777results about "Load balancing in dc network" patented technology

The invention discloses a micro-grid system based on a direct current bus and a control method, the micro-grid system comprises the direct current bus, an energy management unit and a plurality of power conversion modules, when the micro-grid system is in an independent adjusting mode, each power conversion module controls the direct current bus to operate according to bus operation parameters of the direct current bus; and when the micro-grid system is in a centralized regulation mode, the energy management unit issues a control instruction to coordinate the output power and / or the input power of each power conversion module. According to the technical scheme, a unified direct current bus framework is constructed, the photovoltaic energy unit, the energy storage energy unit, the commercial power energy unit, the direct current load and other loads are directly connected to the direct current bus, direct current direct supply and direct current direct charging are achieved, the energy link structure is simplified, the power conversion link is reduced, the overall energy efficiency of the system is improved, and the system cost is reduced. And the phenomena of multiple energy conversion and energy loss caused by dependence on an alternating current bus in the prior art are avoided.

The invention discloses a dynamic power distribution method and device for a direct-current micro-grid hybrid energy storage system, and relates to the technical field of electric energy storage management, and the method comprises the steps: collecting the power parameters, load demand fluctuation data and renewable energy power generation output data of each energy storage unit in the hybrid energy storage system in real time, calculating a multi-dimensional power entropy index, and calculating the power entropy index of the hybrid energy storage system; based on the indexes, power distribution weight coefficients are dynamically generated, power dynamic distribution is carried out, a charging and discharging strategy is generated, charging and discharging control of the hybrid energy storage system is executed, and power distribution is dynamically adjusted in combination with a real-time feedback mechanism. The technical problems that an existing energy storage system power distribution method lacks flexibility and cannot effectively cope with load fluctuation and unstable renewable energy sources, so that the system operation efficiency and stability are poor are solved, the charging and discharging strategy of the energy storage unit is dynamically adjusted through the multi-dimensional power entropy index and the real-time feedback mechanism, and the energy storage efficiency is improved. The technical effect of efficient and stable operation of the energy storage system is achieved.

The invention relates to the technical field of ship electric energy storage, and discloses a ship distributed electric energy storage and distribution balance control system which comprises a plurality of distributed storage units, a direct current bus, a plurality of power conversion modules and a dynamic balance control module. The dynamic balance control module is used for collecting the voltage deviation value of the direct current bus and the current response rate and the charge state parameter of each storage unit and determining a transient charge deviation compensation value, and the system determines the transient power flux of each node according to the current response rate and the charge state parameter. And dynamic linear calibration of feedback gain is realized based on the charge deviation compensation value so as to adjust the power output flow rate of each storage unit, the charge throughput of the direct current bus is balanced through real-time hedging of the surplus or deficient state of the transient charge of the bus, voltage oscillation during ship propulsion load switching is effectively inhibited, and the reliability of the ship propulsion load switching is improved. And the transient stability of the bus voltage is maintained.

The invention discloses an AC-DC hybrid microgrid power control method and system, and the method comprises the steps: measuring the operation state quantity of a system at the kth sampling moment of a current control period, and building an AC-side mathematical model of an interconnection converter according to the operation state quantity; according to the operation state quantity of the interconnected converter, judging the power transmission direction of the interconnected converter; a power prediction model is established, and active power and reactive power prediction values at the k + 1 moment are solved in combination with different switching states; calculating a power reference trajectory, and calculating a cost function value corresponding to each switching state by combining the predicted values of the active power and the reactive power; obtaining cost function values under all switching states, selecting the switching state corresponding to the minimum cost function value, and applying the switching state to the bridge arm switching control of the interconnected converter; and entering a next control period, and repeating the steps. According to the invention, bidirectional power mutual assistance between AC and DC hybrid power grids can be realized in multiple scenes of the flexible interconnection hybrid power grid, and the voltage stability is improved.

An electrolyser plant (1A) is described. The electrolyser plant (1A) includes a first DC link (8) with at least one DC link capacitor (C1) and an AC / DC power converter (6). An electrolyser (10) is electrically connected to the first DC link (8) and adapted to receive a load current. During normal operation of the AC power network (2), a controller (12) is adapted to maintain a pre-event DC link voltage and supply a pre-event load current to the electrolyser (10). In response to a detected low voltage event, the controller (12) is adapted to: (a) initially supply the pre-event load current to the electrolyser (10) to maintain normal operation of the electrolyser (10), (b) monitor the DC link voltage, e.g., the voltage in the first DC link (8), and (c) if the monitored DC link voltage falls below a first voltage threshold that is less than the pre-event DC link voltage, reduce the load current supplied to the electrolyser (10), optionally by ramping down the load current at a suitable ramp rate.

The invention provides a voltage fluctuation suppression method and device for a subway direct-current power supply system, and the method comprises the steps: obtaining the voltage amplitude change information of the subway direct-current power supply system at different sampling moments, and determining a real-time voltage fluctuation sequence and the operation state characteristics of each power supply node according to the voltage amplitude change information; space-time correlation mapping processing is carried out on the real-time voltage fluctuation sequence and the operation state features, a fluctuation correlation feature set is generated, and the fluctuation correlation feature set comprises voltage fluctuation space-time propagation path features and inter-node coupling influence features; calling a pre-trained fluctuation suppression decision model to perform dynamic suppression strategy generation processing on the fluctuation association feature set to obtain a voltage regulation parameter sequence for each power supply node; according to the voltage regulation parameter sequence and the operation state characteristics of the power supply nodes, generating a node-coordinated fluctuation suppression execution instruction set; and according to the fluctuation suppression execution instruction set, triggering voltage regulation operation of each power supply node to suppress voltage fluctuation.

The invention discloses a wind-solar-storage integrated direct-current micro-grid device and a control method, and relates to the technical field of rural distributed energy. The device comprises a perovskite photovoltaic module array, a vertical axis fan set, a lithium iron phosphate energy storage module, a direct-current power distribution unit, an intelligent control module and a household direct-current terminal, each energy unit and a load are directly connected through a direct current bus, AC / DC conversion loss is reduced, the intelligent control module dynamically adjusts a wind-solar-storage cooperative operation strategy based on illumination, wind speed and electrical load data, and the functions of five-hour stable off-grid power supply and peak-valley arbitrage are achieved. The method adapts to a rural farm house roof resource concentration scene, solves the problems of high loss and poor off-grid stability of a traditional alternating current micro-grid, remarkably improves the energy utilization efficiency, reduces the electricity utilization cost of farmers, and can be widely applied to energy transformation projects in rural areas such as coastal areas.

The invention discloses a dynamic power management method for an all-electric ship hybrid energy storage system. The method comprises the following steps: S1, establishing a direct-current voltage dynamic model and a ship hybrid energy storage system model based on a ship micro-grid structure of a ship; s2, establishing a multi-working-condition propulsion power model based on the movement mechanism of the ship; s3, establishing a joint SOC-SOP estimation model based on the nonlinear relationship among the state of charge, the battery power characteristics and the ambient temperature; s4, on the basis of the direct-current voltage dynamic model, the ship hybrid energy storage system model and the multi-working-condition propulsion power model, establishing a dynamic power distribution model; and S5, estimating an available power range of the battery through a combined SOC-SOP estimation model, inputting the available power range into the dynamic power distribution model, obtaining a dynamic power distribution strategy, and realizing dynamic power distribution of the ship hybrid energy storage system. According to the method, the dynamic power management of the hybrid energy storage system of the all-electric ship under the uncertain navigation condition is optimized, and the stability and the economical efficiency of a ship power system are improved.

A packet energy transfer (PET) receiver comprising receiver front-end circuitry including an input, an output, and at least one switch connected at the output. There is receiver output control and conditioning circuity including an input and an output to be connected to an electrical load. There is a synchronizer circuit to close the switch to allow power to flow into the receiver output control and conditioning circuitry during each of the first plurality of transfer periods of the transmitter and to open the switch to prevent power to flow into the receiver output circuitry during a first plurality of sample periods. There is a load controller that disables the synchronizer circuit and operates the switch to close it and allow power to flow into the receiver output control and conditioning circuitry during subsequent transfer periods and to open the switch to prevent power to flow during a subsequent sample periods.

The invention discloses a light-diesel hybrid energy storage system and a control method thereof, and belongs to the field of microgrids. The system comprises a photovoltaic power generation unit, a diesel generator set, a hybrid energy storage unit (a storage battery and a super capacitor), an AC / DC bus, a bidirectional AC / DC converter and a system controller. The controller executes hybrid energy storage frequency division control (without sampling load power and distributing power through bus voltage), V / f control and nine multi-mode energy management strategies, and monitors parameters such as photovoltaic output, load power, energy storage charge state and the like in real time to realize intelligent mode switching. The super capacitor preferentially responds to the pulse load, and the voltage fluctuation ratio is smaller than or equal to 5%; the service life of the storage battery is prolonged in combination with energy storage charge state threshold management; photovoltaic maximum utilization enables the system efficiency to be greater than or equal to 90%, and the diesel oil consumption is obviously reduced. The method is suitable for power grid coverage difficulty scenes such as off-network communication base stations, remote sentries and emergency power supply stations, and has high reliability and maneuverability.

The present application discloses a power supply and backup network of a communication device. The network includes a medium-low voltage power distribution system, a high voltage battery backup power system, a power distribution system, and a high-voltage direct-current (HVDC) bus system, where the medium-low voltage power distribution system is connected to the power distribution system by the HVDC bus system; the high-voltage battery backup power system is bypassed on the HVDC bus system; the medium-low voltage power distribution system is configured to provide HVDC power for the power distribution system by the HVDC bus system by using input mains power and oil energy backup power; the high-voltage battery backup power system is configured to provide HVDC backup power for the power distribution system by the HVDC bus system; and the power distribution system is configured to distribute, to a connected electrical device, the HVDC power.

The method is applied to the fields of train regenerative braking energy utilization, stray current and rail potential treatment and the like in electrified rail transit, especially urban rail transit. The invention provides a direct-current traction power supply system capable of reducing the energy storage capacity of a super capacitor of urban rail transit, which is combined with a super capacitor energy storage device of the urban rail transit and supplies power to a power electronic device for treating stray current and rail potential by utilizing regenerative braking energy of a train. The super-capacitor energy storage device has the following advantages that on one hand, the energy storage capacity of the super-capacitor bank in the super-capacitor energy storage device between train braking and traction can be reduced, and the utilization efficiency of regenerative braking energy stored by the super-capacitor bank is improved; on the other hand, the problems of stray current, rail potential and the like in the system can be solved from the source, and the power supply distance of a traction substation is remarkably increased. Therefore, the direct-current traction power supply system is of great significance to green and safe operation of urban rail transit.

A locomotive comprises a DC power bus, traction motors, batteries, and a charging source, but has no prime mover engine. Each traction motor includes armature and field windings connected in parallel across the DC power bus. The batteries provide power to the DC power bus when in a motoring mode, and receive power from the DC power bus when in a charging mode and a dynamic braking mode. The charging source is connected across the DC power bus to provide charging power to the batteries when in the charging mode. The traction motors also provide charging power to the batteries when in the dynamic braking mode. The power from the charging source is less than the power that would be provided by a prime mover engine. The charging source provides no power to the traction motors when in the charging mode.

The invention relates to the technical field of power systems, and discloses a self-adaptive equalization control method, system and device for the state of charge of energy storage units of an optical storage direct current micro-grid and a medium, and the method comprises the steps: building a system model comprising a photovoltaic power generation assembly and a plurality of parallel energy storage units, constructing a droop control coefficient adjustment mechanism associated with the state of charge of each energy storage unit, and realizing dynamic nonlinear adjustment of the control coefficient along with the state of charge; meanwhile, a bus voltage secondary compensation mechanism based on the average value of the output voltage of the energy storage unit and a current balance adjustment mechanism based on the virtual voltage drop difference are constructed; and overlapping the two types of compensation quantities to a voltage control instruction of each energy storage unit, and synchronously realizing the voltage stabilization of the direct-current bus and the rapid equalization of the charge states of the energy storage units. Manual intervention is not needed, uneven power distribution caused by line impedance difference or operation condition change is effectively restrained, the system reliability can be improved, and the energy storage service life can be prolonged.

The invention belongs to the technical field of electricity-hydrogen coupling system control, and provides a voltage-air pressure stability control method and system for an electricity-hydrogen coupling system. The voltage-air pressure stability control method for the electricity-hydrogen coupling system comprises the steps that a battery energy storage system serves as an execution unit, and a voltage regulation model is constructed based on the dynamic relation between voltage and current; a solid hydrogen storage system is used as an object, and an air pressure adjusting model is constructed based on the relation between flow and pressure; constructing a hydrogen production / hydrogen consumption model based on hydrogen production / hydrogen consumption behaviors of the electrolytic cell and the fuel cell; on the basis of real-time sharing of state variables of an electricity-hydrogen coupling system, charging and discharging of a battery energy storage system in a millisecond period are adjusted according to a voltage adjusting model, so that rapid and stable control over the voltage of a direct-current bus is achieved. And regulating and controlling the hydrogen charging and discharging flow of the solid hydrogen storage system in a second-level time scale according to the air pressure regulation model to ensure the stable pressure of the buffer tank and continuous hydrogen supply, regulating the electrolysis and fuel cell power according to the hydrogen production / consumption model to ensure the balance of energy supply and demand, and finally realizing the voltage-air pressure stability coordinated regulation and control between the electric domain and the hydrogen domain.

The invention discloses a distributed energy storage system multi-scene cooperative control method based on fault location and dynamic communication repair. The method mainly comprises a fault location module, a communication repair module, a communication module, an SOC equalization module, a current sharing control module, a voltage recovery module and a voltage and current double-closed-loop module. The fault positioning module is used for accurately identifying and positioning the fault energy storage unit; self-adaptive matching of a communication network and a system control topology is realized through the communication repairing module; through the communication module, the adjacent energy storage units exchange information, so that the system SOC and the control state quantity average value can be obtained. Through the SOC equalization module, the current sharing control module and the voltage recovery module, SOC equalization of each unit and equal-proportion distribution of output current according to capacity can be realized without sampling the output current, the bus voltage is maintained at a rated value, multiple scenes such as system starting, steady-state operation and fault recovery are adapted, and stable, efficient and cooperative operation of the distributed energy storage system is realized.

The application provides a voltage fluctuation suppression method and device for a subway direct-current power supply system, comprising: obtaining voltage amplitude change information of the subway direct-current power supply system at different sampling moments, determining a real-time voltage fluctuation sequence and an operating state feature of each power supply node according to the voltage amplitude change information; performing space-time correlation mapping processing on the real-time voltage fluctuation sequence and the operating state feature to generate a fluctuation correlation feature set, wherein the fluctuation correlation feature set comprises a space-time propagation path feature of voltage fluctuation and a coupling influence feature between nodes; calling a pre-trained fluctuation suppression decision model to perform dynamic suppression strategy generation processing on the fluctuation correlation feature set to obtain a voltage regulation parameter sequence for each power supply node; generating a node-coordinated fluctuation suppression execution instruction set according to the voltage regulation parameter sequence and the operating state feature of each power supply node; and triggering voltage regulation operations of each power supply node according to the fluctuation suppression execution instruction set to suppress voltage fluctuation.

Provided herein is a power distribution system comprising a feedback circuit including a transistor in series with a relay, the feedback circuit regulating regulate a main power path including a main power supply connected in series with an electric power converter. The power distribution system further comprises OR-ing controllers that regulate the main power path and a backup power path including a low-voltage battery. The power distribution system further comprises terminals through which power from the main power path or the backup power path is transmitted to respective components corresponding to channels. The power distribution system further includes a microcontroller that acquires data in each of the channels and control operations associated with each of the channels based on the acquired data.

The invention relates to a capacity optimization configuration method of a'light-storage 'multi-energy complementary micro-grid system. The method comprises the following steps: step 1, constructing a'light-storage' multi-energy complementary micro-grid system model: establishing a hybrid energy storage system composed of a storage battery and a super capacitor; 2, establishing an objective function: establishing the objective function by taking the lowest life cycle cost of the equipment as an objective; 3, constraint condition establishment: considering operation characteristics of a light-storage multi-energy complementary system and a management strategy of an energy storage system, and establishing constraint conditions; 4, double-layer optimization planning configuration is carried out, wherein multi-objective optimization is adopted, and optimal configuration is carried out on the capacity of the light-storage multi-energy complementary micro-grid system; 5, example analysis is carried out; the method has the advantages of a hybrid energy storage system, multi-objective optimization and double-layer optimization planning.

The invention discloses a box-type transformer light storage integrated micro-grid system and method based on an intelligent fusion terminal. The system is characterized in that a photovoltaic power generation module is connected to a direct current side through a DC / DC converter; the energy storage module is connected to the direct current side through the bidirectional converter; the electric energy quality management module comprises a parallel converter and a series converter and is connected between a direct current side and an alternating current power grid side; the isolated island operation module is connected to an AC power grid side; the feeder protection module is connected to an alternating-current power grid side; the direct-current load is connected to the direct-current side; the alternating-current load is connected to an alternating-current power grid side; the intelligent fusion terminal is used for uniformly monitoring and scheduling the photovoltaic power generation module, the energy storage module, the electric energy quality management module, the isolated island operation module and the feeder line protection module; according to the method, continuous power supply can be guaranteed when the power grid breaks down, rapid recovery is achieved after the fault is removed, and it is guaranteed that the system has extremely high robustness and safety.

The invention provides a DCDC converter, a control method thereof and a communication base station power supply system. A busbar connecting end of the DCDC converter is connected with a DC busbar, and a battery connecting end of the DCDC converter is connected with a battery module; the DCDC converter is used for adjusting the duration that the current of the battery connecting end is greater than or equal to a first current threshold to a second duration when the duration that the current of the battery connecting end is less than a first current threshold is less than a first duration and the voltage of the battery connecting end is less than a first voltage threshold, or adjusting the duration that the current of the battery connecting end is greater than or equal to the first current threshold to a second duration, adjusting the duration that the voltage of the battery connection end is greater than or equal to the first voltage threshold to a third duration; and when the duration in which the current of the battery connecting end is less than the first current threshold is greater than or equal to the first duration, adjusting the duration in which the current of the battery connecting end is greater than or equal to the first current threshold to a fourth duration. The DCDC converter can prevent the battery module from entering the sleep mode in the process of controlling the battery module.

The utility model relates to a multi-energy complementary energy system, which comprises a multi-energy power generation part, a multi-energy complementary converter, an energy storage system and a power grid, the multi-energy power generation part comprises a wind driven generator, a photovoltaic array and a hydroelectric generator; the multi-energy complementary converter comprises two AC / DC rectifiers, a photovoltaic MPPT controller, a bidirectional DC / AC inverter and a DC bus, the two AC / DC rectifiers are electrically connected with the wind driven generator and the hydroelectric generator respectively, the photovoltaic MPPT controller is electrically connected with the photovoltaic array, the energy storage system comprises a bidirectional DC / DC module and a super capacitor, and the super capacitor is connected with the DC bus through the bidirectional DC / DC module; the power grid is connected with the direct current bus through the bidirectional DC / AC inverter; when the system is used for supplying power to the electric equipment, energy conservation and emission reduction can be realized, meanwhile, the power operation cost is greatly reduced, and great economic benefits are brought.

The invention discloses a DC bus voltage stabilization system and method for an AC / DC micro-grid. The method comprises the following steps: transmitting photovoltaic electric energy to a DC bus through a Boost converter of a photovoltaic power generation unit; a super capacitor energy storage branch and a storage battery energy storage branch of the hybrid energy storage unit are connected in parallel to a direct current bus through independent bidirectional Buck-Boost converters; the direct current bus electric energy is converted into alternating current electric energy through a grid-connected inverter of the alternating current inversion grid-connected unit; after the direct-current bus voltage, the voltage of each unit, the current and the energy storage charge state information are obtained through a sampling link of the special control unit, an adjusting instruction is generated through operation, the direct-current bus voltage is stably controlled, and the stability of the direct-current bus voltage is kept. Through hardware design optimization, the DC bus voltage anti-disturbance capability is significantly improved, and the service life of energy storage equipment is prolonged.

The invention belongs to the technical field of micro-grids, and particularly discloses and provides a micro-grid hybrid energy storage optimization method, which comprises the following steps of: acquiring a direct current bus power unbalance amount in real time, decomposing the direct current bus power unbalance amount into high and low frequency components through self-adaptive filtering and forming benchmark reference power, acquiring photovoltaic actual power data, counting overrun duration, total duration and times of the photovoltaic actual power data, and calculating the photovoltaic actual power data according to the overrun duration, the total duration and the times of the photovoltaic actual power data. Judging the type and severity level of photovoltaic fluctuation by combining a preset rule on the basis, querying a power distribution mapping table according to fluctuation characteristics, determining a power distribution strategy of a battery and a super capacitor, controlling energy storage execution operation, collecting actual power response data to perform tracking precision and response timeliness analysis, and dynamically adjusting the strategy according to an analysis result. Closed-loop optimization is formed; according to the invention, accurate perception of photovoltaic fluctuation characteristics and optimization adaptation of energy storage resources are realized, the renewable energy consumption capability and the system operation stability are effectively improved, and the overall service life of the hybrid energy storage equipment is significantly prolonged at the same time.

A method is provided. The method comprises: obtaining a current state of charge of an energy storage device of a thermal pump system, wherein the thermal pump system comprises a heat pump; determining one or more operating modes for the thermal pump system based on the current state of charge of the energy storage device; and controlling the thermal pump system based on the one or more operating modes, wherein controlling the thermal pump system comprises electrically connecting the energy storage device and / or an external power source to the heat pump such that the energy storage device and / or the external power source provide power to the heat pump.

The invention discloses an AC-DC hybrid power distribution system, and belongs to the technical field of power distribution control. The device is applied to a low-voltage side of a distribution transformer area of a power distribution network and supports alternating-current power distribution and direct-current power distribution at the same time. Comprising an MPR controller, an alternating-current power distribution unit and a direct-current power distribution unit which are arranged in a power distribution cabinet, and the MPR controller is connected with the alternating-current power distribution unit and the direct-current power distribution unit for bidirectional communication; the medium-voltage direct-current bus is connected with the alternating-current power distribution unit through a bidirectional four-leg PCS and is connected with the direct-current power distribution unit; the bidirectional four-bridge-arm PCS realizes electric energy bidirectional conversion between the AC power distribution unit and the medium-voltage DC bus, and provides a stable DC power supply for the DC power distribution unit. According to the invention, scenes such as rated grid connection and margin absorption of photovoltaic power generation are formed by adding energy storage and micro-grid control, so that the stability of power supply is ensured; the bidirectional four-bridge-arm PCS is used for solving the electric energy quality problems of three-phase imbalance, harmonic waves, reactive compensation and the like.

This disclosure provides a DC direct-connected energy storage system and its control method, apparatus, equipment, and storage medium. The method includes a DC direct-connected energy storage system based on energy storage batteries. The energy storage system includes N constant-voltage modules and M voltage-regulating modules, where N is much larger than M, and N and M are natural numbers. The N constant-voltage modules and M voltage-regulating modules are connected in series to a DC power grid. The topology of a single constant-voltage module differs from that of a single voltage-regulating module: a single constant-voltage module includes a first battery cluster and a first half-bridge; a single voltage-regulating module includes a second battery cluster, a DC pre-charge circuit, an LC filter circuit, and a second half-bridge. In the DC direct-connected energy storage system of this disclosure, the majority of constant-voltage modules do not require LC filter circuits and DC pre-charge circuits; only a small number of voltage-regulating modules need PWM control, which reduces switching losses, improves switching efficiency, saves circuit costs, and simplifies the control strategy.

The invention discloses a data center combined cooling heating and power supply system based on mixed hydrogen energy and a control method thereof, and the system comprises a hydrogen source supply and storage module which is used for inputting hydrogen for power generation, a power generation and energy supply module which is used for converting the hydrogen into electric energy, and a DC micro-grid module which is used for providing the electric energy for a data center. The heat management and application module is used for recycling and applying heat generated during power generation, and the control and protection module is used for controlling the modules. According to the invention, hydrogen energy efficient power generation, waste heat cascade recovery and intelligent scheduling are realized through modular cooperation, the problems of high carbon emission, response delay and energy waste in the prior art are solved, and the system has the advantages of significantly reducing carbon emission, optimizing electric energy use efficiency, improving power supply continuity and energy utilization rate, and simultaneously realizing combined supply of cooling, heating and power.

A vehicle power management system and method are provided for disconnecting / resetting a load and using a current profile based on vehicle information. Each channel of the power management system can be turned off automatically to isolate a faulted load or commanded to reset a downstream device. Also, the power management system can compensate its response based on ambient temperature or other vehicle conditions. Other embodiments are provided.

An electrical system having a voltage converter and an external control circuit for controlling the converter is disclosed. The invention relates to an in-vehicle electrical system comprising at least one main battery (1), a primary network (VR1) directly supplied with power from the main battery, a voltage converter (3) supplying power to a secondary network (VR2), the voltage converter being supplied with power from the main battery via a first supply line (2) comprising at least one smoothing filter (22), the system is characterized in that it comprises an external control circuit (4) for controlling the converter, the circuit being configured to selectively activate or disable the operation of the voltage converter in order to minimize the voltage drop across the primary network when the voltage converter is activated.