Patent ID: 9118212
Filing Date: 2015-08-25
Classification: H02J,Y02E

Abstract:
1. Inverter system for a photovoltaic solar installation for generating an AC voltage from a DC voltage of a solar generator, including: an intermediate circuit which comprises DC voltage branches which are connectable to the solar generator without interconnection of a DC/DC converter, and at least one storage device which is arranged between the DC voltage branches for interim storage of energy of the solar generator; an inverter connected to the intermediate circuit for converting an intermediate circuit DC voltage present between the DC voltage branches to an inverter output side AC voltage; a selectively activatable energy transfer path connected between the DC voltage branches; an energy storage device arranged in the energy transfer path for receiving and storing energy; a supervisory control arrangement for monitoring and controlling the operation of the inverter system, which includes a measuring arrangement for detecting a momentary insolation energy and supplying corresponding characteristic values to the supervisory control arrangement and the supervisory control arrangement includes a comparison arrangement for comparing the momentary insolation energy with a threshold value which is determinable as the limit value in order to determine whether insolation peak conditions are present, and if present, initiate an energy storage device, and wherein the supervisory control arrangement includes an MPP-tracker arrangement for adjusting the operating point of the solar generator for optimum power generation always such that the solar generator provides the highest possible power output available with the momentary insolation conditions and the supervisory control arrangement for setting the inverter to a voltage of the solar generator characteristic line which corresponds to the operating point of the solar generator with the momentary highest energy yield, said supervisory control arrangement for detecting at least one parameter which is characteristic of the momentary insolation energy at the solar generator and for evaluating it for a determination whether this parameter exceeds a predeterminable limit value for activating the energy transfer path for causing a transfer of energy from the solar generator to the energy storage device.