advertisement
ENERCON E-40 Operating Instructions
Page 26 of 96
3.4 Starting
After switching on the main switch on the E-40 control cabinet, the LC display will soon indicate "Turbine operational" (status 0:2), providing the control system has not detected a fault. There is no specific text assigned to status 0. Only the substatus 2 (turbine ready) is indicated. The rotor blades are pitched from the feathered position (approx. 90°) to 60° position and are allowed to "idle" (see below). The turbine then turns at a rotational speed of 6 rpm max.
Operation starts automatically if during three successive minutes the average wind speed is higher than the necessary start-up wind speed. By pressing the quick-start button the three-minute wind measuring can be suppressed and the start is initiated after a few seconds.
The starting procedure can only be initiated when the turbine is in automatic mode, i.e. when the red lamp above the "automatic / manual" switch does not light.
As soon as the starting procedure begins, the LC display shows status 0:1 (Turbine starting).
Status im LC-Display: 0 : 1
0 : 2
Turbine starting
Turbine operational
Provided there is enough wind, the blades are pitched forward until the minimum speed for supplying power is reached. While the blades are adjusted further towards 0°, the rotor speed and thus the power output of the turbine will increase gradually. The LC display now indicates status 0:0 (Turbine in operation).
3.5 Normal operation
Once the starting routine is completed, the wind energy converter is operating in normal operating mode. With increasing wind speed, the rotor speed and the power output will also increase. The pitch control units constantly adjust the blades according to the wind conditions so that an optimum operation is guaranteed.
The control and monitoring system continuously determines the wind conditions, optimizes rotor speed, generator excitations and generator power, adapts the position of the nacelle to the direction of the wind and monitors all of the sensors. The standby power supplies for the pitch control drives are tested regularly to ensure their readiness for use at any time.
If the wind speed is sufficient, the E-40 will reach its rated power output during the start and then continue to operate in automatic control mode. In the automatic control mode, the power output and rotor speed are kept constant at their rated values by adjusting the blade angles. For this, the appropriate blade angle changes are determined by evaluating the rotor speed measurements and are transmitted to the pitch control drives.
Status in the LC display: 0 : 0 Turbine in operation
Normally, the standard operating mode of the E-40 is the sound-optimized mode.
With older turbines it is possible to change the operating mode to power-optimized via the menu of the control system. With newer versions, sound- and poweroptimized operating modes are identical. For more details, please read chapter
5.3.6.
Operation
advertisement
