116 results about "Transformer windings" patented technology

A pumped storage unit main transformer winding inter-turn short circuit fault diagnosis positioning method and system, comprising: pulse injection is carried out on the main transformer of the pumped storage unit in the shutdown state, and the voltage response waveform is obtained; the characteristic waveform is calculated, the different connection modes of the pumped storage unit main transformer winding are combined, whether the pumped storage unit main transformer winding exists fault and the fault phase are judged; the VMD decomposition optimization model and the NTEO wave head extraction optimization model with optimal parameters are constructed, and the instantaneous energy spectrum is obtained based on the model and any characteristic phase containing characteristic phase; the fault positioning formula is constructed based on the instantaneous energy spectrum, the fault positioning formula corresponding to the relationship between the characteristic phase and the fault phase in the voltage response waveform is selected according to the relationship between the characteristic phase and the fault phase, and the positioning of the fault coil is obtained. The method has high reliability, high fault diagnosis accuracy and small positioning result error, and can meet the needs of pumped storage unit main transformer winding inter-turn short circuit fault diagnosis and positioning in engineering.

A production apparatus and method for differentiated enameled wires used in transformer windings includes: a wire feeding module, a surface pretreatment module, a multi-nozzle spraying module, a curing module, a monitoring module, a wire take-up module, and a controller, arranged sequentially along the conductor's travel direction. The multi-nozzle spraying module comprises at least three independently controlled nozzles arranged along the conductor's travel direction, each nozzle being used to spray a different insulating material. This invention uses pre-stored process blueprints to convert the temperature and stress field distributions in different regions inside the transformer into material composition and thickness variation instructions along the conductor's length, which are executed in real-time during continuous production. In high-temperature regions, the thermal conductivity is increased by increasing the proportion of high thermal conductivity filler and appropriately thinning the insulation layer to reduce hot spot temperatures; in high-stress regions, the proportion of toughening agent is increased and the insulation layer is appropriately thickened.

The application relates to a stress distribution determination method, device and equipment of a transformer winding and a storage medium. The method comprises the following steps: in the case that a target transformer is detected to be faulty, the hoop stress and bending stress of a target winding of the target transformer are acquired, and the short-circuit current of the target transformer is acquired; the short-circuit current, the hoop stress and the bending stress are input into a distribution determination model to obtain the target stress distribution of different regions in the target winding. The method can improve the determination efficiency of the stress distribution of the transformer winding.

The embodiment of the application discloses a parameter acquisition method of an oscillation waveform detection system, relates to the technical field of power system control, and accurately acquires the equivalent resistance value, the equivalent inductance value and the equivalent distributed capacitance value of a winding of a transformer to be measured, the output voltage of a high-voltage direct-current power supply, the maximum input voltage of a data acquisition module, the maximum charging current value allowed by a charging detection loop and the like, and based on the indexes, the first capacitance value of a parallel capacitor, the second capacitance value of a voltage division capacitor, the third capacitance value of a measurement capacitor and the resistance range of a current limiting resistor in the oscillation waveform detection system are acquired, the uncertainty caused by empirical design is avoided, the quality of generated oscillation waveforms is ensured to be stable and controllable, consistent and reliable detection results on transformers of different capacities and voltage grades are ensured, and the accuracy and universality of the oscillation wave detection method in practical application are improved.

The application discloses a transformer on-load tap changer based on a phase selection technology and a gear switching method, which comprises a main circuit and a transition circuit connected with transformer winding taps, the main circuit comprises gear selection circuit and on-off circuit connected in sequence, the gear selection circuit comprises at least four relays for switching the working gear of the transformer; the on-off circuit is composed of vacuum circuit breaker VCB2, diode D2 and vacuum circuit breaker VCB4 connected in series; the transition circuit is formed by transition resistor R, vacuum circuit breaker VCB1 and diode D1 connected in parallel, and vacuum circuit breaker VCB3 connected in sequence, the transition circuit cooperates with the main circuit to realize the arcless switching of the transformer gear; all the vacuum circuit breakers are controlled to act by permanent magnet operating mechanisms, and the permanent magnet operating mechanisms are used to drive the vacuum circuit breakers to realize the fast on-off according to the voltage phase signal. The application controls the action of the vacuum circuit breaker by the phase selection technology and the conduction and cutoff characteristics of the diode, reduces the generation of arc, and prolongs the electric life.

The application discloses a transformer winding looseness fault diagnosis method based on an improved MPE and K-medoids algorithm, which is used for forming a transformer winding looseness MPE value criterion and realizing winding looseness fault diagnosis. The method steps are as follows: 1, measuring points are arranged on a transformer box body, vibration signals of each measuring point are acquired, and a vibration amplitude maximum measuring point D is selected as an optimal measuring point; 2, vibration signals of the transformer winding in different states are measured; 3, a particle swarm optimization algorithm is used to optimize parameters in a traditional MPE algorithm, so that the overall change of the MPE value is stable; 4, the MPE value of the measuring point D is calculated by using the optimized MPE algorithm; 5, the MPE values under two adjacent scale factors are selected as horizontal and vertical coordinates of a clustering coordinate system; 6, the K-medoids algorithm is used in the coordinate system to realize accurate classification of the transformer winding fault type; and 7, the MPE value criterion is summarized and formed, and a database is established. The method reduces the cross aliasing phenomenon of the traditional MPE algorithm, and realizes accurate judgment of the transformer fault type.

This invention discloses an active suppression method for background noise in transformer winding frequency response detection. The method includes: setting up a test circuit with the transformer de-energized, grounding all equipment grounding terminals and cable shielding layers; cutting off the excitation source output, scanning the entire frequency band using a response acquisition unit, and obtaining the background noise spectrum distribution through spectrum analysis; calculating the optimal excitation voltage and optimal sampling number for each test frequency point based on the noise intensity distribution; controlling the programmable excitation source to output the optimal excitation voltage point by point via a host computer, and controlling the response acquisition unit to collect data with the optimal sampling number; calculating the transfer function using the actual injection voltage and response voltage at each frequency point, and generating a denoised frequency response curve. This invention achieves adaptive adjustment of test parameters, suppresses interference from on-site background noise on frequency response detection, and improves the accuracy of test results.

This utility model discloses a winding structure for transformer production, belonging to the technical field of transformer production equipment. It includes a frame, with fastening plates slidably mounted on turntables on both sides of the shaft. A limiting plate is slidably inserted into the shaft. Uniformly distributed limiting grooves are formed on the outer walls of the left and right sides of the shaft. The inner side of the limiting plate is inserted into the corresponding limiting groove. A positioning slide is rotatably mounted at the end of the shaft, and the positioning slide can slide along the shaft. A positioning post is fixedly connected to the inner side of one end of the positioning slide. When the coil drum is fixed, the positioning post is inserted tightly to the top front of the limiting plate. This utility model achieves double limiting of the limiting plate, thereby enhancing the limiting and fixing effect of the limiting plate on the coil drum. It saves time and effort in operation, effectively improves the loading and unloading efficiency of the coil drum, ensures the stability of the winding process, and thus effectively improves the technical effect of improving the working efficiency of transformer winding.

This invention relates to an irregularly shaped multi-core winding wire and its manufacturing method. The invention comprises multiple irregularly shaped winding wire units, each including an irregularly shaped copper flat wire core and a first insulating paper covering the outer periphery of the copper flat wire core. The multiple irregularly shaped winding wire units are combined in a predetermined arrangement to form a multi-core structure, and one or more layers of second insulating paper are wrapped around the outer periphery of the combined structure. This invention enables sufficient oil channels to be retained between the turns of the transformer winding, improving the heat dissipation of the oil channels, which is more conducive to rapid heat dissipation of the winding and reducing losses.

Device (12) for inductive energy transfer between a traction battery (10) and an electric motor (8) of a semi-trailer truck (2) with a tractor unit (4) and with a semi-trailer (6), wherein the tractor unit (4) has the traction battery (10) or the electric motor (8), comprising - a kingpin (14) formed by means of a ferromagnetic first core (22) which is provided with a first transformer winding (24), and - a fifth wheel coupling (18) with a seat (20) for the kingpin (14), wherein the fifth wheel coupling (18) has a ferromagnetic second core (30) with a second transformer winding (32), - wherein the ferromagnetic first core (22) is I-shaped and the ferromagnetic second core (30) is U-shaped, - wherein its U-shaped legs (34) face the seat (20) of the fifth wheel coupling (18), so that when the kingpin (14) is received in the seat (20) a transformer core is formed by means of the ferromagnetic first core (22) and by means of the ferromagnetic second core (30), and - wherein the second core (30) is curved inwards on its U-shaped legs (34) at the free end.

This invention relates to the field of power electronic transformer winding technology, and more particularly to a strip-shaped Litz wire for solid-state transformers and its preparation method. The strip-shaped conductive core is composed of multiple enameled copper single wires; and a composite insulating coating covers the outer surface of the strip-shaped conductive core. The composite insulating coating comprises a polyimide matrix and chopped silica fibers dispersed in the polyimide matrix, with zinc oxide quantum dots anchored on the surface of the chopped silica fibers. The advantages of this invention are that by anchoring zinc oxide quantum dots to the surface of the chopped silica fibers and dispersing them in the polyimide matrix, the quantum dots are uniformly dispersed, forming a nonlinear conductivity network, suppressing partial discharge initiation, and improving corona resistance lifetime. The chopped silica fibers form a rigid skeleton in the coating, improving mechanical strength. The chemical bonding between the quantum dots and the fiber surface enhances interfacial bonding, further improving mechanical properties. Simultaneously, this structure avoids insulation defects introduced by nanoparticle aggregation, maintaining a high breakdown field strength and partial discharge initiation voltage.

The application discloses a kind of process methods of controlling transformer winding deformation amount, it is related to transformer manufacturing technical field, comprising the following steps: S1 the axial force distribution under multiple working conditions is calculated and weighted superposition is obtained comprehensive axial force field function, according to this, pre-tightening force demand distribution function is constructed, according to the distribution characteristics of pre-tightening force demand distribution function, winding is divided into several pre-tightening subareas along the axial direction;S2 according to each pre-tightening subarea, the gasket of different compression stiffness is configured, and in pre-tightening force attenuation sensitive area, the self-awareness compensation gasket with insulating packaging layer is configured;S3 sequentially carries out cyclic pre-compression processing, step loading stress redistribution, thermal coupling solidification and deadweight compensation differentiation pre-tightening processing;S4 actual pre-tightening force distribution is measured by embedded sensor, deviation with target value is evaluated and adjusted;S5 is completed fastening using subarea independent fastening system.

The utility model provides a kind of three-dimensional core automatic assembling device of winding iron, belong to transformer winding iron assembling technical field, including base, assembling rotary mechanism, assembling mechanism and incoming material mechanism, assembling mechanism slides along the radial direction of assembling rotary mechanism, assembling rotary mechanism drives assembling mechanism to rotate, and assembling mechanism is provided with the tensioning mechanism of longitudinal expansion and contraction.The utility model has rotation function, small equipment floor area, more flexible action, multiple assembling mechanisms can be connected with one or more incoming material mechanisms, to realize assembly line operation.

The application discloses a hoisting tool for transformer winding assembly, which comprises a joist, a lifting ring is arranged on the upper surface of the joist, the joist is connected with two supporting arms through two distance adjusting groups, and adjusting side stop groups are arranged on the two sides of the supporting arms; the adjusting side stop group comprises a side stop plate, a mounting seat, a moving plate, a connecting rod plate, a supporting plate, a screw rod and a hand wheel, the mounting seat is arranged on the two sides of the supporting arm, the side stop plate is hingedly connected on one side of the mounting seat, the supporting plate is arranged on the outer side of the side stop plate, the screw rod is rotatably connected on one side of the supporting arm, the moving plate is threadedly connected on the outer side of the screw rod, the other end of the screw rod is provided with the hand wheel, the connecting rod plate is rotatably connected on the two sides of the moving plate, and the connecting rod plate is hingedly connected with the supporting plate; through the arrangement of the two supporting arms, the winding on the two sides can be lifted, through the arrangement of the adjusting side stop group, the winding can be limited, the winding can be prevented from falling off from the supporting arm, the safety is high, through the arrangement of the distance adjusting group, the winding with different sizes can be hoisted, and the applicability is high.

The utility model relates to transformer winding machine technical field, specifically disclose a kind of transformer winding machine with clamping mechanism, including first take-up wheel, guide rail plate, transformer fixture, car body frame, guide clamping plate, first chuck, second chuck and second take-up wheel, the top middle part of guide rail plate is connected with transformer fixture by guide clamping plate, and transformer fixture is used to clamp the transformer core, the bottom of guide rail plate is connected with car body frame by connecting sleeve, the top both sides of guide rail plate are each equipped with baffle, first take-up wheel and second take-up wheel are equipped on the baffle by bearing seat. The middle part of guide rail plate is equipped with guide slot, the middle part of guide slot is equipped with screw rod, and screw rod can be with the guide ear wire rod transmission control of bottom, so that it can control lateral movement to transformer fixture, winding iron core is clamped and fixed by transformer fixture easily, and it can be moved to adjust lateral position, so that it is convenient to adjust winding position.

A transformer winding winding processing device, comprising a winding shaft and a winding die, the bottom of the winding shaft is provided with a fastening roller group, the fastening roller group comprises a hammering roller rolling in close contact with the winding material outside the winding die, the inside of the hammering roller is provided with a movable part reciprocatingly knocking the close contact point, the movable part is configured to knock the hammering roller at a set frequency, so that the winding material on the inner and outer sides of the rear side of the bonding area is uniformly in close contact. The present application sets up the fastening roller group, including the hammering roller, which knocks the winding material in the winding process at a high frequency, so that the inner and outer layers of the material are uniformly in close contact, effectively avoiding the problems of interlayer gap and wrinkles, thereby improving the quality of the winding. At the same time, the damping roller and the pressing roller can further eliminate material wrinkles and looseness, ensure the flatness and tightness of the winding material during the winding process, and the adjustable winding die facilitates the removal of the formed winding, thereby improving the production efficiency.

This application discloses a high-efficiency heat dissipation device for intelligent large transformers, belonging to the field of transformer heat dissipation. The high-efficiency heat dissipation device for intelligent large transformers includes a transformer housing, with heat dissipation fins assembled on the front and rear sides of the housing. Multiple windings are arranged inside the housing. An annular water pipe is provided on the outer wall of each winding, and a cold water tank is fixedly fitted around the annular water pipe. The cold water tank and the annular water pipe are connected through water holes. Fixed fins are assembled on the outer wall of each winding. This application uses a bimetallic strip to sense temperature changes in the transformer windings, and then utilizes the mechanical transmission of inclined slots and spiral slots to achieve adaptive expansion and contraction of the movable fins according to temperature changes. The higher the temperature, the larger the extended area of ​​the fins and the stronger the heat dissipation capacity. At low temperatures, the fins automatically retract, ensuring rapid cooling under overload and overheating conditions while avoiding redundant heat dissipation under normal conditions.

The application discloses a kind of based on multivariate information fusion and transformer winding fault monitoring method and system of deep learning, method includes: obtaining original vibration signal in the process of transformer operation, input to the transformer fault diagnosis model constructed in advance, output transformer winding fault type;The process for being constructed in advance by transformer fault diagnosis model is: obtaining original vibration signal in the process of transformer operation, constructs initial signal data set and is divided into multiple data samples;Composite feature vector of fusion time domain, frequency domain and time-frequency domain features is extracted from data sample;Convolutional neural network is constructed, and channel attention mechanism and spatial attention mechanism are introduced in convolutional neural network, and the deep learning model of fusion attention mechanism is constructed;Composite feature vector is used to train and evaluate deep learning model, and the final transformer winding fault diagnosis model is obtained.The application has the advantages of high fault diagnosis precision.

The application relates to a parameterized modeling method, device and computer equipment for a twisted transformer winding. The method comprises the following steps: obtaining initialization parameters of a pie-shaped winding; sequentially connecting main lines in a main line number-main line sleeve number mode; determining and correcting the motion trajectory of a wire turn in a wire pie based on a coordinate self-defined rule; based on the cross section of a wire, the motion trajectory of the wire turn is swept to obtain a three-dimensional wire turn entity; based on the number of backstepping generated when the motion trajectory is corrected, the start and end radian of the wire turn wound by the wire pie is corrected; the longitudinal coordinate of the wire turn wound by the wire pie is corrected; the outgoing head connection of the main line between the positive pie and the negative pie is performed, based on the cross section of the connecting wire, the motion trajectory of the connecting wire is swept, the sweeping result is integrated with the three-dimensional wire turn entity, and a double-wire pie three-dimensional entity is obtained. The method can efficiently and accurately complete the parameterized modeling of the twisted transformer winding.

This invention provides a transformer winding clamping processing equipment, belonging to the field of transformer manufacturing technology. It includes a workbench equipped with a clamping mechanism and a driving device. The clamping mechanism clamps the core column, and the output end of the driving device is connected to one end of the clamping mechanism to drive its rotation. A wire feeding device is provided on one side of the workbench for unwinding the coiled conductor. Through the clamping mechanism, a momentarily increased radial pressure is applied to the conductor when the core column connection is close to the clamping wheel. When the rotating device on the flat part of the core column is closest to the clamping wheel, the clamping wheel remains stationary or moves away from the core column, applying a constant clamping force to the conductor. This achieves automatic adjustment of the radial clamping force according to different parts of the core column, effectively avoiding the formation of triangular gaps at abrupt changes in the winding radius at the connection point, ensuring that the conductor is always tightly and uniformly wound on the core column, and significantly improving the winding processing quality.

A fixing device for a transformer winding thermometer is disclosed. This utility model relates to the field of transformer technology. A mounting base is fixedly installed on the lower side wall of a base. Mounting positions are provided on both the front and rear side walls of the base. Two connecting seats are respectively located within the mounting positions on the front and rear sides. The connecting seats are screwed to the base via a rotating shaft. A spline sleeve is screwed onto the connecting seat via a bearing. A side support shaft is movably inserted into the spline sleeve, and the side support shaft and spline sleeve are slidably connected via a spline engagement. Two positioning sleeves are symmetrically arranged on the front and rear sides of the mounting base, and the positioning sleeves are fixedly installed on the base. The positioning sleeves are engaged with the side support shaft. This device addresses the need to install the thermometer on the top cover of a transformer housing, providing an openable and locking support structure. This allows the structure to be fixed inside the transformer housing even without a suitable mounting position, thus enabling the installation of the thermometer.

The application discloses a pouring method of a high-thermal-conductivity epoxy dry-type transformer winding coil, and specifically comprises the following steps: performing vacuum degassing treatment on a high-thermal-conductivity resin A component mainly composed of epoxy resin and a high-thermal-conductivity resin B component mainly composed of an anhydride curing agent, preheating and then cooling the winding coil after being fixed in a mold; mixing the high-thermal-conductivity resins in proportion and pouring the winding coil; moving the poured winding coil into a drying box, applying an alternating voltage between the winding coil and the mold in stages, inducing orientation of hexagonal boron nitride in an epoxy encapsulating material, and making the orientation of the hexagonal boron nitride consistent with the thermal conduction direction of the winding coil; performing ladder curing on the winding coil according to a curing curve; cooling and demolding the winding coil in a drying furnace; and cooling the demolded winding coil to room temperature again, so that the winding coil is prepared. Through voltage-induced orientation, the thermal conductivity coefficient of the heat transfer direction of the transformer is improved, and the heat dissipation capacity of the dry-type transformer is improved.

This invention provides a method and system for testing high-frequency transformer winding coils, relating to the field of high-frequency transformer technology. The method includes the following steps: generating a standard calibration signal matching the target test frequency range, connecting it to an unloaded test link, a short-circuit test link, and a standard impedance load link respectively; collecting noise signal characteristics of each link; and establishing a noise database and calibration coefficient table. Through sensing units deployed around the winding coil, the method non-contactly collects electromagnetic field change data during coil operation in real time. This invention addresses interference problems caused by cable parasitic inductance, environmental electromagnetic noise, and instrument noise in high-frequency scenarios through pre-calibration and adaptive anti-interference compensation mechanisms. By establishing a noise database, it achieves accurate noise matching. Combined with adaptive filtering algorithms and dynamic adjustment of the excitation signal, it significantly improves the testing accuracy of sensitive parameters such as leakage inductance and distributed capacitance, ensuring test reliability.

The application belongs to the technical field of transformer detection, and provides a winding insulation fault detection method and system based on a low-noise dry-type transformer, which comprises the following steps: determining an electric field uniform disconnection period through an electric field distortion coefficient, pre-correcting a partial discharge amount, calculating a partial discharge correction amount, judging whether the partial discharge correction amount is within an error range, evaluating the necessity of correction, determining an electric field distortion period, correcting the partial discharge amount in the electric field distortion period, and judging and evaluating insulation faults after correction; comparing an insulation fault time point with the electric field distortion period, comparing insulation fault judgment results before and after partial discharge correction, judging insulation detection misjudgment risks caused by non-partial discharge correction, constructing a dynamically updated correction parameter library, correcting the discharge amount during subsequent detection, and improving the detection efficiency of subsequent winding insulation faults.

This invention provides a constant tension wire supply device for transformer windings and transformer winding production equipment. The constant tension wire supply device includes a wire supply mechanism and a constant tension buffer mechanism. The wire from the wire supply mechanism is wound after passing through the constant tension buffer mechanism, which maintains a constant tension in the wire. The constant tension buffer mechanism maintains a constant tension in the wire. Its movable sliding roller and slide block allow the roller to move accordingly during winding to maintain tension to a certain extent, preventing the roller from being affected by other forces. Simultaneously, a first drive motor moves the roller, and the constant torque of the first drive motor ensures constant tension during roller adjustment. A control mechanism acquires the displacement parameters of the roller and controls the rotational speed of the motor components of the wire supply mechanism, further maintaining constant tension.

Disclosed in the embodiments of the present invention is a short-circuit fault detection method for transformer windings. The method comprises: acquiring magnetic flux leakage data between transformer windings; on the basis of the magnetic flux leakage data, determining a short-circuit faulty region; constructing a transformer finite-element model; on the basis of the short-circuit faulty region, performing simulation on the transformer finite-element model, so as to acquire a short-circuit database; and collecting in real time the magnetic flux leakage data between the transformer windings, and on the basis of the short-circuit database, determining a short-circuit faulty position of the transformer windings. By means of acquiring magnetic flux leakage data, determining a short-circuit faulty region, constructing a finite element model, performing simulation to acquire a short-circuit database, and positioning a fault in real time, the present invention realizes the accurate detection of short-circuit faults of transformer windings. The method not only improves the accuracy and efficiency of fault detection, but also provides a strong guarantee for the safe operation of transformers.

The application discloses a power electronic distribution network transformer propagation model optimal adaptation method and system, and the method comprises the following steps: calculating transformer winding leakage inductance and winding resistance, and transformer excitation inductance and excitation resistance; estimating the equivalent value of each link distributed capacitance; deducing the propagation coefficient of the high-frequency transformer model and the low-frequency transformer model at any frequency under the excitation source; calculating the relative deviation amount of the corresponding propagation coefficient of the high-frequency transformer model and the low-frequency transformer model at different frequencies in the required frequency band of the simulation scene; obtaining the maximum value of the relative deviation amount of the propagation coefficient under all conditions in the required frequency band of the simulation scene; when all the maximum values of the relative deviation amount of the propagation coefficient are less than the set relative deviation limit value, the low-frequency transformer model is selected for the simulation scene, otherwise the high-frequency transformer model is selected; the application has the advantages that the optimal selection of the transformer model is performed under the consideration of the simulation efficiency and accuracy requirements.