Stage Ingénieur TCSC Control H/F Job In EUROPE-France-Île-de-France-Massy

The use of FACTS opens up new perspectives for more effective exploitation of power networks with continuous and rapid action on the various parameters of the network, namely phase shifting, voltage, and impedance, see [4]. Power transfers are thus controlled, and voltage levels maintained, to the best advantage, which enables the margins of stability and level maintenance to be increased with a view to making use of the power lines by transferring the maximum current, at the limit of the thermal strength of these lines, at high and very high voltages.

FACTS can be classified in two families, namely parallel FACTS and series FACTS. Parallel FACTS comprise, in particular, the mechanical switched capacitor (MSC), the static Var compensator (SVC), and the static synchronous compensator (STATCOM). Series FACTS consist, in particular of the fixed capacitor (FC), the thyristor switch series capacitor (TSSC), the thyristor control series capacitor (TCSC), and the static synchronous series compensator (SSSC). The most elementary form of series FACTS device consists of a simple capacitor (FC) connected in series on the transmission line. This capacitor partly compensates for the inductance of the line. The improvement made by the series compensation can be clearly seen. In this regard, the amount of compensation acts directly on the value of maximum power. Thus, the greater the amount of compensation applied, the greater the amount of power that can be transmitted, or the smaller the transmission angle for a given amount of power to be carried. In addition, the increase in the amount of power that can be transmitted enables the overall stability of the network to be improved in the event of a transient fault in the power transmission line, by producing an increase in the margin of stability (i.e. the margin of active power which is available before reaching the angle that is critical to stability). However, the association of capacitors having a fixed and constant capacitance with the inductance of the transport line constitutes a resonant system with little damping. In some particular circumstances, especially on returning to normal operation following a fault on the transmission line, this resonant system can go into oscillation through an exchange of energy with the resonant mechanical system consisting of the masses and the shafts of the turbines of the turbo alternators. This energy exchange phenomenon which is also known as sub-synchronous resonance (SSR), gives rise to oscillations of power (and therefore of electromagnetic torque) of high amplitude, which can sometimes give rise to fracture of the mechanical shafts in the rotating parts of the generators. In order to damp out these power oscillations, it is accordingly possible to make use of a controllable series capacitor (CSC) for artificially damping the oscillations by active control of the inserted capacitive reactance (and therefore of impedance). Equipment suitable for damping out power oscillations makes use of thyristors to control this reactance. The most commonly used apparatus is the thyristor controlled series capacitor (TCSC), which offers a good solution to the problems of stability in networks, and the best compromise between economic and technical criteria.

Skills:

Electrotechnical Engineering / Power Electronics / Automatic control /FACTS

Matlab/Simulink

What we offer:

A demanding and rewarding training period (for last year engineering school or master) in an international organization, which will allow you to further develop your skills while contributing to ambitious and innovative projects.

Period:

Mission to start ASAP, for 6 months minimum.