Aurora Electronics PVI-3600-OUTD-UK-F-W manual Main Elements of a Wind System

Installation and Operator’s Manual	Page 10 of 63
(PVI-3600-OUTD-UK-F-W Rev.: 1.0)

2.1Main Elements of a Wind System:

A wind system is composed of a wind turbine, a permanent magnet generator or alternator, Wind Interface Box and Aurora Wind inverter.

The output of wind turbine is converted from mechanical energy into electrical energy by the permanent magnet (PM) generator. The output of the PM generator is a variable frequency, variable voltage waveform, commonly referred to as “wild AC”.

The output of the PM generator is feed into the Wind Interface Box. The Wind Interface Box provides rectification and diversion load control. The diversion load control when connected to a properly sized resistive load provides control of the turbine output in high wind, over-speed conditions and loss of grid which will cause the unloading of the wind turbine. The diversion load is not a safety brake.

The Aurora Wind inverter changes the rectified output of Wind Interface box into useable AC which is supplied to the grid at pre- determined nominal voltage and frequency. The Aurora Wind inverter is supplied with the Wind turbine manufacturer’s model specific power curve. The model specific power curve is used by the Wind maximum power point tracking (MPPT) to extract the maximum amount of energy from the turbine at a given rpm.

WARNING: The DC voltage shall not exceed 600Vdc for any reason, so as to avoid damage to the equipment.

NOTE: A minimum DC input voltage value of 50Vdc is required to start-up the grid connection sequence of AURORA Wind. Once connected, AURORA will transfer to the grid the maximum power available from the string for any DC input voltage value in the range from 50Vdc to 530Vdc.