Journal ArticleDOI
A Petri-net algorithm for multiple contingencies of distribution system operation
TLDR
In this article, a Petri net (PN) algorithm combined with a new power system restoration approach is implemented for multiple distribution contingencies, which is performed by releasing some loads required to maintain the rest of the system in safe operation in overload cases and opening all of the switches in the out-of-service areas for fault cases, and then closing proper switches to restore the isolated areas.Abstract:
In this paper, a Petri net (PN) algorithm combined with a new power system restoration approach is implemented for multiple distribution contingencies. This approach is performed by releasing some loads required to maintain the rest of the system in safe operation in overload cases and opening all of the switches in the out-of-service areas for fault cases, and then closing proper switches to restore the isolated areas. PN switching models and the construction of PNs for multiple contingency operation are proposed to implement the restoration algorithm. Problem solving is efficiently performed by parallel-like reasoning in the PN for all the multiple events simultaneously. Heuristic rules and evaluation functions are presented for the best first search in the PN. Multiple contingencies studied in this paper include problems of feeder fault/overload/over-unbalance and main transformer fault/overload. A practical Taiwan power (Taipower) distribution system is simulated to demonstrate the effectiveness of the proposed method. It is concluded that multiple contingencies of distribution systems can be solved by the proposed method effectively.read more
Citations
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Journal ArticleDOI
A rule-based expert system with colored Petri net models for distribution system service restoration
TL;DR: In this paper, a rule-based expert system with a colored Petri net (CPN) inference model is developed for service restoration of distribution systems, and the CPN models of distribution components such as four-way line switches are proposed to derive the proper restoration plan after the faulted location has been identified and isolated.
Journal ArticleDOI
Development of an Object-Oriented Service Restoration Expert System With Load Variations
TL;DR: An expert system is developed by utilizing its fast reasoning mechanism and object-oriented features to develop a service restoration procedure that takes load variation into consideration.
Patent
Load restoration for feeder automation in electric power distribution systems
TL;DR: In this article, the authors propose a method and system to restore power in a power distribution network, where a base network state is defined and a power restoration logic is created for the base state.
Journal ArticleDOI
A Systematic Stochastic Petri Net Based Methodology for Transformer Fault Diagnosis and Repair Actions
TL;DR: The proposed Stochastic Petri Net based methodology provides a systematical determination of the sequence of fault diagnosis and repair actions and aims at identifying the transformer fault and estimating the duration for transformer repair.
Journal ArticleDOI
Distribution feeder reconfiguration for load balancing and service restoration by using G-nets inference mechanism
TL;DR: In this article, the G-Nets inference mechanism with operation rules is applied to derive the optimal switching operation decision for service restoration to perform the optimal load transfer among distribution feeders after the fault has been identified and isolated.
References
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Journal ArticleDOI
Network reconfiguration in distribution systems for loss reduction and load balancing
Mesut E. Baran,Felix F. Wu +1 more
TL;DR: Accuracy analysis and the test results show that estimation methods can be used in searches to reconfigure a given system even if the system is not well compensated and reconfiguring involves load transfer between different substations.
Journal ArticleDOI
Implementation of heuristic search strategies for distribution feeder reconfiguration
T. Taylor,David Lubkeman +1 more
TL;DR: In this paper, a best-first tree search strategy based on heuristics is used to evaluate the various switching operations available and a rule-based system aimed at the reduction of the search space is presented as a means of implementing the above strategy.
Journal ArticleDOI
Service restoration in distribution networks via network reconfiguration
TL;DR: In this paper, a heuristic methodology to restore service to the isolated portions of a distribution system via network reconfiguration is presented, which determines a minimum possible number of switching operations needed to restore services to network branches that are isolated due to forced or scheduled outages.
Journal ArticleDOI
Loss minimization of distribution feeders: optimality and algorithms
TL;DR: Two algorithms are presented: one is based on the uniformly distributed load model and the other on the concentrated current (or power) demand model, based on a concept of 'basic' current profiles of feeder sections and a transformation of the optimization problem.
Journal ArticleDOI
An efficient algorithm for load balancing of transformers and feeders by switch operation in large scale distribution systems
TL;DR: In this article, a load balancing of transformers and feeders by automatic sectionalizing of switch operation in large-scale distribution systems of the radial type is discussed, which is applicable to operations not only in the normal state, but also in scheduled and failure outage states.
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