Security-Constrained Unit Commitment With AC/DC Transmission Systems

Lotfjou, A.; Shahidehpour, Mohammad; Yong, Fu; Li, Zuyi

doi:10.1109/tpwrs.2009.2036486

Cited by 86 publications

(39 citation statements)

References 19 publications

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“…In particular, various researchers introduced mixed-integer programming and decomposition-based methods for more efficiently enforcing N-1 reliability, e.g., see [10,11,28,17,12,19]. However, due to its computational complexity, security-constrained unit commitment considering the full spectrum of NERC reliability standards has not attracted a comparable level of attention until very recently.…”

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confidence: 99%

Contingency-constrained unit commitment with post-contingency corrective recourse

et al. 2014

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We consider the problem of minimizing costs in the generation unit commitment problem, a cornerstone in electric power system operations, while enforcing an N-k-ε reliability criterion. This reliability criterion is a generalization of the wellknown N-k criterion, and dictates that at least (1 − ε j ) fraction of the total system demand must be met following the failures of k or fewer system components. We refer to this problem as the Contingency-Constrained Unit Commitment problem, or CCUC. We present a mixed-integer programming formulation of the CCUC that accounts for both transmission and generation element failures. We propose novel cutting plane algorithms that avoid the need to explicitly consider an exponential number of contingencies. Computational studies are performed on several IEEE test systems and a simplified model of the Western US interconnection network, which demonstrate the effectiveness of our proposed methods relative to current state-of-the-art.

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confidence: 99%

Contingency-constrained unit commitment with post-contingency corrective recourse

et al. 2014

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“…The stochastic model introduced in [18] is designed to ensure the ISO that the system will have secure operation during the scheduling horizon. The same methodology has been implemented in [19] with detailed representation of high voltage DC transmission system. The aim of [20] is to prove that applying a quantified method while dealing with intermittent resources increases the reliability [21] for modeling the uncertainty of the ST intermittent resources generation prediction.…”

Section: Literature Review and Contributionmentioning

confidence: 99%

“…(18) and (19) that are used to generate duration sampling, r 1 and r 2 are the uniformly distributed random numbers in the interval [0, 1]…”

Section: Scenario Generationmentioning

confidence: 99%

“…The annual peak load of the system is 5500 MW [19], and GENCO 4 considers a finite and discrete set of possible scenarios for the demand in the following week. It is assumed that the weekly peak load in percent of the annual peak is 88.7 for scenarios 1-4, 90 for scenarios 5-8 and 86.1 for scenarios 9-12 with respectively 0.4, 0.3 and 0.3 as their associated probability of occurrence.…”

Section: Casementioning

confidence: 99%

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Stochastic short-term maintenance scheduling of GENCOs in an oligopolistic electricity market

et al. 2013

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a b s t r a c tIn the proposed model, the independent system operator (ISO) provides the opportunity for maintenance outage rescheduling of generating units before each short-term (ST) time interval. Long-term (LT) scheduling for 1 or 2 years in advance is essential for the ISO and the generation companies (GENCOs) to decide their LT strategies; however, it is not possible to be exactly followed and requires slight adjustments. The Cournot-Nash equilibrium is used to characterize the decision-making procedure of an individual GENCO for ST intervals considering the effective coordination with LT plans. Random inputs, such as parameters of the demand function of loads, hourly demand during the following ST time interval and the expected generation pattern of the rivals, are included as scenarios in the stochastic mixed integer program defined to model the payoff-maximizing objective of a GENCO. Scenario reduction algorithms are used to deal with the computational burden. Two reliability test systems were chosen to illustrate the effectiveness of the proposed model for the ST decision-making process for future planned outages from the point of view of a GENCO.

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“…The results demonstrate that the DC power flow model is not reliable for obtaining optimal line switching results, while the heuristic algorithms can be valuable for finding AC feasible solutions, and the relaxation method is instrumental in guaranteeing the optimization objective. Benders decomposition approach divides the original problem into a master and a slave problem to reduce the constraints of the original problem [21][22][23]. In [3], a Benders decomposition algorithm is also used to solve the TS problem and the slave problem is used to check AC feasibility and N-1 security criteria.…”

Section: Introductionmentioning

confidence: 99%

Optimal transmission switching to eliminate voltage violations during light-load periods using decomposition approach

Zhao

Zhou

et al. 2018

J. Mod. Power Syst. Clean Energy

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With the rapid load increase in some countries such as China, power grids are becoming more strongly interconnected, and the differences between peak and valley loads are also increasing. As a result, some bulk power systems are facing high voltage limit violations during light-load periods. This paper proposes to utilize transmission switching (TS) to eliminate voltage violations. The TS problem is formed as a mixed-integer nonlinear program (MINLP) with AC power flow constraints and binary variables. The proposed MINLP problem is non-deterministic polynomial hard. To efficiently solve the problem, a decomposition approach is developed. This approach decomposes the original problem into a mixedinteger linear programming master problem and an AC optimal power flow slave problem that is used to check the AC feasibility. Prevention of islanding is also taken into consideration to ensure the feasibility of the TS results. The modified IEEE 39-bus and IEEE 57-bus test systems are used to demonstrate the applicability and effectiveness of the proposed method.

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Security-Constrained Unit Commitment With AC/DC Transmission Systems

Cited by 86 publications

References 19 publications

Contingency-constrained unit commitment with post-contingency corrective recourse

Contingency-constrained unit commitment with post-contingency corrective recourse

Stochastic short-term maintenance scheduling of GENCOs in an oligopolistic electricity market

Optimal transmission switching to eliminate voltage violations during light-load periods using decomposition approach

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