Towards smart power distribution systems
Iyer, Praveen Raghunathan
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Smart Distribution Systems, a significant part of Smart Grid has been developing rapidly. The need for such a system arises with changes in conventional grid such as ever-increasing integration of Renewable Sources into the Grid, increasing Energy Storage Systems and Distributed Energy Resources (DER). The conventional Grid needs to be made more Flexible, Reliable and Intelligent Energy Delivery System (FRIENDS) in order to cope up with the future challenges. One of the important concepts in Smart Distribution Grid is Centralized Protection System (CPS). The protection system in an electric substation consists of various protective relays in addition to Supervisory Control and Data Acquisition (SCADA) System, Satellite Time Clock and Data Loggers that control and monitor by collection of substation data such as currents, voltages and the status of switches. The following text provides a novel idea of integrating electric substation components into a single computer capable of running all necessary operations. A research paper, demonstrating this idea titled, 'Computer-based Centralized Protection System for Electric Substations' is currently in the process for submission to ELSEIVER journal for publication. The other important concept is protection of Distribution Network with 'Renewable Sources', which causes the load flow to change and also gets affected by solar radiation. In the following pages, a novel idea for MV distribution network protection in the presence of Photovoltaic (PV) sources is presented by combining directional OC and under-voltage (UV) protection. A research paper, including the simulation of above idea titled, 'A New Protection scheme for Medium Voltage Distribution Network with PV Sources' based on the above work has been accepted for publication in the Special Issue IEEE Transactions on Power Delivery on "Protection and Real-Time Monitoring of Transmission and Distribution Systems with High Penetration of Distributed Generation and Microgrids".