Voltage transformer protection device with positioning structure

Abstract

The invention relates to a voltage transformer protection device with a positioning structure, which comprises a box body, an equipment environment protection mechanism and an electrical output protection mechanism, and is characterized in that the equipment environment protection mechanism comprises an L-shaped rack, a fan, a heating net, an insulating protection plate and a temperature and humidity sensor; the electrical output protection mechanism comprises an output interface, a power supply interface, a touch screen and a main case, a main control board is arranged in the main case, and a microprocessor, a positioning module, a fan driving circuit module, a temperature controller module, a current sampling module, a line switching module, a fault judgment module and a wireless data transmission module are integrated on the main control board. According to the voltage transformer protection device with the positioning structure, rapid positioning of a fault position is realized, temperature and humidity monitoring and adjustment can be carried out on an environment where a main body of the voltage transformer is located, overload circuit break protection can be carried out on secondary output, and subsequent fault judgment, alarm, fault data field display and remote transmission can be carried out.

Description

Technical Field

[0001] The present invention relates to the field of power transmission equipment and technology, and in particular to a voltage transformer protection device with a positioning structure. Background Art

[0002] A voltage transformer is a device that converts the primary high voltage of the power transmission system into a lower secondary voltage according to a certain transformation ratio. It is generally installed outdoors in an uncontrollable working environment. Its secondary output terminal is used to connect meters to measure bus voltage, power and other parameters. Once a fault occurs, it will seriously affect the safe and stable operation of the power system and cause hidden dangers of power transmission accidents. The existing voltage transformer protection method generally uses air switches or fuses for overcurrent protection. The protection device does not have the function of equipment positioning and the operating environment is also harsh. It is not only not conducive to monitoring and maintenance personnel to discover faults in time and deal with them on site, but also loses the continuous monitoring signal collection and fault judgment functions during the processing process, making it difficult to quickly feedback the processing effect. Summary of the invention

[0003] The technical problem to be solved by the present invention is: to overcome the defects of the existing voltage transformer, such as the simple circuit breaker or fuse protection mode, the lack of fault location function, and the lack of working environment adjustment and output fault analysis protection, and to provide a voltage transformer protection device with a positioning structure, which realizes the rapid positioning of the fault position, and can monitor and adjust the temperature and humidity of the environment where the main body of the voltage transformer is located, can perform overload circuit breaker protection on the secondary output and perform subsequent fault judgment, alarm, and on-site display and remote transmission of fault data, and on the basis of physical protection of the voltage transformer and the power transmission system in which it is located, provides sufficient information basis for fault handling.

[0004] The voltage transformer protection device with a positioning structure includes a box for containing the voltage transformer, an equipment environment protection mechanism and an electrical output protection mechanism arranged in the box, wherein the equipment environment protection mechanism includes an L-shaped frame arranged in the box facing the side of the voltage transformer output interface, a fan, a heating net and an insulating protective plate arranged on the vertical surface of the L-shaped frame, and a temperature and humidity sensor arranged on the plane of the L-shaped frame; the electrical output protection mechanism includes an output interface and a power supply interface arranged on the front of the box, a touch screen arranged on the front of the box, and a main housing arranged inside the box, wherein a main control board is arranged in the main housing, and a microprocessor, a positioning module, and a fan drive circuit are integrated on the main control board. Module, temperature controller module, current sampling module, line switching module, fault judgment module, wireless data transmission module; the secondary output end of the voltage transformer is connected to the output interface via the current sampling module and the normally closed end of the line switching module, the temperature and humidity sensor is connected to an input end of the microprocessor, the corresponding two output ends of the microprocessor are respectively connected to the fan and the heating network via the fan drive circuit module and the temperature controller module, the current sampling module is connected to an input end of the microprocessor, the normally open end of the fault judgment module is connected to an input end of the microprocessor via the fault judgment module, the corresponding output end of the microprocessor is connected to the coil end of the line switching module, and the touch screen, positioning module, and wireless data transmission module are serially connected to the microprocessor.

[0005] Furthermore, a power converter is also provided in the box, and the power supply interface is connected to the microprocessor, positioning module, fan drive circuit module, temperature controller module, wireless data transmission module and touch screen on the main control board through the power converter.

[0006] Optimally, the box body is tilted inwardly at a side away from the equipment environmental protection mechanism, and an exhaust grille is provided on the tilted surface, and a shielding strip tilted downward is provided at the upper edge of each opening of the exhaust grille.

[0007] Specifically, the insulating protective plate is a PEEK polytetrafluoroethylene plate with ventilation holes.

[0008] Specifically, the microprocessor adopts the minimum system circuit of the STM32F103 single-chip microcomputer.

[0009] Specifically, the positioning module adopts ATGM336H dual-mode positioning module.

[0010] Specifically, the line switching module adopts a G9KA power relay.

[0011] Specifically, the fault judgment module includes a current limiting resistor, a voltage bias chip and a pair of collection resistors. The normally closed end of the line switching module is connected to the front stage of the current limiting resistor, and the two collection resistors are respectively connected to the rear stage of the current limiting resistor. The voltage bias chip is connected to one collection resistor through a diode, and the other collection resistor is grounded.

[0012] The voltage transformer protection device with a positioning structure of the present invention overcomes the defects of the existing voltage transformer, such as simple open or fuse protection mode, lack of fault positioning function, and lack of working environment adjustment and output fault analysis protection, and has the following beneficial effects:

[0013] Realizes rapid location of faults;

[0014] At the same time, it can monitor and adjust the temperature and humidity of the environment where the voltage transformer is located;

[0015] It can provide overload circuit breaker protection for the secondary output and make subsequent fault judgment, alarm, and on-site display and remote transmission of fault data;

[0016] On the basis of physical protection of voltage transformers and the transmission system in which they are located, sufficient information basis is provided for fault handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a further description of a voltage transformer protection device with a positioning structure of the present invention in conjunction with the accompanying drawings:

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the voltage transformer protection device with a positioning structure;

[0019] Figure 2 yes Figure 1 Schematic diagram of the plane structure;

[0020] Figure 3 yes Figure 2 Side view of

[0021] Figure 4 yes Figure 3 AA partial cross-sectional view;

[0022] Figure 5 It is a wireframe diagram of the logical structure and connection relationship of the electrical output protection mechanism of the voltage transformer protection device with a positioning structure.

[0023] In the figure:

[0024] 0-voltage transformer;

[0025] 1-box body; 11-exhaust grille, 12-protective strip.

[0026] 2- equipment environmental protection mechanism; 21- L-type rack, 22- fan, 23- heating net, 24- insulation guard plate, 25- temperature and humidity sensor.

[0027] 3-electrical output protection mechanism; 31-output interface, 32-power supply interface, 33-touch screen, 34-main housing, 30-main control board; 301-microprocessor, 302-positioning module, 303-fan drive circuit module, 304-temperature controller module, 305-current sampling module, 306-line switching module, 307-fault judgment module, 308-wireless data transmission module.

[0028] 4- Power converter. DETAILED DESCRIPTION

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] The technical solution of the present invention is further described below with specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0032] Implementation method 1: Figures 1 to 5As shown, the voltage transformer protection device with a positioning structure includes a box 1 for containing a voltage transformer 0, an equipment environment protection mechanism 2 and an electrical output protection mechanism 3 arranged in the box 1, wherein the equipment environment protection mechanism 2 includes an L-shaped frame 21 arranged in the box facing the side of the output interface of the voltage transformer 0, a fan 22, a heating net 23 and an insulating protective plate 24 arranged on the vertical surface of the L-shaped frame 21, and a temperature and humidity sensor 25 arranged on the plane of the L-shaped frame 21; the electrical output protection mechanism 3 includes an output interface 31 and a power supply interface 32 arranged on the front of the box 1, a touch screen 33 arranged on the front of the box 1, and a main housing 34 arranged inside the box, wherein a main control board 30 is arranged in the main housing 34, and a microprocessor 301, a positioning module 302, a fan drive circuit module 303, and a thermostat module 30 are integrated on the main control board 30. 4. Current sampling module 305, line switching module 306, fault judgment module 307, wireless data transmission module 308; the secondary output end of the voltage transformer 0 is connected to the output interface 31 via the current sampling module 303 and the normally closed end of the line switching module 306, the temperature and humidity sensor 25 is connected to an input end of the microprocessor 301, and the corresponding two output ends of the microprocessor 31 are respectively connected to the fan 22 and the heating network 23 via the fan driving circuit module 303 and the temperature controller module 304, the current sampling module 303 is connected to an input end of the microprocessor 301, the normally open end of the fault judgment module 307 is connected to an input end of the microprocessor 301 via the fault judgment module 307, the corresponding output end of the microprocessor is connected to the coil end of the line switching module 306, and the touch screen 33, the positioning module 302, and the wireless data transmission module 308 are serially connected to the microprocessor 301.

[0033] Implementation method 2: Figure 5 As shown, the box 1 of the voltage transformer protection device with a positioning structure is also provided with a power converter 4, and the power supply interface 32 is respectively connected to the microprocessor 301, the positioning module 302, the fan drive circuit module 303, the temperature controller module 304, the wireless data transmission module 308 and the touch screen 33 on the main control board 30 through the power converter 4. The power converter directly converts the external power supply or the upstream power supply of the secondary input end of the voltage transformer into a low voltage to supply the working voltage for each functional module. The remaining structures and components are as described in Implementation 1 and will not be described again.

[0034] Implementation method 3: Figure 4As shown, the box 1 of the voltage transformer protection device with a positioning structure is tilted inward on the side away from the equipment environmental protection mechanism 2, and an exhaust grille 11 is provided on the inclined surface. The upper edge of each opening of the exhaust grille 11 is provided with a downwardly tilted shielding strip 12. It is used to prevent rainwater from directly invading the box. The insulating protective plate 24 is provided with a PEEK polytetrafluoroethylene plate with ventilation holes. It has good insulation and high temperature resistance, and as a high-density organic material, it is not easy to deform. The remaining structures and components are as described in Implementation 1 and will not be repeated.

[0035] Implementation 4: Figure 5 As shown, the microprocessor 301 of the voltage transformer protection device with positioning structure adopts the minimum system circuit of STM32F103 single-chip microcomputer. It includes single-chip microcomputer chip, crystal oscillator circuit, reset circuit, wherein STM32F103 has the advantages of stable performance, low cost and power consumption, rich serial and ADC interfaces, and integrated internal storage with large space. The positioning module 302 adopts ATGM336H dual-mode positioning module. Under the premise of independent power supply, the equipment can determine the position of the voltage transformer connected to it through the GPS / BDS two positioning systems, and realize rapid fault location and on-site maintenance. The line switching module 306 adopts G9KA power relay. It can operate stably under overcurrent conditions and switch quickly according to microprocessor signals. The fault judgment module 307 includes a current limiting resistor, a voltage bias chip and a pair of acquisition resistors. The normally closed end of the line switching module 306 is connected to the front stage of the current limiting resistor, and the two acquisition resistors are respectively connected to the rear stage of the current limiting resistor. The voltage bias chip is connected to a collection resistor after a diode, and the other collection resistor is grounded. The voltage bias chip provides a bias voltage, which is compared with the voltage at the secondary end of the voltage transformer and input into the microprocessor to determine the fault type. The remaining structures and components are as described in Implementation 1 and will not be described again.

[0036] When in use: connect the secondary circuit breaker of the voltage transformer to the input terminal of the main control board in the main housing of the electrical output protection mechanism in the box, and the secondary output voltage will be output from the output interface after passing through the normally closed terminal of the line switching module.

[0037] During operation: the temperature and humidity sensors monitor the temperature and humidity in the box in real time and send signals to the microprocessor. When the temperature and humidity exceed the preset thresholds, the microprocessor controls the fan, heating network, fan and heating plate to be powered on through the fan drive circuit module and the thermostat module to perform air cooling or dehumidification. Hot air dehumidification has a higher priority than cooling. After the humidity reaches the standard, the heating network is turned off to continue cooling. At the same time, the current sampling module collects the current signal in real time and sends it to the microprocessor. When the current signal exceeds the preset threshold and generates overcurrent, the microprocessor controls the relay of the circuit switching module to disconnect the normally closed circuit and conduct the normally open circuit. The fault judgment module forms a fault. In the circuit, D1006 or other types of voltage bias chips are used to analyze the fault through the current limiting resistor, and the results are sent to the microprocessor. The microprocessor displays the fault type through the touch screen and communicates with the remote monitoring host computer through the wireless data transmission module. Since another circuit is formed, the current sampling module can continuously collect the detection current for fault judgment under short-circuit protection. Under normal working conditions, the touch screen is used for daily secondary terminal voltage and current signal display, while adjusting the threshold, setting parameters and switching the display content, and issuing audio alarms and displaying the fault type when a fault occurs.

[0038] The voltage transformer protection device with a positioning structure overcomes the defects of the existing voltage transformer, such as the simple circuit breaker or fuse protection mode, the lack of fault positioning function, and the lack of working environment adjustment and output fault analysis protection. It realizes the rapid positioning of the fault position, and can monitor and adjust the temperature and humidity of the environment where the main body of the voltage transformer is located, and can perform overload circuit breaker protection on the secondary output and perform subsequent fault judgment, alarm, and on-site display and remote transmission of fault data. On the basis of physical protection of the voltage transformer and the power transmission system in which it is located, it provides sufficient information basis for fault handling.

[0039] The above description shows the main features, basic principles, and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments or embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, the above embodiments or embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A voltage transformer protection device with a positioning structure, characterized in that: It comprises a box (1) for containing a voltage transformer (0), an equipment environment protection mechanism (2) and an electrical output protection mechanism (3) arranged in the box (1), wherein: The equipment environment protection mechanism (2) comprises an L-shaped frame (21) arranged in the box facing the output interface of the voltage transformer (0), a fan (22), a heating network (23) and an insulating protective plate (24) arranged on the vertical surface of the L-shaped frame (21), and a temperature and humidity sensor (25) arranged on the plane of the L-shaped frame (21); the electrical output protection mechanism (3) comprises an output interface (31) and a power supply interface (32) arranged on the front of the box body (1), a touch screen (33) arranged on the front of the box body (1), and a main housing (34) arranged inside the box body, wherein a main control board (30) is arranged inside the main housing (34), and a microprocessor (301), a positioning module (302), a fan drive circuit module (303), a temperature controller module (304), a current sampling module (305), a line switching module (306), and a fault judgment module (307) are integrated on the main control board (30). ), a wireless data transmission module (308); the secondary output end of the voltage transformer (0) is connected to the output interface (31) via the current sampling module (303) and the normally closed end of the line switching module (306); the temperature and humidity sensor (25) is connected to an input end of the microprocessor (301); the corresponding two output ends of the microprocessor (31) are respectively connected to the fan (22) and the heating network (23) via the fan driving circuit module (303) and the temperature controller module (304); the current sampling module (303) is connected to an input end of the microprocessor (301); the normally open end of the fault judgment module (307) is connected to an input end of the microprocessor (301) via the fault judgment module (307); the corresponding output end of the microprocessor is connected to the coil end of the line switching module (306); the touch screen (33), the positioning module (302), and the wireless data transmission module (308) are serially connected to the microprocessor (301).

2. The voltage transformer protection device with a positioning structure according to claim 1 is characterized in that: A power converter (4) is also provided in the box (1), and the power supply interface (32) is respectively connected to a microprocessor (301), a positioning module (302), a fan drive circuit module (303), a temperature controller module (304), a wireless data transmission module (308) and a touch screen (33) on the main control board (30) through the power converter (4).

3. The voltage transformer protection device with a positioning structure according to claim 2 is characterized in that: The box body (1) is inclined inwardly at a side away from the equipment environment protection mechanism (2), and an exhaust grille (11) is provided on the inclined surface. The upper edge of each opening of the exhaust grille (11) is provided with a shielding strip (12) inclined downward.

4. The voltage transformer protection device with a positioning structure according to claim 3 is characterized in that: The insulating protective plate (24) is a PEEK polytetrafluoroethylene plate with ventilation holes.

5. The voltage transformer protection device with a positioning structure according to claim 4 is characterized in that: The microprocessor (301) adopts the minimum system circuit of the STM32F103 single-chip microcomputer.

6. The voltage transformer protection device with a positioning structure according to claim 5 is characterized in that: The positioning module (302) adopts an ATGM336H dual-mode positioning module.

7. The voltage transformer protection device with a positioning structure according to claim 6 is characterized in that: The line switching module (306) adopts a G9KA power relay.

8. The voltage transformer protection device with a positioning structure according to claim 7 is characterized in that: The fault judgment module (307) comprises a current limiting resistor, a voltage bias chip and a pair of collection resistors; the normally closed end of the line switching module (306) is connected to the front stage of the current limiting resistor, the two collection resistors are respectively connected to the rear stage of the current limiting resistor, the voltage bias chip is connected to one collection resistor via a diode, and the other collection resistor is grounded.

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