Ethos Power in association with Sieyuan Electric (Shanghai) has bagged an order from Delhi Transco Limited for design and supply of 220 KV GIS (Gas Insulated Switchgear) Substation in an International Competitive Bidding (ICB) that saw participation of energy majors such as Siemens, ABB, Tata-Hyosung, KEC and others. Delhi Transco Limited (DTL) is the Power Transmission Utility of the state of New Delhi.
The High-Voltage GIS Substation that is scheduled to be commissioned in Dec 2019 will inject a power of 320 MW into the grid of National capital of Delhi. GIS system would comprise a total of 22 GIS Bay Modules of 245 KV and 72.5 KV Voltage class. Ethos will also deliver advance digital control, protection and automation systems based on IEC 61850 protocol as part of the turnkey package. SCADA and Substation Automation Systems (SAS) shall enable remote control and monitoring of the complete substation from Remote centers for efficient power system management.
The GIS Substation to be supplied and installed at Delhi’s Sanjay Gandhi Transport Nagar (SGTN) will only require 1 Acre space compared to approximate 8 Acres required by a conventional AIS Substation.
GIS Technology has become a key enabler of urbanization as the Substation area has been reduced tremendously (at least 80%) compared to the conventional AIS (Air Insulated Switchgear) substations. Substations no longer require vast open spaces running in hectares but can be set up underground, within buildings or even on rooftops. GIS is a compact metal-enclosed switchgear that uses pressurized SF6 gas as the insulation medium for enabling safe high voltage switching operations.
Therefore, Power utilities of metropolitan cities like Delhi are prioritizing GIS technology over AIS to conserve valuable space, enhance safety and maintain city’s environment and aesthetics.
The project is critical for Delhi’s Transmission grid to survive the peak power demand that broke all records last summer to breach the 7000-Megawatt (MW) mark. It will immensely reduce the stress in Delhi’s transmission grid. Delhi’s peak power demand is substantially more than that of several cities and states. It is more than the power demand of Mumbai and Chennai put together and thrice than that of Kolkata. According to CEA (Central Electricity Authority), Delhi is consuming more electricity than any of the following individual states: Himachal Pradesh, Jammu & Kashmir, Uttarakhand, Chhattisgarh, Goa, Kerala, Bihar, Jharkhand, Odisha, Sikkim and all states of the North-east.