#SMA SOLAR TECHNOLOGY AG [DE]

Current sensing arrangement in an inverter

The apparatus has an inverter housing (7) provided with a safety fuse (8). Positive direct current voltage (Plus Uzwk) or negative direct current voltage (Minus Uzwk) is grounded through the safety fu…

DRIVE·Jan 18·1 min read

H01H85/0241 SMA SOLAR TECHNOLOGY AG [DE]

Method for operating an inverter

The method connecting direct-voltage input to a power supply grid via an alternating-voltage output. The inverter is involved in a power flow interaction with the grid in such a manner that leakage cu…

DRIVE·Oct 12·1 min read

G05F1/67 SMA SOLAR TECHNOLOGY AG [DE]

Device for converting electrical energy and method for operating such a device

The device has a two-stage structure with a single direct current (DC)/DC converter stage (3) for generating an intermediate circuit voltage from an output voltage of electrochemical storage or a fuel…

DRIVE·Sep 14·1 min read

H02J1/10 SMA SOLAR TECHNOLOGY AG [DE]

Inverter with onboard network with multiple supplies

The inverter (1) has a direct current to alternating current (DC/AC) converter (5) connected to an alternating current (AC) network (4). A direct current to direct current (DC/DC) converter (9) is con…

DRIVE·Sep 7·1 min read

H02J3/381 SMA SOLAR TECHNOLOGY AG [DE]

Equalisation of the partial outputs flowing over the individual phases of a multi-phase alternating current

The method involves detecting differences between partial outputs flowing over line conductors (9-11) by using measuring devices (12) i.e. counting devices, and reducing the differences in the partial…

DRIVE·Jul 27·1 min read

H02J3/26 SMA SOLAR TECHNOLOGY AG [DE]

Feeding electrical energy of distributed energy sources into an alternating current network

The method involves producing commands (11) of an inverter (5) at a central transfer point (4) for maintaining a reference value (15) of a physical parameter of supplied electric energy. The commands …

DRIVE·Jun 22·1 min read

H02J3/381 SMA SOLAR TECHNOLOGY AG [DE]

Wireless communication network over a defined group of participants

The method involves assimilating a set of pre-defined devices e.g. spatially distributed inverters (1) and data loggers (5), for a limited period of time. A network identification is generated and is …

DRIVE·Jun 15·1 min read

H02J13/1331 SMA SOLAR TECHNOLOGY AG [DE]

Start up of a photovoltiac field with high open circuit voltage

The method involves precharging a direct current (DC) voltage intermediate circuit (7) at an input of an inverter (3) e.g. three-phase inverter, from an alternating current network (4). Charging curre…

DRIVE·May 25·1 min read

H02J3/36 SMA SOLAR TECHNOLOGY AG [DE]

Starting a DC/DC converter with high-frequency transformer

The method involves loading a primary winding (3) by clocked switches (V1,V2) having an inverter bridge (7) made of an input sided voltage intermediate circuit (5). The secondary winding (4) charges a…

DRIVE·Mar 23·1 min read

H02J3/381 SMA SOLAR TECHNOLOGY AG [DE]

Method and Apparatus for determining possible deliverable power for given irradiation conditions

The method involves calibrating radiation signal (10) of a radiation sensor (9) using associated measured values without power output limitation of a photovoltaic system (2) by a feeder line (11). The…

DRIVE·Mar 16·1 min read

H02J3/381 SMA SOLAR TECHNOLOGY AG [DE]

Method and device for connecting at least one string of a photovoltaic assembly with an inverter

The arrangement has a first safety switch (6) selectively coupling a terminal (16) of a substring (3) to a power cable (10) of an inverter. A second safety switch (7) selectively couples another termi…

DRIVE·Mar 16·1 min read

H02J3/381 SMA SOLAR TECHNOLOGY AG [DE]

Method of converting a DC voltage of a DC source, in particular of a photovoltaic DC source, in an AC voltage

An alternating current (AC) voltage circuit is decoupled from a direct current (DC) voltage circuit during free-wheeling phases using switching elements (V1-V4) arranged in the direct current voltage …

DRIVE·Mar 2·1 min read

H02M7/48 SMA SOLAR TECHNOLOGY AG [DE]

Reverse current sensor for solar modules connected in parallel

The system (1) has a transformer (12) to feed electrical energy from bus conductors (8, 9) into a power grid (2), and a controller (11) to adjust the voltage drop between the bus conductors. A current…

DRIVE·Feb 16·1 min read

H02J1/10 SMA SOLAR TECHNOLOGY AG [DE]

Device for feeding in electrical energy of a number of strings of photovoltaic modules in an electricity network

The device (1) has a connection terminal (7) comprising an over-current protection unit that includes a power switch (9) for selectively disconnecting strings (2). A central insulation monitoring unit…

DRIVE·Feb 9·1 min read

G01R31/12 SMA SOLAR TECHNOLOGY AG [DE]