Polskie Sieci Elektroenergetyczne S.A. (PSE) is Poland's state-owned transmission system operator (TSO), responsible for the operation, management, and maintenance of the national high-voltage electricity grid.
As the sole operator of lines above 220 kV, PSE oversees more than 15,000 km of transmission lines and over 100 substations, ensuring reliable power supply across the country by balancing generation and demand in real-time, integrating renewable sources, and managing cross-border electricity flows.
Headquartered in Konstancin-Jeziorna near Warsaw, PSE provides transmission services to electric utilities, distribution operators, end users, and power exchanges, while maintaining the security and economic efficiency of the Polish Power System under a license from the Energy Regulatory Office.
Also known as Puget Sound Energy, Inc., Physicians, Scientists, and Engineers for Healthy Energy, and Physicians Scientists And Engineers For Sustainable And Healthy Energy.
Choczewo substation now feeds Baltic Power and will route offshore wind into Poland’s 400 kV grid; full project completion is scheduled for 2027.
First foundations installed for a 1.5 GW offshore wind farm. 111 monopiles (107 turbine, 4 substation) to be installed through Q4 2026; commissioning expected in 2027; 25-yr CfD.
