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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Patent
Alstom | Date: 2017-05-03

In a first aspect, a method is provided of tightening a bolt in a bolted connection between an outer ring of a pitch bearing and a hub or a blade of a wind turbine. The pitch bearing is comprised in a pitch system configured to rotate the blade along a longitudinal axis of the blade. The method comprises mounting a fixed support on the hub or the blade or the outer ring of the pitch bearing, and mounting an automatic tightening tool to the fixed support. The method further comprises positioning the supported automatic tightening tool and the bolt relative to each other in a tightening position of the bolt, and automatically tightening (or tensioning) the bolt by the positioned automatic tightening tool. In a second aspect, a system configured to perform such a method is also provided.


In the field of differential protection schemes for electrical power systems there is a need to employ a synchronization technique to enable time alignment of local terminal current with received current from a remote terminal in order reliably to operate the differential protection scheme. A method of determining a communication time delay (14_(R1), 14_(R2), 14_(R3), 14_(R4), 14_(R5)) in a communication network between a local terminal (L) and each of a plurality of remote terminals (R1, R2, R3, R4, R5) in a multi-terminal multi-junction electrical power system (10) comprises the steps of:(a) calculating a respective initial communication time delay (Tp1, Tp2, Tp3, Tp4, Tp5) between each remote terminal (R1, R2, R3, R4, R5) and the local terminal (L);(b) calculating a respective junction time delay (T_(12), T_(23), T_(34)) between respective first, second and third pairs (16, 18, 20) of adjacent junctions (J1, J2, J3, J4); and(c) correcting the calculated initial communication time delay (Tp1, Tp2, Tp3, Tp4, Tp5) of each remote terminal (R1, R2, R3, R4, R5) spaced from the local terminal (L) by two or more junctions (J1, J2, J3, J4) according to each corresponding junction time delay (T_(12), T_(23), T_(34)) arising between the or each said remote terminal (R1, R2, R3, R4, R5) and the local terminal (L).


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).


Patent
Alstom | Date: 2017-05-24

Methods of joining plates at an angle in between them are described. The method comprises providing a first and second plates having opposed top and bottom surfaces, a first side-edge, and a second side-edge opposite to the first side-edge, removing material the first and second plates to obtain a first adapted weld region having an inclined portion and a straight first side-edge and an adapted weld region of the second plate comprising a first inclined portion. The method further comprise, providing the first plate in a substantially horizontal position such that the straight first side-edge 131 is substantially vertical, providing the second plate in an inclined position with respect to the first plate such that the first inclined portion 211 of the second plate substantially abuts the straight first side-edge 131 of the first plate, and welding together the first and second plates. Wind turbine towers and tower sections are also described.


The floating structure for offshore wind turbine applications comprises a hull having an immersed section defining at least one interior space therein which is at least partially filled by a foam material having gradually varying characteristics such as foam density (F), compressive strength (F_(C)) and reduction of buoyancy (RB) according to a hydrostatic pressure (HP) acting on the hull at given depths. The hull immersed section may have a number of interior spaces arranged in levels contained within different planes.


The invention relates to a device for detecting a partial discharge from high-voltage gas-insulated equipment, the device being attached, outside the high-voltage equipment, onto a surface of an electrically-insulating part (1) that retains a high-voltage bar inside the high-voltage equipment, said surface defining, at the surface of the high-voltage equipment, a rotationally symmetrical cylinder, characterized in that it includes: an electrically conductive strip (2) attached onto a surface of a strip (6) of electrically insulating material, the electrically conductive strip being wound so as to only contact all or part of said surface; and an electrical-shielding (5) part attached onto the high-voltage equipment and positioned above the strip (6) of electrically insulating material.


The invention relates to electrical equipment (10) for a medium, high, or very high voltage power transmission line, comprising: a metal vessel (12); at least one conductor (14) arranged inside the vessel (12) and extending parallel to a main axis of the vessel (12); a medium (16) made from an insulating material, which lies in a plane that is radial relative to said main axis of the vessel (12), and which is connected to the conductor (14) as well as to the vessel (12); and studs (20) for connecting the medium (16) to the vessel (12), which are mounted onto the vessel (12), characterized in that each stud (20) is radially mounted through an associated opening (26) of the vessel (12) that opens radially toward the outside, and comprises an inner radial end (22) that engages with the medium (16).


The invention relates to a device for detecting a partial discharge from high-voltage gas-insulated equipment, the device including at least one antenna (A) arranged outside the high-voltage gas-insulated equipment and opposite a hatch (H) of the high-voltage gas-insulated equipment, characterized in that it also includes a metal flange (B) which is placed in electrical contact with a metal wall (1a, 1b) of the high-voltage equipment, and which forms, together with said wall, a Faraday cage that electrically insulates the antenna from the outside of the high-voltage equipment, the metal flange (B) having a concave wall opposite the hatch (H).


Method for providing access to a telecommunication network (3) of a wireless user station (6) through a network wireless access point (2), including:- deriving, by each of the wireless user station and the wireless network access point, a second key (OPSK) from at least a shared first key (PSK);- performing an authenticating step between wireless user station and the network wireless access point as a function of the derived second keys (OPSK);- obtaining and wirelessly transmitting by the network access point an updated value of a parameter ;- wirelessly receiving by the wireless user station the transmitted updated value of the parameter;the second key (OPSK) being derived by the wireless user station from the first shared key and further from the received updated value of the parameter, and the second key being derived by the network wireless access point from the first shared key and further from the transmitted updated value of the parameter.


Patent
Alstom | Date: 2017-05-31

A wind turbine generator includes a rotatable assembly comprising a first fixed part (200), a second, rotatable part (300) and a third part. The third part comprises a bearing system (420) for rotation between the first and second parts that includes inner and outer rings (430, 440) and a bearing element (450) arranged therebetween. A seal (600) is part of or attached to the second part for sealing a lubricant chamber (500) formed between the first part and the second part. At least one outlet (550) is formed in the second part for the lubricant to come out of the lubricant chamber.

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