General provisions
1. The requirements set out in this Chapter apply to the connection to the network of AC-connected power park modules located offshore. An AC-connected power park module located offshore which does not have an offshore connection point shall be considered as an onshore power park module and thus shall comply with the requirements governing power park modules situated onshore.
2. The offshore connection point of an AC-connected offshore power park module shall be specified by the relevant system operator.
3. AC-connected offshore power park modules within the scope of this Regulation shall be categorised in accordance with the following offshore grid connection system configurations:
(a)
configuration 1: AC connection to a single onshore grid interconnection point whereby one or more offshore power park modules that are interconnected offshore to form an offshore AC system are connected to the onshore system;
(b)
configuration 2: meshed AC connections whereby a number of offshore power park modules are interconnected offshore to form an offshore AC system and the offshore AC system is connected to the onshore system at two or more onshore grid interconnection points.
Frequency stability requirements applicable to AC-connected offshore power park modules
The frequency stability requirements laid down respectively in Article 13(1) to (5), except for Article 13(2)(b), Article 15(2) and Article 21(2) shall apply to any AC-connected offshore power park module.
Voltage stability requirements applicable to AC-connected offshore power park modules
1. Without prejudice to point (a) of Article 14(3) and point (a) of Article 16(3), an AC-connected offshore power park module shall be capable of staying connected to the network and operating within the ranges of the network voltage at the connection point, expressed by the voltage at the connection point related to reference 1 pu voltage, and for the time periods specified in Table 10.
2. Notwithstanding the provisions of paragraph 1, the relevant TSO in Spain may require AC-connected offshore power park modules to remain connected to the network in the voltage range between 1,05 pu and 1,0875 pu for an unlimited period.
3. Notwithstanding the provisions of paragraph 1, the relevant TSOs in the Baltic synchronous area may require AC-connected offshore power park modules to remain connected to the 400 kV network in the voltage range and for the time periods that apply to the Continental Europe synchronous area.
Table 10
Synchronous area
Voltage range
Time period for operation
Continental Europe
0,85 pu-0,90 pu
60 minutes
0,9 pu-1,118 pu ( *1 )
Unlimited
1,118 pu-1,15 pu ( *1 )
To be specified by each TSO, but not less than 20 minutes and not more than 60 minutes
0,90 pu-1,05 pu ( *2 )
Unlimited
1,05 pu-1,10 pu ( *2 )
To be specified by each TSO, but not less than 20 minutes and not more than 60 minutes
Nordic
0,90 pu-1,05 pu
Unlimited
1,05 pu-1,10 pu ( *1 )
60 minutes
1,05 pu-1,10 pu ( *2 )
To be specified by each TSO, but not more than 60 minutes
Great Britain
0,90 pu-1,10 pu ( *1 )
Unlimited
0,90 pu-1,05 pu ( *2 )
Unlimited
1,05 pu-1,10 pu ( *2 )
15 minutes
Ireland and Northern Ireland
0,90 pu-1,10 pu
Unlimited
Baltic
0,85 pu-0,90 pu ( *1 )
30 minutes
0,90 pu-1,118 pu ( *1 )
Unlimited
1,118 pu-1,15 pu ( *1 )
20 minutes
0,88 pu-0,90 pu ( *2 )
20 minutes
0,90 pu-1,097 pu ( *2 )
Unlimited
1,097 pu-1,15 pu ( *2 )
20 minutes
The table shows the minimum period during which an AC-connected offshore power park module must be capable of operating over different voltage ranges deviating from the reference 1 pu value without disconnecting.
4. The voltage stability requirements specified respectively in points (b) and (c) of Article 20(2) as well as in Article 21(3) shall apply to any AC-connected offshore power park module.
5. The reactive power capability at maximum capacity specified in point (b) of Article 21(3) shall apply to AC-connected offshore power park modules, except for Table 9. Instead, the requirements of Table 11 shall apply.
Table 11
Parameters for Figure 8
Synchronous area
Maximum range of Q/P max
Maximum range of steady-state voltage level in PU
Continental Europe
0,75
0,225
Nordic
0,95
0,150
Great Britain
0 ( *3 )
0,33 ( *4 )
0,225
Ireland and Northern Ireland
0,66
0,218
Baltic
0,8
0,22
Robustness requirements applicable to AC-connected offshore power park modules
1. The robustness requirements of power-generating modules laid down in Article 15(4) and Article 20(3) shall apply to AC-connected offshore power park modules.
2. The fault-ride-through capability requirements laid down in point (a) of Article 14(3) and point (a) of Article 16(3) shall apply to AC-connected offshore power park modules.
System restoration requirements applicable to AC-connected offshore power park modules
The system restoration requirements laid down respectively in Article 14(4) and Article 15(5) shall apply to AC-connected offshore power park modules.
General system management requirements applicable to AC-connected offshore power park modules
The general system management requirements laid down in Article 14(5), Article 15(6) and Article 16(4) shall apply to AC-connected offshore power park modules.
