Fronius International Gmbh

Hannes Heigl

Harald Josef Kreuzer

Christian Angerer

Florian Guschlbauer

Dominik Pfaffenbichler

Christian Kasberger

Martin Wolf

Harald Hofer

Christoph Wolf

Johannes Mühlegger

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

Energy supply system includes at least one local energy supply unit, at least one local energy consumption unit at least one local energy store, and a control unit which controls the energy consumption, by the at least one local energy consumption unit of the energy supply system, of the volume of energy generated by the at least one local energy generation unit, and the volume of energy stored in the at least one energy storage unit. After detecting at least one predictable future event which will influence the volume of energy generable by the energy consumption units and/or the volume of energy which can be drawn from the energy supply network and/or the volume of energy consumed by the energy consumption units, the control unit dynamically adapts an energy reserve, stored in the at least one local energy store, as a function of the detected events.

Method for providing an energy reserve for an energy supply system

The invention relates to an inverter system () with several inverters (), each of which having at least one control unit (), with at least one line () each being provided between the inverters () for data exchange, as well as to an inverter (), and to a method of operating several inverters () in such an inverter system (). To achieve a high transmission safety, and a high data-transmission rate, it is provided that each inverter () has a communication device () which is connected to a control unit () of the inverter () and to the data lines () of two neighboring inverters (), and which has a switching device (), the switching device () being configured to switch the data lines () between a ring system and between a bus system logically based on this ring system.

Data exchange between inverters in an inverter system

The invention relates to a method for controlling the voltage and power of several HF inverters (), connected in parallel at the output, of an electrically isolated inverter assembly as well as for distributing the load to these HF inverters () each consisting of at least one DC-DC converter (), one intermediate circuit () and one DC-AC converter (), with a command variable (U') being formed for each HF inverter () so as to preset a nominal value for control of an intermediate-circuit voltage (U) at the intermediate circuit () of the HF inverter (). The load of each HF inverter () is determined by a control unit () by measuring the current or power required, an internal resistance of the HF inverter () is simulated via which internal resistance a virtual voltage drop (U) is caused which depends on the load determined and is used for controlling the voltage (U) of the intermediate circuit () so as to produce a purposive change in the output voltage of each HF inverter ().

Method for controlling inverters

The invention relates to a method for recognizing the operational state of a load () connected to the output () of an island inverter (). A load recognition signal (S) is applied at specific moments in time to the output () of the island inverter (), during which specific electric parameters are measured on the island inverter (), enabling the operational state of the load () to be determined, wherein the island inverter (), when the load () is activated, is switched from a possible standby mode into a permanent operation mode and, when the load is deactivated (), the island inverter is switched from a possible permanent operation mode to a standby mode. The invention also relates to an island inverter (). In order to ensure reliable recognition of all possible collected loads (), a load recognition signal (S) with parameters (T, d, A, H, f) that are modified at least according to the type of load () is applied to the output () of the island inverter ().

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Prambachkirchen, Austria

Hannes Heigl