Sma Solar Technology Ag

Adensis Gmbh

Raycap S.a.

Alstom Sa

Smp Solar Technology Ag

Andreas Falk

Christian Hardt

Bernhard Beck

Marcel Kratochvil

Joachim Ralf Laschinski

Dirk Hermeling

Karl Nesemann

Gerold Schulze

Henning Schneider

Mario Willenberg

Aaron Philipp Gerdemann

Frank Niebling

Markus Hopf

Frank Greizer

Matthias Victor

Alexander Unru

Torsten Leifert

Martin Putz

Marek Rylko

Burkhard Müller

Oliver Arend

Volker Wachenfeld

Neidhardt Bechtel

Ralf Juchem

Sebastian Umlauf

Thomas Kuehn

Milosz Szarek

Raphael Knoke

Wolfgang Reichenbaecher

Peter Simon

Philipp Werb

Guido Bachmann

Andrzej Mondzik

Adam Penczek

Slawomir Szot

Robert Stala

Alexander Krug

Mathias Victor

Nafiz Yasat

Martin Rothert

Thomas Krämer

Jerzy Maslon

Mitosz Szarek

Franz Lukas

Christian Ruehling

Peter Witsch

Jens-Uwe Mueller

Jan Goldau

Jochen Roemer

Max Rothenburger

Marek Ryklo

Jens-Uwe MÜLLER

Christian Rühling

Schulze Gerold

Wolfgang Reichenbächer

A method and related apparatus for extending a DC voltage range of a rectifier circuit for the supply, from an AC grid, of a DC load which is connected to a DC rectifier output of the rectifier circuit, wherein an AC rectifier input of the rectifier circuit is connected via a grid connection point to the AC grid, wherein the rectifier circuit includes an AC/DC converter having an AC input and a DC output, wherein the AC/DC converter includes a converter circuit having semiconductor switches and freewheeling diodes connected in an antiparallel arrangement thereto, wherein an inductance is connected between the AC input of the AC/DC converter and the grid connection point. The method includes setting a desired DC operating voltage Uon the DC output of the AC/DC converter or on the DC rectifier output, or both, by an actuation of semiconductor switches of the AC/DC converter, wherein, when the desired DC operating voltage Ulies below a value of an amplitude Ûof an alternating voltage on the AC input of the AC/DC converter, the semiconductor switches of the AC/DC converter are actuated for an exchange of reactive power Q(t) with the AC grid, which has a voltage-lowering effect upon the amplitude Ûof the AC voltage at the AC input of the AC/DC converter, such that the amplitude Ûapproaches the desired DC operating voltage U, and wherein the exchange of the reactive power Q(t) with the AC grid is executed during or shortly before an electrical connection or an electrical isolation of the DC load to or from the rectifier circuit.

Method for extending a voltage range of a rectifier, rectifier for carrying out the method, and electrolysis system

A method for operating a hybrid rectifier includes an AC input, a DC output and a thyristor rectifier arranged in a first path, and a transistor rectifier arranged in a second, parallel path. The method includes when a DC voltage at the DC output of the hybrid rectifier is below a voltage threshold value, operating the hybrid rectifier in a first operating state in which the transistor rectifier is isolated from the DC output and connected to the AC input and the thyristor rectifier is connected both to the AC input and to the DC output. When the DC voltage at the DC output of the hybrid rectifier reaches or exceeds the voltage threshold value, operating the hybrid rectifier in a second operating state in which the thyristor rectifier and the transistor rectifier are each connected to the AC input and to the DC output.

Method for operating a hybrid rectifier, hybrid rectifier, and electrolytic system having such a hybrid rectifier

A method for ascertaining a load flow map within an AC-voltage power supply grid, wherein a plurality of grid subscribers are each arranged at a respective grid connection point in the power supply grid, includes ascertaining, by each of the plurality of grid subscribers, a respective value reflecting an individual phase angle (ϕ) of the AC voltage of the power supply grid at the respective grid connection point of each of the plurality of grid subscribers. The method also includes transmitting the respective values in the form of data from the respective plurality of grid subscribers to a superordinate data receiver; and evaluating the data and generating a load flow map based on the values reflecting the individual phase angles (ϕ).

Method and arrangement for ascertaining a load flow map within an ac-voltage power supply grid

A converter device configured to exchange power between a first grid and a second grid, including a first inverter configured to connect on an AC side thereof to the first grid, and connected on a DC side thereof to a link circuit of the converter device, and a second inverter configured to connect on an AC side thereof to the second grid, and connected on a DC side thereof to the link circuit. The converter device also includes a solar generator connected to the link circuit, a first controller operably coupled to the first inverter and configured to set a specified converter power of the first inverter, and a second controller operably coupled to the second inverter and configured to set a voltage of the link circuit such that a power of the solar generator optimized according to a predetermined criteria.

Converter apparatus and operating method

The disclosure relates to a device and associated method for electrolysis from photovoltaically generated DC power, including an electrolyzer and a DC/DC converter. The DC/DC converter feeds DC power to the electrolyzer, the DC power is generated by a photovoltaic (PV) sub-generator connected to the DC/DC converter. The PV sub-generator is connected to the DC/DC converter via a first disconnector that is coupled to an isolation monitoring structure in such a way that closure of the first disconnector requires a successful check for sufficient isolation of the PV sub-generator. The PV sub-generator has a main string and a second disconnector arranged between the main string and the first disconnector. The second disconnector is coupled to a fault current monitoring circuit in such a way that the second disconnector is opened in the event that a predefinable limit value of the fault current is exceeded.

Device for electrolysis from photovoltaically supplied power and a method of operating such a device

A method for operating an electrolysis device, having a converter which is connected on an AC voltage side to an AC voltage grid via a decoupling inductance and draws an AC active power from the AC voltage grid, and an electrolyzer, which is connected to the converter on the DC voltage side, is provided. The method includes operating the electrolysis device, when a grid frequency corresponds to a nominal frequency of the ACT voltage grid and is substantially constant over a time period, with an electrical power which is between 50% and 100% of a nominal power of the electrolyzer, and operating the converter in a voltage-impressing manner, such that an AC active power drawn from the AC voltage grid is changed on the basis of a change and/or a rate of change of the grid frequency in the AC voltage grid.

Electrolysis device having a converter and method for providing instantaneous reserve power for an AC voltage grid

A container for an energy supply system includes a first section configured to accommodate an air-conditioning unit and/or a control circuit during transport of the container and operation of the energy supply system, and a second section configured to accommodate an energy conversion unit during transport of the container. The energy conversion unit is configured to be selectively removed from the container, and the second section includes a fixing structure for shelf units, such that, after the energy conversion unit has been removed from the container, the shelf units are configured to be installed on the fixing structure and can be fitted with storage modules.

Energy supply sub-system for an energy supply system, energy supply system, and method for providing same

The disclosure describes a method for operating an energy supply installation which is connected to an AC supply grid via a transformer, and exchanges electrical power with the AC supply grid via the transformer. The transformer is connected on a first side to the AC supply grid and on a second side to an AC installation grid of the energy supply installation, wherein the energy supply installation has at least one inverter which exchanges electrical power between a DC unit on the DC side of the inverter and the AC installation grid on the AC side of the inverter. The method includes receiving at least one parameter of the power conversion of the at least one inverter by an installation controller, determining a setpoint AC voltage for the AC installation grid by the installation controller according to the parameter, transmitting the setpoint AC voltage to the transformer.

Method for operating an energy supply system, system controller for an energy supply system, and energy supply system

A converter includes an input configured to be connected to a DC source, at least one transducer module coupled to the input, and comprising a first, a second and a third bridge arm, wherein each of the bridge arms respectively has a phase output, and a common DC link circuit coupled to the input and the bridge arms. The first and second bridge arms are configured to provide a first power in the form of alternating current at their respective phase outputs. An energy store is configured to be connected to the phase output of the third bridge arm, and the third bridge arm is configured to exchange a second power between the DC source and the energy store and between the energy store and the DC link circuit/ A control unit is configured to control the bridge arms in such a manner that the sum of the first power and the second power corresponds to a constant set point.

Converter comprising at least one converter module with three bridge branches, operating method, and use of such a converter

A solar module includes a series circuit of solar cells, a switch arranged in parallel with a section of the series circuit, and an actuation circuit. The actuation circuit is operably coupled to the switch, and is configured to actuate the switch in a clocked manner with a duty cycle, wherein the duty cycle is based on a voltage dropped across the series circuit or across a portion of the series circuit.

Solar module, photovoltaic system, and voltage limitation method

A solar module includes one or more photovoltaic (PV) modules, a short-circuit switch connected in parallel with at least one of the one or PV modules, and a control unit connected in parallel with the short-circuit switch. The at least one of the one or more PV modules supplies electrical power to the control unit and is connectable via a first and a second module terminal to further solar modules to form a string. The control unit is configured to actuate the short-circuit switch depending on an insulation voltage dropped between a ground potential reference terminal of the solar module and one of the first and second module terminals.

Solar module, operating method for a solar module, and photovoltaic system

A method for operating an island system is disclosed. The island system includes a group of voltage-controlling converters, wherein each of the voltage-controlling converters of the group are configured to convert power of respectively connected regenerative power sources into AC power in accordance with a respective frequency-power characteristic curve. The island system also includes a load having a power consumption that depends on a voltage amplitude of an AC voltage of the island system, and a control unit that is configured to transmit a default value of the voltage amplitude to the group of voltage-controlling converters. The method adapts the power to be consumed by the load.

Method for operating an island system, and island system

A network subscriber unit for an electrical energy supply network includes a control unit configured to control the power exchange of the network subscriber unit with the energy supply network, a device configured to determine a voltage zero crossing at a connection point of the network subscriber unit with the energy supply network and a receiving unit of the network subscriber unit configured to receive a signal of a reference time. The control unit is in this case configured to determine a time offset between a time of the voltage zero crossing determined by the device and the received reference time and to control the power exchange based on the time offset.

Network subscriber network using zero crossing for control of power exchange

A circuit for limiting the voltage of a photovoltaic string divided into a first section and a second section of a series circuit of solar modules, includes a first terminal for connection to a first end of the first section, a second terminal for connection to a first end of the second section and a third terminal for connection to a second end of the second section. The circuit also includes a bypass switch, which is connected at one end to the first terminal and at the other end to the third terminal and a disconnect switch, which is connected at one end to the first terminal and at the other end to the second terminal. The circuit has a controller for actuating the bypass switch and the disconnect switch, wherein the controller is configured to determine a first threshold value Uand a second, lower threshold value Udepending on a switch voltage Udropped across the disconnect switch in an open state and taking into account the number of solar modules in the first section and in the second section.

Circuit for voltage limitation in a photovoltaic field, photovoltaic field, and method for voltage limitation

Growing community of inventors

Kassel, Germany

Andreas Falk