163results about "Load balancing in dc network" patented technology

Described is an operating machine (1) provided with: an electrical system (2), a plurality of user devices powered by the electrical system, including an electric motor (21, 22) set up to supply the power required by one or more other user devices, an electrical charge storage device (3) connected or connectable to the system (2) and arranged to power the user devices of the machine (1), a control element which can be operated by an operator to control the operation of one or more user devices and an electronic processing unit comprising a power management module (41) configured to adjust a power delivered to the user devices as a function of at least one safety threshold of a power which can be delivered by the storage device (3). At least one generator unit (26) connected or connectable to the electrical system (2) is made available and in addition the power management module (41) is configured to adjust the operation of the generator unit (26) so that it can power the storage device (3) and / or the user devices, through the system (2), based on a power requested by the user devices themselves.

Device and method for the highly available power supply of an on-board electrical system in a motor vehicle, wherein the on-board electrical system comprises at least two sub-systems, each of which is supplied with power via a DC-DC converter, comprising at least one power distribution module which includes a conductive connection between the two sub-systems, wherein the power distribution module comprises at least one first switching module and at least one second switching module for coupling or disconnecting the two sub-systems, and wherein the conductive connection has at least one star point located between the two sub-systems and to which at least one energy storage device can be connected, wherein the first switching module is connected in series between a first input of the power distribution module and the star point, and wherein the second switching module is connected in series between a second input of the power distribution module and the star point.the inputs are set up for connection to the respective DC-DC converters.

This invention discloses an active damping control method for bipolar DC distribution systems based on modulus decomposition. It incorporates line coupling into the system's stability criteria and active damping parameter design, deriving the pole-mode transformation matrix of the metal-return bipolar DC distribution system and obtaining a decoupling model of the bipolar DC line in the modulus component space. The modulus models of the source-side converter and load are also derived. Based on the established decoupling model of the bipolar DC distribution system in the modulus component space, an active damping control method based on modulus decomposition is proposed. This invention considers the impact of DC distribution lines on stability, incorporating line coupling into the system's stability criteria and active damping parameter design. The modulus damping control scheme proposed in this invention can more effectively suppress instability caused by the negative impedance characteristics of constant power loads and also provides a basis for parameter adjustment.

Processing plant (1) for the production of products and comprising: several machines (2), each comprising: a frame (4), several working elements (5) supported by the frame (4), and several actuator devices (6) supported by the frame (4), coupled to respective working elements (5) and using electrical energy; and at least one first electrical line (7) supplying energy to the machines (2); wherein the processing plant (1) is characterized in that it comprises several storage devices (9) which are each configured to store electrical energy, are coupled to a respective machine (2) and are configured to exchange electrical energy both with the first electrical line (7) and with the actuator devices (6) of the respective machine (2).

This invention relates to the field of microgrid control and discloses a method for regulating a highway service area microgrid based on distributed photovoltaic energy storage. The method includes the following steps: First, traffic flow data is collected to construct a traffic-energy potential field model, mapping discrete vehicles to a continuous potential field to predict net power demand. Second, a kinetic-thermal entropy mapping is constructed using vehicle kinetic energy characteristics, and battery thermal management feedforward control is executed before load arrival. Simultaneously, variational mode decomposition parameters are adaptively adjusted according to the potential field gradient to decompose the power command into high-frequency and mid-to-low-frequency components. The high-frequency components are absorbed by supercapacitors, while the mid-to-low-frequency components are collaboratively distributed among battery packs based on a virtual complex impedance model constructed using health status and temperature. This invention achieves proactive defense against impact loads and refined lifespan extension of energy storage through traffic-energy cross-domain coupling, significantly improving the voltage rigidity and operational stability of the microgrid under extreme conditions.

The application belongs to the technical field of DC micro-grid control, and discloses a DC micro-grid voltage regulation method under time-frequency constraints, which comprises the following steps: step S1, collecting local node output voltage, inductance current and voltage tracking error integral, and establishing a three-dimensional small signal model containing source voltage / load disturbance and line impedance uncertainty; step S2, using generalized KYP lemma to convert low-frequency disturbance suppression index into limited frequency domain performance constraint, and combining with time domain Lyapunov steady-state constraint; step S3, solving completely dispersed linear matrix inequality group, directly obtaining local state feedback gain, and realizing plug-and-play control without communication. The DC micro-grid voltage regulation method under time-frequency constraints can not only significantly improve the rapid response and robustness of the system, but also effectively reduce the communication burden, and is suitable for high-reliability autonomous operation of aircraft and ground DC micro-grid.

The application discloses a direct-current micro-grid voltage consistency control method and device, the method constructs a six-dimensional enhanced state space containing safety monitoring error, error history trend characteristics, multi-machine consistency characteristics, bus average voltage, voltage change rate and hysteresis action feedback; the six-dimensional state vector is input into a PPO intelligent agent to generate a voltage compensation correction signal; a hierarchical guidance reward function is introduced in the training stage to activate a three-level logic architecture composed of a survival layer, a transient layer and a steady-state layer, and a multi-stage pipeline processing is adopted for strategy iteration optimization; the compensation signal is superimposed to a bottom double closed-loop controller to realize accurate regulation of bus voltage. Through multi-dimensional space-time feature perception and hierarchical guidance, the application realizes rapid and smooth recovery and ultra-high precision stability of voltage in the load mutation and distributed power plug-and-play scene, and effectively solves the problem that safety, response speed and consistency accuracy are difficult to be considered in the control of a direct-current island micro-grid.

On-board electrical system arrangement (2) comprising at least one primary on-board electrical system (4) and one secondary on-board electrical system (5) for supplying a plurality of consumers (10.n) in a vehicle (1), characterized by the fact that the primary electrical system (4) for providing primary power (4.11) for supplying consumers (10.n) can be coupled to an electrical system battery (3) or is coupled and the secondary on-board network (5) is coupled to the on-board network battery (3) to provide a secondary power supply (5.11) for the redundant supply of a part (11.nm) of the consumers (10.n). wherein a switchable balancing device (8) is arranged between the primary electrical system (4) and the secondary electrical system (5), which couples or keeps coupled or decouples or keeps decoupled the primary electrical system (4) and the secondary electrical system (5) depending on the power supply, wherein in normal operation (100) of primary on-board network (4) and secondary on-board network (5) the balancing device (8) is open in order to decouple the primary on-board network (4) and the secondary on-board network (5) from each other, wherein in the coupled state of primary on-board network (4) and secondary on-board network (5) a current regulator for providing the primary power (4.11) is provided in the primary on-board network (4) as a regulator (20) and a voltage regulator for providing the secondary power (5.11) is provided in the secondary on-board network (5) and in the uncoupled state both in the primary on-board network (4) and in the secondary on-board network (5) a voltage regulator for providing the primary power (4.11) and the secondary power (5.11) is provided as a regulator (20, 22).

This invention relates to the field of power Internet of Things and smart distribution network monitoring technology, and discloses a smart scheduling system for highway charging resources. The system includes: a dual-end source-side three-level rectification and busbar construction module, which constructs a bipolar three-wire DC transmission busbar between two service areas; a cross-regional transmission line impedance identification and status sensing module, which calculates the distributed inductance and capacitance parameters of long cables in real time; a terminal multi-port adaptive power routing module, which physically selects the voltage level to suit vehicle demand through a switch matrix; and a distributed parameter resonance locking and drive control module, which locks the operating frequency to the line's intrinsic resonant frequency and uses distributed parameters to achieve soft switching. This invention achieves long-distance energy exchange and voltage adaptive matching through cross-regional interconnection and multi-level routing, and transforms line parasitic parameters into resonant elements, reducing transmission losses.

The invention relates to methods and devices for minimizing a corrosion-prone DC protective conductor current in a DC system grounded via a protective conductor designed as a foundation earth electrode, with a connected Class I equipment. Balancing methods describe injecting a balancing current at an earth connection point on the housing of the Class I equipment via an output circuit between a non-faulty live conductor and the earth connection point, wherein the balancing current polarity and amplitude are adjusted such that the DC protective conductor current in the foundation earth electrode is minimized. In contrast to this DC balancing, DC compensation involves injecting a compensation current at the earth connection point of the Class I equipment housing via an output circuit extending between the faulty live conductor and the earth connection point.The compensation current is adjusted with respect to polarity and amplitude to minimize the DC protective conductor current in the foundation earth electrode. The balancing current and the compensation current are set by controlled or regulated switching of current sources, resistors, or a PWM signal.

The application belongs to the technical field of ship power system and energy management control, and discloses a hybrid power tugboat adaptive parameter mapping energy management method and system, which comprises a diesel generator unit, a power battery, a super capacitor, an energy management controller and a load. The method obtains a future load prediction sequence through a single load prediction module, extracts prediction mean value, peak value, ramp rate peak value and pulse index and the like characteristics, and generates an adaptive parameter set through a mapping function in combination with the power battery and the super capacitor state, which is used for mode determination, target setting and weight setting; diesel power base load power is generated in a slow cycle, and quadratic programming is solved in a fast cycle in a three-source collaborative and charging mode. The application realizes optimal power distribution of the battery and the super capacitor under multiple constraint conditions, makes the super capacitor preferentially bear the pulse and maintain the target energy band, and limits the battery peak value and the power change rate, so as to reduce operation cost and carbon emission.

The application belongs to the technical field of water disinfection, and specifically discloses a linkage type disinfection device based on wind-solar complementary power supply, which comprises a reaction tank, a monitoring module, a control module and a wind-solar complementary power supply module, the monitoring module is used for monitoring the residual chlorine value of water in real time; the control module selects a disinfection strategy according to the threshold interval to which the residual chlorine value belongs, controls the reaction tank to work based on the disinfection strategy, and estimates the total power demand of the next disinfection cycle; the wind-solar complementary power supply module receives the demand, dynamically selects a wind-solar direct supply mode or a wind-solar battery parallel supply mode to supply power to the system. The application realizes stable operation of the disinfection device based on wind-solar complementary power supply, ensures accurate and stable disinfection effect through matching control of residual chlorine feedback and solid medicament slow-release characteristics, and efficiently utilizes fluctuating renewable energy through intelligent linkage between the load and the power supply side, thereby improving the overall energy efficiency and reliability of the off-grid system.

The invention discloses a common DC bus multi-machine operation energy storage system energy management control device, which comprises a DC bus, a plurality of loads, a control module, an energy management module and an energy storage module, and is characterized in that the input end group of the control module is electrically connected with a plurality of power sensors; the signal output end of the control module is connected with the control signal input end of an energy management module, the energy management module is electrically connected with a first switching module through a DC / DC conversion module, the first switching module is electrically connected with each load, and the energy management module is electrically connected with a first conversion module. The control module judges the working state of each load according to the real-time power data of each load acquired by the power sensor, and when the power value of a certain load is smaller than a second power preset threshold value, the load can be judged to be in a braking state; and braking energy generated by braking of the load is transferred to the energy storage module for storage through the first switching module and the DC / DC conversion module.

This invention discloses an active damping control structure and method for a DC transformer and a DC distribution network, belonging to the field of DC transformer control technology. In the control structure: a summation module sums the input voltages of M sub-modules to obtain voltage v. bus The filter module filters out voltage v bus The AC component in the equation yields the DC voltage v. DC The averaging module calculates the voltage v respectively. bus and DC voltage v DC Divide by M to obtain the reference value v avg and reference value v DCref The input voltage equalization controller realizes the input voltage v of each submodule j. in_j Compared with reference value v avg Zero steady-state error regulation, output power p ivs_j The input voltage regulator controller implements the input voltage v of each submodule j. in_j Compared with reference value v DCref Zero steady-state error regulation, output power p ivr_j The output voltage regulator achieves the output voltage V. o Compared with reference value V oref Zero steady-state error regulation, output power regulation p ove The actual power calculator calculates the actual power of each submodule j using the instruction p. pu_j The control structure and method of this invention ensure stable operation of the transformer.

This utility model relates to the field of integrated energy system technology and discloses a multi-port adjustable photovoltaic-storage-DC-flexible integrated energy power supply system. It includes a 750V DC bus platform, a photovoltaic power generation unit, a grid input terminal, a V2G charging pile, an energy storage unit, and a control cabinet cluster. The photovoltaic power generation unit includes a photovoltaic array, an MPPT controller, and a photovoltaic DC combiner box with a DC 750V output. The photovoltaic power generation unit is electrically connected to the 750V DC bus platform. The control cabinet cluster includes control cabinet one, control cabinet two, and control cabinet three. This utility model, through a multi-port DC power router architecture combined with intelligent control strategies, reduces AC / DC conversion links, significantly reducing energy loss, improving the overall energy utilization rate of the system, achieving energy complementarity and optimized configuration, enhancing the system's power supply capacity in emergency situations, and improving the reliability and stability of the power supply.

A software-defined power management and distribution system for spacecraft and other remote systems, which maximizes adjustability of the electrical power systems thereof using software, and without having to change the associated hardware is described. Embodiments of the present apparatus are remotely adjustable, thereby enabling more rapid configuration of spacecrafts during construction as well as reconfiguration thereof while in orbit.

Charging infrastructure (6) for charging at least one electrically powered or motorizable motor vehicle (8), comprising at least one charging network (10, 10a, 10b, 10c, 10d, 10e, 10f) with a number of charging columns (14) as charging points, - wherein the charging stations (14) are interconnected by means of an island network (16, 16a, 16b, 16c, 16d, 16e, 16f), - wherein the island grid (16, 16a, 16b, 16c, 16d, 16e, 16f) is coupled or can be coupled to an external supply network (18) and / or an energy generator (30), - wherein the charging network (10, 10a, 10b, 10c, 10d, 10e, 10f) has at least one battery storage unit (12) as an electrical buffer storage unit, - wherein the charging stations (14) of the charging network (10, 10a, 10b, 10c, 10d, 10e, 10f) are designed as a master charging station (32) and at least one slave charging station (34) coupled to it by signal technology, - wherein the master charging station (32) has a first voltage converter (36) as an interface between the island grid (16, 16a, 16b, 16c, 16d, 16e, 16f) and the supply grid (18), as well as a controller (38) as the central control unit of the associated charging network (10, 10a, 10b, 10c, 10d, 10e, 10f), characterized in that at least two charging networks (10, 10a, 10b, 10c, 10d, 10e, 10f) are coupled to each other via an extension point (24) in such a way that a common island grid (16) is formed.

The invention belongs to the technical field of distributed direct current micro-grid hydrogen production system operation control, and discloses an off-grid hydrogen production system bus voltage fluctuation suppression and SOC balance control method and a medium, and the method comprises the following steps: 1, building a renewable energy hydrogen production system; step 2, collecting a charge state signal of the energy storage battery and an output voltage and an output current of the converter; step 3, obtaining a charge state average value and an output voltage average value according to the charge state signal, the output voltage and the output current; step 4, obtaining an SOC equalization coefficient according to the output current, the charge state signal and the charge state average value; and step 5, obtaining the duty ratio of the converter according to the average value of the output voltage and the SOC equalization coefficient, and obtaining a driving signal of a converter power tube through PWM (Pulse-Width Modulation). A droop-free control framework is adopted, a control instruction is directly generated through a consistency algorithm and a local signal, the defects of traditional droop control are avoided, and the dynamic response speed and the control precision of the system are improved.

There is disclosed a power network for a transport climate control system, comprising: a DC bus configured to provide power from a plurality of power sources to a load, including one or more autonomous power sources; one or more autonomous control modules, each associated with a respective one of the autonomous power sources; and a primary control module configured to determine a resource demand value for the power network by monitoring power delivery to the load. The resource demand value varies as a quantitative variable, and each autonomous control module receives the resource demand value and determines whether to cause power delivery from the respective autonomous power source to the DC bus based on the resource demand value and a corresponding resource availability function associated with the respective power source

A control device includes: a first control unit capable of controlling an electrical power conversion unit in a manner so that an electrical power is supplied from a generator to at least one of an electrical power storage device or a first load device; and a determination unit that determines a residual capacity of the electrical power storage device. In response to the determination unit determining that the residual capacity of the electrical power storage device becomes greater than or equal to a first threshold value, the first control unit can execute residual capacity reduction control for reducing the residual capacity of the electrical power storage device by controlling the electrical power conversion unit in a manner so that an electrical power is supplied from the electrical power storage device to the generator.

There is disclosed a power network for a transport climate control system, comprising: a DC bus configured to provide power from a plurality of power sources to a load, including one or more autonomous power sources; one or more autonomous control modules, each associated with a respective one of the autonomous power sources; and a primary control module configured to determine a resource demand value for the power network by monitoring power delivery to the load. The resource demand value varies as a quantitative variable, and each autonomous control module receives the resource demand value and determines whether to cause power delivery from the respective autonomous power source to the DC bus based on the resource demand value and a corresponding resource availability function associated with the respective power source.

A power control arrangement (100) for a mining / construction machine comprises: a power bus (110) connectable to a power grid (200), receiving an input power (IP) from the power grid; a first battery (120) and at least one second battery (130) receiving / supplying power from / to the power bus; and at least one load (310) receiving an output power (OP) from the power bus; wherein the power control arrangement adapts a power limit margin of the power grid based on a power supply mode of the power bus, wherein the power supply mode comprises that: 1) only one of the power grid, the first battery, or the second battery supplies power to the power bus; or 2) a combination of at least two of the power grid, the first battery and the second battery supplies power to the power bus.

The present application belongs to the technical field of microgrid stability analysis, and particularly relates to a stability analysis and early warning method for a building hydrogen-electricity coupling direct current microgrid, which comprises the following steps: obtaining electromagnetic transient state variables of an electrical subsystem in the direct current microgrid and electrochemical reaction state variables of a hydrogen energy subsystem, and constructing a unified feature matrix of time scale dynamic characteristics; extracting stability features, projecting the stability features to a low-dimensional space through nonlinear mapping, forming a representation fingerprint, and calculating an instantaneous stability margin under a current state; performing time sequence deduction, calculating a stability evolution trajectory within a future time window, and generating a predicted offset vector of an offset direction and amplitude; when the predicted offset vector exceeds the instantaneous stability margin, taking minimization of the predicted offset vector as an optimization objective, and generating a collaborative control strategy for collaborative regulation of a hydrogen energy subsystem operating point and an electrical subsystem operating point. The present application can realize perception and early warning of instability risks, and guarantee stable and reliable operation of the microgrid.

The application discloses a kind of active power control method and device design method of direct current distribution network information physical cooperation under the access of multiple microgrids, comprising: formulating information physical cooperation correlation analysis and collaborative active power regulation architecture;In upper layer, i.e. microgrid layer, the centralized control method of physical layer according to power flow constraint is designed;In lower layer, i.e. distributed resource layer, combination fault-tolerant control method is designed;The effectiveness of the method is verified by building experimental scene.The direct current distribution network under the access of multiple microgrids can effectively suppress the fluctuation of active power and realize data transmission path matching based on business requirements, with stronger active anti-interference capability, in consideration of the case that multiple microgrids are accessed.

For example, a current consumption adjuster may be configured to adjust a current consumption from a power supply of an integrated circuit. For example, the current consumption adjuster may include a controllable load circuitry to controllably apply one or more loads to the power supply of the integrated circuit. For example, the current consumption adjuster may include a controller configured to identify a current consumption event including a transition of a current consumption of the integrated circuit from the power supply. For example, the controller may be configured to control activation of the controllable load circuitry to apply an event-based load to the power supply, for example, based on the current consumption event.

This application relates to a feedforward control method, system, and controller for elevator energy conversion. The feedforward control method includes: predicting the segment type, start and end times, and confidence level of the next operating segment of the elevator in the prediction time domain within each scheduling cycle; the segment type includes a deceleration regeneration segment and an acceleration power consumption segment; when the confidence level reaches a threshold or higher, a target power command and control boundary command are preset based on the segment type before a preset time before the start of the next operating segment; based on the target power command and the control boundary command, when the segment type is a deceleration regeneration segment, the power conversion circuit is controlled to execute the energy storage unit to absorb energy from the DC bus; when the segment type is an acceleration power consumption segment, the power conversion circuit is controlled to execute the energy storage unit to release energy to the DC bus, thereby reducing bus voltage and current spikes and impacts, and increasing the priority absorption ratio of regenerated energy.

We provide a battery-free calculator that uses solar energy for power, eliminating the need for disposable batteries, reducing the cost of using a calculator for users, and minimizing the environmental burden caused by battery disposal. [Solution] The solar-powered battery-free calculator comprises a charging module 100, a stabilization module 6, and a calculator body module 9. The charging module is connected to the calculator body module via the stabilization module. The charging module includes a solar panel 1 having a solar cell output positive electrode and a solar cell output negative electrode, a reverse current prevention unit 2 having a reverse current prevention positive electrode and a reverse current prevention negative electrode, and a farad capacitor 5. The output positive electrode of the solar cell is connected to the positive electrode of the reverse current prevention unit, and the farad capacitor is connected in parallel to both ends of the solar panel and the reverse current prevention unit. The negative electrode and power supply negative electrode of the reverse current prevention unit are configured as the power supply positive electrode and power supply negative electrode of the charging module, respectively, and the power supply positive electrode is connected to the calculator body module via the stabilization module. This calculator is powered by the farad capacitor and solar panel and has a function to automatically switch the power supply mode.

The invention relates to a method for controlling a battery-electric drive system for a motor vehicle, wherein the battery-electric drive system comprises a high-voltage battery (1), at least one electric traction drive motor (2) and a plurality of electrical auxiliary loads (3), and the at least one electric traction drive motor (2) and the electrical auxiliary loads (3) are supplied with electric power from the high-voltage battery (1), comprising the following steps: • - detecting a present state of charge and / or a present battery current limit value of the high-voltage battery (1), • - reducing the drive power of the at least one electric traction drive motor (2) and / or switching off electrical auxiliary loads (3) on the basis of the detected present state of charge and / or the detected present battery current limit value. In line with the method according to the invention, a specific priority is assigned to each electrical auxiliary load (3) and the electrical auxiliary loads (3) are switched off or power consumption by the electrical auxiliary loads (3) is reduced on the basis of the detected present state of charge and / or the detected present battery current limit value individually depending on the specific priority of the respective electrical auxiliary load (3), so that electrical auxiliary loads (3) with a comparatively higher specific priority are switched off, or the power consumption by these electrical auxiliary loads is reduced, with a lower priority than electrical auxiliary loads (3) with a comparatively lower specific priority.

The application discloses a kind of evaluation methods, device, equipment and storage medium of newly added direct current access configuration, it is related to power system planning and operation control technical field, can intuitively and accurately measure the voltage support intensity of each newly added direct current access configuration to two kinds of weak nodes, provide scientific and quantitative basis for the selection decision of access configuration.The method comprises: constructing receiving-end power grid simulation model, receiving-end power grid simulation model is used to identify the first weak node and the second weak node of receiving-end power grid;According to the candidate drop point position and candidate topology type of newly added direct current setting, form the access configuration scheme set of newly added direct current;Each access configuration scheme in the access configuration scheme set of newly added direct current is applied to receiving-end power grid simulation model respectively, to calculate the voltage support quantitative index of access configuration scheme;According to the voltage support quantitative index of access configuration scheme, the access configuration scheme of corresponding newly added current is comprehensively evaluated, and the evaluation result of access configuration scheme is obtained.

The invention relates to a method for controlling a battery-electric drive system for a motor vehicle, wherein the battery-electric drive system comprises an HV battery, at least one electric traction drive motor and a plurality of electrical auxiliary consumers, and the at least one electric traction drive motor and the electrical auxiliary consumers are supplied with electrical power from the HV battery, comprising the following steps: - Recording the current state of charge and / or the current battery current limit of the HV battery; - Reducing the drive power of at least one electric traction drive motor and / or switching off electrical auxiliary consumers depending on the detected current state of charge and / or the detected current battery current limit. The method according to the invention is characterized in that each electrical auxiliary consumer is assigned a specific priority and the switching off of the electrical auxiliary consumers or a reduction in the power consumption of the electrical auxiliary consumers is carried out individually depending on the specific priority of the respective electrical auxiliary consumer, depending on the detected current state of charge and / or the detected current battery current limit value, so that electrical auxiliary consumers with a comparatively higher specific priority are switched off or have their power consumption reduced in a subordinate manner to electrical auxiliary consumers with a comparatively lower specific priority.