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5.4 PROTECTION ELEMENTS
Stage (1 - 2) Tap: This setting specifies the minimum Operation three-phase power for the Stage 1 (2) element. The power
value defined in this setting is the minimum distance between the source and the directional power characteristic. This
value can be positive or negative. The value of this setting is defined in total MW (primary) – the CT and VT value is
considered in the calculations.
NOTE:
Even if the element defined in this setting is MW, this does not necessarily mean that the resulting value and the RCA
setting are in MW. For example:
RCA : 30 º SMIN: 100 MW.
If we assume that there is only active power. The element operation would be produced for a value of:
P = 100 / cos (30) = 115,7 MW.
If there was only reactive power:
Q = 100/sin (30) = 200,0 MVar.
(In this case the real Operation elements are Mvar, even if SMIN is expressed in MW.)
Stage 1 (2)Time: This setting specifies the delay for Stage 1 of the element. For reverse power or direct power
applications, usually Stage 1 is used for alarm functions, while Stage 2 is used for tripping functions.
Snapshot Events: This setting enables or disables the generation of events. All states in this function are affected by this
setting.
5
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W650 Wind Generator Protection System
5 SETTINGS
GEK-113032A
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