Patent ID: 11967929
Assignee: FRONIUS INTERNATIONAL GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 10:
11. A method for operating a photovoltaic system comprising an inverter which has a base station connected by means of power cables to module level devices of a photovoltaic generator, the method comprising steps of:
supplying, by photovoltaic modules of the photovoltaic generator via the power cables, a DC power to said inverter;
converting, by the inverter, the supplied power into an AC current supplied to an AC power supply grid;
monitoring and/or controlling, by the module level devices of the photovoltaic generator, associated photovoltaic modules of the photovoltaic generator;
activating, by a controller of the photovoltaic system, if the inverter does not receive sufficient energy from the photovoltaic generator and the AC power supply grid, a deadlock prevention mode of an energy supply unit connected to the inverter in which the inverter receives energy from the energy supply unit such that the base station of the inverter is able to continue to transmit permission to operate (PTO) signals via the power cables to the module level devices of the photovoltaic generator;
switching, by the controller, the energy supply unit of the photovoltaic system into different operation modes; and
storing state of charge (SoC) levels which are used by the energy supply unit for controlling the operation modes of the energy supply unit, in configuration registers of the controller.