MV – Medium Voltage
Medium voltage distribution level, typically ranging from 1 kV to 60 kV, in practice 15kV, 20kV in Poland, used for regional power distribution and connection of medium-scale renewable assets.
HV – High Voltage
High voltage transmission level, usually above 60 kV (e.g. 110 kV, 220 kV, 400 kV), used for large-scale power transmission and utility-scale renewable projects.
DSO – Distribution System Operator
The entity responsible for operating and maintaining the local and regional electricity distribution grid (LV, 15kV, 110kV)
TSO – Transmission System Operator
The entity responsible for operating and maintaining the national high-voltage transmission grid (220kV, 400kV)
GCC – Grid Connection Conditions
Official technical and commercial conditions issued by the grid operator defining how a project can be connected to the power grid.
Grid Connection Agreement (GCA)
A legally binding contract between the project owner and the grid operator specifying connection parameters, costs, timeline, and responsibilities.
Zoning Permit (Local Development Plan / Zoning Decision)
Administrative decision confirming that a given location may be used for a specific type of development, such as renewable energy infrastructure.
Environmental Decision (Environmental Permit / Environmental Impact Decision)
Regulatory approval confirming that the project complies with environmental protection requirements and may proceed to further development stages.
RtB – Ready-to-Build
Project status indicating that all key permits, land rights and grid conditions are in place, allowing immediate transition to construction.
SUB – Substation
Electrical facility where voltage levels are transformed and grid connections are physically executed between generation assets and the power system (110kV, 220kV, 400kV)
