Optimal Restoration of Distribution Systems Using Dynamic Programming

Resource management is a crucial task during natural or man-made disasters to maximize the number of saved lives. As part of the vital resources, electricity restoration has a high priority for increasing the performance of critical infrastructures such as hospitals and water pumping stations. Also, the interdependencies between these infrastructures have to be taken into account in the process of service restoration to ensure their maximum operational capacity. In this paper, the problem of service restoration in a distribution system to maximize the operational capacity of a hospital is formulated. Different case studies are considered to show the effectiveness of the proposed method under a variety of emergency situations.

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“…[8]. The restoration problem considered in this paper is, however, different from those studies in several aspects.…”

Section: Introductionmentioning

confidence: 89%

Distribution system restoration considering critical infrastructures interdependencies

Ahmadi

Alsubaie²,

Martí

2014

2014 IEEE PES General Meeting | Conference &Amp; Exposition

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“…In addition, the load restoration in distribution network has been well addressed [10,11]. The objective of this paper is thus to propose a model and the associated solution method to maximize the interrupted load pickup for the transmission network, which is the main target of the GRM5 (i.e., serve loads in the area).…”

Section: Introductionmentioning

confidence: 99%

A branch-and-cut method for computing load restoration plan considering transmission network and discrete load increment

Qin

Hou

Liu

et al. 2014

2014 Power Systems Computation Conference

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This paper proposes an optimization model to compute optimal load restoration plan for the transmission network. The objective of this model is to maximize the load pickup subject to power flow constraints and discrete load increment constraints. This mix-integer optimal power flow model (MIOPF) is solved via a branch-and-cut (B&C) framework. The nodes in the B&C tree are solved by the interior point method. In particular, three cutting planes, namely, the Gomory rounding cut, the knapsack cover cut, and the fixing variable cut, are incorporated into each node of the B&C tree to reduce the scale of the sub-tree. This model can be used to aid the system operators to conduct load restoration actions or draw up a restoration plan. The load restoration plan is obtained by solving a number of co-related MIOPF models till all load increments are restored. The RTS 24-bus test case with 170 load increments (i.e., with 170 binary variables) is used to illustrate complexity of the proposed model and the computational efficiency improvement stemming from the cutting planes.

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“…Distribution automation provides more efficient day-to-day operation and improves restoration process (i.e. rapid response to outages, reduce operator errors and reduce duration of outage) [1,2]. Service restoration is one of the distribution automation (DA) functions which represent the cornerstone for smart grid development strategy [3].…”

Section: Introductionmentioning

confidence: 99%

“…Some of the restoration methods without DG are: Ref. [1] presented a method for solving the service restoration problem for radial distribution systems using dynamic programming with state reduction. The limit of dynamic programming is it becomes computationally intensive for high number of decision variables (i.e.…”

Section: Introductionmentioning

confidence: 99%

Service restoration in balanced and unbalanced distribution systems with high DG penetration

Zidan

El-Saadany

2011

2011 IEEE Power and Energy Society General Meeting

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This paper presents a simple yet efficient service restoration algorithm for balanced and unbalanced radial distribution networks including Distributed Generators DG. The proposed algorithm that is based on load flow, begins with identifying the de-energized loads group due to fault isolation. All tie switches connecting this group with the rest of the network are the candidate switches for restoration. Branch currents from meshed network (i.e. closing all tie switches) were used as switching index to determine which one of these candidate tie switches should be closed for restoration. The restoration is carried out with objectives of maximizing the restored loads and minimizing the number of switching operations under line current limits, bus voltage limits and radial topology constraints. Each out-of-service group restored by closing the candidate tie switch with highest switching index. The proposed method has been tested on one balanced and two unbalanced systems with and without distributed generation, and compared with those reported in the literature.

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Optimal Restoration of Distribution Systems Using Dynamic Programming

Cited by 137 publications

References 28 publications

Distribution system restoration considering critical infrastructures interdependencies

Distribution system restoration considering critical infrastructures interdependencies

A branch-and-cut method for computing load restoration plan considering transmission network and discrete load increment

Service restoration in balanced and unbalanced distribution systems with high DG penetration

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