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

Abstract

A method for controlling a set of reversible AC / DC or DC / DC converters (20A, 20B) arranged in parallel, comprising, prior to connecting the converters, coupling the converter to the electrical power source, followed by the implementation of an active no-load regulation phase. This active regulation phase comprises one or more iterations of the following steps: - measuring a current (Imes) at the converter output 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) of said converter, which acts on the output voltage of said converter, in particular by increasing it. Figure for the abbreviation: 2

Description

Title of the invention: METHOD AND DEVICE FOR CONTROLLING A CONVERTER BELONGING TO A SET OF CONVERTERS TECHNICAL FIELD AND PREVIOUS ART

[0001] The present 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.

[0002] The present invention relates more specifically to the balancing of reversible active converters without a communication strategy.

[0003] 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.

[0004] A converter without a communication strategy is configured to perform energy conversion without being equipped with such means or an interface to communicate with a network or other converters.

[0005] Components involved in the propulsion functions of an aircraft, but also secondary components intended to perform secondary functions such as instrumentation, wing de-icing or cabin pressurization of an aircraft, or intended to meet the needs of passengers such as lighting, are associated with electrical energy conversion devices allowing the conversion of an alternating or direct voltage (or current) into a direct voltage (or current).

[0006] It is thus known, for example, to use ATRU<®> type power converters (for "Auto Transformer Rectifier Unit" in English) configured to convert an alternating electrical voltage into a direct voltage.

[0007] 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.

[0008] Furthermore, since the generators on board the aircraft supply a three-phase alternating voltage, for example 115 volts, while the onboard computers require a DC voltage of 28 volts, for example, it may be necessary to first lower the AC voltage to 28 volts before converting it to DC voltage.

[0009] In parallel converter assemblies, balancing the voltages delivered by the converters is important. Inadequate balancing, particularly in reversible converters, can result in some converters drawing current instead of supplying it.

[0010] There are various techniques for achieving such balancing of converters connected to a load and in particular those called droop control (commonly called "droop" according to Anglo-Saxon terminology) particularly adapted to converters without means of communication.

[0011] Moreover, the balancing performance is highly dependent on the accuracy of the measurement chains of the converters, which accuracy can drift over time due in particular to the aging of the components.

[0012] Periodic calibration phases may prove necessary to correct such drifts, resulting in significant loss of time and costs.

[0013] The problem arises of finding a new method of controlling a reversible converter belonging to a set of converters in parallel and intended to be connected to the same DC load and which is in particular improved with regard to the disadvantage(s) stated above. Description of the invention

[0014] 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:

[0015] - measure a current at the output of the converter and when this output current is not zero and is in particular negative,

[0016] - generate a current limiting control signal capable of modifying a signal converter control acting on the converter's output voltage, in particular by increasing it.

[0017] With such a method, when the converters are unloaded and therefore not yet connected to a load they are intended to power, unwanted current recirculation is limited, which can damage the source(s). When the source is a battery, the current, not being regulated, can be too high and damage the battery, and if the battery is already charged, it can cause destructive overheating.

[0018] Advantageously, the method 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.

[0019] 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, in particular related to aging.

[0020] According to one embodiment, the converter control signal is established 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, and wherein the method further comprises, following the detection of a stabilized converter output voltage regulation and current limiting regime, the steps of: - detection, based on a value of the current limiting control signal, of a current limiting activation condition, and then, when said current limiting activation condition is detected, - storage of a compensation voltage value corresponding to a difference between the output voltage setpoint of said converter and the output voltage measurement of said converter.

[0021] The stored compensation voltage value allows the measurement chain to be recalibrated via an offset relative to other network equipment over time.

[0022] 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 detecting that the current limiting control signal is strictly positive, or - when the current regulator is located downstream of the voltage corrector: by detecting that the current limiting control signal is equal to the control signal.

[0023] Advantageously, the method may further comprise a step consisting of:

[0024] - comparing the compensation voltage to a threshold, then,

[0025] - when the compensation voltage reaches or exceeds the threshold, produce a signal fault indicator.

[0026] Such an indicator can make it possible to report a fault and possibly trigger a maintenance operation on the converter.

[0027] According to one possible implementation of the method, it may include, prior to the no-load start-up of the converter, the following steps:

[0028] - initialization of the compensation voltage to a zero value,

[0029] - detection of an initialization completion signal from the converter, the coupling of said converter to said electrical energy source being triggered following said detection of the end-of-initialization signal, then,

[0030] - detection of a signal requesting the start of said no-load regulation phase coming from the converter,

[0031] - coupling of said converter to said electrical energy source, the phase of no-load start being triggered following said detection of the start request signal.

[0032] 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:

[0033] - add a voltage adjustment to said voltage measurement corresponding to said compensation voltage or a compensation threshold when the compensation voltage exceeds the compensation threshold,

[0034] - measure the output current of the converter and estimate a load value as seen by the converter based on the measured output current or a power calculation performed from a measured output current,

[0035] - subtract from the voltage setpoint, a static control voltage established in based on said estimated charge value.

[0036] Typically, the method further includes, prior to connecting the converters to the load, a step of resetting the limiting module current so as to cancel the current limiting signal at the output of the current limiting module.

[0037] According to another aspect, the present application relates to a converter control device configured to implement a process as defined above.

[0038] One embodiment in particular provides for a converter control device comprising:

[0039] - a converter output voltage regulation structure, 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,

[0040] - 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 including clipping modules.

[0041] The device can also be equipped with a voltage recalibration module having 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 recalibration module being configured to produce the voltage recalibration according to the compensation signal at the input of the voltage corrector.

[0042] 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.

[0043] According to another aspect, the present invention relates to an aircraft equipped with such an electrical circuit. Brief description of the drawings

[0044] The present invention will be better understood on the basis of the following description and the accompanying drawings in which:

[0045] The present invention will be better understood upon reading the description of the exemplary embodiments given, by way of illustration only and in no way limiting, with reference to the accompanying drawings in which:

[0046] [Fig.1A] [Fig.1B] [Fig.1C] serve to illustrate a set of reversible converters intended to supply a load via a direct voltage or current.

[0047] [Fig.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 achieve balancing when the assembly is operating under load.

[0048] [Fig.3] serves to illustrate a variant of the regulation structure in which the module enabling the cancellation of current feedback during a no-load operating phase is located upstream of a voltage corrector.

[0049] [Fig.4] serves to illustrate another variant of the regulatory structure.

[0050] [Fig.5] serves to illustrate an example of a sequence of steps that may be put implemented during a no-load regulation phase of a converter belonging to said set of converters.

[0051] Identical, similar or equivalent parts of the different figures bear the same numerical references so as to facilitate the transition from one figure to another.

[0052] The different parts represented in the figures are not necessarily shown on a uniform scale, in order to make the figures more legible.

[0053] DETAILED DESCRIPTION OF SPECIFIC EMBODIMENTS

[0054] 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.

[0055] The 10A, 10B converters are intended 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.

[0056] In the illustrated embodiment, the assembly consists of two converters, but a larger number of converters in parallel can be provided.

[0057] In the illustrated embodiment, each converter is associated with its own source, but a configuration with converters in parallel sharing the same source may be a envisaged alternative.

[0058] During the start-up phase of the 20A, 20B voltage converters on a network, the converters are unloaded and are not connected to the electrical load 30.

[0059] 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.

[0060] In practice, because of the discrepancies between the measurements linked to inaccuracies in the measurement chains, the 20A converter which regulates the highest voltage is then likely to supply a current to other converters, here a current 32 to the 20B converter.

[0061] To avoid this current return 32 during a no-load operating phase (where, as in [Fig.1B], 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 [Fig.2].

[0062] Such a structure comprises a current-limiting module equipped with a regulator 110 receiving from a comparator 83 an input difference between zero and a measured current 32 (Imes) at the converter output 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 particular example of [Fig. 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.

[0063] In the case of a DC / DC converter, for example, the modulator can act 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 makes it possible to obtain 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 a phase angle.

[0064] The saturation block 140 is formed, for example, of 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 embodiment, the current limiting, and in particular the regulator 110, is downstream of a voltage regulator 120, whose output acts on the control signal S_com. The output of the voltage regulator 120 is here coupled to the saturation block 140 and in particular to the first clipping module 142. The corrector 120 can be for example a proportional integral (PI) or proportional integral delivered (PID) type corrector.

[0065] The current limiting module corrects the converter's control signal Scom 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, for example, several tens of millivolts.

[0066] 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 gives 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 measuring device 70.

[0067] 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 logic word of several bits translating different states and / or operating phases of the converter.

[0068] Learning this compensation voltage can be used to compensate for drifts related to the aging of measurement chains.

[0069] In the event of a significant value of the compensation voltage Vcomp and in particular greater than a compensation threshold, the compensation voltage can be limited to this compensation threshold.

[0070] An excessively high value of the compensation voltage Vcomp, and in particular one exceeding an alert threshold, may indicate a fault. If such a threshold is reached or exceeded, a maintenance operation may be initiated.

[0071] When the voltage compensation offset (Vcomp) from a 130 calibration module is applied after the stabilization of the regulation loops, the Current limiting can be reset so as to cancel the current limiting signal.

[0072] During operation under load (connection of the converters to the load 30) illustrated on [Fig.lC], the balancing of the output voltages of the converters is achieved using a voltage regulation allowing a static control voltage Vdroop (“droop”) to be subtracted from the setpoint Vcons.

[0073] The voltage corrector 120 receives at input a difference between a voltage setpoint Vcons corrected by the static control voltage Vdroop, and a voltage measurement Vmes output of the converter, to which is added the voltage recalibration Vcomp.

[0074] 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.

[0075] The droop control module 150 may 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).

[0076] 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).

[0077] According to another example, the regulation of the Vdroop voltage of droop control can be carried out as in the document "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).

[0078] In the example just described in connection with [Fig.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.

[0079] A variant of the regulation structure described above is shown in [Fig.3]. This variant differs from the example described above in particular in that the current limiting, and in particular the regulator 110 producing the current limiting control signal Slim_c, is now located upstream of the voltage corrector 120. The corrector 120 then directly outputs the control signal Scom of the modulator.

[0080] Another variant of the control structure is shown in [Fig. 4]. Here, the regulator 110 is still shown producing the Slim_c limiting control signal. current upstream of the voltage corrector 120. The compensation is this time applied directly to the voltage measurement. The calibration module 130 is located upstream of a comparator 103 located upstream of the voltage corrector 120 and which performs a comparison between, on the one hand, a difference between the setpoint Vcons and the control voltage Vdroop, and on the other hand, the measurement voltage Vmes at the output of the comparator to which the voltage calibration Vcomp is added.

[0081] Fig. 5 gives, 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 of 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.

[0082] Initially ([Fig.1A]), 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.

[0083] 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.

[0084] A change of state of an Econv status word consisting of several bits at the input of the recalibration module 130 then indicates the detection of a converter initialization completion signal. The converter is then coupled to its source (switches 11 closed on [Fig. 1B]) and a waiting step (SI step) for a conversion command is then performed.

[0085] This conversion command is typically detected by a new state change of the Econv status word at the input of the recalibration module 130, and it corresponds to a start request. The no-load regulation phase is triggered following the detection of the start request signal.

[0086] The converter is then started without load followed by an active no-load regulation phase (step S2).

[0087] 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.

[0088] Detection of a stabilized output voltage regulation regime of the converter and current limiting is then typically achieved by joint detection of a zero current Imes at the converter output and a maintenance of the voltage Vmes measured at the output of the converter, during a holding time, for example on the order of 100 ms.

[0089] Next, we check (step S3) whether the converter is the one imposing its voltage on the others or whether it is subject to current limiting. This detects a current limiting activation condition. Such detection is performed using the Slim_c current limiting control signal.

[0090] 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.

[0091] When, alternatively, as in [Fig.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.

[0092] When the stabilized current limiting activation condition is detected, the current value of compensation Vcomp in voltage which allowed the cancellation of a return current can then be stored (step S31).

[0093] 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 continuous 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 capable of being connected and, on the other hand, said continuous 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 includes one or more iterations of the following steps: - measuring a current (Imes) at the output of the converter and, - when 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) of said converter acting on the output voltage of said converter, in particular by increasing it.

2. A control method according to claim 1, further comprising, at the end of said one or more iterations, a step of detecting a stabilized output voltage regulation regime 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.

3. A control method according to claim 2, wherein the control signal (Scom) of said converter is established 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 converter output voltage and a measurement (Vmes) of converter output voltage, and wherein the method further comprises, following said detection of the end of stabilized operation and prior to connecting said converters of said assembly to said load, the steps of: - detecting, from a value of the current limiting control signal (Slim_c), a current limiting activation condition, then, when said current limiting activation condition is detected, - storing 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.

4. A control method according to claim 3, 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).

5. A control method according to any one of claims 3 or 4, further comprising steps of: - comparing the compensation voltage (Vcomp) to a threshold, then, - when the compensation voltage reaches or exceeds said threshold, producing a fault indicator signal, in particular capable of triggering a maintenance operation of said converter.

6. A control method according to any one of claims 3 to 5, further comprising, prior to the no-load start-up of the converter, the steps of: - initializing the compensation voltage to zero, - detecting an end-of-initialization signal from the converter, coupling said converter to said respective electrical power source being triggered following said detection of the end-of-initialization signal, and 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.

7. A control method according to any one of claims 3 to 6, further comprising, after said no-load active regulation phase and said step of detecting a stabilized output voltage regulation regime of the converter and current limiting, 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 input a difference between a setpoint (Vcons) of the converter output voltage and a measurement (Vmes) of the converter output voltage,The active load regulation phase includes one or more iterations of the following steps: - adding 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, - measuring the current (Imes) at the converter output and estimating 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), - subtracting from the voltage setpoint (Vcons) a static control voltage (Vdroop) established as a function of said estimated load value.

8. A control method according to claim 7, further comprising, after said no-load active regulation phase and said step of detecting 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.

9. A control device for a converter in a set of converters connected in parallel and configured to implement a method according to any one of the preceding claims, the device comprising: - a converter output voltage regulation structure, the device being equipped with a voltage corrector (120) receiving a difference between a setpoint (Vcons) of converter output voltage and a measurement (Vmes) of converter output voltage 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) suitable for 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).

10. Control device according to claim 9, 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 state 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.

11. An 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 9 or 10.

12. Aircraft comprising an electrical circuit according to claim 11.