Energy hedging type rapid demagnetization detection device for power transformer

Abstract

The utility model relates to an energy hedging type rapid demagnetization detection device for a power transformer. The energy hedging type rapid demagnetization detection device comprises a case shell, an operation display interaction unit and an internal control system, wherein the operation display interaction unit comprises a working mode selection switch, a degaussing direction selection switch, a power switch, a start button, a scram button, a high-voltage danger indicator lamp, an alarm buzzer, a power input interface, a high-voltage output interface, a USB and network interface, a touch liquid crystal screen and a structural component, namely a mounting panel; the internal control system comprises an energy storage unit, a switching power supply, an energy interaction direction control panel, a main control unit, an intelligent high-voltage regulating unit and structural parts, wherein the structural parts comprise a bottom mounting bracket, a device mounting bracket and a buckling cover part. The intelligent high voltage regulating unit is composed of an electronic voltage regulator and a boosting transformer. The device can quickly and thoroughly eliminate residual magnetism in a large transformer iron core, is compact and reasonable in structural layout, is provided with a pull rod and trundles, and is convenient and labor-saving to use on site.

Description

TECHNICAL FIELD

[0001] The utility model relates to power transformer energy butt -type quick demagnetization detection device. BACKGROUND

[0002] Power transformer is the important component of the composition electric network, plays very key role in the safe operation of electric network. Once the abnormal operation influence scope is extremely big, light causes the equipment damage, heavy major power failure accident occurs.

[0003] Large transformer is tested after overhauling or runs 1-3 years, and the magnetic field of the large current produced when direct current resistance test is carried out will make the transformer core produce a large amount of residual magnetism. The residual magnetism of transformer core will directly affect the normal operation of transformer, and the excitation inrush current phenomenon appears, thereby causing the tripping phenomenon in the process of switching. The excitation inrush current will produce a large amount of harmonics to cause serious pollution to the power quality of electric network, increase the no-load loss of transformer and affect the service life. Therefore, the transformer core must be demagnetized before the transformer is put into operation.

[0004] The existing transformer demagnetization equipment has single function, cannot detect the residual magnetism of transformer after demagnetization is completed, leads to the demagnetization effect cannot be obtained, if misjudgment, will produce great threat to the electric network. Many alternating current demagnetization method equipment is huge, and transportation is inconvenient, which causes the trouble of on-site application. Therefore, it is very necessary to design a new type of demagnetization device which can completely demagnetize, is fast and effective, and is convenient to carry and transport. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the prior art deficiencies, and provides a new type of demagnetization device which can obtain demagnetization effect and is convenient to carry and transport. The device can quickly and completely eliminate the residual magnetism in the large transformer core, has compact and reasonable structure layout, is firm and durable to install, has strong waterproof and shock resistance, is provided with a draw bar and a trundle, is convenient to transport, and is convenient, labor-saving and time-saving to use on site.

[0006] To solve the above problems, the technical scheme adopted by the utility model is:

[0007] A power transformer energy butt -type quick demagnetization detection device, including the machine case shell, the operation display interactive unit is installed on the inner chamber upper portion of the machine case shell, and the internal control system is installed in the machine case shell;

[0008] The operation display interactive unit is electrically connected with the internal control system;

[0009] The internal control system includes an energy storage unit, a switching power supply, a main control unit, an energy interaction direction control board and an intelligent high-voltage regulating unit.

[0010] The switch power supply is electrically connected with the energy interaction direction control board, the main control unit and the intelligent high-voltage regulating unit respectively, and supplies power for each module.

[0011] The main control unit is electrically connected with the energy interaction direction control board and the intelligent high-voltage regulating unit.

[0012] The intelligent high-voltage regulating unit comprises a boost transformer and an electronic voltage regulator which are electrically connected.

[0013] The energy interaction direction control board is electrically connected with the energy storage unit.

[0014] The internal control system is fixed by the bottom mounting bracket, the device mounting bracket and the cover mounting.

[0015] The operation display interaction unit comprises a working mode selection switch, a demagnetization direction selection switch, a power supply switch, a start button, an emergency stop button, a high-voltage danger indicator, an alarm buzzer, a power input interface, a high-voltage output interface, a USB and network interface, a touch liquid crystal screen and a mounting panel.

[0016] The bottom mounting bracket is arranged in the cabinet shell, and the cover and the device mounting bracket are arranged on the bottom mounting bracket.

[0017] The energy storage unit is arranged in the cover and used for storing energy.

[0018] The switch power supply is arranged on the bottom mounting bracket and used for providing electric energy.

[0019] The boost transformer, the switch power supply and the electronic voltage regulator are arranged on the bottom mounting bracket.

[0020] The main control unit is arranged on the device mounting bracket.

[0021] The cabinet shell is made of PP alloy material and is anti-falling, waterproof, dustproof and high and low temperature resistant.

[0022] The cabinet shell is provided with a handle, a pull rod and casters, and is convenient to carry and transport and flexible and convenient to use on site.

[0023] The cabinet shell is provided with a cover, and the cover is provided with a sealing ring.

[0024] The operation display interaction unit is fixed in the cabinet shell through the mounting panel.

[0025] The working mode selection switch, the demagnetization direction selection switch, the power supply switch, the start button, the emergency stop button, the high-voltage danger indicator, the alarm buzzer, the power input interface, the high-voltage output interface, the USB and network interface and the touch liquid crystal screen are arranged on the mounting panel.

[0026] The mounting panel is provided with mounting holes and is fixed on the cabinet shell by screws;

[0027] The mounting panel is provided with air holes for internal ventilation and heat dissipation.

[0028] The bottom mounting bracket is made of hot-dip galvanized sheet and is fixed in the cabinet shell by screws.

[0029] The support frame is made of hot-dip galvanized sheet and is bent into a half-enclosed U-shaped structure, and the energy storage unit, the energy interaction direction control board and the heat dissipation device are placed in the support frame and are integrally packaged by the heat shrink tube from the outside.

[0030] The buckle cover is made of hot-dip galvanized sheet and is bent and processed, and after being assembled with the bottom mounting bracket, an independent cavity is formed, and the energy storage unit, the energy interaction direction control board and the heat dissipation device packaged by the heat shrink tube are placed in the cavity to play a role of isolation and protection.

[0031] The device mounting bracket is made of hot-dip galvanized sheet and is bent and processed, and is provided with a long hole on the side surface for ventilation; the device mounting bracket is provided with a stud on the upper portion for mounting and fixing the main control unit; the device mounting bracket is provided with a lower space on the upper portion for placing the switching power supply and the electronic voltage regulator; and the device mounting bracket is mounted and fixed on the bottom mounting bracket by screws.

[0032] The utility model discloses an operation display interaction unit of intelligence, and the operator can carry out the degaussing operation more quickly and accurately, obtains degaussing effect information, avoids misjudgment. Compact and reasonable structure layout, small size, firm and durable installation have very strong waterproof and dustproof performance, are equipped with draw -in rod and trundle, convenient transportation, on -the -spot use is convenient and laborsaving, satisfies on -the -spot test condition. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is whole structure schematic diagram of the utility model;

[0034] Figure 2 It is internal control system structure schematic diagram of the utility model;

[0035] Figure 3 It is energy storage unit structure schematic diagram of the utility model;

[0036] Figure 4 It is opening structure schematic diagram of the utility model;

[0037] Figure 5 It is circuit schematic diagram of the utility model.

[0038] In the diagram: 1. Chassis; 2. Operation display and interaction unit; 3. Internal control system; 4. Energy storage unit; 5. Step-up transformer; 6. Switching power supply; 7. Electronic voltage regulator; 8. Main control unit; 9. Bottom mounting bracket; 10. Device mounting bracket; 11. Cover; 12. Energy interaction direction control board; 13. Heat dissipation device; 14. Support frame; 15. Intelligent high-voltage regulating unit. Detailed Implementation

[0039] Example 1, such as Figures 1-5 As shown, the power transformer energy counter-current rapid demagnetization detection device of this embodiment includes a chassis shell 1; an operation display interaction unit 2 is installed in the upper part of the inner cavity of the chassis shell 1, and an internal control system 3 is installed in the chassis shell 1, thereby realizing the loading of the detection element.

[0040] Example 2, as a specific illustration, the internal control system 3 includes a bottom mounting bracket 9 and a cover 11 disposed on the bottom mounting bracket 9; an energy storage unit 4 for energy storage is installed in the cover 11;

[0041] A switching power supply 6 for providing electrical power is mounted on the bottom mounting bracket 9;

[0042] The bottom mounting bracket 9 has a device mounting bracket 10;

[0043] The bottom mounting bracket 9 houses the step-up transformer 5, the switching power supply 6, the electronic voltage regulator 7, and the main control unit 9, thus enabling the storage arrangement of the components.

[0044] The chassis shell 1 is made of PP alloy material, which serves as the supporting carrier.

[0045] The chassis shell 1 is equipped with handles, pull rods, and casters; thus enabling drive.

[0046] The chassis housing 1 includes a cover; the cover is equipped with a sealing ring to achieve a seal, making it waterproof and dustproof; mounting holes are provided at the bottom of the chassis housing 1 for mounting the panel and bottom mounting bracket, thereby enabling the installation of components.

[0047] As a specific example, the operation display and interaction unit 2 includes a mounting panel, a touch LCD screen, a high-voltage terminal block, an emergency stop button, a buzzer, a grounding button, a power input interface, a power button, a USB interface, a network port, a start button, and a selection rotary switch.

[0048] To ensure secure mounting, the mounting panel is provided with mounting holes and is fixed to the chassis housing with screws.

[0049] The mounting panel of this utility model is provided with ventilation holes for ventilation and heat dissipation inside the equipment.

[0050] As a specific description, the bottom mounting bracket 9 is made of hot-dip galvanized sheet and is fixed on the cabinet shell 1 by screws.

[0051] In order to improve the capacitor part, the support frame 14 is made of hot-dip galvanized sheet and is bent into a half-enclosed U-shaped structure, the energy storage unit 4, the energy interaction direction control plate 12 and the heat dissipation device 13 are placed in the support frame 14, and the whole is packaged by a heat shrink tube; the half-enclosed U-shaped structure plays a physical protection role and prevents impact and deformation.

[0052] In order to better improve the supporting effect, the buckle cover 11 is made of hot-dip galvanized sheet and is bent and processed, and after being assembled with the bottom mounting bracket 9, an independent cavity is formed, the energy storage unit 4, the energy interaction direction control plate 12 and the heat dissipation device 13 packaged by the heat shrink tube are placed in the cavity as a whole, the independent cavity plays a mounting, fixing, isolating and protecting role, so that they are isolated, and the isolation and explosion-proof functions are realized.

[0053] In order to better improve the supporting effect, the step-up transformer 5 is fixed on the bottom mounting bracket 9 by screws.

[0054] In order to realize support, the device mounting bracket 10 is made of hot-dip galvanized sheet and is bent and processed, a long hole is arranged on the side surface for ventilation, a stud is arranged on the upper portion of the device mounting bracket 10 for mounting and fixing the main control unit 8, a lower space is arranged on the upper portion of the device mounting bracket 10 for placing the switching power supply 6 and the electronic voltage regulator 7, and the device mounting bracket 10 is fixed on the bottom mounting bracket 9 by screws.

[0055] The cabinet cover is connected with the cabinet shell 1 in a buckling mode or a zipper mode.

[0056] As an embodiment, as shown in the accompanying drawings, Figures 1-4 The utility model discloses a large -scale power transformer energy hedging formula fast -mature degaussing detection device, structure is by three parts constitutes, include: cabinet shell 1, operation display interactive unit 2, and internal control system 3. Wherein internal control system 3 includes: energy storage unit 4, step-up transformer 5, switching power supply 6, electronic voltage regulator 7, main control unit 8 and structural member: bottom mounting bracket 9, device mounting bracket 10 and buckle cover 11.

[0057] The cabinet shell 1 is light in weight and high in strength, is waterproof, dustproof, impact-resistant and high and low temperature-resistant, is provided with three handles, a pull rod and casters to realize lifting, carrying and pulling functions and facilitate on-site carrying and transportation. The cabinet cover of the cabinet shell is provided with a high-quality O-shaped sealing ring and is sealed, waterproof and durable. The cabinet shell 1 is provided with mounting holes and can be provided with a panel and a bottom mounting bracket.

[0058] The operation display interaction unit 2 comprises a mounting panel, a touch liquid crystal screen, a high-voltage terminal, an emergency stop button, a buzzer, a grounding knob, a power input interface, a power button, a USB interface, a network port, a start button, a positive and negative selection knob switch, a resistance measurement selection knob switch and a demagnetization selection knob switch. The mounting panel is provided with mounting holes and can be directly mounted and fixed on the cabinet shell 1 by screws; and is provided with ventilation holes for internal ventilation and heat dissipation.

[0059] The internal control system 3 is assembled as a whole, and all components are mounted on the bottom mounting bracket 9 which is made of hot-dipped galvanized sheet and has strong structural load capacity and is not easy to deform and is mounted and fixed on the cabinet shell 1 by screws.

[0060] The support frame 14 is a half-enclosed U-shaped structure made of hot-dipped galvanized sheet, and the energy storage unit 4, the energy interaction direction control board 12 and the heat dissipation device 13 are placed in the support frame 14 and are integrally packaged by a heat shrink tube; the half-enclosed U-shaped structure plays a physical protection role and prevents impact and deformation.

[0061] The buckle cover 11 is made of hot-dipped galvanized sheet and is bent and processed, and forms an independent cavity after being assembled with the bottom mounting bracket 9, and the energy storage unit 4, the energy interaction direction control board 12 and the heat dissipation device 13 packaged by the heat shrink tube are placed in the cavity as a whole, the independent cavity plays a mounting and fixing, isolating and protecting role, so that they are isolated, and the isolation and explosion-proof functions are realized.

[0062] The step-up transformer 5 is mounted and fixed on the bottom mounting bracket 9 by screws.

[0063] The device mounting bracket 10 is made of hot-dipped galvanized sheet and is bent and processed, and is provided with long holes on the side surface for ventilation; the device mounting bracket 10 is provided with studs on the upper portion for mounting and fixing the main control unit 8; the device mounting bracket 10 is provided with a lower space on the upper portion for placing the switching power supply 6 and the electronic voltage regulator 7; and the device mounting bracket 10 is mounted and fixed on the bottom mounting bracket 9 by screws.

[0064] As the circuit description: the circuit comprises two parts of an operation display interaction unit and an internal control system. The operation display interaction unit comprises a working mode selection switch, a demagnetization direction selection switch, a power switch, a start button, an emergency stop button, a high-voltage danger indicator, an alarm buzzer, a power input interface, a high-voltage output interface, a USB and network interface, and a touch liquid crystal screen, and the internal control system comprises a switching power supply, an energy storage unit, an energy interaction direction control board, a main control unit and an intelligent high-voltage voltage regulating unit. The intelligent high-voltage voltage regulating unit is composed of an electronic voltage regulator and a step-up transformer.

[0065] The working mode selection switch, the demagnetization direction selection switch, the start button, the emergency stop button, the high-voltage danger indicator lamp and the alarm buzzer are connected to the control input / output interface of the main control unit of the internal control system through the circuit board and the circuit board connecting cable, the working mode selection switch is used for selecting the residual magnetism measurement mode or the demagnetization mode, the demagnetization direction selection switch is used for selecting the initial output direction of the demagnetization energy, the start button is the demagnetization or measurement start button, the high-voltage danger indicator lamp is used for prompting whether the current high-voltage output interface outputs high voltage, and the alarm buzzer is used for alarming information prompting.

[0066] The power input access switch power supply is used for supplying power to the whole device, the high-voltage output interface is connected to the high-voltage output interface of the main control unit through the high-voltage cable, the high-voltage output interface is connected to the measured equipment, and the high-voltage measurement residual magnetism or the counter energy is output through the interface to demagnetize the measured equipment.

[0067] The USB and network interface and the touch liquid crystal screen are connected to the USB output interface, the network output interface and the liquid crystal output interface of the main control unit through the special cable respectively, the USB interface is used for data export, the network interface is used for remote operation of the equipment and connection between the equipment, the touch liquid crystal screen is a residual magnetism measurement and demagnetization information display window, and is used for displaying all information of the current operation.

[0068] In the internal control system, the switch power supply is the power supply of the whole device, and is connected to the energy interaction direction control board, the main control unit and the intelligent high-voltage regulating unit through the power supply line to supply power to each module.

[0069] The main control unit is the core of the whole device, which adopts the existing main controller of the applicant, receives various command information of the operation display interactive unit, analyzes the parameters collected by the whole system according to the internal preset control logic, and sends a control signal to the intelligent high-voltage regulating unit to control the intelligent high-voltage regulating unit to output the preset voltage. The intelligent regulating unit controls the electronic voltage regulator to output the voltage of the corresponding frequency and amplitude through the voltage and frequency regulating signal output by the main control unit, and amplifies the output voltage, and outputs to the step-up transformer to pre-charge the energy storage unit. The energy interaction direction control board monitors the energy in the energy storage unit, and sends a command to the main control unit when the preset energy is reached. The main control unit sends a stop command to the intelligent high-voltage regulating unit, and sends a demagnetization start command to the energy interaction direction control board. The energy interaction direction control board controls the energy output direction of the energy storage unit through the preset demagnetization direction, and automatically changes the energy direction by detecting the relationship between the energy output voltage and current, so as to realize the free decay oscillation of the demagnetization output energy in the energy storage unit and the measured equipment, and achieve the purpose of rapid demagnetization. At the same time, the main control unit calculates the residual magnetism and demagnetization effect evaluation according to the collected voltage and current information.

[0070] The energy storage unit is a capacitor pack composed of high-voltage capacitors, used for storing energy.

[0071] The energy interaction direction control board controls the energy interaction direction through the signals collected from the energy storage unit and the main control unit, so as to achieve the purpose of rapid demagnetization.

[0072] The utility model fully describes is in order to more clearly disclose, and for prior art is no longer enumerated one by one.

[0073] Finally, it should be pointed out that: the above examples are only used to illustrate the technical scheme of the utility model, and are not limited thereto; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing examples, or make equivalent replacement to part of the technical features; as it is obvious for those skilled in the art to combine the plurality of technical schemes of the utility model. And these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the utility model embodiments.

Claims

1. A power transformer energy-balance type fast demagnetization detection device, characterized by: The application relates to a high-voltage energy storage and measurement device, which comprises a cabinet shell (1), an operation display interaction unit (2) installed on the upper cavity of the cabinet shell (1), and an internal control system (3) installed in the cabinet shell (1). The operation display interaction unit (2) is electrically connected with the internal control system (3). The internal control system (3) comprises an energy storage unit (4), a switching power supply (6), a main control unit (8), an energy interaction direction control board (12) and a smart high-voltage regulating unit (15). The switching power supply (6) is electrically connected with the energy interaction direction control board (12), the main control unit (8) and the smart high-voltage regulating unit (15) respectively, and provides power supply for the modules. The main control unit (8) is electrically connected with the energy interaction direction control board (12) and the smart high-voltage regulating unit (15). The smart high-voltage regulating unit (15) comprises a boost transformer (5) and an electronic voltage regulator (7) which are electrically connected. The energy interaction direction control board (12) is electrically connected with the energy storage unit (4). The internal control system (3) is installed and fixed through a bottom mounting bracket (9), a device mounting bracket (10) and a cover piece (11). The operation display interaction unit (2) comprises a working mode selection switch, a demagnetization direction selection switch, a power supply switch, a start button, an emergency stop button, a high-voltage danger indicator, an alarm buzzer, a power input interface, a high-voltage output interface, a USB and network interface, a touch liquid crystal screen and a structure piece, i.e. a mounting panel.

2. The power transformer energy-balance fast-de-excitation detection device according to claim 1, characterized in that: The bottom mounting bracket (9) is arranged in the cabinet shell (1); the cover piece (11) and the device mounting bracket (10) are arranged on the bottom mounting bracket (9). The energy storage unit (4) is arranged in the cover piece (11) and is used for storing energy. The switching power supply (6) is arranged on the bottom mounting bracket (9) and is used for providing electric energy. The boost transformer (5), the switching power supply (6) and the electronic voltage regulator (7) are arranged on the bottom mounting bracket (9). The main control unit (8) is arranged on the device mounting bracket (10).

3. The power transformer energy-balance fast-de-excitation detection device according to claim 2, characterized in that: The cabinet shell (1) is made of PP alloy material. The cabinet shell (1) is provided with a handle, a pull rod and casters. The cabinet shell (1) is provided with a cabinet cover which is provided with a sealing ring; mounting holes are arranged in the cabinet shell (1) and are used for mounting the mounting panel and the bottom mounting bracket (9).

4. The power transformer energy-balance fast-de-excitation detection device of claim 3, wherein: The operation display interaction unit (2) is fixed in the cabinet shell (1) through the mounting panel. The working mode selection switch, the demagnetization direction selection switch, the power supply switch, the start button, the emergency stop button, the high-voltage danger indicator, the alarm buzzer, the power input interface, the high-voltage output interface, the USB and network interface and the touch liquid crystal screen are mounted on the mounting panel. Mounting holes are arranged in the mounting panel and are used for mounting and fixing the cabinet shell (1) through screws. Ventilation holes are arranged in the mounting panel and are used for ventilation and heat dissipation of the equipment.

5. The power transformer energy-balance fast-de-excitation detection device of claim 4, wherein: In the operation display interaction unit (2), the working mode selection switch, the demagnetization direction selection switch, the start button, the emergency stop button, the high-voltage danger indicator and the alarm buzzer are electrically connected to the control input and output interface of the main control unit (8) through a circuit board and a circuit board connecting flat cable. The working mode selection switch is used for selecting a residual magnetic field measurement mode or a demagnetization mode. ​ Demagnetization direction selection switch, used to select the initial output direction of demagnetization energy; Start button is demagnetization or measurement start button; High voltage danger indicator, used to prompt whether the current high voltage output interface outputs high voltage, and to warn to prevent danger; Alarm buzzer, used to prompt alarm information, which is displayed through touch liquid crystal screen; Power input interface accesses switching power supply (6) to power the entire device; High voltage output interface is electrically connected to internal main control unit (8) through high voltage cable, and is externally connected to the measured equipment; USB and network interface, touch liquid crystal screen are electrically connected to main control unit (8).

6. The power transformer energy-balance fast-de-excitation detection device of claim 5, wherein: Support frame (14) is made of hot-dipped galvanized sheet and is bent into a half-enclosed U-shaped structure. Energy storage unit (4), energy interaction direction control board (12) and heat dissipation device (13) are placed in support frame (14), and the whole is packaged by heat shrink tube.

7. The power transformer energy-balance fast-de-excitation detection device of claim 6, wherein: Cover piece (11) is made of hot-dipped galvanized sheet and is bent and processed. After being assembled with bottom mounting bracket (9), it forms an independent cavity. Energy storage unit (4), energy interaction direction control board (12) and heat dissipation device (13) packaged by heat shrink tube are placed in the cavity, which plays an isolating and protecting role.

8. The power transformer energy-balance fast-de-excitation detection device of claim 7, wherein: Device mounting bracket (10) is made of hot-dipped galvanized sheet and is bent and processed. Long holes are provided on the side surface for ventilation. Threaded studs are provided on the upper part of device mounting bracket (10) for mounting and fixing main control unit (8). Lower space is provided on the upper part of device mounting bracket (10) for placing switching power supply (6) and electronic voltage regulator (7). Device mounting bracket (10) is mounted and fixed on bottom mounting bracket (9) by screws.

9. The power transformer energy-balance fast-de-excitation detection device of claim 8, wherein: Bottom mounting bracket (9) is made of hot-dipped galvanized sheet and is mounted and fixed in case shell (1) by screws.

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