Inter State Transmission System:
About 26 gigawatt of renewable energy (RE) projects are expected to be impacted with the end of waiver on inter-State transmission system (ISTS) charges provided for solar and wind projects, according to Crisil Ratings.
- It is a high-voltage power transmission network that enables electricity to flow seamlessly across state borders in India.
- It connects power-rich regions with energy-deficient areas.
- This ensures a balanced and efficient distribution of electricity.
- It is managed by the Central Transmission Utility of India Limited (CTUIL), a 100% subsidiary of Power Grid Corporation of India Limited (POWERGRID) under the Ministry of Power.
- ISTS operates at voltages above 132 kV and reduces transmission losses and enhances grid stability.
- This system allows solar and wind power to be transmitted nationwide and plays a crucial role in large-scale ISTS renewable energy projects.
- ISTS eliminates state-wise transmission restrictions and creates a unified energy market where electricity can be supplied based on demand.
Overcoming geographical constraints, ISTS makes the power sector more reliable and efficient. - Electricity is generated from various sources, including solar farms, wind parks, hydro plants, and thermal stations.
- The generated power is transmitted to ISTS substations, which are high-voltage facilities managed by the Central Transmission Utility (CTU). These substations step up the voltage to reduce transmission losses.
- The electricity is transported through a network of 132 kV and above transmission lines that span multiple states, ensuring minimal energy loss over long distances.
- The Regional Load Dispatch Centers (RLDCs) and the National Load Dispatch Center (NLDC) monitor and regulate electricity flow, ensuring supply matches demand.
- Power is stepped down at state-level substations and supplied to industries, businesses, and residential areas via the State Transmission Utility (STU) and local distribution networks.
