280results about "Synchronous generator control" patented technology

The invention discloses a DFIG grid-side converter control parameter multi-target step-by-step identification method based on RT-LAB, and belongs to the technical field of doubly-fed induction generator grid-side converter control. The method comprises the steps that a DFIG grid-side converter identification model is built, an off-line model is created through MATLAB / Simulink, an RT-LAB platform is embedded, subsystems are divided, and a synchronous communication module is added; feature selection and importance evaluation are carried out, and LASSO regression is adopted to screen key features; analyzing the correlation degree through a Spearman grade correlation coefficient, and determining a high-correlation-degree observed quantity and a step-by-step identification sequence; and establishing a multi-objective optimization model by using an MOEA / D algorithm based on the screening result, and processing a plurality of optimization objectives to find an optimal tradeoff solution. According to the DFIG grid-side converter control parameter multi-target step-by-step identification method based on RT-LAB, the defects of a traditional method are overcome, the accuracy of the control parameters is improved, the system stability and reliability are enhanced, the cost and risk are reduced, the energy utilization efficiency is improved, and powerful support is provided for efficient operation of a power generation system.

The invention discloses a virtual synchronous generator pre-synchronization control method based on adaptive virtual torque compensation. The method comprises the following steps: establishing a control equation of a virtual generator of an energy storage converter; self-adaptive virtual torque and self-adaptive virtual electromotive force compensation quantity are added into the virtual synchronous generator control equation, and an improved virtual synchronous generator control equation based on self-adaptive virtual torque compensation is obtained; calculating to obtain the compensation amount of the adaptive virtual torque and the adaptive virtual electromotive force; in the off-grid mode, the output voltage of the energy storage converter and the voltage of the power grid are input into the self-adaptive virtual torque compensation controller, the compensation amount of the self-adaptive virtual torque and the compensation amount of the self-adaptive virtual electromotive force are output and compensated to a virtual synchronous generator control equation of the energy storage converter, and therefore synchronization of the voltage of the power grid is achieved. The output voltage amplitude and the voltage phase of the converter can be quickly adjusted only by collecting the output voltage of the converter and the voltage of the power grid, and the effect of smooth grid connection of the converter is achieved.

The present invention discloses a charging and discharging control method and system for an electric vehicle based on virtual synchronization, and relates to the technical field of virtual synchronization. The method includes: establishing connection between a power grid and the electric vehicle, and acquiring a charging and discharging operation demand; acquiring, according to the charging and discharging operation demand, a corresponding control instruction and constraint condition, and executing a charging and discharging operation; and providing a human-computer interaction interface for measuring and settling charging and discharging energy, along with authentication. The present invention achieves efficient and coordinated charging and discharging control, precise measurement and convenient authentication, and improves availability and reliability of the system.

The invention provides a wind generating set, a differential speed regulation device and a control method thereof, the wind generating set comprises the differential speed regulation device, a multi-port converter and an electro-magnetic synchronous generator, and the differential speed regulation device comprises a permanent magnet motor, a differential planetary gear train, a quasi planetary gear train and a speed regulation motor. A permanent magnet motor rotor is connected with a differential planetary gear train planet carrier, and a speed regulating motor rotor is connected with a quasi planetary gear train sun gear. The differential planetary gear train sun gear drives the electro-magnetic synchronous generator rotor to operate at a first preset rotating speed. One port of the multi-port converter is connected with the permanent magnet motor stator, one port is connected with the speed regulation motor stator, and the other port is connected with the electro-magnetic synchronous generator rotor through the slip ring. According to the differential speed regulation device, variable-speed input, self-energized speed regulation and constant-speed output are achieved, and the differential speed regulation device is compact in overall structure, small in size and light in weight; the black start can be realized without taking power from a power grid; and the electro-magnetic synchronous generator is directly connected to the grid, so that the power grid supporting capacity is high.

The invention discloses a VSG transient stability control method based on PSS power angle compensation and integral reactive loop cooperation, and the method comprises the steps: constructing an improved rotor motion equation compensation mechanism based on a power system stabilizer, and based on the dynamic parameters of the voltages vabc and pcc at a PCC point and the currents iabc and pcc flowing into the PCC point which are collected in real time, carrying out the compensation of the current iabc and pcc at the PCC point under the condition that the working condition is that the voltage of a power grid drops greatly. The dynamic characteristic of active power is ensured; constructing a PSS parameter optimization method based on zero point position constraint; an integral link is embedded in the traditional voltage-reactive droop characteristic, integral reactive loop control is constructed, and steady-state voltage deviation is eliminated; the output compensation power angle delta and the output voltage amplitude E are cooperatively applied and converted into dq-axis voltage components Ed and Eq, the dq-axis voltage components Ed and Eq are sent to a voltage and current double closed loop, a driving signal is generated through SVPWM, and the stability of the system is enhanced.

The invention provides a self-adaptive state prediction control method for improving the stability of a grid-forming type new energy shafting, and belongs to the technical field of wind power generation, and the method comprises the steps: determining an extended state observer based on a nonlinear function and a closed-loop system; obtaining a virtual torque compensation item by using the extended state observer, and feeding back the virtual torque compensation item to a virtual rotor motion equation of the virtual synchronous machine to perform additional power compensation; in the additional power compensation process, when the rotating speed of the draught fan is lower than a preset safety value, proportional integral differential control is set to zero through a rotating speed protection module, the wind power virtual synchronous machine system is controlled to exit additional power compensation, and the active supporting system is controlled to operate stably; in the stable operation process of the active support system, the rotating speed of the fan is recovered to the optimal value through the rotating speed recovery module, and the influence caused by unreasonable parameters is reduced and the dynamic stability of the wind power VSG grid-connected system is effectively enhanced by estimating the imbalance between the external disturbance power and the internal state quantity and performing tracking compensation in the controller.

The invention discloses a wind power plant equivalent virtual inertia identification method based on symbol regression, and relates to the technical field of novel power system frequency safety and stability, and the method comprises the steps: S1, building a doubly-fed fan inertia response dynamic mechanism model containing comprehensive inertia control; according to the method, the problems of lack of physical mechanisms, poor evaluation interpretability and the like of an equivalent virtual inertia evaluation method for a current wind power plant are solved, the method is based on system operation data and is associated with an inertia response dynamic mechanism model, and the interpretability of a system physical process is reserved; a sparse dynamic modeling method is adopted, an input-output linear combination feature library of system electromagnetic torque-rotor rotating speed change is constructed, sparse solution of parameters is achieved through a sequence threshold value least square algorithm, and the equivalent virtual inertia of the wind power plant is obtained through evaluation. According to the method, model priori knowledge and operation data are fully applied, and the evaluation result is high in accuracy and high in interpretability.

The invention discloses a multi-strategy collaborative broadband oscillation uniform suppression method for a wind power flexible low-frequency grid-connected system. The method comprises the following steps: 1, establishing a wind power flexible low-frequency grid-connected system state space model under different installation positions and different broadband oscillation suppression strategies; 2, a broadband oscillation suppression strategy installation position under non-target frequency band damping constraint is obtained; and 3, selecting a multi-strategy collaborative broadband oscillation uniform suppression strategy type. The invention provides a multi-strategy collaborative broadband oscillation uniform suppression strategy by considering the problems that non-target frequency band damping is possibly deteriorated and the system is unstable while the target frequency band damping of a wind power flexible low-frequency grid-connected system is improved by the broadband oscillation suppression strategy. After the broadband oscillation suppression strategy is added, any frequency band has uniform positive damping, the stability margin of the wind power flexible low-frequency grid-connected system is improved from the broadband range, and the problem of system instability caused by non-target frequency band damping deterioration is avoided.

The invention discloses a negative sequence control-based control method for a grid-side converter of a grid-forming type permanent magnet synchronous motor, and relates to the technical field of virtual synchronous machine control. According to the method, permanent magnet synchronous motor network side control under the unbalanced weak power grid condition is divided into network construction type control, positive sequence double-closed-loop control and negative sequence closed-loop control, cooperative compensation control is added to the positive sequence double-closed-loop control, and corresponding positive sequence voltage and current components are compensated according to the power grid unbalance degree. Aiming at the problem that the existing permanent magnet synchronous motor control technology is difficult to realize stable operation under the unbalanced weak power grid, a negative sequence control mode is combined with a network construction mode, a cooperative compensation control mode is added, a negative sequence current component can be effectively inhibited, the stability of the permanent magnet synchronous motor under the unbalanced weak power grid is greatly improved, and the stability of the permanent magnet synchronous motor under the unbalanced weak power grid is improved. And stable operation under a severe power grid condition is realized.

The invention relates to a wireless power transmission-based synchronous motor excitation system for an aero-engine, which belongs to the technical field of wireless power transmission synchronous motor excitation, and comprises a power supply, an inversion module, a metal eddy current resonance compensation network, a passive rectification module and an excitation module, on one hand, a synchronous motor excitation system suitable for wireless electric energy transmission of an engine rotating part is designed and arranged in an aero-engine, power transmission from a power source to a load can be completed without physical connection, the reliability problem of friction of a contact structure is solved, and the structure is simple; on the other hand, a metal eddy current resonance compensation network is introduced into a coupling mechanism of a transmitting end coil and a receiving end coil for wireless electric energy transmission, so that the excitation system of the synchronous motor is in a resonance state, and the compensation inductance and capacitance of the aero-engine under the consideration of the metal eddy current influence can be obtained; and resonance compensation under the influence of the metal eddy current is further realized.

The present invention relates to a coordinated control method and system of a permanent magnet synchronous generator based on load mutation, and relates to the field of intelligent control technology, including: using sensors to continuously monitor the load condition of the permanent magnet synchronous generator, and collecting the load current, voltage and power factor in real time; comparing the load current, voltage and power factor with the preset safe operation threshold, and triggering an alarm if a mutation exceeding the threshold is detected; in response, activating a PID controller to switch it from a standby state to a working state; the PID controller calculates the adjustment amount through the operation of the three links of proportion, integration and differentiation according to the deviation between the collected real-time data and the set value; according to the adjustment amount, dynamically adjusting the excitation current of the permanent magnet synchronous generator, and adjusting the output power of the generator according to the real-time demand of the power system. The present invention can make an accurate response within milliseconds, and effectively improves the dynamic performance of the generator.

The invention relates to a control method and device of an intelligent excitation system, computer equipment and a storage medium. The method comprises the following steps: acquiring real-time operation data of each candidate control cabinet in the intelligent excitation system; the candidate control cabinets comprise at least two power cabinets and field suppression cabinets; according to the real-time operation data, executing a main node election operation on each candidate control cabinet, and determining a control right priority of each candidate control cabinet according to a sequence that each candidate control cabinet is elected to be a main node by the main node election operation; determining a target control cabinet from each candidate control cabinet in the intelligent excitation system according to the control right priority under the condition that an excitation regulation cabinet in the intelligent excitation system breaks down; and transferring a main control node of the intelligent excitation system from the excitation adjusting cabinet to the target control cabinet so as to control the operation of the intelligent excitation system through the target control cabinet. By adopting the method, the operation reliability of the intelligent excitation system can be improved when the system breaks down.

The invention discloses an active control method and system for suppressing torsional vibration of a permanent magnet synchronous wind driven generator, and the method comprises the steps: building a dual mass-rigidity-damping model through a lumped mass method based on transmission chain parameters and pneumatic torque, and obtaining a transmission chain dynamic equation; performing torsional vibration characteristic analysis on the natural wind speed, the pneumatic torque and the transmission chain dynamic equation to obtain a torsion angle, an eigenfrequency, a damping ratio equation and electromagnetic torque influence evaluation; and controller design is carried out on the torsional vibration mathematical model and the active disturbance rejection controller parameters to obtain an electromagnetic torque compensation amount, and active suppression of torsional vibration is realized. According to the invention, through cooperation of a physical model and intelligent control, a sensing-analysis-compensation closed loop is formed; a high-precision mathematical model is constructed, and a wind-machine-electricity coupling effect is captured; the ADRC regards unknown parameters and external disturbance as total disturbance, real-time estimation and compensation are carried out through a tracking differentiator, and an accurate system model is not needed; torsional vibration is restrained, and adaptability is enhanced.

The invention relates to an optimal proportioning method for a grid-constructing type wind turbine generator and a grid-following type wind turbine generator in a wind power plant, solves the problem of subsynchronous oscillation of the grid-following type wind turbine generator in the wind power plant under a weak power grid, and belongs to the technical field of electrical equipment. The method comprises the following steps: respectively establishing state space models of single machines and power grid lines of a network-constructing type wind turbine generator and a network-following type wind turbine generator; according to the established state space model, single-machine port frequency domain impedance in the grid-forming type wind turbine generator set and the grid-following type wind turbine generator set is obtained, black box processing is conducted on all the generator sets, and the equivalent impedance of a whole grid-connected port of the wind power plant is calculated in combination with the connection mode between the wind turbine generator sets and the connection mode between the wind turbine generator sets and a power grid line; positive and negative resistance and capacitive-inductive reactance characteristics of the subsynchronous frequency band are obtained according to the equivalent impedance, the overall interference stability of the wind power plant is judged according to the characteristics, if the stability is not stable, the proportion of the net-forming type wind turbine generator is increased, the equivalent impedance is calculated again till the stability is achieved, and the proportion is output.

The invention discloses a current compensation type three-vector model prediction control method for an off-grid doubly-fed wind turbine generator, belongs to the technical field of doubly-fed wind turbine generator control, and aims to solve the problems of voltage sag and high total harmonic distortion rate of a micro-grid system caused by sudden load change during off-grid operation of the doubly-fed wind turbine generator. The control method comprises the steps that on the basis of virtual synchronous networking control, an off-grid doubly-fed wind turbine generator rotor current prediction model is established, load current, stator side converter current and stator voltage are introduced into three-vector model prediction control, and the voltage coupling effect and current change caused by load abrupt change are compensated in real time, so that the rotor current of the off-grid doubly-fed wind turbine generator is predicted. Obtaining a compensated rotor current reference; a cost function is designed by taking the minimum prediction error of the rotor current as a target, so that accurate prediction of the rotor current during sudden load change is realized, a voltage sag phenomenon caused by sudden load change is effectively inhibited, the harmonic content of output voltage is reduced, and meanwhile, quick response to system frequency and load power is realized.

The invention relates to an inertia synchronization PMSG self-adaptive control method based on online impedance estimation, and belongs to the field of new energy grid connection. The method comprises the following steps: S1, constructing an RLS-GA hybrid strategy algorithm to quickly and accurately identify power grid impedance, and determining the strength type of a power grid; s2, establishing a direct-drive fan grid-connected system control strategy, and adopting a power control ring, a current control ring and an inertia transmission control ring at a machine side; the grid side adopts a direct-current voltage synchronous loop, a reactive voltage control loop and a stabilization control loop; s3, linearizing the control equation, and based on a linearized small signal equation, obtaining a state variable of the direct-current voltage synchronous control grid-connected system of the grid-forming type direct-driven wind turbine generator; s4, calculating control parameters of a reactive voltage control loop and a direct-current voltage synchronous loop; and S5, carrying out adaptive parameter setting on an existing permanent magnet fan inertia synchronization strategy so as to adapt to the change of strong and weak power grids and improve the stability performance of the PMSG under different power grid short circuit ratios.

The invention discloses a wind turbine generator inertia process load optimization control method based on a wind speed estimator, and the method comprises the steps: employing the wind speed estimator and a feedforward controller to calculate the feedforward pitch angle of a wind turbine generator according to the current wind speed, and the wind speed estimator is generated through training of a width learning algorithm; adopting a feedback controller to calculate a feedback pitch angle of the wind turbine generator according to the generator rotating speed of the wind turbine generator and the current wind speed; calculating the pitch angle deviation of the wind turbine generator according to the frequency monitoring value of the wind turbine generator; according to the feed-forward pitch angle, the feedback pitch angle and the pitch angle deviation, the active power of the wind turbine generator is calculated; and performing active power control on the wind turbine generator according to the active power.

The invention discloses a rotor position estimation method under initial turn-to-turn short circuit of an aviation permanent magnet starter generator, and the method specifically comprises the steps: obtaining a correlation formula when a permanent magnet synchronous motor is in a healthy state and a turn-to-turn short circuit fault occurs; on the basis of the turn-to-turn short circuit fault, voltage and current are obtained; inputting the three-phase current and voltage into a sliding-mode observer after the three-phase current and voltage are subjected to Click conversion to obtain back electromotive force; the back electromotive force is filtered, the positive sequence component is extracted, the fundamental wave back electromotive force is obtained, and accurate rotor position information can be estimated through a phase-locked loop. According to the method, when the aviation permanent magnet starter generator is operated in a power generation state without a position sensor, harmonic interference generated by a motor turn-to-turn short circuit fault is separated by designing a high-order generalized integrator, so that a positive sequence component in a fundamental wave back electromotive force estimated value is accurately obtained and is used for rotor position estimation after the turn short circuit fault occurs; the magnetic field orientation deviation caused by the turn short fault is eliminated, and the optimal fault feature extraction environment is ensured.

The disclosure relates to a four-phase motor and generator device with increased efficiency for generating electrical energy. The device features a stator wall with eight stator slots and four pole groups, and an armature rotatable within the stator wall. The eight stator slots are divided into four pole groups of opposing stator slots; the two opposing stator slots include an N (North) stator slot and an S (South) stator slot. N and S stator slots are alternatively activated in response to the rotation of the armature. The activation of the armature pole groups results in armatures rotating the magnetic field within the stator wall, and only four of the eight poles are actively coupled in any given configuration. The disclosure also includes a method of operating the motor for generating electrical energy with increased efficiency and in an environmentally friendly manner compared to conventional motors.

An electric drive unit (1A, 1B) for an aircraft (2) comprises an electric machine (10A, 10B) with at least one stator (100A, 100B) and at least one rotor (101A, 101B) rotatable relative to it about an axis of rotation (D), wherein the electric machine (10A, 10B) has several sub-machines (M1-M4) each with an electrical winding system (W1-W4), wherein the winding systems (W1-W4) can be energized independently of each other to set the at least one rotor (101A, 101B) into rotation about the axis of rotation (D), wherein the power of an energization of the winding systems (W1-W4) can be adjusted differently from each other.

The present invention provides a method for estimating the subtransient reactance of a surface-mounted permanent magnet motor based on the finite element method, which relates to the technical field of motors. The method includes constructing a finite element model, setting the rotor angular frequency, and calculating the back electromotive force amplitude and synchronous reactance under specific working conditions; performing at least two groups of parameter settings on the model, short-circuiting the three-phase winding circuit, and calculating the three-phase short-circuit current waveform; for the three-phase short-circuit current waveforms under different groups of parameters, selecting a specific phase to calculate the waveform difference; performing a spectral analysis on the waveform difference, and calculating the subtransient reactance parameter under the initial rotor position condition according to the relevant parameters of specific spectral components, the back electromotive force amplitude, and the synchronous reactance; changing the initial rotor position, and taking the average value of the subtransient reactance parameters at multiple positions as the final result. The present invention considers the influence of rotor eddy currents, and based on the finite element method, accurately and efficiently estimates the subtransient reactance through multi-step calculations and parameter adjustments, helping to optimize the power system.

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 relates to a voltage limiting control method for a series-type offshore wind power DC collector system, comprising: superimposing a low-voltage DC link voltage control loop on the power control loop of the wind turbine generator-side converter, and obtaining a reference value for the d-axis component of the generator-side converter voltage. umsd_ref and q-axis component reference value umsq_ref The control signal for the generator-side converter is generated through sinusoidal pulse width modulation to maintain stable low-voltage DC link voltage while ensuring stable power output. The grid-side converter of the wind turbine adopts voltage / frequency control to obtain the d-axis reference value of the grid-side converter output voltage. uod _ ref and q-axis reference value uoq _ ref The grid-side converter control signal is generated by sinusoidal pulse width modulation. By setting the d-axis setpoint of the grid-side converter output voltage, the AC output voltage of the grid-side converter is limited, thereby controlling the DC output voltage of the wind turbine generator within the limit value.

A gas turbine engine having a first pressure spool and a second pressure spool includes a power transfer system to transfer mechanical power between the first pressure spool and the second pressure spool. The first pressure spool can include a first electric machine to convert mechanical power from the first pressure spool to a first electric power. A coupled electric machine having a first coupled rotor and a second coupled rotor can be rotatingly coupled to the first pressure spool and the second pressure spool, respectively. The coupled electric machine is configured to receive an output power (e.g., an output power from an AC / AC converter) to drive a winding of the coupled electric machine to enable power transfer between the first pressure spool and the second pressure spool. An AC / AC converter can be electrically disposed between the first pressure spool and the second pressure spool.

To operate a turbine type flow volume control device in a stable manner at an early stage even when a state in which a flow volume of a fluid is low occurs.SOLUTION: A main circuit 91 of a turbine type flow volume control device 10 recovers a regenerative electric power generated by a rotation of a turbine 31 of a generator 30, and controls a rotation of the turbine 31 by inputting an electric power to the generator 30. The main circuit 91 includes a DC link capacitor 91A and outputs the regenerative power according to a DC link voltage Vm. Circuits 92A to 92E control the operation of the main circuit 91 and operate by the regenerative power output from the main circuit 91. When the DC link voltage Vm is lower than Vm2, a first power supply part 95C supplies a power stored in a first power storage unit 95B to the main circuit 91 to charge the DC link capacitor 91A. A second power supply part 96D operates the circuits 92A to 92E by supplying the power stored in a second power storage part 96B to the circuits 92A to 92E when the DC link voltage Vm is lower than Vm2.SELECTED DRAWING: Figure 2

The invention discloses a wind power generation and energy storage integrated system based on an open winding motor and a control method of the wind power generation and energy storage integrated system. The system comprises an open winding permanent magnet synchronous wind driven generator, a controller, an energy storage device, a machine side converter, a network side converter, a three-phase diode rectifier bridge, a capacitor, a three-phase power grid and a filter. Compared with a traditional direct-drive type permanent magnet synchronous wind power generation system, the wind power generation system has the advantages that the structural characteristic of double-end feed of the open winding motor is utilized, the capacity of the system for absorbing wind energy can be brought into full play, and the problem of low electric energy quality caused by intermittent wind power generation and generated power fluctuation is solved. The invention can effectively reduce the cost of the open winding permanent magnet synchronous wind power generation system, improve the energy utilization rate, reduce the system control complexity and improve the power quality of the power grid.

The invention discloses a compressed air power generation control system based on mechanical virtual inertia and a power generation method, and belongs to the technical field of distributed power generation microgrids. Comprising a mechanical control system and a virtual inertial system. The mechanical control system comprises an air storage tank, an air compressor, a switch valve, a pressure sensor, a temperature sensor, a hydraulic motor, a magnetic gearbox, a power generation system and a power grid load. The air storage tank, the air compressor, the switch valve, the hydraulic motor, the magnetic gear box, the power generation system and the power grid load are connected in sequence; and the pressure sensor and the temperature sensor are respectively connected with the air compressor. The power generation stability is controlled through the mechanical virtual inertia method, the efficiency of the compressed air power generation system is improved, and stable operation of the compressed air power generation system under different working conditions is guaranteed.

The invention provides a voltage amplitude feedback system based on direct-axis current fuzzy control output amplitude limiting. The system is provided with fuzzy logic controller optimization design, field weakening control strategy optimization selection and a dynamic amplitude limiting strategy. According to the fuzzy logic controller optimization design, a fuzzy rule system based on prime mover input rotating speed and output direct-axis current expected value mapping is constructed, a membership function and a fuzzy rule are optimized through open-loop experimental data, and a complex dynamic relation is accurately reflected; a field weakening control strategy based on voltage amplitude feedback is adopted in field weakening control strategy optimization selection, direct-axis current output is guaranteed preferentially, and output overvoltage is prevented from damaging follow-up components such as loads; according to the implementation of the dynamic amplitude limiting strategy, the amplitude limiting bandwidth is accurately set, it is ensured that the direct-axis current output based on voltage amplitude feedback has enough fluctuation bandwidth when the input rotating speed is gently input, and a system is built to verify the feasibility of the strategy.

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 present invention relates to a method for improving the stability of a voltage regulator of a synchronous generator with a small duty cycle and a voltage regulator circuit. In the case of a small duty cycle, a method for connecting a stabilizing resistor in series in the voltage regulator is used. Through speed judgment and control, a stabilizing resistor is inserted when the variable frequency AC generator is at a high speed. The magnitude of the excitation current is limited by voltage division, and the superposition of the resistor voltage division part and the excitation machine winding voltage division part is equivalent to amplifying the small duty cycle, thereby improving the stability of the system loop. Through verification by an existing variable frequency motor, the system excitation current can maintain the continuity of the current compared to when no current is taken, and the unloading fluctuation rate is significantly reduced.