A Transmission System Operator (TSO) is an entity responsible for operating, maintaining, and developing the high-voltage electricity transmission grid. TSOs ensure the reliable and secure flow of electricity from generation sources to distribution networks or large industrial consumers. They play a vital role in balancing supply and demand, facilitating cross-border energy exchanges, and integrating renewable energy into the grid. TSOs are regulated to maintain transparency, neutrality, and grid stability across national and regional power markets.

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