SCADA-Based Control System for Distribution Substation

SCADA (Supervisory Control and Data Acquisition) distribution is an integrated system which accepts for the digital automation of distribution substation, feeder and user functions. It includes control, monitoring and protection of the distribution system, load management and remote metering of consumer load. The main function of distribution system is to receive electric power from large, bulk power sources and to distribute electric power to consumer at various levels with acceptable degrees of reliability. This distribution system is analyzed to develop a secure, reliable and convenient management tool which can use remote terminal units (RTUs). This research work aims to apply SCADA-based control technique for distribution substation. In order to accomplish that purpose, necessary graphic designs are created and input/output devices of PLC are assigned to communicate Citect HML and PLCs. Afterwards, PLCs ladder diagram is developed for network of distribution substation. In addition, Ethernet System is established using SCADA design in which four clients and one supervisory computer are involved for control purpose. Each of four process control station connects with PLC by means of RS 232 system. However, this thesis mainly focuses on distribution substation process control system using SCADA. In that case, graphic design for distribution substation is created using graphic builder and dynamic pictures are controlled by each tag using the Citect (HML) programming including tags function. Various performance tests have been carried out in order to demonstrate the desirable features of SCADA application. The significant advantages of SCADA design implemented in this thesis are to provide safe energy efficiency and minimize damage possibilities. This tag development system is able to fulfil all tasks of power load management, and can be upgraded easily, and satisfy the continuously developing requirements. By using this system, the continuously developing requirements would be satisfied