Modernization and Digitization in Power Grid Sub-Stations– The Prime tool for Multi Objective Optimization Methods.

Prashanta Kumar Pattanaik

Abstract

All Grid Sub-stations has four sections to control, operate and protect the large gamut electrical Power for its smooth flow till to the end customer.1. Generation, Loading, Conversion and Carrier Devices: We have generators as generation device, Motors and other electrical equipment as Loading device, Transformers as conversion device and Electrical Conductors as Carrier device. On technology front in this section, we have not experienced much technological changes. Only the economical size as per the situational requirement has been changed on its design. 2. Primarily Devices: Circuit Breakers and Isolators are grouped under this section, focused for the operation and control on situational practices. The best and suitable technology on its design has been focused on its compact size, keeping these devices in side insulated gas, we call it as GIS (Gas Insulated Sub-Station).3. Sensors: Current and Voltage transformers (CT & VT) are grouped under this section that monitor and protect electrical current and voltage during normal and abnormal conditions. We have experienced remarkable change on this technology starting from Copper to Fiber concept. The conventional principle is of electromagnetic Induction, involved with heating due to iron loss, copper loss and quick deterioration and severe damage consequences. The recent technology is focused with fiber optic transformers that work on the principle of total polarization of light with easier connectivity to advance digital systems.4. The Processing Devices: This is the integration platform, where all the Sub-station devices get connected to the operators’ desk/panel to attend the functions like Monitoring, Supervision, Control, Operation and also protection in easier possible way.We have emerging technologies that grouped under modernization and data management that grouped under digitization. Both these modernization and digitization can attain our prime focus in electrical system to achieve the Power with Quality, Reliability, Safety and Security (PQRS).OPTCL (Odisha Power Transmission Corporation Limited), the backbone of Odisha Power System, the strategic link between Power Generation and Distribution. We have already complied our vision document in five-year business plan, emphasizing quick adoption of modernisation and digitisation in our system. Many of the initiatives enlisted in the vision document have already hit the road of success. Still to come with a long way in improving the standards of performance of OPTCL and to enhance its brand image.

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