Abstract: An inverter and method of controlling an inverter, which is connected between a photovoltaic generator and a power supply network for ride-through of a network fault, is disclosed. A voltage dip is detected in the network voltage and the voltage of a DC voltage link of the inverter is monitored. When the DC link voltage exceeds an upper limit value, an operating mode for ride-through of the network fault is started. The upper limit value corresponds to a saturation voltage in the specific Iac/Udc characteristic curve of the inverter, above which the maximum AC output current of the inverter decreases. In the FRT operating mode, an energy dissipation device dissipates power from the DC voltage link and is controlled to keep the DC link voltage within a range below the saturation voltage.

Abstract: A method of controlling an inverter, which is connected between a photovoltaic generator and a power supply network for ride-through of a network fault, is disclosed. A voltage dip is detected in the network voltage and the voltage (Udc) of a DC voltage link of the inverter is monitored. When it is detected that the DC link voltage (Udc) exceeds an upper limit value (UTHup), an operating mode for ride-through of the network fault (FRT) is started. The upper limit value (UTHup) corresponds to a saturation voltage Udc,nom(max) in the specific Iac/Udc characteristic curve of the inverter, above which the maximum AC output current Iac,max of the inverter decreases. In the FRT operating mode, an energy dissipation device is activated, which is adapted to dissipate power from the DC voltage link, if necessary, and is controlled to keep the DC link voltage (Udc) within a range (Udc??U<Udc<Udc,nom(max)) below the saturation voltage (Udc,nom(max)).

Abstract: A method for feeding electrical power into an electrical power supply network is described. A configuration for supplying electrical power in the form of DC voltage has been provided and it is connected to the power supply network through an inverter. An MPP tracker (31) has been provided for influencing the inverter, from which an intermediate circuit desired voltage (udc, ref) is determined. A modulation regulator (33) has been provided, from which a given reactive power desired value (Qref) is changed to a reactive power value (Q*). The inverter (17) is influenced by the intermediate circuit desired value (udc, ref) and the reactive power value (Q*).

Abstract: A method for feeding electrical power into an electrical power supply network is described. A configuration for supplying electrical power in the form of DC voltage has been provided and it is connected to the power supply network through an inverter. An MPP tracker (31) has been provided for influencing the inverter, from which an intermediate circuit desired voltage (udc, ref) is determined. A modulation regulator (33) has been provided, from which a given reactive power desired value (Qref) is changed to a reactive power value (Q*). The inverter (17) is influenced by the intermediate circuit desired value (udc, ref) and the reactive power value (Q*).