Smart Grid Regulator with Asymmetrical Controlled Inverter

As the amount of decentralized generation is continuously increasing, the control and maintenance of grid stability become more complex. This is mainly caused by a change of production capacities from the high voltage area into the distribution network. As most of renewable energy sources in the distribution network are nowadays connected to power electronic converters, harmonic distortion as well as asymmetries (EV-chargers, household PV-systems) are increased. In order to ensure stability, reliability and efficiency of the energy distribution network a grid regulator including asymmetrical and harmonic control is introduced. This grid regulator consists of two inverter systems, where one is connected by a series booster transformer in line and the other one is connected in parallel to the line, capable of decoupling networks segments from each other. After a successful proof in a simulation, the control structure is implemented into a real hardware setup. The results show that the introduced system is able to decouple network elements by means of unbalanced situation as well as harmonics in voltage and current. Thereby it should be possible to increase stability and efficiency towards the rising amount of power electronic devices.