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.
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.
Alstom | Date: 2017-04-26
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).
Alstom | Date: 2017-05-03
A transition tower section is described. The transition section extends from an upper end having a polygonal cross-section of X sides to a lower end having a polygonal cross-section of Y sides, wherein X is different from Y. A wind turbine tower and a wind turbine comprising such a transition tower section, and a method for constructing such wind turbine towers or tower portions are also described.
Alstom | Date: 2017-05-10
The present invention relates to a system for monitoring a pantograph of a railway vehicle (1), the pantograph being adapted to be connected to a catenary (8) and electrically connected to a traction unit (14), the catenary being adapted to provide an alternating current to the railway vehicle, the system further comprising: a voltage step detection device (26, 28, 66) for detecting a voltage step of a pantograph voltage at the pantograph, a zero crossing detection device (42, 60, 66, 82) for detecting a zero crossing of a line current, the line current (I_(L)) being a portion of a pantograph current (I) provided to the traction unit (14), the pantograph current being the current flowing through the pantograph; and a bouncing detection portion (72) adapted to determine at least one bouncing time of the pantograph (6) based on one or more detected voltage steps of the voltage step detection device and/or one or more detected zero crossings of the zero crossing detection device.
Alstom | Date: 2017-05-17
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).
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.
Alstom and Neratec Solutions AG | Date: 2017-05-31
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.
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.
Agency: European Commission | Branch: H2020 | Program: IA | Phase: LCE-05-2015 | Award Amount: 51.69M | Year: 2016
In order to unlock the full potential of Europes offshore resources, network infrastructure is urgently required, linking off-shore wind parks and on-shore grids in different countries. HVDC technology is envisaged but the deployment of meshed HVDC offshore grids is currently hindered by the high cost of converter technology, lack of experience with protection systems and fault clearance components and immature international regulations and financial instruments. PROMOTioN will overcome these barriers by development and demonstration of three key technologies, a regulatory and financial framework and an offshore grid deployment plan for 2020 and beyond. A first key technology is presented by Diode Rectifier offshore converter. This concept is ground breaking as it challenges the need for complex, bulky and expensive converters, reducing significantly investment and maintenance cost and increasing availability. A fully rated compact diode rectifier converter will be connected to an existing wind farm. The second key technology is an HVDC grid protection system which will be developed and demonstrated utilising multi-vendor methods within the full scale Multi-Terminal Test Environment. The multi-vendor approach will allow DC grid protection to become a plug-and-play solution. The third technology pathway will first time demonstrate performance of existing HVDC circuit breaker prototypes to provide confidence and demonstrate technology readiness of this crucial network component. The additional pathway will develop the international regulatory and financial framework, essential for funding, deployment and operation of meshed offshore HVDC grids. With 35 partners PROMOTioN is ambitious in its scope and advances crucial HVDC grid technologies from medium to high TRL. Consortium includes all major HVDC and wind turbine manufacturers, TSOs linked to the North Sea, offshore wind developers, leading academia and consulting companies.
Agency: European Commission | Branch: H2020 | Program: IA | Phase: LCE-02-2016 | Award Amount: 22.78M | Year: 2017
Five DSOs (CEZ distribuce, ERDF, EON, Enexis, Avacon) associated with power system manufacturers, electricity retailers and power system experts, propose a set of six demonstrations for 12 to 24 months. Within three years, they aim at validating the enabling role of DSOs in calling for flexibility sources according to local, time-varying merit orders. Demonstrations are designed to run 18 separate use cases involving one or several of the levers increasing the local energy system flexibility: energy storage technologies (electricity, heat, cold), demand response schemes with two coupling of networks (electricity and gas, electricity and heat/cold), the integration of grid users owning electric vehicles, and the further automation of grid operations including contributions of micro-grids. The use cases are clustered into three groups. Three use cases in Sweden and the Czech Republic address the enhancement of the distribution network flexibility itself. Five use cases in France, Germany and Sweden demonstrate the role of IT solutions to increase drastically the speed of automation of the distribution networks, which can then make the best use of either local single or aggregated flexibilities. Ten use cases in Czech Republic, France, The Netherlands and Sweden combine an increased network automation and an increased level of aggregation to validate the plausibility of local flexibility markets where both distributed generation and controllable loads can be valued. Replicability of the results is studied by the DSOs and industry with an in-depth analysis of the interchangeability and interoperability of the tested critical technology components. Dissemination targeting the European DSOs and all the stakeholders of the electricity value chain will be addressed by deployment roadmaps for the most promising use cases, thus nourishing the preparation of the practical implementation of the future electricity market design, the draft of which is expected by end of 2016.