1397 results about "Operating voltage" patented technology

The invention relates to the technical field of power system monitoring and fault diagnosis, and particularly discloses a fault diagnosis system of an electrical variable measurement insulator detection device. The system comprises a synchronous acquisition module, a multi-physical field feature extraction module, a self-adaptive fault diagnosis engine and a feedback module. By synchronously acquiring voltage harmonic waves, leakage current and temperature data, extracting feature vectors of coupling electric-thermal influence and performing two-stage collaborative diagnosis by using a dynamic threshold value and a mahalanobis distance, high-sensitivity and self-adaptive accurate identification and early warning of an early latent fault of the insulator are realized. According to the system, by constructing a synchronous data acquisition module and a multi-physical field feature extraction module, two key influence factors, namely an operation voltage harmonic component and an environment temperature, are brought into a diagnosis system in a quantifiable feature form for the first time.

The invention discloses a voltage-to-current circuit, a calibration method, a multi-range calibration method and a power supply, a power amplification unit adopts MOS tubes of different channel types to match with working voltages of opposite polarities, and a bias circuit is combined to superpose exclusive bias, so that the waveform adaptation limitation of a traditional circuit is broken through, and the voltage-to-current conversion efficiency is improved. Alternating current, direct current, triangular waves, square waves and other special waveforms can be stably output, and the adaptability is greatly improved; secondly, pure hardware signal transmission and feedback are carried out in the whole process, the intermediate link of MCU measurement-setting is omitted, multi-stage error accumulation is effectively reduced, output delay is remarkably reduced, and the response speed is higher; in addition, the current sampling feedback unit and the error amplification unit form closed-loop control, power amplification output current is sampled in real time and fed back for calibration, and the precision and stability of the output current are effectively improved. Meanwhile, the bias circuit accurately regulates and controls the conduction state of the MOS tube, the linearity and consistency of current output are improved, and the overall structure is simple and reliable.

The invention relates to the field of chip detection, and discloses a high-efficiency chip detection system and method, which are used for realizing long-term performance degradation detection of a chip. Comprising the following steps: synchronously acquiring power pin electric signals and chip surface thermal imaging data to generate an electrothermal coupling characteristic data set in a working state of a to-be-tested chip, and extracting impedance and heat conduction characteristic parameters through impedance spectroscopy analysis and thermal time constant calculation. And analyzing an internal signal transmission path based on impedance characteristic parameters to obtain path characteristic parameters, establishing a mathematical model of dynamic current and working voltage of the chip by combining the two, generating a system identification result, and finally generating a chip detection result and fault positioning information by integrating various parameters. According to the invention, system benchmark testing and environmental interference monitoring and compensation are carried out, and high precision and high robustness of a detection result are realized.

The invention relates to the technical field of medical instruments, and provides a control method and a control system of an electric anastomat, and the control method comprises the following steps: executing a self-checking instruction; triggering the cutting knife to trigger the switch; detecting a motor operation rotating speed, a motor operation current and a motor operation voltage for driving the cutting knife in real time; calculating a motor operation torque according to the motor operation rotating speed, the motor operation current and the motor operation voltage; the cutting difficulty degree is judged according to the motor operation torque; and according to the cutting difficulty degree, the operation rotating speed of the motor is controlled. According to the control method of the electric anastomat, by setting the self-checking mode and indirectly calculating the running torque, the technical problems of high equipment production cost and high use cost are solved, and meanwhile it can be ensured that bleeding is reduced.

The invention discloses an LDO (Low Dropout Regulator) circuit based on a level conversion and pre-adjustment module. The LDO circuit comprises a reference source, an error amplifier, a pre-adjustment module, a level conversion module, a power switch tube P1, a power circuit tube N1 and resistance feedback networks R1 and R2. The pre-adjustment module carries out voltage reduction processing on an input high-voltage power supply, and the level conversion module generates bias voltage according to an enable signal and the high-voltage power supply, controls a power switch and a switch in the operational amplifier, and ensures that the circuit is resistant to high voltage and extremely low in drain. The error amplifier adjusts the grid voltage of the power circuit according to the feedback and reference voltage difference value, and controls the current to stably output the voltage. And the resistance feedback network realizes closed-loop regulation of the output voltage. Under the condition that the LDO is enabled to be closed, the power tube can be ensured to be completely closed no matter the LDO is under the working voltage of 3V or 5V, so that the electric leakage condition of the LDO is greatly improved, and the LDO has the characteristic of low electric leakage.

The invention belongs to the technical field of automation control, and particularly relates to an intelligent cutting control method and system for a PVC foam sheet, and the method comprises the following steps: collecting and preprocessing cutting working condition data, the cutting working condition data including the measurement current of a main shaft motor, the regional temperature in a saw blade protective cover and the current real-time feeding speed; performing moving average filtering on the measurement current to obtain smoothed spindle current; and a thermal viscous resistance index model is constructed, and a thermal viscous resistance index representing the saw blade adhesion risk degree is calculated according to the smoothed main shaft current, the rated working voltage of a system main shaft motor, the real-time feeding speed, the effective cutting sectional area and the area temperature. According to the invention, the phenomenon of serious tooth pasting is eliminated from the source, the smoothness and flatness of the cutting surface of the plate are ensured, the saw blade always works in a proper temperature interval, the service life of a cutter is obviously prolonged, and the overall efficiency of an automatic production line is improved.

The invention discloses an intelligent voltage self-adaptive battery pack and a control method thereof. The battery pack comprises a plurality of battery packs, and each battery pack comprises at least one battery unit; the relay array is respectively connected with the plurality of battery packs, and each relay in the relay array is configured to be capable of partially or completely switching to a corresponding on-off state according to the working voltage of external equipment so as to change the connection mode of partial or all battery packs in the plurality of battery packs; and the battery pack can receive power from the external equipment or supply power to the external equipment in a self-adaptive manner according to the working voltage of the external equipment. The technical problem that an existing battery pack is limited to be suitable for various voltage devices is solved.

The invention relates to the technical field of memristors, and provides a chitosan-based memristor which comprises a substrate, a buffer layer, a composite dielectric layer and a top electrode which are sequentially stacked from bottom to top, the buffer layer is formed by spin-coating a PEDOT: PSS aqueous solution on the substrate and then carrying out heat treatment; the composite dielectric layer is formed by spin-coating the buffer layer with an ultrasonic composite solution formed by a graphene oxide aqueous dispersion and a chitosan acetic acid solution and then carrying out heat treatment. By adopting a collaborative architecture of the chitosan-graphene oxide composite dielectric layer and the PEDOT: PSS buffer layer, the prepared bio-based memristor has the effects of relatively high switching ratio, relatively low operating voltage and good performance stability. Meanwhile, based on stable high and low resistance states of the device, all seven basic logic operations including a NOT gate, an AND gate, an OR gate, a NAND gate, a NOR gate, an XOR gate and an XNOR gate are completely realized on a single bio-based platform, the function accuracy can reach 100%, and an unexpected effect is achieved.

The invention provides a power cabinet working condition evolution prediction method based on a physical time sequence orthogonal decoupling architecture, and the method comprises the steps: firstly constructing a multi-dimensional non-stationary signal system based on arc disturbance and load impact characteristics, and collecting the working voltage, temperature rise upper limit, rated and withstand current and other operation parameter data of a power cabinet; in the modal decomposition and screening process, a noise suppression mechanism and a singular information retention technology are utilized, and weakening of non-Gaussian arc interference and retention of working condition abrupt change characteristics are achieved while physically independent orthogonal modal components are separated out. And finally, constructing a double-flow decoupling prediction network based on a deterministic mechanism and data-driven cooperative work. Further, static safety hyperplane constraint is introduced in a parameter updating stage, and a feasible region self-adaptive adjustment mechanism is supplemented, so that the model parameters are subjected to limited optimization on a constraint manifold defined by an electrical safety boundary; by establishing a multi-target topological potential energy function, balance between prediction precision and physical consistency is dynamically coordinated.

The invention relates to a method (200) for operating a linear transport system (100), wherein the method comprises; Controlling a first energy transfer coil (123) of a motor module (117) of the stationary unit (103) with an operating voltage (U) to generate an alternating magnetic field by a control unit (119) of the linear transport system (100) in a control step (201), wherein a synchronization signal (S) is integrated into the operating voltage (U); Reading out a voltage (U_ind) induced by the alternating magnetic field in the second energy transfer coil (125) of the at least one moving unit (101) and detecting the synchronization signal (S) by a subcontrol unit (121) of the moving unit (101) in a readout step (203); and Performing a synchronization between the control unit (119) of the linear transport system (100) and the sub-control unit (121) of the moving unit (101) based on the synchronization signal (S) by the sub-control unit (121) of the moving unit (101) in a synchronization step (205). The invention further relates to a linear transport system (100).

The invention discloses a life prediction method and system for an integrated gate commutated thyristor, and is applied to the technical field of integrated gate commutated thyristors, and the method comprises the steps: obtaining the rated working voltage, the rated working temperature and the rated ripple current of a to-be-detected integrated gate commutated thyristor; performing Gall distance processing on the obtained real-time capacitance capacity, real-time voltage data, real-time ripple current and real-time temperature data to obtain a to-be-trained data set; obtaining a voltage correction factor, a temperature correction factor and a current correction factor; inputting the voltage correction factor, the temperature correction factor and the current correction factor into an electrolytic capacitor life estimation relational expression to obtain an electrolytic capacitor life estimation value; and inputting the to-be-trained data set and the electrolytic capacitor life estimation value into the driving life prediction model for processing to obtain life prediction data. According to the method provided by the invention, the problem that the life prediction precision is limited in the prior art can be solved, so that the life of the integrated gate commutated thyristor can be accurately predicted.

The invention discloses a band-gap reference circuit, a working method thereof and electronic equipment, and relates to the technical field of band-gap reference circuits. The circuit comprises a pre-voltage-stabilizing module; the starting module is electrically connected with the pre-voltage-stabilizing module; the band gap core module is electrically connected with the starting module; the operational amplifier module is electrically connected with the band gap core module and the pre-voltage-stabilizing module; wherein the band-gap core module is used for outputting a reference voltage source; the pre-voltage-stabilizing module is used for buffering power supply voltage to obtain working voltage and providing the working voltage for the starting module and the operational amplifier module, and the pre-voltage-stabilizing module is further used for feeding back the influence of fluctuation of the power supply voltage on the reference voltage source to the pre-voltage-stabilizing module for readjustment; the starting module is used for starting the band gap core module; and the operational amplifier module is used for performing negative feedback regulation on the reference voltage source. The circuit can provide a reference voltage source with high PSRR and low temperature drift.

The embodiments of the present disclosure provide a multifunctional portable power bank and system. The multifunctional portable power bank includes a controller and an interface assembly connected to the controller. When detecting the access of an electronic device, the interface assembly outputs a driving voltage to the electronic device to drive the electronic device to communicate with the controller. The controller identifies the device type and operating voltage of the electronic device according to the content of the communication, and controls the interface assembly to supply power to the electronic device according to the operating voltage. The above-mentioned multifunctional portable power bank and system can supply power to electronic devices without charging function, are applicable to different types of electronic devices, and save the cost of configuring rechargeable batteries in electronic devices and the purchase cost of users.

Described herein are electrochemically active-material structures comprising silicon and one or more inert elements, such that these inert elements are chemically and / or atomically dispersed. Also described are negative battery electrodes and lithium-ion electrochemical cells comprising such electrochemically active-material structures as well as methods of fabricating such structures, electrodes, and lithium-ion electrochemical cells. Some examples of atomically-dispersed inert elements include, but are not limited to, hydrogen (H), carbon (C), nitrogen (N), and chlorine (Cl). Unlike silicon, inert elements do not interact with lithium at an operating voltage of the negative battery electrode and therefore do not contribute to the overall cell capacity. At the same time, these inert elements help to mitigate silicon swelling by operating as a mechanical buffer, support structure, and / or additional conductive pathways. Such electrochemically active-material structures can be formed by reacting (chemically or electrochemically) one or more precursors that include silicon and corresponding inert elements.

The invention relates to the technical field of power equipment state monitoring, and discloses a transformer oil paper insulation frequency domain response online monitoring system which comprises an interface protection module, a modulation control module, a servo balance module and a diagnosis reconstruction module. The interface protection module extracts end screen leakage current and provides overvoltage protection; the modulation control module tracks the bus voltage phase and generates broadband modulation excitation voltage; the servo balance module generates a reverse servo current through closed loop feedback, counteracts a power frequency component in a leakage current so as to maintain a virtual ground state of a measurement node, and injects broadband excitation in a superposed manner; and the diagnosis reconstruction module synchronously acquires signals, reconstructs data in combination with time sequence information, calculates equivalent complex admittance by utilizing cross-correlation demodulation, and outputs complex capacitance and a dielectric loss factor. According to the invention, the operating voltage is used as a carrier wave, strong power frequency interference is eliminated through hardware servo, and safe online excitation is realized by matching with phase chopping, so that the difficult problem of weak broadband signal extraction is effectively solved, and combined monitoring and diagnosis are realized.

An electrostatic discharge protection circuit includes an NMOS transistor connected to a supply voltage pin through a first node and connected to a ground pin through a second node, an RC circuit connected in parallel with the NMOS transistor and including a capacitor and a resistor, and a clamping circuit connected in parallel with the resistor of the RC circuit and including a plurality of diodes; and a switch connecting the clamping circuit to a gate node of the NMOS transistor, wherein a number of the plurality of diodes is set based on a breakdown voltage and an operating voltage of an internal circuit to be protected by the ESD protection circuit, and the switch includes a PMOS transistor connecting the gate node of the NMOS transistor to the clamping circuit and a sub-RC circuit connected in parallel with the PMOS transistor and including a sub-capacitor and a sub-resistor.

The invention relates to a power-on loading or interchange self-adaption method for a cesium optical pump magnetometer, belongs to the technical field of quantum sensing and geomagnetic detection, and solves the technical problem that the excitation process is tedious during power-on loading or interchange of the cesium optical pump magnetometer in the prior art. Based on the current standard radio frequency power voltage and the standard radio frequency frequency voltage, hopping radio frequency power voltage is applied to the cesium lamp, and the cesium lamp is lightened through the hopping radio frequency frequency voltage; increasing the radio frequency power voltage to a first interval range to heat the cesium lamp, and applying a standard radio frequency frequency voltage until the cesium lamp is preheated; when the collected working voltage of the cesium lamp starts to be reduced, reducing the radio frequency power voltage to standard radio frequency power; and the radio frequency power voltage and the radio frequency frequency voltage are finely adjusted, so that the magnetometer outputs a Larmor signal with a stable waveform, and the radio frequency frequency voltage, the radio frequency power voltage and the cesium lamp working voltage at the moment are stored as optimal working points of the magnetometer. And a self-adaptive power-on loading or interchanging method of the cesium optical pump magnetometer is realized.

Voltage regulating devices for organic light emitting diodes (OLED) are provided. The voltage regulating device includes an operational amplifier and a voltage output circuit. The operational amplifier generates an output voltage. The voltage output circuit is coupled to the operational amplifier. The voltage output circuit is controlled by a selection signal to generate a control voltage selectively using a first operating voltage interval or a second operating voltage interval. A voltage value of the control voltage is related to a reference voltage of the OLED, and the selection signal is correspondingly generated according to the reference voltage of the OLED.

The embodiment of the invention discloses an all-solid-state battery positive electrode, a preparation method thereof and an all-solid-state battery, and the all-solid-state battery positive electrode comprises a positive electrode active material, a halide solid electrolyte and a liquid additive, the liquid additive is subjected to decomposition reaction in a working voltage interval of the positive electrode active material to generate a barrier layer in situ, and the barrier layer coats the surface of the positive electrode active material to isolate direct contact between the positive electrode active material and the halide solid electrolyte; the side reaction between the positive electrode active material and the halide solid electrolyte is inhibited, and the cycle performance of the battery is effectively improved. And lithium ion transmission between the positive electrode active material and the halide solid electrolyte is improved, so that the positive electrode capacity is favorably exerted, and the capacity of the battery and the rate capability are favorably improved.

The chemical formula of the positive electrode material is Naa (Ni2 / 5Fe1 / 5Mn2 / 5) bCacSrdCueTifLigZnhO2, a is greater than or equal to 0.95 and less than or equal to 1.1, b is greater than or equal to 0.75 and less than or equal to 0.9, c is greater than or equal to 0.006 and less than or equal to 0.007, d is greater than or equal to 0.003 and less than or equal to 0.004, e is greater than or equal to 0.03 and less than or equal to 0.05, f is greater than or equal to 0.08 and less than or equal to 0.12, g is greater than or equal to 0.008 and less than or equal to 0.012, and h is greater than or equal to 0.01 and less than or equal to 0.03. By doping calcium, strontium, copper, magnesium, titanium and zinc elements in the layered structure, the complex phase change of the positive electrode material in the charge-discharge cycle process is inhibited, and the cycle stability of the positive electrode material is improved; by regulating and controlling the molar weight of the doping element in the application range, the O3 type positive electrode material has high charge-discharge specific capacity and can maintain high working voltage.

The invention relates to the technical field of network management, in particular to a switch voltage intelligent monitoring and abnormity regulation and control method and system, and the method comprises the following steps: reading port current and power supply voltage register conversion power consumption, writing the port current and power supply voltage register conversion power consumption into a port meter, comparing the port meter with rated power, and reading input / output and mainboard interface voltage according to an identifier; and positioning continuous periodic voltage change drop nodes, and determining a propagation node sequence by combining sampling time. According to the invention, by reading data conversion of a port current register and a port power supply voltage register and according to a power consumption accumulation result, power supply state judgment is associated with port load change, node voltage change is compared and identified by combining a continuous sampling period, and a voltage drop node is identified by combining a working voltage reference value. And a voltage propagation node sequence is obtained according to the sampling time, and the initial position of the power supply path is identified and is combined with the input voltage of the redundant power supply for register state writing, so that a voltage change source has a path association judgment basis.

The present disclosure relates to the technical field of optoelectronics, and provides a chip for laser detection, a LiDAR, a vehicle, and a photodiode. The chip for laser detection comprises a substrate, an epitaxial layer, an operating circuit, and a protection circuit. The epitaxial layer is formed over the substrate. The operating circuit is formed on the epitaxial layer. The operating circuit comprises a first photodiode and is configured to detect incident laser at an operating voltage. The protection circuit is formed on the epitaxial layer. The protection circuit is connected in parallel to the operating circuit and comprises a second photodiode. The turn-on voltage of the protection circuit is greater than the operating voltage, and the impedance of the protection circuit when it is turned on is less than the impedance of the operating circuit when it is turned on. The present disclosure can reduce the degree of damage caused by electrostatic discharge to operating circuits in chips.

The utility model provides an intelligent power distribution system for a transportation mode. The intelligent power distribution system comprises a high-drive chip U1, a pre-drive chip U2, an MCU chip U3, an MOS tube Q1, an MOS tube Q2, a diode D1, a voltage-regulator tube D2, a comparator U4 and a resistor R5. The drain electrode of the MOS tube Q1 and the positive electrode of the diode D1 are electrically connected with a working voltage, the source electrode of the MOS tube Q1 is electrically connected with a load through the high-drive chip U1, the grid electrode of the MOS tube Q1 is electrically connected with the MCU chip U3 through the pre-drive chip U2, the negative electrode of the diode D1 is electrically connected with the input end of the comparator U4, the source electrode of the MOS tube Q2 and the negative electrode of the voltage-regulator tube D2, the output end of the comparator U4 is electrically connected with the MCU chip U3, and the output end of the voltage-regulator tube D2 is electrically connected with the MCU chip U3. The grid electrode of the MOS tube Q2 is electrically connected with the positive electrode of the voltage-regulator tube D2, the enabling end of the MCU chip U3 and one end of the resistor R5, and the drain electrode of the MOS tube Q2 is electrically connected with a load.

The invention discloses a full-bridge synchronous rectification circuit, which realizes self-driving of two PMOS (P-channel Metal Oxide Semiconductor) tubes of a full-bridge synchronous rectification structure through a gate-source clamping self-driving module, and controls gate-source voltages of the two self-driving PMOS tubes when an output voltage Vo is high, so that the gate-source voltages of the two self-driving PMOS tubes are always clamped in a voltage withstanding range of the two self-driving PMOS tubes, and the problem of overvoltage breakdown is solved. The working voltage range is expanded, and the circuit reliability is improved. In addition, the gate source clamping self-driving module can release excessive energy when the voltage of the rectification output end abnormally drifts high, the load regulation rate can be optimized, and the problem that the output abnormally drifts high can be relieved or avoided.

The invention provides a circuit for laser detection, a laser radar and a carrier, and relates to the technical field of photoelectricity. The circuit for laser detection comprises a working circuit and a protection circuit connected in parallel with the working circuit. The working circuit comprises a first photodiode and is configured to detect echoes under working voltage, the protection circuit comprises a second photodiode, doped ions of the second photodiode and doped ions of the first photodiode are distributed in the longitudinal direction, and the break-over voltage of the protection circuit is larger than the working voltage. And the impedance of the switched-on protection circuit is smaller than that of the switched-on working circuit. According to the invention, the degree of damage to the working circuit caused by electrostatic discharge can be reduced.

The invention discloses a high-energy sodium ion hybrid capacitor, which is characterized in that an active material of a positive electrode is a sodium ion battery type positive electrode material, an active material of a negative electrode is a carbon material with a high specific surface area, and an electrolyte is an organic ether electrolyte containing sodium ions; and the mass ratio of the active material of the positive electrode to the active material of the negative electrode is (1: 1)-(2.5: 1). The working voltage of the high-energy sodium ion hybrid capacitor is up to 4.1 V, the high-energy sodium ion hybrid capacitor has high energy density, high power density and tens of thousands of cycle stability, pre-sodium treatment is not needed in device assembly, and large-scale preparation is easy.

A reversible multi-voltage output mobile power supply disclosed by the present invention comprises a vehicle frame used as a bearing main body, a storage battery arranged on the vehicle frame and used for storing energy, and an inverter used for current inversion, the vehicle frame comprises a cavity frame, a pull rod, a handle and wheels, the pull rod is installed on the cavity frame, the wheels are installed at the lower edge of the cavity frame, and the handle is installed on the cavity frame. The wheels can rotate relative to the cavity frame. The technical problems that an existing device is poor in heat dissipation effect, single in output voltage and the like are solved, the inverter is additionally arranged on the mobile power source frame, a storage battery direct-current DC12V power source can be inverted to output AC220V working voltage, DC12V and DC24V working voltage can be output to the storage battery in a single mode or in a parallel connection mode or in a series connection mode, and the storage battery can be connected in parallel or in series. And the storage battery and the inverter are respectively placed in different cavities, so that the heat dissipation performance is good, and the photovoltaic module has the advantages of reasonable mounting structure, low manufacturing cost, relatively simple production process and long service life.

The application provides a split-gate flash memory and a manufacturing method thereof. The memory comprises a semiconductor substrate, has an active region and an isolation structure, and part of the surface of the isolation structure is lower than the surface of the active region to form a groove; a coupling medium layer covers the top and sidewall of the active region; a floating gate is located on the surface of the coupling medium layer and surrounds the top and sidewall of the active region and does not completely fill the groove; an inter-electrode medium layer is located on the surface of the floating gate; a control gate is located on the surface of the inter-electrode medium layer and fills the remaining part of the groove; a word line is located on the sidewall of the floating gate and the control gate; and a tunneling medium layer is located between the word line and the floating gate, the control gate and the substrate. The application enhances the control force by three-dimensionally surrounding the channel with the floating gate, reduces the risk of punch-through, increases the coupling rate by filling the groove with the control gate, reduces the operating voltage, and improves the reliability of the device.

This utility model relates to the field of control relay testing technology, and discloses a control relay testing device, including a power supply unit, a control unit, a first communication unit, a second communication unit, and a programmable adjustable three-phase power supply. The power supply unit provides the operating voltage. The control unit is electrically connected to the programmable adjustable three-phase power supply through the first communication unit, and controls the test voltage and test current output by the programmable adjustable three-phase power supply. The control unit acquires the test data of the control relay under test through the second communication unit. In actual use, the control unit of this utility model adjusts the voltage and current output by the programmable adjustable three-phase power supply through the first communication unit, thereby providing a corresponding test environment according to the actual application scenario of the control relay, ensuring the authenticity and reliability of the test results. In addition, during actual testing, the operator only needs to connect the control relay to the programmable adjustable three-phase power supply, which simplifies the test and reduces the workload.

The present application relates to the technical field of power system stability control, and is a steady-state voltage control method and system for reducing transient voltage instability risk of a new energy collection station, the method comprising: establishing a new energy collection station bus transient voltage model of a new energy sending end power grid after a DC bipolar blocking fault; setting a new energy collection station transient voltage instability limit of the new energy sending end power grid after the DC bipolar blocking fault; and setting a steady-state voltage control threshold for reducing the transient voltage instability risk of the new energy collection station bus based on the new energy collection station bus transient voltage model. The present application can achieve the purpose of reducing transient voltage instability risk by controlling the steady-state operating voltage of a high-proportion new energy sending end power grid without increasing dynamic reactive power compensation equipment. The present application is used to solve the problem of transient voltage instability caused by new energy off-grid of a new energy collection station of a DC sending end power grid after a DC fault due to excessively high transient voltage caused by excessively high steady-state operating voltage of the power grid.