4 Grid Management System
The annular generator is coupled to the grid through the ENERCON Grid Management System.
The main components of this system are a rectifier, a DC link, and several modular inverters.
Fig. 3: Simplified electric diagram of an ENERCON WEC
The Grid Management System, generator excitation and pitch control are all managed by the con‐
trol system to achieve maximum energy yield and excellent power quality.
Decoupling the annular generator from the grid guarantees ideal power transmission conditions.
Sudden changes in wind speed are translated into controlled change in order to maintain stable
grid feed. Conversely, possible grid faults have virtually no effect on WEC mechanics. The power
injected by the E-82 E4 can be precisely regulated from 0 kW to 2350/3000 kW.
In general, the features required for a certain wind energy converter or wind farm to be connected
to the receiving power grid are predefined by the operator of that grid. To meet different require‐
ments, ENERCON wind energy converters are available with different configurations.
The inverter system in the tower base is dimensioned according to the particular WEC configura‐
tion. As a rule, a transformer inside or near the wind energy converter converts 400 V low voltage
to the desired medium voltage.
Grid Management System
D0376616-2 / DA 6 of 21
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