‘HVDC system’ means an electrical power system which transfers energy in the form of high-voltage direct current between two or more alternating current (AC) buses and comprises at least two HVDC converter stations with DC transmission lines or cables between the HVDC converter stations;

‘DC-connected power park module’ means a power park module that is connected via one or more HVDC interface points to one or more HVDC systems;

‘embedded HVDC system’ means an HVDC system connected within a control area that is not installed for the purpose of connecting a DC-connected power park module at the time of installation, nor installed for the purpose of connecting a demand facility;

‘HVDC converter station’ means part of an HVDC system which consists of one or more HVDC converter units installed in a single location together with buildings, reactors, filters, reactive power devices, control, monitoring, protective, measuring and auxiliary equipment;

‘HVDC interface point’ means a point at which HVDC equipment is connected to an AC network, at which technical specifications affecting the performance of the equipment can be prescribed;

‘DC-connected power park module owner’ means a natural or legal entity owning a DC-connected power park module;

‘maximum HVDC active power transmission capacity’ (P_max) means the maximum continuous active power which an HVDC system can exchange with the network at each connection point as specified in the connection agreement or as agreed between the relevant system operator and the HVDC system owner;

‘minimum HVDC active power transmission capacity’ (P_min) means the minimum continuous active power which an HVDC system can exchange with the network at each connection point as specified in the connection agreement or as agreed between the relevant system operator and the HVDC system owner;

‘HVDC system maximum current’ means the highest phase current, associated with an operating point inside the U-Q/P_max-profile of the HVDC converter station at maximum HVDC active power transmission capacity;

‘HVDC converter unit’ means a unit comprising one or more converter bridges, together with one or more converter transformers, reactors, converter unit control equipment, essential protective and switching devices and auxiliaries, if any, used for the conversion.

F5“remedial action” means any measure applied by a TSO or more than one TSO, manually or automatically, in order to maintain operational security.