1001results about "Electric component structural association" patented technology

The invention discloses a transformer equipment oil leakage monitoring method and system based on image recognition, relates to the technical field of image processing, and effectively eliminates static background interference by constructing a standardized image sequence S (t), performing gray gradient analysis and pixel feature extraction, recognizing candidate oil spot areas and constructing a disturbance active score Sx. The edge structure and the morphological stability coefficient of the dynamic oil stain suspected area are further extracted, and the credible level quantitative judgment of the dynamic oil stain suspected area is realized by integrating the characteristic indexes and the morphological stability coefficient, so that the dynamic identification capability and the anti-interference capability are realized; the oil leakage identification accuracy and the system automation risk response capability in a complex environment are improved, false alarm and missing alarm are effectively avoided, and the operation safety of equipment is guaranteed.

The invention relates to the technical field of transformers, in particular to a transformer with a high-temperature early warning device, which comprises a base and a transformer body fixedly mounted on the base, and further comprises a temperature control system, and the temperature control system is used for monitoring the temperature of the transformer body and dynamically analyzing the transformer body. A plurality of sets of cooling fins are fixedly connected to the outer portion of the transformer body, and a plurality of sets of mounting frames are fixedly connected to the base. In the invention, aiming at the defect of incomplete monitoring of a traditional temperature sensor, the temperature control system can realize comprehensive temperature monitoring and dynamic operation analysis of the transformer body, accurately capture internal complex temperature field distribution, and avoid the problem of insulation aging acceleration caused by local high-temperature leak detection; compared with an existing single threshold value control mode, intelligent early warning is achieved through a dynamic analysis technology, a control strategy can be adjusted according to real-time temperature changes, and the limitation that a traditional method lacks state perception is overcome.

The utility model relates to the technical field of transformer parts, and provides a transformer high-voltage lightning arrester mounting support which comprises a supporting transverse plate, a bearing vertical plate, a mounting frame plate, an adjusting unit and a limiting unit. One end of the supporting transverse plate is hinged with the bearing vertical plate, and the other end is fixed with the mounting frame plate; the adjusting unit is arranged above the supporting transverse plate, one end of the adjusting unit is hinged to the bearing vertical plate, the other end of the adjusting unit is fixed to the mounting frame plate, and the adjusting unit is provided with a sliding assembly used for driving the bearing vertical plate to be close to or away from the mounting frame plate; a limiting unit is installed at the upper end of the bearing vertical plate and comprises a supporting disc and a clamping assembly arranged on the supporting disc. The supporting disc is used for supporting a base of the lightning arrester, and the clamping assembly is clamped on the side wall of the base of the lightning arrester. The lightning arrester is fixed in a clamping mode, rapid installation of the lightning arrester is achieved, and the installation and disassembly efficiency of the lightning arrester is improved.

The invention provides a primary resonance elimination device of a power distribution network voltage transformer and a management and control method, and relates to the technical field of voltage transformer resonance elimination. The primary resonance elimination device comprises a primary resonance elimination resistor, a primary resonance elimination power electronic device, a standby resonance elimination resistor and a standby resonance elimination power electronic device; the primary resonance elimination resistor and the primary resonance elimination power electronic device are connected in series and then are connected in series between a neutral point of the power distribution network voltage transformer and a ground wire; the standby resonance elimination resistor and the standby resonance elimination power electronic device are connected in series, one end of the standby resonance elimination resistor and the standby resonance elimination power electronic device which are connected in series is connected with a neutral point of the power distribution network voltage transformer, and the other end is grounded; the primary resonance elimination device further comprises a current transformer and a temperature sensor; the temperature sensor is used for monitoring the temperature values of the primary resonance elimination resistor and the standby resonance elimination resistor; the current transformer is assembled on a line where the primary resonance elimination resistor and the standby resonance elimination resistor are grounded together and used for monitoring the value of current flowing through the primary resonance elimination device.

The application discloses a variable-load super-large capacity dry-type transformer, relates to the related technical field of dry-type transformers, and comprises three groups of main iron core columns and three groups of auxiliary iron core columns, wherein the main iron core column section is provided in a stepped shape, the inside of the main iron core column is stacked by three layers of amorphous alloy strips, the thickness of the middle layer of the three layers of amorphous alloy strips is 1.2-1.5 times that of the two side layers, and the lamination groups in the inside of the auxiliary iron core column are provided with independent lap pieces at the joints. The application realizes uniform magnetic flux density distribution and single-column capacity improvement by combining the stepped section of the three groups of main iron core columns with the magnetic yoke which is thin at the top and thick at the bottom, solves the problems that the single capacity of the traditional dry-type transformer is limited and the whole machine needs to be replaced for capacity expansion, reduces the occupied volume through modular splicing, increases the capacity of a single group of iron core columns, and reduces the no-load loss.

The utility model provides a lightning impulse protection device for a transformer, and relates to the technical field of lightning arresters, the lightning impulse protection device for the transformer comprises a mounting plate, two ends of the mounting plate are respectively provided with a protection mechanism, the protection mechanism comprises two rectangular blocks, the inner walls of the two rectangular blocks are rotatably connected with a rotating shaft, and the rotating shaft is connected with the mounting plate. A rotating shaft is arranged on the outer side of the screw rod, a coil spring is arranged on one side of the rotating shaft, an L-shaped rod is fixedly connected to the outer surface of the rotating shaft, and a piston block is rotationally connected to one end of the screw rod. The piston block slides on the inner wall of the rectangular groove by rotating the screw rod, so that the airbag sheet deforms and expands outwards, the outer side of the joint of the lightning arrester body and the high-voltage line is wrapped and protected, the influence of rain and sun on the outer side of the joint of the high-voltage line and the lightning arrester body is reduced as much as possible, the service life of the lightning arrester body is prolonged, and the use effect of the lightning arrester body is improved.

The invention discloses an OLTC topological structure of an electronic soft switching technology and a driving method. In the topological structure, a power supply is connected with a first transformer, the first transformer is connected with a second transformer, and the second transformer is connected with a load; a low-voltage winding of the first transformer is connected with a plurality of taps; the fixed end of the low-voltage winding of the first transformer and each tap are connected with one end of an independent mechanical switch; according to an interval connection mode, the other ends of all the mechanical switches are connected to form two series switch loops, and each series switch loop is connected with an independent electronic change-over switch to form two series circuits; the two electronic change-over switches are connected in parallel, and the second transformer is connected into a series circuit controlled by the two electronic change-over switches respectively. The mechanical switch and the electronic change-over switch are jointly used, so that short-circuit current and surge voltage cannot be generated when the electronic change-over switch performs state switching, and the quality of output voltage waveforms is improved.

The utility model discloses a transformer gas relay protection structure, which relates to the technical field of power equipment protection, and comprises an insulation protection sleeve, a first sealing cover plate and a second sealing cover plate, and the insulation protection sleeve is located between the first sealing cover plate and the second sealing cover plate. Mounting holes matched with the first sealing cover plate and the second sealing cover plate are formed in the left end and the right end of the insulating protective sleeve respectively, and the first sealing cover plate and the second sealing cover plate are detachably connected to the mounting holes in the left end and the right end of the insulating protective sleeve respectively, so that a closed cavity used for containing the gas relay is defined; the first sealing cover plate and the second sealing cover plate are each provided with an oil pipe hole and a threading hole, the oil pipe holes are used for allowing oil pipes of the gas relays to penetrate through, and the threading holes are used for allowing secondary wires of the gas relays to penetrate through. The gas relay has a simple structure, is convenient to install, and can effectively prevent rainwater and small animals from entering the gas relay through the integral encapsulation and insulation design, thereby effectively improving the safety of equipment.

The invention relates to the technical field of transformers, in particular to an oil-immersed transformer with a tapping regulating switch, which comprises a main oil tank, an iron core is arranged in the main oil tank, a low-voltage winding is arranged around the outer side of the iron core, a high-voltage winding is arranged around the outer side of the low-voltage winding, and the oil-immersed transformer further comprises an auxiliary oil cylinder, the auxiliary oil cylinder is vertically arranged on the rear side of the main oil tank, and a loading and unloading opening is formed in the top of the auxiliary oil cylinder. The whole switch module, including the switch mounting rack, the tap switch and the sealing cover plate, is safely, stably, cleanly and vertically lifted out of the auxiliary oil barrel as a whole through a hydraulic lifting structure formed by the lifting oil cylinder, and meanwhile, the auxiliary oil barrel is communicated with the lifting oil cylinder through the oil way design; oil pumped out from the bottom of the auxiliary oil barrel directly enters the bottom of the lifting oil cylinder to serve as a pushing medium, internal recycling of the oil is achieved, dependence on large hoisting equipment and a large amount of manpower is reduced, and the tap adjusting switch is more flexible and convenient to maintain.

The quantum current transformer based on the optical fiber isolation microwave transmission comprises a high-voltage primary side which comprises a magnetic shielding ring and an NV color center magnetic sensing probe module, and a magnetic sensing probe is arranged in the magnetic shielding ring; at the low-voltage secondary side, the microwave system is used for generating radio-frequency signals in a preset frequency range and transmitting the radio-frequency signals to the NV color center magnetic-sensing probe module, the laser system is used for generating continuous laser and transmitting the continuous laser to the NV color center magnetic-sensing probe module, and the microwave system and the laser system are used in cooperation to drive the NV color center to generate fluorescence signals representing the magnetic field intensity. A fluorescence signal is transmitted to the data processing system to calculate to-be-detected current information; wherein the microwave system is connected with the NV color center magnetic sensing probe module through an optical fiber, the microwave system modulates the radio frequency signal into an optical signal, transmits the optical signal to the NV color center magnetic sensing probe module, and restores the optical signal into the radio frequency signal in the NV color center magnetic sensing probe module to be received. According to the transformer, stable transmission of microwave signals under the high-low voltage isolation condition is achieved, the design is reasonable and exquisite, and the measurement precision is high.

The invention relates to the technical field of relay protection, in particular to a method for identifying excitation surge current of a transformer sent out by a wind power plant based on differential current waveform characteristics and application of the method. Compared with a traditional second harmonic braking method, the method has the advantages that the time window is short, the magnetizing inrush current of the transformer can be quickly identified, and the protection reliability of the sending-out transformer of the wind power plant is improved. The objective of the invention is to solve the problem of how to reliably identify the magnetizing inrush current fault of the wind power plant transformer.

The application provides a coil module, an electronic device and a wireless charging system, and relates to the technical field of wireless charging, and aims to solve the problem that the thickness of the wireless charging coil module is relatively large, which is not conducive to the arrangement of other functional devices in the electronic device. The coil module comprises a coil structure; the coil structure comprises a functional layer; along the thickness direction of the coil structure, the functional layer comprises a first wiring sublayer, a second wiring sublayer and an insulating sublayer located between the first wiring sublayer and the second wiring sublayer; the coil structure further comprises a first end, a second end and a plurality of groups of coils connected in series; the first end and the plurality of groups of coils are arranged on the first wiring sublayer, and the outermost group of coils is connected to the first end; the second end is arranged on the second wiring sublayer; a via hole is arranged on the insulating sublayer, and a connecting structure is arranged in the via hole; the innermost group of coils is connected to the second end through the connecting structure in the insulating sublayer, so that the first end is electrically connected to the second end through the plurality of groups of coils connected in series.

An apparatus such as a power converter includes a transformer assembly, a first series circuit path, and a second series circuit path. The transformer assembly includes multiple windings such as a first winding and a second winding. The first series circuit path includes a first circuit component disposed in series with a first winding of the multiple windings; the second series circuit path including a second circuit component disposed in series with a second winding of the multiple windings. The first series circuit path is connected in parallel with the second series circuit path.

An ignition coil of a non-equal-thickness iron core structure comprises a shell, a low-voltage head is arranged on the upper portion of the shell, a high-voltage sheath assembly is installed on the lower portion of the shell, a coil assembly is transversely arranged in the shell and filled with epoxy resin, the low-voltage head is located at one end of the coil assembly, and an ignition module is arranged in the shell and close to the low-voltage head. The coil assembly comprises a T-shaped iron core, a primary framework arranged outside the T-shaped iron core in a sleeving mode, a secondary framework arranged outside the primary framework in a sleeving mode, a first C-shaped iron core and a second C-shaped iron core, the first C-shaped iron core and the second C-shaped iron core are arranged outside the secondary framework in a surrounding mode, and the first C-shaped iron core and the second C-shaped iron core are oppositely combined together to form an O shape and are connected to the end of the T-shaped iron core. The thickness of the first C-shaped iron core and the thickness of the second C-shaped iron core are larger than that of the T-shaped iron core. As the C-shaped iron core assembly and the T-shaped iron core are of a non-equal-thickness structure, the T-shaped iron core is thin, so that the space of primary and secondary framework structures on the periphery of the iron core is saved, and the requirement for the electrical performance function of the coil is met.

The invention provides a modular non-mechanical regulation variable inductive reactance winding structure, a control method and a device. The structure comprises a module body, an iron core, a coil and a switch unit, the module body is at least provided with a current input end and a current output end; the switch unit is at least provided with a first input end, a first output end and an adjusting end, the first input end is connected with the current input end, and the first output end is connected with the current output end; the iron core is arranged in the module body; the coil is wound on the iron core, and the two ends of the coil are connected to the adjusting ends; and the switch unit is used for selectively connecting the coil between the first input end and the first output end through the adjusting end, so that inductive reactance generated by combined action of the coil and the iron core is selectively connected to a loop where the coil and the iron core are located. The inductive reactance generated by the coil and the iron core is controlled by the switch unit to be selectively connected into the loop, so that the beneficial effects of no fault hidden danger caused by a mechanical structure, rapid adjustment, modular rapid recovery operation and flexible combination mode are achieved.

The invention relates to the technical field of transformers, in particular to a transformer capable of adjusting temperature in a partitioned mode. According to the transformer capable of adjusting the temperature in the partitioned mode, the temperature can be adjusted in the partitioned mode, the equipment operation efficiency is improved, and the service life is prolonged. A transformer capable of adjusting temperature in a partitioned mode comprises a transformer body, a heat dissipation mechanism, a closing mechanism and an adjusting mechanism, the transformer body is provided with the heat dissipation mechanism capable of accelerating heat dissipation efficiency, the heat dissipation mechanism is provided with the closing mechanism capable of conveniently removing impurities, and the transformer body is provided with the adjusting mechanism capable of adjusting the temperature in the partitioned mode. By starting the second motor, the adjusting frame is driven to rotate, the size of an inlet of each area of the circulating pipeline is adjusted, then the cooling water flowing speed of each area of the circulating pipeline is adjusted, and the effects of adjusting the temperature in different areas, improving the equipment operation efficiency and prolonging the service life can be achieved.

The application relates to the electric power electronic technical field, and particularly discloses a four-phase four-column type electric reactor for electric power electronics, which comprises a lower clamp, a connecting rod and an upper clamp, the outer surface of the lower clamp is fixedly installed with the connecting rod, the end, away from the lower clamp, of the connecting rod is fixedly connected with the upper clamp, and a middle column is arranged between the lower clamp and the upper clamp. The four-phase four-column type electric reactor can flexibly fix the middle column and the coil through the limiting assembly, has certain buffering effect on vibration of the equipment, reduces noise generated when the equipment vibrates, can position the middle column when large shaking is generated, prevents the equipment from being damaged due to long-time large shaking, and sends an alarm to remind the staff to timely maintain, can uniformly radiate heat of the equipment through the heat dissipation assembly, makes the temperature of the multiple middle columns and the coil relatively uniform, prevents aging of insulation materials, can transport airflow to the middle column and the coil when accelerating and flowing, thereby better radiating heat, and is convenient for prolonging the service life of the electric reactor.

The invention discloses a digital control system for a transformer cooler, and relates to the technical field of transformer cooling control. Comprising a data acquisition module used for acquiring monitoring data in real time; the thermal load calculation module is used for calculating the current thermal load based on the transformer parameters and the load current; the oil temperature calculation module is used for calculating the predicted oil temperature change at the previous moment by utilizing a preset heat balance equation based on the heat load at the previous moment, the heat dissipation coefficient at the previous moment, the oil temperature at the previous moment and the environment temperature at the previous moment which are obtained in advance; calculating the actual oil temperature change based on the difference value between the actually measured oil temperature at the current moment and the actually measured oil temperature at the previous moment; the heat dissipation coefficient calculation module is used for calculating a prediction error based on the predicted oil temperature change at the previous moment and the actual oil temperature change; the method can dynamically track the actual heat dissipation capacity change of the transformer, improves the hot-spot temperature estimation precision, and provides a precise control basis for a cooling system.

The invention relates to a transformer cooling and fire-fighting dual-purpose device, and particularly relates to the technical field of power equipment, the transformer cooling and fire-fighting dual-purpose device comprises a protection box, one side of the inner wall of the protection box is fixedly connected with a transformer body, a heat dissipation auxiliary mechanism is arranged outside the protection box, and a fire-fighting early warning mechanism is arranged inside the protection box; according to the transformer, the heat dissipation auxiliary mechanism is arranged, in the aspect of heat dissipation, the heat dissipation auxiliary mechanism adopts cooperation of a compressed air bag, a gas conveying pipe, a one-way valve, a gas storage box and a gas injection head, heat dissipation fins can be continuously and effectively cleaned, and the efficient heat dissipation performance of the transformer body is kept; the regular purging and cleaning process of the heat dissipation fins ensures that the transformer body can stably dissipate heat even in high-frequency work, the heat dissipation effect is prevented from being affected by dust accumulation, the overall heat dissipation capacity of the transformer body is effectively improved, and the phenomenon that the temperature is too high due to unsmooth heat dissipation is prevented.

Example methods and systems for leak detection in transformers are disclosed. One example method includes obtaining moisture data of a substance in a power transformer. A functional relationship between relative saturation of moisture of the substance and temperature of the substance is determined based on the moisture data. A gradient of the relative saturation with respect to the temperature of the substance is determined based on the functional relationship. It is determined, based on the gradient, that a leak of moisture of an environment surrounding the power transformer into the power transformer has occurred. In response to determining that the leak has occurred, a visual alert or an audio alert is generated to indicate that the leak has occurred.

The invention discloses a transformer oil level on-line monitoring and early warning method and system and a medium, and relates to the technical field of transformer oil level monitoring, and the method comprises the steps: obtaining historical data in the same time period; preprocessing the historical data to obtain preprocessed data; constructing an oil level prediction model by adopting an LSTM model and fusing an attention mechanism, and training the oil level prediction model to obtain a trained oil level prediction model; inputting top oil temperature, load current and environment temperature data obtained in real time into the trained oil level prediction model for prediction, and outputting a predicted oil level value and an attention weight; and subtracting the actually measured oil level value from the predicted oil level value to obtain a residual error, analyzing the distribution condition of the residual error and the attention weight to obtain a reason causing the current oil level change, and generating an instructive alarm and an operation and maintenance suggestion. According to the invention, early warning before low oil level alarm or fault caused by tiny leakage is realized, specific fault reasons can be analyzed, and corresponding operation and maintenance suggestions can be given.

The present application relates to the technical field of anti-DC current transformer, and discloses an anti-DC current transformer and method based on temperature compensation, which comprises a shell, an iron core is installed on the inner side of the shell, and a transformer coil is wound on the outer side of the iron core, and further comprises a negative temperature resistance compensation system connected in series with the transformer coil, the negative temperature resistance compensation system comprises a NTC negative temperature thermistor R1 and a parallel resistance system composed of a common resistance R3 and a common resistance R2 connected in parallel, and a parallel loop connected in series with the transformer coil, and the equivalent resistance value of the negative temperature resistance compensation system decreases with the increase of ambient temperature.The present application solves the problem of large phase difference / bias difference variation of traditional single-iron-core anti-DC transformer caused by changes in working environment temperature, reduces the phase difference variation caused by temperature from about 15% of the traditional value to 1-2%, and reduces the bias difference variation to within 0.1%, greatly reducing the temperature drift error and improving the transformer precision.

The present application discloses a power supply tie transformer, and a regulation and control method therefor. The power supply tie transformer comprises: a multi-phase parallel transformer, a multi-phase series transformer, and a plurality of safety protection auxiliary adjusting devices. Head terminals of the primary side of the multi-phase parallel transformer are all connected to a first line; the secondary side of the parallel transformer is provided with at least one power supply winding and a plurality of asymmetric windings; the power supply winding is connected to a power supply end; the plurality of asymmetric windings are respectively interconnected to the adjacent phase asymmetric windings of the secondary side of the parallel transformer by means of switch bridge arm modules respectively corresponding to the plurality of asymmetric windings to obtain a first electrical quantity; the first electrical quantity is coupled to the primary side of the series transformer by means of the secondary side of the corresponding series transformer; the plurality of safety protection auxiliary adjusting devices are connected in series between the first line and a second line. The present application realizes transmission of electric energy of a first line and a second line to a power supply end, ties the first line and the second line, and realizes mutual electric energy transmission at specified power between the first line and the second line.

The invention relates to a magnetic assembly, which comprises a magnetic core assembly and a magnetic core, the first magnetic column and the third magnetic column are oppositely arranged and located between the second magnetic column and the fourth magnetic column, and the second magnetic column and the fourth magnetic column are oppositely arranged; the first winding channel comprises a first part formed between the first magnetic column and the second magnetic column and a second part formed between the second magnetic column and the third magnetic column; the second winding channel comprises a first part formed between the first magnetic column and the fourth magnetic column and a second part formed between the third magnetic column and the fourth magnetic column; a part of the first winding is arranged in the first part of the first winding channel, and a part of the first winding is arranged in the second part of the second winding channel; and the second winding is partially arranged in the first part of the second winding channel and partially arranged in the second part of the first winding channel. The invention also relates to a power conversion module.

The invention provides a wireless transformer winding temperature sensor, and belongs to the technical field of transformer temperature control equipment, the wireless transformer winding temperature sensor comprises a base, the top of the base is provided with a voltage transformation mechanism, the front side of the exterior of the voltage transformation mechanism is provided with a wire arrangement mechanism, the interior of the wire arrangement mechanism is provided with a sensing wire, and the top of the voltage transformation mechanism is provided with a clamping mechanism. According to the invention, through the arrangement of the wire arrangement mechanism, effective fixation and management of the sensing wire are realized, stable operation and accurate temperature measurement of the sensor are ensured, and the problem that a wire harness is difficult to disassemble and maintain due to the fact that the sensing wire is fixed by a conventional cable tie in the prior art is solved; according to the utility model, the sensing line probe is firmly fixed and rapidly detached, the accuracy of temperature measurement is ensured, and the problem of measurement interruption or inaccuracy caused by loosening or falling off due to infirm fixation in the prior art is solved. And the disassembly is relatively complicated, so that the maintenance efficiency is influenced.

The utility model provides a transformer cabinet and electronic equipment. The transformer cabinet comprises a cabinet body, a transformer and a buffer resistor. A first installation space and a second installation space are arranged in the cabinet body, and the transformer is arranged in the first installation space and supported on a bottom plate portion of the cabinet body. And a mounting hole corresponding to the transformer is formed in the bottom plate part. And the second mounting space is positioned on one side of the transformer. And the buffer resistor is arranged in the second mounting space and is specifically supported on the side plate part of the cabinet body. According to the transformer cabinet, the transformer and the buffer resistor are integrated in the same cabinet body, so that the structure of the transformer cabinet is more compact, the space utilization rate of the transformer cabinet is improved, the occupied area is effectively reduced, the length of a connecting cable between functional parts is shortened, the material cost is reduced, the wiring complexity is simplified, and the wiring efficiency is improved. And the installation and debugging convenience is further improved. The electronic equipment provided by the utility model comprises the transformer cabinet, so that the electronic equipment also has the advantages of the transformer cabinet.

The invention relates to an epoxy resin pouring type transformer with built-in microcirculation cooling channels and a heat dissipation method of the epoxy resin pouring type transformer, and belongs to the technical field of power transformers. The epoxy resin pouring type transformer comprises an iron core, a low-voltage winding, a high-voltage winding and a heat dissipation shell, the low-voltage winding and the high-voltage winding are completely impregnated and wrapped by an epoxy resin composite material through a vacuum pouring process, an integrated epoxy resin pouring body is formed after curing, and a three-dimensional communicated bionic microcirculation cooling channel network is arranged in the epoxy resin pouring body; the heat dissipation shell is in close contact with the outer surface of the epoxy resin pouring body through the high-heat-conductivity insulating medium. According to the invention, the heat dissipation efficiency can be remarkably improved, and a cooling medium (air) is directly guided to a microscopic area around the winding conductor through a three-dimensional communicated and tree-shaped fractal bionic microcirculation cooling channel network, so that the effective heat exchange area and the heat exchange strength are greatly increased, and internal heat can be accurately and efficiently taken away.

This invention discloses an intelligent single-phase grounding fault location and monitoring device, relating to the field of single-phase grounding fault location and monitoring devices. The invention includes an outer casing, a grounding transformer fixedly installed on one side inside the outer casing, and a substation main body fixedly installed on the other side inside the outer casing. Heat sinks with uniform spacing are fixedly installed around the grounding transformer. The interior and bottom of the outer casing are equipped with a heat dissipation device for cooling the grounding transformer and substation main body in high-temperature weather. The heat dissipation device includes a first heat dissipation component, a water collection component, and a second heat dissipation component. This invention solves the problems of poor heat dissipation effect in high-temperature weather with air cooling and the high water source requirements and limited application of water cooling methods in existing single-phase grounding fault location and monitoring devices by using air cooling and evaporative cooling.

A method of controlling the magnetic saturation of the core of a DC common mode choke comprising a magnetic core 1 and first and second coils 2, 3, comprises: determining the saturation percentage of

The utility model discloses an intelligent penholder type ignition coil which comprises a penholder type shell (a top inner cavity is provided with a circuit board with a chip, and a penholder part comprises an iron core, a framework, a coil winding and a high-pressure connector), and the outer wall of the shell is provided with an annular limiting sleeve for controlling the distance between the chip and a cylinder body; the outer wall of the penholder part is sleeved with a grounded stainless steel sleeve (shielding signal interference), a top inner cavity is provided with a heat insulation plate (a circuit board is mounted on the heat insulation plate, and a heat insulation pad is arranged therebetween); and the steel sleeve is provided with a matched limiting opening (positioning after insertion, and heat dissipation holes are formed in the outer wall). The environment temperature of the chip is reduced through the heat insulation structure, the steel sleeve shields signal interference and assists in heat dissipation, the problems of chip high-temperature damage, signal interference and insufficient heat insulation in the prior art are solved, and the reliability of an ignition system is improved.