265 results about "High voltage transformer" patented technology

The invention discloses a capacitive voltage transformer for a gas insulated substation, which comprises a capacitive voltage divider and an electromagnetic unit, the capacitive voltage divider comprises a high-voltage capacitor C1 and a medium-voltage capacitor, the medium-voltage capacitor comprises a medium-voltage capacitor C21 and an externally connected medium-voltage capacitor C22, and the capacitance of the medium-voltage capacitor C22 is greater than that of the medium-voltage capacitor C21; the electromagnetic unit is connected with the capacitive voltage divider, an intermediate transformer and a compensation reactor are arranged in the electromagnetic unit, a full-shielding high-voltage shielding cover is arranged outside a high-voltage coil of the intermediate transformer, a damper and an overvoltage protector are arranged outside the electromagnetic unit, and the damper and the overvoltage protector are placed in an external junction box. The problem that in the prior art, an extra-high voltage transformer is low in lightning impulse overvoltage tolerance capacity is solved, the impulse overvoltage tolerance capacity is improved, and the breakdown risk is reduced.

The invention relates to the technical field of power equipment state monitoring, and discloses an extra-high voltage transformer partial discharge signal denoising method and system.The method comprises the steps that firstly, the high-frequency interference energy proportion is detected in real time, the wavelet packet decomposition layer number is dynamically adjusted, and the high-frequency interference fine isolation capacity is improved; a clustering combination threshold value is dynamically adjusted based on a noise cluster proportion, and an interference frequency band is accurately identified; and finally, reconstructing the signal through an inverse wavelet packet, and carrying out optimized output. According to the method, the signal-to-noise ratio can be remarkably improved in a complex noise environment, the pulse detection rate is improved, meanwhile, real-time optimization is achieved through sliding window processing and FPGA acceleration, and efficient and reliable technical support is provided for online monitoring of the insulation state of the extra-high voltage transformer.

The invention provides an X-ray high-voltage generator. The X-ray high-voltage generator comprises a resonance module; wherein the resonance module comprises a first inductor, a first capacitor and a second inductor which are connected in series at a primary winding of the high-voltage transformer; the first inductor and the second inductor form a common mode inductor, and the common mode inductor is an annular hollow inductor. According to the X-ray high-voltage generator provided by the invention, the problems of magnetic saturation risk, temperature sensitivity, magnetic core eddy current loss and the like of an existing resonance circuit are solved.

The invention relates to a high-voltage transformer series resonance withstand voltage test system and an automatic tuning method, and relates to the technical field of high-voltage electrical equipment testing, and the system comprises a control module, a signal generator, a resonance circuit, a data acquisition module and a safety protection unit. The method comprises the following steps: initializing system parameters; automatically searching and locking an optimal resonant frequency point; executing a withstand voltage test at the resonance point and monitoring data; and automatically analyzing data and judging performance. According to the invention, through full-closed-loop automatic control, rapid and accurate locking of the resonant frequency and intellectualization of the test process are realized, and the problems of low efficiency, poor precision and insufficient safety of a traditional method are effectively solved. The device has the outstanding advantages of high adaptive capacity, reliable test result and safety and convenience in operation, and is particularly suitable for high-efficiency and accurate standardized test on the insulating properties of various high-voltage transformers in an electric power system.

The invention discloses a preparation method of anti-aging cellulose insulation paper, and belongs to the technical field of oil paper insulation for electrical equipment. The problems that in the prior art, the polymerization degree of cellulose insulation paper in an oil-paper insulation system is greatly reduced, so that aging is caused, the insulation performance is reduced, and the service life is shortened are solved. The preparation method comprises the following steps: firstly, pre-treating natural color softwood pulp, grinding the softwood pulp to different degrees, and mixing the softwood pulp; secondly, purifying the mixed paper pulp, screening out fine fibers, and replacing the screened-out fine fibers with aramid nanofibers to prepare mixed paper pulp containing the aramid nanofibers; adding the mixed paper pulp containing the aramid nanofibers into a sheet making machine, performing dehydration forming and drying to obtain raw paper, and performing calendaring to obtain the cellulose insulation paper. The aging resistance and the insulating property of the cellulose insulating paper are remarkably improved, and the performance requirements of the insulating paper for the ultra-high voltage transformer can be met.

The invention provides an extra-high voltage data fusion analysis method and system, and relates to the technical field of data fusion analysis, and the method comprises the steps: deploying a sensor and a collection terminal, carrying out the data collection, carrying out the unified time calibration and quality measurement based on the collected data, carrying out the channel credibility initial value calculation, and carrying out the degradation strategy, and performing node power balance residual verification, traveling wave arrival time difference residual verification and thermoelectric consistency residual verification on the basis of a data acquisition result, performing online credibility updating on the basis of a thermoelectric consistency residual verification result, setting a participation weight interval on the basis of an online credibility updating result, and generating a physical consistency verification code. By deploying multiple types of acquisition terminals in an extra-high voltage transformer substation and a power transmission line channel and based on a unified time synchronization calibration, quality measurement and channel credibility calculation mechanism, the accuracy and timeliness of data acquisition can be ensured, and particularly, a channel credibility initial value is generated through weighted calculation of a time synchronization deviation, a packet loss rate and a signal-to-noise ratio.

The invention discloses an extra-high voltage transformer fault diagnosis method based on a knowledge graph. The method comprises the following steps: 100, establishing a mapping relation table of an extra-high voltage transformer fault type, a corresponding state quantity and a characteristic quantity; 200, constructing a knowledge graph based on the mapping relation table; 300, node information in the knowledge graph is converted into node embedding vectors, and modeling is conducted on the structure of the knowledge graph through an adjacent matrix; 400, based on the adjacent matrix and the node embedding vector, extracting a fault node feature vector and a feature quantity node feature vector of the knowledge graph; and 500, based on the fault node feature vectors and the feature quantity node feature vectors, calculating the conditional probability that the fault occurs in the fault mode corresponding to each feature quantity, and based on the conditional probability that the fault occurs in the fault mode corresponding to each feature quantity, obtaining the total probability that the fault occurs in the fault mode.

The invention provides an extra-high voltage transformer temperature field rapid calculation method, which comprises the steps of determining an input characteristic quantity according to a flow thermal coupling principle and a transformer type, establishing a simulation model, solving an equation set by utilizing a finite volume method to obtain an output characteristic quantity, carrying out normalization processing on the output characteristic quantity, forming a sample set through point cloud processing, and calculating the temperature field of an extra-high voltage transformer. The method comprises the following steps: randomly dividing into a training set and a test set, constructing a U-net + + neural network, taking a mean square error as a loss function, carrying out grouping test on key hyper-parameters, determining an optimal combination, inputting the constructed training set into the U-net + + neural network for iterative training, and carrying out supervised learning by taking an output characteristic quantity as label data. And when the calculation precision meets the requirement, obtaining an optimal model, and carrying out validity verification on the optimal model by utilizing a new working condition in the test set. According to the method, the calculation efficiency is improved, equipment can be protected from interference, and the safety and reliability of data are ensured.

This system monitors and controls power receiving and transforming equipment installed on the electrical pathways from the power supplier to multiple loads. It prevents electrical accidents that could lead to fires by monitoring and controlling the step-down and distribution transformers installed in the power receiving and transforming equipment, i.e., the high-voltage transformers, and electrical equipment such as distribution boards and panelboards installed on the electrical pathways after the voltage has been stepped down by the high-voltage transformers in the power receiving and transforming equipment. The system constantly monitors the temperature of the high-voltage transformers and the instantaneous current flowing through the electrical pathways of electrical equipment such as distribution boards and panelboards installed on the electrical pathways after the voltage has been stepped down by the high-voltage transformers, and cuts off the power supply to the loads if the temperature of the high-voltage transformer exceeds a predetermined value, or if the instantaneous current flowing through the electrical pathways of the electrical equipment exceeds a predetermined value.

The utility model relates to an electric flame stove, which comprises a case, a driving module, a voltage doubling rectifying module, a burner, a metal shell and a high-voltage transformer, wherein the burner is arranged on the case; the metal shell is arranged in the case and is provided with a containing cavity; the high-voltage transformer is used for being connected with input voltage; the driving module is connected with the furnace end through the high-voltage transformer and the voltage doubling rectifying module, and the high-voltage transformer is located in the metal shell. The influence of a magnetic field generated by the high-voltage transformer on the voltage doubling rectifying unit and the interference of the magnetic field on external electric appliances can be eliminated, meanwhile, eddy current generated by the high-voltage transformer can promote the high-voltage transformer, and then the conversion efficiency of the high-voltage transformer is improved.

The invention discloses an iterative harmonic working point static verification method, electronic equipment and a storage medium, and belongs to the technical field of static verification, the iterative harmonic working point static verification method comprises the following steps: placing an optical electric field sensor and verification equipment in a Faraday cage; an alternating current source is connected to a high-voltage transformer, a power frequency electric field with known intensity is generated through a pair of parallel electrode plates, and an optical electric field sensor is located between the pair of parallel electrode plates; emitting polarized light to an optical electric field sensor waveguide, and loading an electric field signal to be measured on a light wave; converting the electric field signal into an analog electric signal through a photoelectric conversion circuit; and the digital signal processing circuit demodulates and calculates the numerical value of the measured electric field. Static working point calibration is performed through a power frequency electric field environment, and a linear working point of the sensor is controlled by using a laser wavelength tuning and iteration method, so that the stability and accuracy of the optical electric field sensor in a high-voltage electric field environment are improved.

The invention relates to the technical field of power equipment on-line monitoring and intelligent diagnosis, in particular to an extra-high voltage transformer multi-modal data conflict fault misjudgment analysis method based on a DS evidence theory and graph enhancement. According to the invention, under the unified time reference and the electromagnetic-thermal physical topology constraint, the consistency fusion of the three-mode data of electromagnetic, acoustic vibration and distributed optical fiber temperature is realized, and the layered suppression and traceable positioning are carried out on evidence conflicts caused by coupling uncertainty and transient noise in the fusion process. Therefore, reliable fault confidence evaluation is output, and an accurate misjudgment traceability basis is provided. A traceable fault confidence coefficient is output in a unified time reference and a physical topology constraint through an electromagnetic-thermal dynamic coupling map which is synchronously acquired by hardware-level three modes and is updated in real time along with working conditions, and a layered D-S evidence conflict suppression and traceability algorithm.

The invention relates to a high-altitude extra-high voltage transformer partial discharge test interference identification and suppression method, and belongs to the technical field of high-altitude region electrical equipment insulation state detection. In order to solve the technical problems that interference signals and real discharge signals are difficult to distinguish and the signal-to-noise ratio is low in the partial discharge test of the extra-high voltage transformer in the high-altitude environment, the method combines instantaneous zero-crossing density analysis and wavelet packet multi-scale feature extraction; according to the method, a multi-dimensional criterion fusing energy features, zero-crossing features, time-domain shape features and altitude correction factors is constructed, an adaptive interference discrimination rule is established, a frequency domain and time domain combined suppression strategy is adopted, various interference signals are effectively identified and suppressed, meanwhile, waveform and amplitude information of real partial discharge pulses is reserved to the maximum extent, and the suppression precision is improved. Therefore, the signal-to-noise ratio and the reliability of a partial discharge measurement result are remarkably improved, and key technical support is provided for accurate evaluation of the insulation state of the high-altitude extra-high voltage transformer.

The utility model discloses an electric flame stove capable of controlling a single plasma generator. The electric flame stove comprises a machine shell, a burner arranged on the machine shell, a control module and a plurality of voltage doubling rectifying units. Each voltage doubling rectifying unit comprises a high-voltage transformer, two diodes and two capacitors, the input end of the high-voltage transformer is electrically connected with the control module, the cathode of the diode D1 is connected with the anode of the diode D2 after sequentially passing through the capacitor C1 and the capacitor C2, one output end of the secondary side of the high-voltage transformer is connected with the node of the diode D1 and the diode D2, and the other output end of the secondary side of the high-voltage transformer is connected with the anode of the diode D2. And the other secondary output end of the high-voltage transformer is connected with a node between the capacitor C1 and the capacitor C2. According to the utility model, the independent voltage doubling rectifying unit is arranged, so that the single plasma generator can be independently controlled, and the position of firepower can be accurately adjusted, and therefore, the heating effect can be accurately controlled; and each voltage-multiplying rectifying unit boosts the voltage to the high voltage required by the plasma generator through the voltage-multiplying rectifying combination of the high-voltage transformer, the two diodes and the two capacitors, so that the output voltage of the high-voltage transformer is reduced, the load of the high-voltage transformer is reduced, and the failure rate of the high-voltage transformer is reduced.

The invention discloses an extra-high voltage transformer bushing transient temperature rise rapid prediction method, which comprises the steps of constructing a simulation model of an extra-high voltage transformer bushing, and simulating and extracting global node temperatures and corresponding working condition parameters of a bushing profile at multiple moments to form a data set; selecting global node temperature to perform orthogonal decomposition, and selecting first r-order modals to construct a modal matrix according to cumulative energy proportion truncation; projecting global node temperature in the data set to a modal space according to a modal matrix to obtain a modal coefficient vector as an output sequence, and performing sliding window on working condition parameters in the data set to form an input sequence; constructing a long-short-term memory network model, optimizing network hyper-parameters of the long-short-term memory network model, and training the model by adopting an input sequence and an output sequence to obtain a time sequence mapping model; and acquiring working condition parameters of the extra-high voltage transformer bushing in a to-be-measured time period, inputting the working condition parameters into the time sequence mapping model, predicting a modal vector at a future moment, and reconstructing transient temperature field distribution of the extra-high voltage transformer bushing in combination with inversion of a modal matrix.

The utility model discloses a high-voltage hand-hole-opening-free type transformer bushing structure which comprises an upper conducting rod, a capacitor core and a porcelain bushing which are sequentially and coaxially arranged from inside to outside, the top of the capacitor core is concentrically and coaxially sleeved with a supporting cap, the supporting cap is in limiting fit with the top of the upper conducting rod through a fixing pin, and the upper conducting rod is sleeved with the porcelain bushing. One side of the supporting cap is in equipotential connection with the capacitor core through a lead, the top of the porcelain bushing is detachably provided with a voltage-sharing sealing cover, and the voltage-sharing sealing cover is in sealing fit with the porcelain bushing and the supporting cap through sealing rings. A third metal gasket, a second metal gasket and a first metal gasket are sequentially and detachably arranged at the top of the pressure-equalizing sealing cover in the axial direction, the upper conducting rod sequentially penetrates through the third metal gasket, the second metal gasket and the first metal gasket and is in sealing fit with the third metal gasket, the second metal gasket and the first metal gasket through sealing rings, and a lower conducting rod is detachably and coaxially arranged at the tail of the upper conducting rod; the installation stability is ensured, and meanwhile, hand hole opening-free installation is conveniently achieved.

The utility model relates to an extra-high voltage transformer bolt connection energy discharge reinforcing structure, and belongs to the technical field of transformer equipment. According to the technical scheme, an energy discharging support is made of elastic materials and composed of an inner ring and an outer ring which are arranged inside and outside, the inner ring and the outer ring are arranged in a high-low mode and connected through a longitudinally-arranged connecting ring, and the whole energy discharging support is of a stepped ring-shaped structure; the inner ring and the outer ring are provided with a plurality of through holes distributed in the circumferential direction, the energy discharging support covers the bottom flange and the connecting flange, the inner ring covers the upper end face of the bottom flange, the outer ring covers the upper end face of the connecting flange and is connected with the upper end face of the connecting flange through reinforcing bolts, and the lower flange of the ascending flanged base is arranged on the upper end face of the inner ring. A connecting bolt penetrates through the lower flange, the inner ring and the bottom flange to fasten the ascending flanged base, the energy unloading support and the bottom flange together. The utility model has the positive effects that fault impact energy can be effectively and directionally released, the energy unloading bracket is broken, the main bolt is protected from being damaged, and the safety of the whole structure is ensured.

1. The name of the design product: high and low voltage pre-installed substation (for shield machine). 2. The use of the design product: a special power distribution cabinet designed for shield machine, which includes high voltage, transformer and low voltage three parts, among which the high voltage includes 12KV / 24KV system and the low voltage includes 400V / 690V system, which can be compatible with TN and low voltage system. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view 1. 5. The submitted view can clearly express, and the elevation view is omitted.

The invention discloses an extra-high voltage transformer side column folding screen installation structure and an installation method thereof. The installation structure comprises a side column folding screen body used for an extra-high voltage transformer side column. The side column folding screen body comprises a folding screen paperboard and a contraction band; two groups of folding screen paperboards are arranged, and a side column folding screen is formed between the two groups of folding screen paperboards; and the plurality of contraction bands are arranged on the two folding screen paperboards in a sleeving manner. According to the side column folding screen mounting structure for the extra-high voltage transformer, the iron core center and the lower end position of the folding screen paperboard are marked on the iron core pulling plate through a four-point overlapping method; center lines are marked at two ends of the folding screen paperboard; the positions of the supporting strips are marked on the folding screen paperboard; the positions of the contraction bands are marked on the outer side paperboards of the folding screen paperboards, the side column folding screen bodies are aligned when installed, and then installation of the side column folding screen bodies can be achieved.

The utility model discloses a direct-current high-voltage hydrogen furnace igniter, which is characterized in that a controller of the igniter outputs and controls the on-off state of a power field-effect tube Q1 through an external resistor-capacitor PWM (pulse width modulation) signal and a frequency signal, and generates a pulse signal controlled by a duty ratio according to an input reference voltage VREF and a feedback voltage VFB; a pulse signal is coupled to the grid electrode of the power field effect transistor Q1 through a resistor-capacitor connected in parallel. When the power field effect transistor Q1 is switched on, the current passes through the primary coil of the transformer T1. In the conduction period, high-frequency current generated by the power field effect transistor Q1 is transmitted to the secondary coil through the mutual inductance effect of the transformer T1. And the input voltage of the secondary coil of the transformer T1 is boosted to about 20000V high voltage. A high-voltage rectifying silicon column is arranged in the transformer T1, so that 20000v direct-current voltage is output, and the voltage is ignition voltage. According to the utility model, the operation risk can be reduced, the ignition safety of the hydrogen furnace is improved, and the interference to control equipment and surrounding electronic equipment is reduced.

The invention discloses a bus duct for high-voltage equipment connection and a high-voltage connection structure, and belongs to the technical field of high-voltage electrical equipment, and the bus duct comprises a housing which is internally provided with a channel penetrating through two ends, the channel is used for accommodating a bus bar, and the housing is an insulating material part; the multiple layers of bus bar groups are arranged in the channel at intervals in a layered mode, each layer of bus bar group comprises at least three bus bars, the at least three bus bars on the same layer are arranged at intervals, a gap is formed between the bus bar group and the inner wall of the shell, and the two ends of the bus bar group are located at the two ends of the shell respectively and used for being detachably connected with the high-voltage electrical equipment; the high-voltage connection structure comprises a bus duct, high-voltage power distribution equipment and a high-voltage transformer. Stable and reliable electrical connection is provided for high-voltage electrical equipment, it is ensured that the connecting position has high process quality, the heating phenomenon at the terminal head is effectively reduced, the occurrence rate of electrical faults is reduced, the technical requirement for operators is lowered, and meanwhile the construction cost is greatly saved.

The invention provides a low-temperature plasma double-sided processing device for organic fibers in prepreg equipment. The low-temperature plasma double-sided processing device comprises a high-voltage transformer, an ozone-discharging cooling fan, a pipeline, a dynamic balance high-hardness guide roller, an opening and closing cylinder, a low-temperature plasma processing station, a pneumatic processing station rack, an electrical cabinet and a supporting bracket. Wherein the low-temperature plasma treatment station is a core device of the device and comprises a dynamic balance discharge roller, discharge assemblies, an electrode assembly and the like, each discharge unit comprises 5-7 discharge assemblies, and the surface treatment can be carried out on organic fibers, so that the interface performance of the organic fibers and resin is improved; and the bonding strength of the resin and the organic fiber is improved. The maximum breadth of the applicable prepreg production is 700mm, and the speed of the applicable prepreg production line is 1m / min to 8m / min.

The invention discloses a portable X-ray machine for measuring osteoporosis, and relates to the technical field of medical equipment.The X-ray machine adopts 18-26 V wide-range low-voltage power supply, primary boosting is performed through a full-bridge inverter circuit and a high-voltage transformer, secondary boosting is performed through a single-side CW voltage doubling rectifying circuit, the output voltage ranges from 30 kV to 80 kV, and the tube current ranges from 0.1 mA to 1 mA. A pseudo dual-energy imaging technology is introduced, low-energy and high-energy X-rays are used for imaging respectively, artifacts are reduced through continuous multi-image taking and contrast synthesis, and the imaging quality is improved. And the overexposure risk of the CCD camera is reduced by adopting an accurate dose control and delayed exposure technology. And a glue sealing insulation design and a split type structure are adopted, so that the equipment volume is reduced, and the portability is improved. Through integration of multiple technologies, the portable X-ray machine which is efficient, safe, capable of reducing measurement errors and radiation cost is provided, and the portable X-ray machine is suitable for osteoporosis detection.

An electrostatic filter module for an air cleaner includes a housing having an installation space configured to be sealed at least against ingress of liquid. The installation space has a high-voltage connection and a connection for lower voltage. Arranged in the housing are a separation unit and an ionization unit arranged in the housing, and a high-voltage transformer is accommodated in the installation space of the housing.

The utility model discloses a depilation instrument power supply, and relates to the technical field of depilation instruments. Comprising a shell and a DC power interface arranged at any position of the shell, a PCB is arranged in the shell, a low-voltage transformer and a high-voltage transformer are arranged on the PCB, the low-voltage transformer and the high-voltage transformer are electrically connected with the DC power interface through the PCB, and a high-voltage capacitor is further included. And the high-voltage capacitor is electrically connected with the PCB and is arranged in the shell. According to the utility model, the high-voltage capacitor is installed in the power supply of the depilation instrument, and the high-voltage capacitor is completely isolated from the handheld depilation instrument in the physical structure, so that the potential electric shock risk caused by the fact that the hand is too close to the high-voltage electrical module when a user holds and uses the depilation instrument is avoided.

This invention discloses an iterative tuning operating point static calibration method, electronic device, and storage medium, belonging to the field of static calibration technology. The iterative tuning operating point static calibration method includes placing an optical electric field sensor and calibration equipment within a Faraday cage; using an AC source connected to a high-voltage transformer to generate a power frequency electric field of known intensity through a pair of parallel electrode plates, with the optical electric field sensor positioned between the two plates; emitting polarized light to the waveguide of the optical electric field sensor and loading the electric field signal to be measured onto the light wave; converting the electric field signal into an analog electrical signal through a photoelectric conversion circuit; and demodulating and calculating the measured electric field value through a digital signal processing circuit. Static operating point calibration is performed in a power frequency electric field environment, and the linear operating point of the sensor is controlled using laser wavelength tuning and an iterative method, improving the stability and accuracy of the optical electric field sensor in a high-voltage electric field environment.

The invention relates to the technical field of insulating materials, and discloses a flame-retardant electrical insulating paste and application thereof, the insulating paste is formed by independently packaging a component A and a component B; the component A comprises bisphenol A epoxy resin, polycaprolactone diol, aluminum diethylphosphinate, zinc borate, an epoxy group functionalized silane oligomer and the like; the component B comprises methylhexahydrophthalic anhydride and zinc acetylacetonate; a component A is prepared through a melt coating and thermal dilution process, and filler dispersion and interface modification are assisted by using molten polycaprolactone; according to the insulating glue, the process viscosity is effectively reduced by utilizing the phase change characteristic of polycaprolactone, a cured product is endowed with cold and heat impact toughness, a damp and heat aging resistant interface is constructed through the silane oligomer, and a high flame retardant grade is realized by combining a halogen-free flame retardant system. The product provided by the invention has excellent potting manufacturability, cracking resistance and aging-resistant insulativity, and is suitable for potting protection of a driving motor and a high-voltage transformer of a new energy automobile.

The invention discloses a heavy moving flatcar for an extra-high voltage transformer, and relates to the technical field of heavy moving flatcars, the heavy moving flatcar comprises a supporting plate, one side of the supporting plate is fixedly connected with a supporting column, and the upper side of the supporting column is fixedly connected with an alarm lamp used for giving an alarm when the weight is overweight and placed above the flatcar. One side of the supporting column is fixedly connected with a camera used for shooting the surface of the extra-high voltage transformer, the lower side of the supporting plate is evenly connected with four electric rolling wheels used for driving the flatcar to move through bearings, and the ten arranging mechanisms slide on the U-shaped sliding rail at the same time. Therefore, each arrangement mechanism without the extra-high-voltage transformers is sequentially driven to the position below a travelling crane of a worker, the worker can quickly place each extra-high-voltage transformer above a flat car, and the situation that the travelling crane regulates the extra-high-voltage transformers to move and place in different directions for many times is effectively prevented; and the phenomenon that the time for placing the extra-high voltage transformer above the flat car is prolonged is avoided.

The invention discloses a transformer area voltage monitoring method and device based on photovoltaic access, terminal equipment and a storage medium, and belongs to the field of transformer area voltage monitoring. The method comprises the following steps: acquiring rated voltage of each to-be-monitored power transformer area and a plurality of voltage acquisition data of each monitoring point in a preset time period; according to the voltage acquisition data and a rated voltage, determining a corresponding high grid-connected voltage frequency when the voltage acquisition data of each monitoring point is a high grid-connected voltage; taking the current monitoring point as a high-voltage monitoring point under the condition that the high grid-connected voltage frequency is greater than a preset high-voltage frequency threshold value; monitoring the number of high-voltage monitoring points in each to-be-monitored power transformer area; comparing the number of the high-voltage monitoring points with a preset high-voltage point number threshold value; and under the condition that the number of the high-voltage monitoring points is greater than a preset high-voltage point number threshold value, determining that the current to-be-monitored power transformer area is a high-voltage transformer area. According to the invention, the problem that the high voltage of the transformer area caused by photovoltaic access cannot be accurately identified in the prior art can be solved.

The utility model belongs to the technical field of filters, and particularly relates to a novel efficient high-frequency machine filter, which comprises an air switch, a large filter, a contactor, a high-voltage transformer, a high-voltage rectifier, a high-frequency oscillator, an ampere meter, a power transformer, a small filter, a touch screen and a programmable logic controller (PLC). Damage of high-frequency electromagnetic waves generated by a high-frequency oscillator on a power transformer, a filter, a touch screen and a PLC in the same line is reduced, current and voltage in a circuit have reverse high-frequency electromagnetic waves, the current and voltage are safely output to the PLC after secondary filtering of a large filter and a small filter, the PLC cannot be burnt down due to impact of the high-frequency electromagnetic waves generated by a high-frequency machine, and the service life of the PLC is prolonged. The PLC touch screen is free of interference and more accurate in control, and the high-frequency machine realizes automatic control of necessary components.