University of Khartoum

Design of A Bay Control Unit in A Substation Automation System

Design of A Bay Control Unit in A Substation Automation System

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Title: Design of A Bay Control Unit in A Substation Automation System
Author: El-Amien, Azza Siraj El-Dien M
Abstract: A bay of is a part of a substation containing extra-high (or high) voltage switching devices and connections of a power line, a power transformer, etc., to the substation busbar .It forms a vital node in power networks ,for that a responsive automation system is needed for controlling , protection and monitoring of substations. Interlocking is a method of preventing undesired states in a substation, that is achieved by a series of conditions must be met to affect an output condition ,An improper switching operation can damage equipment and can affect the quality of the electrical system. Traditionally, Bay Control Units (BCUs) and Remote Terminal Units (RTUs) were used in substations to act as the link between the switchgear (devices) and the control centre for monitoring and controlling ,now that more and more they are being replaced by another electrical devices,more efficient in measurements and protection, like Programmable Logic Controllers(PLC). The project concerned the software interlocking system applied for mutual interlocking disconnectors, circuit breakers and earthing switches at a bay to avoid consequences, that is to ensure safety of switching operations carried out in the substation during operation and maintenance, using a control solution with PLC for a model that simulates a bay of substation. The project also allows operators to interface with the control system in an evident way , using PC-Access human machine interface(HMI). PLC interlocking is used all over the world and is very reliable, and from safety point of view, some PLCs are now safety rated, with these, PLC can be used for safety interlocking and controlling.
URI: http://khartoumspace.uofk.edu/handle/123456789/18586
Date: 2009


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