Autonomous fault isolation and power restoration system for MV/LV distribution

Abstract

The term “Distribution Automation” generally refers to a distribution network switching subsystem devices equipped with the advanced technologies dedicated for purposes such as, ease of real time monitoring and controlling, reliability improvement management, integrating of distribution network and electricity market operation. Improving the reliability of electric power delivered to the end users is one of the main targets of employing distribution automation. Therefore, developing autonomous fault isolation and power restoration system for LV/MV distribution can be attractive reliability enhancement solution for the electric utilities. Electrical utility industries are not focusing on automating Low Voltage (LV) distribution system due to complexity of the LV distribution network feeders. However, there is a room available for automation if an algorithm could be developed for autonomous fault isolation and power restoration. Development of a comprehensive algorithm opens up a new pathway for LV distribution. Electrical distribution system network consists in large numbers of Remote Switching Subsystem Devices (RSSD) and these devices communicate in different protocol. These devices can be monitored and controlled remotely by linking with Supervisory Control and Data Acquisition (SCADA) system. However, investing on a fully fledge SCADA is not so economical for a small scale distribution utility. As a solution; scalable distribution automation will enable small scale distribution utilities to enter into distribution automation with optimal capital investment. Hence, developing a scalable SCADA is the solution for smaller distribution automation. Results of this thesis are, a proto type LV distribution system has been developed to demonstrate the algorithm for autonomous fault isolation and power restoration system. Also has been implemented open platform SCADA system in view of acquiring multi-protocol remote switching subsystem devices.