A new integer-value modeling of optimal load shedding to prevent voltage instability

Ahmadi, Ahmad; Alinejad‐Beromi, Yousef

doi:10.1016/j.ijepes.2014.09.021

Cited by 27 publications

(21 citation statements)

References 20 publications

(31 reference statements)

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“…The proposed approach was tested on two test system, a meshed network 66 kV, 45-bus Egyptian, and 33-radial bus system. 119 The proposed methodology was implemented on the IEEE 14 and 30 bus test systems. A hybrid technique in which firefly and PSO are combined to achieve minimum load shed and correct location for load shed was proposed and tested on IEEE 30-bus test system.…”

Section: Hybrid Optimization Approaches For Uvlsmentioning

confidence: 99%

A critical review of the state‐of‐art schemes for under voltage load shedding

Larik

Mustafa

Aman

2019

Int Trans Electr Energ Syst

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Summary A blackout is usually the result of increasing load beyond the transmission capacity of the power system. One of the main reasons for power blackouts is voltage collapse. To avoid this problem, the proper corrective measures called load shedding is required. In critical and extreme emergencies, under voltage load shedding (UVLS) is performed as a final remedy to avoid a larger scale voltage collapse. Therefore, UVLS is considered state of the art to achieve voltage stability. This review summarizes and updates the important aspects of UVLS; it also provides principle understanding of UVLS, which are critical in planning such defense schemes. Moreover, this article provides a discussion on recent state‐of‐art UVLS schemes applied in various power industries. Additionally, the pros and cons of the conventional and computational intelligence techniques are discussed. It is envisioned that this work will serve as one‐stop information for power system engineers, designers, and researches.

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Section: Hybrid Optimization Approaches For Uvlsmentioning

confidence: 99%

A critical review of the state‐of‐art schemes for under voltage load shedding

Larik

Mustafa

Aman

2019

Int Trans Electr Energ Syst

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“…However, the proposed technique works well on transmission networks only. To prevent voltage instability a new integer value model for optimal load shedding was achieved through hybrid discrete PSO by considering multiple objectives in [31]. However, the proposed method suffered from long convergence time due to too many objectives.…”

Section: Literature Reviewmentioning

confidence: 99%

An Improved Algorithm for Optimal Load Shedding in Power Systems

et al. 2018

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A blackout is usually the result of load increasing beyond the transmission capacity of the power system. A collapsing system enters a contingency state before the blackout. This contingency state is characterized by a decline in the bus voltage magnitudes. To avoid blackouts, power systems may start shedding load when a contingency state occurs called under voltage load shedding (UVLS). The success of a UVLS scheme in arresting the contingency state depends on shedding the optimum amount of load at the optimum time and location. This paper proposes a hybrid algorithm based on genetic algorithms (GA) and particle swarm optimization (PSO). The proposed algorithm can be used to find the optimal amount of load shed for systems under stress (overloaded) in smart grids. The proposed algorithm uses the fast voltage stability index (FVSI) to determine the weak buses in the system and then calculates the optimal amount of load shed to recover a collapsing system. The performance analysis shows that the proposed algorithm can improve the voltage profile by 0.022 per units with up to 75% less load shedding and a convergence time that is 53% faster than GA.

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“…In addition to objective in Equation (14) and constant power factor assumption in Equation (15), the power balance equations, given by Equations (6) and (7), and inequality constraints, given in Equation (16)(17)(18)(19)(20)(21)(22)(23), are considered for optimization.…”

Section: Problem Formulation For Load Curtailment Minimizationmentioning

confidence: 99%

“…[16] describes the developed mathematical model of intellectual under frequency load shedding system and its operational algorithms, e.g., integration of smart grid technology into emergency automation and investigation of the control process for such automation. [19] to restore the system stability and ensure the system's secure limits in an occurrence of a critical contingency. [17] is based on the application of fuzzy logic principles for peak load curtailment in a smart grid environment.…”

Section: Introductionmentioning

confidence: 99%

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Load curtailment minimization by optimal placement of Unified Power Flow Controller

Singh

Qazi

Ghandhari

2016

Int. Trans. Electr. Energ. Syst.

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Summary In this paper, a new sensitivity‐based approach is proposed to minimize the load curtailment by optimal placement of series controller of the Unified Power Flow Controller (UPFC) in the power system. The proposed sensitivity factors are derived in terms of change in load curtailment with respect to change in UPFC series control parameters. The effectiveness of the proposed method has been investigated by formulating an optimal power flow problem with an objective to minimize the load curtailment. Results have been obtained on IEEE 14‐bus and IEEE 30‐bus systems. It has been shown that required load curtailment drastically reduced with placement of UPFC and could be effective in various operating conditions of power system. With this technique, a large amount of power curtailment could be avoided, hence, saved from revenue loss, social disobedience, and customer service interruption. Copyright © 2016 John Wiley & Sons, Ltd.

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A new integer-value modeling of optimal load shedding to prevent voltage instability

Cited by 27 publications

References 20 publications

A critical review of the state‐of‐art schemes for under voltage load shedding

A critical review of the state‐of‐art schemes for under voltage load shedding

An Improved Algorithm for Optimal Load Shedding in Power Systems

Load curtailment minimization by optimal placement of Unified Power Flow Controller

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