CN106356810A - Embedding type selective electric leakage protection device of underground low-voltage power grid - Google Patents
Embedding type selective electric leakage protection device of underground low-voltage power grid Download PDFInfo
- Publication number
- CN106356810A CN106356810A CN201610909471.3A CN201610909471A CN106356810A CN 106356810 A CN106356810 A CN 106356810A CN 201610909471 A CN201610909471 A CN 201610909471A CN 106356810 A CN106356810 A CN 106356810A
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- China
- Prior art keywords
- module
- control chip
- main control
- outfan
- protection device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
- H02H1/0084—Details of emergency protective circuit arrangements concerning transmission of signals by means of pilot wires or a telephone network; watching of these wires
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
Abstract
The invention discloses an embedding type selective electric leakage protection device of an underground low-voltage power grid. The embedding type selective electric leakage protection device comprises a protective mounting box, wherein an integrated circuit board is fixedly mounted in the protective mounting box; a main control chip is welded on the integrated circuit board; a man-machine interaction interface of the main control chip is connected with a man-machine interaction module; a power supply pin of the main control chip is connected with a power supply module; a signal input end of the main control chip is connected with a signal acquisition and conditioning module; an output end of the signal acquisition and conditioning module is connected with a wiring terminal; the wiring terminal is embedded into the front surface of the protective mounting box; the main control chip is further connected with a signal output module; the signal output module comprises a relay control module and an alarming module; a communication pin of the main control chip is further connected with a data communication unit; and data transmission is carried out by the data communication unit and a remote upper computer. According to the embedding type selective electric leakage protection device provided by the invention, a complete network structure is established, and incorrect operation is effectively reduced through centralized control; and a dispersed current leakage problem is solved.
Description
Technical field
The present invention relates to electric and electronic technical field, specially one kind are based on Embedded underground low-tension network selectivity leakage
Electrical protective device.
Background technology
Selective earth leakage protection refers to that earth leakage protective device can selectively send event when electrical network occurs leak current fault
Barrier signal or disengagement failure branch road, and non-fault line normal work, selective earth leakage protection can reduce fault outage scope,
It is easy to find leak current fault source, shorten electric leakage power off time, improve the reliability of power supply；Selective earth leakage protection system accurate
Property, rapidity and reliability are to realize the key of selective earth leakage protection.Domestic colliery low-voltage feeder switch is commonly used at present
Sequential and power direction type principle, main switch and switch-dividing are to realize classification action by the length of time, and switch-dividing
Sentence electric leakage principle existing defects, this mode leads to feeding switch the phenomenons such as malfunction, tripping often, and failure cause is searched tired
Difficulty, has a strong impact on colliery and normally produces.
Content of the invention
For problem above, the invention provides a kind of filled based on Embedded underground low-tension network selective earth leakage protection
Put, build perfect network structure, and maloperation is effectively reduced using centralized Control, solve the problems, such as dispersive leakage, Ke Yiyou
Effect solves the problems, such as in background technology.
For achieving the above object, the present invention provides following technical scheme: one kind is based on Embedded underground low-tension network choosing
Selecting property earth leakage protective device, including protection mounting box, described protection is installed inside and is installed with surface-mounted integrated circuit, described integrated
Main control chip is welded with circuit board, the Man Machine Interface of described main control chip is connected with human-computer interaction module, main control chip
Power pins at be connected with power supply supplying module, the signal input part of main control chip is connected with signal collection modulation module, institute
The outfan stating signal collection modulation module is connected with binding post, and described binding post is embedded in the front of protection mounting box,
Main control chip is also associated with signal output module, and described signal output module includes relay control module and alarm module, main
The communications pins of control chip are also associated with data communication units, and described data communication units and long-range host computer carry out data biography
Defeated.
As a kind of preferred technical scheme of the present invention, described main control chip adopts stm32f103 series embedded processing
Jtag interface and hardware watchdog are provided with device, and main control chip, described jtag interface is used for connecting host computer and enters line program
Download and debug.
As a kind of preferred technical scheme of the present invention, institute's human-computer interaction module includes lcd driver, and described lcd drives
The outfan of device is connected with liquid crystal touch screen and functional keyss.
As a kind of preferred technical scheme of the present invention, described power supply supplying module includes isolating transformer and standby electricity
Source, the input of described isolating transformer is connected to low voltage electric network, the outfan of stand-by power supply and the outfan of isolating transformer
It is connected with rectifier bridge, the outfan of described rectifier bridge is connected with regulated converter.
As a kind of preferred technical scheme of the present invention, described signal collection modulation module includes current sensor group and phase
Bit comparator, the outfan of described current sensor group is connected with wave filter, and the outfan of wave filter is connected with sampling holding and puts
Big device and analog-digital converter, the output pin of described sample/hold amplifier is electrically connected with the input pin of analog-digital converter,
And the outfan of analog-digital converter and phase comparator is connected to the i/o mouth of main control chip.
As a kind of preferred technical scheme of the present invention, described relay control module includes audion Current amplifier electricity
Road, the outfan of described audion current amplification circuit is connected with multi-channel parallel relay.
As a kind of preferred technical scheme of the present invention, described alarm module includes driver, the output of described driver
End is connected with buzzer and warning warning lamp.
As a kind of preferred technical scheme of the present invention, described data communication units include can communication bus, rs485 leads to
Letter bus and radio frequency codec, described can communication bus, rs485 communication bus and radio frequency codec are coupled in parallel to lead to
Letter port, the outfan of radio frequency codec is also associated with RF transceiver.
Compared with prior art, the invention has the beneficial effects as follows: should be based on the leakage of Embedded underground low-tension network selectivity
Electrical protective device, by arranging main control chip, binding signal collection modulation module and signal output module form overall control net
Network is it is achieved that centralized Control；By arranging power supply supplying module, stand-by power supply is set wherein, can effectively prevent electrical network event
Hinder the total system paralysis leading to；By arrange signal collection modulation module, using current sensor group carry out line voltage and
Residual voltage gathers, and enters line phase using phase comparator and compares, can effectively reduce the error in progressive operation, thus effectively
Avoid and maloperation phenomenon occurs；By arranging data communication units, realized using can communication bus and rs485 communication bus
Wired data transfer, realizes wireless data transmission using radio frequency codec and RF transceiver, thus effectively increasing device
Motility；The present invention builds perfect network structure, and effectively reduces maloperation using centralized Control, solves dispersive leakage and asks
Topic.
Brief description
Fig. 1 is modular structure schematic diagram of the present invention；
Fig. 2 is signal collection modulation modular structure schematic diagram；
Fig. 3 is surface structure schematic diagram；
Fig. 4 is master control chip periphery circuit theory diagrams；
Fig. 5 is；26- audion current amplification circuit schematic diagram.
In figure: 1- protects mounting box；2- surface-mounted integrated circuit；3- main control chip；4- human-computer interaction module；5- power supply supplies mould
Block；6- signal collection modulation module；7- binding post；8- signal output module；9- relay control module；10- alarm module；
11- data communication units；12-jtag interface；13- hardware watchdog；14-lcd driver；15- liquid crystal touch screen；16- function
Button；17- isolating transformer；18- stand-by power supply；19- rectifier bridge；20- regulated converter；21- current sensor group；22- phase
Bit comparator；23- wave filter；24- sample/hold amplifier；25- analog-digital converter；26- audion current amplification circuit；27-
Multi-channel parallel relay；28- driver；29- buzzer；30- warning warning lamp；31-can communication bus；32-rs485 communicates
Bus；33- radio frequency codec；34- RF transceiver.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Embodiment:
Refer to Fig. 1 to Fig. 5, the present invention provides a kind of technical scheme: one kind is based on Embedded underground low-tension network selectivity
Earth leakage protective device, including protection mounting box 1, is installed with surface-mounted integrated circuit 2, described collection inside described protection mounting box 1
Become and be welded with main control chip 3 on circuit board 2, the Man Machine Interface of described main control chip 3 is connected with human-computer interaction module 4, main
It is connected with power supply supplying module 5, the signal input part of main control chip 3 is connected with signals collecting and adjusts at the power pins of control chip 3
Reason module 6, the outfan of described signal collection modulation module 6 is connected with binding post 7, and described binding post 7 is embedded in protection
The front of mounting box 1, main control chip 3 is also associated with signal output module 8, and described signal output module 8 includes Control
Module 9 and alarm module 10, the communications pins of main control chip 3 are also associated with data communication units 11, described data communication units
11 are carried out data transmission with long-range host computer；
Described main control chip 3 adopts stm32f103 series flush bonding processor, and is provided with jtag interface 12 on main control chip 3
With hardware watchdog 13, described jtag interface 12 is used for connecting host computer and carries out download program and debugging；Described man-machine interaction mould
Block 4 includes lcd driver 14, and the outfan of described lcd driver 14 is connected with liquid crystal touch screen 15 and functional keyss 16；Described
Power supply supplying module 5 includes isolating transformer 17 and stand-by power supply 18, and the input of described isolating transformer 18 is connected to low pressure
Electrical network, the outfan of the outfan of stand-by power supply 18 and isolating transformer 18 is connected with rectifier bridge 19, described rectifier bridge 19 defeated
Go out end and be connected with regulated converter 20；
Described signal collection modulation module 6 includes current sensor group 21 and phase comparator 22, described current sensor group 21
Outfan be connected with wave filter 23, the outfan of wave filter 23 is connected with sample/hold amplifier 24 and analog-digital converter 25,
The output pin of described sample/hold amplifier 24 and the input pin of analog-digital converter 25 are electrically connected, and analog-digital converter 25
It is connected to the i/o mouth of main control chip 3 with the outfan of phase comparator 22；Described relay control module 9 includes audion
Current amplification circuit 26, the outfan of described audion current amplification circuit 26 is connected with multi-channel parallel relay 27；Described report
Alert module 10 includes driver 28, and the outfan of described driver 28 is connected with buzzer 29 and warning warning lamp 30；Described number
Include can communication bus 31, rs485 communication bus 32 and radio frequency codec 33, described can communication bus according to communication unit 11
31st, rs485 communication bus 32 and radio frequency codec 33 are coupled in parallel to COM1, and the outfan of radio frequency codec 33 is also
It is connected with RF transceiver 34.
The operation principle of the present invention: described protection mounting box 1 is made using insulating corrosion material, can effectively adapt to shaft bottom
Wet environment, protection internal structure prevent damage, described surface-mounted integrated circuit 2 be pcb plate, integrated journey can either be improved
Degree reduces volume, improves circuit stability simultaneously；
Described main control chip 3 adopts stm32f103 series flush bonding processor, and this processor is based on armcortex-m3 core
32 8-digit microcontrollers, lqfp-144 encapsulate；In 512k piece, flash(is equivalent to hard disk), in 64k piece, ram(is equivalent to internal memory),
In piece, flash supports online programming (iap)；The up to frequency of 72m, data, instruction walks different streamlines, respectively to guarantee
The cpu speed of service reaches maximization；By Pian Nei boot area, achievable serial ports downloads (isp)；In piece, double rc crystal oscillators, carry
Frequency for 8m and 32k；The outer high speed crystal oscillator (8m) of supporting pieces, and the outer low speed crystal oscillator (32k) of piece；The wherein outer low speed crystal oscillator of piece can use
In the real-time clock of cpu, carry back-up source pin, for the clock walking after power down；The backing register of 42 16 is (permissible
It is interpreted as the ram that battery preserves), using external button cell, and realize power failure data preservation function；Support jtag, swd adjusts
Examination. coordinate cheap j-link, realize the exploitation debugging plan of low cost at a high speed；(most of compatibility 5v patrols up to 80 io
Volume), 4 general purpose timers, 2 senior intervalometers, 2 basic intervalometers, 3 road spi interfaces, 2 road i2s interfaces, 2 road i2c connect
Mouthful, 5 road usart, a usb from equipment interface, a can interface, sdio interface, compatible sram, nor and nandflash
16 BITBUS network-fsmc of interface；12 ad input of 3 tunnels totally 16 passages, 12 da outputs of 2 tunnels totally 2 passages；Outside supporting pieces solely
Vertical voltage reference；Cpu operating voltage range: 2.0-3.6v；
(1) described main control chip 3 is used for carrying out data analysis and process operation, and described jtag interface 12 is used for carrying out download program
And carrying out on-line debugging operation, described hardware watchdog 13 can prevent program fleet from carrying out forced resetting operation；Described master control
Chip 3 is powered rear normal work by power supply supplying module 5；
Under normal circumstances, described isolating transformer 18 is directly accessed electrical network, by the voltage of electrical network carry out inputting after decompression transformation to
Rectifier bridge 19, when electrical network powers appearance exception, stand-by power supply 18 supplementary power immediately, maintain normal work, described rectifier bridge
19 convert alternating current to unidirectional current, and the signal of telecommunication of output is fed through regulated converter 20, and regulated converter 20 output is stable straight
Stream voltage, to main control chip 3, drives it to start working；
(2) described human-computer interaction module 4 is used for carrying out information input and goes out operation, thus realizing human-computer interaction function, described lcd drives
Dynamic device 14 is used for realizing the lcd level signal conversion of output, and described liquid crystal touch screen 15 can show current operation interface
Parameter setting can be carried out, described functional keyss 16 are used for carrying out function selecting operation, described main control chip 3 receives input and refers to
After order, start to call corresponding program to proceed by data processing operation according to setting priority；
(3) described signal collection modulation module 6 is connected to each sampled point of low voltage electric network, described electric current by binding post 7
Sensor group 21 is used for gathering line voltage and residual voltage size, and the residual voltage of different branch is respectively fed to phase bit comparison
The parallel input terminal of device 22；The output signal collecting is fed through wave filter 23, wave filter 23 by described current sensor group 21
Signal after filtering clutter is fed through sample/hold amplifier 24, described sample/hold amplifier 24 starts according to setpoint frequency
Carry out sampling operation, and the signal collecting is amplified, be analogue signal due to gather, then through analog digital conversion
Device 25 transmits to main control chip 3；
(4) described main control chip 3, according to data collection zone residual voltage size, monitors electric leakage electricity using revising residual voltage method
Resistance, if parameter-beyond-limit, illustrates that electrical network occurs leak current fault, execution electric leakage circuit determining program, otherwise program return；Device
Phase is compared using compare width method, zero-sequence current direction method and zero-sequence current colony amplitude comparison of zero-sequence current according to the number of branches putting into
Method judges to faulty line, adopts zero-sequence current direction method when circuitry number is not more than 2, otherwise sentences leakage base using device
This algorithm carries out decision-making, and rudimentary algorithm is that device is calculated from 3 kinds of route selections according to the circuitry number putting into and each branch road capacitance current feature
The most suitable a kind of algorithm that method is selected, if rudimentary algorithm decision error, device continues circuit is carried out using aided algorithm
Route selection；
(5) described main control chip 3 controls according to result and drives relay control module 9 and alarm module 10, when working out
Now during exception, by output current signal to audion current amplification circuit 26, signal is amplified by audion current amplification circuit 26
Afterwards, control that relay saltus step in corresponding multi-channel parallel relay 27 to normal-closed end, disconnecting circuit；Output letter simultaneously
Number to driver 28, driver 28 will drive buzzer 29 begin to send out audio alarm after power amplification, lighting warning police simultaneously
Show lamp 30；
(6) described data communication units 11 data communication units 11 are used for carrying out data transmission operational control, and described can communication is total
Line 31, rs485 communication bus 32 are connected to different data receivers by rs485 transmission line and can transmission line respectively, real
Existing wired data transfer；Described radio frequency codec 33 is used for for data signal being converted into radiofrequency signal, is then received by radio frequency
Send out device 34 and carry out radio-frequency receiving-transmitting, realize wireless data transmission, improve the motility of device.
Embedded underground low-tension network selective leakage protection device should be based on, by arranging main control chip 3, in conjunction with letter
Number collection modulation module 6 and signal output module 8 forms overall controlling network it is achieved that centralized Control；Supplied by arranging power supply
To module 5, stand-by power supply 18 is set wherein, can effectively prevent the total system paralysis that electric network fault leads to；By setting
Signal collection modulation module 6, carries out line voltage and residual voltage collection using current sensor group 21, using phase comparator
22 enter line phase compares, and can effectively reduce the error in progressive operation, thus effectively prevent maloperation phenomenon；Pass through
Setting data communication units 11, realize wired data transfer using can communication bus 31 and rs485 communication bus 32, using penetrating
Frequency codec 33 and RF transceiver 34 realize wireless data transmission, thus effectively increasing device motility；The present invention takes
Build perfect network structure, and maloperation is effectively reduced using centralized Control, solve the problems, such as dispersive leakage.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (8)
1. one kind is based on Embedded underground low-tension network selective leakage protection device, including protection mounting box (1), described guarantor
Be installed with surface-mounted integrated circuit (2) inside shield mounting box (1) it is characterised in that: be welded with master on described surface-mounted integrated circuit (2)
Control chip (3), the Man Machine Interface of described main control chip (3) is connected with human-computer interaction module (4), the electricity of main control chip (3)
It is connected with power supply supplying module (5), the signal input part of main control chip (3) is connected with signal collection modulation module at source pin
(6), the outfan of described signal collection modulation module (6) is connected with binding post (7), and described binding post (7) is embedded in guarantor
The front of shield mounting box (1), main control chip (3) is also associated with signal output module (8), and described signal output module (8) includes
Relay control module (9) and alarm module (10), the communications pins of main control chip (3) are also associated with data communication units
(11), described data communication units (11) are carried out data transmission with long-range host computer.
2. one kind according to claim 1 is based on Embedded underground low-tension network selective leakage protection device, and it is special
Levy and be: described main control chip (3) adopts stm32f103 series flush bonding processor, and is provided with jtag on main control chip (3)
Interface (12) and hardware watchdog (13), described jtag interface (12) is used for connecting host computer and carries out download program and debugging.
3. one kind according to claim 1 is based on Embedded underground low-tension network selective leakage protection device, and it is special
Levy and be: institute's human-computer interaction module (4) includes lcd driver (14), the outfan of described lcd driver (14) is connected with liquid crystal
Touch screen (15) and functional keyss (16).
4. one kind according to claim 1 is based on Embedded underground low-tension network selective leakage protection device, and it is special
Levy and be: described power supply supplying module (5) includes isolating transformer (17) and stand-by power supply (18), described isolating transformer (18)
Input be connected to low voltage electric network, the outfan of the outfan of stand-by power supply (18) and isolating transformer (18) is connected with rectification
Bridge (19), the outfan of described rectifier bridge (19) is connected with regulated converter (20).
5. one kind according to claim 1 is based on Embedded underground low-tension network selective leakage protection device, and it is special
Levy and be: described signal collection modulation module (6) includes current sensor group (21) and phase comparator (22), described electric current passes
The outfan of sensor group (21) is connected with wave filter (23), and the outfan of wave filter (23) is connected with sample/hold amplifier (24)
With analog-digital converter (25), the input pin electricity of the output pin of described sample/hold amplifier (24) and analog-digital converter (25)
Gas phase connects, and the outfan of analog-digital converter (25) and phase comparator (22) is connected to the i/o mouth of main control chip (3).
6. one kind according to claim 1 is based on Embedded underground low-tension network selective leakage protection device, and it is special
Levy and be: described relay control module (9) includes audion current amplification circuit (26), described audion current amplification circuit
(26) outfan is connected with multi-channel parallel relay (27).
7. one kind according to claim 1 is based on Embedded underground low-tension network selective leakage protection device, and it is special
Levy and be: described alarm module (10) includes driver (28), the outfan of described driver (28) is connected with buzzer (29)
With warning warning lamp (30).
8. one kind according to claim 1 is based on Embedded underground low-tension network selective leakage protection device, and it is special
Levy and be: described data communication units (11) include can communication bus (31), rs485 communication bus (32) and radio frequency encoding and decoding
Device (33), described can communication bus (31), rs485 communication bus (32) and radio frequency codec (33) are coupled in parallel to communicate
Port, the outfan of radio frequency codec (33) is also associated with RF transceiver (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610909471.3A CN106356810A (en) | 2016-10-19 | 2016-10-19 | Embedding type selective electric leakage protection device of underground low-voltage power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610909471.3A CN106356810A (en) | 2016-10-19 | 2016-10-19 | Embedding type selective electric leakage protection device of underground low-voltage power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106356810A true CN106356810A (en) | 2017-01-25 |
Family
ID=57863317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610909471.3A Pending CN106356810A (en) | 2016-10-19 | 2016-10-19 | Embedding type selective electric leakage protection device of underground low-voltage power grid |
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| CN (1) | CN106356810A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492800A (en) * | 2017-08-15 | 2017-12-19 | 合肥众望电气科技有限公司 | A kind of security power cabinet with warning reminding function |
| CN113503270A (en) * | 2021-06-08 | 2021-10-15 | 大庆特博科技发展有限公司 | Special controller for air suspension fan |
-
2016
- 2016-10-19 CN CN201610909471.3A patent/CN106356810A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492800A (en) * | 2017-08-15 | 2017-12-19 | 合肥众望电气科技有限公司 | A kind of security power cabinet with warning reminding function |
| CN113503270A (en) * | 2021-06-08 | 2021-10-15 | 大庆特博科技发展有限公司 | Special controller for air suspension fan |
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