Glossary

Offshore

Structures such as wind farms at open sea, situated beyond coastal waters (nearshore), are referred to as offshore.

Offshore Grid Development Plan

Up until the Offshore Grid Development Plan (O-GDP) 2014, the transmission system operators included the year in which the plan was produced in the title. From the O-GDP 2025 onwards, the target year was added to the title instead. This change thus brings the plans in line with the nomenclature of the German Federal Network Agency, which has been using the target year of the ten year forecasts in its communication surrounding the O-GDP for a long time. From the O-GDP 2030 (2017) onwards, the Offshore Grid Development Plan is to be replaced by the Offshore Area Development Plan, which will be produced by the Federal Maritime and Hydrographic Agency. 

Offshore wind farm
The term offshore wind farm is used to describe wind farms that have their foundations in the sea floor.
Onshore

Structures such as wind turbines that are built on land are referred to as onshore.

Operating reserve
The operating reserve is the generating capacity, which should be available to compensate for deviations in the balance of activities between the expected and actual conditions or which is held available for specific, predictable situations.
Operational management

As a system service, operational management covers all tasks of the network operators in the coordinated use of power stations (e.g. for frequency stability) and network management as well as those of the national and international interconnected operation using central and independently-controlled centres. Additionally, this also includes all measures regarding establishment and maintenance of the necessary requirements for the calculation and billing of all services performed.