A practical minimum load shedding strategy to mitigate voltage collapse

Feng, Zhihong; Ajjarapu, Venkataramana; Maratukulam, D.

doi:10.1109/59.736266

Cited by 80 publications

(41 citation statements)

References 15 publications

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“…The idea of control based on the sensitivities of mismatch with respect to vector control u [5,7] can be combined with the proposed method to find a better control strategy.…”

Section: Resultsmentioning

confidence: 99%

“…Howbeit, it consumed time and required a great computational effort due to its complexity and difficulty of dividing the networks. In 1998, Feng et al described a method for determining the minimum load shedding required to find the equilibrium point associated with the post-contingency boundary [7]. Feng's method could minimize the control actions and identify the most effective control strategy but this also consumes time and the loads must be curtailed.…”

Section: Introductionmentioning

confidence: 99%

“…However, for the last case, the only way to restore solvability would be structure modifications. A significant number of researchers have proposed various methods to deal with this problem [4][5][6][7][8][9][10]. These works, in fact, have their own advantages, limitations and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Approach for Corrective and Preventive Control to Unsolvable Case in Power Networks having DERs

Dinh¹,

Nguyen²,

Yoon³

2013

Journal of Electrical Engineering and Technology

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-Recently, Korean system operating conditions have gradually approached an upper limit.When a contingency occurs, the power system may have no solutions. Different from the cases of bad initial guesses or the solutions are too close to the solvability boundary in which numerical methods can be applied, for unsolvable cases, the only way to restore solvability would be structure modifications. In this paper, a new approach for corrective and preventive control to such cases is proposed in two steps: (i) finding any solution regardless its feasibility; (ii) for the infeasible solution, make it feasible with additional modifications at load buses having Distributed Energy Resources. The test case built based on the peak load profile of 2008 by KEPCO including 1336 buses is analyzed. Since reactive power compensation is optimized to restore solvability, all demands are met, therefore no blackouts happen. The proposed method was integrated in the LP program designed by power21 Corporation.

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“…The idea of control based on the sensitivities of mismatch with respect to vector control u [5,7] can be combined with the proposed method to find a better control strategy.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A New Approach for Corrective and Preventive Control to Unsolvable Case in Power Networks having DERs

Dinh¹,

Nguyen²,

Yoon³

2013

Journal of Electrical Engineering and Technology

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show abstract

“…Load shedding, considered as corrective action, is verified in various literatures [134][135][136][137][138]. Other various mathematical modelling and optimisation techniques include: PSO [139], decision trees [140][141][142][143][144][145], model predictive control [146], ant colony system [147][148][149], GA and ANN [150], differential evolution [151,152], and various other optimisation techniques [153,154].…”

Section: System Operationmentioning

confidence: 99%

Time‐horizons in the planning and operation of transmission networks: an overview

Khuntia

Tuinema

Rueda

et al. 2016

IET Generation, Transmission & Distribution

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In the planning and operation of power systems, actions are taken in different processes and time-horizons. The purpose of these actions is to secure a high reliability level. Although the three main processes (grid development, asset management, and system operation) are described in literature, there has been no explicit study on the time-horizons (long-term, mid-term, and short-term) and actual time-scale (decades, years, months, etc.) that these processes focus on. This study aims at making a review of the various activities performed by transmission system operators while reviewing the concept of each time-horizon and methodologies developed in literature. As decisions taken in different time-horizons can influence each other, the interactions and overlapping are discussed.

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“…Load shedding is an effective countermeasure against voltage instability and collapse, as documented for instance in Taylor (1994Taylor ( , 1992; Van Cutsem and Vournas (1998) ;Feng et al (1998); Nikolaidis and Vournas (2008). It should be used in the last resort, when other available corrective controls have been exhausted.…”

Section: Introductionmentioning

confidence: 99%

Wide-Area Adaptive Load Shedding Control to Counteract Voltage Instability

Otomega

Glavić

Cutsem

2012

IFAC Proceedings Volumes

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Abstract:A two-level adaptive load shedding scheme against voltage instability is proposed, adjusting its actions to the severity of the situation. The lower level includes a set of distributed controllers which curtail loads once the voltages at monitored transmission buses fall and stay for some time below threshold values. The adaptive nature of the proposed scheme comes from the upper level adjusting those thresholds in real-time. At the time instant the upper level detects that the system enters an emergency condition, it sends a signal to the lower-level controllers requesting them to take their currently measured voltages as threshold values. The upper-level emergency detection can be based on various criteria, the key-point being that it takes advantage of a wide-area monitoring of the system. In particular, the paper illustrates the use of a voltage instability detection scheme based on sensitivity computation. In case the upper level fails sending its signal, the lower-level controllers act in purely distributed mode, each using its pre-set threshold voltage. The capabilities of the proposed scheme are illustrated on a small but realistic test system.

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A practical minimum load shedding strategy to mitigate voltage collapse

Cited by 80 publications

References 15 publications

A New Approach for Corrective and Preventive Control to Unsolvable Case in Power Networks having DERs

A New Approach for Corrective and Preventive Control to Unsolvable Case in Power Networks having DERs

Time‐horizons in the planning and operation of transmission networks: an overview

Wide-Area Adaptive Load Shedding Control to Counteract Voltage Instability

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