Active Front End Inverters for Renewable Energies
Energy produced by wind turbines and in solar parks is fed into the public electricity grid. For this purpose, active front end inverters of variable outputs are necessary. In order to guarantee stability of electric supply, the various specifications of grid operators are to be observed. As a result the active power at too high mains frequency can be limited, especially reactive power to increase or to reduce supply voltage is fed in. Also in case of a faulty grid, a well-defined conduct (e.g. LVRT) is imperative.
We have developed our own electronic control systems, which are specially adapted to the operation for grid inverters.