Frequency protection
ENERCON wind energy converters can be used in grids with a nominal frequency of 50 Hz or
60 Hz.
The range of operation of the E-82 E4 is defined by a lower and upper frequency limit value. Over‐
frequency and underfrequency events at the WEC reference point trigger frequency protection and
cause the WEC to shut down after the maximum delay time of 60 seconds has elapsed.
Power-frequency control
If temporary overfrequency occurs as a result of a grid fault, ENERCON wind energy converters
can reduce their power feed dynamically to contribute to restoring the balance between the gener‐
ating and transmission networks.
As a pre-emptive measure, the active power feed of ENERCON wind energy converters can be
limited during normal operation. During an underfrequency event, the power reserved by this limita‐
tion is made available to stabilise the frequency. The characteristics of this control system can be
easily adapted to different specifications.
Grid Management System
D0376616-2 / DA 8 of 21
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