58results about "Generator control by field variation" patented technology

The application relates to the technical field of electric vehicles, and discloses an electric vehicle range extender amplifier control system and method based on reinforcement learning, the electric vehicle range extender amplifier control system based on reinforcement learning comprises the following steps: acquiring a forward traction demand power and a battery efficiency; calculating an excitation drag energy density; calculating a target range extender power; calculating a target engine rotating speed; calculating a target excitation current; and issuing a command to a power amplifier control. The application identifies the energy source difference in the power output process by constructing the excitation drag energy density feature, provides a decision basis for the range extender control which is in line with the actual energy supply state, synchronously completes the range extender energy supply distribution and excitation adjustment constraint through reinforcement learning, combines the engine rotating speed pre-compensation and the flux suppression logic, reduces the power distortion caused by the rotor kinetic energy release and the battery short-time compensation, and adapts to the daily operation scene demand of the range extender electric vehicle.

The invention relates to a method for controlling an electrical generator of a wind turbine, the generator having a rotor and a stator, the stator being controlled by means of a stator current, the stator current having a main component being characterized by a fundamental signal with a fundamental frequency and a fundamental phase angle and a fractional harmonic current component being characterized by a fractional harmonic signal having a fractional harmonic frequency and a fractional harmonic phase angle, comprising the steps providing a compensation current having a compensation amplitude and a compensation phase angle, and determining the compensation phase angle depending on an absolute rotational position of the rotor.

This invention discloses a method for configuring phase-shifting parameters of a STATCOM controller to suppress subsynchronous resonance, comprising: determining the target generator set to be suppressed by the STATCOM controller, its target torsional vibration mode, and typical operating modes; for each typical operating mode in the set of typical operating modes, using the modal waveform envelope attenuation constant comparison method, calculating the effective range of phase-shifting angles in which the STATCOM controller can provide positive electrical damping for the target torsional vibration mode in electromagnetic transient simulation; performing an intersection operation on the effective ranges of phase-shifting angles of all typical operating modes to obtain a common safe configuration range; selecting phase-shifting angle values ​​from the safe configuration range and configuring them into the damping control channel of the corresponding key shaft torsional vibration mode in the STATCOM controller.

The application discloses a direct-current networking wind generator system and a control method thereof, adopts decentralized and decentralized power generation control, and comprises a wind generator set, a generator controller, an energy storage battery system and a PCS converter; the wind generator set adopts a doubly salient direct-current excitation generator assembly; the generator controller can convert three-phase alternating current output by the doubly salient direct-current excitation generator assembly into high-voltage direct-current shaft voltage through a full-bridge diode rectification filter circuit, and an additional machine end inverter is not needed; each generator controller is connected with one wind generator set, and a plurality of generator controllers are connected in parallel through a direct-current bus. The direct-current voltage output by the doubly salient direct-current excitation generator assembly can automatically follow the common direct-current bus voltage and keep dynamic stability, and will not fluctuate with the dynamic change of the wind turbine speed; the current backflow phenomenon and the crosstalk problem can be effectively avoided, and the wind turbine industry multi-machine direct-current networking demand is perfectly met.

This invention relates to a dual-loop converter for a linear-rotating switched reluctance generator and its control method. The drain of the positive switching transistor of each phase of the rotating generator unit is connected to a first positive circuit, and the source of the negative switching transistor of each phase of the rotating generator unit is connected to a first negative circuit. One end of a load resistor is connected to a first load circuit and a second load circuit connected in parallel, and the other end of the load resistor is connected to a third load circuit and a fourth load circuit connected in parallel. The cathode of the diode of each phase of the rotating generator unit is connected to the first load circuit, and the positive terminal of the winding of each phase of the rotating generator unit is directly connected to the third load circuit. The cathode of the diode of each phase of the DC generator unit is connected to the second load circuit, and the positive terminal of each phase of the DC generator unit is directly connected to the fourth load circuit. This invention solves the technical problems of existing converters using a large number of components and having high line current pressure.

The present application relates to the field of power system control and power electronic energy storage technology, in particular to a generator set transient power compensation system and method thereof, the method comprising: collecting stator voltage, stator current, rotor angular velocity, power angle and DC bus voltage, and mapping into a generalized state vector; constructing a port-controlled Hamilton system model containing an initial interconnection matrix and an initial damping matrix based on preset physical parameters and obtaining a Hamilton energy function; taking partial derivative of the Hamilton energy function with respect to the generalized state vector, calculating an energy gradient vector, dynamically reconstructing a virtual interconnection matrix and a virtual damping matrix, analyzing control input and converting into a duty cycle command to send to an energy storage converter to perform transient power compensation; the system comprises a data acquisition module, a Hamilton energy controller and an energy storage converter; faster transient recovery, lower mechanical stress and more stable closed-loop response can be achieved.

This wind-solar hybrid power converter, incorporating a variable-excitation switched reluctance wind turbine, consists of nine switching transistors, three-phase windings, five diodes, seven capacitors, four inductors, and a photovoltaic cell. The four inductors are coupled in pairs, serving in the coupled power generation of the switched reluctance generator and the photovoltaic cell, as well as in the variable excitation circuit. During the excitation and power generation of the switched reluctance generator, the conversion and output of the photovoltaic cell are integrated, and the output voltage can be directly boosted. To meet the needs of high-speed wind power, variable excitation can be achieved through a buck-boost unit and a switched capacitor unit, enriching the control methods. The entire power converter considers simultaneous wind and solar power generation and supply, separate power generation and supply, and complementary modes, offering high flexibility, high reliability, high utilization, and a common ground without isolation. It is suitable for applications in low-power, high-speed switched reluctance wind turbines and photovoltaic hybrid power generation and power conversion.

The application discloses a double-fed wind power flexible DC transmission system DC overvoltage suppression method and device, and the method comprises the following steps: collecting the DC line voltage of the flexible DC system, calculating the surplus power by using the charging effect of the converter submodule; determining the dynamic voltage reduction coefficient of the wind farm side flexible DC converter station WFMMC according to the surplus power amount; determining the value range of the dynamic voltage reduction coefficient to ensure that the double-fed wind farm enters the low voltage ride-through interval; after the double-fed wind farm enters the low voltage ride-through interval, determining the reduction amount of the power output according to the surplus power amount; and distributing the reduction amount to each wind turbine connected to the AC side of the WFMMC according to the power reduction distribution coefficient; detecting the DC voltage of the wind turbine converter, and if the DC voltage exceeds the action value, the DC voltage of the converter is suppressed. The application effectively suppresses the DC system overvoltage problem from the DC system converter and the double-fed wind turbine generator set side.

The application provides a BLDC energy-saving elevator system and method based on FOC control, comprising an electric module, a mechanical transmission module and a hub module; through optimization of speed regulation and energy feedback mechanism, the energy-saving goal of low cost and high efficiency is realized to meet the urgent needs of current building energy saving. Through precise control of the magnetic field of the BLDC motor, the smoothness of elevator operation and the improvement of energy efficiency are realized; at the same time, the energy is recovered in the elevator descending process and stored in the storage battery for elevator lighting and ventilation and other auxiliary functions, further improving the overall energy utilization efficiency. Through the use of mature BLDC motor technology and FOC control algorithm, combined with reasonable structure design and material selection, the low-cost energy-saving effect is realized. The design not only helps to reduce the production cost, and is easy to popularize and apply on a large scale, and is expected to bring new breakthroughs to the field of building energy saving and promote the development of green building technology.

The full direct current offshore wind power system based on network type direct current fan relates to the field of model construction of full direct current offshore wind power system. The existing full direct current OWP system has the problems of too large volume and weight. The full direct current offshore wind power system based on network type direct current fan and uncontrolled direct current transformer is realized, the uncontrolled direct current transformer (U-DCT) is operated in the open loop control mode of the maximum modulation ratio, the internal alternating current voltage can be maximized, the sub-module capacitor value and conduction loss are reduced, and the economy of the full direct current offshore wind power system is effectively improved; the use weight and installation volume of the capacitor device are greatly reduced; the application of the full direct current offshore wind power system is mainly used in the field of offshore wind power.

This invention provides a regularized CNN-GRU control method based on the physical mechanism of the excitation system in thermal power plants, belonging to the field of excitation control technology. The method mainly includes: constructing an input feature vector and normalizing it; mapping the normalized time-series features to a multi-branch dilated convolutional operator layer composed of multiple sets of parallel operators to generate a global spatial feature vector; feeding the global spatial feature vector into a GRU network embedding a physical consistency gating unit; embedding the second-order rotor motion equation as a gradient constraint factor into the loss function; and linearly superimposing the discretized PID main path output with the network output, generating the final excitation voltage command through a limiting operator. This invention can force the control command to return to the feasible region of physical laws under small sample and strong random disturbance environments, improving the transient damping support efficiency and adaptive control accuracy of the excitation circuit.

The application discloses a double-fed fan subsynchronous oscillation additional damping controller based on capacitor current compensation and relates to the field of novel power system stability analysis and control; solves the problems that the existing controller is relatively complex in determining control parameters, lacks universality and operation parameters cannot be modified at will; comprises a small signal model structure based on double-fed induction fan and weak power grid grid connection, and a general phase lead compensation link controller; phase compensation controller parameters are determined through double-fed induction fan voltage and current frequency response curves; the original system control structure can be not changed, the original control parameters of the system do not need to be adjusted, direct DC current signals are obtained from the DC capacitor part of the double-fed fan, control currents are injected in the form of controlled current sources, the rotor side control and the grid side control are decoupled, and the subsynchronous oscillation phenomenon caused by the interaction between the double-fed fan phase-locked loop and the weak power grid is suppressed.

The application discloses a kind of tractor suction dredger shaft generator digital voltage regulating control method and system, the method includes: establishing and presetting the mapping relationship of shaft generator rated output voltage and main engine speed, matching corresponding excitation parameter, control shaft generator output rated voltage;Preset main engine mud pump combined discharge speed threshold;Collect power grid load change data, and the excitation current is dynamically adjusted based on closed-loop control algorithm by digital voltage regulating module, and voltage fluctuation is inhibited;Make digital voltage regulating system and ship power station management system communication linkage, cooperatively maintain output voltage constant under the condition that main engine speed changes;When double-shaft generator parallel operation, current sharing control and voltage synchronous regulation are executed.The application solves the problem that the output voltage of the shaft generator fluctuates greatly and the response is lagged when the dredger is in the condition of frequent mud pump combined discharge and discharge;The voltage stability, system dynamic response speed, power supply safety and quality under complex operation condition are improved.

The application provides a geothermal power station FCB island operation control method and system, belongs to the technical field of geothermal power station FCB island operation, and the method comprises the following steps: collecting the switch states of the main transformer outlet, the generator outlet and the medium-voltage bus circuit breaker in real time, generating an FCB trigger signal when three conditions are met at the same time, and synchronously sending the FCB trigger signal to a steam discharge circuit, a steam turbine DEH control system and a generator excitation control system through hard wiring; the steam discharge circuit executes front-of-the-machine pressure override control, adjusts the valve opening degree based on the pressure deviation and the change rate; the excitation system executes voltage-frequency cross compensation closed-loop control; the DEH system quickly sheds load to auxiliary power load, switches the primary frequency modulation mode to maintain frequency stability. The application is suitable for the characteristics of the geothermal power station, improves the unit operation stability under the FCB working condition, and guarantees the safe island operation of the unit when the power grid fails.

Disclosed in the present invention are an excitation circuit, an excitation small-current test method, and an electronic device. The excitation circuit includes a test power supply, an excitation small-current tester, a thyristor rectifier bridge, and an excitation regulator. The excitation small-current tester includes: a switch, a voltage regulator, a current transformer, a voltage transformer, an industrial controller, an oscilloscope, a resistive load and a shunt. The industrial controller is added to the excitation small-current tester, which reduces the wiring complexity of the excitation current test; it can display an anode three-phase voltage, an anode three-phase current, an excitation current, and an excitation voltage of the thyristor rectifier bridge that are received, and by using these data, the industrial controller can directly complete the relevant calculation in the excitation current test process, which improves the efficiency and reduces the complexity of the calculation process.

The application provides a locomotive power supply control method and device based on sensorless speed estimation, which comprises the following steps: establishing a first DC bus through battery boosting, forming a second DC bus after boosting, estimating the locomotive motor speed in real time based on a sensorless speed estimation algorithm, enabling battery power supply if the speed does not reach a threshold, exciting and controlling the traction motor at a constant voltage if the speed reaches the standard, generating electricity through SVPWM modulation driving an inverter, reducing the second DC bus to the first DC bus, and inversely converting the first DC bus into single-phase alternating current output. The application solves the technical problem of the risk of main system interference caused by modifying the locomotive traction converter software in the prior art.

An electrically excited synchronous machine (1) has a stator (2) with a stator winding (3) and a rotor (5) with an excitation winding (6). A control unit (9) of the synchronous machine (1) operates the synchronous machine (1) with a torque (M) that is high during load phases (12) and considerably lower during load breaks (13) between load phases (12). The control unit (9) rotates the rotor (5) during the load phases (12) with a uniform direction of rotation for each load phase (12) and at a speed (n) above a minimum speed (nmin). Based on the rotational position (p) of the rotor (5), the control unit (9) determines a d-coordinate and a q-coordinate of a coordinate system defined by the rotational position (p) of the rotor (5). The d-coordinate corresponds to the direction of a flux caused by an excitation current (le) flowing in the excitation winding (6).The q-coordinate is oriented orthogonally to the d-coordinate in the coordinate system. Before a load phase (12), during the load break (13), the control unit (9) sets a q-current (Iq) to an initial value (Iqa). During the load phase (12), the control unit (9) regulates the q-current (Iq) to a maximum of twice the initial value (Iqa). At the latest at the beginning of the respective load phase (12), the control unit (9) activates a controller (17) which adjusts the d-current (Id) and the excitation current (le) during the respective load phase (12), but not the q-current (Iq). The tracking is carried out in such a way that an actual value (x) of the rotor (5) remains equal to a corresponding target value (x*) and the d-current (Id) and the excitation current (le) satisfy the relationship Id=−u¨⋅Ie+FXh⋅cosα.

The application discloses a control method, device and system of a direct-current wind turbine generator set. The method comprises the following steps: monitoring the direct-current port voltage and the rotor speed of each wind turbine generator in real time; when there is a first target wind turbine generator whose direct-current port voltage exceeds a preset voltage threshold and whose rotor speed exceeds a preset speed threshold, performing output amplitude limiting control on the first target wind turbine generator, so that the direct-current port voltage is stabilized within a preset voltage range, wherein the output amplitude limiting control comprises controlling a variable pitch mechanism to perform a pitch-in action and controlling a wind turbine side converter to limit output power. The scheme provided in the application can improve the stability of a direct-current power transmission system.

This invention relates to the field of switched reluctance generator (SMR) technology, specifically to a two-stage phase current modulation method for SMRs based on voltage balance, comprising the following steps: S1, modeling the relationship between the moving electromotive force and the demagnetizing voltage; S2, designing the phase current mode switching criterion; S3, current chopping control during the excitation stage; S4, voltage balance modulation during the generation stage; S5, tuning the dual closed-loop control parameters; S6, configuring initial parameters for efficiency optimization; S7, dynamically constructing the optimization interval; S8, dynamically verifying mode switching; and S9, adapting system integration parameters. This invention establishes a quantitative model of the moving electromotive force and the demagnetizing voltage and derives an analytical expression for the duty cycle, achieving calculable and constrained control of the duty cycle D. This provides a precise basis for voltage balance modulation, thereby improving modulation accuracy and adaptability to operating conditions, and reducing errors and instabilities caused by empirical settings.

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.

The application discloses a voltage establishment compensation control method and system for an aviation starting generator, and belongs to the technical field of motor control. The application analyzes parameters that determine the dynamic characteristics of voltage establishment, and designs a voltage establishment control strategy considering the parameters. The control strategy firstly calculates the maximum available power in the voltage establishment process of the starting generator under the premise of considering the influence of copper loss; then, based on dynamic safety constraints and the maximum available power, the optimal instantaneous voltage establishment rate of the starting generator is calculated, and the maximum voltage change of the starting generator is determined; finally, based on the maximum voltage change, the reference voltage value of the current starting generator is calculated, so that the voltage rate compensation of the voltage establishment process is realized. The application can maximize the voltage establishment rate under the premise of ensuring the safety margin, realize fast and stable voltage establishment, and is suitable for multi-working-condition change scenes in a wide speed range.

The application provides a water turbine generator excitation parameter adjustment method and system based on working condition recognition, belongs to the technical field of water turbine generator excitation control, and can at least partially solve the problems that the existing control mode is difficult to adapt to the frequent change of the working condition of the water turbine generator, lacks an effective recognition mechanism for the working condition, and is difficult to realize self-adaptive adjustment of the excitation parameter under multiple working conditions. The application comprises the following steps: running state data acquisition; working condition recognition; working condition determination confirmation; working condition-excitation parameter mapping and matching; and online self-adaptive adjustment of the excitation parameter. The application can accurately recognize multiple working conditions of the water turbine generator in real time by collecting the running state data of the water turbine generator and recognizing the working condition, thereby establishing a systematic mapping relationship between the working condition and the excitation parameter, realizing self-adaptive adjustment of the excitation system, and improving the dynamic performance and adaptability of the water turbine generator in a complex power system environment.

To provide a control device of a rotating electrical machine that controls regenerative torque to 0 when torque command value is 0, and can accurately control regenerative torque to a torque command value when the torque command value changes from 0.SOLUTION: A control device of a rotating electrical machine calculates a current command value of a field winding corresponding to a current torque command value and a current specific operating state variable by referring to map data with the torque command value and the specific operating state variables as a map axis and the current command value of the field winding as map setting data, and sets current command value data for 0 torque command value increments at each of multiple increments of a specific operating state variable, in which 0 torque command value increments are provided, to a current at which power generation starts in the field winding, where rectified power generation begins by rectifying the induced voltage in the inverter and supplying it to the DC power supply.SELECTED DRAWING: Figure 3

A kind of high-voltage switch reluctance generator power converter and its control method, power converter is composed of ten switch tubes, six inductors, three-phase winding, seven capacitors and eight diodes, and it is specifically divided into main circuit for each phase winding excitation and power generation and variable excitation circuit for realizing variable excitation voltage by feedback power generation energy;Directly realize high-voltage output in excitation and power generation process, the excitation power in the loop also participates in the power generation stage, and then can directly generate control effect in the power generation stage, and when the power generation voltage is too low, there is a loop that increases instantaneous output in excitation and power generation stage;By setting the ratio of two pairs of coupled inductors, and the constraint of the ninth switch tube and the tenth switch tube, the excitation voltage change can be adjusted while realizing overall voltage reduction;The whole power converter has no isolation transformer;It is suitable for small power variable speed wind driven high-speed switch reluctance generator system field application in direct current microgrid.

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 provides a composite magnetic line, etc., that can stabilize the amount of electricity generated in power generation utilizing the Great Barkhausen effect. [Solution] The composite magnetic wire 110 comprises a core material 111 made of a non-magnetic material and a cylindrical magnetic member 112 made of a magnetic material that produces a large Barkhausen effect in response to changes in an external magnetic field, and which has a cylindrical shape that covers the core material 111. The cylindrical magnetic member 112 is continuous without interruption around the entire circumference of the core material 111.

The application discloses a kind of excitation system multi-mode starting control loop and method, the control loop includes: synchronous generator G, electric brake circuit, excitation starting circuit, the electric brake circuit includes electric brake power supply, electric brake transformer ZDB, electric brake alternating current circuit breaker S103, rectifier bridge SCR and direct current magnetic field circuit breaker S101, the electric brake power supply is connected to electric brake alternating current circuit breaker S103 by electric brake transformer ZDB, then to rectifier bridge SCR;The direct current that the rectifier bridge SCR rectifies after output is connected to the rotor of synchronous generator G through direct current magnetic field circuit breaker S101;The excitation starting circuit includes AC excitation power supply, diode rectifier bridge, excitation contactor K1, fuse F01 and F02;The application guarantees the success rate of each mode starting for the first time, and eliminates the hidden trouble brought by temporary change of external loop for test under test mode.

This application discloses a collaborative control method for an excitation system compatible with both generator and synchronous condenser operating conditions. By decoupling and reconstructing electromechanical sensor data and performing pattern recognition, it captures the time-varying inertial parameters of the unit during operating condition transitions in real time. Based on this, a state-space observation mechanism based on flux linkage continuity prediction is constructed, directly transforming the evolution of the system's inertial boundary into feedforward compensation voltage. This collaborative control strategy, by introducing dynamic time-varying inertia as a compensation benchmark, can overcome the adjustment dead zone of traditional proportional-integral converters, directionally eliminating flux linkage deviations within milliseconds and effectively suppressing transient reactive power drops. The resulting smooth switching not only significantly improves the control robustness of the excitation system under extreme transient conditions but also fundamentally avoids actuator saturation risks and shaft derailment shutdown hazards, greatly enhancing the voltage disturbance rejection capability of synchronous units in new power systems.