Abstract: A method for determining a value representative of the remaining useful life, RUL, of a capacitor, the method comprising the following operations: repeating for several iterations 1 to k, k being an integer greater than 1: acquiring environment measurements that are representative of the environment of the capacitor at a current iteration; based on previous environment measurements acquired at previous iterations 1 to k?1 before the current iteration, and on the received environment measurements at iteration k, calculating at least one aging model; based on the at least one calculated aging model, determining the value representative of the RUL of the capacitor.

Abstract: A protection circuit intended to be connected between an electrical energy source and an overvoltage-sensitive device. A current limiting circuit and a current monitoring circuit are connected in series, a reference voltage generator circuit delivering a reference voltage, and a balancing circuit is intended to control the current monitoring circuit so that the voltage at a point of connection between the current limiting circuit and the current monitoring circuit is substantially equal to the reference voltage. An electrical measurement or power supply device including at least one such overvoltage protection circuit.

Abstract: Method for controlling a generator comprising an inverter and an electrical energy source, the generator being configured to deliver output electrical values to an electrical distribution grid, the inverter being controlled by a control law, the control law comprising a set of fixed values of parameters for modelling the functioning of a synchronous virtual generator so that the control law is configured to determine at least one target output value that must be delivered by the generator to the electrical distribution grid.

Abstract: A method for determining a value representative of the remaining useful life, RUL, of a capacitor, the method comprising the following operations: repeating for several iterations 1 to k, k being an integer greater than 1: acquiring (304) environment measurements that are representative of the environment of the capacitor at a current iteration; based on previous environment measurements acquired at previous iterations 1 to k-1 before the current iteration, and on the received environment measurements at iteration k, calculating at least one aging model; based on the at least one calculated aging model, determining the value representative of the RUL of the capacitor

Abstract: According to one aspect, embodiments of the invention provide an inverter system including an input having a positive DC node and a negative DC node coupled to a DC power source to receive input DC power, an output coupled to a load to provide output AC power, a first inverter leg including a first and a second switching device, a second inverter leg including a third and a fourth switching device, the first inverter leg and the second inverter leg being adapted to convert the input DC power to the output AC power, a current sensor coupled to one of the negative and the positive DC node, and a controller assembly adapted to measure a current through the current sensor and determine an inductor current through an inductor coupled to the output, an input current, and an output current based at least on the current through the current sensor.

Abstract: A method of controlling a generator including an inverter with electronic switches which, controlled on the basis of instantaneous cyclic ratios ?abc, enable the inverter to deliver to an electrical distribution grid an electrical power Pabc at an AC voltage Vabc, termed the source voltage, and an AC current Iabc, termed the source current, the voltage Vabc and current Iabc having a frequency fabc, the inverter being controlled by a control law that includes: a) an integration loop to evaluate a difference ? between the current Iabc and a grid current Ir actually required by the electrical distribution grid; b) a correction loop which, as soon as the difference ? is greater than a difference ?* termed the reference difference, controls the adjustment by the source current inverter of the instantaneous cyclic ratios ?abc so as to reduce the difference ? to a value less than the reference difference ?*.

Abstract: A protection circuit intended to be connected between an electrical energy source and an overvoltage-sensitive device. A current limiting circuit and a current monitoring circuit are connected in series, a reference voltage generator circuit delivering a reference voltage, and a balancing circuit is intended to control the current monitoring circuit so that the voltage at a point of connection between the current limiting circuit and the current monitoring circuit is substantially equal to the reference voltage. An electrical measurement or power supply device including at least one such overvoltage protection circuit.

Abstract: According to one aspect, embodiments of the invention provide an inverter system including an input having a positive DC node and a negative DC node coupled to a DC power source to receive input DC power, an output coupled to a load to provide output AC power, a first inverter leg including a first and a second switching device, a second inverter leg including a third and a fourth switching device, the first inverter leg and the second inverter leg being adapted to convert the input DC power to the output AC power, a current sensor coupled to one of the negative and the positive DC node, and a controller assembly adapted to measure a current through the current sensor and determine an inductor current through an inductor coupled to the output, an input current, and an output current based at least on the current through the current sensor.

Abstract: An active filtering system arranged for being connected between a first power supply line and a second power supply line of a DC bus, the bus being arranged for being connected to a DC voltage source located upstream, the system including a first capacitor arranged for being connected both to the first power supply line of the bus and to the second power supply line of the bus and to the terminals whereof a voltage is applied including an AC component, a switching assembly controlled by a processor for generating a compensation voltage, opposite to the AC component of the voltage at the terminals of the first capacitor, and including a first terminal connected to the first capacitor and a second terminal intended to be connected to the second power supply line.

Abstract: An active filtering system arranged for being connected between a first power supply line and a second power supply line of a DC bus, the bus being arranged for being connected to a DC voltage source located upstream, the system including a first capacitor arranged for being connected both to the first power supply line of the bus and to the second power supply line of the bus and to the terminals whereof a voltage is applied including an AC component, a switching assembly controlled by a processor for generating a compensation voltage, opposite to the AC component of the voltage at the terminals of the first capacitor, and including a first terminal connected to the first capacitor and a second terminal intended to be connected to the second power supply line.

Abstract: A DC voltage conversion device comprising: first conversion means, transformation means connected to the first conversion means, and superposition and rectifying means connected to the first conversion means and to the transformation means, and supplying an output voltage comprising pulses having equal amplitudes to the sum of the amplitudes of the pulses of the primary and the secondary pulsed voltage. A converter for converting a DC voltage into AC voltage comprising the DC voltage conversion device, filtering means being connected on output of the superposition and rectifying means of said conversion device. An uninterruptible electric power supply comprising a converter for converting a DC voltage into AC voltage connected to storing means, said converter comprising the DC voltage conversion device to convert the DC voltage of said storing means.

Abstract: A DC voltage conversion device comprising: first conversion means, transformation means connected to the first conversion means, and superposition and rectifying means connected to the first conversion means and to the transformation means, and supplying an output voltage comprising pulses having equal amplitudes to the sum of the amplitudes of the pulses of the primary and the secondary pulsed voltage. A converter for converting a DC voltage into AC voltage comprising the DC voltage conversion device, filtering means being connected on output of the superposition and rectifying means of said conversion device. An uninterruptible electric power supply comprising a converter for converting a DC voltage into AC voltage connected to storing means, said converter comprising the DC voltage conversion device to convert the DC voltage of said storing means.

Abstract: The device for parallel connection of a plurality of electrical feeder units comprises a power output socket, and for each feeder unit: a connector equipped with a power input plug, and at least one power conductor between said plug and the output socket. The connector comprises detection means designed to detect connection of said connector to the feeder unit. A controlled switch equipped with a control input is connected in series on the at least one power conductor, said control input being coupled to the detection means, detection of connection of the connector to the feeder unit enabling closing of said switch.

Abstract: The filtering device comprises at least one passive filtering cell controlled by an electronic switch and a control device. Said control device receives a signal representative of an electrical quantity of an electrical distribution line for example a load current. Then a processing circuit of the control circuit extracts a signal representative of a harmonic frequency to be eliminated from said electrical quantity and controls a generator generating control signals of said switch. Said signals control closing or opening of the switch at a mean frequency appreciably equal to the frequency of the harmonic to be eliminated or attenuated.

Abstract: The AC-DC converter comprises a first rectifier circuit having a three-phase input and an output in DC. A compensating device is connected between the input and output of the first rectifier circuit to compensate the stray disturbances generated by a current flowing in said first rectifier circuit. The compensating device makes a compensation current flow between the three-phase input and the DC output. Said compensating circuit comprises a second rectifier circuit with controlled rectifiers connected to the three-phase input, a step-up circuit connected between the second rectifier circuit and the DC output, and a control circuit to control the step-up circuit and the second rectifier circuit.