CN106324421A - Electric leakage fault monitoring device for power grid transformer - Google Patents
Electric leakage fault monitoring device for power grid transformer Download PDFInfo
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- CN106324421A CN106324421A CN201610760929.3A CN201610760929A CN106324421A CN 106324421 A CN106324421 A CN 106324421A CN 201610760929 A CN201610760929 A CN 201610760929A CN 106324421 A CN106324421 A CN 106324421A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses an electric leakage fault monitoring device for a power grid transformer, and the device comprises a main processor, a voltage transformer, a signal conditioning circuit, an alarm circuit, a bus self-taking power circuit, a wireless communication module, and a power module. The input end of the voltage transformer is connected with a load side of a transformer, and the output end of the voltage transformer is connected with the signal conditioning circuit. The signal conditioning circuit, the alarm circuit and the wireless communication module are respectively connected with the main processor. The bus self-taking power circuit is connected with the power module, and the power module supplies power to the device. The device timely reminds a maintainer of carrying out the processing, brings convenience to the maintainer for quickly searching a fault point, shortens the maintenance time, and reduces the economic loss. The power is obtained from a bus, so the power supply is convenient. Moreover, the device is provided with the voltage conditioning circuit, thereby enabling the output voltage to be stable.
Description
Technical field
The present invention relates to electric network transformer monitoring device, be specifically related to a kind of electrical network monitoring transformer leakage fault and become
Depressor leak current fault monitoring device.
Background technology
When network transformer is because of reason generation leak current fault tripping operations such as short circuit or ground connection, if no user reports fault, platform district for repairment
Management personnel cannot grasp platform district distribution ruuning situation in real time.Platform district distribution causes user's acquisition terminal and table meter to stop after having a power failure
Electricity, if sending a telegram in reply not in time, acquisition terminal cannot upload table meter freezing data, causes a large amount of abnormal datas of generation.
Summary of the invention
For solving the problems referred to above, the present invention provides one can monitor leak current fault in real time, and reminds management personnel's in time
Network transformer leak current fault monitoring device.
The technical scheme is that a kind of network transformer leak current fault monitoring device, including: primary processor, voltage
Transformer, signal conditioning circuit, warning circuit, bus automatic electricity getting source circuit, wireless communication module, power module；
Described voltage transformer input is connected with transformer load side, the outfan of described voltage transformer and signal condition electricity
Road connects, and described signal conditioning circuit, warning circuit, wireless communication module are connected with primary processor respectively；Described bus is asked for
Power circuit is connected with power module, and described power module is powered to device；
Described bus automatic electricity getting source circuit includes rectangle power taking iron core and voltage modulate circuit；The input of described rectangle power taking iron core
End is wound around bus, and the outfan of described rectangle power taking iron core is wound around secondary coil, and secondary coil is connected with voltage modulate circuit；
Voltage modulate circuit includes inputting divider resistance, voltage comparator, positive half cycle amplitude setup unit, the setting of negative half period amplitude
Unit, photoelectric coupling output unit, thyristor electronic switch and release resistance；Wherein input divider resistance, voltage comparator, light
Electric coupling output unit, thyristor electronic switch and release resistance access power module after being sequentially connected in series, and voltage comparator is respectively
It is connected with positive half cycle amplitude setup unit and negative half period amplitude setup unit 25, thyristor electronic switch ground connection.
Further, also include that instantaneous high pressure protection circuit, described instantaneous high pressure protection circuit include shell fragment T, pressure-sensitive electricity
Resistance R2, resistance R3, resistance R4, rectifier bridge U1, filter capacitor C1, optocoupler U2 and display lamp L2, described shell fragment T, varistor R2
With power sources in series, described resistance R3 connects with rectifier bridge U1 and in parallel with described varistor R2, described filter capacitor C1 and institute
Stating rectifier bridge U1 series connection, described resistance R4, display lamp L2 and optocoupler U2 are in parallel with described filter capacitor C1.
Further, described warning circuit resistance R1, audion Q1, relay K 1, display lamp L1, buzzer Y；Resistance R1
One end is connected with primary processor outfan, and the resistance R1 other end is connected with the base stage of audion Q1, and the emitter stage of audion Q1 connects
Ground, the colelctor electrode of audion Q1 connects voltage source by the coil of relay K 1, and the contact of relay K 1 connects the display lamp of concatenation
L1, buzzer Y.
Further, wireless communication module is GPRS module.
Further, GPRS module connects SIM interface module.
Further, primary processor is STM32F103RET6 processor based on Cortex-M3 kernel.
Further, also include that memory module, described memory module are connected with primary processor.
Further, also include that usb interface module, described usb interface module are connected with primary processor.
The network transformer leak current fault monitoring device that the present invention provides, utilizes voltage transformer to gather transformer load side
Voltage, and real-time Transmission is to primary processor, when causing earth leakage protective device to trip because of the fault such as line short or ground connection, voltage is mutual
Sensor monitors load side decompression, and alarm signal is transferred to remote control terminal by wireless communication module or passes through by primary processor
The form of note is sent to operation maintenance personnel, to remind operation maintenance personnel to handle it in time, facilitates operation maintenance personnel quickly to search fault
Point, shortens maintenance time, reduces economic loss etc..The power supply of this device takes from bus, and power supply is convenient, and is provided with voltage conditioning
Circuit, makes output voltage stabilization.
Accompanying drawing explanation
Fig. 1 is specific embodiment of the invention principle schematic.
Fig. 2 is the circuit diagram of bus automatic electricity getting source circuit.
Fig. 3 is the circuit diagram of voltage modulate circuit.
Fig. 4 is the circuit diagram of warning circuit.
Fig. 5 is the circuit diagram of instantaneous high pressure protection circuit.
In figure, 1 voltage transformer, 2 signal conditioning circuits, 3 bus automatic electricity getting source circuits, 4 power modules, 5 instantaneous high pressures
Protection circuit, 6 primary processors, 7 warning circuits, 8 wireless communication modules, 9 memory modules, 10USB interface module, 11 buses, 12
Rectangle power taking iron core, 13 secondary coils, 14 voltage modulate circuits, 15 input divider resistances, 16 voltage comparators, 17 positive half cycle width
Value setup unit, 18 negative half period amplitude setup units, 19 photoelectric coupling output units, 20 thyristor electronic switchs, 21 release electricity
Resistance, R1, R3, R4 resistance, R2 varistor, L1, L2 display lamp, Y buzzer, C1 filter capacitor, U1 rectifier bridge, U2 optocoupler, T bullet
Sheet.
Detailed description of the invention
The present invention will be described in detail below in conjunction with the accompanying drawings and by specific embodiment, and following example are to the present invention
Explanation, and the invention is not limited in implementation below.
As it is shown in figure 1, the network transformer leak current fault monitoring device that the present invention provides, mutual including primary processor 6, voltage
Sensor 1, signal conditioning circuit 2, warning circuit 7, bus automatic electricity getting source circuit 3, wireless communication module 8, power module 4.
Voltage transformer 1 input is connected with transformer load side, the outfan of voltage transformer 1 and signal conditioning circuit
2 connect, and signal conditioning circuit 2, warning circuit 7, wireless communication module 8 are connected with primary processor 6 respectively.Bus ask for power supply electricity
Road 3 is connected with power module 4, and power module 4 is powered to device.In the present embodiment, primary processor 6 can use based on Cortex-
The STM32F103RET6 processor of M3 kernel, processing speed is fast, reports to the police in time.Wireless communication module 8 can use GPRS module,
GPRS module connects SIM interface module, to realize SMS alarm, convenient timely.This device also sets up memory module 9 He
Usb interface module 10, memory module 9, usb interface module 10 are connected with primary processor 6 respectively.Memory module 9 is used for storing event
Barrier information, usb interface module 10 connects USB, in order to derived by fault message, for subsequent statistical analysis.
As in figure 2 it is shown, bus automatic electricity getting source circuit 3 includes rectangle power taking iron core 12 and voltage modulate circuit 14；Rectangle takes
The input of ferroelectric core 12 is wound around bus 11, and the outfan of rectangle power taking iron core 12 is wound around secondary coil 13, secondary coil 13 with
Voltage modulate circuit 14 connects.
As it is shown on figure 3, voltage modulate circuit 14 includes that input divider resistance 15, voltage comparator 16, positive half cycle amplitude set
Cell 17, negative half period amplitude setup unit 18, photoelectric coupling output unit 19, thyristor electronic switch 20 and release resistance
21；Wherein input divider resistance 15, voltage comparator 16, photoelectric coupling output unit 19, thyristor electronic switch 20 and release
Resistance 21 be sequentially connected in series after access power module 4, voltage comparator 16 respectively with positive half cycle amplitude setup unit 17 and negative half period
Amplitude setup unit 18 connects, thyristor electronic switch 20 ground connection.
Voltage modulate circuit 14 uses voltage comparator 16 to detect the amplitude of the positive and negative both direction of three-phase alternating voltage, will inspection
The amplitude measured compares with the voltage value pre-set, and once has the amplitude of any one signal to exceed setting in advance
Definite value, is switched on the gate of releasing controlled by thyristor electronic switch 20, is released by the energy of Overvoltage Amplitude, and once mistake
When the amplitude of voltage returns to below setting value, IGCT closing gate, measured signal normally enters measuring instrument and measures.
Voltage modulate circuit 14, for any Overvoltage Amplitude of bus 11 voltage, can be set very easily.
As shown in Figure 4, warning circuit 7 resistance R1, audion Q1, relay K 1, display lamp L1, buzzer Y；Resistance R1 mono-
End is connected with primary processor 6 outfan, and the resistance R1 other end is connected with the base stage of audion Q1, and the emitter stage of audion Q1 connects
Ground, the colelctor electrode of audion Q1 connects voltage source by the coil of relay K 1, and the contact of relay K 1 connects the display lamp of concatenation
L1, buzzer Y.
As it is shown in figure 5, this device is additionally provided with instantaneous high pressure protection circuit 5, instantaneous high pressure protection circuit 5 include shell fragment T,
Varistor R2, resistance R3, resistance R4, rectifier bridge U1, filter capacitor C1, optocoupler U2 and display lamp L2；Shell fragment T, varistor
R2 and power sources in series, resistance R3 connects with rectifier bridge U1 and in parallel with varistor R2, and filter capacitor C2 and rectifier bridge U1 goes here and there
Connection, resistance R4, display lamp L2 and optocoupler U2 are in parallel with filter capacitor C1.
When the instantaneous high pressures such as thunder and lightning invade from feed cable, first make varistor R2 and shell fragment T action, pressure-sensitive electricity
Resistance R2 produces pressure limiting effect, limits lightning impulse voltage and rises, protects rear class equipment；Suffer excessive thunderbolt as varistor R2 and
Impaired adstante febre, by the soldered structure of shell fragment T, can be rapidly separated circuit, it is ensured that instantaneous high pressure protection circuit 5 is only
Heat；And after circuit rear class is filtered by resistance R3 blood pressure lowering, rectifier bridge U1 rectification and filter capacitor C1, by display lamp L2 display report
Alert, it is also turned on the output of optocoupler U2 normal signal；Extinguishing when shell fragment T action disconnects rear indicator light L2, optocoupler U2 exports disconnection, with
Just instruction instantaneous high pressure protection circuit 5 duty；The reliability that shell fragment T departs from circuit is high, does not results in security incident.
Only the preferred embodiment of the present invention disclosed above, but the present invention is not limited to this, any this area
What technical staff can think does not has a creative change, and the some improvement made without departing from the principles of the present invention and
Retouching, all should be within the scope of the present invention.
Claims (8)
1. a network transformer leak current fault monitoring device, it is characterised in that including: primary processor, voltage transformer, signal
Modulate circuit, warning circuit, bus automatic electricity getting source circuit, wireless communication module, power module；
Described voltage transformer input is connected with transformer load side, the outfan of described voltage transformer and signal condition electricity
Road connects, and described signal conditioning circuit, warning circuit, wireless communication module are connected with primary processor respectively；Described bus is asked for
Power circuit is connected with power module, and described power module is powered to device；
Described bus automatic electricity getting source circuit includes rectangle power taking iron core and voltage modulate circuit；The input of described rectangle power taking iron core
End is wound around bus, and the outfan of described rectangle power taking iron core is wound around secondary coil, and secondary coil is connected with voltage modulate circuit；
Voltage modulate circuit includes inputting divider resistance, voltage comparator, positive half cycle amplitude setup unit, the setting of negative half period amplitude
Unit, photoelectric coupling output unit, thyristor electronic switch and release resistance；Wherein input divider resistance, voltage comparator, light
Electric coupling output unit, thyristor electronic switch and release resistance access power module after being sequentially connected in series, and voltage comparator is respectively
It is connected with positive half cycle amplitude setup unit and negative half period amplitude setup unit, thyristor electronic switch ground connection.
2. according to the network transformer leak current fault monitoring device shown in claim 1, it is characterised in that also include instantaneous high pressure
Protection circuit, described instantaneous high pressure protection circuit includes shell fragment T, varistor R2, resistance R3, resistance R4, rectifier bridge U1, filtering
Electric capacity C1, optocoupler U2 and display lamp L2, described shell fragment T, varistor R2 and power sources in series, described resistance R3 and rectifier bridge U1 goes here and there
Joining and in parallel with described varistor R2, described filter capacitor C1 connects with described rectifier bridge U1, described resistance R4, display lamp
L2 and optocoupler U2 is in parallel with described filter capacitor C1.
Network transformer leak current fault monitoring device the most according to claim 1 and 2, it is characterised in that described warning electricity
Road resistance R1, audion Q1, relay K 1, display lamp L1, buzzer Y；Resistance R1 one end is connected with primary processor outfan, electricity
The resistance R1 other end is connected with the base stage of audion Q1, and the grounded emitter of audion Q1, the colelctor electrode of audion Q1 passes through relay
The coil of device K1 connects voltage source, and the contact of relay K 1 connects display lamp L1, the buzzer Y of concatenation.
Network transformer leak current fault monitoring device the most according to claim 1 and 2, it is characterised in that radio communication mold
Block is GPRS module.
Network transformer leak current fault monitoring device the most according to claim 4, it is characterised in that GPRS module connects to be had
SIM interface module.
Network transformer leak current fault monitoring device the most according to claim 1 and 2, it is characterised in that primary processor is
STM32F103RET6 processor based on Cortex-M3 kernel.
Network transformer leak current fault monitoring device the most according to claim 1 and 2, it is characterised in that also include storage
Module, described memory module is connected with primary processor.
Network transformer leak current fault monitoring device the most according to claim 1 and 2, it is characterised in that also include that USB connects
Mouth die block, described usb interface module is connected with primary processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610760929.3A CN106324421B (en) | 2016-08-30 | 2016-08-30 | A kind of network transformer leak current fault monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610760929.3A CN106324421B (en) | 2016-08-30 | 2016-08-30 | A kind of network transformer leak current fault monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106324421A true CN106324421A (en) | 2017-01-11 |
| CN106324421B CN106324421B (en) | 2018-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610760929.3A Active CN106324421B (en) | 2016-08-30 | 2016-08-30 | A kind of network transformer leak current fault monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423440A (en) * | 2020-11-10 | 2021-02-26 | 珠海银河智能电网有限公司 | Indicating lamp circuit, control method and device, power supply equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09149540A (en) * | 1995-11-21 | 1997-06-06 | Hitachi Ltd | Circuit selective relay, circuit selection method |
| CN105510773A (en) * | 2016-01-28 | 2016-04-20 | 广州优维电子科技有限公司 | Earth fault detection device for direct current system |
| CN205353273U (en) * | 2016-02-22 | 2016-06-29 | 国家电网公司 | A distributed terminating set for distribution network phase to earth fault travelling wave location |
| CN205484648U (en) * | 2015-12-15 | 2016-08-17 | 云南电网有限责任公司玉溪供电局 | Distribution lines on -line monitoring device |
-
2016
- 2016-08-30 CN CN201610760929.3A patent/CN106324421B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09149540A (en) * | 1995-11-21 | 1997-06-06 | Hitachi Ltd | Circuit selective relay, circuit selection method |
| CN205484648U (en) * | 2015-12-15 | 2016-08-17 | 云南电网有限责任公司玉溪供电局 | Distribution lines on -line monitoring device |
| CN105510773A (en) * | 2016-01-28 | 2016-04-20 | 广州优维电子科技有限公司 | Earth fault detection device for direct current system |
| CN205353273U (en) * | 2016-02-22 | 2016-06-29 | 国家电网公司 | A distributed terminating set for distribution network phase to earth fault travelling wave location |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423440A (en) * | 2020-11-10 | 2021-02-26 | 珠海银河智能电网有限公司 | Indicating lamp circuit, control method and device, power supply equipment and storage medium |
| CN112423440B (en) * | 2020-11-10 | 2023-10-20 | 珠海银河智能电网有限公司 | Indicator light circuit, control method and device, power supply equipment and storage medium |
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| Publication number | Publication date |
|---|---|
| CN106324421B (en) | 2018-02-27 |
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Inventor after: Xing Guanming Inventor after: Xue Zhaoke Inventor after: Tian Gang Inventor after: Zhao Ailing Inventor after: Yu Sen Inventor after: Li Chao Inventor after: Zhang Leilei Inventor after: Kang Huibin Inventor after: Song Wei Inventor after: Ma Zhijun Inventor before: Ma Zhijun Inventor before: Xiao Lei Inventor before: Xue Zhaoke |
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