36results about How to "Avoid overcompensation" patented technology

The invention relates to the technical field of photovoltaic power generation, and discloses a phase-locked loop-free photovoltaic power generation system multi-power quality cooperative improvement method and system, and the method comprises the steps: processing a collected current signal of a three-phase grid-connected point of a photovoltaic power generation system to obtain a current fundamental component and a current harmonic component of the grid-connected point, and determining a fundamental reactive power; determining the capacity required by harmonic suppression and the capacity required by reactive compensation according to the current harmonic component of the grid-connected point and the fundamental reactive power; obtaining the residual capacity of the photovoltaic power generation system, and carrying out an optimization algorithm to determine the optimal compensation coefficient of harmonic suppression and reactive compensation; and transmitting the optimal compensation coefficient of harmonic suppression and reactive compensation to a photovoltaic inverter control algorithm to complete multi-power quality collaborative improvement of the photovoltaic power generation system. The technical problems of large delay, slow control response speed, need of a phase-locked loop and poor power quality management target collaboration in the prior art are solved.

The invention relates to the technical field of numerical control machining and automatic control, in particular to a numerical control machining self-adaptive control system and method based on multi-source data, and the method comprises the steps that FPGA hardware synchronously collects main shaft current, servo current of each feed shaft, cutting vibration and grating ruler pulse, and time bases are aligned and packaged into a machining multi-dimensional state matrix; the multi-physical field error is decoupled through a three-layer cascade machine tool dynamics model, a tool nose contour deviation vector is solved, and servo lag and cutting force deformation factors are fused to construct a dynamic constraint boundary. When the deviation amplitude exceeds the limit, generating a speed feed-forward gain compensation instruction based on an inverse control model to perform instant suppression; when it is monitored that oscillation is eliminated and returns to a steady state, full-time-domain data stream interception logic is triggered, and a process optimization instruction is generated through backtracking. According to the method, the problems of nonlinear time-varying error decoupling and real-time compensation lag under multi-physics field coupling are solved, and the dynamic precision and process stability of numerical control machining under complex working conditions are remarkably improved.

The invention discloses an intelligent illumination control system for a rail transit LED, and relates to the technical field of rail transit illumination, and the system comprises a distribution module, an analysis module and a compensation module. And the distribution module is used for arranging a plurality of LED lamps through a multi-row linear arrangement method. According to the invention, the current, inductance and temperature data of each LED lamp are collected through the microcontroller, the light attenuation speed of each LED lamp is predicted based on the data, different measures are provided according to the predicted light attenuation speed of the LED lamp, when the light attenuation speed of the LED lamp is a primary level, the LED lamp is ignored, and when the light attenuation speed of the LED lamp is a middle level, the LED lamp enters the compensation module, and the LED lamp enters the compensation module. When the light decay speed of the LED lamp is high-grade, maintenance personnel are timely notified to carry out maintenance through telephones, short messages or mails, potential problems of the LED lamp are timely found and solved through grading processing of the light decay speed, and the stability of the whole lighting system can be improved.

The invention provides a dead zone compensation method, device and equipment of an energy storage converter, a medium and a product, and relates to the technical field of energy storage systems. According to the method, the interval of each phase of current is determined according to the three-phase output current acquired by the current sensor, and the basic dead zone compensation amount is dynamically calculated by combining the preset linear function, so that the problem of overcompensation or undercompensation caused by the fact that the existing fixed compensation amount method does not consider the compensation demand difference of different current magnitudes is avoided; the compensation direction is determined by obtaining the instantaneous value of each phase of modulation wave so as to obtain the target dead zone compensation amount, and accurate matching of the compensation direction and the expected output voltage direction is ensured; and the target dead-zone compensation amount and the original modulation wave are superposed to generate a corrected modulation wave, and then a pulse width modulation signal driven by a switching tube is generated, so that the pulse width modulation waveform difference caused by dead-zone time can be effectively counteracted, the output current harmonic wave of the energy storage converter is reduced, and the energy storage efficiency is improved. And stable and reliable operation of the energy storage converter and the whole energy storage system is ensured.

The application discloses a temperature compensation method based on thermal imaging of a machine tool ram, and relates to the technical field of machine tool thermal error compensation; the method comprises the following steps: installing a temperature measurement thermal imager and establishing a thermal distribution model, calculating thermal deformation amounts in three directions, obtaining a deformation correction error sequence, constructing a compensation error prediction model, determining an error compensation opportunity, and executing a progressive compensation strategy; two-dimensional temperature distribution data is obtained by the thermal imager, high-precision temperature distribution fields are generated by combining three-dimensional mapping technology, the theoretical deformation amounts in each direction are quantified based on an integral method, and dynamic analysis of multidimensional thermal deformation amounts is realized; meanwhile, an error correction amount is predicted in advance based on a time sequence prediction model of an LSTM network, combined with working condition parameters such as an environmental temperature and a spindle speed, active compensation is realized, a multi-condition triggering mechanism and a priority are set at the same time, and compensation at a suitable opportunity is ensured; a progressive compensation strategy avoids overcompensation or undercompensation, and a threshold alarm mechanism is combined to improve the robustness of the system.

The invention discloses a monthly power factor regulation and control method, a monthly power factor regulation and control device, monthly power factor regulation and control equipment and a medium, and belongs to the technical field of optical storage load micro-grids. The active power of an energy storage system in the optical storage load micro-grid is regulated and controlled according to the electricity price of the power grid in each time period and a preset gateway active maintenance threshold value; regulating and controlling the reactive power of an inverter system and the reactive power of an energy storage system in the optical storage load micro-grid according to the monthly power factor required value and a preset gateway reactive maintenance threshold value; the active power of the energy storage system, the reactive power of the inverter system and the reactive power of the energy storage system are regulated and controlled, so that the monthly power factor of the gateway in the optical storage load micro-grid meets the required value. Through the method, the monthly power factor of the gateway can meet the required value on the premise that the operation performance and the service life of the two-quadrant reactive compensation capacitor are not affected.

The invention discloses granary pressure control equipment and method, and the equipment comprises an evaporation cavity which is internally provided with an evaporator and an evaporation fan; the air supply pipe assembly and the air return pipe assembly are used for communicating the evaporation cavity with the granary; the air valves are arranged in the air supply pipe assembly and the air return pipe assembly respectively; the control center is electrically connected with the pressure sensor, the temperature sensor, the CO concentration sensor and the air valves; wherein the control center is used for judging the cause of unbalanced pressure in the granary according to the detection results of the pressure, the temperature and the COconcentration in the granary and correspondingly controlling the opening or closing state of each air valve so as to adjust the pressure in the granary. According to the invention, by carrying out structure transformation and control logic upgrading on the existing granary air conditioning equipment, the granary pressure regulation, the COconcentration regulation and the air conditioning refrigeration function are integrated in the same equipment, so that the cooperative control of the granary environment is realized.

The invention provides an Internet of Things wireless transmission method based on a dynamic arbitrary polarized antenna, which belongs to the technical field of wireless networks, and comprises the following steps: a master station finds a slave station to establish communication by adjusting the polarization direction of the antenna, and sends a handshake signal to establish communication; after communication is established, the master station periodically sends a judgment signal to the slave station, receives a feedback signal of the slave station, and judges whether the slave station needs to adjust the antenna polarization direction according to a polarization signal quality CQI result of the feedback signal; and the slave station performs switching when judging that the polarization direction of the antenna needs to be adjusted based on the judgment signal, calculates CQI data and feeds back the CQI data to the master station. According to the invention, the antenna with the adjustable polarization direction is matched with baseband processing and signaling protocols, so that the master station and the slave station can carry out adaptive polarization direction switching, and a reliable, stable and rapid communication state is ensured.

The invention discloses an automatic measurement and optimization method for impact prompt drop of a seamless steel tube hot continuous rolling mill, and the method comprises the steps: carrying out a plurality of rolling tests for a steel tube of one specification, reading the actual speed of a motor from a steel biting point to a set ending time point at a preset time interval during each rolling test, and calculating the actual speed of the motor; the minimum actual speed is selected; calculating a speed average value of the plurality of minimum actual speeds and a difference value between the speed average value and a given process speed of the motor; and taking the difference value as a speed drop compensation value corresponding to the steel pipe of the current specification. The optimization method comprises the steps of determining a speed drop compensation value corresponding to a steel pipe according to the specification of the steel pipe; before steel biting, the speed obtained after the given process speed is superposed with the speed drop compensation value serves as the motor running speed, and after steel biting, the given process speed serves as the motor running speed. Correlation between the steel pipe specification information and the prompt drop compensation value can be achieved, accurate compensation during rolling of steel pipes of different specifications is guaranteed, and the rolling quality is improved.

The invention relates to the technical field of asynchronous power generation, and discloses an asynchronous power generation system reactive compensation capacity determination method, which comprises the following steps: acquiring each asynchronous generator in an asynchronous power generation system and generator basic information and transformer substation basic information corresponding to a network access transformer substation corresponding to the asynchronous generator; reactive power compensation capacity required by each asynchronous generator and reactive power compensation capacity required by a network access substation are calculated; according to the distance between each asynchronous generator and the corresponding network access substation, determining a planning path corresponding to a power transmission line connecting the asynchronous generator and the network access substation, and according to the planning path corresponding to the power transmission line, calculating reactive compensation capacity required by the power transmission line; and calculating the reactive compensation total capacity corresponding to the asynchronous power generation system based on a preset compensation total capacity calculation formula.

The present application relates to the technical field of vehicle lamp control, and particularly relates to a vehicle lamp array light decay adaptive equalization method and system based on light type fingerprint inversion, which comprises the following steps: constructing a vehicle light type fingerprint library; driving the vehicle lamp based on the constructed self-check triggering condition and calibration current value, collecting the current light type brightness distribution map, vehicle body posture sensor data and lamp internal temperature sensor data; establishing a light decay inversion optimization model based on the current light type brightness distribution map, and calculating the light decay coefficient in combination with the light type fingerprint reference map; calculating the compensation PWM duty cycle vector based on the light decay coefficient, vehicle body posture sensor data and lamp internal temperature sensor data; checking the light type of the compensation PWM duty cycle vector, if the check is passed, the next step is entered, if the check is not passed, a degradation strategy is started, and an abnormal alarm is given; writing the compensation PWM duty cycle vector that passes the check into the multi-channel PWM register of the LED driving chip, and updating the state, so as to realize adaptive equalization of the vehicle lamp array light decay.

The application relates to the technical field of unmanned vehicle braking control, and discloses an unmanned trolley braking system and method based on self-diagnosis, which comprises a data acquisition unit, a control unit, a driving unit and a braking unit; the data acquisition unit acquires trolley operation data and transmits the data to the control unit; the control unit is internally provided with a self-diagnosis braking algorithm, real-time deceleration and theoretical braking distance are calculated through pre-braking test, the braking unit is controlled to perform basic braking, and the driving unit performs positive rotation or reverse rotation point compensation according to braking deviation; the method adopts a closed-loop process, that is, firstly, self-diagnosis test parameter calculation is performed, then, formal braking is performed, and finally, point compensation is implemented. The application dynamically adapts to complex working conditions. The application realizes real-time sensing and accurate compensation of braking capacity, greatly improves parking accuracy, reduces safety hazards, is suitable for high-precision braking scenes such as material handling in industrial and mining enterprises, and has remarkable practicability and popularization value.

A display device and a method for operating the display device are disclosed. The display device includes: a display panel including a plurality of pixels; a power manager that provides a first power supply voltage to the display panel through a first power supply line and a second power supply voltage to the display panel through a second power supply line, and measures a first current flowing through the first power supply line and a second current flowing through the second power supply line; and a panel driver that provides a panel driving voltage to the display panel and controls the panel driving voltage according to a current difference between the first current and the second current.

The invention provides a reactive compensation voltage regulation device and system for a small low-voltage power grid, and belongs to the technical field of reactive compensation of power systems. The device comprises a microprocessor, a voltage sampling module and a plurality of capacitor branches connected in parallel; one path of the fuse of each capacitor branch is connected to the live wire of the confluence busbar, the other path of the fuse is connected to the input end of the voltage sampling module, one path of the capacitor of each capacitor branch is connected to the zero wire of the confluence busbar, and the other path of the capacitor is connected to the input end of the voltage sampling module; the microprocessor determines a phase voltage and a load reactive power according to the obtained incoming current and compensation current of the reactive compensation voltage regulation device and the total afflux voltage of each capacitor branch; and controlling a relay of the capacitor branch to execute switching according to the phase voltage and the load reactive power. Based on the device, the invention also provides a reactive compensation voltage regulation system. According to the invention, the requirements of reactive compensation precision and response speed in a low-voltage small power grid environment are met.

The invention provides a display control method and device, a projection device and a computer readable storage medium, and belongs to the technical field of auxiliary driving, and the method comprises the steps: obtaining a target corresponding relation between a plurality of continuous target position points and a target height difference within a preset distance range in a vehicle driving direction; when the vehicle runs to each position point, the display height of the display image is controlled according to the target height difference corresponding to each target position point, so that the jitter displacement of the display image at each target position point is smaller than a displacement threshold value. When a vehicle passes through an uneven road surface, image dithering can be slowed down, and image trailing and blurring can be avoided at the same time.

The invention discloses a cold spraying additive forming method. The method relates to the technical field of additive manufacturing and comprises the following steps that S1, a model needing additive manufacturing is divided into a plurality of unit layers, and plane data of each additive unit layer is obtained; s2, the spraying scanning angle between a spraying gun and the base plate is adjusted, so that the current unit rail is in a deposition shape with one side perpendicular to the base plate; s3, performing scanning unit rail deposition along the edge contour line of the unit layer by using the unit rail, and constructing an outer contour line with a vertical side wall of the unit layer; s4, the spray gun is adjusted to be perpendicular, scanning filling of the inner area of the outline of the unit layer is carried out, and a defect-free unit layer is formed; s5, the process is repeated, and superposition deposition of different unit layers is completed until the model is formed; according to the method, after the edge of each unit layer is scanned in advance and the vertical contour edge is established, spraying and filling of the center part are conducted, control over the deposition morphology of the whole unit layer is better facilitated, the spraying method is more controllable, the spraying focus at the edge is easier to determine, and the forming precision is higher.

The application discloses a kind of virtual synchronous generator secondary frequency modulation adaptive control method and system.For the frequency deviation of virtual synchronous generator primary frequency modulation in off-grid mode, the problem that traditional secondary frequency modulation is difficult to consider regulation rapidity and suppress overshoot, the application is divided into two stages with the zero point of frequency change rate as boundary on the basis of traditional VSG secondary frequency modulation active ring integral feedback: the first stage adopts fixed large integral coefficient to suppress frequency drop quickly, the second stage dynamically adjusts integral coefficient based on power deviation and frequency deviation integral, while trigger signal and key parameter design are completed.Compared with the traditional method, the application can realize frequency no-error regulation, effectively consider fast response and overshoot suppression, significantly improve the dynamic stability and operation safety of off-grid VSG under load disturbance, suitable for frequency control scene of high proportion renewable energy grid-connected microgrid, with wide application prospect and practical significance.

The invention relates to the technical field of SMT, and discloses an SMT quality control method and system, and the method comprises the steps: calculating a PCB rotation deviation angle and a PCB translation deviation, and superposing the PCB rotation deviation angle and the PCB translation deviation for a target mounting point coordinate, and obtaining a component position deviation value; when the position deviation value of the component exceeds an allowable deviation threshold value, calculating an additional displacement value generated by the rotation action, and deducting the additional displacement value from the position deviation value of the component to obtain a comprehensive compensation displacement value; and a rotation instruction is sent to a rotating head servo motor according to the component position deviation amount, a stepping pulse signal is sent to a gantry stepping motor according to the comprehensive compensation displacement amount, and a rotating head and a gantry execute compensation actions in parallel to complete component alignment. The problem that in the prior art, fixed coordinate mapping cannot adapt to PCB position changes is solved, the double-gantry cooperation efficiency is improved, and the overall production period is shortened.

The invention discloses a self-adaptive control method, system, equipment and medium for a perfluorohexanone microcapsule crosslinking process, and belongs to the technical field of microcapsule preparation, and the method comprises the steps: collecting dielectric spectrum data through a multi-electrode array, and calculating the crosslinking completion degree based on the real part and imaginary part ratio change rate in combination with spatial gradient decoupling; meanwhile, temperature data are collected to calculate the temperature gradient, and the crosslinking completion degree and the temperature gradient are subjected to coupling analysis to obtain a difference degree distribution matrix; calculating the electric field compensation amount based on the space gradient relation of the difference degree, and optimizing a carrier delivery scheme by combining the electrode array physical constraint and the carrier diffusion effect; after delivery, dielectric change is detected, a space selective electric field is applied, and self-adaptive control is achieved through circulation detection and convergence judgment. According to the invention, spatial distributed detection of the crosslinking state is realized, a non-uniformity evaluation method considering the influence of a temperature field is established, a differential control strategy based on spatial coordination and diffusion pre-compensation is provided, and a closed-loop adaptive optimization mechanism is formed.

The present application relates to the technical field of motor anti-shake, and particularly relates to a vehicle motor anti-shake control method and system, a vehicle and electronic equipment, comprising: acquiring motor speed and demand torque in real time, and calculating time sequence indexes and frequency domain indexes of the motor speed; combining the collected motor speed, demand torque, time sequence indexes and frequency domain indexes into a state vector; inputting the state vector into a pre-trained neural network model, and outputting a compensation torque; superimposing the compensation torque and the demand torque to generate a total torque and transmit the total torque to a motor controller to perform torque control; wherein the training process of the neural network model comprises building an offline simulation environment, offline training a reinforcement learning model and online fine-tuning the model. The present application can realize motor anti-shake function, reduce calibration difficulty and cost, reduce loss, can be online fine-tuned and adapted to a real vehicle, and ensure control effect.

The application discloses a method for suppressing speed fluctuation of a direct-current brushless motor, and relates to the technical field of motor control. The method collects three-phase current, bus voltage, rotor position signal and actual speed signal during operation of the direct-current brushless motor, and performs synchronous separation on a speed error signal. A speed fluctuation mapping model is established according to a preset electric angle interval, and corresponding compensation coefficients are configured for different electric angle intervals. A disturbance feedforward compensation amount is generated based on a disturbance component, and a commutation suppression amount is generated based on a periodic fluctuation component. The speed loop control parameters and the current loop control parameters are adjusted according to the current speed fluctuation amplitude and the current ripple level. The disturbance feedforward compensation amount, the commutation suppression amount and the adjusted speed loop control parameters and current loop control parameters are combined into a final control amount, which is output to an inverter driver. The method can take into account load disturbance suppression and commutation ripple suppression, and improve the speed stability and long-term operation disturbance resistance under low-speed heavy-load working conditions.

The invention relates to the technical field of light regulation and control, in particular to a panel lamp integrated with a three-gear dial switch for adjusting color temperature, which is characterized in that an all-time lamp bead operation monitoring system is constructed, the abnormal operation state of equipment is recognized and early warned in time, the risk of lamp bead damage is avoided, and the overall service life of the panel lamp is prolonged. Based on standardized luminous decay data calibration, grading color temperature fine adjustment adaptive to the whole life cycle of the lamp beads and a stable stepped current adjustment scheme, precise color temperature compensation after luminous decay is achieved, the problems of sudden color temperature change and excessive compensation are avoided, and meanwhile, through multi-unit collaboration, the color temperature compensation precision is improved. The full-process automatic management and control of the panel lamp from data acquisition, state judgment to color temperature adjustment is realized, the manual maintenance cost is reduced, finally, the high-quality panel lamp which is convenient to operate, accurate in color temperature, stable in operation and adaptive to long-term use requirements is provided for a user, and the defects of the traditional technology in color temperature regulation and control and equipment management of the double-color-temperature panel lamp are overcome.

The application discloses a kind of low-voltage complete set reactive power compensation device's self-adapting switching control method, specifically relates to low-voltage distribution reactive compensation control technical field, the voltage, current, power factor, reactive power, harmonic parameter and the capacitor capacity that has been put into of acquisition low-voltage bus, based on power factor determines conventional compensation demand quantity;According to the short-time change characteristics of voltage, current and reactive power, load mutation precursor value is generated, and harmonic impedance close value is generated according to harmonic parameter and the equivalent impedance change after capacitor input;The switching prediction ability result is obtained by comprehensive evaluation of the two, and the state that the switching prediction ability is satisfied and the state that the switching prediction ability is insufficient are divided;When the switching prediction ability is satisfied, it is switched according to conventional compensation demand quantity, and when the switching prediction ability is insufficient, the compensation capacity, switching interval and capacitor branch are dynamically adjusted and then switched in stages;The application can reduce mis-switching, over-compensation, harmonic amplification and capacitor branch overcurrent risk, improve compensation stability.

An optical device deformation compensation method and system, and a photolithography machine, wherein the optical device is used to transfer a pattern on a mask to a wafer, the optical device deformation compensation method comprises: determining a region with aberration in an actually formed pattern on the wafer according to a difference between the actually formed pattern and a preset pattern; obtaining a deformation compensation amount of a corresponding region of the optical device according to an actual aberration in the region with aberration; and generating a corresponding compensation control signal according to the deformation compensation amount of the corresponding region of the optical device, and controlling a corresponding compensation device to compensate the corresponding region of the optical device. By using the above scheme, the local deformation of the optical device can be accurately compensated, thereby improving the imaging quality of the optical device.

The present invention discloses a control method and system for reducing the error deflection angle of a double-screw worktable, which belongs to a control or regulation system, solves the problem of worktable deflection in the double-screw feeding system in the prior art, and has the beneficial effect of effectively reducing the deflection of the worktable and improving the target accuracy of the workpiece. The specific scheme is as follows: a thrust compensation device for reducing the error of the double-screw worktable, wherein the thrust compensation device is arranged in a through groove of a slider of the worktable; a data processing unit estimates the current of the motor on the d-axis and the q-axis, the angular velocity of the motor and the load torque of the motor through a filter, and obtains the error deflection angle of the worktable according to the real current of the motor on the d-axis and the real current of the motor on the q-axis, the real angular velocity of the motor and the real load torque of the motor; a controller obtains the force that the thrust compensation device needs to output according to the error deflection angle of the worktable; the controller controls the action of the thrust compensation device to push the worktable to deflect in the opposite direction.

This utility model relates to the field of high-voltage power transmission and distribution technology, and discloses an adjustable-capacity high-voltage series compensation device, including a core compensation unit, a bypass protection unit, a damping circuit, and a control system. The core compensation unit has at least two parallel capacitor branches controlled by independent switching switches for step-wise adjustment of the compensation capacity. The control system includes a safety interlocking system, which includes a first interlocking module and a second interlocking module that are independent of each other. The first interlocking module is used to forcibly lock all independent switching switches in the open state when the bypass switch is closed; the second interlocking module is used to prohibit operation of the incoming and outgoing line isolating switches of the device when the bypass switch is not closed. This utility model, by combining hardware forced interlocking with intelligent control, eliminates the risk of misoperation and significantly improves the safety, reliability, and adaptability of the device operation to the power grid.

The invention discloses a method and device for determining the compensation capacity of a unit and electronic equipment, and relates to the field of power systems, and the method comprises the steps: obtaining the original installed capacity of each generator set in a generator set of a power system; setting a target power shortage duration expected value, and performing multiple iterations on the target function according to the target power shortage duration expected value, the original installed capacity of each generator set and the original load of the power system; after it is detected that the target function enters the iterative convergence state, taking a compensation capacity adjustment coefficient determined by the target function in the iterative convergence state as a target coefficient; and determining the compensation capacity of the generator set according to the target coefficient and the original installed capacity of each generator set. The technical problem that the compensation scale is disjointed from the actual demand of the system due to the fact that it is difficult for a capacity compensation mechanism to ensure that the compensated power generation capacity just meets the reliability standard of the power system in the prior art is solved.

The invention discloses an intelligent jig control method integrating multi-dimensional sensing detection and technological parameter closed-loop regulation and control, and particularly relates to the technical field of intelligent jig control. A space coupling description set reflecting the influence relation of local regulation on the global situation is constructed, and the independent working condition characteristics of each pinch point are extracted; real clamping change caused by local adjustment and passive response caused by elastic force transmission of a workpiece are effectively distinguished, and the system can sense the diffusion trend of local parameter change in a multi-station system and the potential clamping unbalance evolution direction in advance by introducing a cross-station adjustment influence matrix and a cooperative stability evaluation quantity. Therefore, unified constraint and coordinated correction are carried out on the process parameter adjustment instruction, and force chain oscillation and state divergence caused by simultaneous adjustment of multiple stations are prevented.

The invention relates to the technical field of grid compensation power grid transformation, and discloses a dynamic compensation type power grid transformation system applied to micro-grid connection, which comprises a power grid data acquisition module and a power grid transformation control module. According to the dynamic compensation type power grid transformation system applied to microgrid grid connection, a voltage deviation value, real-time active power, apparent power and real-time reactive power are calculated according to collected real-time voltage data, real-time current data and real-time power factor data; the method comprises the following steps: calculating a voltage deviation value, real-time active power, apparent power and real-time reactive power, calculating a voltage compensation value according to the voltage deviation value, the real-time active power, the apparent power and the real-time reactive power, determining a required compensation amount by utilizing the voltage deviation and a voltage proportion so as to obtain the compensation amount required in a grid-connected process, and cleaning collected original data and then calculating to obtain the compensation amount required in a grid-connected process. And real-time compensation is carried out according to various actual parameters, so that the precision of calculating and executing the compensation amount is improved, and excessive compensation and insufficient compensation are avoided.

The present invention provides a method for preventing arc discharge from occurring in a lower electrode assembly and a plasma processing device, the method comprising: measuring a DC self-bias voltage of a substrate to obtain a corresponding self-bias voltage measurement value; calculating a self-bias voltage compensation value based on the self-bias voltage measurement value; applying a first DC voltage to the lower electrode assembly, the voltage value of the first DC voltage being the self-bias voltage compensation value, so as to achieve a voltage difference between the lower electrode assembly and the substrate being less than a preset first threshold value. The advantage is that by applying a first DC voltage having a voltage value of the self-bias voltage compensation value to the lower electrode assembly, the voltage difference between the substrate and the lower electrode assembly is effectively reduced, the probability of arc discharge occurring in the lower electrode assembly during high aspect ratio etching is greatly reduced, and the safety of substrate processing is improved.