CN213957590U - Transformer internal winding deformation tester - Google Patents
Transformer internal winding deformation tester Download PDFInfo
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- CN213957590U CN213957590U CN202023172637.9U CN202023172637U CN213957590U CN 213957590 U CN213957590 U CN 213957590U CN 202023172637 U CN202023172637 U CN 202023172637U CN 213957590 U CN213957590 U CN 213957590U
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Abstract
The transformer internal winding deformation tester comprises a shell, wherein an impedance connecting terminal and a frequency response connecting terminal are arranged on the shell, the impedance connecting terminal is used for being electrically connected with a transformer to be tested so as to measure impedance variation, and the frequency response connecting terminal is used for being electrically connected with the transformer to be tested so as to measure frequency response variation; the impedance connecting terminal comprises an A-phase current terminal, an A-phase voltage terminal, a B-phase current terminal, a B-phase voltage terminal, a C-phase current terminal and a C-phase voltage terminal which are correspondingly arranged, and the frequency response connecting terminal comprises an excitation terminal, a reference terminal and a response terminal which are matched with each other; the USB interface is used for communication between a computer and an instrument, and the wireless interface is connected with a wireless transceiver; and a controller is arranged in the shell, and the measurement and detection of the transformer are carried out based on the impedance connecting terminal and the frequency response connecting terminal which are arranged on the shell and combined with the data processing function of the controller and the computer.
Description
The technical field is as follows:
the utility model relates to a transformer internal winding warp tester.
Background art:
the transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction, main components are a primary coil, a secondary coil and an iron core, and the transformer has the following main functions: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization, and the like; in electrical equipment and wireless circuits, the high-voltage power supply is often used for voltage rise and fall, impedance matching, safety isolation and the like. In a generator, an electrical potential can be induced in a coil, whether the coil is moved through a magnetic field or a magnetic field is moved through a stationary coil. In both cases, the value of the magnetic flux is constant, but the amount of the magnetic flux linked with the coil varies, which is the principle of mutual induction. A transformer is a device for transforming voltage, current and impedance by using mutual electromagnetic induction.
Transformers can be divided into: distribution transformers, power transformers, fully enclosed transformers, combined transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type transformer test transformers, corner transformers, high current transformers, excitation transformers, etc.
In order to ensure the normal operation and use of the transformer, the change of the internal winding of the transformer needs to be measured to judge the use state of the transformer; generally, the internal winding and the use state of the transformer are reflected by measuring the impedance change value of the transformer, but because the impedance change value is influenced by more factors, a larger error can be generated in the measuring process, and the accuracy is poorer; in addition, the existing transformer internal winding deformation tester has the disadvantages of low response speed, long measurement period and low working efficiency.
The utility model has the following contents:
the embodiment of the utility model provides a transformer inner winding warp tester, structural design is reasonable, based on the impedance connecting terminal and the frequency response connecting terminal that set up on the casing and combine the data processing function of controller and computer, adopt two kinds of measuring parameter of impedance variation and frequency response variation to react the degree of change of transformer inner winding to judge the user state of transformer, avoid appearing great error, response speed is fast, work efficiency is high, the problem that exists among the prior art has been solved.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
the transformer internal winding deformation tester comprises a shell, wherein an impedance connecting terminal and a frequency response connecting terminal are arranged on the shell, the impedance connecting terminal is used for being electrically connected with a transformer to be tested so as to measure impedance variation, and the frequency response connecting terminal is used for being electrically connected with the transformer to be tested so as to measure frequency response variation; the impedance connecting terminal comprises an A-phase current terminal, an A-phase voltage terminal, a B-phase current terminal, a B-phase voltage terminal, a C-phase current terminal and a C-phase voltage terminal which are correspondingly arranged, and the frequency response connecting terminal comprises an excitation terminal, a reference terminal and a response terminal which are matched with each other; the USB interface is used for communication between a computer and an instrument, and the wireless interface is connected with a wireless transceiver; the controller is arranged in the shell, the model of the controller is STM32F072C, 48 pins are arranged on the controller, a crystal oscillator is connected in parallel to a pin III and a pin IV of the controller, a second capacitor and a third capacitor are connected in parallel to the crystal oscillator, and a pin VII of the controller is grounded through a first capacitor; a twelve-number pin of the controller is connected with a timer, and the timer is used for recording a measured time node; the controller is connected with the impedance connecting terminal through a twenty-five pin, and the controller is connected with the frequency response connecting terminal through a twenty-six pin; the controller is connected with the wireless transceiver through a twenty-ninth pin and a thirty-first pin, and the wireless transceiver is used for the controller to establish wireless communication with the upper computer.
And the impedance connecting terminal and the frequency connecting terminal are respectively provided with a measuring cable, a measuring clamp and a grounding wire.
And a power supply interface is also arranged on the shell and comprises an AC220V interface, an external input interface and a power switch.
The type of the timer is 555 timers, 8 pins are arranged on the 555 timers, and the pin III of the 555 timers is connected with the pin twelve of the controller.
The model of the wireless transceiver is ESP8266, 8 pins are arranged on the wireless transceiver, a fourth pin of the wireless transceiver is connected with a twenty-ninth pin of the controller, and an eighth pin of the wireless transceiver is connected with a thirty-first pin of the controller.
The impedance connection terminal further includes a switch to switch between an internal power supply and an external power supply.
The utility model adopts the above structure, through the frequency response connecting terminal with the electrical connection of the transformer to be measured in order to measure the frequency response variable quantity, the frequency response connecting terminal includes the excitation terminal, the reference terminal and the response terminal that cooperate to set up, can adjust and change the detection connection mode according to the measurement requirement in order to accurately detect and judge the service condition of the transformer to be measured; the impedance connecting terminal is electrically connected with the transformer to be detected to measure the impedance variable quantity, and comprises an A-phase current terminal, an A-phase voltage terminal, a B-phase current terminal, a B-phase voltage terminal, a C-phase current terminal and a C-phase voltage terminal which are correspondingly arranged; the corresponding time node is detected and measured through the timer, so that the work personnel can conveniently inquire historical data; the notebook computer and the tester are in wireless communication through the USB interface, so that the tester is controlled by the computer to perform measurement and detection; the wireless transceiver establishes wireless communication between the tester and the upper computer, so that data can be conveniently checked and reviewed, and the device has the advantages of time saving, high efficiency, accuracy and practicability.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the connection terminal of the present invention.
Fig. 3 is a schematic diagram of the connection of the impedance connection terminal of the present invention.
Fig. 4 is an electrical schematic diagram of the controller of the present invention.
Fig. 5 is an electrical schematic diagram of the timer of the present invention.
Fig. 6 is an electrical schematic diagram of the wireless transceiver of the present invention.
The specific implementation mode is as follows:
in order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
As shown in fig. 1 to 6, the transformer internal winding deformation tester includes a housing, an impedance connection terminal and a frequency response connection terminal on the housing, the impedance connection terminal being used for being electrically connected with a transformer to be tested to measure an impedance variation, the frequency response connection terminal being used for being electrically connected with the transformer to be tested to measure a frequency response variation; the impedance connecting terminal comprises an A-phase current terminal, an A-phase voltage terminal, a B-phase current terminal, a B-phase voltage terminal, a C-phase current terminal and a C-phase voltage terminal which are correspondingly arranged, and the frequency response connecting terminal comprises an excitation terminal, a reference terminal and a response terminal which are matched with each other; the USB interface is used for communication between a computer and an instrument, and the wireless interface is connected with a wireless transceiver; the controller is arranged in the shell, the model of the controller is STM32F072C, 48 pins are arranged on the controller, a crystal oscillator is connected in parallel to a pin III and a pin IV of the controller, a second capacitor and a third capacitor are connected in parallel to the crystal oscillator, and a pin VII of the controller is grounded through a first capacitor; a twelve-number pin of the controller is connected with a timer, and the timer is used for recording a measured time node; the controller is connected with the impedance connecting terminal through a twenty-five pin, and the controller is connected with the frequency response connecting terminal through a twenty-six pin; the controller is connected with the wireless transceiver through a twenty-ninth pin and a thirty-first pin, and the wireless transceiver is used for the controller to establish wireless communication with the upper computer.
And the impedance connecting terminal and the frequency connecting terminal are respectively provided with a measuring cable, a measuring clamp and a grounding wire.
And a power supply interface is also arranged on the shell and comprises an AC220V interface, an external input interface and a power switch.
The type of the timer is 555 timers, 8 pins are arranged on the 555 timers, and the pin III of the 555 timers is connected with the pin twelve of the controller.
The model of the wireless transceiver is ESP8266, 8 pins are arranged on the wireless transceiver, a fourth pin of the wireless transceiver is connected with a twenty-ninth pin of the controller, and an eighth pin of the wireless transceiver is connected with a thirty-first pin of the controller.
The impedance connection terminal further includes a switch to switch between an internal power supply and an external power supply.
The embodiment of the utility model provides an in the inside winding of transformer warp the theory of operation of tester do: based on the impedance connecting terminal and the frequency response connecting terminal which are arranged on the shell and combined with the data processing function of the controller and the computer, two measurement parameters of impedance variation and frequency response variation are adopted to reflect the variation degree of the inner winding of the transformer so as to judge the use state of the transformer, thereby avoiding the occurrence of larger error, having high response speed and high work efficiency, and being applicable to transformers of various different types.
As for the connection mode of the frequency response connection terminal, as shown in fig. 2, the connection mode can be mainly divided into 4 modes, which can be selected according to the measurement scene and the actual measurement requirement, and in the measurement process, the measurement cable, the measurement clamp and the ground wire are often set in a matching manner for use.
In the process of measuring through the frequency response connecting terminal, the method is divided into two modes of linear scanning distribution and segmented frequency sweeping measurement distribution, so that the amplitude measurement range is obtained; the linear scanning distribution sweep frequency measurement range is (10Hz) - (10MHz)40000 sweep frequency points, and the segmented sweep frequency measurement distribution sweep frequency measurement range is (0.5kHz) - (1MHz)2000 sweep frequency points; particularly, the amplitude measurement precision is 0.1dB, and the scanning frequency precision is 0.005%, so that the accuracy and reliability of the measurement and detection result are ensured.
The connection mode of the impedance connection terminal mainly includes Yn connection, Y connection and III connection, taking Yn connection as an example, as shown in fig. 3, firstly, all low-voltage side three phases are short-circuited by using a short-circuit clamp, then, high-voltage side or medium-voltage side is connected by using a measurement clamp according to the content of current measurement according to ABC three phases corresponding to yellow, green and red, black lines are connected to O points, eight ports on the side of the measurement unit are connected, and also according to ABCO three phases corresponding to yellow, green, red and black, a plug of a slightly thick connection line is inserted into a current port corresponding to the lower side, and a plug of a slightly thin connection line is inserted into a voltage port corresponding to the upper side.
In the process of measuring through the impedance connecting terminal, the measurement precision is 0.2 level of current and 0.2 level of voltage; the impedance measurement range is 0-100%; the voltage measurement range is: AC 5V-500V, and the current measuring range is AC0.1A-10A.
Still be equipped with power source on the casing, power source includes AC220V interface, external input interface and switch, switches on the power in order to supply power for the controller, and the power supply is stable to make controller control stable, the testing result is accurate.
The controller is connected with a computer through a USB interface and is used for detecting through the running of the computer; establish wireless communication with controller and host computer through wireless transceiver to the host computer of staff is given with measurement and detection result transmission, under general condition, the host computer mainly includes cell-phone, panel computer etc..
To sum up, the embodiment of the utility model provides an in the transformer internal winding deformation tester adopt two kinds of measurement parameters of impedance variation and frequency response variation to react the degree of change of transformer internal winding based on the impedance connecting terminal and the frequency response connecting terminal of setting on the casing and combine the data processing function of controller and computer to judge the user state of transformer, avoid appearing great error, response speed is fast, work efficiency is high, can be applicable to the transformer of multiple different grade type, thereby guarantee to feed back to the reliable accurate of the internal winding and the service conditions of staff's transformer.
The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Claims (6)
1. Transformer internal winding warp tester, its characterized in that: the frequency response testing device comprises a shell, an impedance connecting terminal and a frequency response connecting terminal, wherein the impedance connecting terminal and the frequency response connecting terminal are arranged on the shell, the impedance connecting terminal is used for being electrically connected with a transformer to be tested so as to measure impedance variation, and the frequency response connecting terminal is used for being electrically connected with the transformer to be tested so as to measure frequency response variation; the impedance connecting terminal comprises an A-phase current terminal, an A-phase voltage terminal, a B-phase current terminal, a B-phase voltage terminal, a C-phase current terminal and a C-phase voltage terminal which are correspondingly arranged, and the frequency response connecting terminal comprises an excitation terminal, a reference terminal and a response terminal which are matched with each other; the USB interface is used for communication between a computer and an instrument, and the wireless interface is connected with a wireless transceiver; the controller is arranged in the shell, the model of the controller is STM32F072C, 48 pins are arranged on the controller, a crystal oscillator is connected in parallel to a pin III and a pin IV of the controller, a second capacitor and a third capacitor are connected in parallel to the crystal oscillator, and a pin VII of the controller is grounded through a first capacitor; a twelve-number pin of the controller is connected with a timer, and the timer is used for recording a measured time node; the controller is connected with the impedance connecting terminal through a twenty-five pin, and the controller is connected with the frequency response connecting terminal through a twenty-six pin; the controller is connected with the wireless transceiver through a twenty-ninth pin and a thirty-first pin, and the wireless transceiver is used for the controller to establish wireless communication with the upper computer.
2. The transformer internal winding deformation tester of claim 1, wherein: and the impedance connecting terminal and the frequency connecting terminal are respectively provided with a measuring cable, a measuring clamp and a grounding wire.
3. The transformer internal winding deformation tester of claim 1, wherein: and a power supply interface is also arranged on the shell and comprises an AC220V interface, an external input interface and a power switch.
4. The transformer internal winding deformation tester of claim 1, wherein: the type of the timer is 555 timers, 8 pins are arranged on the 555 timers, and the pin III of the 555 timers is connected with the pin twelve of the controller.
5. The transformer internal winding deformation tester of claim 1, wherein: the model of the wireless transceiver is ESP8266, 8 pins are arranged on the wireless transceiver, a fourth pin of the wireless transceiver is connected with a twenty-ninth pin of the controller, and an eighth pin of the wireless transceiver is connected with a thirty-first pin of the controller.
6. The transformer internal winding deformation tester of claim 1, wherein: the impedance connection terminal further includes a switch to switch between an internal power supply and an external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023172637.9U CN213957590U (en) | 2020-12-24 | 2020-12-24 | Transformer internal winding deformation tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023172637.9U CN213957590U (en) | 2020-12-24 | 2020-12-24 | Transformer internal winding deformation tester |
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| Publication Number | Publication Date |
|---|---|
| CN213957590U true CN213957590U (en) | 2021-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023172637.9U Active CN213957590U (en) | 2020-12-24 | 2020-12-24 | Transformer internal winding deformation tester |
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|---|---|
| CN (1) | CN213957590U (en) |
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2020
- 2020-12-24 CN CN202023172637.9U patent/CN213957590U/en active Active
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Address after: 250000 room 1901, building 1, Lianhe Fortune Plaza, No. 2177, Tianchen Road, high tech Zone, Jinan, Shandong Province Patentee after: Shandong shankai Electric Power Co.,Ltd. Address before: 250000 room 1901, building 1, Lianhe Fortune Plaza, No. 2177, Tianchen Road, high tech Zone, Jinan, Shandong Province Patentee before: JINAN SUN-K ELECTRIC POWER EQUIPMENT Co.,Ltd. |