The development of the Hellenic Electricity Transmission System (HETS) is one of the main duties of IPTO, in the framework of its role as Operator of the HETS.
The development of the System includes the planning and implementation of significant investments in order to ensure on the one hand the country's supply with electricity in an adequate, safe, efficient and reliable manner, and on the other, the long-term capability of the System to meet electricity transmission needs, on economically viable terms, to the benefit of society and the environment.
The main vehicle for the planning and scheduling of these investments is the Ten-year Network Development Plan (TYNDP). According to the provisions of Law 4001/2011 and the Grid Code, IPTO prepares and issues the Ten-year Network Development Plan for Greece, which has a rolling nature and is issued on an annual basis.
The Ten-year Network Development Plan includes the System development projects for each reference period, including the necessary infrastructures for RES penetration, as well as the time frames and the estimated cash flows for their implementation.