19 results about "Permanent magnet synchronous generator" patented technology

This invention discloses a maximum power point tracking (MPPT) control system and method for a pump-driven turbine power generation system. It calculates output power by acquiring DC-side voltage and current, and also acquires rotational speed. Within each MPPT cycle, the operating state is identified by the power-speed slope feature G: when operating conditions change rapidly, the weight of the disturbance observation branch is increased; when approaching the maximum power point, the weight of the adaptive scale fuzzy logic control branch is enhanced. The two branches achieve branch current fusion according to the weights constructed using (|G|), outputting the q-axis stator current increment. A dq current closed loop is used to output a PWM drive signal to control the machine-side converter, adjusting the electromagnetic torque of the permanent magnet synchronous generator, thereby achieving efficient MPPT under time-varying head / flow conditions. This invention relies only on measurable power and speed signals, requiring no precise hydraulic model or data-intensive training, resulting in low computational load, ease of embedded implementation, improved energy recovery efficiency, and suppression of power fluctuations and torque pulsations.

The application discloses a kind of model construction method and device of wind power generation system, the method wind power generation system, at least including wind turbine and permanent magnet synchronous generator, the method includes: the mechanical characteristics of wind turbine is modeled according to momentum theory data to obtain wind turbine model;Maximum power output point of wind turbine is tracked by analyzing wind turbine model and using hill climbing search method;Ideal conditions met by permanent magnet synchronous generator are obtained;Under ideal conditions, three-phase voltage equation under natural coordinate system, flux linkage equation under natural coordinate system, electromagnetic torque equation of motor, mechanical motion equation of permanent magnet synchronous generator are established to obtain permanent magnet synchronous motor model.The application can reduce the loss generated by mechanical rotation in power generation process, so that the power generation efficiency of system is higher.

The application relates to the field of wind power generation technology and provides a permanent magnet synchronous generator and a high-altitude wind power generation system.The permanent magnet synchronous generator comprises a rotor and a stator; the rotor is provided with permanent magnets; the stator is coaxially sleeved outside the rotor and comprises a plurality of stator modules; the plurality of stator modules are arranged along the circumference of the rotor; each stator module constitutes an independent three-phase power generation unit and has an independent neutral point; the stator module comprises a shell, a stator core and three-phase windings; the stator core is connected with the shell; the stator core is formed with a plurality of installation grooves which are arranged at intervals along the circumference of the rotor; and the three-phase windings are installed in the installation grooves; the three-phase windings of each stator module adopt a single-layer concentrated winding structure; each phase winding in the three-phase windings is contained in two adjacent installation grooves in the stator module; and only the winding of a single phase is contained in each installation groove. The application reduces the weight of the permanent magnet synchronous generator, thereby realizing long-time stable power generation.

This invention discloses a modeling and application method for a state-space small-signal model of a direct-drive permanent magnet wind power grid-connected system under AC asymmetric operating conditions. The modeling method includes establishing mathematical models of each core component of the direct-drive permanent magnet wind power grid-connected system; converting the mathematical models of the AC-DC-AC power converter and filter circuit to obtain the corresponding dq-sequence dynamic phasor models; processing the mathematical models of the wind turbine shaft system, permanent magnet synchronous generator, phase-locked loop, and turbine-side converter control system at the steady-state operating point to obtain a linear time-invariant model; processing the mathematical models of the phase sequence separation stage, grid-side converter control system, and the dq-sequence dynamic phasor model to obtain a linear periodic time-varying model; and integrating the linear time-invariant model and the linear periodic time-varying model to obtain the state-space small-signal model. The state-space small-signal model obtained by this invention can accurately and completely characterize the small-disturbance characteristics of a direct-drive permanent magnet wind power grid-connected system under AC asymmetric operating conditions.

This application discloses a voltage control method and apparatus for a permanent magnet synchronous generator based on active disturbance rejection control (ADRC), relating to the field of permanent magnet generators. The method includes: constructing a first extended state observer; adjusting the derivative of the observed values ​​according to the error between the state variables and their corresponding observed values, and constructing a second extended state observer based on the first extended state observer; constructing a disturbance observer based on a second-order linear model, and compensating the disturbance observed by the disturbance observer to the second extended state observer using a compensation model to obtain a third extended state observer; and obtaining the control law for the q-axis current based on the third extended state observer. This method improves the extended state observer by addressing the error between each state variable and its observed values, effectively enhancing the system's dynamic performance. Furthermore, by using an additional disturbance observer to observe system disturbances and compensate them for by the extended state observer, the disturbance estimation burden on the extended state observer is reduced, improving the estimation accuracy.

The application provides a green offshore pumped storage energy, phase modulation and power generation system, which comprises a wind turbine or a wind turbine group, an offshore water tower, a water turbine, an excitation or permanent magnet synchronous generator and a water pumping pump, the excitation or permanent magnet synchronous generator is located in the offshore water tower, the wind turbine or the wind turbine group is located at the top of the offshore water tower or is distributed around the offshore water tower, the vertical excitation or permanent magnet synchronous generator is coaxially connected with the water turbine, a lower water outlet with a volute is arranged in the offshore water tower, a water storage tank is arranged above the offshore water tower, a tower water chamber, a tower water outlet channel, a sea outlet, a water inlet and corresponding valves and related circuit structures are arranged below the offshore water tower. The system can realize a novel offshore energy utilization, integrates offshore pumped storage energy, offshore power generation and offshore phase modulation into a unified structure, takes into account the operation state of the land power grid, fully utilizes offshore resources and improves the utilization rate of wind power generation.

The present application relates to the technical field of electric vehicle range extending power generation, in particular to an intelligent circulating range extending power generation method for electric vehicles, which generates power by driving a permanent magnet synchronous generator with a driving motor of an electric vehicle, outputs 12V-36V direct current, and after voltage stabilization by a module voltage stabilizer, intelligent control by a programmable controller, and precise voltage increase by a direct current step-up transformer, outputs direct current voltage matching the battery or driving system of the electric vehicle, and selectively supplies power to the battery or directly to the driving system through a two-way switching switch, forming a closed loop cycle of power generation, processing and supply. The method continuously generates power when the electric vehicle is running or idling, without the need for external charging equipment, effectively improving the driving range; the controller monitors the voltage in real time and has overvoltage protection and fault self-detection functions, the step-up transformer adjusts the output voltage steplessly, and is suitable for electric vehicles of different voltage grades; the whole is integrated conveniently, stable in operation, and high in power conversion efficiency; the present application is suitable for various electric two-wheeled, three-wheeled and four-wheeled vehicles.

This invention proposes a method and system for real-time prediction of the electromagnetic state of a permanent magnet synchronous generator (PMSG), belonging to the technical field of real-time prediction of the electromagnetic state of PMSG. The method includes: real-time measurement of the rotor speed, rotor position angle, and three-phase winding current of the PMSG; conditioning and converting the real-time measured signals to obtain a processed operating condition vector; acquiring a pre-trained model; and inputting the real-time pre-processed operating condition vector into the pre-trained model for forward propagation, simultaneously obtaining high-dimensional electromagnetic field quantities and electromagnetic scalars within milliseconds.

The invention discloses a permanent magnet synchronous generator MPCC control method and system. The method comprises the steps that output data of a permanent magnet synchronous generator are collected; establishing a system time domain equation, and preprocessing the system time domain equation according to the output data to obtain a system model prediction equation; correcting an error of an actual control system based on the system model prediction equation; and performing rolling optimization on the error corresponding to each voltage vector by using a value function based on a current error to obtain an optimal switching vector which minimizes the value function, and acting the optimal switching vector on a machine side rectifier to complete control on the permanent magnet synchronous generator. The method has better dynamic response characteristics and anti-interference performance.

This invention provides a mechanical electric energy storage device for rail trains utilizing braking force, comprising an open outer shell of the main body, a driven wheel rotatably connected to the inner side of the open outer shell, a flywheel rotor fixedly connected to the upper end of a second transmission shaft, a magnetic levitation bearing sleeved on the flywheel rotor, clutch bushings sleeved and slidably connected at corresponding positions between the first and second transmission shafts and between the first and third transmission shafts, a speed-changing gearbox fixedly connected to the lower end of the inner side of the open outer shell, and a permanent magnet synchronous generator fixedly connected to the lower end of the inner side of the open outer shell. This device can achieve efficient recovery and stable conversion of train braking kinetic energy, effectively reducing energy waste and tunnel temperature rise caused by traditional resistance braking, while also reducing the wear rate of brake pads, thereby improving the energy utilization efficiency and operation and maintenance efficiency of rail trains.

A method and apparatus for optimizing control parameters of a permanent magnet synchronous generator, relating to the field of power device maintenance. The method comprises: performing impedance modeling on a permanent magnet synchronous generator on the basis of a topology structure and a control structure of the permanent magnet synchronous generator, and analyzing impedance characteristics (S101); establishing a generator transient reactive power-voltage model on the basis of dynamic response characteristics of a phase-locked loop, and analyzing the effect of controller bandwidth and damping-ratio parameters on transient characteristics (S102); and optimizing control parameters of the permanent magnet synchronous generator on the basis of the impedance characteristics and the transient characteristics (S103). The method can optimize control parameters of a permanent magnet synchronous generator by taking into account both impedance characteristics and fault ride-through characteristics of the permanent magnet synchronous generator.

This invention relates to the field of liquefied carbon dioxide energy storage and power generation equipment, and discloses a magnetically levitated high-speed expander generator for liquefied carbon dioxide energy storage, including a base plate. The base plate is equipped with a magnetically levitated high-speed expander unit, a permanent magnet synchronous generator, a magnetically levitated control system, a working fluid circulation system, a sealing and insulation system, and an auxiliary monitoring system. The magnetically levitated high-speed expander unit is used to expand the carbon dioxide working fluid to perform work. The permanent magnet synchronous generator is used to convert the mechanical energy of the rotor of the magnetically levitated high-speed expander unit into electrical energy, achieving high energy conversion efficiency and low operating losses. Magneticly levitated bearings are used instead of traditional mechanical bearings, reducing frictional losses and improving the overall energy conversion efficiency of the expander-generator combination. The high-speed rotor and the generator rotor are directly and rigidly connected, eliminating coupling transmission losses and further improving efficiency. Simultaneously, the impeller adopts a three-dimensional aerodynamic optimization design, resulting in high expansion efficiency and high working fluid energy utilization.

This invention discloses a method and system for improving the stability of vehicle-mounted three-phase AC variable-speed constant-frequency power generation. First, the engine drives a permanent magnet synchronous generator (PMSG) to rotate, and the PMSG outputs variable-frequency and variable-voltage three-phase AC power. Simultaneously, a rotary transformer is used to detect the rotor position of the PMSG, obtaining first detection data. This first detection data is then decoded and fed back to the rectifier control unit. This invention decouples the three-phase active current i from the three-phase load current by using a transformation from a three-phase stationary to a two-phase rotating coordinate system in the phase angle of the three-phase command voltage on the inverter side. dfac With three-phase reactive current i qfac Then, both are fed back to the i in the rectifier-side SVPWM control. d and i q In the loop, a current loop feedforward is constructed on the rectifier side, thereby suppressing the fluctuation of DC side voltage when the AC load current changes abruptly, thus improving the stability of the DC bus voltage on the rectifier side, preventing inverter failure of the power generation system, and making it suitable for widespread promotion and use.

A device for wind turbine primary frequency modulation, including machine side converter and grid side converter, one side of the machine side converter is electrically connected with the grid side converter, the other side of the machine side converter is electrically connected with the permanent magnet synchronous generator, the input shaft of the permanent magnet synchronous generator is connected with the rotating shaft of the wind turbine, the air pressure energy storage unit includes energy storage side converter, air compressor, small steam turbine generator and gas tank. Through the cooperation between the power grid, servo motor, piston, rotating disc and energy storage side converter, the current of wind power is transmitted to the power grid through the machine side converter, and the current generated by high pressure gas energy storage is transmitted to the power grid through the energy storage side converter, so as to realize the frequency modulation process, effectively avoid the problem that the current flywheel energy storage technology is not very mature, and the flywheel is usually made of carbon fiber material, which is not suitable for the large range and large quantity of wind turbine use requirements from the processing difficulty and cost.

The application discloses a permanent magnet synchronous generator system power following system and a control method thereof, and relates to the technical field of power generation control. The method comprises the following steps: 1, obtaining the maximum current of the current power battery charging current and the power consumption of the load system, respectively; calculating the discharging current of the power battery according to the DC side voltage obtained by current sampling, and adding the maximum current of the current power battery charging current to the discharging current to obtain the actual charging current instruction; 2, sampling the actual charging current of the power battery, namely the load current. The power following control method provided by the application can dynamically adjust the charging power and the charging current of the power battery according to the temperature and the state of charge of the power battery and the actual power consumption demand of the load system, improves the charging speed of the power battery under the premise of ensuring safety, and does not need the intervention of the vehicle controller, thereby simplifying the complexity of the vehicle control.

This invention discloses a control method for a dual three-phase permanent magnet synchronous generator (DTP-PMSG) rectifier system. By modeling the dual three-phase permanent magnet synchronous generator, vector control is performed on the DTP-PMSG rectifier system. A sliding mode observer based on an adaptive superspiral algorithm replaces the traditional sliding mode observer to estimate the motor back electromotive force and rotor position. This method suppresses the high-frequency chattering problem caused by the traditional sliding mode observer using a sign function as the control function, improving the observation accuracy of the rotor angle position. Furthermore, it ensures that the DC output provides stable DC power to the load. Simulation results verify the effectiveness of the proposed control scheme based on the adaptive superspiral algorithm sliding mode observer.

This invention relates to the field of power generation technology, specifically to a hydrodynamic power generation device for fixed river equipment, comprising: a power management and communication control component; a navigation buoy, wherein the power management and communication control component is fixedly connected to the upper end of the navigation buoy; two mounting plates, both fixedly connected to the side walls of the navigation buoy; a connecting pipe, which is fixedly connected through the side walls of the two mounting plates; a three-section waterproof generator, wherein the lower end of the connecting pipe is fixedly connected through the interior of the three-section waterproof generator; and multiple disc-type coreless permanent magnet synchronous generators. In this invention, the axial flow impeller adopts a lightweight aluminum alloy material and a low-inertia fan blade design, combined with an array layout of multiple small-power disc-type coreless permanent magnet synchronous generators, reducing the overall starting torque of the system. Simultaneously, the disc-type coreless permanent magnet synchronous generators employ a printed coil stator and a radially magnetized permanent magnet rotor, effectively reducing cogging torque and eddy current losses.

The invention discloses an energy conversion method based on a hydraulic energy storage type wave energy power generation unit. The method comprises the steps that a wave absorbing floating body is used for sensing up-down fluctuation of external waves and acts along with the waves; swing of the floating body is converted into reciprocating motion of the double-return-stroke hydraulic rod through the hydraulic system. Hydraulic oil is driven to be pumped into the energy accumulator through reciprocating motion of the hydraulic rod, and energy is stored. Along with continuous pumping of the hydraulic oil, the pressure of the energy accumulator is gradually increased; when the pressure of the energy accumulator reaches the preset opening pressure, the hydraulic autonomous control system is started; after the control system is started, the hydraulic motor starts to rotate under the pushing of the high-pressure hydraulic oil; the rotation of the hydraulic motor drives the permanent magnet synchronous generator to rotate; alternating current output by the permanent magnet synchronous generator is converted into stable direct current through a rectification link; and the stable direct current is collected to an intermediate direct current bus. Wave energy can be fully utilized to improve the energy conversion efficiency of the device.

The application provides a generator system based on a high-frequency isolation matrix converter and a regulation method, and relates to the field of power generation, power transformation or power distribution.The generator system based on the high-frequency isolation matrix converter comprises a permanent magnet synchronous generator, a high-frequency matrix converter, a center-tapped high-frequency matrix transformer and a full-bridge converter, an output port of the permanent magnet synchronous generator is connected with the high-frequency matrix converter in the next stage, three-phase input of the high-frequency matrix converter is connected with the permanent magnet synchronous generator, the most common voltage source type device on the market is used, the cost and reliability of the device are ensured, the existing device common drain or common source connection is not needed, the additional conduction resistance of the device series connection is reduced, a complex multi-step commutation method is not needed, the simplified commutation strategy can omit the additional controller cost, the commutation failure probability is reduced, and the reliability of the system is enhanced.