328 results about "Current transformer" patented technology

The invention belongs to a transformer structure, and provides a direct-current transformer, a power transmission system and a control method of the power transmission system in order to solve the technical problems that a three-level circuit topology in a power module in an existing direct-current transformer is large in number of power devices, complex in structure and large in layout and wiring difficulty. Each power module comprises a first-stage circuit, a second-stage circuit, two first direct-current bus capacitors and two second direct-current bus capacitors, the two first direct-current bus capacitors are connected in series to form a first capacitor circuit, and the two second direct-current bus capacitors are connected in series to form a second capacitor circuit. The first-stage circuit comprises two first half-bridge circuits which are connected in series, and the second-stage circuit is a dual-active bridge converter based on a series half-bridge. The number of power devices is remarkably reduced, meanwhile, the layout and wiring difficulty of the whole circuit is simplified, and popularization and application of the direct-current transformer are easier.

The invention relates to a distributed photovoltaic power station main converter and a control method thereof, and belongs to the field of photovoltaic power generation. The main current transformer comprises a T-type three-level current transformer and a Buck-Boost current transformer; the T-type three-level converter comprises three bridge arms, two output capacitors and the like; each bridge arm is provided with four power switch tubes; the two output capacitors are connected in series, and the connection point is called as the midpoint O of the T-type three-level converter. And one end of a direct-current inductor of the Buck-Boost converter is connected with the midpoint O. The T-type three-level converter adopts PI control and a carrier pulse width modulation strategy to realize alternating current side current harmonic wave minimization of the T-type three-level converter; the Buck-Boost converter adopts a PI control method to realize neutral-point potential automatic balance control. The method is small in current harmonic wave, low in cost and simple to control, and can realize quick and automatic balance of the neutral-point potential, thereby effectively coping with the influence of illumination and power grid voltage fluctuation on system control, and realizing quick and stable control of the distributed photovoltaic power station.

The invention discloses a bidirectional hybrid output direct-current transformer and a fault current limiting design method thereof, and the medium-voltage side and the high-voltage side of the bidirectional hybrid output direct-current transformer are respectively composed of three thyristor valve groups and three sub-module bridge arms, and are connected through a medium-frequency transformer. The thyristor valve group is formed by reversely connecting two groups of series thyristors in parallel, and the medium-voltage side sub-module bridge arm and the high-voltage side sub-module bridge arm are respectively composed of NM half-bridge sub-modules and NH half-bridge sub-modules. According to the invention, the sub-module bridge arms with strong control capability are combined with the thyristors and the diode valve groups which are low in cost, low in loss and high in power density, bidirectional power transmission and reliable turn-off of the thyristors can be realized through coordination and cooperation of the middle-voltage side bridge arms and the high-voltage side bridge arms, smooth direct current is ensured, and a filter does not need to be installed. When a short-circuit fault occurs in the outgoing submarine cable, a fault current active suppression strategy is provided, and the scheme can effectively reduce the peak value of the fault current and eliminate the current-limiting inductance.

A transformer substation main equipment fault diagnosis method is characterized in that the method comprises the following steps: collecting transformer substation main equipment multi-modal total data, and obtaining a transformer substation main equipment knowledge graph through word segmentation, entity extraction, relation extraction and knowledge representation processes; extracting a multi-source semaphore related to the current transformer substation main equipment from the multi-modal full-quantity data of the transformer substation main equipment, obtaining a frequent item set in the multi-source semaphore by adopting an association rule mining algorithm, and constructing sensing data information according to the frequent item set; and a graph attention network is utilized to encode the triple in the transformer substation main equipment knowledge graph, a multi-hop reasoning mode is adopted to identify perception data information, and a transformer substation main equipment fault diagnosis result is obtained according to an output result.

The invention discloses a direct-current transformer power self-balancing control system, which belongs to the technical field of direct-current self-energy taking under a direct-current power distribution network, and comprises a plurality of flyback converters, and a master-slave control framework is formed by taking the actually grounded flyback converter as a master module and taking other flyback converters as slave modules; the main module controls an MOS tube in the main module to be switched on or switched off according to the reference duty ratio; and the slave module controls on or off of an MOS tube in the slave module according to the reference duty ratio and the duty ratio correction. The master module adopts a system output voltage loop to maintain the stability of the system output voltage, the slave module input stage adopts an input grading ring to realize the sharing of the input voltage between flyback modules, and the slave module output stage adopts an output current sharing ring to improve the dynamic response effect of the system. The system can solve the problem of power distribution imbalance caused by inconsistent parameters between flyback modules.

The invention relates to the field of intelligent analysis, and discloses a transformer operation state analysis system and method for transformer substation noise, and the method comprises the steps: collecting the sound signal and noise intensity of a transformer in each region during operation at a set frequency; performing feature extraction on the sound signal of each area to obtain corresponding waterfall spectrogram feature information; inputting the waterfall spectrogram feature information into a pre-trained convolutional neural network model, and outputting a transformer operation state of each region; the transformer operation state of each area in the transformer operation state analysis module is compared with the noise intensity, if the transformer operation state is matched with the noise intensity, it is judged that the current transformer operation state is accurate, and if the transformer operation state is not matched with the noise intensity, it is judged that the current transformer operation state is not accurate, all operation parameters of the transformer are obtained and then analyzed, and transformer operation coefficients are obtained; and updating the current transformer operation state according to the transformer operation coefficient.

The invention relates to the technical field of converters, in particular to a three-phase converter control method and system, a medium and equipment. The method comprises the steps that a main processor transmits sampling original data of a three-phase converter to a first storage area; the coprocessor reads the sampled original data, performs operation to obtain operation result data, and transmits the operation result data to the second storage area; the coprocessor runs at a period higher than the preset control frequency of the main processor, and immediately triggers the operation of the sampled original data after completing the collection of the sampled original data; the main processor performs control loop calculation, reads the operation result data when the newest operation result data is needed, and loads the newest operation result data for updating operation; the main processor runs the control program at the preset control frequency, and the control program triggering time is set in a minimum allowable time window before the control output quantity loading moment. Through the above arrangement, real-time sampling is effectively realized, CPU load is optimized, and the control performance of the converter is improved.

The invention discloses a transformer fault detection method and device, a transformer and a storage medium. The transformer fault detection method comprises the following steps: acquiring hydrogen gas concentration, methane gas concentration, ethylene gas concentration, ethane gas concentration and acetylene gas concentration of dissolved gas in transformer oil, and determining a target transformer fault area corresponding to the dissolved gas according to the acetylene gas concentration; and determining a decision coordinate value corresponding to the dissolved gas according to the hydrogen gas concentration, the methane gas concentration, the ethylene gas concentration, the ethane gas concentration and the acetylene gas concentration, and determining a current transformer fault of the transformer according to the decision coordinate value and the target transformer fault area. According to the method, the dissolved gas in the transformer oil is effectively identified and quantified, the method is suitable for low-cost online fault detection of the transformer, and the accuracy of fault detection and identification of the transformer is improved.

The invention discloses an adaptive virtual impedance-based fault current limiting method for a network-forming converter, and belongs to the technical field of converter control. Comprising the following steps: collecting grid-side voltage, converter-side voltage and converter output current; carrying out current amplitude calculation on the grid-side voltage quantity to obtain a current effective value of the port of the converter; judging whether the current effective value of the current transformer port exceeds a current threshold value of the current transformer; and if yes, self-adaptive virtual impedance is introduced to carry out converter fault current limitation. The resistance part of the virtual impedance is used for suppressing surge current at the beginning of a fault; and the reactance part is used for suppressing the effective value of the fault transient current within the current limiting range. In the fault process, the current virtual impedance value is adaptively changed according to the effective value of the current overcurrent, and the virtual impedance can be automatically quitted after the fault end stage. The method is suitable for fault current suppression of the network-forming converter in various control modes, and has good feasibility and practical value.

The invention discloses a direct-current transformer control method, which relates to the technical field of power electronic control and comprises the following steps of: acquiring operating parameters of a direct-current transformer in real time; the operation parameters at least comprise input side voltage, output side voltage and load current; inputting the operation parameters into a model prediction controller; in the model prediction controller, on the basis of the operation parameters and a preset system model, calculating to obtain a switching device control signal which enables a control target in a future preset time domain to be optimal; a switching device control signal is applied to a switching device of the DC transformer to regulate its output voltage or power. The method has the advantages that the dynamic response speed is increased, the system robustness is enhanced, and multi-target optimization control is realized.

The invention discloses a modular high-voltage direct-current transformer and a control method thereof. The transformer comprises a first energy storage bridge arm, a second energy storage bridge arm and a control switch, the control switch comprises a first group of thyristor valves and a second group of thyristor valves; the first group of thyristor valves comprises an upper thyristor valve and a lower thyristor valve which are respectively used for controlling the charging of the first energy storage bridge arm and the second energy storage bridge arm; the second group of thyristor valves are used for controlling the discharge of the first energy storage bridge arm and the second energy storage bridge arm; the first energy storage bridge arm, the upper thyristor valve and the first diode form a loop, and the second energy storage bridge arm, the lower thyristor valve and the second diode form another loop. According to the invention, the waveform of the bridge arm current is randomly controllable by controlling the bridge arm voltage, the control of the transmission power and the energy balance of the bridge arm are realized, and meanwhile, the active property of the bridge arm can be utilized to realize the reliable turn-off of the soft switch and the thyristor.

The invention relates to a T-connection direct current transformer control method, device and system, a computer readable storage medium and a computer program product. The T-connection direct-current transformer comprises n-phase direct-current conversion modules, and n is larger than or equal to 4. Each phase of DC conversion module comprises a bridge arm formed by connecting a plurality of energy conversion sub-module cascade structures and an electric reactor in series, and two groups of switches, and a common connection end of the two groups of switches connected in series is connected with a first end of the bridge arm; the external connection end of the DC conversion module is used for connecting the high-voltage end, the low-voltage end and the grounding end, and comprises a first end, a second end, a common connection end and a second end of the bridge arm after the two groups of switches are connected in series. The method comprises the following steps: receiving a commutation instruction; in the commutation period, the conduction state of the switch is switched, so that at least an i-phase direct current conversion module is conducted with the low-voltage end at the same moment; 2 < = i < = n-2. By adopting the method, the magnitude of the current which needs to be tolerated by each device can be reduced, so that the T-connection type direct-current transformer meets the requirement of high-capacity application.

The invention discloses an online calculation method and device for broadband impedance of a modular multi-level direct-current transformer, and relates to the field of direct-current transformers, and the method comprises the steps: obtaining the relation of all electric quantities during the steady-state operation of the modular multi-level direct-current transformer based on a circuit topological structure of the modular multi-level direct-current transformer; establishing a power circuit model based on the relation of each electrical quantity during steady-state operation; establishing a control circuit model based on the input and output of the controller group of the modularized multi-level direct current transformer; establishing a small signal impedance model based on the power circuit model and the control circuit model; and calculating the broadband impedance of the modularized multi-level direct-current transformer based on the small-signal impedance model. According to the invention, the broadband impedance of the DC transformer can be calculated on line with high precision and high efficiency in different application scenarios.

The invention relates to a patrol auxiliary decision-making method based on multi-scene perception, and the method comprises the steps: constructing a standard point location label library, mapping the standard point location label library into a patrol point location label library with scene label information, and making a task generation rule under each scene; processing and analyzing the collected data through a deep learning model and scene label information, and identifying a scene where the current transformer substation is located; and generating a patrol task conforming to the scene, automatically executing the patrol task and generating a patrol report, continuously collecting the patrol report, and optimizing the deep learning model through feedback loop. According to the method, the working efficiency of operation and maintenance personnel is improved, the task is automatically created according to the current substation scene, the current substation scene and the real-time state of the patrol host can be quickly analyzed, the optimal patrol plan is generated, and the timeliness and continuity of the patrol task are ensured; according to the real-time environment change, the inspection key point can be rapidly adjusted, the safety of key nodes and lines is preferentially guaranteed, and the continuity and reliability of power supply are ensured.

The invention discloses an enhanced low-voltage topology identification method based on multi-dimensional data combination, and the method comprises the following steps: collecting the physical wiring information of a terminal, and obtaining a wiring database; acquiring terminal position information, and obtaining a community database by using a community division algorithm; collecting electricity utilization characteristic data, and generating an algorithm result database according to the electricity utilization characteristic data by using a topology recognition algorithm; fitting the wiring database, the community database and the algorithm result database to obtain topological data of the current transformer area; and drawing a topological graph of the current transformer area by using the topological data of the current transformer area obtained in the step 2. According to the invention, no unidentified terminal appears in the obtained topological graph, and all terminals are placed at reasonable positions of the topological graph. The virtual nodes obtained through calculation and fitting disappear and are replaced by the actual power cabinet. And each terminal is clearly affiliated to the corresponding power cabinet, so that convenience is provided for finding problems. And the wiring data is associated, so that the drawn topological graph is more vivid and real.

The utility model relates to the technical field of equipment disassembly, and discloses a disassembly tool which comprises a fixed seat, a mounting structure is arranged on the fixed seat, and the mounting structure is suitable for clamping at least part of the fixed seat to the top of an integrated cabinet; a sliding assembly; the hoisting assembly comprises a pulley assembly and a traction piece. According to the disassembling tool, in the field environment, even if a foundation is a stone muddy road surface and the carrying space is limited, transportation and stable installation can be guaranteed, the position of the hoisting assembly can be flexibly adjusted, a converter can be conveniently hoisted at different positions, and the disassembling tool is suitable for various complex field layouts; according to the utility model, the traction piece can be operated manually, so that the problem that an electric tool cannot be used due to inconvenience in on-site electricity taking is avoided, the cost of the tool is greatly reduced, and the tool is convenient to carry and operate.

The invention relates to the technical field of direct-current transformer high-voltage side fault identification and ride-through, and discloses a direct-current transformer high-voltage side fault identification and ride-through method and system, and the method comprises the steps: obtaining a first parameter of a high-voltage side of a target direct-current boosting transformer; acquiring a first fault feature according to the first parameter; the first fault feature is used for identifying a direct-current boosting transformer high-voltage side fault type; and presetting a fault ride-through strategy, and if the first fault feature of any fault type is obtained, starting the fault ride-through strategy. According to the invention, reliable identification and fault ride-through of the DC fault of the collection system can be realized by using the local measurement information of the DC transformer, the method is not influenced by photovoltaic output, the accuracy and efficiency of fault identification are improved, a new idea and method are provided for fault diagnosis of the DC boosting transformer, and the fault diagnosis efficiency of the DC boosting transformer is improved through a control and protection cooperation mode. The accuracy and efficiency of fault recognition are improved, and a new thought and method are provided for fault diagnosis of the direct-current boosting transformer.

The invention relates to a transformer area group optimization method and device, computer equipment and a readable storage medium. The method comprises the following steps: obtaining voltage, current and frequency of each edge node in a to-be-optimized transformer area group, photovoltaic output data of the transformer area group, energy storage charge and discharge state data and electric vehicle charging power data, and presetting various operation constraints set for the transformer area group; and inputting the voltage, the current, the frequency, the photovoltaic output data, the energy storage charge and discharge state data, the electric vehicle charging power data and the various operation constraints into a pre-constructed multi-target optimization model, obtaining optimization strategies meeting the various operation constraints, and performing optimization guidance on the operation of the transformer area group according to the optimization strategies. The transformer area group level multi-objective optimization task is calculated through the cloud high-performance computing cluster, so that an optimization strategy which is more adaptive to the current transformer area group is obtained, edge setting is controlled according to the optimization strategy to execute optimization output, and the load balance and operation robustness of the transformer area group are ensured.

The invention relates to a substation grounding grid corrosion detection and residual life evaluation method and system. The method comprises the following steps: acquiring a measurement point of a substation grounding grid; calibrating the electrochemical workstation by using a standard impedance source; applying a sine alternating current signal in a preset wide frequency range by using the calibrated electrochemical workstation; selecting a preset number of frequency points, collecting impedance values of each measurement point at different frequency points, and calculating an average value of all the impedance values as an impedance value measurement result of the current measurement point; establishing a Randles equivalent circuit model of the measurement point, fitting the impedance value measurement result of the current measurement point and the impedance value calculation result of the Randles equivalent circuit model by using a nonlinear least square method to obtain an optimal fitting parameter, and calculating the corrosion rate of the transformer substation grounding grid; and measuring the thickness of the current transformer substation grounding grid by using a nondestructive testing technology to obtain the residual life of the transformer substation grounding grid.

The invention provides a high-voltage high-capacity self-coupling direct-current transformer. The high-voltage high-capacity self-coupling direct-current transformer comprises a support capacitor, an energy buffer bridge arm and a converter valve assembly, the support capacitor is used for forming a part of power transmission loop; the energy buffer bridge arm is used for realizing main power transmission and forming the other part of power transmission loop; converting of the transformer is achieved by controlling the input number of the bridge arm sub-modules of the energy buffer bridge arm and trigger signals of the converter valve assembly. Meanwhile, the invention provides a commutation working method and a control method of the transformer. Energy transfer from a low-voltage side to a high-voltage side is realized, the efficiency of the transformer is improved, and energy balance of the energy buffer bridge arm is realized; reliable turn-off and approximate zero-voltage conduction of the converter valve are realized by controlling the input number of the energy buffer bridge arm sub-modules, and two closed-loop modes of direct-current voltage and power control are provided at the same time. High-voltage and high-capacity direct-current transformation is realized, and meanwhile, the semi-control device converter valve is used, so that the device cost is reduced.

The invention relates to the technical field of flexible direct-current power transmission, and provides an offshore wind power direct-current sending-out system and a starting control method thereof.The system is characterized in that part of wind turbine generators are gathered through an offshore alternating-current gathering bus, then connected to an offshore booster station, connected to a DRU converter valve of a diode uncontrolled rectifying unit and then connected to an offshore direct-current bus through a first switch; an onshore converter valve of the onshore converter station is connected through a direct-current line, and is finally connected to an onshore alternating-current power grid; part of the wind turbine generators are gathered through the offshore direct current gathering bus, then connected to the direct current transformer, then connected to the offshore direct current bus, connected to the land converter valve of the land converter station through a direct current line and finally connected to the land alternating current power grid. According to the offshore wind power direct-current sending-out system, the DRU converter valve and the direct-current transformer are adopted, the DRU does not need to adopt a series / parallel MMC structure, the problem of black start of the DRU converter valve is solved through the power bidirectional flow characteristic of the direct-current transformer, and the direct-current transformer can conduct power transmission.

The invention discloses an overvoltage suppression method of a resonant direct-current transformer and the resonant direct-current transformer, and relates to the technical field of power electronics. The overvoltage suppression method of the resonant direct-current transformer comprises the following steps: detecting a direct-current output voltage provided by a direct-current output port, and comparing the direct-current output voltage with an output voltage target value of the resonant direct-current transformer; and under the condition that the direct current output voltage is greater than the output voltage target value, dynamically adjusting the internal phase shift delay between the control signals of the first half bridge and the second half bridge so as to adjust the direct current output voltage to be less than or equal to the output voltage target value. According to the embodiment of the invention, the suppression cost of the light-load overvoltage of the resonant direct-current transformer can be reduced, and the reliability of the resonant direct-current transformer is improved.

This invention discloses a winding device for transformer production with tension adjustment function, relating to the field of transformer production technology. The winding device includes a wire feeding frame, a positioning seat, and a power seat. The wire feeding frame is equipped with several fixed shafts. Compared with current transformer production winding devices, this invention achieves dynamic adjustment of wire tension, significantly improving winding accuracy. Through the cooperation of the brake disc and brake at the end of the fixed shaft on the wire feeding frame, the friction force can be adjusted in real time according to the wire feeding speed, ensuring stable wire tension during winding and effectively avoiding problems such as loose coils, excessive tightness, or coil stacking. This invention also includes a positioning mechanism with an eccentricity correction function. During the winding process, if the transformer skeleton axis deviates, the correction component can apply a fine-tuning force to the end of the transformer skeleton to automatically compensate for the eccentricity, making the transformer skeleton axis coincide with the top rod axis again.

A modular multi-level direct-current transformer topology applicable to a multi-voltage-class direct-current power grid, and a control method therefor. The topology comprises a bridge arm inductor, an upper bridge arm, a lower bridge arm and a filter inductor, wherein one end of the bridge arm inductor is connected to a positive electrode of a high-voltage side, and the other end thereof is connected to one end of the upper bridge arm; the other end of the upper bridge arm is connected to one end of the lower bridge arm and one end of the filter inductor; the other end of the lower bridge arm is separately connected to a negative electrode of the high-voltage side and a negative electrode of a low-voltage side; the other end of the filter inductor is connected to a positive electrode of the low-voltage side; and the upper bridge arm and the lower bridge arm each comprise a sub-module string, the sub-module string comprising several sub-modules, which are sequentially connected in series, and the upper bridge arm and the lower bridge arm regulate respective bridge arm voltages by means of controlling the number of inserted sub-modules, so as to realize direct-current voltage conversion between different voltage classes. In the present application, the use of upper and lower sets of chained sub-modules reduces the use of complex assemblies, thereby reducing the cost and the control difficulty, and also improving the safety, reliability and efficiency of a system.

The invention discloses a high-voltage high-power cascade converter which comprises rectifier diodes, a direct-current input bar, an IGBT device, a low-inductance busbar, a cascade output bar, a radiator, a cover plate, a shell assembly and a control assembly. The fuse and the supporting capacitor are detachably connected with the converter through the low-inductance busbar. The radiator is located at the bottom of the shell assembly, a cooling medium connector is arranged on the side portion of the radiator, and the cover plate is used for sealing the top of the shell assembly. The plurality of rectifier diodes and the plurality of IGBT devices are installed on the radiator, and the low-inductance busbar is used for connecting terminals of corresponding polarities of the rectifier diodes and the IGBT devices; the direct current input bar and the cascade output bar are both located above the IGBT device and are arranged in a staggered manner; the DC input bar is connected with the support capacitor through the low-inductance busbar. The cascade output bar adopts a copper bar mode; the control assembly is located above the cascade output row. The invention has the advantages of compact structure, convenience in maintenance, high power and the like.

The invention discloses an alternating-current dynamic power source, which belongs to the field of power sources, and comprises the following steps: a main controller controls a JAWS quantum voltage generator unit to emit a first alternating-current voltage and a second alternating-current voltage according to an output parameter and a time-frequency reference source; the voltage adjusting device carries out voltage conversion processing on the first AC voltage to obtain a first test AC voltage; the current converter performs current conversion processing on the second AC voltage to obtain a second test AC voltage; the voltage acquisition unit calculates a first differential voltage value according to the first AC voltage and the first test AC voltage, and calculates a second differential voltage value according to the second AC voltage and the second test AC voltage; and the main controller calculates the compensation active electric energy according to the first differential voltage value and the second differential voltage value, and compensates the theoretical active electric energy according to the compensation active electric energy to obtain the actual active electric energy. Therefore, by implementing the method, the problem that the electric energy traceability requirement of any wave dynamic load cannot be met in the prior art can be solved.

The invention relates to a power transformer on-line monitoring method, system and device and a medium. An existing power transformer on-line monitoring method cannot carry out self-adaptive adjustment on an operation environment. The method comprises the following steps: acquiring operation data and environment data of a transformer in real time; according to the operation data and the environment data, a corresponding early warning threshold is matched according to a preset threshold adjustment rule; obtaining one or more of the current transformer temperature, the current sudden change rate or the current vibration parameter as a target parameter; calculating the real-time deviation degree of the target parameter relative to the early warning threshold value, and monitoring the change rate of the target parameter; and when the deviation degree and the change rate of the target parameter meet a preset condition, generating a risk early warning signal of a corresponding level. The operation data and the environment data of the transformer are collected in real time, the early warning threshold value is dynamically adjusted according to the preset threshold value adjusting rule and the operation data and the environment data, and the early warning threshold value can adapt to different operation environments and load conditions.

The invention relates to a thermal control method and device, and relates to the technical field of flow battery energy storage, and the method comprises the steps: obtaining the working mode information of a flow battery and the temperature information of a plurality of preset positions, the preset positions at least comprise a galvanic pile liquid inlet pipeline, a galvanic pile liquid outlet pipeline, a prefabricated cabin, a storage tank, a magnetic drive pump and a converter; determining an application scene of the flow battery according to the working mode information and the temperature information; and controlling a cooling liquid shunting module to adjust a distribution path of cooling liquid in a cooling liquid loop so as to adjust the flow battery to a thermal control working condition corresponding to the application scene, the heat control working condition comprises a heating working condition started when the external environment temperature of the prefabricated cabin is lower than a first environment temperature threshold value, a refrigeration working condition started when the external environment temperature of the prefabricated cabin is higher than or equal to a second environment temperature threshold value, and a heat recovery working condition started when the working mode is switched.

The invention discloses a flexible direct-current transformer valve side partition plate system supporting strip fixing structure, and relates to the technical field of flexible direct-current transformer equipment, the flexible direct-current transformer valve side partition plate system supporting strip fixing structure comprises a partition plate system main body, the partition plate system main body is arranged in an ascending flanged base, and the partition plate system main body comprises an abutting part; the fixing assembly comprises a supporting strip and a locking assembly, the supporting strip is arranged between the partition plate system body and the ascending flanged base, the supporting strip is fixedly connected with the ascending flanged base through the locking assembly, the supporting strip comprises a wedge part, and the wedge part is matched with the abutting part in a friction abutting mode; according to the flexible direct current transformer valve side partition plate system supporting strip fixing structure, the supporting strip is arranged between the partition plate system body and the ascending flanged base, and the wedge part of the supporting strip abuts against the abutting part of the partition plate system body, so that tight supporting installation of the partition plate system body relative to the ascending flanged base is achieved, and the vibration influence generated in the transportation process is overcome.

The invention discloses an electric power transformer for urban rail transit, comprising an electric power transformer and an electric pole, wherein two I-beams are fixedly connected to the bottom of the electric power transformer, and the two I-beams are symmetrically arranged on the left and right, a box is arranged between the two I-beams, and rectangular grooves are opened on the left and right sides of the box. The invention can realize that when outdoor rainwater accumulates in the inner cavity of the protective cover, the lifting plate can be moved downward through the mutual cooperation among the fourth spring, the push plate, the horizontal plate, the triangular plate, the vertical rod, the flip plate, the central axis, the lifting plate, the first spring, the bottom rod, the pull rope and other components, when the outdoor rainwater accumulates in the inner cavity of the protective cover, the lifting plate can be restored to move the push plate through the pull rope when the rainwater is discharged, and when the push plate moves, the impurities precipitated in the transformer oil can be cleared, and it can be identified that there are many impurities in the current transformer oil, and the starter is triggered to shut down the electric power transformer to prevent the stability and safety of the electric power system from being threatened.