A new OPF based distribution system restoration method

Borges, Thiago Trezza; Carneiro, S.; Garcia, P.A.N.; Pereira, J.L.R.

doi:10.1016/j.ijepes.2016.01.024

Cited by 10 publications

(11 citation statements)

References 27 publications

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“…y uncertain = y + ∆y (25) where Pg uncertain are the uncertainties regarding the active power produced by conventional generators, necessary for energy reserve analysis; V uncertain are the uncertainties regarding the nodal voltage magnitudes, necessary to analyze the accomplishment of the limits imposed by the regulatory authorities; t uncertain are the uncertainties regarding the active power flows through circuit breakers, necessary to verify the correct sizing of these devices by the rated current; and y uncertain are the uncertainties regarding the other electrical quantities that can be used according to necessity. In summary, the uncertainties of EPS electrical quantities are determined, in the second stage, by the sum of deterministic variables (determined in the first stage) and fuzzy variables.…”

Section: Electrical Quantity Uncertainties Of Eps: Second Stagementioning

confidence: 99%

“…These values are used in the second stage (Section 2.2-Equations (17)-(21)) of the proposal methodology, in order to determine the fuzzy variables of EPS electrical quantities. The uncertainties of EPS electrical quantities are then computed by the sum of deterministic variables, determined in the first stage, and fuzzy variables, determined in the second stage, as discussed in Section 2.2-Equations (22)(23)(24)(25).…”

Section: Test System Datamentioning

confidence: 99%

“…Another promising application of the OPF has been the inclusion of switch and circuit breaker representation, hereinafter referred to as switchable branches, in power grid modeling. Through continuous functions, this representation has been used successfully in assessments of system reconfiguration [24] and in restoring the maximum loads in distribution systems [25]. The representation of these devices by integer variables is proposed in [26] to obtain the optimum dispatch and topology of an electric network to meet static loads.…”

Section: Introductionmentioning

confidence: 99%

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An Expeditious Methodology to Assess the Effects of Intermittent Generation on Power Systems

et al. 2019

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This paper proposes an expeditious methodology that provides hourly assessments of the effect of intermittent wind and solar power generation on the electrical quantities characterizing power systems. Currents are measured via circuit breakers to confirm the correct sizing of devices based on their rated currents. Nodal voltage magnitudes are assessed for compliance with limits imposed by regulatory authorities, whereas the active power produced by hydroelectrical generators is assessed for reserve energy. The proposed methodology leverages a fuzzy extended deterministic optimal power flow that uses in power balance equations the average hourly values of active power generated by wind and solar sources as well as hourly energy load. The power grid is modeled at the substation level to directly obtain power flow through circuit breakers. Uncertainties in power system electrical quantities are assessed for an optimal solution using a Taylor series associated with deviations from the average values of the active power produced by the wind and solar sources. These deviations are represented using a fuzzy triangular model reflecting the approximations of the probability density functions of these powers. The methodology takes into account a subjective investigation that focuses on the qualitative characteristic of these energy sources’ behaviors.

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Section: Electrical Quantity Uncertainties Of Eps: Second Stagementioning

confidence: 99%

Section: Test System Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Expeditious Methodology to Assess the Effects of Intermittent Generation on Power Systems

et al. 2019

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“…This problem has also been approached using the meta-heuristic algorithms [16],fuzzy technology [17], multi-agent technologies [18] and other non-structured methods [2]. Authors in [20] proposed a new approach based on optimal power flow technique to minimize customer load shedding aiming to improve load pickup.A software tool to simulate the recovery process of smart grid after an accordance of black out is presented in [21]. In this paper the black-start capability considered as a constant power in the system.…”

Section: Introductionmentioning

confidence: 99%

Load restoration methodology considering renewable energies and combined heat and power systems

Alwan¹,

Farhan²

2018

IJET

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Outages and faults cause problems in interconnected power system with huge economic consequences in modern societies. In the power system blackouts, black start resources such as micro combined heat and power (CHP) systems and renewable energies, due to their selfstart ability, are one of the solutions to restore power system as quickly as possible. In this paper, we propose a model for power system restoration considering CHP systems and renewable energy sources as being available in blackout states. We define a control variable representing a level of balance between the distance and importance of loads according to the importance and urgency of the affected customer. Dynamic power flow is considered in order to find feasible sequence and combination of loads for load restoration.

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“…Também existem trabalhos baseados em métodos clássicos de otimização. Em [9] a restauração de sistemas de distribuição é tratada como um problema de Programação Não Linear Inteira Mista (PNLIM), onde as chaves normalmente abertas (NA) são fechadas de acordo com um índice de sensibilidade atribuído. Em [10] a restauração de redes de distribuição também é estruturada como um problema de PNLIM.…”

Section: Introductionunclassified

A Method of Restoring Distribution Systems Using Adjacent Networks and Two Levels Search

Costa

Araujo

2018

IEEE Latin Am. Trans.

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 This paper presents an adjacent feeders search based method for service restoration of distribution systems after single faults. The developed algorithm makes a search for sections that belong to adjacent feeders and comply with two conditions: have normally open equipment installed or have a three or more derivations. As soon as the sections are selected, an exhaustive search is executed to achieve the restoration plan. To demonstrate the effectiveness of the proposed method, service restoration on a typical distribution system of Taiwan Power Company is applied. The results are compared with others approaches and show that the proposed method can provide a restoration plan very efficiently even under different load levels.

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A new OPF based distribution system restoration method

Cited by 10 publications

References 27 publications

An Expeditious Methodology to Assess the Effects of Intermittent Generation on Power Systems

An Expeditious Methodology to Assess the Effects of Intermittent Generation on Power Systems

Load restoration methodology considering renewable energies and combined heat and power systems

A Method of Restoring Distribution Systems Using Adjacent Networks and Two Levels Search

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