Transmission and Sub-Transmission Network India – Present and Future Rajesh Suri GE (T&D) India Ltd 8 November 2018

Planned Growth of Transmission Network in India Ref. National Electricity Plan – Transmission by Central Electricity Authority - 2016 Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Evolution of the Grid – HVDC Contribution Chandrapur 2 x 500 MW 1997 Visakhapatnam 500 MW 1999 Sasaram 500 MW 2002 Vindhyachal 500 MW 1989 Vindhyachal 500MW, 70kV B-to-B Asynchronous link W-N regions Chandrapur 2 x 500MW, 200kV B-to-B W-S regions Visakhapatnam 1 x 500MW, 200kV B-to-B E-S regions Sasaram E-N regions Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Evolution of the Grid - India Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Issues in Transmission Network Utilization of existing resources and systems to the maximum extent Transmission of bulk power over long distances efficiently Severe Right of Way constraints Uncertainty in Generation Control of flow of power Stability The world is moving towards a global energy market – create need for national and international grid interconnections Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Transmission Requirements Meet system requirements – active and reactive power during variations in load demand and contingencies Option of up-gradation / allow implementation in stages Transfer of allocated power with margins / long-term contractual requirement High Availability & Reliability Low cost to consumers

Uneven Distribution of Energy Sources Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Uneven Distribution of Energy Sources Energy Resources confined mostly to Eastern Region and NE Region and Load Centers in Western, Southern and Northern Regions, hence bulk power transmission over long distance. Future Solution: Long Distance HVDC Projects, like Champa-Kurukshetra Parallel HVDCs and FACTS devices to enhance existing network capability and resolve stability issues. Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Right of Way Issue The most challenging issue with the transmission sector is the Right of Way (ROW), high intensity transmission corridor (MW per meter ROW) is needed. Visual impact of sub-transmission network on big cities with densely populated urban areas, demands underground cable power transmission. Future Solution: More high Voltage Multi-Circuit AC transmission corridors (1200kV/765kV) and Long distance HVDC transmission, to reduce the ROW requirement. TCSC installation, to increases the power transfer capability as well as to improve system stability with existing network. Compact Sub-stations – GIS. VSC HVDCs for cities infeed, hence no ROW required and no visual impact. Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Right of Way Issue 1850MVA 5550MW AC DC 1850MW DC Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Power Regulation and Network Stability Due to increase in the complexity in power transmission network, stability and power regulation is issues difficult to handle. Future Solution: More long Distance and B-B HVDC Inter- Regional Links. FACTS devices and Phase Regulating Transformers to utilize the existing assets to the fullest extent as well as regulate the power in a particular direction Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Power Regulation and Network Stability Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Protect, Control, Monitor INDIA – unifieD real-time dynamic state MEASUREMENTS (URTDSM) – Grid SECURITY World’s largest grid Wide Area Monitoring System. Solution provided gives a view of the real-time state of the network power flow, allowing  to take preventive actions and ensuring grid stability 1,300 MiCOM P847 Phasor Measurement Units (PMU), to collect over 18,000 real-time synchronised measurements from 351 substations across the country. e-terraphasorpoint in 34 control centres at existing National, Regional and State Load Dispatch sites Protect, Control, Monitor Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Renewable Energy Growth Ref. National Electricity Plan – Transmission by Central Electricity Authority Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Renewable Energy Growth Increasing penetration of renewable energy, wind, solar etc. is challenge for transmission and sub- transmission network. Integration of these intermittent energy sources in Grid is a challenge. Planning of power flow network, because of intermittent nature of energy. Future Solution: VSC HVDCs to integrate these sources into Grid, to comply with grid codes, hence better power quality and reliability. Integrated system planning is required and not the earlier generation evacuation system planning Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Integrated Power System Network - Present Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018

Distributed Power System Network - Future Edit Presentation Title in [Insert Tab > Header & Footer] | 8 November 2018