"4,700 km of new 400 kV lines, 28 new and 110 modernized stations and a land direct current (DC) line - these are the pillars of the investment plans of PSE until 2034," it said in a statement.
PSE added the plan's implementation would enable a significant increase in potential for new renewable energy sources.
"It will allow, among other things, to deliver up to approximately 18 GW of power from offshore wind farms, approximately 45 GW from photovoltaic power plants and over 19 GW from wind farms," it said.
"Together with the production potential of other types of renewable energy sources, this means the possibility of producing approximately 160 TWh of renewable energy per year in a 10-year horizon."
The plan's implementation will also allow for the connection of a planned nuclear power plant in northern Poland and the commissioning of small nuclear reactors, PSE said.
