Abstract: The present invention relates to a process for producing polymers in powder form by using laser energy. It relates also to polymers in powder form obtainable according to that process, and the use of those polymers in powder form in additive manufacturing.

Abstract: A method operates a track-bound traffic system which in a particularly efficient manner and at the same time with a comparably low degree of complexity allows the position of at least one vehicle end of a track-bound vehicle to be ascertained. For this purpose, the method is carried out such that a track-side device transmits first information which directly or indirectly characterizes the location of the track-side device and second information which directly or indirectly characterizes the travel direction of a track-bound vehicle. The first and second information is received by the track-bound vehicle at the location of the track-side device; and a position of at least one vehicle end of the track-bound vehicle is ascertained by the track-bound vehicle on the basis of the received first and second information.

Abstract: A method operates a track-bound traffic system which carries out a determination that a first track section part lying between a track-bound vehicle and a second track section is free of vehicles. A track-side device disposed in a first track section at a distance to an adjacent second track section, transmits status information which characterizes the second track section as being free of track-bound vehicles, and the transmitted status information is received by a vehicle traversing the first track section. The distance is measured such that no other track-bound vehicle fits in a first track section part lying between the track-bound vehicle and the second track section when the track-bound vehicle receives the status information, and the first track section part lying between the track-bound vehicle and the second track section is identified as being free of other track-bound vehicles by the track-bound vehicle based on the received status information.

Abstract: The present invention refers to a method for polishing polyamide objects obtained by additive manufacturing or 3D printing techniques, which comprises immersion of the polyamide object in a mixture of formic acid and dichloromethane at room temperature for a period of time comprised between 5 seconds and 6 minutes. This method allows effectively elimination or reduction of the roughness of the polyamide objects obtained by additive manufacturing or 3D printing techniques, for example, obtained by techniques such as the Selective Laser Sintering (SLS) with a simple procedure which does not require neither high temperatures nor extended treatment times. The present invention also refers to the object obtainable according to such method.

Abstract: A method and a system determine a subsequent number of guided vehicles occupying a track section of a railway network. The system has a trackside device configured for controlling and managing a movement authority of a guided vehicle for a track section and at least one neighboring trackside device. Each neighboring trackside device is configured for controlling and managing a movement authority for a directly neighboring track section. The trackside device is configured for calculating the subsequent number of guided vehicles from a number of guided vehicles occupying the track section previously determined by the trackside device and information received from each neighboring trackside device regarding a number of guided vehicles entering, from the track section. The directly neighboring track section is controlled by the neighboring trackside device and a number of guided vehicles leaving the directly neighboring track section for the track section.

Abstract: The present invention refers to a method for polishing polyamide objects obtained by additive manufacturing or 3D printing techniques, which comprises immersion of the polyamide object in a mixture of formic acid and dichloromethane at room temperature for a period of time comprised between 5 seconds and 6 minutes. This method allows effectively elimination or reduction of the roughness of the polyamide objects obtained by additive manufacturing or 3D printing techniques, for example, obtained by techniques such as the Selective Laser Sintering (SLS) with a simple procedure which does not require neither high temperatures nor extended treatment times. The present invention also refers to the object obtainable according to such method.

Abstract: A method operates a track-bound traffic system which in a particularly efficient manner and at the same time with a comparably low degree of complexity allows the position of at least one vehicle end of a track-bound vehicle to be ascertained. For this purpose, the method is carried out such that a track-side device transmits first information which directly or indirectly characterizes the location of the track-side device and second information which directly or indirectly characterizes the travel direction of a track-bound vehicle. The first and second information is received by the track-bound vehicle at the location of the track-side device; and a position of at least one vehicle end of the track-bound vehicle is ascertained by the track-bound vehicle on the basis of the received first and second information.

Abstract: A method operates a track-bound traffic system which carries out a determination that a first track section part lying between a track-bound vehicle and a second track section is free of vehicles. A track-side device disposed in a first track section at a distance to an adjacent second track section, transmits status information which characterizes the second track section as being free of track-bound vehicles, and the transmitted status information is received by a vehicle traversing the first track section. The distance is measured such that no other track-bound vehicle fits in a first track section part lying between the track-bound vehicle and the second track section when the track-bound vehicle receives the status information, and the first track section part lying between the track-bound vehicle and the second track section is identified as being free of other track-bound vehicles by the track-bound vehicle based on the received status information.

Abstract: Signal processing method for histogram generation, and corresponding device and use. The method generates the histogram from a plurality of event detectors that generate event signals as a response to external events, and are connected to a current injection module which is connected to a plurality of capacitors, wherein each histogram bin is univocally assigned to a capacitor. The method includes: during an event time interval corresponding to a bin, the event detectors generate event signals as a response to external events; the current injection module detects said event signals and, for each event signal, generates a corresponding current signal, which is injected in a capacitor assigned to said bin, and stored therein; repeating steps for each successive bin of said histogram; and reading the charge accumulated in each of said capacitors.

Abstract: A method for determining a signal aspect representing the vacant or occupied state of a track section for a rail vehicle, in particular a maintenance or construction vehicle, on a CBTC track. In this case, the rail vehicle does not have an on-board CBTC device. In order to dispense with special hardware, an app on a smartphone initiates the following steps: A) photographing of a track beacon in the direction of travel, B) determining the ID (identification signature) of the track beacon, C) transmitting of the track beacon ID to a CBTC track control center and D) receiving of the signal aspect determined by the CBTC track control center for the track section starting with the track beacon.

Abstract: A method and a system determine a subsequent number of guided vehicles occupying a track section of a railway network. The system has a trackside device configured for controlling and managing a movement authority of a guided vehicle for a track section and at least one neighboring trackside device. Each neighboring trackside device is configured for controlling and managing a movement authority for a directly neighboring track section. The trackside device is configured for calculating the subsequent number of guided vehicles from a number of guided vehicles occupying the track section previously determined by the trackside device and information received from each neighboring trackside device regarding a number of guided vehicles entering, from the track section. The directly neighboring track section is controlled by the neighboring trackside device and a number of guided vehicles leaving the directly neighboring track section for the track section.

Abstract: Signal processing method for histogram generation, and corresponding device and use. The method generates the histogram from a plurality of event detectors that generate event signals as a response to external events, and are connected to a current injection module which is connected to a plurality of capacitors, wherein each histogram bin is univocally assigned to a capacitor. The method includes: during an event time interval corresponding to a bin, the event detectors generate event signals as a response to external events; the current injection module detects said event signals and, for each event signal, generates a corresponding current signal, which is injected in a capacitor assigned to said bin, and stored therein; repeating steps for each successive bin of said histogram; and reading the charge accumulated in each of said capacitors.

Abstract: A method for determining a signal aspect representing the vacant or occupied state of a track section for a rail vehicle, in particular a maintenance or construction vehicle, on a CBTC track. In this case, the rail vehicle does not have an on-board CBTC device. In order to dispense with special hardware, an app on a smartphone initiates the following steps: A) photographing of a track beacon in the direction of travel, B) determining the ID (identification signature) of the track beacon, C) transmitting of the track beacon ID to a CBTC track control centre and D) receiving of the signal aspect determined by the CBTC track control center for the track section starting with the track beacon.

Abstract: System and method for controlling a wind farm, for wind farms comprising a plurality of wind turbines having a rotor, a generator, a control unit and connections to the mains of the wind farm, the wind turbines generating reactive power according to the instructions of the wind farm control system, the control system calculating a global reactive power demand to be produced by the whole wind farm on the basis of the voltage at the connection point or the power factor required, and the control system sending reactive power instructions to the wind turbines of the farm, the control system receiving information based on one or more parameters indicating the level of heating of the electrical components of the wind turbines, the generation of reactive power being distributed between the various wind turbines.

Abstract: Control system and method for a wind turbine generator, such wind turbine being a variable speed turbine and having a doubly fed induction generator, said control system comprising means for determining the operating temperature of the different subsystems, having the means for dividing the generation of reactive power, both inductive and capacitive, between the stator (3) and the network side converter (6), based on the criterion of keeping every subsystem operating temperature as far away as possible from its corresponding limit, the method comprising the following steps: determine the electrical elements temperature; calculate the closeness of those temperatures to each element corresponding limit temperature; and distribute the reactive power production between the stator (3) and the network side converter (6), based on the criterion of keeping every subsystem operating temperature as far as possible from its corresponding limit.

Abstract: A method for controlling a power generation plant may be provided. First, an equivalent grid voltage may be estimated based on electric magnitudes measured at a connection point of the power generation plant and an equivalent model of a power grid to which the power generation plant is connected. Then, on the basis of said estimated equivalent voltage, a command indicative of reactive power to be produced by the power generation plant may be generated.

Abstract: The present invention describes a process for controlling the active power injected into the grid by a generating plant for contributing to the stability of the power grid in the event of frequency variations where, in response to a deviation in grid frequency, each generating unit calculates an active power variation parameter generated based on a first parameter stored in said generating unit, said first parameter being representative of a respective contribution of said generating unit to a required variation in total active power of the generating plant, and where a central control unit of the generating plant connected to each generating unit updates the value of the first parameters when changes are produced therein.

Abstract: The present disclosure relates to a method for controlling a wind turbine of the type including a rotor, a generator, a frequency converter, a control unit and means for connecting to a wind farm grid, using means for receiving a local voltage reference value (VREF) and a regulator (1) which calculates the reactive power to be generated (QT) as a function of the voltage error (?V), such that it can be operated over the entire voltage range. The system also includes: at least one saturator element (2, 6, 7) in which the reactive power to be generated is limited, whereby the limits (Q—MAX, Q—MIN, QC—MAX, QC—MIN, QS—MAX, QS—MIN) are calculated dynamically as a function of the voltage, this block outputting a reference reactive power of the wind turbine (Q—REF, QC—REF, Qs—REF); and an element (3) for calculating the actual limit of the active power (PMAX) as a function of the pre-limited reactive power (Q—REF, Qs—REF) and the apparent power available at that moment.

Abstract: A wind turbine control method for dampening vibrations of a transmission system, even in the presence of voltage dips and in any event that is susceptible to reducing active current generation capacity, is provided. First, for example, an initial torque or power instruction may be calculated based on a turbine operating state. Next, a torque or power adjustment term associated with dampening vibration modes of a turbine transmission system may be calculated. Then, a final torque or power instruction may be calculated by, for example, applying the adjustment term to the initial instruction. Finally, the final torque or power instruction may be transformed into a current instruction for controlling the wind turbine.

Abstract: Wind farm, of the kind that comprises a series of wind turbine generators, which consist of a rotor, a generator, a control unit and means of connection to the computing network for the wind farm of which they form part, in such a way that at least two of the wind turbine generators in the farm can assume a leader hierarchy for the wind farm, accessing the operating data of the rest of the wind turbine generators, calculating and sending instructions to the rest of the wind turbine generators making up that wind farm, and a subject hierarchy, receiving and following the instructions coming from the leader wind turbine generator of the wind farm.