126 results about "Traction transformer" patented technology

The invention relates to the technical field of power monitoring, in particular to an urban rail power supply system fault early warning method based on multi-source data fusion, which comprises the following steps: acquiring a thermogram, extracting a temperature drift trajectory, marking a thermal abnormal point, identifying abnormal data by combining voltage sampling, analyzing the overlapping property of abnormal time and direction, and positioning a fault overlapping point. And identifying the linkage early warning area through spatial statistics. According to the method, the continuous drift trajectory of the temperature gravity center in the traction transformer thermogram is recognized, the thermal abnormal points are extracted, the voltage sudden change features are analyzed in combination with the voltage sampling sequences in the same time period, the composite recognition mode of time synchronization and trend direction comparison is achieved, the fault symptom positioning accuracy is effectively improved, and the fault symptom positioning accuracy is improved. By aggregating the fault coincidence points in the plurality of power supply sections and executing the spatio-temporal clustering operation, the capability of sensing common anomalies in the region can be significantly improved, and a potential linkage fault region can be clearly identified based on joint calculation of a spatial adjacent structure and a statistical aggregation degree.

The invention provides a railway flexible traction system based on multi-source fusion. The system is composed of a central control unit, a V / v traction transformer unit and a multi-port flexible interconnection unit. The V / v traction transformer unit comprises a first power supply arm, a second power supply arm and a third power supply arm, the input ends of the V / v traction transformer unit are connected with a public power grid, the first and second power supply arms are connected to the multi-port flexible interconnection unit, and the third power supply arm provides passive support for a traction network. The multi-port flexible interconnection unit comprises a two-phase rectification module, a photovoltaic power generation module, an energy storage module and a single-phase inversion module which are commonly connected to a DC bus. The central control unit adjusts the output power of the multi-port flexible interconnection system and the control strategy of the single-phase inversion module in real time so as to realize flexible consumption of new energy and improvement of power supply stability. The system has the advantages of compatibility, cost effectiveness, new energy access and consumption, power supply reliability improvement, electric energy quality optimization, high adaptability and the like, and is suitable for upgrading and reconstruction of newly-built railway lines and existing railway lines.

The invention discloses a simulation method of a full-system coupled railway traction power supply system, which comprises the following steps: taking a traction power supply system and a train group as integrated simulation objects, and respectively constructing traction power supply network models including equivalent models of traction transformer, traction network, AT station and public power grid parameters; a multi-train operation simulator is constructed, and the multi-train operation simulator comprises various parameters such as trains, lines, signal systems, operation organizations and the like. Traversing all on-line trains through a multi-train operation simulator, substituting the on-line trains into a traction power supply network model, and dynamically calculating operation parameters and traction loads of a train group, including calculating locomotive initial current according to train initialization voltage, solving a traction power supply network node voltage equation and updating locomotive terminal voltage; and correcting the traction and braking characteristics of the train based on the updated locomotive terminal voltage. The method overcomes the defects of a traditional calculation method using a traction power supply system as an isolated network, reveals the dynamic state of train operation and the distribution characteristics of the traction network, and finally can obtain various parameters of each train.

The invention discloses a method for calculating equivalent circuit parameters of a double-current-system multi-winding traction transformer, which comprises the following steps of: constructing a full-size equal-scale model of the double-current-system multi-winding traction transformer, and establishing a finite element calculation model; according to the finite element calculation model, inductance matrixes formed among the I-type winding, the II-type winding and the III-type winding under the two power supply modes of 25kV / 50Hz and 15kV / 16.7 Hz are calculated respectively; based on the formed inductance matrix, establishing a transformer multi-winding equivalent model, and considering circulating current influence caused by internal parallel connection of the I-type winding to obtain actual current sequences of the windings under short-circuit tests between the I-type winding and the III-type winding, between the I-type winding and the II-type winding and between the II-type winding and the III-type winding; according to the obtained actual current sequence of each winding, the short-circuit impedance between the I-type winding and the III-type winding, the short-circuit impedance between the I-type winding and the II-type winding and the short-circuit impedance between the II-type winding and the III-type winding are calculated through an energy method; and obtaining equivalent circuit parameters of the transformer according to the obtained short-circuit impedance value.

The invention discloses a power grid power compensation method, which is applied to a controller, and the controller is connected with a power compensation system. The power compensation system comprises a traction transformer and a converter. The converter is connected with the traction transformer through a first power supply arm and a second power supply arm of the traction transformer; the method comprises the following steps: acquiring a first power parameter of a first power supply arm, and acquiring a second power parameter of a second power supply arm; determining a power compensation parameter for performing power compensation on the first power supply arm and the second power supply arm under the condition of determining that a power adjustment condition is met based on the first electric power parameter and the second electric power parameter; the first power supply arm and the second power supply arm are subjected to power compensation based on the power compensation parameter and the converter, namely, the power difference between the two power supply arms (the first power supply arm and the second power supply arm) is adjusted through the calculated power compensation constant and the converter, so that the influence of unbalanced negative sequence voltage is reduced, and the power supply stability is improved.

The application discloses a traction transformer control cabinet and a rail train, and relates to the technical field of rail transit vehicles.The traction transformer control cabinet comprises a detachable shell and a control module arranged in the detachable shell; wherein the control module is used for determining the fan frequency of the fan in the cooling system of the traction transformer according to the first collection data sent by the whole vehicle controller of the rail train and the second collection data sent by the traction transformer, so as to utilize the fan frequency to perform frequency conversion control on the fan; the first collection signal comprises vehicle speed data, and the second collection signal comprises oil temperature data; through the arrangement of the traction transformer control cabinet, the control module in the traction transformer control cabinet performs frequency conversion control on the cooling fan according to the data such as the vehicle speed of the train and the oil temperature of the traction transformer, the low noise and the intelligentization of the traction transformer are realized, the noise of the rail train can be effectively reduced, and the passenger comfort is improved.

The invention relates to a heavy haul railway traction transformer state monitoring method, device and equipment. The method comprises the following steps: acquiring a real-time sound signal of a traction transformer of the heavy haul railway; performing time-frequency feature extraction on the real-time sound signal to obtain a Mel time-frequency spectrogram; inputting the Mel-time spectrogram into a pre-trained voiceprint feature extraction model to obtain to-be-detected feature embedding; the voiceprint feature extraction model is a neural network model obtained by training based on an audio data set; according to the distance between the to-be-detected feature embedding and the pre-stored feature embedding in the voiceprint feature memory library, obtaining an operation state monitoring result of the traction transformer; the pre-stored feature embedding is obtained by extracting a sound signal based on the traction transformer in a normal operation state. By adopting the method, the state monitoring accuracy of the heavy haul railway traction transformer can be improved.

The invention discloses a method for establishing a small-signal mathematical model of a train network system during dynamic change of train operation, which comprises the following steps of: firstly, dividing the system into four sub-modules, namely a train, a traction network, a traction transformer and a power grid, and dividing an uplink traction network and a downlink traction network into n + 2 sections according to the maximum number n of trains operating on a power supply arm, the traction network is formed by cascading the impedance of each section of equivalent line of uplink and downlink, then establishing a small-signal mathematical model of each sub-module, and then forming a system small-signal mathematical model when the number of trains capable of running on a power supply arm is maximum through a relational expression between the voltage of each node and the current of each branch of the network according to the actual topology of the system. When the train operation number changes, state variables related to the trains and coefficient matrix elements related to the state variables are deleted, and when the train operation position changes, the specific value of the impedance of each section of the traction network is changed, so that dynamic modeling of the train network coupling system can be realized. According to the invention, the stability of the vehicle network system can be evaluated online.

The invention discloses an energy storage cophase power supply system based on a V-connection traction transformer, a control method and a storage medium, and belongs to the technical field of electrified railway power supply. The energy storage in-phase power supply system comprises a V-connection traction transformer, three single-phase compensation devices, an energy storage device and a coordination control device. The primary side of the V-connection traction transformer is connected with a three-phase power supply, and any port of the secondary side is connected with a traction load; aC ends of the three single-phase compensation devices are respectively connected to different ports of the secondary side, and DC ends are connected in parallel to a DC bus; the energy storage device is also connected in parallel with the DC bus. The coordination control device collects current and voltage signals and controls operation of the devices. The system has the functions of energy storage and in-phase power supply, and solves the problems of large traction load fluctuation of a traditional electrified railway traction substation, power return caused by train regenerative braking, train over-electricity split-phase stall and electric energy quality management.

The present invention discloses a main wiring structure of a hub traction substation, which includes two external power supplies and two groups of traction transformers. It also includes a switching unit, several feedback lines, and two independently arranged busbars. One group of busbars is powered by one power supply, and the other group of busbars is powered by the other power supply. Each group of busbars is configured with the same number of feeder lines to form two independent power supply devices that are physically isolated and electrically separated from each other; the feeder lines all pass through the switching unit (7) and the corresponding switches (8); switches (8) are provided on all the feeder lines to achieve switching between the two groups of power supply devices through the switching of the switches. The main wiring structure of the hub traction substation of the present invention sets two mutually independent power supply devices. Due to the achievement of physical isolation and electrical separation, when one group of devices fails or is struck by lightning, the other group of devices can be unaffected and quickly put into operation, thus restoring normal power supply and improving power supply reliability.

The invention discloses a locomotive electrical system and a locomotive power supply control method, and the locomotive electrical system is characterized in that the high-voltage input end of a traction transformer is electrically connected with a locomotive contact net through the rising of a pantograph, or is electrically disconnected with the locomotive contact net through the falling of the pantograph; the input end of the four-quadrant rectifier module is connected with the low-voltage output end of the traction transformer; the auxiliary load module, the power battery module and the traction module are respectively connected with the output end of the at least one four-quadrant rectification module; the power battery module is used for storing energy and supplying power to the locomotive; the traction module is used for traction locomotive driving and / or kinetic energy recovery. The invention provides a locomotive electrical system. An auxiliary load module, a power battery module and a traction module are connected to the output end of a four-quadrant rectification module. The auxiliary load module, the power battery module and the traction module operate independently so that a charging strategy can be controlled conveniently, and charging of a power battery of a locomotive electrical system can be achieved when a locomotive operates.

The invention discloses a method for evaluating the circumferential heat dissipation uniformity of a dry-type traction transformer winding. Comprising the following steps: establishing a dry-type traction transformer winding circumferential heat dissipation uniformity degree test platform, obtaining air duct inlet air speed and air duct outlet temperature data at a low air speed, obtaining air duct inlet air speed and air duct outlet temperature data at a high air speed, calculating a circumferential heat dissipation uniformity coefficient at the low air speed, and calculating the circumferential heat dissipation uniformity degree of the dry-type traction transformer winding. And calculating a circumferential heat dissipation uniformity coefficient at a high wind speed, calculating a winding circumferential heat dissipation uniformity degree evaluation coefficient, and evaluating the circumferential heat dissipation uniformity degree of the dry traction transformer winding. The method has the beneficial effects that the heat dissipation capability and the temperature distribution difference of the dry-type traction transformer winding in the circumferential direction are effectively evaluated, and a new method is provided for rationality judgment of a design scheme of a cylindrical winding cooled by train running air; therefore, technical support is provided for optimization design of a winding heat dissipation structure, improvement of cooling performance and improvement of the space structure utilization rate.

The train control system comprises a traction transformer located outside a train and a traction converter located inside the train, the traction converter comprises a first contactor and a power module, the traction transformer is connected with one end of a first connecting piece through a cable, the other end of the first connecting piece is connected with an input end of the first contactor, the first contactor is connected with the bottom of the traction converter through a movable mounting plate, an output end of the first contactor is connected with one end of a second connecting piece, and the other end of the second connecting piece is connected with the power module. The technical scheme of the embodiment of the application effectively promotes the reasonable layout of the overall structure of the traction converter, flexibly adapts to the change of customer demand, and quickly responds to the market customer demand.

The application provides a transformer hoisting traction device, which comprises a main box, a climbing assembly installed on the side of the main box, the climbing assembly clamped on the left and right sides of an electric pole, the climbing assembly used to drive the main box to lift to complete automatic hoisting of the transformer and automatic separation of the main box, a lower clamping assembly, a reserved bracket clamped and installed on the outer wall of the electric pole, the reserved bracket arranged above the main box, a suspension assembly comprising a first lifting frame, a second lifting frame, a wire wheel and an end plate, a lifting assembly, an outer clamping assembly, a rotating assembly and an outer blocking assembly. The application can automatically drive the reserved bracket and the transformer body to lift, complete butt joint of the transformer body and the reserved bracket, and does not need manual high-altitude traction, so that the transformer laying safety is higher, and the operation stability and efficiency are also higher.

The present invention provides an electromagnetic interference prediction modeling, prediction method and system, including: establishing a key cable harness model; establishing a grounding system model of a traction transformer and a traction motor; establishing an equivalent model of a traction motor based on the fact that when the frequency is high, the internal structure of the traction transformer and the traction motor will form a common mode path due to parasitic capacitance, and the conductor carrying a high-frequency common mode current will generate undesirable electromagnetic radiation; establishing a three-dimensional model of a car body, a rail and an axle counter magnetic head; connecting the above models according to the relationship between the corresponding entities of the model, and establishing an overall radiation model of the interference of the traction converter system to the axle counter. The model can more accurately describe the impact of the EMC interference generated by the traction power supply system of an intercity train on the axle counter.

This invention relates to a long-distance power supply system and method for a coal mining machine. The system includes a mobile substation, a remote switch control device, a main cable, and a coal mining machine connected in sequence. The remote switch control device includes a frequency converter and first to fourth switches. The coal mining machine includes left and right cutting motors and a third contactor, a traction transformer, a control transformer, a UPS power supply, and a coal mining machine control system connected in sequence. The left and right cutting motors are respectively connected to the upstream line of the third contactor via the first and second contactors. The method includes first turning on the UPS power supply to power on the coal mining machine control system, pressing the start buttons of the left and right cutting motors to engage the first and second contactors, pressing the main start button to close the first, second, and third remote switches in sequence, soft-starting the left and right cutting motors, closing the fourth switch, opening the third switch, and closing the third contactor. This invention enables long-distance power supply to the coal mining machine while ensuring the normal start-up of the cutting motors.

The invention provides a self-traction hoisting type oil-immersed transformer. The self-traction hoisting type oil-immersed transformer comprises a mainframe box, the climbing assembly is installed on the side portion of the mainframe box, the climbing assembly clamps the left side and the right side of the electric pole, and the climbing assembly is used for driving the mainframe box to ascend and descend so as to complete automatic hoisting of the transformer and automatic separation of the mainframe box; a lower clamping assembly; the reserved bracket is clamped and mounted on the outer wall of the electric pole, and the reserved bracket is arranged above the mainframe box; the hanging assembly comprises a first hanging bracket, a second hanging bracket, a wire guide wheel and an end plate; a hoisting assembly; an outer clamp assembly; a rotating assembly; an outer blocking assembly; according to the device, the reserved bracket and the transformer body can be automatically driven to be lifted, butt joint of the transformer body and the reserved bracket is completed, manual high-altitude traction is not needed, the transformer laying safety is higher, and the operation stability and efficiency are higher.

The invention discloses a method for calculating a winding temperature influence coefficient of a lightweight traction transformer bushing. Comprising the following steps: establishing a lightweight traction transformer winding body and sleeve thermal test platform under an air cooling working condition, carrying out a steady thermal test under a typical traction working condition of a motor train unit, collecting temperature data, and calculating a winding temperature influence coefficient of a sleeve based on the obtained temperature data, and evaluating the negative influence degree of the bushing on the winding temperature of the lightweight traction transformer. The beneficial effects of the invention are that a test method, an evaluation coefficient and an evaluation method which consider the influence of the sleeve on the lightweight traction transformer winding are proposed for the first time, and the axial temperature change trend of the winding and the circumferential temperature distribution rule of the winding at the section where the sleeve is located are fused; objective and accurate evaluation of the negative influence degree of the prototype sleeve on the winding temperature under specific design can be realized, and a new technical means is provided for efficient design and structural optimization of the lightweight traction transformer.

The utility model discloses a traction transformer differential protection device, which relates to the technical field of electrified railway transformer protection and comprises a first trigger circuit for triggering a first magnetizing inrush current blocking signal, a second trigger circuit for triggering a second magnetizing inrush current blocking signal and a third trigger circuit for triggering an empty charging state signal of a transformer. The fourth trigger circuit triggers a differential current waveform asymmetrical signal, the AND logic device I performs AND logic processing on a second magnetizing inrush current blocking signal, a transformer empty charging state signal and the differential current waveform asymmetrical signal, and the OR logic device I performs OR logic processing on an output result of the AND logic device I and a first magnetizing inrush current blocking signal. And triggering an excitation inrush current blocking signal according to an output result of the OR logic device 1. By adding a criterion of magnetizing inrush current locking, protection maloperation caused by magnetizing inrush current in the air-drop process of the traction transformer can be effectively avoided.

The present application discloses an electrified railway traction power supply system and method based on a multi-source access structure. The system includes a power supply unit, an energy storage unit, and a traction network unit. The power supply unit includes at least two of a decentralized wind turbine group, a distributed photovoltaic group, a fuel cell group, a diesel engine / small hydropower group, a distribution network, and a high-voltage power grid. The energy storage unit includes an energy storage device, an energy storage converter, and a split-type traction transformer. The electrified railway traction power supply system and method of the present invention get rid of the excessive dependence on the high-voltage power grid, can flexibly form an energy supply system according to the natural endowments such as wind, light, and water at the electrified railway construction site and other convenient power sources, and utilize the energy migration technical characteristics of the energy storage unit of "full-time convergence and on-demand release" to realize the safe, reliable, and continuous power supply of the traction power supply network under a weak grid or even without a grid. At the same time, many adverse problems of the existing electrified railway traction power supply system are solved.

The invention discloses a railway vehicle waste heat recovery heat management method and a railway vehicle waste heat recovery system, the railway vehicle waste heat recovery system comprises a traction transformer, a phase change heat exchanger and a passenger room system, and a proportioning valve and a fluid pump are connected between the traction transformer and the phase change heat exchanger; a high-temperature cooling medium of the traction transformer flows back to the traction transformer after entering the phase-change heat exchanger through the proportioning valve and the fluid pump, and a phase-change working medium of the phase-change heat exchanger absorbs heat of the high-temperature cooling medium, becomes a gaseous working medium and then enters the passenger compartment carriage. The gaseous working medium is changed into a liquid working medium to flow back to the phase change heat exchanger after exchanging heat with air-conditioning fresh air in the passenger compartment, the waste heat potential is predicted according to the temperature of the high-temperature cooling medium at the outlet of the traction transformer and the temperature of the passenger compartment, and dynamic logic control is conducted on the proportioning valve based on a differential equation; and adjusting the temperature of the passenger compartment to a steady state. According to the heat management method for waste heat recovery of the railway vehicle and the waste heat recovery system of the railway vehicle, the optimal working condition point is accurately judged through intelligent logic control, the carriage is kept at the comfortable temperature, and therefore the purpose of saving energy is achieved.

The invention discloses a double-source locomotive ramp anti-slip system and a control method. The ramp anti-slip system for the double-source locomotive comprises a traction transformer, a first traction converter, a second traction converter, a first traction motor, a second traction motor, a third traction motor, a fourth traction motor, a first speed sensor, a second speed sensor, a third speed sensor, a fourth speed sensor and a controller, the controller is used for judging whether the first traction motor, the second traction motor, the third traction motor and the fourth traction motor are reverse or not according to the rotating direction and the rotating speed to determine whether the double-source locomotive slides or not and the sliding speed; the controller is used for conducting traction and braking control on the first traction motor, the second traction motor, the third traction motor and the fourth traction motor through the first traction converter and the second traction converter respectively when the double-source locomotive slides. According to the anti-slip device, a driver does not need to participate, and even if slipping occurs, the slipping force of the double-source locomotive can be counteracted, so that anti-slip is realized.

The invention belongs to the field of train control, and relates to a protection system for grounding backflow failure in traction transformer electric leakage detection, which comprises a pantograph, a vacuum circuit breaker, a traction transformer and a wheel set assembly, the network current transformer is connected with the pantograph and the vacuum circuit breaker; the first current transformer is connected with the vacuum circuit breaker and the first end of the traction transformer; the second current transformer is connected with the second end of the traction transformer and the wheel set assembly; a grounding backflow cable is arranged between the second end of the traction transformer and the wheel set assembly, during normal work, current of the second end of the traction transformer can reach the wheel set assembly through the grounding backflow cable, and normal grounding backflow is achieved. An electric spark discharger is further arranged between the second end of the traction transformer and the wheel set assembly, and the electric spark discharger is connected with the second current transformer in parallel.

The utility model discloses a traction transformer radiating device which comprises an oil tank and a heat exchanger, the heat exchanger comprises a heat exchange tube, radiating fins and a radiating fan, and the heat exchange tube is communicated with the oil tank through an oil pump; the cooling fins are arranged on the outer side of the coiled pipe at intervals, the cooling fins are parallel to the advancing direction of the train, and the cooling fan is arranged on one side of the cooling fins; a plurality of heat pipes are arranged between the cooling fins in a penetrating mode, evaporation sections of the heat pipes are located between the cooling fins, and condensation sections of the heat pipes extend outwards and exceed the edge of the oil tank. The heat pipes extending out of the edge of the oil tank are inserted into the cooling fins of the radiator in a penetrating mode, when a train travels, heat of the cooling fins is transferred to evaporation sections of the heat pipes through the heat pipes, and the heat pipes are cooled through traveling air; when the train stops, the cooling fan is used for directly dissipating heat of the cooling fins, noise generated when the cooling device operates is reduced, energy loss generated when the cooling fan operates is reduced, and the cooling effect of the traction transformer is guaranteed.

The application relates to the field of rail transit and electricity and discloses a traction transformer assembly, which comprises a support assembly, a traction transformer body, a cooler and a pipeline assembly; the support assembly comprises a pair of longitudinal beams and a pair of cross beams vertically connected between the pair of longitudinal beams; the traction transformer body is suspendedly connected between the pair of cross beams; the cooler is connected to one side of the traction transformer body; and the pipeline assembly is connected between the traction transformer body and the cooler and is used for driving the circulation of cooling oil in the traction transformer body and the cooler. The traction transformer assembly provided by the application is convenient to install and maintain, safe and reliable to operate and simple in arrangement.

The application discloses a port isolation type in-phase power supply system based on MMC and a control method thereof, which comprises a three-phase high-voltage DC bus at a power grid side, a traction Scott transformer for traction of an electric locomotive, a three-phase MMC-STATCOM reactive power compensation device, and a matching Scott transformer for connecting the traction Scott transformer and the three-phase MMC-STATCOM reactive power compensation device; the primary side of the traction Scott transformer is connected with the three-phase high-voltage DC bus, and the secondary side is connected with the corresponding secondary side of the matching Scott transformer; the primary side of the matching Scott transformer is connected with the three-phase MMC-STATCOM reactive power compensation device; the alpha phase and the beta phase of the secondary side of the traction Scott transformer are connected in series and connected to a traction bus to supply power to the electric locomotive. The system can not only realize three-end isolation of the power grid system, the traction system and the compensation system and ensure safety, but also form a three-phase symmetrical voltage with the same phase as the power grid voltage at the alternating current side of the three-phase MMC-STATCOM reactive power compensation device, and has a small capacity.

The present invention discloses a co-phase traction power supply system for electrified railways and a control method thereof. The co-phase traction power supply system includes a traction transformer, a compensating matching transformer, a co-phase compensation device, an energy storage device, and a measurement and control device. The primary side of the traction transformer is connected to the three-phase high-voltage bus, and any two terminals of its secondary side are connected to the traction load; the primary side of the compensating matching transformer is connected to the secondary side of the traction transformer; the AC end of the co-phase compensation device is connected to the secondary side of the compensating matching transformer; the energy storage device is connected to the DC end of the co-phase compensation device; and the measurement and control device is connected to the co-phase compensation device and the energy storage device, respectively. Therefore, the present invention can not only realize co-phase power supply for the entire railway line and eliminate electrical phase separation, but also effectively realize the technical and economic optimization of co-phase power supply for electrified railways, thereby solving the power quality problem caused by the load of electric locomotives on electrified railways, which is mainly caused by the negative sequence of the three-phase system.

1. Name of the design product: Frame of traction converter unit for railway vehicles. 2. Use of the design product: It is used to install the traction converter unit for railway vehicles, which is used to convert the electric power from the traction transformer in the traction conversion system of railway vehicles and output it to the traction motor. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view 1 of Design 1. 5. Design 1 is designated as the basic design. 6. Other situations that need to be explained - Explanation of change states: In the reference use state diagrams of Design 1 and Design 2, the symbol 1 represents the frame of the traction converter unit for railway vehicles, 2, 3, and 4 respectively represent the water - cooled plate, rectifier module, and inverter module installed in the frame 1 of the traction converter unit for railway vehicles, 5 represents the wiring terminal led out from the rectifier module 3 and inverter module 4 to the outside of the frame 1 of the traction converter unit for railway vehicles, and 6 represents the current sensor installed on the outer surface of the frame 1 of the traction converter unit for railway vehicles.

The utility model provides a traction transformer oil injection and exhaust system based on distributed oil injection and exhaust. The traction transformer oil injection and exhaust system comprises a traction transformer, an oil cooler, an oil pump, an oil inlet pipe and an oil return pipe. The traction transformer and the oil cooler are connected in series through an oil inlet pipe and an oil return pipe, and insulating oil in the traction transformer is pumped into the traction transformer from the oil cooler through an oil pump on the oil inlet pipe and then returns to the oil cooler through the oil return pipe for circulating cooling; a box cover quick connector is arranged on the upper portion of the traction transformer, oil is injected into the traction transformer through the box cover quick connector, a balance pipe is arranged on the box cover quick connector of the traction transformer and connected to an external oil conservator, and a detachable pressurizing air pump and a respirator are arranged on the oil conservator. An oil cooler exhaust port is formed in the top of the cooler, and a detachable oil cooler exhaust pipe is connected outside the oil cooler exhaust port; a traction transformer and an oil inlet pipe exhaust port are arranged at the top of the oil inlet pipe, and a detachable oil inlet pipe and a transformer exhaust pipe are connected to the traction transformer and the oil inlet pipe exhaust port.

The invention provides a traction device for hoisting a transformer. The traction device comprises a mainframe box, the climbing assembly is installed on the side portion of the mainframe box, the climbing assembly clamps the left side and the right side of the electric pole, and the climbing assembly is used for driving the mainframe box to ascend and descend so as to complete automatic hoisting of the transformer and automatic separation of the mainframe box; a lower clamping assembly; the reserved bracket is clamped and mounted on the outer wall of the electric pole, and the reserved bracket is arranged above the mainframe box; the hanging assembly comprises a first hanging bracket, a second hanging bracket, a wire guide wheel and an end plate; a hoisting assembly; an outer clamp assembly; a rotating assembly; an outer blocking assembly; according to the device, the reserved bracket and the transformer body can be automatically driven to be lifted, butt joint of the transformer body and the reserved bracket is completed, manual high-altitude traction is not needed, the transformer laying safety is higher, and the operation stability and efficiency are higher.