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 invention relates to a conversion system (100) with a DC side and an AC side, and to an associated control method. The system (100) comprises a primary conversion block (1), a secondary conversion block (2) and a transformer block (3) with at least one primary winding (3.1) connected to the primary conversion block (1) and a secondary winding (3.2R, 3.2S, 3.2T) for each phase (R, S, T) which are connected to the secondary conversion block (2). Each conversion block (1, 2) comprises a plurality of controllable switches, and the system (100) comprises a controller (4) communicated with said switches and configured for causing the opening and closing of said switches in a controlled and coordinated manner.

Abstract: Power conversion systems and an associated control methods are disclosed. The system includes a plurality of converters connected in parallel on an AC side, each converter includes an AC side for being coupled to a power grid, a DC side for being coupled to a DC source, and a first terminal and a second terminal on said DC side. The outputs on the AC side of all the converters are connected to a common output point, the first terminals of the different converters of the system being grounded, and the second terminals of said converters being independent to one another. Each source is therefore adapted and configured to work independently of the rest of the sources.

Abstract: The invention relates to a conversion system (100) with a DC side and an AC side, and to an associated control method. The system (100) comprises a primary conversion block (1), a secondary conversion block (2) and a transformer block (3) with at least one primary winding (3.1) connected to the primary conversion block (1) and a secondary winding (3.2R, 3.2S, 3.2T) for each phase (R, S, T) which are connected to the secondary conversion block (2). Each conversion block (1, 2) comprises a plurality of controllable switches, and the system (100) comprises a controller (4) communicated with said switches and configured for causing the opening and closing of said switches in a controlled and coordinated manner.

Abstract: Power conversion systems and an associated control methods are disclosed. The system includes a plurality of converters connected in parallel on an AC side, each converter includes an AC side for being coupled to a power grid, a DC side for being coupled to a DC source, and a first terminal and a second terminal on said DC side. The outputs on the AC side of all the converters are connected to a common output point, the first terminals of the different converters of the system being grounded, and the second terminals of said converters being independent to one another. Each source is therefore adapted and configured to work independently of the rest of the sources.

Abstract: The object of the invention is to provide a power supply system and method for the various elements forming DC/AC electronic power converters that assures the operation of the converters during normal operating conditions and anomalous operating conditions, being specially designed for photovoltaic systems connected to the power grid and capable of providing direct current and alternating current voltages at the output thereof from at least one DC power source (1) and at least one AC power source (2), which basically comprises an output for DC loads (6) connected to the output of a DC/DC converter (3) the input of which is connected to the DC power source (1), an AC output for critical loads (7) connected to a first selector (5) configured for alternating between a first position where said AC output for critical loads (7) is connected to the output of a first DC/AC converter (4) the input of which is connected to the DC power source (1), and a second position where said AC output for critical loads (7) is co

Abstract: Verifying system and method for verifying the disconnecting means of a DC/AC converter which are connected in series through a midpoint in each phase between the converter and a power grid. The system comprises voltage detectors and a control unit in communication with said detectors and configured for determining the status of the disconnecting means depending on said voltages. The detectors comprise a detector associated with each phase for measuring the voltages between the corresponding midpoint and the neutral of the power grid, and an additional detector for measuring the voltage between said neutral and a reference point of the converter.

Abstract: The present invention relates to a control system and control method for controlling a switching device (1) integrated in an electronic converter, the object of which is to extend the working voltage range of the switching devices and thus increase the power of the electronic DC/AC converter which prepares the energy produced by a energy generating system and injects it into the electrical grid. It basically comprises a voltage source (3), a capacitance (7), a first gate resistor (21) and a second gate resistor (22), a first circuit formed by a series resistor (6) with a first diode (5), a second circuit formed by a second diode (4) and a connecting element (8) controlled by a control unit (12) that controls the opening and closing thereof. Another object of the present invention is a switching cell for an electronic converter comprising said control system.

Abstract: The present invention relates to a control system and control method for controlling a switching device (1) integrated in an electronic converter, the object of which is to extend the working voltage range of the switching devices and thus increase the power of the electronic DC/AC converter which prepares the energy produced by a energy generating system and injects it into the electrical grid. It basically comprises a voltage source (3), a capacitance (7), a first gate resistor (21) and a second gate resistor (22), a first circuit formed by a series resistor (6) with a first diode (5), a second circuit formed by a second diode (4) and a connecting element (8) controlled by a control unit (12) that controls the opening and closing thereof. Another object of the present invention is a switching cell for an electronic converter comprising said control system.

Abstract: The object of the invention is to provide a power supply system and method for the various elements forming DC/AC electronic power converters that assures the operation of the converters during normal operating conditions and anomalous operating conditions, being specially designed for photovoltaic systems connected to the power grid and capable of providing direct current and alternating current voltages at the output thereof from at least one DC power source (1) and at least one AC power source (2), which basically comprises an output for DC loads (6) connected to the output of a DC/DC converter (3) the input of which is connected to the DC power source (1), an AC output for critical loads (7) connected to a first selector (5) configured for alternating between a first position where said AC output for critical loads (7) is connected to the output of a first DC/AC converter (4) the input of which is connected to the DC power source (1), and a second position where said AC output for critical loads (7) is co

Abstract: Electric circuit for converting direct into alternating current specially designed for photovoltaic systems connected to the electrical grid without a transformer, and enabling the earthing of one of the input terminals (2) of the photovoltaic generator, thereby working with a wide range of input voltages and having a high efficiency.

Abstract: The object of the invention is to provide an energy management system for variable resource energy generating systems, which incorporates means for the storing of energy and the management thereof. The system permits the needs which arise in the power grid to be met, and participates in the regulation of the power grid and contributing to the stability and quality thereof.

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: Electric circuit for converting direct into alternating current specially designed for photovoltaic systems connected to the electrical grid without a transformer, and enabling the earthing of one of the input terminals (2) of the photovoltaic generator, thereby working with a wide range of input voltages and having a high efficiency.

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 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: The invention presents a structure for the conversion of direct current electric power into alternating current electric power, characterised in that it is simple, highly efficient and minimises the problem of electromagnetic compatibility. The circuit includes, in its first preferred embodiment, six switching elements governed by a command unit, four switches forming an H-bridge (T1, T2, T3, T4) and two auxiliary switches (T5D, T6D), and two auxiliary diodes (Daux1 and Daux2). The elements of the H-bridge switch at grid frequency, whereas T5D and T6D switch at high frequency by means of pulse width modulation (PWM), or other appropriate modulation techniques. The voltage of these auxiliary switching elements (T5D, T6D) is limited topologically to half the direct current input voltage (Vin), thereby reducing switching losses and resulting in a high performance converter.