Fraunhofer Solar Inverter Lab

the 3MW laboratory medium voltage transformers are available Manufacturers can characterize their products in the megawatt laboratory and can perform all the relevant certification exams. The Low Voltage Ride Through test facility can test the behavior of the inverter voltage drops in the medium voltage network, as required under the new directives, according to the laboratory director S?nke Rogalla.

For the 3MW laboratory medium voltage transformers are available with a capacity of 1.25MW, which are connected to the 20 kV network. A transformer supplies the solar simulators, which provide a voltage of up to 1,000 volts and a current of up to 1000 A for the tested inverters available. The other two transformers are used for feeding. The voltage is 255-790 volts adjustable to ensure that all current international tensions are covered.Remote control can turn off the 20 kV transformers and line voltage dips and create different depth and duration.

In addition to the required tests, the laboratory offers megawatts on an area of 250 square meters of comprehensive analytics for the optimization of inverters. The Fraunhofer researchers measured, for example, in addition to the conversion efficiency and the adaptation or MPP tracking efficiency. This often ignored test describes the ability of a solar inverter, and the maximum power can be seen from the attached cells at any time.