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elec. puissance

Controlling a power converter for an automatic search of the maximum power yradateur. Wednesday, June 27, – 2: Reactive Power compensators and Voltage Unbalance compensators. The invention applies in particular to the control of heaters. Single phase dimmer shown in the drawing is for controlling power supplied to a resistor R of purely resistive type, for example a heating resistor.

elec. puissance

The single-phase voltage Vr across the resistor R is shown in Figure 7. It is a 32MVA substation connected to a 90kV transmission line.

Firstly, the French railways system is introduced and the interest in installing power electronic compensators in substations is highlighted. Static power supply device of an electrofilter for electrostatic dust precipitation.

Two types of devices are implemented today on the French Railway Network: Giuliano Raimondo 1 AuthorId: Numerical simulations using real current and voltage waveforms are presented. Monday, March 26, – 3: Furthermore, if a single-phase dimmer has no practical interest and control of the thyristor gates of a three phase dimmer, from a trigger omnophase as the falling edge of Vmem, is also perfectly known. Means for temperaturabhaengigen electronic power control gradxteur fan motors for alternating current, in particular for heating and air conditioning.


Matériels d’instrumentation, régulateur, nouveaux produits

The manuscript is developed through three main parts: Le manuscrit contient trois parties principales: In the second part, the use of CCI structures in reactive power compensation is investigated.

Inductive proximity detector fitted with an oscillating circuit exhibiting relaxation. On-board electric vehicle battery charger drawing sinusoidal monophas at unity power factor – uses high frequency converter with pulse width modulation to switch rectifier-transformer primary circuit.

Regulating the power delivered into resistive loads powered with alternating current is conventionally effected by means of dimmers single or three phase, generally constituted according to the distribution of the phases, by a parallel thyristors mounted head to tail or a combination thyristors and diodes.

This thesis presents an investigation into new topologies based on the concept of “Chopper Controlled Monophsse CCI. In the last part, the problem of voltage unbalance is treated. Method and device for supplying a resistance electrical appliance with alternating current through selected alternations.

Based on the step-down or step-up functioning mode of CCIs, two topologies of reactive power compensator are presented.

The converter design is developed gradzteur the base of a measurement campaign carried out at the substation. Triac firing control circuit for inductive loads – uses supply and anode voltage sensing to control short gate pulses after zero crossings of voltages for low energy firing.


The present invention relates to a method of controlling a dimmer for resistive loads. The switching device – e.

In early ages, due to its very simple diagram, there was no necessity to integrate power electronics in substations. Device for control of electromagnetic unit s with rapid action, such as electrovalve s or injector s.

Matériels d’instrumentation

It is equipped by a 60MVA single phase transformer with the primary side connected to a kV transmission line. However, for the last decade, the interest in power electronic equipments raised since they can provide the solution for network optimization when traffic increases or when a difficulty is foreseen for a substation implementation.

Method and apparatus for controlling a-c power by means of thyristors for a resistance-type electric furnace. This latter voltage is used to develop, in a control circuit 4, a pulse control signal Vcom FIG.

Each such termination generates gate pulses iG,iG’causing one complete mains voltage cycle to be gradafeur to the load.