CN106324421B - A kind of network transformer leak current fault monitoring device - Google Patents
A kind of network transformer leak current fault monitoring device Download PDFInfo
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- CN106324421B CN106324421B CN201610760929.3A CN201610760929A CN106324421B CN 106324421 B CN106324421 B CN 106324421B CN 201610760929 A CN201610760929 A CN 201610760929A CN 106324421 B CN106324421 B CN 106324421B
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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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- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
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Abstract
The present invention discloses a kind of network transformer leak current fault monitoring device, including：Primary processor, voltage transformer, signal conditioning circuit, warning circuit, bus ask for power circuit, wireless communication module, power module；Voltage transformer input is connected with transformer load side, and the output end of voltage transformer is connected with signal conditioning circuit, and signal conditioning circuit, warning circuit, wireless communication module are connected with primary processor respectively；Bus is asked for power circuit and is connected with power module, and power module is powered to device.It is of the invention to remind operation maintenance personnel to handle it in time, facilitate operation maintenance personnel quickly to search trouble point, shorten maintenance time, reduce economic loss, power supply is derived from bus, and power supply is convenient, and is provided with voltage modulate circuit, makes output voltage stabilization.
Description
Technical field
The present invention relates to electric network transformer monitoring device, and in particular to a kind of power network for monitoring transformer leakage failure becomes
Depressor leak current fault monitoring device.
Background technology
When network transformer trips because leak current fault occurs for the reason such as short circuit or ground connection, if no user reports failure, taiwan area for repairment
Administrative staff can not grasp taiwan area distribution running situation in real time.Taiwan area distribution causes user's acquisition terminal and meter to stop after having a power failure
Electricity, if sending a telegram in reply not in time, acquisition terminal can not upload meter freezing data, cause to produce a large amount of abnormal datas.
The content of the invention
To solve the above problems, the present invention, which provides one kind, can monitor leak current fault in real time, and remind administrative staff'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 ask for power circuit, wireless communication module, power module；
The voltage transformer input is connected with transformer load side, and output end and the signal of the voltage transformer are adjusted
Circuit connection is managed, the signal conditioning circuit, warning circuit, wireless communication module are connected with primary processor respectively；The bus
Ask for power circuit to be connected with power module, the power module is powered to device；
The bus, which asks for power circuit, includes rectangle power taking iron core and voltage modulate circuit；The rectangle power taking iron core
Input winds bus, the output end winding secondary coil of the rectangle power taking iron core, and secondary coil connects with voltage modulate circuit
Connect；
Voltage modulate circuit includes input divider resistance, voltage comparator, positive half cycle amplitude setup unit, negative half period amplitude
Setup unit, photoelectric coupling output unit, thyristor electronic switch and release resistance；Wherein input divider resistance, voltage ratio compared with
Device, photoelectric coupling output unit, thyristor electronic switch and release resistance access power module, voltage comparator after being sequentially connected in series
It is connected respectively with positive half cycle amplitude setup unit and negative half period amplitude setup unit 25, thyristor electronic switch ground connection.
Further, in addition to instantaneous high pressure protection circuit, the instantaneous high pressure protection circuit include shell fragment T, pressure-sensitive electricity
Hinder R2, resistance R3, resistance R4, rectifier bridge U1, filter capacitor C1, optocoupler U2 and indicator lamp L2, the shell fragment T, piezo-resistance R2
With power sources in series, the resistance R3 is connected with rectifier bridge U1 and, the filter capacitor C1 and institute in parallel with the piezo-resistance R2
Rectifier bridge U1 series connection is stated, the resistance R4, indicator lamp L2 and optocoupler U2 are in parallel with the filter capacitor C1.
Further, the warning circuit resistance R1, triode Q1, relay K1, indicator lamp L1, buzzer Y；Resistance R1
One end is connected with primary processor output end, and the resistance R1 other ends are connected with triode Q1 base stage, and triode Q1 emitter stage connects
Ground, triode Q1 colelctor electrode connect voltage source, the indicator lamp of relay K1 contact connection concatenation by relay K1 coil
L1, buzzer Y.
Further, wireless communication module is GPRS module.
Further, GPRS module is connected with SIM card interface module.
Further, primary processor is the STM32F103RET6 processors based on Cortex-M3 kernels.
Further, in addition to memory module, the memory module are connected with primary processor.
Further, in addition to usb interface module, the usb interface module are connected with primary processor.
Network transformer leak current fault monitoring device provided by the invention, transformer load side is gathered using voltage transformer
Voltage, and real-time Transmission, to primary processor, when causing earth leakage protective device to trip because of failures 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 passed through by primary processor
The form of short message is sent to operation maintenance personnel, to remind operation maintenance personnel to handle it in time, facilitates operation maintenance personnel quickly to search failure
Point, shorten maintenance time, reduce economic loss etc..The power supply of the present apparatus is derived from bus, and power supply is convenient, and is provided with voltage conditioning
Circuit, make output voltage stabilization.
Brief description of the drawings
Fig. 1 is specific embodiment of the invention principle schematic.
Fig. 2 is the circuit diagram that bus asks for power 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 buses ask for power circuit, 4 power modules, 5 instantaneous high pressures
Protection circuit, 6 primary processors, 7 warning circuits, 8 wireless communication modules, 9 memory modules, 10USB interface modules, 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
It is worth 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 piezo-resistances, L1, L2 indicator lamp, Y buzzers, C1 filter capacitors, U1 rectifier bridges, U2 optocouplers, T bullets
Piece.
Embodiment
Below in conjunction with the accompanying drawings and the present invention will be described in detail by specific embodiment, and following examples are to the present invention
Explanation, and the invention is not limited in implementation below.
As shown in figure 1, network transformer leak current fault monitoring device provided by the invention, including primary processor 6, voltage are mutual
Sensor 1, signal conditioning circuit 2, warning circuit 7, bus ask for power circuit 3, wireless communication module 8, power module 4.
The input of voltage transformer 1 is connected with transformer load side, the output end and signal conditioning circuit of voltage transformer 1
2 connections, signal conditioning circuit 2, warning circuit 7, wireless communication module 8 are connected with primary processor 6 respectively.Bus asks 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 and be based on Cortex-
The STM32F103RET6 processors of M3 kernels, processing speed is fast, and alarm is timely.Wireless communication module 8 can use GPRS module,
GPRS module is connected with SIM card interface module, convenient timely to realize SMS alarm.The present apparatus also sets up the He of memory module 9
Usb interface module 10, memory module 9, usb interface module 10 are connected with primary processor 6 respectively.Memory module 9 is used to store event
Hinder information, usb interface module 10 connects USB, so as to which fault message is exported, for subsequent statistical analysis.
As shown in Fig. 2 bus, which asks for power circuit 3, includes rectangle power taking iron core 12 and voltage modulate circuit 14；Rectangle takes
Ferroelectric core 12 input winding bus 11, rectangle power taking iron core 12 output end winding secondary coil 13, secondary coil 13 with
Voltage modulate circuit 14 connects.
Set as shown in figure 3, voltage modulate circuit 14 includes input divider resistance 15, voltage comparator 16, positive half cycle amplitude
Order member 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 is connected, and thyristor electronic switch 20 is grounded.
Voltage modulate circuit 14 detects the amplitude of the positive and negative both direction of three-phase alternating voltage using voltage comparator 16, will examine
The amplitude measured is compared with the voltage value pre-set, once the amplitude for having any one signal has exceeded advance set
Definite value, the gate of releasing controlled by thyristor electronic switch 20 is switched on, the energy of Overvoltage Amplitude is released, once and mistake
When the amplitude of voltage is returned to below setting value, IGCT closing gate, measured signal normally enters measuring instrument and measured.
Voltage modulate circuit 14 can very easily be set for any Overvoltage Amplitude of the voltage of bus 11.
As shown in figure 4, the resistance R1 of warning circuit 7, triode Q1, relay K1, indicator lamp L1, buzzer Y；Resistance R1 mono-
End is connected with the output end of primary processor 6, and the resistance R1 other ends are connected with triode Q1 base stage, and triode Q1 emitter stage connects
Ground, triode Q1 colelctor electrode connect voltage source, the indicator lamp of relay K1 contact connection concatenation by relay K1 coil
L1, buzzer Y.
As shown in figure 5, the present apparatus is additionally provided with instantaneous high pressure protection circuit 5, instantaneous high pressure protection circuit 5 include shell fragment T,
Piezo-resistance R2, resistance R3, resistance R4, rectifier bridge U1, filter capacitor C1, optocoupler U2 and indicator lamp L2；Shell fragment T, piezo-resistance
R2 and power sources in series, resistance R3 is connected with rectifier bridge U1 and, filter capacitor C2 and rectifier bridge U1 string in parallel with piezo-resistance R2
Connection, resistance R4, indicator 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, cause piezo-resistance R2 and shell fragment T actions, pressure-sensitive electricity first
Hinder R2 and produce pressure limiting effect, limitation lightning impulse voltage rises, and protects rear class equipment；When piezo-resistance R2 by it is excessive thunderbolt and
Impaired adstante febre, by shell fragment T low-temperature welding structure, circuit can be rapidly separated, ensures instantaneous high pressure protection circuit 5 only
Heat；And after circuit rear class is filtered by resistance R3 decompressions, rectifier bridge U1 rectifications and filter capacitor C1, pass through indicator lamp L2 and show report
It is alert, it is also turned on the output of optocoupler U2 normal signals；Rear indicator light L2 extinguishings are disconnected when shell fragment T is acted, optocoupler U2 outputs disconnect, with
Just the working condition of instantaneous high pressure protection circuit 5 is indicated；The reliability that shell fragment T departs from circuit is high, will not cause security incident.
Disclosed above is only the preferred embodiment of the present invention, but the present invention is not limited to this, any this area
What technical staff can think does not have creative change, and some improvement made without departing from the principles of the present invention and
Retouching, should all be within the scope of the present invention.
Claims (7)
- A kind of 1. network transformer leak current fault monitoring device, it is characterised in that including：Primary processor, voltage transformer, signal Modulate circuit, warning circuit, bus ask for power circuit, wireless communication module, power module；The voltage transformer input is connected with transformer load side, output end and the signal condition electricity of the voltage transformer Road is connected, and the signal conditioning circuit, warning circuit, wireless communication module are connected with primary processor respectively；The bus is asked for Power circuit is connected with power module, and the power module is powered to device；The bus, which asks for power circuit, includes rectangle power taking iron core and voltage modulate circuit；The input of the rectangle power taking iron core End winding bus, the output end winding secondary coil of the rectangle power taking iron core, secondary coil are connected with voltage modulate circuit；Voltage modulate circuit includes input 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 It is electrically coupled after output unit, thyristor electronic switch and release resistance are sequentially connected in series and accesses power module, voltage comparator difference It is connected with positive half cycle amplitude setup unit and negative half period amplitude setup unit, thyristor electronic switch ground connection；Also include instantaneous high pressure protection circuit, the instantaneous high pressure protection circuit includes shell fragment T, piezo-resistance R2, resistance R3, electricity R4, rectifier bridge U1, filter capacitor C1, optocoupler U2 and indicator lamp L2 are hindered, the shell fragment T, piezo-resistance R2 and power sources in series are described Resistance R3 connects and in parallel with the piezo-resistance R2 with rectifier bridge U1, and the filter capacitor C1 connects with the rectifier bridge U1, The resistance R4, indicator lamp L2 and optocoupler U2 are in parallel with the filter capacitor C1.
- 2. network transformer leak current fault monitoring device according to claim 1, it is characterised in that the warning circuit electricity Hinder R1, triode Q1, relay K1, indicator lamp L1, buzzer Y；Resistance R1 one end is connected with primary processor output end, resistance R1 The other end is connected with triode Q1 base stage, triode Q1 grounded emitter, and triode Q1 colelctor electrode passes through relay K1 Coil connect voltage source, indicator lamp L1, the buzzer Y of relay K1 contact connection concatenation.
- 3. network transformer leak current fault monitoring device according to claim 1, it is characterised in that wireless communication module is GPRS module.
- 4. network transformer leak current fault monitoring device according to claim 3, it is characterised in that GPRS module is connected with SIM card interface module.
- 5. network transformer leak current fault monitoring device according to claim 1, it is characterised in that primary processor be based on The STM32F103RET6 processors of Cortex-M3 kernels.
- 6. network transformer leak current fault monitoring device according to claim 1, it is characterised in that also include storage mould Block, the memory module are connected with primary processor.
- 7. network transformer leak current fault monitoring device according to claim 1, it is characterised in that also including USB interface Module, the usb interface module are 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 |
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| 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 |
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| CN106324421A CN106324421A (en) | 2017-01-11 |
| CN106324421B true CN106324421B (en) | 2018-02-27 |
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| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3278561B2 (en) * | 1995-11-21 | 2002-04-30 | 株式会社日立製作所 | How to select the faulty line of the parallel transmission line |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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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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