Product solutions by SMA
SMA is already offering a range of reactive-power-compatible products: all newer central inverters, the Sunny Mini Central inverters with reactive power control, and the new Sunny Tripower are all designed for producing reactive power. The current central inverters of the HE series already meet all requirements of the Medium Voltage Guidelines, which will become effective in mid-2010, and offer shift factors of up to 0.90; the other devices even offer factors of up to 0.80.
Power Reducer Box – the all-rounder
The SMA Power Reducer Box is an additional communication solution for presetting the shift factor: in addition to remote-controlling the feed-in power, the device also lets you remote-select from up to 16 freely definable shift factors or reactive power values (the maximum values of the used inverters are to be considered here).
High tech with added value
The innovative Sunny Backup Sets by SMA take it one step further: in the case of public grid failure, a backup system will establish a fully functional island grid with the help of batteries and solar power. In this case, the battery inverter takes over the grid generation task and regulates the voltage, frequency, and reactive power compensation, while also filtering harmonics oscillations. It is able to deliver its entire nominal power as reactive power and can thereby regulate the phase shift in the island grid to any given value. After a software modification the Sunny Backup inverter would also be able to do this even with voltage on the line - and thereby relieve the low-voltage grid accordingly.