Levallois - Perret, France
Levallois - Perret, France

Alstom is a French multinational company which holds interests in the electricity generation and rail transport markets. According to the company website, in 2012–2013 Alstom had annual sales of €20.3 billion, and employed approximately 96,000 people in around 100 countries. Alstom's headquarters are located in Levallois-Perret, west of Paris. Its CEO is Patrick Kron.Alstom is active in the fields of electrical generation and transmission, with products including turbines for hydroelectric, gas, coal and nuclear-powered plants, as well as large-scale electrical grid infrastructure, solar-thermal, and geothermal systems. It is also a major rail vehicle manufacturer, active in the fields of passenger transportation, signalling and locomotives, with products including the AGV, TGV, Eurostar, and Pendolino high-speed trains, in addition to suburban, regional and metro trains, and Citadis trams.Alstom was formed from a merger between Compagnie Française Thomson Houston and the Société Alsacienne de Constructions Mécaniques in 1928; significant acquisitions included the Constructions Electriques de France , shipbuilder Chantiers de l'Atlantique , and parts of ACEC SA . A merger with parts of the General Electric Company plc formed GEC-Alstom in 1989; the company became Alstom in 1998.In 2004, Alstom was in financial crisis due to massive inherited unexpected costs arising from a design flaw inherited from the acquisition of ABB Group's turbine business, in addition to losses in other areas of the business. The company required a €3.2 billion state-backed bailout in 2003 – and as a result was required to sell several divisions including shipbuilding and electrical transmission to comply with EU rules on state aid.In 2014, Alstom and General Electric announced that a US$17 billion bid for the company's power and grid divisions had been made and provisionally accepted. The proposed takeover became a political issue, with the French state intervening, enacting a decree, nicknamed décret Alstom, giving the French state additional powers to veto foreign takeovers. GE's bid was later modified, matching elements of a rival offer from Siemens and Mitsubishi Heavy Industries – with proposals to form 50:50 joint ventures in several divisions; the modified bid was also accepted by Alstom's board – at the same time the French state took a 20% stake in the company from Bouygues in order to protect its position. The GE acquisition deal for the power and grid division is expected to be finalized by early 2015. Wikipedia.

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The invention concerns a current interrupter chamber (1) for a medium or high voltage circuit breaker extending along a longitudinal axis (XX) and comprising: - a pair of arcing contacts (4, 5), at least one of which (5) is movable along the longitudinal axis (XX ), - an arc blowing nozzle (6), - a blowing chamber (7) of which the volume V2 is fixed and that opens inside the blowing nozzle, - a compression chamber (8), arranged substantially behind the blowing chamber, and means (73, 81) for making the inner volume of said compression chamber (8) and that of the blowing chamber (7) communicate, - means (14, 15, 50), disposed substantially behind the compression chamber (8), for supplying a liquid, either in the compression chamber (8), or directly in the blowing chamber (7).


A railway train comprising a driving carriage, a driven carriage, an automatic coupling assembly coupling the driving carriage to the driven carriage and a train control system for controlling the operation of the railway train, wherein the train control system includes a coupling remote control adapted to remotely control the locking and unlocking of the automatic coupling assembly and thus the coupling and uncoupling of the driving carriage to the driven carriage, a train end detection device adapted to detect the end of a railway train, and a traction cut-out controlling device (124) adapted to automatically cut-out the traction of the driving carriage upon uncoupling of the driving carriage from the driven carriage by the coupling remote control, and to automatically remove the traction cut-out upon detection, by the train end detection device, of an end of the driving carriage as the end of a new railway train.


The present invention generally relates to hydraulic machinery, such as hydraulic turbines. More specifically, the invention is directed to optimising power consumption when the turbine is used in condenser mode. The present invention provides a novel hydraulic installation where the reduction of pressure in the spiral case during condenser mode operations is more efficient, limiting the power consumption if compared to state-of-the-art installations.


Patent
Alstom | Date: 2017-01-25

Methods are provided of operating first and second wind turbines in a situation wherein presence of the first wind turbine affects the wind so that a wake is generated that affects the second wind turbine. These methods comprise determining parameters of the wind at first wind turbine and at second wind turbine. These methods further comprise determining a value of a parameter of a previously determined wake model to determine an current wake model. This value is determined based on the parameters of the wind at first wind turbine and at second wind turbine. These methods still further comprise optimizing the operation of the first and second wind turbines based on the current wake model. Control systems are also provided which are suitable for performing any of said methods of operating wind turbines. Wind farms are also provided comprising any of said control systems.


Patent
Alstom | Date: 2017-03-29

The present invention generally relates to hydro turbine. The runner unit according to the present invention allows adjusting the gap clearance downstream and between the runner end tip portion and the inner edge of the blades. This gap clearance may depend on the angular position of the runner blades.


Patent
Alstom | Date: 2017-04-05

A method of de-icing blades of a wind turbine comprising a first step of de-icing a blade, a second step of testing whether there is a mass imbalance in the rotor or not and a last step of de-icing other blades of the rotor when a mass imbalance is detected. Also wind turbines suitable for carrying out such methods are disclosed.


The present invention relates to a method for controlling an electric vehicle (1), in particular a railway vehicle, having a three phase electric machine (7) for accelerating and/or decelerating the vehicle, the three phase electric machine includes a stator and a rotor, the method comprising the following steps: determining a current (I1) of a first phase of the three phase electric machine, determining a current (I2) of a second phase of the three phase electric machine, determining the angular position (p) of the rotor, and determining an estimated torque of the three phase electric machine based on the current of the first phase, the current of the second phase and the angular position of the rotor,controlling the electric vehicle based on the estimated torque..


Patent
Alstom, Danobat and Charles III University of Madrid | Date: 2017-03-01

The present invention relates to a method and system for automatically detecting faults in a rotating shaft. The invention comprises the steps of: acquiring a vibration signal from the rotating shaft by means of at least one sensor; processing the signal acquired by the sensor in the time domain and in the frequency domain by means of a processor, obtaining energy measurements of the acquired signal as a result of said processing; comparing in the processor the energy measurements with previously established energy patterns; and finally determining if there is any fault in the rotating shaft based on the comparison between the energy measurements and the previously established patterns.


A calibration block (10) and method of making the same are disclosed. The block (10) includes a substrate (12) having a base material (14) with first (16a) and second (16b) opposite sides; a bond layer (18) and a thermal barrier layer (19) coated on the first side (16a) of the base material (14). The block (10) further includes artificial defects (30) configured in the substrate (12) in the form of holes (32) and notches (34). The holes (32) on the base material (14) extend from the second side (16b) to the first side (16a), excluding the bond and thermal corrosion coated layers (18), (19). At least some of the holes (32) are adapted to incorporate screws or gel (36) therein protruding above a height of the substrate (12) to form the notches (34). Furthermore, at least some of the holes (32) are adapted to incorporate a cut portion (22) of original defects of the components (20) therein to replicate original defects on the substrate (12).


This method (100) comprises a step (130) of transmitting an authentication key to at least one communication module among a first and a second communication modules, the transmission being performed by a symmetric data encryption communication between a key server and said communication module, using a transportation key known by said communication module, The method further comprises a preliminary step (120) of transmitting the transportation key to said communication module, the preliminary transmission being performed by an asymmetric data encryption communication between the key server and said communication module using a public key generated by said communication module.

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