ACTIVE AND REACTIVE POWER CAPABILITY. (a) All Synchronous Generating Units must be capable of supplying Rated Active Power (MW) at any point between the limits 0.85 Power Factor lagging and 0.95 Power Factor leading at the Synchronous Generating Unit terminals. For the avoidance of doubt, a Generating Unit operating at a lagging power factor delivers Reactive Power into the System. The short circuit ratio of Synchronous Generating Units shall be not less than 0.5.
(b) All Non-Synchronous Generating Units and Power Park Modules must be capable of supplying Rated Active Power (MW) at any point between the limits 0.95 lead to 0.95 lag at the Connection Point. For the avoidance of doubt, a Generating Unit operating at a lagging power factor delivers Reactive Power into the System. With all plant in service, the minimum reactive power capability, under steady state voltage conditions, is shown in Figure 1. Power Park Modules may reduce active power in order to achieve the required reactive power output, as long is this active power reduction is achieved within 5 seconds by the control system of the Power Park Module or Power Park Unit.
(i) Point A is equivalent (in MVAr) to 0.95 leading power factor at rated MW output.
(ii) Point B is equivalent (in MVAr) to 0.95 lagging power factor at rated MW output.
(iii) Point C is equivalent (in MVAr) to -5% of rated MW output.
(iv) Point D is equivalent (in MVAr) to 5% of rated MW output.
(v) Point E is equivalent (in MVAr) to -12% of rated MW output.
(vi) The values of C & D are fixed.
(vii) The values of A, B & E will be reduced based on the number of individual units running.
(ix) Within Xxxx 0 (X0, X0, X0, X0, X0) the Generator will control to voltage set- point instructions from the Company.
(x) Within Zone 2 (C1, C2, D2, D1) operation is at the discretion of the Generator. Operation out-with the rectangle (Zone 2) is acceptable if still controlling to the voltage set point described in Part viii.
(xi) Generating Unit controls shall be designed to ensure a smooth transition between Zones 1 & 2, and vice versa.
(c) Generating Unit must be capable of continuously supplying its rated Active Power output at the Generating Unit terminals within the System Frequency range 49.5 Hz to 50.5 Hz. Any decrease of Active Power output occurring in the frequency range 49.5 Hz to 47 Hz should be linear with frequency, such that if the system frequency drops to 47 Hz the active power output does not decrease by more than 5%. For the avoidance of doubt, in the case of a ...
