Combined mutual inductor and detection system and method thereof

Abstract

The invention belongs to the technical field of mutual inductor detection, and particularly relates to a combined mutual inductor and a detection system and method thereof.The combined mutual inductor comprises a local heat treatment machine body, a mounting shell and a temperature control assembly, a wiring terminal is arranged at the top of the mounting shell, and the wiring terminal is electrically connected with a mutual inductance assembly in the mounting shell; the temperature control assembly is used for controlling the temperature of the working environment in the mounting shell; the cooling pipes in the temperature control assembly extend to the side wall and the top area of the mounting shell, and after cooling airflow in the cooling pipes flows out of the uniformly-arranged cooling holes, the mutual inductance assembly located in the inner area of the mounting shell is subjected to transverse airflow blown from the side wall and vertical airflow blown downwards from the top at the same time; the multi-directional air flow can better bypass obstacles and permeate into gaps of complex structures such as the mutual inductance assembly and the like, is in full contact with various mutual inductance elements, absorbs heat and takes away the heat, and normal operation of the combined mutual inductor is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of mutual inductor detection, in particular to a combined mutual inductor and a detection system and method thereof. Background Art

[0002] To transmit electrical energy, power systems often use AC voltage and high current circuits to deliver power to users, making direct measurement impossible with instruments. The function of a transformer is to proportionally reduce the AC voltage and high current to values that can be directly measured by instruments, facilitating direct measurement. The transformer also provides power for relay protection and automatic devices.

[0003] A transformer used in power systems is a special transformer that transmits information about the high voltage and high current of the power grid to the metering, measuring instruments, relay protection, and automatic devices on the low voltage and low current secondary side. It serves as a connecting element between the primary and secondary systems, with its primary winding connected to the power grid and its secondary windings interconnected with measuring instruments, protection devices, and other devices. The transformer, in conjunction with measuring instruments and metering devices, can measure the voltage, current, and electrical energy of the primary system; in conjunction with relay protection and automatic devices, it can provide electrical protection and automatic control for various faults in the power grid. The performance of the transformer directly affects the accuracy of power system measurements and the reliability of relay protection devices. Combination transformers, consisting of a current transformer and a voltage transformer, are often installed in high-voltage metering boxes and cabinets, and are used to measure electrical energy or serve as a power source for relay protection devices in powered equipment.

[0004] During the operation of the combination transformer, it is necessary to control the working temperature of the internal processing environment within a safe range. Therefore, for some working environments with larger volumes and poor indoor air flow, it is necessary to set up an active cooling structure to accelerate the air flow rate inside the combination transformer and control the temperature through a cooling fan. For the existing air cooling method, considering the various mutual inductance components inside the combination transformer and their various connection structure shapes and installation complexity, the blowing effect of the cooling airflow in a single direction is easily hindered, resulting in insufficient contact between the cooling airflow and various components in the internal working environment, resulting in unsatisfactory air cooling effect. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a combined mutual inductor and a detection system and method thereof.

[0006] The present invention solves the technical problem by adopting the following technical solution: the present invention proposes a combined mutual inductor, comprising a mounting housing and a temperature control assembly, wherein a wiring terminal is provided on the top of the mounting housing, the wiring terminal is electrically connected to the mutual inductor assembly inside the mounting housing, and the temperature control assembly is used to control the temperature of the working environment inside the mounting housing; The temperature control assembly includes a temperature control block, which is arranged at both sides of the mounting shell, and a purification assembly is provided in a temperature control cavity inside the temperature control block and communicates with the outside world. A cooling fan inside the temperature control cavity draws in external airflow, which is purified by the purification assembly and then sent to the interior of a cooling pipe provided in the inner wall of the mounting shell; The cooling pipes are distributed on the top and side walls of the mounting shell and communicate with the internal area of the mounting shell; an air outlet is provided at the bottom of the mounting shell, which communicates with the outside world and conducts away the heat generated by the mounting shell.

[0007] Preferably, the purification component includes a closing cover slidably arranged at the air inlet of the side wall of the temperature control chamber, the closing cover is a square box structure, the interior of which is hollow to form a purification chamber, the interior of the purification chamber is filled with purification filler, and the closing cover is connected to the propulsion device arranged horizontally inside the temperature control chamber; A limiting net is provided on the opening of one side of the purification chamber close to the interior of the temperature control chamber, an air inlet pipe is vertically provided inside the closing cover, the top of the air inlet pipe extends to the top of the closing cover and communicates with the outside world, and a vent is provided on the side wall of the air inlet pipe and communicates with the gap area of the purification filler.

[0008] Preferably, the limiting net is elastically connected to the inner wall of the purification chamber, and the limiting net is connected to the output end of a mechanical vibration device installed inside the purification chamber.

[0009] Preferably, vibration rods are evenly arranged on the surface of the limiting net, and the vibration rods are elastic rods. The ends of the vibration rods are connected to the inner wall of the purification chamber and pass through the purification filler gap area inside the purification chamber.

[0010] Preferably, the purification filler includes dry adsorption particles and conductive particles, the dry adsorption particles are made of non-metallic insulating material, the density of the dry adsorption particles is smaller than that of the conductive particles, and the particle size of the dry adsorption particles is larger than that of the conductive particles.

[0011] Preferably, the top of the air inlet pipe is rotatably connected to the inner wall of the purification chamber, and the bottom of the air inlet pipe is connected to the output end of the rotating device in the bottom inner wall of the purification chamber, and the outer surface of the air inlet pipe is evenly provided with spiral flaps.

[0012] Preferably, the area near the bottom of the closing cover is the collection area, and the part of the closing cover located on the upper side of the collection area and corresponding to the vent is the adsorption area; the collection area is made of metal conductive material, and the adsorption area is made of non-metallic insulating material.

[0013] Preferably, the limiting net and the vibration rod are both made of conductive metal material, and the limiting net is connected to the bottom of the temperature control block through a flexible metal wire and is grounded; The surface of the vibration rod is covered with an elastic film with one side being insulated, and the surface of the elastic film is evenly provided with contact grooves, the width of the contact grooves being larger than the particle size of the conductive particles and smaller than the particle size of the dry adsorption particles.

[0014] A combined transformer detection system, which is used to perform performance testing on the combined transformer. The combined transformer detection system includes a metering error analysis module, an insulation performance detection module, a temperature rise detection module, and a mechanical performance detection module. The metering error analysis module is used to detect the metering accuracy of the combined transformer when it is connected to the power distribution network; The insulation performance detection module is used to detect the insulation performance of the installation shell; The temperature rise detection module is used to simulate the temperature regulation performance of the temperature control component on the internal area of the installation shell under overload conditions; The mechanical performance detection module is used to detect the mechanical properties of the corresponding components of the installation shell and the temperature control block, including vibration resistance, impact resistance, and corrosion resistance.

[0015] A combined mutual inductor detection method, which uses the above-mentioned combined mutual inductor detection system, is characterized in that the specific steps of the detection method are: S1, test preparation: check the connection position of the combined transformer to be tested, confirm the wiring is correct, determine the model and voltage level, set the standard source parameters, start the safety protection device, and eliminate interference factors; S2, Error Detection: Move the combined mutual inductor to be tested to the corresponding station of the measurement error analysis module, start the standard source output signal, collect the secondary signal of the combined mutual inductor to be tested, calculate the ratio error and angle error, repeat the process multiple times, take the average value, compare it with the standard value, determine whether it is qualified, and record and store the data; S3, Insulation and Temperature Difference Testing: Using the insulation performance testing module, the test transformer is subjected to insulation resistance and power frequency withstand voltage tests to determine whether the insulation performance is qualified. Subsequently, at the corresponding station of the temperature rise detection module, the internal operating temperature of the installation housing is monitored under rated load and overload conditions to determine the operation of the temperature control component. S4, comprehensive evaluation: Summarize the data obtained from each test item and compare it with the qualified standards to determine whether the tested combined transformer is qualified, and generate a test report for archiving.

[0016] The beneficial effects of the present invention are as follows: The combined mutual inductor and its detection system and method described in the present invention are such that, by arranging cooling pipes extending to the side walls and top areas of the mounting shell, the cooling airflow flowing into the interior of the cooling pipes flows out from cooling holes evenly arranged on the side walls of the cooling pipes, so that the mutual inductance components located in the interior area of the mounting shell are simultaneously subjected to lateral airflow blowing from the side walls and vertical airflow blowing downward from the top. The multi-directional airflow can better bypass or penetrate into gaps in complex structures such as the mutual inductance components, and fully contact various mutual inductance elements, absorbing and carrying away the heat generated during operation, so that the complex structures and elements inside the combined mutual inductance components are fully cooled, thereby ensuring the normal operation of the combined mutual inductance components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 is a three-dimensional diagram of the combined mutual inductor of the present invention; Figure 2 is a partial cross-sectional view of the combined mutual inductor of the present invention; Figure 3 yes Figure 2 A partial enlarged view of point A in the middle; Figure 4 yes Figure 3 A partial enlarged view of point B in the middle; Figure 5 is a perspective view of the closure cover of the present invention; Figure 6 This is a schematic diagram of the connection between the vibration rod and the limiting net in the present invention; Figure 7 It is a flow chart of the combined mutual inductor detection method in the present invention.

[0019] In the figure: installation shell 1, cooling pipe 11, air outlet 12, temperature control component 2, temperature control block 21, temperature control chamber 22, cooling fan 221, air inlet 222, closing cover 23, purification chamber 231, limiting net 232, air inlet pipe 233, air vent 234, vibration rod 235, flip plate 236, collection area 237, adsorption area 238, elastic membrane 24, contact groove 241, metal wire 25, mutual inductance component 3. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings shown in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1: As shown in the accompanying drawings Figures 1-6 As shown, the present application proposes a combined mutual inductor, including a mounting housing 1 and a temperature control component 2. A wiring terminal is provided on the top of the mounting housing 1, and the wiring terminal is electrically connected to the mutual inductance component 3 inside the mounting housing 1. The mutual inductance component 3 includes a winding, an iron core, and an insulating shielding structure, all of which are arranged inside the mounting housing 1. The temperature control component 2 is used to control the temperature of the working environment inside the mounting housing 1; The temperature control assembly 2 includes a temperature control block 21, which is arranged on both sides of the installation shell 1. A purification component is provided in the temperature control cavity 22 inside the temperature control block 21 and is communicated with the outside. A cooling fan 221 inside the temperature control cavity 22 draws in external airflow, which is purified by the purification component and then sent to the interior of the cooling pipe 11 provided on the inner wall of the installation shell 1. The cooling pipes 11 are distributed on the top and side walls of the mounting shell 1 and communicate with the internal area of the mounting shell 1; an air outlet 12 is set at the bottom of the mounting shell 1, the air outlet 12 communicates with the outside world, and outputs the airflow and heat inside the mounting shell 1.

[0022] Specific work flow: The combined mutual inductor is an electrical device that integrates the current transformer and the voltage transformer in a certain way. The mutual inductance related components in the current transformer and the voltage transformer are integrated into the interior of the installation shell 1, and are connected to the medium and high voltage power distribution system through the terminal blocks on the installation shell 1. In this way, the conversion, measurement and protection functions of the line current and voltage can be realized at the same time. The core principle of this application is to use the electromagnetic induction principle through structures such as windings and iron cores to complete the conversion from high voltage and large current to low voltage and small current, combining the functions of the two mutual inductors to achieve measurement and protection of the circuit system; During this process, when the internal mutual inductance component 3 runs for a long time, the heat of the winding, iron core and other components accumulates inside the installation shell 1, which can easily cause the internal temperature of the installation shell 1 to be too high, affecting the normal operation of the internal mutual inductance component 3, and even causing the components or connecting circuits of the mutual inductance component 3 to burn out, short-circuit and other faults, causing electrical accidents; therefore, the present application sets a temperature control component 2. When the temperature control sensor detects that the internal temperature of the installation shell 1 is too high, affecting normal and safe operation, the cooling fan 221 inside the temperature control cavity 22 is started, and the air inside the temperature control cavity 22 is drawn into the cooling pipe 11, so that a negative pressure environment is formed inside the temperature control cavity 22, prompting the external airflow to accelerate and flow into the temperature control cavity 22 to form a cooling airflow, and the cooling airflow will pass through the purification component and be purified; the purification component can use a filter mesh or filter cloth structure as needed to filter and purify the incoming cooling airflow; the purified cooling airflow is continuously sent to the cooling pipe 11, and then enters the interior of the installation shell 1, accelerating the air flow in the internal area of the installation shell 1, and realizing the cooling of the mutual inductance component 3 inside the installation shell 1; Specifically, considering the complexity of the various mutual inductance components 3 and their various connection structures inside the mounting shell 1, the cooling airflow blowing in a single direction is easily obstructed, resulting in an insufficient air cooling effect; therefore, a cooling pipe 11 is provided to extend to the side wall and top area of the mounting shell 1, and the cooling airflow flowing into the cooling pipe 11 flows out from the cooling holes evenly arranged on the side wall of the cooling pipe 11, so that the mutual inductance components 3 located in the internal area of the mounting shell 1 are simultaneously subjected to the lateral airflow blowing from the side wall and the vertical airflow blowing downward from the top. The multi-directional airflow can better bypass obstacles and penetrate into the gaps of complex structures such as the mutual inductance components 3, and fully contact with various mutual inductance components, absorb the heat generated during operation, and carry it away; Because the air outlet 12 is arranged in the middle position of the bottom of the mounting shell 1, and a mounting plate is arranged on the upper side of the air outlet 12, it is convenient to install the upper mutual inductance component 3. Through holes are evenly arranged on the mounting plate. When cooling is required, the closing cover 23 on the air outlet 12 is opened, so that the multi-directional cooling airflow blown from the side wall and top of the mounting shell 1 contacts the mutual inductance component 3, passes through the through holes of the mounting plate at the bottom of the mutual inductance component 3, and flows out from the opened air outlet 12, thereby realizing the derivation of the cooling airflow after absorbing heat; the closing cover 23 can be opened manually, or it can be set to a rotating connection, and a power structure such as a motor is installed at the rotating connection part, and the closing cover 23 is started under the action of an external controller to realize automatic opening and closing; And because during the operation of the mutual inductance component 3 inside the installation shell 1, impurities such as residues produced by high-temperature burning are easily enriched at the bottom of the installation shell 1 under the action of gravity, the cooling airflow is set to flow in from multiple directions and then flow out from the bottom. On the one hand, it can prevent the residue accumulated at the bottom from being blown up by the cooling airflow and penetrating and adhering to the mutual inductance component 3, thereby affecting the normal operation of the mutual inductance component 3; on the other hand, when the airflow passes through the bottom area and flows out, it can also blow away and take away the residue and impurities that may accumulate in the bottom area, thereby reducing the impact of the residue and impurities generated during operation on the normal operation of the mutual inductance component 3, thereby ensuring the normal operation of the combined mutual inductor.

[0023] Example 2: Based on the first embodiment, the purification assembly includes a closed cover 23 slidably arranged at the air inlet 222 on the side wall of the temperature control chamber 22. The closed cover 23 is a square box-shaped structure with a hollow interior forming a purification chamber 231. The purification chamber 231 is filled with a purification filler. The closed cover 23 is connected to a propulsion device provided inside the temperature control chamber 22. The propulsion device is controlled by an external controller and can drive the closed cover 23 to move back and forth laterally. A limiting net 232 is provided at an opening on one side of the purification chamber 231 close to the interior of the temperature control chamber 22, and an air inlet pipe 233 is vertically provided inside the closing cover 23. The top of the air inlet pipe 233 extends to the top of the closing cover 23 and communicates with the outside world, and the side walls of the air inlet pipe 233 are evenly provided with air vents 234 and communicate with the gap area of the purification filler.

[0024] Specific work flow: On the basis of the specific work flow in Example 1, in order to prevent external dust and impurities from penetrating from the opening position of the mounting shell 1 into the interior of the mounting shell 1 when the temperature control component 2 is not working, affecting the operation safety of the mutual inductance component 3 inside the mounting shell 1; the air inlet position of the temperature control block 21 is set to be hidden. Specifically, a closing cover 23 is slidably set inside the air inlet 222 on the side wall of the temperature control block 21. Under normal circumstances, the closing cover 23 is embedded in the air inlet 222, and the top opening of the air inlet pipe 233 on the top of the closing cover 23 is in the gap between the closing cover 23 and the inner wall of the air inlet 222, which is closed and hidden, preventing adverse effects such as external water vapor, dust and impurities from penetrating through the air inlet 222 and threatening the normal operation of the internal mutual inductance component 3.

[0025] When the temperature inside the installation shell 1 is too high and the temperature control component 2 needs to be started, the control propulsion device is started to drive the closing cover 23 to slide horizontally out of the air inlet 222. At this time, the top opening of the air inlet pipe 233 is exposed and directly connected to the outside world; with the start-up of the cooling fan 221, a negative pressure is formed inside the temperature control chamber 22, prompting the outside air to flow in along the top opening of the air inlet pipe 233, and then enter the gaps between the purification fillers in the purification chamber 231 from the air vents 234 evenly arranged on the side walls of the air inlet pipe 233, and penetrate through the gaps between the purification fillers and flow into the cooling pipe 11; in this process, the purification filler is selected to be a type that can absorb water vapor or dust. The specific selection can be based on the characteristics of the surrounding working environment. The cooling airflow that infiltrates and flows in is purified by the purification filler to remove the components that have adverse effects on the mutual inductance component 3, so that the cooling airflow can fully cool the mutual inductance component 3 and other structures while ensuring the safe operation of the mutual inductance component 3.

[0026] Example 3: On the basis of Example 2, the limiting net 232 is elastically connected to the inner wall of the purification chamber 231, and the limiting net 232 is connected to the output end of the mechanical vibration device on the inner wall of the purification chamber 231. The specific elastic connection method can be that the limiting rod at the end of the limiting net 232 is slidably embedded in the limiting hole on the inner wall of the purification chamber 231, and is connected to the spring on the inner wall of the limiting hole; the mechanical vibration device can use a miniature vibration motor and be directly installed on the limiting net 232. After starting, it drives the limiting net 232 to vibrate vertically at high frequency; the limiting net 232 is evenly provided with a vibration rod 235 on the side surface close to the inside of the purification chamber 231, and the end of the vibration rod 235 extends horizontally through the gap area of the purification filler and is connected to the inner wall of the purification chamber 231. The vibration rod 235 is an elastic rod, and the end of the vibration rod 235 extends into the gap area between the air inlet pipe 233.

[0027] Specific work flow: Based on the specific work flow in Example 2, the mesh of the limiting net 232 is smaller than the particle size of the purification filler, which plays a limiting role on the purification filler inside the purification chamber 231 to avoid leakage loss of the purification filler; in order to ensure the permeability of the cooling airflow through the purification filler and ensure the loose structure of the purification filler, during the process of the cooling airflow penetrating through the purification filler, the mechanical vibration device is started to drive the limiting net 232 to vibrate, thereby transmitting the vibration effect to the internal purification filler, so that the purification fillers collide and move with each other under the action of vibration, the gap increases, and are fully mixed with the infiltrating cooling airflow, and the efficiency of the cooling airflow passing through the purification filler gap is improved, thereby ensuring the cooling efficiency of the mutual inductance component 3 inside the installation shell 1; Furthermore, in order to better transmit the vibration effect to the part of the purification filler away from the limiting net 232, a vibration rod 235 connected to the limiting net 232 is set to extend into the purification filler, so that the mechanical vibration device connected to the limiting net 232 drives the elastic vibration rod 235 to vibrate while vibrating, and transmits the vibration effect to the purification filler away from the limiting net 232 area, so that this part of the purification filler is subjected to the vibration effect of the vibration rod 235 during the contact process with the vibration rod 235, collides and moves with each other, and causes the parts of the purification filler that have a tendency to agglomerate due to the absorbed water vapor and dust to disperse from each other due to the vibration effect, thereby ensuring the loose state of the purification filler, improving the permeability of the cooling airflow in the gap between the purification fillers, and the contact degree between the purification filler and the cooling airflow, ensuring that the cooling airflow is fully purified by the purification filler, and the mutual inductance component 3 inside the installation shell 1 can normally play a cooling and temperature control role.

[0028] Example 4: Based on Example 3, there are multiple options for selecting the type of purification filler. This example provides a possible technical solution. Specifically, the purification filler includes dry adsorption particles and conductive particles. The dry adsorption particles are made of non-metallic insulating material and are prone to static electricity accumulation and can adsorb dust and impurities, such as dry silica gel particles. The conductive particles can be metal particles, such as iron or copper metal particles; the density of the dry adsorption particles is less than the density of the conductive particles, and the particle size of the dry adsorption particles is larger than the particle size of the conductive particles; the top of the air inlet pipe 233 is rotatably connected to the inner wall of the purification chamber 231, and the bottom of the air inlet pipe 233 is connected to the output end of the rotating device in the bottom inner wall of the purification chamber 231. The rotating device here can be a micro motor device and is controlled by an external controller. The outer surface of the air inlet pipe 233 is evenly provided with spiral flip plates 236.

[0029] Specific workflow: Based on the specific workflow in Example 3, since the purification filler is obtained by mixing two types of dry adsorption particles and conductive particles, and the particle densities of the two are different, during the vibration process, the conductive particles, due to their smaller size and higher density, gradually penetrate downward and accumulate in the bottom area of the purification chamber 231 after the purification filler is stratified, while the dry adsorption particles are mainly distributed in the middle and upper areas of the purification chamber 231, corresponding to the vents 234 distributed on the side wall of the air inlet pipe 233; In this way, the cooling airflow flowing in from the outside and out of the vent 234 enters the purification chamber 231, penetrates the gaps between the dry adsorption particles and fully contacts the dry adsorption particles. During this process, the moisture in the cooling airflow is absorbed by the dry adsorption particles, thereby making the cooling airflow dry. At the same time, because the dry adsorption particles are made of silica gel insulation material, and in the electric field environment around the mutual inductance component 3, the friction between the dry adsorption particles causes the accumulation of static electricity, thereby improving the dry adsorption particles' adsorption effect on dust and impurities in the cooling airflow, further improving the purification efficiency of the cooling airflow. After working for a period of time, as dust and impurities adhere to and accumulate in the dry adsorption particles, the normal functioning of the dry adsorption particles is affected, and the dry adsorption particles need to be cleaned at this time; specifically, the cooling fan 221 can be controlled to start in reverse, and air flow can be drawn in from the original air outlet 12, so that it forms a clean air flow that flows in the reverse direction inside the temperature control chamber 22; it should be noted that at this time, a filtering and purification structure such as a filter screen needs to be set at the air outlet 12 position to prevent dust and impurities in the clean air flow from polluting the internal working environment of the combined mutual inductor; the infiltration flow of the clean air flow in the gap area of the clean filler can effectively wash away the dust and impurities adhered to the surface of the clean filler, and finally the clean air flow carries away the dust and impurities and flows to the outside along the air inlet pipe 233, thereby completing the cleaning operation of the clean filler; During this process, in order to reduce the static electricity of the dry adsorption particles and better release the dust on the dry adsorption particles, the rotating device is started to drive the air intake pipe 233 to rotate, thereby driving the spiral flip plate 236 provided on the outer surface of the air intake pipe 233 to rotate, so that the conductive particles accumulated in the bottom area are pushed by the flip plate 236 and move upward along the surface of the flip plate 236, and then diffuse to the surrounding area under the action of centrifugation, so that the conductive particles and the dry adsorption particles are mixed more evenly; at this time, because the conductive particles are evenly distributed in the gaps between the dry adsorption particles, the insulating environment of the dry adsorption particles is broken, and the static electricity on the dry adsorption particles is accelerated to be transferred to the outside world through the evenly distributed conductive particles, thereby reducing the static electricity on the dry adsorption particles and releasing the adsorption limiting effect on dust impurities; The surface of the conductive particles is set to be rough, so that with the friction and mutual contact and collision between the conductive particles and the surface of the dry adsorption particles, dust and impurities are separated from the surface of the dry adsorption particles and leave with the flowing cleaning airflow, thereby achieving purification of the dry adsorption particles; after the cleaning is completed, the rotating equipment is turned off, and with the subsequent multiple starts of the mechanical vibration device, the purification filler will be stratified again, so that the conductive particles sink again and are enriched in the bottom area of the purification chamber 231, while the dry adsorption particles are in the upper and middle areas, and static electricity accumulates again due to the continuous vibration and friction, and the adsorption purification of the incoming cooling airflow is carried out normally, thereby ensuring the cooling of the mutual inductance component 3.

[0030] Embodiment 5: Based on the fourth embodiment, the area near the bottom of the mounting housing 1 is the collection area 237, and the portion of the mounting housing 1 corresponding to the vent 234 is the adsorption area 238; the collection area 237 is made of a metal conductive material, and the adsorption area 238 is made of a non-metallic insulating material; the limiting net 232 and the vibration rod 235 are both made of a metal conductive material, and the limiting net 232 is connected to the bottom of the temperature control block 21 via a metal wire 25 and is grounded; The surface of the vibration rod 235 is covered with an elastic film 24 with one side being insulated, and the surface of the elastic film 24 is evenly provided with contact grooves 241 . The width of the contact grooves 241 is larger than the particle size of the conductive particles, but smaller than the particle size of the dry adsorption particles.

[0031] Specific workflow: Based on the specific workflow in Example 4, the limiting mesh 232 is made of a conductive material. This can prevent the dry adsorption particles near the limiting mesh 232 from adhering to the limiting mesh 232 due to static electricity and agglomerating into a cluster, which affects the permeability of the limiting mesh 232. In addition, for the dry adsorption particles in the internal area of the purification chamber 231, only the part close to the limiting mesh 232 will have static electricity discharged, while the part away from the limiting mesh 232 is in the insulating environment of the adsorption area 238. As the vibration and mutual friction occur, static electricity continues to accumulate, thereby playing the role of drying, adsorbing, and purifying impurities in the cooling airflow passing through the gap. When the rotating device is started to clean the dry adsorption particles, as the conductive particles are evenly distributed inside the adsorption area 238 and are located in the gaps between the dry adsorption particles, a relatively complete conductive network is formed, which transmits static electricity to the side wall of the collection area 237 at the bottom or the position limiting net 232, and then transmits it to the ground position through the metal wire 25 to achieve static discharge. In this way, the dust and impurities previously adsorbed and restricted by the dry adsorption particles can be better separated, thereby better achieving self-cleaning of the dry adsorption particles and facilitating the normal subsequent cooling work. Furthermore, in order to better improve the efficiency of removing static electricity, the vibration rod 235 is set to a conductive material and the surface is covered with an elastic membrane 24. Normal dry adsorption particles are in contact with the vibration rod 235. Because the thickness of the elastic membrane 24 is greater than the particle size of the dry adsorption particles and the width is smaller, the dry adsorption particles will be intercepted by the elastic membrane 24 and will not directly contact the internal vibration rod 235, thereby maintaining the electrostatic adsorption effect of the dry adsorption particles; when the dry adsorption particles need to be cleaned, the conductive particles are diffused into the gaps between the dry adsorption particles. At this time, the conductive particles pass through the contact grooves 241 on the surface of the elastic membrane 24 and directly contact the vibration rod 235, so that the vibration rod 235 is connected to the conductive network formed by the evenly distributed conductive particles, increasing the path for static electricity desorption, thereby more efficiently reducing the electrostatic adsorption effect of the dry adsorption particles and improving the self-cleaning efficiency of the dry adsorption particles.

[0032] Example 6: Based on the above embodiment, a combined transformer detection system is provided. The detection system is used to perform performance detection on the above-mentioned combined transformer. The combined transformer detection system includes a metering error analysis module, an insulation performance detection module, a temperature rise detection module, and a mechanical performance detection module. The metering error analysis module is used to detect the metering accuracy of the combined transformer when it is connected to the power distribution network. The insulation performance detection module is used to detect the insulation performance of the installation shell 1; the temperature rise detection module is used to simulate the temperature regulation performance of the temperature control component 2 on the internal area of the installation shell 1 under overload conditions; the mechanical performance detection module is used to detect the mechanical properties of the corresponding components of the installation shell 1 and the temperature control block 21, including vibration resistance, impact resistance, and corrosion resistance.

[0033] Embodiment seven: As shown in the accompanying drawings Figure 7 As shown, based on the above embodiment, a combined mutual inductor detection method is provided. The detection method uses the above combined mutual inductor detection system to perform performance detection on the combined mutual inductor mentioned in the above embodiment. The specific steps of the detection method are as follows: S1, test preparation: check the connection position of the combined transformer to be tested, confirm the wiring is correct, determine the model and voltage level, set the standard source parameters, start the safety protection device, and eliminate interference factors; S2, Error Detection: Move the combined mutual inductor to be tested to the corresponding station of the measurement error analysis module, start the standard source output signal, collect the secondary signal of the combined mutual inductor to be tested, calculate the ratio error and angle error, repeat the process multiple times, take the average value, compare it with the standard value, determine whether it is qualified, and record and store the data; S3, Insulation and Temperature Difference Testing: Using the insulation performance testing module, perform insulation resistance and power frequency withstand voltage tests on the test combined transformer to determine whether the insulation performance is qualified. Then, at the corresponding station of the temperature rise detection module, monitor the internal operating temperature of the installation housing 1 under rated load and overload conditions, thereby determining the operation status of the temperature control component 2. S4, comprehensive evaluation: Summarize the data obtained from each test item and compare it with the qualified standards to determine whether the tested combined transformer is qualified, and generate a test report for archiving.

[0034] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined mutual inductor, comprising a mounting housing (1) and a temperature control assembly (2), wherein a wiring terminal is provided on the top of the mounting housing (1), the wiring terminal being electrically connected to a mutual inductor assembly (3) inside the mounting housing (1), and the temperature control assembly (2) being used to control the temperature of a working environment inside the mounting housing (1); Its characteristics are: The temperature control assembly (2) includes a temperature control block (21), which is arranged at both sides of the mounting shell (1), and a purification assembly is arranged in a temperature control cavity (22) inside the temperature control block (21) and communicates with the outside world. A cooling fan (221) inside the temperature control cavity (22) draws in external airflow, which is purified by the purification assembly and then sent to the interior of a cooling pipe (11) arranged in the inner wall of the mounting shell (1); The cooling pipes (11) are distributed on the top and side walls of the installation shell (1) and communicate with the internal area of the installation shell (1); an air outlet (12) is provided at the bottom of the installation shell (1), the air outlet (12) communicates with the outside world and conducts away the heat generated by the installation shell (1).

2. The combined mutual inductor according to claim 1, characterized in that: The purification component includes a closing cover (23) slidably arranged at the air inlet (222) on the side wall of the temperature control chamber (22); the closing cover (23) is a square box structure, the interior of which is hollow to form a purification chamber (231); the interior of the purification chamber (231) is filled with a purification filler, and the closing cover (23) is connected to a propulsion device arranged transversely inside the temperature control chamber (22); A limiting net (232) is provided on one side of the opening of the purification chamber (231) close to the interior of the temperature control chamber (22); an air inlet pipe (233) is vertically provided inside the closing cover (23); the top of the air inlet pipe (233) extends to the top of the closing cover (23) and communicates with the outside world; and a vent hole (234) is provided on the side wall of the air inlet pipe (233) and communicates with the clearance area of the purification filler.

3. The combined mutual inductor according to claim 2, characterized in that: The limiting net (232) is elastically connected to the inner wall of the purification chamber (231), and the limiting net (232) is connected to the output end of a mechanical vibration device installed inside the purification chamber (231).

4. The combined mutual inductor according to claim 3, characterized in that: Vibrating rods (235) are evenly arranged on the surface of the limiting net (232). The vibrating rods (235) are elastic rods, and the ends of the vibrating rods (235) are connected to the inner wall of the purification chamber (231) and pass through the purification filler gap area inside the purification chamber (231).

5. The combined mutual inductor according to claim 4, characterized in that: The purification filler includes dry adsorption particles and conductive particles. The dry adsorption particles are made of non-metallic insulating material. The density of the dry adsorption particles is smaller than that of the conductive particles, and the particle size of the dry adsorption particles is larger than that of the conductive particles.

6. The combined mutual inductor according to claim 5, characterized in that: The top of the air inlet pipe (233) is rotatably connected to the inner wall of the purification chamber (231), and the bottom of the air inlet pipe (233) is connected to the output end of the rotating device in the bottom inner wall of the purification chamber (231). The outer surface of the air inlet pipe (233) is evenly provided with spiral flaps (236).

7. The combined mutual inductor according to claim 6, characterized in that: The area near the bottom of the closing cover (23) is the collection area (237), and the area on the closing cover (23) located above the collection area (237) and corresponding to the vent hole (234) is the adsorption area (238); the collection area (237) is made of a metallic conductive material, and the adsorption area (238) is made of a non-metallic insulating material.

8. The combined mutual inductor according to claim 5, characterized in that: The limiting net (232) and the vibration rod (235) are both made of metal conductive material, and the limiting net (232) is connected to the bottom of the temperature control block (21) through a flexible metal wire (25) and is grounded; The surface of the vibration rod (235) is covered with an elastic film (24) with one side being insulated, and the surface of the elastic film (24) is evenly provided with contact grooves (241), and the width of the contact grooves (241) is larger than the particle size of the conductive particles and smaller than the particle size of the dry adsorption particles.

9. A combined mutual inductor detection system, the detection system being used to perform performance detection on the combined mutual inductor according to any one of claims 1 to 8, characterized in that: The combined transformer detection system includes a metering error analysis module, an insulation performance detection module, a temperature rise detection module, and a mechanical performance detection module. The metering error analysis module is used to detect the metering accuracy of the combined transformer when it is connected to the power distribution network. The insulation performance detection module is used to detect the insulation performance of the installation housing (1); The temperature rise detection module is used to simulate the temperature regulation performance of the temperature control component (2) on the internal area of the installation housing (1) under overload conditions; The mechanical property detection module is used to detect the mechanical properties of the corresponding components of the mounting housing (1) and the temperature control block (21), including the ability to resist vibration, impact and corrosion.

10. A combined mutual inductor detection method, wherein the combined mutual inductor detection system according to claim 9 is used, characterized in that: The specific steps of the detection method are: S1, test preparation: check the connection position of the combined transformer to be tested, confirm the wiring is correct, determine the model and voltage level, set the standard source parameters, start the safety protection device, and eliminate interference factors; S2, Error Detection: Move the combined mutual inductor to be tested to the corresponding station of the measurement error analysis module, start the standard source output signal, collect the secondary signal of the combined mutual inductor to be tested, calculate the ratio error and angle error, repeat the process multiple times, take the average value, compare it with the standard value, determine whether it is qualified, and record and store the data; S3, insulation and temperature difference detection: using the insulation performance detection module, conduct insulation resistance and power frequency withstand voltage tests on the test combined mutual inductor to determine whether the insulation performance is qualified; then, at the corresponding station of the temperature rise detection module, monitor the internal working temperature of the installation housing (1) under rated load and overload conditions, thereby determining the operating status of the temperature control component (2); S4, comprehensive evaluation: Summarize the data obtained from each test item and compare it with the qualified standards to determine whether the tested combined transformer is qualified, and generate a test report for archiving.

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