207 results about "Electrical engineering technology" patented technology

The invention discloses a power distribution network hierarchical cooperative operation control method for distributed photovoltaic local absorption, relates to the technical field of electrical engineering, and aims at solving the problem of local electric energy absorption of a power distribution area containing a large amount of distributed photovoltaic and flexible resources. Global scheduling is carried out on flexible resources and distributed photovoltaic in a transformer substation area on the basis of a day-ahead-day centralized optimization strategy and hierarchical-partition coordination control, an optimization result is applied to a real-time control stage, and optimized scheduling instructions are distributed from top to bottom; and the optimal operation of distributed photovoltaic local absorption in the transformer area is realized. Therefore, by adopting the power distribution network hierarchical collaborative operation control method for distributed photovoltaic local consumption, a novel power system in a complex operation mode can be accurately analyzed, and the photovoltaic consumption capability of the power distribution network is improved by collaborative optimization of flexible resources and an operation scheme of a distributed power supply; and the operation economy of the novel power system is improved.

The invention discloses a cable insulation space charge simulation method and device based on aging factor coupling, and relates to the technical field of electrical engineering. The method comprises the following steps: establishing a bipolar carrier charge transport model, wherein model parameters comprise a detrapping coefficient and a diffusion coefficient; sampling the cable insulation, and measuring the isothermal relaxation current of the sample to calculate the aging factor of the sample; measuring the actual carrier mobility of the sample by using a time-of-flight method; a detrapping coefficient is updated based on the aging factor, a diffusion coefficient is updated based on the actual carrier mobility, and an aging factor coupling type insulation charge transport model is obtained; and carrying out numerical solution on the aging factor coupling type insulation charge transport model to obtain simulation data of space charge distribution and local electric field change of cable insulation. According to the technical scheme, space charge distribution and local electric field change of cable insulation are accurately simulated, and scientific evaluation can be provided for the aging state of cable insulation.

The invention discloses a ship ladder braking and lift car leveling safety state monitoring system based on digital twinning, which relates to the technical field of mechanical and electrical engineering, and comprises a system integrated leveling monitoring module, which adopts a salt mist resistant fiber grating displacement sensor and a magnetic railing ruler-Hall array closed loop verification mechanism and is combined with an anti-corrosion stay wire encoder; high-precision leveling detection is realized; the vibration signal separation module effectively recognizes braking abnormity through a triaxial accelerometer and a self-adaptive signal processing technology; a dynamic twin adaptive engine is fused with the ship ladder dynamic model and a transfer learning algorithm, and control parameters are adjusted in real time; and the cross check logic module automatically reconstructs data when the sensor is abnormal, so that the reliability and the fault-tolerant capability of the system are ensured. According to the invention, the berthing position error of the lift car is controlled within a safety range under different loads, speeds and sea conditions of the ship ladder, so that the riding comfort and safety are improved.

The application is suitable for the electrical engineering technical field, and provides a high-voltage switch cabinet plum blossom contact contact state evaluation method, device and terminal equipment, the high-voltage switch cabinet plum blossom contact contact state evaluation method comprises the following steps: calculating the temperature rise limit value of the plum blossom contact under the current operating condition according to the equipment operating parameter of the high-voltage switch cabinet;Determine the minimum limit value of the contact pressure of the single contact finger of the plum blossom contact;Calculate the maximum limit value of the contact pressure of the single contact finger of the plum blossom contact;Based on the temperature rise limit value, the minimum limit value and the maximum limit value of the contact pressure of the plum blossom contact, the plum blossom contact contact state evaluation criterion is established.The application utilizes the contact state evaluation criterion, can effectively guide the equipment operation and maintenance personnel to carry out equipment operation and maintenance, and ensures the safe and good operation of the plum blossom contact.

The invention discloses a distributed energy storage charging multifunctional cooperative control method and system, and relates to the technical field of electrical engineering. The method comprises the steps of collecting original data of a power grid side, an energy storage side, a charging side and a photovoltaic side, performing abnormal value elimination, protocol conversion and data compression processing on the original data, and outputting standardized data; based on the standardized data, firstly performing energy storage safety hard constraint check to determine a safety state, then performing scene threshold adaptation according to a power grid load rate and a user charging emergency degree to output a scene type and basic charging power, and then generating a preliminary power instruction through a lightweight reinforcement learning algorithm; and finally, performing compliance judgment on the initial power instruction, and outputting a final power instruction. According to the invention, a closed-loop control architecture of data acquisition, dynamic decision, power execution and feedback correction is constructed to balance the three-party requirements of the power grid, charging and energy storage, so that the effects of improving the interaction reliability of the power grid and the charging experience of a user are achieved.

The invention discloses a method and system for improving the small disturbance stability of a converter grid-connected system, and relates to the technical field of electrical equipment and electrical engineering, and the method comprises the steps: respectively constructing sequence impedance models of a network-following converter and a network-constructing converter in the converter grid-connected system; the method comprises the following steps: acquiring voltage and current information of a grid-connected part in a grid-connected converter grid-connected system, and analyzing the stability of the grid-connected converter grid-connected system by adopting an impedance analysis method based on a sequence impedance model of the grid-connected converter; according to a stability judgment result, when the system is unstable, connecting the network-forming converter, enabling modulation voltage waveform information in a control link of the network-forming converter to pass through a feed-forward link of the network-forming converter so as to support a control loop of the network-forming converter, and combining a sequence impedance model of the network-forming converter, so as to obtain the stability of the network-forming converter. Constructing a sequence impedance model of the supported following grid type converter; and based on the supported sequence impedance model, an impedance analysis method is adopted to verify the improvement of the stability of the grid-connected system of the grid-connected converter.

The invention discloses an amorphous alloy motor operation efficiency monitoring method and system based on artificial intelligence, and relates to the technical field of electrical engineering, the system is composed of a plurality of functional modules, and the system comprises a multi-dimensional data acquisition module for acquiring motor operation multi-field coupling parameters, environment condition data and motor operation multi-field coupling parameters; comprise electrical coupling parameters, thermal coupling parameters and mechanical coupling parameters; the edge calculation module is used for preprocessing motor operation multi-field coupling parameters and environment working condition data, introducing multi-field coupling features and extracting multi-dimensional features and multi-sensor time sequence features; and the cloud artificial intelligence analysis module constructs a dynamic mapping model based on historical motor operation data by adopting an improved LSTM and Attention mechanism and fusing a Transform architecture, inputs multi-dimensional features into the dynamic mapping model, outputs an energy efficiency level, and fuses multi-sensor time sequence features by using a graph neural network based on the energy efficiency level.

The invention discloses a power grid impedance identification method based on model reference self-adaption, and belongs to the technical field of electrical engineering. The method comprises the steps of establishing a reference model, and adopting integral control to iterate the reference model. A three-phase grid-connected current estimation value is obtained by establishing a reference model, the three-phase grid-connected current estimation value tracks the sampled three-phase grid-connected current through integral control, and power grid impedance parameters in the reference model are iterated. And when the three-phase grid-connected current estimation value is consistent with the sampled three-phase grid-connected current, the iterative power grid impedance parameter in the reference model is the final power grid impedance identification value. According to the method, active injection harmonic disturbance is not needed, a complex signal processing method is not needed, grid-connected current control is not affected on the basis, and the power grid impedance identification result is accurate.

The invention belongs to the technical field of electrical engineering, and particularly relates to a dynamic intelligent control method and system for a variable-frequency speed regulation system, and the method comprises the steps: in the offline stage of the system, automatically setting the total rotational inertia and the optimal compensation gain of the system through injecting a test torque and monitoring critical oscillation; in the online operation stage, active electromagnetic power is calculated by collecting bus voltage and current, theoretical inertia power is calculated by combining mechanical angular velocity, and the difference value of the active electromagnetic power and the theoretical inertia power is used as a disturbance power observation value after low-pass filtering; a singular-point-free equivalent angular velocity is constructed by using a set minimum effective rotating speed threshold value, disturbance power is converted into disturbance torque, and the zero-division singular problem of a low-speed region is effectively avoided; and calculating a compensation current, carrying out dynamic amplitude limiting according to the residual current margin of the frequency converter, and superposing the residual current to a speed ring for output. According to the method, the problem of calculation divergence of traditional power disturbance observation in a low-speed region is solved, and disturbance suppression and robust control in a full-speed region are realized on the premise of ensuring system safety.

The present invention relates to the technical field of building electrical engineering. Provided is a moisture-proof distribution cabinet for building electrical engineering. The moisture-proof distribution cabinet for building electrical engineering comprises a cabinet body, a supporting mechanism, a positioning mechanism, a dust screen and a dehumidifying mechanism, wherein the dehumidifying mechanism moves back and forth on the upper part inside the cabinet body; the positioning mechanism grips and fixes the dust screen by means of two clamping plates that move towards each other; the supporting mechanism adjusts the height of the cabinet body by means of four supporting legs capable of telescopic movement; and the inner bottom of the cabinet body is provided with a connecting frame, a moisture-proof plate and absorbent cotton are slidably inserted into the connecting frame, and a heat conduction plate for drying the moisture-proof plate and the absorbent cotton is further provided inside the connecting frame. In the present invention, by means of the dehumidifying mechanism moving back and forth on the upper part inside the cabinet body, the dehumidification range is expanded; and the supporting mechanism is provided, which can be driven by a second electric motor to adjust the height of the cabinet body, thereby preventing long-term intrusion of moisture.

The invention discloses a network construction-following network energy storage hybrid power station control method and system, and belongs to the technical field of electrical engineering, and the control method comprises the steps: constructing a network construction-following network energy storage hybrid power station and grid-connected state space structure model based on the circuit topology and control strategy of the network construction-following network energy storage hybrid power station; constructing an H-infinity robust controller based on a state space structure model of the network construction-network following energy storage hybrid power station and grid connection; solving the H-infinity robust controller to obtain a to-be-solved matrix required by the H-infinity robust controller; verifying that a to-be-solved matrix required by the H-infinity robust controller meets the performance condition of the system; and outputting an H-infinity robust controller meeting the system performance, wherein the H-infinity robust controller is used for controlling the network construction-network following energy storage hybrid power station. According to the method, the state space structure model is constructed, the H-infinity robust controller is designed, the robustness of the system is remarkably enhanced, and the method has obvious advancement in the aspect of adaptability of a complex power system.

The invention belongs to the technical field of electrical engineering, and particularly relates to a power distribution network simulation deduction and load regulation and control method based on Internet of Things data, which comprises the steps of acquiring multi-source Internet of Things data and performing timestamp checking, topology consistency deduction and cross-source error reforming to form a standardized power grid state data set; constructing a cross-scale operation feature based on the data set, generating a panoramic operation situation through topology and time sequence alignment, inputting the panoramic operation situation into a reinforcement learning agent, executing exploration in a simulation environment to generate an extreme compound fault scene, extracting risk severity from the scene, constructing a risk evolution path, and obtaining a risk evolution result; the method comprises the steps of identifying key induction nodes and easy-to-diffuse links, constructing a defensive load regulation and control strategy oriented to a causal chain, performing multi-working-condition simulation verification on the strategy, constructing an optimized regulation and control strategy set based on simulation deviation, and driving a power distribution network control system to execute load regulation and control actions so as to improve system stability and risk suppression capability.

The application relates to the technical field of electrical engineering, in particular to an intelligent power measuring device for generator control, which comprises a generator, a power detector is arranged on one side of the generator, a connecting hole is formed in one side of the power detector, a connecting line is fixedly connected to the generator, the other end of the connecting line is used for being connected with the power detector, a connecting column is fixedly connected to the inside of the power detector, the connecting column is located on one side of the connecting hole, a rotating plate is sleeved on the connecting column, one end of the rotating plate is rotationally connected with the connecting column, the other end of the rotating plate is fixedly connected with a fixing column, and the fixing column is used for winding the connecting line on the connecting column; when the connecting line on the generator is connected with the power detector, the connecting line can be automatically wound on the connecting column under the action of the fixing column.

The application discloses a kind of distributed photovoltaic in-situ consumption power distribution network hierarchical collaborative operation control method, it is related to electrical engineering technical field, including for the power consumption problem of a large number of distributed photovoltaic and flexible resource in power distribution area, based on day-ahead-intra-day centralized optimization strategy and hierarchical-zoning coordinated control, flexible resource and distributed photovoltaic in substation area are globally scheduled, and the optimization result is applied to real-time control stage, from top to bottom for the distribution of optimized scheduling instruction is allocated, the optimal operation of in-situ consumption of distributed photovoltaic in area is realized.Therefore, using the above-mentioned distributed photovoltaic in-situ consumption power distribution network hierarchical collaborative operation control method, new type power system under complex operation mode can be accurately analyzed, the operation scheme of flexible resource and distributed power supply is optimized by collaborative optimization, the photovoltaic consumption capacity of power distribution network is improved, and the operation economy of new type power system is improved.

The utility model provides a cable bridge capable of being quickly assembled and disassembled, which belongs to the technical field of electrical engineering, aims to solve the problem that the existing cable bridge is relatively complicated to assemble and disassemble, and comprises a cable bridge box which is of a rectangular groove-shaped structure with a plurality of elliptical through holes formed in the front end surface and the rear end surface; the two quick connection assembly shells are arranged at the upper end parts of the front and rear end surfaces of the cable bridge box respectively; the unlocking button is movably connected to the end face of the outer side of the quick connection assembly shell; the upper end part of the box cover hinge is fixedly arranged on the lower end surface of the rear end part of the bridge box cover; the hinge supporting beam is fixedly arranged on the lower end face of the box cover hinge; the quick connection assemblies are arranged in the four quick connection assembly shells; and the protection assembly is arranged on the end face of the cable bridge box. The utility model has the comprehensive advantages of high-efficiency installation and maintenance, enhanced protection performance, flexibility and adaptability.

The application discloses a space charge distribution calculation method based on tunneling effect and hole extraction restriction, and belongs to the technical field of electrical engineering, and comprises the following steps: a one-dimensional finite element structure model is established, taking polymer material as a main body and electrodes as boundaries; a periodic polarity reversal voltage is applied at the electrode boundary by coupling Maxwell electromagnetic field theory and Nernst-Planck theory, and a recombination carrier injection model and a hole extraction restricted boundary condition are introduced, so that a polymer material space charge distribution model based on tunneling effect and hole extraction restriction mechanism is obtained; and the polymer material space charge distribution model is solved to obtain the space charge distribution and electric field distortion law of the polymer material under the conditions of strong electric field and polarity reversal. The method solves the problem that the existing space charge model cannot effectively depict the tunneling emission and hole extraction restriction effect at the electrode interface, and provides important support for the polymer insulation aging research under the conditions of strong electric field and polarity reversal.

The utility model discloses a disassembling device for electrical engineering fault diagnosis, which comprises a supporting table, a placing table is rotatably connected to the supporting table through a bearing, a supporting column is installed on the supporting table, a top supporting plate is installed on the supporting column, an electric push rod is rotatably connected to the bottom of the top supporting plate, and a motor is installed on the electric push rod. The bottom end of the electric push rod is fixedly connected with a disassembling assembly, and the disassembling assembly is installed on the supporting column on the right side, and relates to the technical field of electrical engineering, by arranging the disassembling assembly on the upper portion, a vertical screw on equipment can be stably disassembled, the stability of an electric drill can be guaranteed in the disassembling process, and the disassembling efficiency is improved. The disassembly and assembly of the screw are more convenient and labor-saving; and by arranging the inserting assembly on one side of the containing table, screws on the side face of the equipment can be disassembled and assembled, and the convenience and efficiency of bolt disassembling and assembling are further improved.

The invention relates to the technical field of electrical engineering, and discloses a DC power flow controller transient oscillation law analysis method, system, device and medium, and the method comprises the steps: obtaining the inertia characteristics of a sending end converter station, providing precise basic data for model building, and guaranteeing the accuracy and reliability of a model; a direct current power flow controller time domain model is established based on inertia characteristics, actual system dynamic behaviors can be truly reflected, and support is provided for frequency domain analysis; the establishment of the frequency domain model enables the transient characteristic analysis of the DC power flow controller to be more intuitive and convenient, and facilitates understanding and application; the transient characteristics can be accurately obtained by solving the frequency domain model, and a basis is provided for optimizing controller parameters and improving system stability. According to the method, the accuracy and efficiency of transient oscillation law analysis of the direct current power flow controller are improved, and guarantee is provided for stable operation and optimal control of a power system. The transient characteristics are deeply analyzed to facilitate understanding of the working principle and behavior characteristics, and scientific basis is provided for design and operation of a power system.

The invention belongs to the technical field of electrical engineering, and discloses an electricity-carbon market coupling linkage operation model construction and clearing method, which comprises the steps of constructing a unified clearing model of a spot market and a standby market of an electric power system and a carbon market clearing model; constructing a coupling relationship between the clearing models; and the spot market and standby market unified clearing model, the carbon market clearing model and the coupling relationship form an electricity-carbon market coupling linkage operation model. According to the invention, through fine modeling of clearing of the electricity market and the carbon market, an inter-market coupling linkage mechanism is integrated, an electricity-carbon market coupling linkage clearing model and a solving method are established, and a coupling linkage model and a clearing method of the electricity market and the carbon market under a carbon market mechanism based on carbon emission intensity are established. The method is beneficial for realizing coupling linkage simulation of the electricity-carbon market and guiding a supervision mechanism to formulate related market rules, so that the electricity market and the carbon market are enabled to operate efficiently and stably, and low-carbon transformation of the electricity industry is promoted.

The present application relates to the technical field of electrical engineering, and more particularly to a pumping unit well anti-theft device, which comprises: a direct-current variable sequence module, which transmits positive and negative voltages of direct current output by a rectifying module to two wire cores of a cable, randomly switches loops among all wire cores of the cable, and sends wire core information corresponding to the positive and negative voltages after switching to a direct-current inverter decryption module; the direct-current inverter decryption module is connected to a pumping unit well through a frequency converter, and is used to connect wire cores where the positive and negative voltages after switching are located to positive and negative voltage direct-current busbars corresponding to the frequency converter according to the received wire core information. The present application solves the problem that the power transmission cable of the oilfield pumping unit well is stolen, which brings safety hazards to production and causes economic losses. The existing anti-theft method mainly relies on equipment inspection personnel to find the stolen power, and manual cutting is required when the power is stolen, which is delayed and cannot fundamentally solve the problem of power theft.

The invention relates to the technical field of electrical engineering, in particular to a power distribution power cabinet and a using method thereof.The power distribution power cabinet comprises a base assembly, the base assembly is used for being connected with a power cabinet body so that the power cabinet body can be connected with an external power installation area through the base assembly, and the bottom of a protective film is connected with the outer edge of the base assembly; and the protective film wraps the power cabinet main body. In rainstorm weather, the unfolding height of the protective film is higher than the external water level, water is isolated outside and does not affect the power cabinet body, when the water level is high, the power cabinet body is integrally wrapped by the protective film, and an opening in the upper end of the protective film is closed through the control assembly. In this way, the protective film can wrap the power cabinet body in a closed state, and the protective film can be inflated, so that the impact force of solids in water flow on the power cabinet body is reduced.

The application discloses a T-shaped microstrip line capable of suppressing far-end crosstalk for specific frequencies and a design method thereof, and belongs to the technical field of electrical equipment and electrical engineering. The application mainly comprises the following contents: 1) taking parallel uniform microstrip lines as a starting point, calculating the parameters of the PCB parallel microstrip lines, and obtaining the line width, line length and line thickness of the PCB high-density layout; 2) a new microstrip line structure, i.e. a T-shaped microstrip line, is provided, a T-shaped protrusion is added to the inside of the parallel uniform microstrip line, the structural parameters of the T-shaped protrusion are a T-shaped short side a, a T-shaped long side b, a T-shaped pair length D and a number n, and the influence of different structural parameters on the far-end crosstalk is analyzed from the frequency domain; 3) the structural parameters are optimized for specific frequencies, the optimal T-shaped microstrip line is obtained through time domain and frequency domain simulation, and the crosstalk suppression effect is enhanced compared with other types of microstrip lines. The application has the advantages of low far-end crosstalk at specific frequencies, clear design method and high wiring density.

The present application relates to the field of electrical engineering technology, and provides a method and system for optimizing and scheduling an electric energy storage system based on reinforcement learning, in order to solve the problem that it is difficult to effectively evaluate and control the risk of battery aging during frequent charging and discharging, and it is difficult to meet the real-time scheduling requirements in the low computing power environment on the edge side. The method of the present application includes: obtaining the battery charging status and health status data of the electric energy storage system and the grid load and grid electricity price data of the industrial and commercial park to generate a state input data set; using a reinforcement learning agent to obtain charging and discharging scheduling instructions; allocating power to the electric energy storage system, the multi-port converter power interface and the park load to generate multi-source collaborative power flow data; combining historical operating data, using a reinforcement learning agent to optimize the charging and discharging scheduling instructions; and optimizing and scheduling the electric energy storage system according to the optimized instructions. The present invention realizes efficient, intelligent and adaptive optimization scheduling of the electric energy storage system in the industrial and commercial park.

The application discloses a transformer rectifier-based fault detection method and system, and relates to the technical field of electrical engineering, comprising the following steps: S001, a cross-frequency steady-state to dynamic continuous observation baseline is established under different frequency excitation conditions, a magnetic communication signal, a current signal and a temperature rise signal are synchronously collected, and a micro-amplitude polarization marker is injected, which is used for tracking energy flow and constructing a multi-parameter coupling graph with time evolution characteristics; S002, based on the multi-parameter coupling graph, a causal coherence decomposition is performed, the transient bending rate deviation of the magnetic hysteresis loop under frequency change is identified, the energy imbalance parameter generated by the magnetic flux response lag is extracted, and the potential instability area in the feedback link is calibrated. The application realizes multi-parameter coupling graph construction and causal instability identification, predicts energy abnormalities through counterfactual playback and frequency replacement, realizes rapid electromagnetic recoil extinction combined with reversible time grid and conjugate injection, and improves system safety and self-healing ability.

The utility model provides automatic drying device relates to electrical engineering technical field, include: drying cabinet, drying cabinet front side is hinged to be rotatory and is installed with two cabinet doors, drying cabinet top right side is fixed with a air intake pipe, and air intake pipe bottom is connected with a group of article support pipe, and article support pipe bottom is connected with a group of air outlet pipe, drying cabinet bottom inboard is fixed with a group of lower bracket, drying cabinet top left side is fixed with a air outlet pipe, and drying cabinet top inboard is fixed with an air outlet cover, and air outlet cover and air outlet pipe bottom end intercommunication. The device can guarantee that the article center position is heated and dries and makes moisture to scatter outward, and drying is more uniform.

The utility model discloses a power distribution module, which relates to the technical field of electrical engineering, and comprises at least two power distribution units and a first busbar, the at least two power distribution units are stacked and arranged at intervals, each power distribution unit is provided with a confluence terminal, the confluence terminal is bent to form a connecting part, and the connecting part is connected with the first busbar. The first busbar is connected with the connecting part of one confluence terminal of each power distribution unit through a connecting piece, and the connecting piece and the relays on the power distribution units are arranged in a staggered manner; in the technical scheme provided by the utility model, the connecting part of the confluence terminal and the relay in the power distribution unit are arranged in a staggered manner along the stacking direction of the power distribution unit, so that the connecting piece can be ensured not to interfere with the relay even if the connecting piece penetrates out of the connecting part in the installation process, thereby avoiding the puncture of the relay and causing potential safety hazards. By bending the confluence terminal, a part of the confluence terminal is located below the circuit board, so that the rationality of the structure of the device is ensured.

The utility model relates to the technical field of electrical engineering, in particular to a switching power supply device, which comprises a mounting seat, a switching power supply fixed on the mounting seat, and expansion circuits positioned on the left side and the right side of the switching power supply, power supply plectrum switches are arranged on the expansion circuits on the left side and the right side, and the power supply plectrum switches are electrically connected with the expansion circuits; the switching power supply is provided with a power supply change-over switch for switching strong current or weak current, and the power supply change-over switch is electrically connected with the switching power supply; the switching power supply is also provided with a switching operation mechanism; the switching operation mechanism is connected with the power supply plectrum switch and the power supply change-over switch in a matched mode so as to be switched to one of strong current output, weak current output or strong and weak current synchronous output according to use requirements. According to the utility model, multipath strong current and weak current can be stably output, and multipath requirements of a modern electric control system on different voltages can be satisfied; and meanwhile, the switching operation mechanism is arranged to freely switch the output of the strong and weak circuits, so that efficient, stable and safe power conversion and distribution are realized.

The invention discloses a high-precision detection device for electrical engineering, and relates to the technical field of electrical engineering, the high-precision detection device comprises a machine body and a magnetic suction connecting assembly, the magnetic suction connecting assembly is installed in the middle of the machine body, and the magnetic suction connecting assembly comprises a sleeve embedded in one side of the machine body. According to the high-precision detection device for the electrical engineering, through a mechanical structure of lifting of the lifting rod, fixing of the electromagnet and driving adjustment of multiple motors, a detection tool is integrated on the overturning plate and the wing plate which can be automatically adjusted, manual hand holding or contact of a detector is not needed, manual alignment is replaced by automatic adsorption and fixing of the electromagnet, and the detection efficiency is improved. And the lead screw sliding block mechanism automatically adjusts detection parameters, so that the core detection action is completed by replacing a person with a machine, and the dependence on manual operation is fundamentally eliminated.

The invention provides an aviation variable frequency motor insulation life prediction model modeling method and a motor insulation life prediction method, and relates to the technical field of electrical engineering, and the method comprises the steps: carrying out an accelerated aging test through a mode of adjusting a test temperature, a test air pressure and a test voltage amplitude in stages; adjusting the upper and lower limits of each test parameter according to the motor insulation failure time obtained by the accelerated aging test to obtain insulation accelerated aging test conditions; and selecting a test point in a range of insulation accelerated aging test conditions to carry out an accelerated aging test, and repeatedly executing expression fitting optimization operation and model verification operation until a prediction error between a prediction result of the life prediction model and a real result is smaller than a preset error threshold value. According to the aviation variable frequency motor insulation life prediction model modeling method and the motor insulation life prediction method provided by the invention, the insulation failure time under the coupling action of high voltage, high winding temperature and high-altitude low-pressure environment can be accurately predicted.

The utility model provides a state detection device for a power distribution cabinet, and belongs to the technical field of electrical engineering. According to the structure, a high-frequency current transformer, an ultrasonic sensor, an ultrahigh-frequency sensor and a signal amplifier are arranged on a main PCB, the ultrasonic sensor is electrically connected with the high-frequency current transformer and the ultrahigh-frequency sensor in sequence, the ultrahigh-frequency sensor is electrically connected with the signal amplifier, a main inserting rod and a main mounting plate are arranged on the main PCB, and the signal amplifier is electrically connected with the main inserting rod. The main insertion rod is in insertion connection with the machine body, the main installation plate is fixedly connected with the machine body, the data exchange module comprises an auxiliary PCB, the auxiliary PCB is provided with a wifi module, a controller, a data line interface and a memory card slot, and the wifi module, the data line interface and the memory card slot are electrically connected with the controller. The power distribution cabinet partial discharge signal acquisition device has stronger acquisition capability for partial discharge signals of a power distribution cabinet, can be interconnected and intercommunicated with a remote control end in real time, and is compact in structure and stable and reliable in operation.