An Application of advanced Dijkstra algorithm and Fuzzy rule to search a restoration topology in Distribution Systems 배전계통 사고복구 구성탐색을 위한 개선된 다익스트라 알고리즘과 퍼지규칙의 적용원문보기
The Distribution System consist of many tie-line switches and sectionalizing switches, operated a radial type. When an outage occurs in Distribution System, outage areas are isolated by system switches, has to restored as soon as possible. At this time, system operator have to get a information abou...
The Distribution System consist of many tie-line switches and sectionalizing switches, operated a radial type. When an outage occurs in Distribution System, outage areas are isolated by system switches, has to restored as soon as possible. At this time, system operator have to get a information about network topology for service restoration of outage areas. Therefore, the searching result of restorative topology has to fast computation time and reliable result topology for to restore a electric service to outage areas, equal to optimal switching operation problem. So, the problem can be defined as combinatorial optimization problem. The service restoration problem is so important problem which have outage area minimization, outage loss minimization. Many researcher is applying to the service restoration problem with various techniques. In this paper, advanced Dijkstra algorithm is applied to searching a restoration topology, is so efficient to searching a shortest path in graph type network. Additionally, fuzzy rules and operator are applied to overcome a fuzziness of correlation with input data. The present technique has superior results which are fast computation time and searching results than previous researches, demonstrated by example distribution model system which has 3 feeders, 26 buses. For a application capability to real distribution system, additionally demonstrated by real distribution system of KEPCO(Korea Electric Power Corporation) which has 8 feeders and 140 buses.
The Distribution System consist of many tie-line switches and sectionalizing switches, operated a radial type. When an outage occurs in Distribution System, outage areas are isolated by system switches, has to restored as soon as possible. At this time, system operator have to get a information about network topology for service restoration of outage areas. Therefore, the searching result of restorative topology has to fast computation time and reliable result topology for to restore a electric service to outage areas, equal to optimal switching operation problem. So, the problem can be defined as combinatorial optimization problem. The service restoration problem is so important problem which have outage area minimization, outage loss minimization. Many researcher is applying to the service restoration problem with various techniques. In this paper, advanced Dijkstra algorithm is applied to searching a restoration topology, is so efficient to searching a shortest path in graph type network. Additionally, fuzzy rules and operator are applied to overcome a fuzziness of correlation with input data. The present technique has superior results which are fast computation time and searching results than previous researches, demonstrated by example distribution model system which has 3 feeders, 26 buses. For a application capability to real distribution system, additionally demonstrated by real distribution system of KEPCO(Korea Electric Power Corporation) which has 8 feeders and 140 buses.
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가설 설정
3) We adopt a fuzzy rule to restore priority restoration area when distribution system is not restored perfectly. So that, there is increased a restorative possibility of priority restoration-area, can stand a restorative scheme with distinction.
제안 방법
Additionally, re지 distribution system model simulated for effectiveness and applicable capability of proposed method. The distribution system model is a real operation system of kyong-gi district office of KEPCO.
Table 1. In this paper, the proposed method is handling only topological reconfiguration problem but also priority restorative case for outage restoration in distribution system. Consequently, result of the proposed method is so practical results.
In this paper, we applied the advanced Dijkstra method and Fuzzy Rule to search a restoration topology in distribution systems. So, We adopt a fuzzy rule to restore priority restoration area when distribution system is not restored perfectly.
The proposed method can apply to automation system restorative part for to present of restorative optimal topology in Distribution Automation System after distribution automation completed.
The proposed method has been applied to simple and real distribution system models using the advanced Dijkstra method and fuzzy rule for effectiveness and applicable capability. The simple distribution system model was used by reference [8-9].
3. The proposed method simulated some 망eneral cases, which are primary and secondary adjacent outage, and priority restorative case. By the result of simulation, all cases of secondary adjacent outage is restored in this simulation, but the cases of primary adjacent outage is not restored all cases for reasons of capacity constraints and limit of load transfer.
대상 데이터
The distribution system model is a real operation system of kyong-gi district office of KEPCO. The real distribution system model consist of 8 feeders, 140 buses. Loading ratio of simple model system is set 80% of full loading for various simulation result in this simulation.
이론/모형
In this paper, advanced technique for service restoration is presented by advanced Dijkatra and fuzzy rule. Main topic of this paper is the follows.
성능/효과
5) Numerical simulation is performed a simple distribution system model, have 3 feeders and 26 buses, and modified real distribution system model of kyong-gi distinct of KEPCO's, have 8 feeders and 140 buses.
후속연구
problem. Future work should be directed to extending the method to handle sub-station out^e problems.
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