788 results about "Voltage compensation" patented technology

The invention relates to the technical field of charging piles, and provides a DC charging pile voltage stability optimization method and device and a storage medium, and the method comprises the steps: obtaining voltage sequence data of a DC output end of a charging pile, carrying out the segmentation statistics of the voltage sequence data, and obtaining an optimization adjustment matrix and a voltage compensation factor matrix; and performing dynamic adjustment on a preset direct current output control strategy of the charging pile based on the optimization adjustment matrix to obtain an adjusted control strategy parameter, performing compensation calculation on the adjusted control strategy parameter by using the voltage compensation factor matrix to obtain an optimization control instruction, and generating a dynamic voltage stabilization control signal according to the optimization control instruction. An output control strategy is dynamically adjusted by optimizing an adjustment matrix and a voltage compensation factor matrix, an efficient dynamic voltage stabilization control signal is generated, and the problems of response lag and insufficient prediction precision existing in the prior art when a complex voltage fluctuation mode is processed and a future voltage change trend is predicted are solved.

The invention relates to the technical field of resonance suppression, and discloses an active damping control LC resonance suppression method and device. The method comprises the following steps: performing parameter identification processing based on bus voltage to obtain an inductance value, a capacitance value and a resonance frequency of an LC circuit; extracting a resonant current component of the current signal based on the resonant frequency; calculating damping power according to the resonance current component, and converting the damping power into a voltage compensation instruction under an alpha-beta coordinate system; generating a PWM control signal according to the voltage compensation instruction and a voltage reference instruction; and performing on-off control on the inverter based on the PWM control signal, and injecting power opposite to the resonant current component into the LC circuit to generate a virtual damping effect. Virtual impedance characteristics are seamlessly integrated into inverter control, rapid response of the whole process from resonance detection to power injection is ensured, the resonance peak value is effectively suppressed, and the current quality is improved.

The invention relates to the technical field of display screen driving, in particular to a low-power-consumption display screen driving method and system based on the OLED technology, and the method comprises the steps: S1, carrying out the image feature detection, collecting the inter-frame brightness change rate, the sub-pixel gray level distribution and the regional temperature gradient, and generating a dynamic driving signal parameter; s2, voltage compensation adjustment: dividing a power consumption area according to a brightness change rate, calculating a brightness compensation coefficient and correcting the voltage by combining gray level distribution and a temperature gradient, and realizing sub-pixel voltage dynamic adjustment; and S3, refresh frequency control: adjusting a local refresh rate according to the compensation coefficient and the correction voltage, executing a frequency reduction strategy on a high-power-consumption area, triggering ghosting suppression on a low-power-consumption area, and applying a temperature threshold to constrain a refresh upper limit. According to the invention, energy-saving driving, ghost suppression and brightness balance of the OLED display screen are realized, and the display performance and the system intelligence are effectively improved.

The invention provides a wide-voltage self-adaptive closed-loop vector swimming pool pump anti-interference method, and relates to the technical field of motor control and power electronics, and the method comprises the steps: collecting three-phase power supply voltage fluctuation characteristic parameters and motor operation state parameters in real time; performing amplitude compensation and phase synchronization correction on the voltage parameter based on the dynamic voltage compensation factor; a closed-loop vector anti-interference control model is constructed, and model parameters are adjusted in real time through a vector immunity coefficient; dynamically correcting control output by adopting a multivariable feedback regulation mechanism; executing an anti-interference instruction and synchronously updating PWM modulation parameters, and verifying a control effect in combination with hardware-in-the-loop simulation; and parameter self-learning optimization is realized through a genetic algorithm. The dynamic anti-interference capability under power grid voltage fluctuation and harmonic interference is improved, intelligent thermal management is realized through a temperature-voltage-current multi-dimensional coupling model, full-life-cycle self-adaptive optimization of the system is guaranteed, and the problems of compensation lag, insufficient harmonic suppression and poor long-term stability are effectively solved.

The invention relates to the technical field of variable frequency speed regulation, in particular to an automatic water pump control strategy and energy efficiency optimization method and system.The method comprises the following steps of obtaining water pump outlet flow data, calculating flow acceleration, determining the pressure gradient direction, matching the hydraulic power trend, calculating frequency instruction deviation and setting the adjustable range; lagging and current rising mark inertia disturbance, power frequency limitation is set, a compensation value is generated, the frequency rate is dynamically adjusted in combination with all factors, and the frequency conversion adjusting priority is generated. According to the method, through matching of the flow acceleration and the pressure gradient, the sensing capacity for dynamic changes of fluid is improved, frequency adjustment of a frequency converter is optimized in combination with frequency deviation calculation, energy consumption increase caused by lag is reduced, and based on correlation analysis of the motor rotating speed change rate and current fluctuation, inertia disturbance accurate recognition is achieved; the voltage compensation timeliness is improved by combining bus voltage dynamic monitoring and a reverse compression strategy, the frequency of the frequency converter is dynamically adjusted by combining multiple parameters, and the response speed and the energy efficiency are improved.

The invention provides an off-grid multi-machine parallel control method for an energy storage converter, and the method comprises the following steps: a host obtains a given voltage, and transmits the given voltage to each slave; the host acquires power feedback of each slave, calculates average power based on the power feedback of all the slaves, and sends the average power to each slave; the slave obtains slave first voltage compensation based on the average power and the power feedback; and the slave performs voltage loop control and current loop feed-forward calculation at least based on the given voltage and the slave first voltage compensation. According to the energy storage converter off-grid multi-machine parallel control method provided by the invention, the host issues the average power to each slave to realize power equalization, and the voltage compensation is calculated according to the difference between the average power and the power feedback to compensate to the given voltage; the dynamic responsiveness of the dynamic voltage is improved, meanwhile, the power and current balance of each energy storage converter in parallel operation is guaranteed, and dynamic and steady-state operation of multiple energy storage converters in parallel operation is achieved.

The invention relates to the technical field of converter power averaging and circulating current suppression, in particular to a power averaging and circulating current suppression method for parallel operation of a plurality of grid-forming type energy storage converters, which averages power through communication interaction and generates frequency and voltage compensation quantity by adopting a first regulator and a second regulator to realize accurate power averaging; meanwhile, the total current is measured locally, and virtual impedance feedforward control is adopted, so that rapid suppression of the high-frequency circulating current is realized. According to the invention, high-precision active power and reactive power equalization is realized, the capacity utilization rate is improved, high-frequency circulating current is effectively suppressed, loss and thermal stress are reduced, dynamic performance and system reliability are considered, a cooperative control architecture with complementary advantages is formed, adaptability to complex working conditions and system stability are enhanced, and engineering applicability is improved.

The invention provides an impedance scanning device based on network side voltage dynamic compensation under a three-phase voltage imbalance working condition, and relates to the technical field of new energy station power electronic converter topology and control, the device comprises a three-phase rectifier, a direct current bus capacitor, an inverter, a voltage compensation device, a frequency sweeping device, a circuit breaker and a series transformer part, the three-phase rectifier is connected in series with inverters of the voltage compensation device and the frequency sweep device, a secondary side of a series transformer of the voltage compensation device is connected in series with a network side, a secondary side of a series transformer of the frequency sweep device is connected in series with a grid-connected point, and a primary side of the series transformer is connected to the inverters and is coupled to a secondary side of the series transformer; according to the device, the power grid side voltage is rectified through the voltage compensation unit and is compensated to the grid side after being subjected to single-stage inversion transformation, voltage compensation is achieved through the energy of a power grid when the voltage is unbalanced, and an external energy source or an interference source does not need to be introduced. After compensation, the accuracy of the frequency sweeping result is obviously improved.

The invention discloses a multi-converter cooperative network construction oscillation suppression method and device and a storage medium, and belongs to the field of converter network oscillation suppression, and the method comprises the steps: carrying out the calculation based on a power-frequency droop control strategy of active compensation to obtain an active power output value of a converter, so as to achieve the smooth adjustment of the active power of the converter; the mechanical inertia and the damping coefficient of the multi-converter cooperative network construction are calculated through an inertia-damping equation considering the dynamic influence, so that the dynamic adjustment of the mechanical inertia and the damping coefficient is realized; and a reactive power output value of the converter is calculated based on the voltage-reactive droop control strategy of voltage compensation, so that reactive power compensation adjustment of the converter is realized. Through active compensation and consideration of dynamic influence and voltage compensation, multi-converter collaborative networking can quickly respond and keep the stability of a power grid under the conditions of frequency fluctuation, voltage imbalance and load disturbance, and power fluctuation and oscillation are reduced.

The invention discloses a flexible control method and system for a bidirectional charging pile, and the method comprises the steps: collecting a physical port voltage and a loop current, calculating a voltage compensation amount through combining with an impedance compensation parameter, and generating a virtual feedback voltage for a voltage control loop; according to the working mode (charging / discharging) of the charging pile and the comparison result of the physical port voltage and the corresponding cut-off voltage threshold value, whether the system is in a safe area or a touch boundary is judged. In the safe area, the first type of correction is adopted to maintain the positive response characteristic; and when the boundary is touched, the second type of correction is adopted to limit the output and ensure that the port voltage does not exceed the preset threshold range. The method is used for improving the stability of the effective response duration and the adjustment precision when the bidirectional charging pile participates in the high-frequency power grid auxiliary service.

The invention discloses an open-phase self-fault-tolerant control method for a phase-shift-free dual three-phase permanent magnet synchronous motor. The method can automatically adjust a current distribution relation in the case of an open-phase fault and suppress torque pulsation in combination with neutral point voltage compensation. Comprising the following steps: driving two pairs of three-phase winding modules of the phase-shift-free DTP-PMSM in parallel by adopting two two-level three-phase voltage source inverters, and providing a mathematical model of the motor; current distribution is automatically adjusted; compensating the voltage of the neutral point, and calculating the offset of the fault module; the current is redistributed to suppress the torque ripple after the fault, and the secondary oblique wave component generated by the phase failure fault is eliminated; a current loop controller is improved through dead-beat predictive control; the speed ring controller is optimally designed into an improved sliding mode controller; an improved double-loop controller system is formed by combining improved sliding mode control and dead-beat prediction control, high-gain parameters are set to improve the dynamic response performance of the system, and a new self-fault-tolerant control system is formed.

The invention relates to the field of power grid simulation, and particularly discloses a control method of an alternating-current power grid broadband oscillation simulation device based on a component physical model, which realizes broadband domain oscillation simulation of an alternating-current power grid based on the component physical model and a notch filter. Specifically, according to the control method of the alternating-current power grid broadband oscillation simulation device based on the element physical model, an adjustable element physical model type and a corresponding impedance parameter serve as input conditions, and a dynamic voltage compensation component excited by power grid impedance is calculated in combination with an adjustable notch filter; and a power grid simulation reference signal is constructed in real time through superposition of an original input reference voltage value and a dynamic voltage compensation component excited by power grid impedance, so that oscillation simulation in a wide frequency domain of the alternating-current power grid is realized.

The invention provides a lithium-sulfur battery abnormal heating diagnosis method and system based on deep learning, and belongs to the technical field of lithium-sulfur battery safety monitoring. According to the method, an enhanced temperature difference sequence is constructed based on temperature and voltage detection data, a temperature state sequence is modeled, and continuous dynamic representation of thermal behaviors is realized; a double-path gating mechanism is designed, a global temperature rise suppression gate is utilized to capture the overall temperature rise trend, and an abnormal temperature rise sensitive gate is combined to focus local violent fluctuation, so that normal charging and discharging temperature rise interference is effectively suppressed, and temperature abnormal probability distribution is output; meanwhile, according to the interval where the current SOC is located, a corresponding voltage compensation function is selected, original voltage data are corrected point by point, a double-group long and short time memory network is designed to extract voltage platform drift characteristics, the perception capability of abnormal drift caused by the polysulfide effect is enhanced, and finally a comprehensive risk index is generated. And when the lithium-sulfur battery is under the polysulfide shuttle effect, the battery heating abnormity identification accuracy and robustness are obviously improved.

The invention discloses a bus fault analysis method and system for voltage sag, and relates to the technical field of bus fault analysis. The method comprises the following steps: synchronously acquiring three-phase voltage waveform data of a bus through a multi-source sensor, and obtaining a voltage sag event data set; performing sag feature extraction on the voltage sag event data set to generate a feature vector group; performing fault type identification according to the feature vector group in combination with a bus topological structure, and determining a fault judgment result; generating a dynamic reactive power compensation instruction based on the fault judgment result, performing adjustment through the dynamic reactive power compensation instruction to perform sag compensation on the bus voltage, and generating voltage compensation waveform data; and performing bus fault analysis according to the voltage compensation waveform data to generate a bus fault report. The technical problem that the bus fault analysis is not accurate enough in the prior art is solved, and the technical effect of improving the bus fault analysis accuracy is achieved.

The invention relates to the technical field of power electronics, in particular to a direct-current charging pile insulation monitoring method and system, and the method comprises the following steps: monitoring the voltage deviation between a branch and a bus in real time, adjusting a measurement compensation parameter, correcting a branch insulation resistance measurement value, recognizing leakage current drift, positioning a leakage branch, triggering relay control, and sending alarm information. And generating a charging pile monitoring record. According to the method, the branch voltage deviation trend and the voltage compensation parameters are combined, the branch voltage measurement consistency is improved, the insulation resistance fluctuation is utilized to compare and correct the observation error, the measurement precision is optimized, the current deviation compensation in the no-load state is adopted to eliminate the zero drift interference of the sensor, and the measurement accuracy is improved. A current jump amplitude and a voltage direction are combined to identify an electric leakage branch, positioning accuracy is enhanced, a relay control and event information linkage mode is used, alarm response and equipment state records form a closed loop, and real-time performance and integrity of system monitoring are improved.

The invention relates to the technical field of motor control, and discloses a voltage compensation stable management system for a vortex oscillator motor, and the system comprises a detection unit which is used for collecting a bus current signal; the processing unit is used for performing differential operation on the bus current signal to determine a current change rate, judging that a load sudden change working condition is entered when the current change rate exceeds a preset threshold value, and further querying a load response coefficient according to a preset feature table and calculating a voltage compensation increment; and the driving unit is used for adjusting the phase shift angle of the excitation voltage according to the voltage compensation increment. According to the invention, by identifying the load working condition in real time and executing feedforward compensation, the instantaneous voltage drop caused by load switching is eliminated, the voltage steady-state characteristic of a motor driving link is maintained, the rotation speed fluctuation is effectively inhibited, and the dynamic response capability of the system under the variable load working condition is enhanced.

The invention relates to the technical field of micro-grid control, and provides an island micro-grid distributed control method, system and device and a storage medium. Comprising the following steps: performing voltage compensation gain and frequency compensation gain calculation based on droop control output of each distributed power generation unit, droop control output of all neighbor distributed power generation units, and a voltage dynamic tracking error and a frequency dynamic tracking error which are obtained by calculating a microgrid global recovery target to obtain secondary adjustment output; and after corresponding items in the droop control output and the secondary regulation output are summed to generate comprehensive reference output, voltage synthesis is carried out according to the comprehensive reference output to obtain voltage regulation output for output control of a corresponding inverter. Based on a distributed regulation and control mechanism for cooperatively calculating the compensation amount of each power generation unit by using neighbor information and a global recovery target, the dynamic response speed and the power distribution precision can be improved, voltage drop and frequency deviation caused by load disturbance are effectively eliminated, and rapid recovery is realized.

The invention relates to the technical field of reactive power compensation of a power system, in particular to a stable voltage compensation control method applied to a micro-grid cluster, which specifically comprises the following steps of: analyzing principal components of all items of grid data of each node through a principal component analysis algorithm, extracting the first three principal components, and performing data weight distribution through an entropy weight method to obtain a data weight distribution result; constructing reactive compensation priorities of the nodes; the future reactive compensation priority of the node is predicted through the historical reactive compensation priority of the node, the fluctuation rate of prediction data is analyzed, and the dynamic compensation urgency of the node is constructed in combination with the clustering condition of the node at the current moment; a hierarchical resource allocation strategy is implemented according to the dynamic compensation urgency degree, the calculation process is updated in real time according to the reactive compensation feedback result, a self-optimization closed loop is formed, the problems that a traditional method is insufficient in quantization precision and poor in real-time performance are solved, the reactive demand matching precision and the voltage maintaining stable effect are improved, and the method is suitable for large-scale popularization and application. And the communication load and the calculation complexity are obviously reduced.

The invention discloses a frequency voltage decoupling control method and a frequency voltage decoupling control system under a fault of a hybrid wind power plant, and belongs to the technical field of wind power generation. First voltage compensation is added to the following net type draught fan and the net constructing type draught fan through the frequency adjusting parameters and the current active power variable quantity; when only the active voltage support is started, first frequency compensation is added to the following net type draught fan and the construction net type draught fan through the voltage adjusting parameters and the current reactive power variable quantity; and when the active frequency support and the active voltage support are started at the same time, adding second voltage compensation and second frequency compensation to the following grid type fan and the constructing grid type fan by using the frequency adjustment parameter, the voltage adjustment parameter, the current active power variable quantity and the current reactive power variable quantity. According to the scheme, active and reactive feed-forward decoupling is carried out on the following / constructing network type fan through decoupling compensation control, and the interaction influence in the frequency voltage supporting process is restrained.

A control system for a direct current (DC) microgrid is described. The control system includes a DC bus with a positive bus line and a negative bus line, DC battery circuits with a positive coupler connected to the positive bus line and a negative coupler connected to the negative bus line, switches including a control input terminal located in each DC battery circuit, a distributed generator circuit connected to the DC bus, a constant load power circuit connected to the DC bus, a computing device connected to each control input terminal, the DC bus, the distributed generator circuit and the constant load power circuit. The computing device includes an electric circuitry, a memory, and at least one processor to determine a DC bus voltage, determine the SoC of the DC battery circuits, generate PWM signals that control the DC bus voltage, and balance the SoC of the DC battery circuits.

The invention belongs to the technical field of battery state detection, and discloses a lead-acid battery health assessment method and system based on simulated working conditions. Comprising the steps of collecting lead-acid battery simulation operation data and performing data cleaning to obtain high-quality battery data; screening recovery effect data and removing the recovery effect data from the high-quality battery data to obtain disturbance-removed battery data; performing polarization voltage compensation to generate voltage compensation battery data; abnormal impact identification is executed, abnormal data filtering is carried out on the voltage compensation battery data based on an identification result, and reasonable battery data is output; identifying long-period data and performing risk judgment to obtain corrected battery data and cover corresponding data in the reasonable battery data to obtain differentiated battery data; performing health state evaluation on the differentiated battery data, and outputting health indexes of the lead-acid battery; and the evaluation accuracy of the real health level of the battery under the simulated working condition is remarkably improved.

The invention discloses a battery charging and discharging power self-regulation control circuit, which relates to the technical field of battery control, and comprises a power supply module, a micro-control module, a voltage sampling and comparison module, a battery charging and discharging power self-regulation control module, a battery charging and discharging power self-regulation control module, a battery charging and discharging power self-regulation control module and a battery charging and discharging power self-regulation control module, the power regulation module compensates the direct-current electric energy, the battery module stores energy, the power regulation module and the direct-current electric energy are superposed and supply power to the battery module, during the discharging period, according to the voltage comparison condition, the power regulation module carries out voltage compensation processing on the battery module, and the battery module directly supplies power to the discharging module; and the power regulation module performs voltage balance control on the battery module. The battery charging and discharging power self-adjusting control circuit can prolong the service life of the battery, improve the charging and discharging efficiency, reduce the electric energy loss of the power adjusting module, improve the energy utilization rate and provide higher charging voltage.

The invention relates to the technical field of wireless charging, in particular to a constant-current and constant-voltage wireless electric energy transmission method and a constant-current and constant-voltage wireless electric energy transmission system. Obtaining the charging current of the next iteration based on the battery end voltage of each iteration in the constant current charging state, the actual output power of the electric energy transmitting end of each iteration, the charging current of each iteration and the equivalent line resistance; when an iteration cut-off condition is satisfied, obtaining a target charging current in a constant current charging state; based on the target charging current, a preset standard current and the internal resistance of the battery, obtaining a voltage compensation amount caused by the change of the charging current; the target switching voltage is obtained according to the voltage compensation amount and the preset standard switching voltage, the constant current charging state can be switched to the next charging state according to the target switching voltage, effective, timely and reliable switching of the constant current is ensured, and then the wireless charging efficiency and safety are ensured.

The invention discloses a distributed new energy active power regulation and control method, device and equipment and a storage medium, and is used for solving the technical problems that an existing distributed new energy regulation and control mode is low in accuracy and poor in self-adaptability and real-time performance. Comprising the following steps: calculating a distribution network voltage compensation vector by adopting voltage deviation values of all distribution network nodes and an inverse matrix of a voltage sensitivity matrix; equally dividing the whole network power regulation quantity according to the number of the distributed energy equipment accessed to the distribution network node to generate a main network demand regulation vector; performing weighted fusion on the main network demand adjustment vector and the distribution network voltage compensation vector to obtain a global active adjustment target vector; calculating an equipment adaptation index of the distributed energy equipment by adopting an equipment adjustment capability parameter of the distributed energy equipment, a dominant frequency component in a global active adjustment target vector, a main network real-time power margin and a voltage deviation value; and allocating the adjustment task in the global active adjustment target vector to the distributed energy equipment for execution by adopting the dominant frequency component and the equipment adaptation index.

The invention relates to the technical field of flexible power transmission of a power system, in particular to a coordinated optimization method and system of a distributed power flow controller and a medium, and the method comprises the steps: building a layered equivalent coupling model of the distributed power flow controller; taking minimization of the total loss of the flexible power transmission system as an optimization target, and performing global optimization on a parallel side output voltage vector and a series side injection voltage vector of the distributed power flow controller by using a layered equivalent coupling model to obtain an optimal coordinated optimization control strategy; obtaining a target control parameter in a target control mode according to the optimal coordination optimization control strategy; and according to the target control parameter and the real-time voltage and current data of the power transmission line, calculating a voltage compensation amount needing to be injected into the flexible power transmission system, and according to the voltage compensation amount, carrying out coordinated optimization control on the power flow of the power transmission line. According to the method, the parallel side and the series side of the distributed power flow controller are coordinated and optimized by establishing the layered equivalent coupling model, so that the voltage stability and power flow equilibrium distribution of the flexible power transmission system are effectively improved.

The invention relates to the technical field of transformer control, and particularly discloses a transformer voltage regulation cooperative control method and system, and the method comprises the steps: continuously obtaining the voltage data of a key node of a power grid, and extracting the corresponding event feature information; obtaining health state information of each transformer, and determining a response priority and a voltage regulation limit parameter of each transformer; calculating a voltage compensation demand according to the event feature information; determining a transformer set participating in voltage regulation and corresponding regulation parameters; generating a voltage regulation instruction according to the transformer set participating in voltage regulation and the corresponding regulation parameter, and distributing the voltage regulation instruction to the corresponding transformer for voltage regulation control; according to the method, the transformer set participating in voltage regulation and the corresponding regulation parameters are dynamically determined according to the actual demand of the power grid and the individual difference of the transformers, overuse of the transformers poor in health condition is avoided, and collaborative optimization of a voltage regulation target and an equipment health maintenance target is achieved.

The invention discloses a low-voltage line intelligent voltage regulation voltage stabilizer control system, and relates to the technical field of voltage stabilizer control, an intelligent control unit judges whether the current line voltage needs voltage regulation control based on a control algorithm, if yes, a corresponding voltage regulation control instruction is generated, a silicon controlled rectifier switching module executes non-contact on and off operation, and the voltage regulation control is completed. The voltage regulation compensation module is used for carrying out voltage compensation on the basis of the output of the voltage transformation module, so that the output voltage is controlled within a preset range, and when the power grid voltage is detected to be recovered and stable within a set time, and when the power grid voltage is detected to be abnormal, the voltage regulation compensation module is used for carrying out voltage compensation on the basis of the output of the voltage transformation module. And the intelligent control unit is automatically switched into a bypass for operation. According to the control system, a voltage stabilization control framework with high response speed, three-phase independent adjustment capability, an intelligent dormancy mechanism and a complete fault protection system is constructed, and the intelligent level and the operation performance of the low-voltage power distribution system are remarkably improved.

The invention discloses a motor adaptive harmonic suppression system and method fused with LSTM prediction, and belongs to the technical field of power electronic control. Comprising a harmonic feature extraction module, a trapezoidal angle prediction module, an integral adjustment module and a trapezoidal voltage compensation module. The harmonic feature extraction module converts the three-phase current into dq-axis current; the trapezoidal angle prediction module establishes a model for predicting an optimal initial trapezoidal angle based on a long short-term memory neural network according to the d-axis harmonic current, the motor rotating speed and the bus voltage; the integral adjusting module adjusts a trapezoidal angle on line by inputting a harmonic error; and the trapezoidal voltage compensation module is used for modulating trapezoidal compensation voltage and outputting compensation voltage required by an alpha axis and compensation voltage required by a beta axis. According to the invention, prediction of the long-short-term memory neural network and online adjustment of the trapezoidal angle and modulation of the trapezoidal compensation voltage of the integrator are fused, the harmonic current of the permanent synchronous motor control system can be effectively inhibited, the torque ripple of the motor is reduced, and the performance of the motor is improved.

Systems and methods are provided for a transportation vehicle. A system includes a power delivery component comprising a power delivery port and a power meter component to measure a power delivery component voltage received at the power delivery component via a cable, and a seat box connected to the power delivery component via the cable and configured to provide a supply voltage to the power delivery component via the cable. The seat box comprises a DC-to-DC converter to convert an initial DC voltage to a seat box DC voltage, a voltage compensation component to change the seat box DC voltage to the supply voltage, and a microcontroller configured to receive the power delivery component voltage from the power meter component, determine a voltage drop across the cable based on the power delivery component voltage, and control the voltage compensation component to adjust the supply voltage based on the voltage drop.

The invention relates to a terminal voltage flexible regulation and control method, and the method comprises the following steps: presetting target voltage parameters which comprise an amplitude value, a frequency and an initial phase angle; calculating a three-phase sinusoidal voltage reference signal based on a virtual synchronous machine algorithm according to the target voltage parameter; according to the three-phase sinusoidal voltage reference signal, generating a driving signal by using pulse width modulation, and controlling the on and off of an IGBT power switch device to generate a three-phase sinusoidal compensation voltage; injecting the three-phase sine compensation voltage into the tail end of a power grid; monitoring the voltage state of the power grid in real time, and calculating the deviation between the actual voltage of the tail end of the power grid and the target voltage parameter; and according to the deviation, adjusting a control parameter in the virtual synchronous machine algorithm, and updating the three-phase sine compensation voltage to compensate the voltage deviation at the tail end of the power distribution network. Voltage deviation can be compensated in time, and the problem of voltage change caused by large fluctuation of electrical load can be effectively solved.