Method and device for controlling a converter belonging to a set of converters

Abstract

The invention relates to a method for controlling a set of reversible AC / DC or DC / DC converters (20A, 20B) arranged in parallel, which method comprises, prior to connecting the converters, coupling the converter to the electrical power source, then implementing an active vacuum regulation phase, the active regulation phase comprising one or more iterations of the following steps: - measuring a current (Imes) at the output of the converter and, as long as this output current is not zero and is in particular negative, - generating a current-limiting control signal (Slim_c) capable of modifying a control signal (Scom) for the converter acting on, and in particular increasing, the output voltage of the converter.

Description

[0001] METHOD AND DEVICE FOR CONTROLLING A CONVERTER BELONGING TO A SET OF CONVERTERS

[0002] DESCRIPTION

[0003] TECHNICAL FIELD AND PREVIOUS ART

[0004] This application relates to the field of reversible energy converters enabling the conversion of electrical energy, alternating or direct, into direct electrical energy, and relates more particularly to the parallel connection of converters without a communication strategy, to provide direct electrical energy to at least one load, in particular a load of a means of transport such as an aircraft, for example an airplane or a helicopter.

[0005] The present invention relates more specifically to the balancing of reversible active converters without a communication strategy.

[0006] A converter with a communication strategy is configured to perform energy conversion but also to operate within a connected system in which it is likely to exchange information with other elements such as a network or other equipment or other converters via wired or wireless means of communication, in order to achieve optimized energy management.

[0007] A converter without a communication strategy is configured to perform energy conversion without having such means or an interface to communicate with a network or other converters.

[0008] Components involved in an aircraft's propulsion functions, as well as secondary components designed to perform secondary functions such as instrumentation, wing de-icing, or cabin pressurization, or to meet passenger needs such as lighting, are associated with electrical power conversion devices that convert alternating or direct current (AC or DC) voltage into direct current (DC). For example, it is common to use ATRU<®> (Auto Transformer Rectifier Unit) type power converters configured to convert AC voltage into DC voltage.

[0009] There are static converters of the chopper type capable of modifying the level of a DC voltage according to the power supply requirements of the secondary component.

[0010] Furthermore, since the generators on board the aircraft provide a three-phase alternating voltage, for example 115 volts, while the computers on board require to be powered by a direct voltage, for example 28 volts, it may be necessary to first lower the alternating voltage to 28 volts before converting it to direct voltage.

[0011] In parallel converter systems, balancing the voltages they deliver is crucial. Poor balancing, particularly in reversible converters, can result in some converters drawing current instead of supplying it.

[0012] There are various techniques for achieving such balancing of converters connected to a load, including those known as droop control (commonly called "drop" according to Anglo-Saxon terminology), which are particularly suited to converters without means of communication.

[0013] Furthermore, balancing performance is highly dependent on the accuracy of the converter measurement chains, which accuracy can drift over time due in particular to component aging.

[0014] Periodic calibration phases may be necessary to correct such deviations, resulting in significant loss of time and costs.

[0015] The problem arises of finding a new method for controlling a reversible converter belonging to a set of parallel converters intended to be connected to the same DC load, and which is particularly improved with regard to the drawback(s) stated above. DESCRIPTION OF THE INVENTION

[0016] It is therefore an object of the present invention to provide a method for controlling a converter belonging to a set of AC / DC or DC / DC converters, reversible and arranged in parallel, the converters of the set being intended to be connected to the same DC load, each of the converters being configured to perform energy adaptation between, on the one hand, an electrical energy source, alternating or direct, and, on the other hand, the DC load, the method comprising coupling each of the converters to its respective electrical energy source, then a no-load start-up phase and the implementation of an active no-load regulation phase, the active no-load regulation phase comprising one or more iterations of the following steps:

[0017] - measure the current at the converter's output, and when this output current is not zero, and in particular is negative,

[0018] - generate a current limiting control signal capable of modifying a converter control signal acting on the converter output voltage in particular by increasing it.

[0019] With this method, when the converters are unloaded and therefore not yet connected to a load they are supposed to power, unwanted current recirculation is limited, which can damage the power source(s). When the power source is a battery, the current is not regulated, and it can either be too high and damage the battery, or, if the battery is already charged, it can cause destructive overheating.

[0020] Advantageously, the process may further include, at the end of one or more iterations, a step of detecting a stabilized regime of output voltage regulation of the converter and current limiting, following a joint detection, in particular during a holding time, of a zero current at the output of said converter and a zero voltage gradient at the output of said converter.

[0021] Following such detection of a stabilized regime, the regulation, when implemented, produces a compensation voltage to compensate for any drifts in the voltage measurement chain of the converter, particularly those related to aging.

[0022] According to one possible implementation, the converter control signal is established by means of a converter output voltage regulation structure comprising a voltage corrector receiving at input a difference between a converter output voltage setpoint and a converter output voltage measurement and wherein the method further comprises, following the detection of a stabilized converter output voltage regulation and current limiting regime, the steps of: detecting, from a value of the current limiting control signal, a current limiting activation condition, and then, when said current limiting activation condition is detected, storing a compensation voltage value corresponding to a difference between the converter output voltage setpoint and the converter output voltage measurement.

[0023] The stored compensation voltage value allows the measurement chain to be recalibrated via an offset relative to other network equipment over time.

[0024] Recording the compensation voltage after each detection of a stabilized operating condition can help detect anomalies. Storing a history of compensation voltages allows for the identification of deviations and, if necessary, the proactive planning of preventive converter maintenance.

[0025] Advantageously, the current limiting control signal is produced by a current regulator receiving a difference between a zero value and a measurement of the current at the output of the converter, the current limiting activation condition being detected: when the current regulator is located upstream of the voltage corrector: by detection that the current limiting control signal is strictly positive, or when the current regulator is located downstream of the voltage corrector: by detection that the current limiting control signal is equal to the control signal.

[0026] Advantageously, the process may further include a step consisting of:

[0027] - compare the compensation voltage to a threshold, then,

[0028] - when the compensation voltage reaches or exceeds the threshold, produce a fault indicator signal.

[0029] Such an indicator can help to identify a fault and possibly trigger a maintenance operation on the converter.

[0030] Depending on one possible implementation of the process, it may include, prior to the no-load start-up of the converter, the following steps:

[0031] - initialization of the compensation voltage to a zero value,

[0032] - detection of an initialization completion signal from the converter, the coupling of said converter to said electrical power source being triggered following said detection of the initialization completion signal, then,

[0033] - detection of a signal requesting the start of said no-load regulation phase from the converter,

[0034] - coupling of said converter to said electrical energy source, the no-load start-up phase being triggered following said detection of the start request signal.

[0035] After the no-load active regulation phase, the control method may advantageously include connecting the converters to the DC load, the method then further comprising an active on-load regulation phase of the converter by means of a converter output voltage regulation structure comprising a voltage corrector receiving at its input a difference between a converter output voltage setpoint and a converter output voltage measurement, the active on-load regulation phase comprising one or more iterations of the following steps: - adding a voltage recalibration to said voltage measurement corresponding to said compensation voltage or to a compensation threshold when the compensation voltage exceeds the compensation threshold,

[0036] - measure the output current of the converter and estimate a load value seen by the converter based on the measured output current or a power calculation performed from a measured output current,

[0037] - subtract from the voltage setpoint, a static control voltage established as a function of said estimated load value.

[0038] Typically, the process also includes, prior to connecting the converters to the load, a step of resetting the current limiting module so as to cancel the current limiting signal at the output of the current limiting module.

[0039] In another respect, the present application relates to a converter control device configured to implement a process as defined above.

[0040] One embodiment specifically provides for a converter control device comprising:

[0041] - a structure for regulating the output voltage of the converter, the device being equipped with a voltage corrector receiving a difference between a setpoint output voltage of the converter and a measured output voltage of the converter to which a compensation voltage is added to produce a corrected signal suitable for use as a control signal for said converter,

[0042] - a current limiting module equipped with a regulator capable of receiving a difference between the zero value and the current measured at the output of said converter and configured to, when this difference is non-zero, deliver the current limiting control signal to the voltage corrector or to a saturation block comprising clipping modules.

[0043] The device can also be equipped with a voltage calibration module with a state machine receiving the control signal, the current limiting control signal, the voltage measurement at the output of the converter, the voltage setpoint, and a status word from said converter, the voltage calibration module being configured to produce the voltage calibration according to the compensation signal at the input of the voltage corrector.

[0044] According to another aspect, the present invention relates to an electrical circuit with a plurality of converters arranged in parallel and intended to perform an energy adaptation between on the one hand at least one source of electrical energy, direct or alternating and on the other hand a direct load, each converter comprising a control device as defined above.

[0045] According to another aspect, the present invention relates to an aircraft equipped with such an electrical circuit.

[0046] BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The present invention will be better understood on the basis of the following description and the accompanying drawings, in which:

[0048] The present invention will be better understood upon reading the description of the given exemplary embodiments, provided for illustrative purposes only and in no way limiting the application, with reference to the accompanying drawings in which:

[0049] Figures 1A-1C serve to illustrate a set of reversible converters intended to supply a load via a DC voltage or current.

[0050] Figure 2 serves to illustrate an example of a regulation structure that can be integrated into a converter of said assembly to enable it to cancel current feedback when the assembly is operating at no load and to perform balancing when the assembly is operating under load.

[0051] Figure 3 serves to illustrate a variant of the regulation structure in which the module for canceling current feedback during a no-load operating phase is located upstream of a voltage corrector.

[0052] Figure 4 serves to illustrate another variant of the regulatory structure.

[0053] Figure 5 illustrates an example of a sequence of steps that may be implemented during a no-load control phase of a converter belonging to the converter set. Identical, similar, or equivalent parts of the different figures carry the same numerical references to facilitate transitions between figures.

[0054] The different parts represented in the figures are not necessarily shown on a uniform scale, in order to make the figures more legible.

[0055] DETAILED DESCRIPTION OF SPECIFIC METHODS OF IMPLEMENTATION

[0056] In order to power one or more components of an aircraft, it is proposed to use reversible 20A, 20B converters as schematically illustrated in figures 1A-1C intended to adapt an electrical voltage source, direct (DC) or alternating (AC), to the needs of the component(s) to be supplied with electrical energy symbolized here by a load 30.

[0057] The 10A, 10B converters are designed to each receive an input voltage from, here respectively, 10A, 10B sources of alternating or direct electrical voltage and each deliver a 22A, 22B continuous (DC) output voltage to the load 30.

[0058] In the illustrated example, the assembly consists of two converters, but a larger number of converters in parallel can be used.

[0059] In the illustrated implementation example, each converter is associated with its own source, but a configuration with converters in parallel sharing the same source may be a planned alternative.

[0060] During the start-up phase of 20A, 20B voltage converters on a network, the converters are unloaded and not connected to the electrical load 30.

[0061] The respective voltage regulation loops of the 20A, 20B converters seek to impose a voltage on the network, for example of the order of 28 volts.

[0062] In practice, because of discrepancies between measurements due to inaccuracies in measurement chains, the 20A converter which regulates the highest voltage is then likely to supply a current to other converters, here a current of 32 to the 20B converter.

[0063] To avoid this current return 32 during a no-load operating phase (where, as in Figure IB, the converters are unloaded and not connected to the electrical load 30) and to be able to cancel it, each converter 20A, 20B can be associated with a regulation structure such as illustrated for example in Figure 2.

[0064] Such a structure comprises a current-limiting module equipped with a regulator 110 that receives from a comparator 83 an input difference between zero and a measured current 32 (Imes) at the converter output, obtained from a current-measuring means 80, for example, equipped with a current sensor. The regulator 110 may, for example, include a proportional-integral (PI) or proportional-integral-output (PID) controller. When the measured current Imes is negative, a current-limiting control signal Slim_c is generated at the output of the regulator 110 and, in the specific example of Figure 2, at the input of a saturation block 140 that delivers a control signal S_com to a modulator (not shown).The modulator is a power electronic circuit that controls the conversion of electrical energy from one voltage level to another and which, for example, implements a pulse width modulation (PWM) process or another form of control that determines how a power electronics stage (not shown) of the converter, typically made up of transistors, for example of MOSFETs or IGBTs type, turns on and off to regulate the output voltage of the converter.

[0065] In the case of a DC / DC converter, for example, the modulator can operate by switching the power electronics stage to create an average voltage that is proportional to the duration of the generated pulses relative to the total switching period. This allows for an adjustable output voltage by modifying the duty cycle of the pulses. In the case of an AC / DC converter, the modulator can be used, for example, to control the phase angle.

[0066] The saturation block 140 is formed, for example, by a first clipping module 142 using a "Max" function, which outputs the input with the maximum value, and a second clipping module 144 using a "Min" function, which outputs the input with the minimum value. The second clipping module 144 has an input set to a control signal threshold com_MAX. In this example, the current limiting, and in particular the regulator 110, is downstream of a voltage controller 120, whose output acts on the control signal S_com. The output of the voltage controller 120 is coupled to the saturation block 140, and in particular to the first clipping module 142. The controller 120 can be, for example, a proportional-integral (PI) or proportional-integral-delivered (PID) controller.

[0067] The current limiting module corrects the converter's Scom control signal when it draws current (negative current) until the output current becomes zero instead of negative. For example, if converter 20B draws current, the regulation described above tends to increase the output voltage of converter 20B. After the current limiting loop stabilizes, converter 20A imposes its voltage, and converter 20B is current-limited to achieve a zero output current. This current limiting increases the output voltage of converter 20B. In an example where the setpoint voltage is around 28V, the increase could be several tens of millivolts.

[0068] After current limiting convergence, when converter 20B has a zero output current and converters 20A and 20B have their output voltages 22A and 22B stabilized, the voltage difference between a setpoint output voltage Vcons and a measured output voltage Vmes provides a compensation voltage value Vcomp to be applied to cancel the feedback current, and which can be stored. A measurement of the converter's output voltage Vmes is performed using a voltage measurement device.

[0069] The memorization is carried out in a tangible and non-transient memory such as, for example, a ROM (“Read-Only Memory”), a RAM (“Random Access Memory”), an EEPROM (“Electrically Erasable Programmable Read-Only Memory”), a Flash memory, Cache memory, NVRAM (“Non-Volatile Random Access Memory”).

[0070] The compensation voltage is delivered here by a calibration module equipped with logic, in particular a state machine, which receives as input signals the voltage Vmes measured at the output of the converter, the setpoint voltage Vcons, the current limiting signal Slim_c, the control signal, and a status signal, for example in the form of a multi-bit logic word translating different states and / or operating phases of the converter.

[0071] Learning this compensation voltage can be used to compensate for drifts related to the aging of measurement chains.

[0072] In the event of a significant value of the compensation voltage Vcomp, and in particular one exceeding a compensation threshold, the compensation voltage can be limited to this compensation threshold.

[0073] An excessively high value for the compensation voltage (Vcomp), particularly one exceeding a warning threshold, can indicate a malfunction. If such a threshold is reached or exceeded, a maintenance operation can be initiated.

[0074] When the voltage compensation offset Vcomp from a 130 recalibration module is applied after the stabilization of the regulation loops, the current limitation can be reset so as to cancel the current limiting signal.

[0075] During operation under load (connection of the converters to the load 30) illustrated in figure IC, the balancing of the output voltages of the converters is achieved using a voltage regulation which subtracts from the setpoint Vcons, a static control voltage Vdroop (“droop”).

[0076] The 120 voltage corrector receives at input a difference between a Vcons voltage setpoint corrected by the Vdroop static control voltage, and a Vmes output voltage measurement from the converter, to which the Vcomp voltage recalibration is added.

[0077] A static control module 150 produces the voltage Vdroop applied to the comparator 93. The voltage Vdroop is determined using means 90 to estimate a load value seen by the converter as a function of the measured output current or a power calculation performed from an output current measurement.

[0078] The 150 droop control module can have a conventional structure or as described for example as in the document: Compensation Type Improved Droop Control Based Current Sharing Method of Parallel DC-DC Converter, by Xing et al., 2022 China Automation Congress (CAC).

[0079] According to another example, the regulation of the Vdroop voltage of droop control can be carried out as in the document "Magnification of Performance Operation for "Low Voltage DC Microgrids Based on Adaptive Droop Control Technique", 2021, Ghalib et al., 22nd International Middle East Power Systems Conference (MEPCON).

[0080] According to another example, the regulation of the Vdroop voltage of droop control can be carried out as in the paper "A Low-pass Filter Method to Suppress the Voltage Variations Caused by Introducing Droop Control in DC Microgrids", Li et al., 2018 IEEE Energy Conversion Congress and Exposition (ECCE).

[0081] In the example just described in connection with Figure 2, the current limiting module equipped with the regulator 110 and used mainly during the active no-load regulation phase, is located upstream of the voltage corrector 120.

[0082] A variant of the regulation structure described previously is given in Figure 3. This variant differs from the example described previously in that the current limiting and in particular the regulator 110 producing the Slim_c current limiting control signal is this time upstream of the voltage corrector 120. The corrector 120 then delivers the Scom control signal of the modulator directly at the output.

[0083] Another variant of the control structure is shown in Figure 4. Here, the regulator 110, which produces the current-limiting control signal Slim_c, is still positioned upstream of the voltage corrector 120. The compensation is now applied directly to the voltage measurement. The calibration module 130 is located upstream of a comparator 103, which is itself upstream of the voltage corrector 120. This comparator performs a comparison between, on the one hand, the difference between the setpoint Vcons and the control voltage Vdroop, and on the other hand, the measurement voltage Vmes at the comparator output, to which the voltage calibration Vcomp is added.

[0084] Figure 5 provides, by means of a logic diagram, an example of a sequence of steps that can be implemented, using the 130 module for recalibrating a converter in a set of converters such as that illustrated in Figures 1A-1C, including the starting of the converter and an active regulation phase under load.

[0085] Initially (figure IA), the converters 20A, 20B are not coupled (switches 11 open) to their respective electrical power sources 10A, 10B and their outputs are each typically set to high impedance.

[0086] The converter and voltage compensation are then initialized to a zero value Vcomp=0 (step S0). The converter initialization may include conventional self-test and offset learning steps for the converter's current sensor.

[0087] A change of state in an Econv status word consisting of several bits at the input of the 130 recalibration module then indicates the detection of a converter initialization completion signal. The converter is then coupled to its source (switches 11 closed in Figure IB) and a waiting step (SI step) for a conversion command is then executed.

[0088] This conversion command is typically detected by a new state change of the Econv status word at the input of the 130 recalibration module, and it corresponds to a start request. The no-load regulation phase is triggered following the detection of the start request signal.

[0089] We then perform the no-load start-up of the converter followed by an active no-load regulation phase (step S2).

[0090] This active no-load regulation phase includes one or more iterations of steps consisting of: measuring the current Imes at the output of the converter and as long as this output current is not zero and is in particular negative, generating a current limiting control signal Slim_c capable of modifying the control signal Scom acting on the output voltage of the converter.

[0091] Detection of a stabilized output voltage regulation regime for the converter and current limiting is typically achieved by simultaneously detecting a zero output current (Imes) and a sustained output voltage (Vmes) for a duration, for example, approximately 100 ms. Next (step S3), it is verified whether the converter is the one imposing its voltage on the others or if it is subject to current limiting. This detects a current limiting activation condition. Such detection is performed using the current limiting control signal (Slim_c).

[0092] When, as in Figures 3 and 4, the current regulator 110 is located upstream of the voltage corrector 120, such detection can consist of identifying that the current limiting control signal Slim_c is strictly positive.

[0093] When, alternatively, as in Figure 2, the current regulator 110 is located downstream of the voltage corrector 120, it is detected that the current limiting control signal Slim_c is equal to the control signal Scom.

[0094] When the stabilized current limiting activation condition is detected, the current value of compensation Vcomp in voltage that allowed the cancellation of a return current can then be stored (step S31).

[0095] Once the no-load active regulation phase is complete, the converters can be connected to a network or load. Converter balancing is then implemented by applying the compensation voltage and using the drastic control module, which generates a drastic control voltage (Vdroop) that depends on an estimate of the load value seen by the converter.

Claims

DEMANDS 1. A method for controlling a converter belonging to a set of AC / DC or DC / DC converters (20A, 20B), reversible and arranged in parallel, said converters of said set being intended to be connected to the same DC load (30), each of said converters being configured to perform energy adaptation between, on the one hand, a respective alternating or direct electrical energy source (10A, 10B) from among one or more electrical energy sources (10A, 10B) to which said set is suitable for connection and, on the other hand, said DC load, the method comprising, prior to connecting each converter of said set to said load, coupling the converter to its respective electrical energy source, a no-load start-up phase of the converter and then implementing an active no-load regulation phase, the active no-load regulation phase comprising one or more iterations of the following steps: - measure the current (Imes) at the converter output and, - when this output current is not zero and is in particular negative, generate a current limiting control signal (Slim_c) capable of modifying a control signal (Scom) of said converter acting on the output voltage of said converter, in particular by increasing it, the control signal (Scom) of said converter being established by means of a converter output voltage regulation structure comprising a voltage corrector (120) receiving at input a difference between a setpoint (Vcons) of the converter output voltage and a measurement (Vmes) of the converter output voltage, the method further comprising, at the end of said one or more iterations, a step of detecting a stabilized regime of converter output voltage regulation and current limiting, following a joint detection, in particular during a holding time,of a zero current at the output of said converter and a zero voltage gradient at the output of said converter, and, following said detection of end of stabilized regime and prior to connecting said converters of said assembly to said load, the steps of: detection, from a value of the current limiting control signal (Slim_c), of a current limiting activation condition, then, when said current limiting activation condition is detected, storage of a compensation voltage value (Vcomp) corresponding to a difference between the output voltage setpoint of said converter and the output voltage measurement of said converter.

2. Control method according to claim 1, wherein the current limiting control signal is produced by a current regulator (110) receiving a difference between a zero value and a current measurement (Imes) at the output of the converter, the current limiting activation condition being detected: when the current regulator (110) is located upstream of the voltage corrector (120): by detecting that the current limiting control signal (Slim_c) is strictly positive, or when the current regulator (110) is located downstream of the voltage corrector (120): by detecting that the current limiting control signal (Slim_c) is equal to the control signal (Scom).

3. A control method according to claim 1 or 2, further comprising steps consisting of: - compare the compensation voltage (Vcomp) to a threshold, then, - when the compensation voltage reaches or exceeds said threshold, produce a fault indicator signal, in particular capable of triggering a maintenance operation for said converter.

4. A control method according to any one of claims 1 to 3, further comprising, prior to the no-load start-up of the converter, the following steps: - initialization of the compensation voltage to a zero value, - detection of an initialization completion signal from the converter, coupling of said converter to said respective electrical energy source being triggered following said detection of the initialization completion signal, then, - detection of a start request signal for said no-load regulation phase from the converter, the no-load start phase being triggered following said detection of the start request signal.

5. A control method according to any one of claims 1 to 4, further comprising, after said no-load active regulation phase and said step of detecting a stabilized output voltage regulation and current limiting regime of the converter, connecting said converters of said assembly to said DC load, the method further comprising an active on-load regulation phase of said converter by means of a converter output voltage regulation structure comprising a voltage corrector (120) receiving at its input a difference between a setpoint (Vcons) of the converter output voltage and a measured output voltage (Vmes) of the converter, the active on-load regulation phase comprising one or more iterations of the following steps: - add a voltage adjustment to said voltage measurement corresponding to said compensation voltage (Vcomp) or to a compensation threshold when the compensation voltage exceeds the compensation threshold, - measure the output current (Imes) of the converter and estimate a load value seen by the converter as a function of the measured output current (Imes) or a power calculation performed from a measured output current (Imes), - subtract from the voltage setpoint (Vcons) a static control voltage (Vdroop) established as a function of said estimated load value.

6. Control method according to any one of claims 1 to 5, further comprising, after said no-load active regulation phase and said step of detection of a stabilized output voltage regulation regime of the converter and current limiting and prior to connecting said converters (20A, 20B) of said assembly to said load (30), a step of resetting the current limiting module so as to cancel the current limiting signal (Slim_c) at the output of the current limiting module.

7. A control device for a converter or a set of converters connected in parallel and configured to implement a method according to one of the preceding claims, the device comprising: - a structure for regulating the output voltage of the converter, the device being equipped with a voltage corrector (120) receiving a difference between a setpoint (Vcons) of the output voltage of the converter and a measurement (Vmes) of the output voltage of the converter to which a compensation voltage (Vcomp) is added to produce a corrected signal suitable for use as a control signal (Scom) of said converter, - a current limiting module equipped with a regulator (110) capable of receiving a difference between the zero value and the current (Imes) measured at the output of said converter and configured to, when this difference is non-zero, deliver the current limiting control signal (Slim_c) to the voltage corrector (120) or to a saturation block (140) comprising clipping modules (142, 144).

8. Control device according to claim 7, comprising a voltage synchronization module (130) equipped with a state machine receiving the control signal (Scom), the current limiting control signal (Slim_c), the voltage measurement (Vmes) at the output of the converter, the voltage setpoint (Vcons), and a status word (Econv) from said converter, the voltage synchronization module (130) being configured to produce the voltage synchronization according to the compensation signal (Vcomp) at the input of the voltage corrector.

9. Electrical circuit comprising a plurality of converters arranged in parallel to achieve energy adaptation between on the one hand at least one source of electrical energy, direct or alternating, and on the other hand a direct load, each converter comprising a control device according to one of claims 7 or 8.

10. Aircraft comprising an electrical circuit according to claim 9.

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