Load redisposition for security improvement in primary substations

Pao Yue-kong Library Electronic Theses Database

Load redisposition for security improvement in primary substations


Author: Chan, Yun-chuen
Title: Load redisposition for security improvement in primary substations
Degree: M.Sc.
Year: 1997
Subject: Electric power systems -- Security measures
Electric power systems -- Data processing
Electric power distribution -- Data processing
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Pages: iv, 60 leaves : ill. ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1437014
URI: http://theses.lib.polyu.edu.hk/handle/200/4589
Abstract: In case of a supplying transformer outage due to fault or planned maintenance, a contingency plan should be prepared to maintain services to customers and system security to an acceptable level. In a practical contingency plan, network reconfiguration seem to be un-avoidable. A general network reconfiguration problem is essentially combinatorial; suitable to be approached by heuristic search methods. In this dissertation, a systematic heuristic search method is employed to identify feasible switching options and network topology under the constraint of power system. Feeder overload, transformer overload and service restoration are all considered. The number of switching operations for resolution of these problems is an important factor for practical use. Hence, the number of switching operations is also considered. In this dissertation, a C++ program is developed to provide a quick and best strategy of network reconfiguration for System Control Engineers. The network reconfiguration problem is constrained by the capacity of a transformer, the firm capacity of a ring and the availability and capacity of interconnected circuit. Based on the proposed method, a practical, efficient and reliable solution with relatively few switching operations is obtained. In addition, a practical distribution system in Hong Kong is used to test the results.

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