCADA-type vs. synchronized phasor measurements, etc. In the various categories, some of the features are summarized, and what appears to the authors as advantages or limitations is shortly discussed. An important feature is the ability to anticipate instability. Some tracks for further work on the subject are also outlined.

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“…The thermal and hydroelectric power generators in a power system are the source of dynamic reserve reactive power, which has a rapid response characteristic essential for maintaining the system's voltage [16]. Therefore, it is important to keep some reserves to respond adequately to possible system disturbances [17].…”

Section: Introductionmentioning

confidence: 99%

An Approach to Improve the Penetration of Sustainable Energy Using Optimal Transformer Tap Control

Bae

Lee

2017

Sustainability

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A method to secure the generator reactive power reserve by adjusting the transformer tap to improve the power system penetration of renewable energy has been proposed in this study. The tap is adjusted based on the voltage and reactive power sensitivity in the power system network. That is, the transformer tap sensitivity is calculated and analyzed to adjust the tap variation to gain sufficient or the least necessary amount of reactive power reserve. This method can be effective for generators without any margins in the reserves. The optimization problem based on the calculated sensitivities and effectiveness are presented. The optimum solution derived from such a problem provides the minimum control amount necessary to maintain the system voltage and dynamic reactive power reserve at their pre-specified levels to improve the power system acceptability of renewable energy. To demonstrate the effectiveness of the method proposed, a simulation has been performed for an IEEE-25 bus system. The results from simulations prove that the voltage has been well maintained while securing a dynamic reactive power reserve through optimal control based on the sensitivity analysis.

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Investigation of various generator reactive power reserve (GRPR) definitions for online voltage stability/security assessment

Cited by 55 publications

References 7 publications

Preventive reactive power management for improving voltage stability margin

Preventive reactive power management for improving voltage stability margin

A short survey of methods for voltage instability detection

An Approach to Improve the Penetration of Sustainable Energy Using Optimal Transformer Tap Control

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