Computer-based strategy for the restoration problem in electric power distribution systems

Curcic, Srdjan; Ozveren, C.S.; Lo, K.L.

doi:10.1049/ip-gtd:19971355

Cited by 32 publications

(12 citation statements)

References 3 publications

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“…2 in brackets of <A>. Tripping each of the eight switches and executing D-to-C conversion, respectively, we obtain the set S (1) of load shading parameters for each switch as: Eliminating the elements with shaded load larger than 123 in S (2) and S (1) , the rest of the elements are (2) Executing one-step-shifting procedure on the 1st connected domain, we find that in case vertex 9 works as the loop switch, the loads of power source 23 and 29 are 267 A and 392 A, respectively. The minimum load shading scheme is to trip switch vertex 3 and 27 with the minimum shaded load of 103 A, which is superior to that based on the load balancing operation mode.…”

Section: Fig 1 a Typical Grid Distribution Networkmentioning

confidence: 99%

“…Many papers have been published on fault isolation and restoration based on distribution automation system (DAS), most of which are for small interruptions such as fault on a certain feeder section [1][2][3][4][5][6][7]. The technique to safely transfer as many loads as possible to healthy power sources in case of serious faults such as outages of a substation or a medium voltage bus was not mentioned.…”

Section: Introductionmentioning

confidence: 99%

“…Save it into queue Q, i.e.Feeder with source node 23 and its recodingEliminating the elements with shaded load larger than 121 in S(1) , the rest of the ) . Combining such three elements in pairs and eliminating DTO, we have the set of S(2) , i.The minimum load shading scheme to ensure the normalized load of the power source to be less than the 1shaded scheme with two switches needed to trip. Save it into queue Q, i.e.…”

mentioning

confidence: 99%

“…Combining the elements in S(2) and S(1) in pairs and eliminating DTO, we have the set of S (3) =Ø.Since set S (3) is empty, go to Step 6. .e., the minimum load shading operation is to trip switch vertex 9 with the minimum shaded load of 121 A, i.e., ∆L ref = 121 A.…”

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confidence: 99%

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Fast restoration of large area breakdown for power distribution systems

Liu

Cheng

2006

Front. Electr. Electron. Eng. China

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An adjacent table-based simplified model of distribution networks containing medium voltage buses of a substation is established. Identification of bus outage and the condition to start fast restoration procedure are discussed. A complex load shading parameter is set up to describe various load shading schemes. The imaginary part of the load shading parameter describes the states of switches of load shading schemes while the real part is the corresponding amount of shaded load. A new concept of independent tripping operation is also put forward. The procedure to search the operation with the least amount of shaded load for a feeder and a connected domain are detailed. The procedure for fast restoration of a large area breakdown of the whole distribution network under emergency states is dealt with using a typical grid distribution network as an example. Results of analysis show that the direct load shading scheme under the most balanced topology is not always the optimal scheme. The proposed method can obtain the optimal operating mode with the least amount of shaded load thus showing its feasibility.

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Section: Fig 1 a Typical Grid Distribution Networkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Fast restoration of large area breakdown for power distribution systems

Liu

Cheng

2006

Front. Electr. Electron. Eng. China

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“…The centralized approach without redundancy may lead to single point failure and closely depend on network topology; the network flow method for the restoration of the system is often used, but it ignores the priority of the load (Karen et al, 2001). Moreover, these techniques may add some constraints, such as a greater reliance on network topology and the overall information (Curcic et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Multi-agent system optimized reconfiguration of shipboard power system

Lan

Xiao

Zhang

2010

J. Marine. Sci. Appl.

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Reconfigurability of the electrical network in a shipboard power system (SPS) after its failure is central to the restoration of power supply and improves survivability of an SPS. The navigational process creates a sequence of different operating conditions. The priority of some loads differs in changing operating conditions. After analyzing characteristics of typical SPS, a model was developed used a grade switchboard Ⅲand an environmental prioritizing agent (EPA) algorithm. This algorithm was chosen as it is logically and physically decentralized as well as multi-agent oriented. The EPA algorithm was used to decide on the dynamic load priority, then it selected the means to best meet the maximum power supply load. The simulation results showed that higher priority loads were the first to be restored. The system satisfied all necessary constraints, demonstrating the effectiveness and validity of the proposed method.

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