Design and implementation of reliability evaluation module for medium voltage distribution networks by objectarx technology

In this paper a general reliability evaluation algorithm for complex medium voltage distribution networks (MVDN) is proposed, in which each feeder is a basic unit and without simplifying the network equivalent, the depth-first search algorithm and breadth-first search algorithm is used to search each feeder in topologies. Then circuit breakers oriented first-class zone based on the same influences by the failure and switches oriented second-class zone which is also the minimum zone based on causing the same failure impact are formed. System's normally power supply area, system's operational recovery of power supply area and system's unoperational recovery of power supply area can be formed by each zone at one time. Based on the AutoCAD visualization platform, and using Visual Studio.NET, ObjectARX secondary development technique and large-scale database, the author has completed the design and implementation of reliability evaluation module under the graphical interface applications. The module has been tested on the practical MVDNs, which verifies the effectiveness and the practicability of the proposed methods and applications in practical engineering. (6 pages)