Abstract: Control method for an electronic DC/AC converter (1), wherein for at least one phase: calculating a first reference voltage (er,v, es,v, et,v) from predefined voltage setpoints (22) and a phase voltage (Vcr, Vcs, Vct); calculating a second reference voltage (er,ipos, es,ipos, et,ipos) based on a difference between a predefined upper current limit (lmax) and the current (ir, is, it) of said at least one phase, and on the phase voltage; calculating a third reference voltage (er,ineg, es,ineg, et,ineg) based on a difference between a predefined lower current limit (?lmax) and the current of said at least one phase, and on the phase voltage; comparing the first reference voltage (er,v, es,v, et,v) with the second reference voltage (er,ipos, es,ipos, et,ipos) selecting the lowest voltage of the two; comparing the selected reference voltage with the third reference voltage (er,ineg, es,ineg, et,ineg) selecting as the control voltage (er,s, es,s, et,s) the highest of the two; and applying the selected control voltag

Abstract: The present invention relates to a method for controlling power ramps with prediction in intermittent power generation plants, such as, for example, a photovoltaic solar plant, which minimizes the storage capacity required for compliance with the maximum ramp requirements for power fluctuation as well as the cycling of said storage systems, thus extending its lifespan and also reducing associated energy losses, thus reducing investment costs in the plant, such that, in order to achieve the same maximum fluctuation ramp, a minor use is made of the energy storage system.

Abstract: The present invention relates to a method for controlling power ramps with prediction in intermittent power generation plants, such as, for example, a photovoltaic solar plant, which minimizes the storage capacity required for compliance with the maximum ramp requirements for power fluctuation as well as the cycling of said storage systems, thus extending its lifespan and also reducing associated energy losses, thus reducing investment costs in the plant, such that, in order to achieve the same maximum fluctuation ramp, a minor use is made of the energy storage system.

Abstract: The present invention is a method for the control of power ramp-rates minimizing energy storage requirements in intermittent power generation plants, such as for example a photovoltaic solar plant, which minimizes the energy storage requirements approximately halving the size of storage systems necessary to comply with a maximum allowable ramp-rate given by a grid code regulation regarding the state of the art, reducing thus investment costs in the plant and/or carrying out a rationalized use of the energy storage system, in such a way that in order to achieve the same maximum fluctuation ramp, a minor use is done of the energy storage system, minimizing the losses and extending its working life, and therefore reducing the plant operational costs.

Abstract: The invention falls within the technical field associated with methods for controlling power fluctuation ramps using energy storage systems in plants for intermittent energy generation, wherein said method reduces the size of the energy storage system necessary to fulfill the requirement of a maximum power fluctuation ramp, by means of a step of imposing a maximum power variation ramp by imposing the dynamic component of the ramp, defined as the gradient according to which the power of the plant is varied in each control cycle in accordance with the state of charge of the energy storage system (SOC).

Abstract: The invention falls within the technical field associated with methods for controlling power fluctuation ramps using energy storage systems in plants for intermittent energy generation, wherein said method reduces the size of the energy storage system necessary to fulfill the requirement of a maximum power fluctuation ramp, by means of a step of imposing a maximum power variation ramp by imposing the dynamic component of the ramp, defined as the gradient according to which the power of the plant is varied in each control cycle in accordance with the state of charge of the energy storage system (SOC).

Abstract: The present invention is a method for the control of power ramp-rates minimizing energy storage requirements in intermittent power generation plants, such as for example a photovoltaic solar plant, which minimizes the energy storage requirements approximately halving the size of storage systems necessary to comply with a maximum allowable ramp-rate given by a grid code regulation regarding the state of the art, reducing thus investment costs in the plant and/or carrying out a rationalized use of the energy storage system, in such a way that in order to achieve the same maximum fluctuation ramp, a minor use is done of the energy storage system, minimizing the losses and extending its working life, and therefore reducing the plant operational costs.

Abstract: It stands out mainly for consisting of a nested configuration of electrolysis units (5), independently operated, the nominal power values of which are descendant in such a manner that, for any unit of the system, the sum of the nominal power of the smaller electrolysis units (5) is always greater than or equal to the “dead band” (DB) of said units, allowing reduction of the dead band of said hydrogen production system (4) to negligible levels, avoiding loss or discharge of the energy generated in said renewable power stations, preferably one or several wind farms (2) formed by a group of wind turbines (1), connected to the power grid (3) as a consequence of the implementation of a primary control service therein or, in general, of any other active power control service, thereby optimizing the total energy obtained.

Abstract: A process for simultaneously providing capacity sale services (e.g. frequency regulation or voltage regulation), energy sale services (energy transfer from off-peak hours to peak hours), and stabilization services of a renewable plant may be provided. The process includes determining the values of energy quantity to be produced by the plant during a near future time interval. The process may also include introducing the values of energy quantity, in the control unit. Generating an hourly program of energy supply to be provided by the energy accumulator unit to the network may also be performed, depending on the values of energy to be produced, which stabilizes the power supplied by the plant to the network. Furthermore, the frequency and the voltage of the network may be regulated as well as transfers the energy between off-peak hours and peak hours, or from hours with saturation of the network to hours without saturation.

Abstract: The invention relates to a control method applicable to structures for converting direct current/alternating current, dc/ac, especially for photovoltaic systems. The control method according to the invention enables the switching losses of the semiconductors to be reduced, thereby improving the efficiency of the conversion structure. The invention can also be applied to other fields of energy, such as the generation of energy by means of electrochemical cells or wind energy.

Abstract: The invention controls the network frequency via an active power reserve obtained by interacting in a coordinated manner with the speed regulation that acts on the power generated or on the pitch angle, to guarantee primary or secondary regulation across the whole range of wind speed.

Abstract: The present invention relates to a method and system for controlling a wind power installation connected to an electrical power grid, in case of a fault in said grid. In the electrical machines that form part of the wind power installation, generators and transformers, it is possible to change the impedance of the neutral closure introducing a plurality of active and passive elements. This limits the currents during the grid fault, thereby reducing the peak torque in the mechanical train of the wind turbines and allows guaranteeing compliance with the network connection requirements, as control of the active and reactive currents is maintained at all times.

Abstract: It stands out mainly for consisting of a nested configuration of electrolysis units (5), independently operated, the power output values of which are descendant in such a manner that, for any unit of the system, the sum of the power output values of the smaller electrolysis units (5) is always greater than or equal to the “dead band” (DB) of said units, allowing reduction of the dead band of said hydrogen production system (4) to negligible levels, avoiding loss or discharge of the energy generated in said renewable power stations, preferably one or several wind farms (2) formed by a group of wind turbines (1), connected to the power grid (3) as a consequence of the implementation of a primary control service therein or, in general, of any other active power control service, thereby optimising the total energy obtained.

Abstract: A power-management system and method for photovoltaic installations connecting to the grid incorporates monitoring active and/or reactive power, account being taken at all times of grid requirements, in order to allow temporary demand arising in the grid to be addressed, thereby contributing to regulation of the grid and to the stability and quality thereof.

Abstract: The subject matter of the invention is the provision of a power-management system and method for photovoltaic installations connecting to the grid, which incorporates monitoring active and/or reactive power, account being taken at all times of grid requirements, in order to allow temporary demand arising in the grid to be addressed, thereby contributing to regulation of the grid and to the stability and quality thereof.

Abstract: The invention relates to a control method applicable to structures for converting direct current/alternating current, dc/ac, especially for photovoltaic systems. The control method according to the invention enables the switching losses of the semiconductors to be reduced, thereby improving the efficiency of the conversion structure. The invention can also be applied to other fields of energy, such as the generation of energy by means of electrochemical cells or wind energy.

Abstract: The present invention relates to a method and system for controlling a wind power installation connected to an electrical power grid, in case of a fault in said grid. In the electrical machines that form part of the wind power installation, generators and transformers, it is possible to change the impedance of the neutral closure introducing a plurality of active and passive elements. This limits the currents during the grid fault, thereby reducing the peak torque in the mechanical train of the wind turbines and allows guaranteeing compliance with the network connection requirements, as control of the active and reactive currents is maintained at all times.

Abstract: The invention controls the network frequency via an active power reserve obtained by interacting in a coordinated manner with the speed regulation that acts on the power generated or on the pitch angle, to guarantee primary or secondary regulation across the whole range of wind speed.

Abstract: The invention relates to a DC/AC conversion structure, preferably intended for photovoltaic systems, having a high yield across the entire input voltage range thereof, thereby guaranteeing that direct current is not injected into the alternating current network. In a preferred embodiment, the circuit includes six switching elements (T1 to T6) controlled by a command unit. In addition, the circuit includes a capacitive divider (C4 and C5) having the negative of the photovoltaic field connected to one of the ends thereof and a network terminal connected at the mid-point of same, which minimises problems of electromagnetic compatibility.

Abstract: A theft protection device for photovoltaic solar panels is provided. The device includes of at least one cable which is made to pass through the solar panels. The cable can be fibre optic or electrical, and a light beam or an electrical current, respectively, is made to circulate through the cable. At the ends of the cable, an electrical control circuit is connected, capable of detecting a cut in the cable caused by the interruption of the light beam in the fibre or a voltage drop at the ends of the electrical cable. Cutting of the cable for theft of the solar panels is detected by the control circuit which activates an alarm, acoustic and/or visual, which can belong to the device or be remote.