Fronius International Gmbh

Florian Guschlbauer

Dominik Pfaffenbichler

Hannes Heigl

Martin Heidl

Hans-Peter Pimminger

Johannes Mühlegger

Michael Koren

Johannes Graf

Johannes Muehlegger

A photovoltaic system () includes an inverter unit () adapted to convert an electrical direct current (DC) power generated by photovoltaic modules () into an electrical alternating current (AC) power supplied via AC lines (), and a smart meter () connected to a power supply grid PSG (). The system further include an emergency unit () having a controller (A) adapted: a) to open an emergency switch () to automatically disconnect the photovoltaic system () from the power supply grid PSG () if a power supply grid failure is detected; and b) to notify a current switching state of the emergency switch () by means of power line communication (PLC) communication via the AC lines () to a controller of the inverter unit ().

Photovoltaic system

In a method for analyzing an electrical energy storage device, in particular an accumulator or a battery, the energy storage device is electrically connected to at least one consumer and to at least one electrical energy source in an electrical energy supply system. An electrical energy flow into or out of the energy storage device is directly or indirectly measured using a measuring unit, in particular a smart meter, and at least one energy storage device parameter is iteratively determined on the basis of recorded values of the measured energy flow. The energy flow is expressed by the unit energy per time, and an energy profile of the energy flowing into the energy storage device and extracted from the energy storage device is identified from the energy flow by integrating the energy flow over time. The at least one parameter is determined on the basis of the energy profile.

Method and system for analyzing an electrical stored energy source and energy supply system

A secure, reliable and simplified control mechanism for operating an inverter is provided. In particular, a mechanical switch is used for connecting a local grid with a public grid and for disconnecting the local grid from the public grid. The mechanical switch comprises an intermediate position. Each time when the switch is in this intermediate position, the inverter is immediately shut down in a fast shutdown operation.

Control arrangement, backup system and method for controlling an inverter

Growing community of inventors

Pettenbach, Austria

Florian Guschlbauer