218 results about "Regenerative energy" patented technology

The invention discloses a variable frequency driving device energy recovery control system based on direct power supply of a high-voltage power grid, and relates to the technical field of electrical transmission and energy recovery control. Updating the power grid impedance model in real time by using a complex impedance calculation method; load operation state parameters are dynamically adjusted in combination with motor end output power, rotating speed change and torque calculation; according to the method, regenerative energy is accurately calculated, a feedback path is adjusted according to voltage fluctuation and frequency deviation of a power grid, a feedback current fluctuation ratio and a power factor are monitored, a feedback path conduction proportion is optimized in real time, when the current is unstable or the power factor is abnormal, a suboptimal path is automatically switched, and continuous and stable operation of a system is guaranteed; according to the invention, the energy feedback efficiency and the power grid compatibility of the high-voltage power grid variable-frequency driving device are effectively improved, and the method is suitable for energy feedback application of a high-power motor driving system.

The invention relates to a cooperative braking control method and device based on a road adhesion coefficient and energy recovery. The method comprises the steps that vehicle state parameters of a current control period are obtained, and the vehicle state parameters comprise the vehicle longitudinal speed, the vehicle transverse speed, the vehicle yaw velocity and the angular velocity of each wheel; a preset prediction model is solved according to the vehicle state parameters and the constraint conditions, and the control quantity of each wheel in the next control period is obtained; wherein the prediction model takes closer actual longitudinal speed to expected longitudinal speed, maximization of regenerated energy, stable change of controlled quantity and convergence of slip rate of each wheel as targets, and the constraint conditions comprise a wheel constraint condition, a motor hydraulic system constraint condition, a battery charging power constraint condition and a braking force constraint condition. The wheel constraint condition is related to the road adhesion coefficient corresponding to each wheel. By the adoption of the method, the energy recovery efficiency can be maximized, and the stability and safety of the vehicle are guaranteed.

The invention discloses a domestic high-power IGBT rectification system and method, and relates to the technical field of IGBT rectification, and the method comprises the steps: constructing an active front-end rectification main circuit; a direct current side hybrid harmonic modulation auxiliary circuit is integrated; performing multiple delay signal elimination operation on the sampled signal, filtering out a harmonic interference signal, and locking the frequency and phase of the fundamental voltage of the power grid through a phase-locked loop; establishing a control structure of a voltage outer loop and a current inner loop, generating an instruction amplitude of a grid-side active current and an ideal sinusoidal current reference waveform, and controlling an IGBT in an active front-end rectification main circuit in real time; real-time fast Fourier transform analysis is carried out on the actual input current of the grid side, and residual harmonic components are identified; and feedback management of regenerated energy is realized. The invention provides a fused high-adaptability active front-end IGBT (Insulated Gate Bipolar Translator) rectification method and system which can stably operate under the condition of power grid voltage distortion and realize deep harmonic suppression and efficient energy bidirectional flow.

A variable-frequency drive includes a rectifier, a filter, an inverter, a capacitor bank, and control circuitry. The rectifier converts AC power from a power source to DC power on a DC bus for filtering by the filter. The inverter converts the DC power to three-phase AC power for output to the electric motor. The capacitor bank has one or more capacitors connected to the DC bus. The capacitor bank can store regenerative power on the DC bus from the inverter and can supply the stored DC power to the DC bus for conversion to the three-phase AC power to drive the electric motor. The control circuitry pre-charges the capacitor bank from the AC power of the power source. The control circuitry monitors one or more parameters of the variable-frequency drive and detects one or more fault conditions associated with the one or more monitored parameters.

The invention provides an energy management method and device for an elevator energy supply system. The method is executed by a cloud server and a local controller which work cooperatively. A cloud server obtains historical and real-time operation data of an energy supply system, predicts the available output power of a photovoltaic unit and the comprehensive power demand of an elevator load in a first time period in the future, generates an energy scheduling strategy of the first time period through optimization calculation, and issues the energy scheduling strategy to a local controller; the local controller collects the local real-time operation state of the energy supply system, selects the current execution strategy and controls the energy flow path of each unit so as to supply power to the elevator load or recover the regenerated energy of the elevator load. According to the method, the energy-saving economy can be improved, the two free energy sources including photovoltaic power generation and elevator regeneration energy are preferentially utilized to the maximum extent through cloud collaborative scheduling, the energy storage charging and discharging strategy is optimized to make full use of the commercial power peak-valley price difference, and the overall operation electric charge of an elevator system is remarkably reduced.

The invention discloses an urban rail energy consumption scheduling method based on artificial intelligence multi-objective optimization, and the method comprises the steps: effectively solving a problem of scheduling decision limitation caused by a single optimization objective in the prior art through comprehensive real-time data processing, multi-objective collaborative optimization and intelligent algorithm iteration solution; the optimal control of the overall operation energy consumption of the rail transit system is realized; the train operation energy efficiency, the regenerated energy utilization rate and the operation punctuality rate are effectively improved, meanwhile, the peak load of a traction power supply system is reduced, the overall energy utilization efficiency and the operation performance of rail transit are remarkably improved, and the dual purposes of energy conservation, consumption reduction and efficient operation of the system are achieved.

A system and method for regulating an operating temperature of an energy storage system configured to provide power to a vehicle. The system may comprise a TMS and a controller. The controller may be configured to receive route information, vehicle speed and / or payload and determine aggregate power demand and aggregate regeneration energy, and estimated charging / discharging current. The controller may be furthered configured to initiate a ramp-up procedure based on the estimated discharging current associated with the next sequential incoming segment and a preparation time, and / or to initiate a ramp-up procedure based on the estimated charging current associated with the next sequential incoming segment and a preparation time.

The invention provides an energy recovery system, a control method thereof and electronic equipment, and belongs to the technical field of energy recovery. The energy recovery system is applied to an offshore wind power installation vessel and comprises a main distribution board direct current bus, a voltage detection module, a lifting system, a battery energy storage system, a brake unit and a control system. Wherein the control system can control charging of the battery energy storage system and / or control starting and stopping of the braking unit according to the direct-current bus voltage, collected by the voltage detection module, of the main distribution board and the battery charge state of the battery energy storage system. In other words, the control system can recover and consume energy generated in the operation process of the lifting system by controlling the battery energy storage system and / or the brake unit, the situation that the voltage of a direct-current bus of a main distribution board is increased due to regenerated energy, and consequently electric equipment is damaged is avoided, and the stability and safety of the lifting system are improved.

The invention provides an energy management method suitable for a hybrid power supply system of a multi-electric aircraft, and belongs to the technical field of multi-energy-storage direct-current micro-grids. The problem that an existing distributed energy management strategy cannot effectively process optimal distribution of load power among three power supplies with different characteristics, the design problem of control parameters, the charge state adjustment problem of an energy storage device and the feedback problem of load renewable energy are solved. The method comprises the steps that 1, a multi-electric aircraft hybrid power supply system is built; 2, according to the output characteristics of the power supplies, the distribution relation of load currents among the power supplies is set, and a distributed control strategy corresponding to each power supply branch is designed; and step 3, based on a power supply parameter design criterion, designing a virtual impedance parameter and an inner loop control parameter in combination with the distribution relation of the load current among the power supplies, and ensuring stable operation of the hybrid power supply system of the more-electric aircraft.

A container-handling vehicle for handling storage containers in a three-dimensional grid of an underlying storage system, comprising: at least one lifting device for lifting storage containers from and lowering storage containers to the underlying storage system, said lifting device comprises a lifting frame for gripping a storage container, a winch system for lifting and lowering the lifting frame, a motor to drive the winch system and a driver circuit with a controller controlling the motor; and at least first and second rechargeable power sources for providing power to the motor, wherein the driver circuit further comprises a regenerative energy circuit configured to harvest energy from the motor when the lifting frame is lowered 10 into the storage system and where the driver circuit is configured to direct harvested energy to the rechargeable power sources according to levels of charge in the rechargeable power sources.

The present invention discloses a port electromagnetic crane and a method and application for recycling and utilizing regenerative energy. This solution cleverly monitors the voltage changes of the common DC bus between the variable frequency motor and the frequency converter to determine in real time whether the variable frequency motor is in the electric state or the power generation state. At the same time, this solution also monitors the state of the energy storage unit and uses the energy storage unit to charge and discharge the auxiliary motor to avoid its negative impact on the system circuit. This solution switches the working state of the energy storage unit to different states through the energy manager based on the motor state information and the energy storage state information of the energy storage unit. This solution can be applied to the working control method of the port electromagnetic crane to realize energy recovery and reuse when the crane's lifting motor is working. At the same time, because the regenerative energy generated by the lifting motor is not fed back to the power grid, it will not cause impact on the power grid and will not cause pollution problems such as harmonics and flicker to the power grid.

The invention relates to the technical field of port automation control, and discloses a container yard equipment collaborative scheduling system based on digital twinning, which comprises a global physical sensing and mapping module, a super real-time shadow rehearsal module, a dynamic coupling rigidity analysis module, a micro power collaborative scheduling module and an instruction generation and closed-loop control module. The global physical sensing module constructs and calibrates a digital twinborn model in real time; the super real-time rehearsal module predicts a task time window and an energy state by utilizing dynamics simulation; and the dynamic coupling stiffness analysis module calculates collaborative matching parameters among the devices. According to the method, through a model predictive control framework, the dynamic coupling rigidity is taken as a weight to adjust the microscopic track of the equipment, so that the power demand window of the automatic guided vehicle is aligned with the track-mounted gantry crane regenerative energy feedback window in a time sequence, and through the dynamic inverse model closed-loop control based on the safety envelope, the power demand window of the automatic guided vehicle is optimized. And high-energy-efficiency collaborative operation and equipment safe operation in a physical disturbance environment are realized.

The invention provides a vehicle abrupt slope slow descent control method and system. The method comprises the following steps that whether a vehicle is in a regenerated energy recovery state in a single-pedal mode or not is judged; if yes, whether the abrupt slope slow descent control system is in a triggered state or not is judged, and the road surface gradient is collected; in response to the situation that the abrupt slope slow descent control system is in a trigger state, current residual regenerative braking force and vehicle speed are collected in real time, and the target vehicle speed of abrupt slope slow descent control is determined according to the current residual regenerative braking force, the road surface gradient, the vehicle gravity and the vehicle speed; and controlling the abrupt slope slow descent control system to adjust the braking force of the vehicle according to the target vehicle speed so as to stabilize the vehicle speed at the target vehicle speed, the method better realizes abrupt slope slow descent control in a single pedal mode, reduces speed fluctuation and speed rise during abrupt slope slow descent control, and improves the driving comfort and safety of the vehicle.

A container-handling vehicle for handling storage containers in a three-dimensional grid of an underlying storage system, comprising: at least one lifting device for lifting storage containers from and lowering storage containers to the underlying storage system, said lifting device comprises a lifting frame for gripping a storage container, a winch system for lifting and lowering the lifting frame, a motor to drive the winch system and a driver circuit with a controller controlling the motor; and at least first and second rechargeable power sources for providing power to the motor, wherein the driver circuit further comprises a regenerative energy circuit configured to harvest energy from the motor when the lifting frame is lowered into the storage system and where the driver circuit is configured to direct harvested energy to the rechargeable power sources according to levels of charge in the rechargeable power sources.

The invention relates to the technical field of ventilation, in particular to an air treatment system integrating a direct air trapping module and a heating ventilation air conditioning device and a control method of the air treatment system, the system comprises an HVAC module, the HVAC module comprises a fresh air inlet, a filter, a mixing point, a fan, a temperature and humidity adjusting unit and an air supply outlet which are connected in sequence, and the HVAC module further comprises a return air header pipe and an exhaust outlet; and the DAC module is provided with an air inlet, a purified air outlet, a regenerated energy input interface and a CO2 product output port. According to the system provided by the invention, the DAC module and the HVAC are efficiently coupled through wind path coordination and energy coordination, and the target node in the first to fourth nodes is started and adjusted to adjust the air flow direction for different operation modes, so that the dynamic regulation and control of the air flow path are realized, and the capability of improving the indoor air quality of the HVAC module is enhanced.

The invention discloses an energy management system of a marine lifeboat collecting and releasing device. The energy management system comprises a four-quadrant frequency converter, a super capacitor energy storage system and an energy path control module, the four-quadrant frequency converter is connected with a ship alternating current power supply and a servo motor; the direct current bus is connected with the braking unit, the braking resistor and the DC / DC bidirectional converter; the super capacitor is connected with the direct current bus through the DC / DC bidirectional converter; the energy path control module dynamically controls an energy path by monitoring the voltage and the charge state of the super capacitor in real time; through cooperative control of the four-quadrant frequency converter and the super-capacitor energy storage system, a three-level redundancy mechanism of energy storage buffering, power grid feedback and resistance energy consumption is formed, multi-level efficient utilization of regenerated energy is achieved, the energy utilization rate is increased, the problem that an existing device cannot achieve emergency recovery under the sudden power loss working condition is solved, and the energy utilization rate is increased. And the reliability and the environmental protection property of the system are obviously improved.

The invention discloses a vehicle economy and stability energy optimization method based on an HCU, and relates to the technical field of new energy vehicle control and energy management, and the method comprises the following steps: building a bus time frequency observation system, carrying out the phase fusion of a voltage signal and a current signal, and generating an impedance track and an energy spectrum baseline; coherent decomposition is carried out based on the energy spectrum base line, motor regeneration energy feedback pulse characteristics are extracted, a high-voltage accessory start-stop time sequence is identified, and a resonance coupling frequency band is positioned and superposed to an impedance track. Transient disturbance is identified through fusion of an impedance track and an energy spectrum, an interference source is predicted and positioned in combination with resonance frequency band tracking and a risk cone, virtual impedance, amplitude limiting shaping, peak shifting regulation and control and anti-mirror vibration suppression are sequentially applied, a moving damping belt is constructed, bus energy disturbance is accurately weakened, residual energy is rapidly absorbed, and the reliability of the bus energy disturbance is improved. Therefore, the system stability and the energy scheduling efficiency are enhanced.

The present invention is a system and method for recovering the kinetic energy created by movement of a vehicle frame relative to a vehicle suspension to generate electrical energy that may be utilized on-the-fly or stored in order to provide power to an electric vehicle, wherein an embodiment for a regenerative energy system uses a hydraulic system coupled to the shock absorbers of a vehicle or trailer, wherein the captured kinetic energy is transferred to a plurality of gear assemblies to convert movement of the vehicle or trailer to rotary motion that is then amplified in rotational speed by a gear reduction system to cause rotational movement of a shaft of one or more generators in a single rotational direction to thereby generate electricity that may be utilized directly by electrical motors or stored in batteries or supercapacitors.

A driving control device mounted on a vehicle includes a processor. The processor is configured to create a speed profile. The processor is configured to approximate the speed profile by a predetermined approximate model and estimate a predicted amount of regenerative energy based on an approximation result. The processor is configured to set, based on the predicted amount of regenerative energy, a first region and a second region in the approximation result as a region in which the vehicle travels using an electric motor, the first region being a region from a timing of starting of the vehicle until first time has elapsed from the timing of starting of the vehicle, and the second region being a region from a timing of deceleration of the vehicle until second time has elapsed from the timing of deceleration of the vehicle.

The invention provides a catalyst regeneration energy recovery power device, and belongs to the technical field of thermodynamics and thermodynamic. An air channel outside is communicated with the charring-regeneration system through a heat source regenerator, and the charring-regeneration system is further provided with a smoke channel which is communicated with the outside through a heat source heat exchanger and the heat source regenerator. The compressor is provided with a first steam channel communicated with the low-temperature expansion machine through the heat regenerator, the low-temperature expansion machine is communicated with the evaporator through a low-pressure steam channel, the compressor is communicated with the heat source heat exchanger through a second steam channel, and the condenser is communicated with the heat source heat exchanger through the booster pump and the evaporator. The heat source heat exchanger further communicates with a high-temperature expansion machine through a steam channel, the high-temperature expansion machine further communicates with an evaporator through a low-pressure steam channel and a heat regenerator, and the evaporator further communicates with a compressor and a condenser through a low-pressure steam channel. The condenser further communicates with the outside through a cooling medium channel, the low-temperature expansion machine and the high-temperature expansion machine are connected with the compressor and transmit power, and the catalyst regeneration energy recovery power device is formed.

The present invention discloses a method and system for dynamically adjusting the operation plan for comprehensive line energy conservation. The method includes: S1) Compiling an energy-saving operation diagram; S2) Loading the energy-saving operation diagram into the train automatic monitoring system, and the train operates according to the plan in the energy-saving operation diagram. During the train operation, adaptive adjustment for train operation energy conservation is carried out to optimize the energy-saving operation diagram; S3) Dynamically adjusting the train operation plan according to the optimized energy-saving operation diagram. The present invention especially solves the problem of the utilization of regenerative energy in different power supply zones within the line. By compiling the operation diagram based on historical operation data and dynamically adjusting the actual train operation plan, the maximization of the overlapping period of train operation traction and braking within the line is achieved, thereby realizing the maximization of the utilization of regenerative energy. The present invention can be applied to projects such as urban rail transit, suburban rail transit, and light rail. The purpose of the present invention is to make full use of the regenerative energy generated by train braking to achieve the goal of energy conservation for train operation within the line.

The present invention discloses an elevator control system. The elevator is equipped with an energy storage device that stores regenerative energy generated by the elevator drive motor in a regenerative state and provides it to the elevator drive motor in an electric state. The elevator control system includes: a prediction module for predicting the passenger flow pattern of the elevator; an acquisition module for acquiring movable body information, the movable body information including at least the floor location and mass of the movable body, the movable body being a device that can accept control instructions from the elevator control system to enter or leave the elevator car; a judgment module for determining whether the passenger flow pattern will cause the elevator drive motor to be in a regenerative state; and a control module for generating a first control instruction when the judgment module determines that the control module determines that the control module is in a regenerative state. The elevator control system of the present invention can minimize the cost and size of the storage device while minimizing the elevator's power consumption.

The hydraulic excavator includes: a power take-off (PTO); an engine connected to the PTO; a swing hydraulic pump connected to the PTO and driven by the engine; a swing hydraulic motor driven by hydraulic oil discharged from the swing hydraulic pump; a first main oil passage connecting the first outlet of the swing hydraulic pump to the first inlet of the swing hydraulic motor; a second main oil passage connecting the second outlet of the swing hydraulic pump to the second inlet of the swing hydraulic motor; a neutral holding valve disposed in the first and second main oil passages for controlling the flow of hydraulic oil; a regenerative energy absorption device connected to the PTO and absorbing regenerative energy generated by the hydraulic oil supplied from the swing hydraulic motor to the swing hydraulic pump via the outlet throttling opening of the neutral holding valve; and a valve control unit that controls the area of ​​the outlet throttling opening based on the state of the regenerative energy absorption device.

According to one aspect of the present invention, there is provided a power plant controller for a renewable energy power plant including a plurality of renewable energy generators. The renewable energy farm is connected to a power network. The farm controller is configured to execute machine-readable instructions to: receive a signal indicative of a voltage level of a power network to which the farm is connected; receiving a plurality of signals from the plurality of renewable energy generators, the Good signal indicating a voltage level of the respective renewable energy generator; and for each of the plurality of renewable energy generators, determining a respective reactive power setpoint based on: an indicated voltage level of the power network; an indicated voltage level of the renewable energy generator; and a reference voltage level based on the indicated voltage levels of the plurality of renewable energy generators; and scheduling each determined reactive power setpoint to a respective local controller associated with a respective renewable energy generator for controlling the renewable energy generator.

A servo driver system capable of inputting voltage in a wide range is characterized in that the servo driver system comprises an alternating current-direct current conversion circuit, the input end of a DC-DC voltage-boosting and voltage-regulating circuit is connected with the alternating current-direct current conversion circuit, the input end of an energy consumption braking circuit is connected with the output end of the DC-DC voltage-boosting and voltage-regulating circuit, the direct current-alternating current conversion circuit is connected to the output end of the energy consumption braking circuit, and the direct current-direct current conversion circuit is connected to the output end of the energy consumption braking circuit. And at least one servo driver is connected to the output DC-AC conversion circuit. When a servo driving system with wide-range input voltage is used, a user turns on a power supply, so that alternating current is input to the alternating current-direct current conversion circuit, and a stable voltage level is maintained through the DC-DC buck-boost circuit; when the servo motor slows down or stops, the energy consumption braking circuit consumes regenerated energy, the DC-DC voltage-boosting and voltage-regulating circuit regulates the grid voltage of the MOSFET tube through the error feedback circuit and the system to form a negative feedback closed loop, and the electric energy is stored in combination with an energy storage element on the DC-DC voltage-boosting and voltage-regulating circuit so as to keep the stability of the output voltage.

A method for operating a high-voltage DC-DC converter (1) comprising an intermediate circuit (15) which is coupled via a respective converter stage (14) to at least one vehicle connection (12) for an electrically powered motor vehicle (4) as the device (D) to be supplied, to at least one storage connection (6) for an electrical energy storage device (2) as the device (D) to be supplied, and to at least one source connection (10) for a renewable energy source (3) as the device (D) to be supplied, wherein in the method a control unit (16) for transmitting (7, 11, 13) electrical energy between at least two of the connections (6, 10, 12) controls the respective converter stages (14) of the connections (6, 10, 12), characterized in that a communication interface (8) is provided for each connection (6, 10, 12) and the control unit (16) can be accessed from each connection (6, 10, 12) 10,12) connected device (D) balance data (17), which includes at least one of the following details of the device (D): , Specifies energy demand, power demand, energy supply, and capacity, receives and sets an energy quantity and transmission direction of the electrical energy transferred between the terminals (6, 10, 12) such that an energy balance of the energy exchanged between the devices (D) satisfies a balancing criterion (18) determined on the basis of the balance data (17), wherein the connected energy storage device (2) has a power converter unit (23) through which the energy storage device (2) indirectly obtains additional energy by the energy balance is balanced via the power converter unit (23), via which the energy storage unit (2) is coupled to a building network (24) of a building (5) which is operated on an alternating current basis, and the building network (24) is coupled to a public supply network (25), with which balancing energy (26) is exchanged to balance the energy balance of the control device (16).

An electrical braking system for an electrified vehicle includes a battery system, an electric motor, an electrical energy management module and a controller. The electric motor is powered by the battery system and transfers drive torque to a driveline for propulsion of the vehicle and that selectively directs regenerative power to the battery system during regenerative braking in a first mode. The electrical energy management module has a first energy recovery system that stores additional energy from the regenerative power harnessed from the electric motor in a second mode and a first energy dissipation system that dissipates additional energy from the regenerative power in a third mode. The controller receives an input from a brake pedal indicative of a braking event of the electrified vehicle and, responsive to the input, determines whether to direct the regenerative power in at least one of the first, second and third modes.

The present invention is a system and method for providing a regenerative energy system and method for capturing kinetic energy from wave motion or the relative motion of train cars on tracks to generate electricity, wherein the system uses a hydraulic mechanism coupled to a wave motion capture system or train track components to convert vertical movement into rotational motion, wherein this rotational motion is amplified by a gear reduction assembly, driving one or more generators to produce electrical power. The generated electricity can be utilized in real time by electrical motors, stored in batteries or supercapacitors, or supplied directly to the power grid, wherein the invention integrates hydraulic conversion, motion amplification, and efficient energy transformation to create a durable, scalable system for renewable energy production, and wherein it is designed to harness repetitive, continuous movements, making it applicable for sustainable energy in coastal and transportation infrastructures.

A variable frequency drive (VFD) includes a rectifier, a filter, an inverter, a capacitor bank, and a control circuit. The rectifier converts AC power from a power supply into DC power on a DC bus, which is then filtered. The inverter converts the DC power into three-phase AC power for output to the electric motor. The capacitor bank has one or more capacitors connected to the DC bus. This capacitor bank can store regenerative energy on the inverter's DC bus and supply the stored DC power to the DC bus for conversion back to three-phase AC power to drive the electric motor. The control circuit pre-charges the capacitor bank using AC power from the power supply. The control circuit monitors one or more parameters of the VFD and detects one or more fault conditions associated with the monitored parameters.

In order to improve the accuracy of ascertaining the restriction of regenerative braking in consideration of the relationship between the travel position of a railway vehicle and the regenerative energy that can be provided to an overhead power line, the present invention provides a railway system comprising an on-board system mounted in the railway vehicle and a ground-side system that can communicate with the on-board system. The on-board system transmits vehicle regenerative data, which is data relating to regeneration by the railway vehicle, to the ground-side system. The ground-side system has a regenerative braking restriction database that is constructed by accumulating, on the basis of the vehicle regenerative data received from the on-board system, at least data on a travel section of the railway vehicle and data on the regenerative braking restriction of the railway vehicle.