ANNEX VIISupplementary provisions
ANNEX VII Voltage ranges and time periods referred to in Article 40 Voltage Range Time period for operation 0,85 pu-0,90 pu 60 minutes 0,90 pu-1,10 pu Unlimited 1,10 pu-1,118 pu Unlimited, unless specified otherwise by the relevant system operator, in coordination with the relevant TSO. 1,118 pu-1,15 pu To be specified by the relevant system operator, in coordination with the relevant TSO. Table 9 : Minimum time periods for which a DC-connected power park module shall be capable of operating for different voltages deviating from a reference 1 pu value without disconnecting from the network where the voltage base for pu values is from 110 kV to (not including) 300 kV. Voltage Range Time period for operation 0,85 pu-0,90 pu 60 minutes 0,90 pu-1,05 pu Unlimited 1,05 pu-1,15 pu To be specified by the relevant system operator, in coordination with the relevant TSO. Various sub-ranges of voltage withstand capability can be specified. Table 10 : Minimum time periods for which a DC-connected power park module shall be capable of operating for different voltages deviating from a reference 1 pu value without disconnecting from the network where the voltage base for pu values is from 300 kV to 400 kV (included). 0,65 Production (lag) Consumption (lead) 0,5 0,4 0,6 0,7 0,1 0,2 0,3 0 – 0,1 – 0,2 – 0,4 Q/Pmax – 0,6 – 0,5 – 0,3 Range of Q/Pmax Fixed outer envelope Voltage range Inner envelope 0,8 0,85 0,9 1,0 1,1 1,15 U [p.u.] Figure 7 : U-Q/Pmax-profile of a DC-connected power park module at the connection point. The diagram represents boundaries of a U-Q/Pmax-profile of the voltage at the connection point[s], expressed by the ratio of its actual value to its reference 1 pu value in per unit, against the ratio of the reactive power (Q) to the maximum capacity (Pmax). The position, size and shape of the inner envelope are indicative and other than rectangular may be used within the inner envelope. For profile shapes other than rectangular, the voltage range represents the highest and lowest voltage points. Such a profile would not give rise to the full reactive power range being available across the range of steady-state voltages. Range of width of Q/Pmax profile Range of steady-state Voltage level in pu 0-0,95 0,1-0,225 Table 11 : Maximum and minimum range of both Q/Pmax and steady-state voltage for a DC-connected PPM