CN109802410A - A kind of zero line break protection device and method - Google Patents
A kind of zero line break protection device and method Download PDFInfo
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- CN109802410A CN109802410A CN201910228785.0A CN201910228785A CN109802410A CN 109802410 A CN109802410 A CN 109802410A CN 201910228785 A CN201910228785 A CN 201910228785A CN 109802410 A CN109802410 A CN 109802410A
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- chip microcontroller
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- earthing switch
- zero
- voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of zero line break protection device and method, including power module, the power module is used to power for acquisition control module；Acquisition control module, including voltage collection circuit, single-chip microcontroller and SMS module are connect after wherein voltage collection circuit is connect with external three-phase input power supply with the input terminal of single-chip microcontroller, and SMS module is connect with single-chip microcontroller for sending warning message when zero curve disconnects；Earthing switch, the earthing switch connect single-chip microcontroller, and according to the driving signal that single-chip microcontroller issues, earthing switch movement is to automatically engage temporary ground wire.After the protective device is by detecting that substantial deviation occurs for system zero-line failure voltage; odd-job ground line is devoted oneself to work; ensure that phase line and temporary ground wire constitute circuit; avoid after neutral line break voltage increase or reduce caused by burn electrical equipment; the platform area of neutral line break occurs for SMS module action notice staff simultaneously, so that staff rushes towards onsite lookup and handling failure in time.
Description
Technical field
The present invention relates to power distribution network correlative technology fields, and in particular to a kind of zero line break protection device and method.
Background technique
With the fast development of county economy society, electricity needs growth trend was powerful in recent years, and some areas electricity consumption increases
Speed is constantly speeded, and Corporation system distribution network reliability faces new challenges.Low-voltage network route is numerous, equipment class
The different and substantial amounts of type level, be easy to cause low-voltage network occurs because of itself or external cause during day-to-day operation therefore
Barrier.In power distribution network operation, neutral line break failure happens occasionally, and involves a wide range of knowledge, and brings huge damage to production, the life of user
It loses, customer responsiveness is strong, if dealing with improperly, company will face the damage such as responsibility judgment, electricity volume sold, economic compensation, social image
It loses, enterprise and customer relationship are nervous, and social unstable factor increases, the prior good service water for affecting power supply enterprise
It is flat, seriously compromise the favorable image of power supply enterprise.According to each power supply station, the base reflection in company area under one's jurisdiction, in recent years, town and country are combined
There is 400V low-voltage network failure off zero often in portion and rural area, and large area electricity consumption consumer electronics equipment is caused directly to be burnt
Or the indirect Frequent Accidents caused, cause serious economic loss and undesirable social influence.
In three-phase four-wire low-voltage power supply system, the zero curve in system can guarantee the phase voltage holding pair of three-phase load
Claim.But encounter neutral line break (such as strong wind scrape line, vehicle collision electric pole or bracing wire off zero cause zero curve dragged it is disconnected, operate against regulations
Construction machinery causes zero curve to be hung up, zero curve is stolen robbery and cuts) after, in three-phase load unbalance, neutral point will be displaced,
So that the three-phase voltage after breakpoint is changed, cause three-phase voltage asymmetry, heavy load phase voltage reduces, light load phase voltage
It increases and causes the phase partial electric equipment burnout, and after this part electrical equipment is out of service, the phase load is lighter, phase voltage
It is higher, such vicious circle, until the phase load is all burnt or out of service.Meanwhile electrical equipment on rear side of zero line break point
When body leakage, it is equivalent to band phase voltage, once these electrical appliance enclosures of human contact, will occur electric shock accidents.Low pressure
The phenomenon that power network line is complicated, and branched line and connector are more, and there are rupture of line or poor contacts, additionally there are frequent hairs
Raw conducting wire is tampered phenomenon.
Problem above shows that the characteristics of such failure is one to be sudden, and two is can not restore automatically.The research mesh of achievement
Have to comply with this two o'clock, it is sudden be required to monitoring in 24 hours is uninterrupted, protection act must be timely, can not restore automatically
Manual intervention must be waited after claimed movement, avoid expanding the state of affairs.In view of off zero in three-phase four-wire low-voltage distribution system
The concealment and harmfulness of failure, in order to improve the reliability of power supply, it is ensured that the safety of electrical equipment and personnel, it is necessary to deeply grind
Study carefully and reduces low-pressure system accident harm off zero and its reply safeguard measure.
Summary of the invention
The present invention provides a kind of zero line break protection device and method, and to overcome the deficiencies of existing technologies, the present invention passes through
After detecting that substantial deviation occurs for system zero-line failure voltage, odd-job ground line is devoted oneself to work, it is ensured that phase line and temporary ground wire
Constitute circuit, avoid after neutral line break voltage increase or reduce caused by burn electrical equipment.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of zero line break protection device, including power module, acquisition control module and earthing switch；The power supply mould
Block is used to be changed into external three phase mains after 5V voltage and power for acquisition control module；The acquisition control module includes voltage
Acquisition Circuit, single-chip microcontroller and SMS module, after wherein voltage collection circuit is connect with external three-phase input power supply with single-chip microcontroller
Input terminal connection, single-chip microcontroller judge whether zero curve disconnects according to the signal of voltage collection circuit, SMS module by it is serial always
Line is connect with single-chip microcontroller, and the SMS module is used to send warning message when zero curve disconnects；The earthing switch connects monolithic
Machine, according to the driving signal that single-chip microcontroller issues, earthing switch movement is to automatically engage temporary ground wire.
Further, the power module includes JY-3A10W-24C module and 7805 modules, and external three phase mains is through JY-
After 3A10W-24C block transforms are at 24V, then 5V voltage is converted by 7805 modules and is powered for acquisition control module.
Further, the voltage collection circuit includes capacitor, transformer, resistance and operational amplifier, external three-phase electricity
Each phase line in source passes through capacitor and connect with the primary side of the transformer, the secondary side of transformer after resistance with operational amplifier
Input terminal connection, the A/D input terminal of the input terminal of the operational amplifier and single-chip microcontroller connects；When three-phase and four-line low-voltage circuit
When middle zero curve disconnects, the Sasser of a transient process is generated in route, single-chip microcontroller can judge zero curve according to this feature
Whether really disconnect.
Further, the SMS module uses M72D module, and the SMS module is triggered when zero curve disconnects and sends alarm
Intelligent terminal of the information to external management personnel.
Further, the earthing switch uses bistable permanent magnetic earthing switch.
Further, the power module is connected by the three-phase power line in cable socket and three-phase and four-line low-voltage circuit
It connects.
Further, the high current conducting wire of earthing switch input terminal is connected to busbar, the busbar and three-phase and four-line low pressure
Zero curve connection in route, and busbar is mounted on conductive seat by wall bushing；The high current of earthing switch output end is led
Line passes through crimping screw connection on conductive seat, and conductive seat is connected to temporary ground wire by grounding screw.
External three phase mains is changed into after 5V voltage as acquisition control mould by a kind of neutral line break guard method, power module
Block power supply, single-chip microcontroller judge whether zero curve disconnects according to the signal of voltage collection circuit, are to connect when single-chip microcontroller receives trigger signal
When earth fault, pulse signal is issued to earthing switch, earthing switch closes a floodgate, and makes zero curve and temporary ground wire after corresponding contact conducting
Connection, as interim zero curve, while SMS module sends warning message when zero curve disconnects, and triggers after Failure elimination off zero single
Piece machine issues pulse signal, grounding switch tripping to earthing switch.
Compared with prior art, the invention has the following beneficial technical effects:
When the present invention utilizes neutral line break failure, each phase voltage imbalance and voltage as caused by threephase load imbalance
Oscillation forms Protection criteria, after accurate Judging fault, automatically engages odd-job ground line, odd-job is grounded and makes three-phase
Voltage kept in balance guarantees that user equipment works normally with this；Simultaneously in a manner of short message, fault message is sent to
On the mobile phone of associated maintenance route personnel, reminds maintenance personnel to search fault point and guarantee the safety of user to debug as early as possible
Property and improve power supply reliability.
After apparatus of the present invention are carried out practical application, the electric appliance that can reduce Electricity customers first burns, appliance fire, people
The possibility occurrence of body electric shock accidents reduces the risk of complaint, improves the reliability of power supply.Secondly it is shortened after installing and robs equating
Equal duration, by original 2 hours 45 minutes shortened till now, it is ensured that while power supply reliability, be connected in power supply enterprise's band
Carry out economic benefit.Finally accurately warranty failure point is provided for electric power first-aid personnel.The use of protective device of the present invention, Neng Gouji
When prevent harm off zero, protect ustomer premises access equipment not to be burned out, avoid generation electric shock accidents, not only increase power supply
The safety management level of enterprise, promotes customer satisfaction constantly, ensure that good service, while also imitates power supply enterprise's economy
Benefit gets bumper harvests with social benefit.
Detailed description of the invention
Fig. 1 is control principle drawing of the present invention；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is acquisition control module schematic diagram of the present invention；
Fig. 4 is earthing switch schematic diagram of the present invention.
Wherein: 10, power module；20, acquisition control module；30, earthing switch；40, crimping screw；50, high current is led
Line；60, wall bushing；70, busbar；80, cable socket；90, conductive seat；100, grounding screw.
Specific embodiment
To further illustrate the technical scheme of the present invention with reference to the accompanying drawing.
A kind of zero line break protection device, comprising:
Power module 10, the power module 10 are used to be changed into external three phase mains after 5V voltage as acquisition control mould
Block 20 is powered；The power module 10 includes JY-3A10W-24C module and 7805 modules, and external three phase mains is through JY-3A10W-
After 24C block transforms are at 24V, then 5V voltage is converted by 7805 modules and is powered for acquisition control module 20；
Acquisition control module 20, the acquisition control module 20 include voltage collection circuit, single-chip microcontroller and SMS module,
Middle voltage collection circuit is connect after connecting with external three-phase input power supply with the input terminal of single-chip microcontroller, and single-chip microcontroller is adopted according to voltage
The signal of collector judges whether zero curve disconnects, and SMS module is connect with single-chip microcontroller for when zero curve disconnects by universal serial bus
Send warning message.
The voltage collection circuit includes capacitor, transformer, resistance and operational amplifier, each phase of external three phase mains
The primary side that line passes through transformer described in capacitor one connects, the input after the secondary border resistance of transformer with the operational amplifier
End connection, the input terminal of the operational amplifier are connect with the A/D input terminal of the single-chip microcontroller；Zero in three-phase and four-line low-voltage circuit
When line disconnects, generate the Sasser of a transient process in route, single-chip microcontroller according to this feature, can determine whether out whether zero curve real
It disconnects；The SMS module uses M72D module, and zero curve triggers the SMS module and sends warning message to external management when disconnecting
The intelligent terminal of personnel.
Earthing switch 30, the earthing switch 30 connect single-chip microcontroller, according to the driving signal that single-chip microcontroller issues, earthing switch
To automatically engage temporary ground wire, the earthing switch 30 uses bistable permanent magnetic earthing switch for 30 movements.
Single-chip microcontroller receive trigger signal be ground fault when, to earthing switch issue pulse signal, earthing switch close a floodgate, it is right
Its zero curve and the ground of outside are connect by wall bushing busbar and conductive soleplate after answering contact to be connected, as interim zero curve, when
Single-chip microcontroller is triggered after Failure elimination off zero issues pulse signal, grounding switch tripping to earthing switch.
In the following with reference to the drawings and specific embodiments, the invention will be further described.It should be understood that these embodiments are only used for
Illustrate the present invention rather than limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, this
Field technical staff can make various changes or modifications the present invention, and such equivalent forms equally fall within model defined by the present invention
It encloses.
As shown in figures 1-4, in power module 10 used in the present invention, in order to improve zero line break protection device
Reliability, when avoiding being disconnected because of a certain phase line as power supply, the defect for causing earthing switch 30 to be failure to actuate, power module
10 include JY-3A10W-24C module and 7805 modules, external three phase mains after JY-3A10W-24C block transforms are at 24V, then
Being converted into 5V voltage by 7805 modules is acquisition control module 20, and external three phase mains, which disconnects any phase or two-phase, not to be influenced
Its work.It is control after block transforms because being all in the prior art, using the phase line of a certain phase and zero curve as external input
Module for power supply, in this way wherein also breaking to a phase line while route is destroyed by external force, disconnects zero curve, if this phase line
Precisely as if power supply, at this moment earthing switch may can be failure to actuate, and equipment is made not have effect.
Acquisition control module 20 includes voltage collection circuit, single-chip microcontroller and SMS module, voltage collection circuit and outside
It is connect after the connection of three-phase input power supply with the input terminal of single-chip microcontroller, SMS module is connect by universal serial bus with single-chip microcontroller.
Voltage collection circuit includes capacitor, transformer, resistance and operational amplifier, as shown in figure 3, external power supply is each
Phase line passes through capacitor and connect with the primary side of the transformer, and the secondary side of transformer is defeated with the operational amplifier after resistance
Enter end connection, the output end of the operational amplifier is connect with the A/D input terminal of the single-chip microcontroller；When zero curve disconnects, three-phase four
When zero curve disconnects in line low-voltage circuit, generate the Sasser of a transient process in route, single-chip microcontroller according to this feature, can determine whether
Whether zero curve really disconnects out, and after detecting that zero curve disconnects, issuing driving signal acts earthing switch 30, to automatically engage
Temporary ground wire ensures the security appliance of user.
SMS module then uses M72D module.In application, also triggering the SMS module simultaneously when zero curve disconnects and sending report
Alert information is handled on the intelligent terminal of external management personnel convenient for administrative staff in time.
Earthing switch 30 of the invention uses bistable permanent magnetic earthing switch, as shown in figure 4, in application, single-chip microcontroller receives
When trigger signal is ground fault, go out pulse signal to 5 human hair combing wastes of earthing switch 30, earthing switch 30 closes a floodgate, zero curve and the earth
It connects；Single-chip microcontroller is triggered after Failure elimination off zero goes out pulse signal, 30 separating brake of earthing switch to 7 human hair combing wastes of earthing switch 30；
6 feet of earthing switch 30 are the common ground end of its coil power, and 1 foot and 3 feet of earthing switch 30,2 feet and 4 feet are movement touching
Point makes its zero curve and external grounding connection by busbar 70 in wall bushing 60 and conductive soleplate 90 after the conducting of contact, as facing
When zero curve, so that three-phase voltage is reached in a basic balance, user's voltage guarantees the normal fortune of equipment in electrical equipment rated range
Row and the further development for preventing accident.
Protective device of the invention application first is that reduce Electricity customers electric appliance burn, appliance fire, the person electric shock thing
Therefore possibility occurrence, reduce the risk of complaint, improve the reliability of power supply.Second is that shortening repairing after installation zero curve protector
Average duration, by original 2 hours 45 minutes shortened till now, it is ensured that while power supply reliability, be connected in power supply enterprise
Bring economic benefit.Third is that providing accurately warranty failure point for electric power first-aid personnel.The use of the protective device, can be timely
Harm off zero is prevented, ustomer premises access equipment is protected not to be burned out, avoids generation electric shock accidents, not only increases power supply enterprise
The safety management level of industry, promotes customer satisfaction constantly, ensure that good service, while also making power supply enterprise's economic benefit
It gets bumper harvests with social benefit.
Claims (8)
1. a kind of zero line break protection device, which is characterized in that including power module (10), acquisition control module (20) and connect
Ground switchs (30)；The power module (10) is used to be changed into external three phase mains after 5V voltage as acquisition control module (20)
Power supply；The acquisition control module (20) includes voltage collection circuit, single-chip microcontroller and SMS module, wherein voltage collection circuit with
It is connect after external three-phase input power supply connection with the input terminal of single-chip microcontroller, single-chip microcontroller judges according to the signal of voltage collection circuit
Whether zero curve disconnects, and SMS module is connect by universal serial bus with single-chip microcontroller, and the SMS module is used to send out when zero curve disconnects
Send warning message；The earthing switch (30) connects single-chip microcontroller, and according to the driving signal that single-chip microcontroller issues, earthing switch (30) is dynamic
Make to automatically engage temporary ground wire.
2. a kind of zero line break protection device according to claim 1, which is characterized in that the power module (10) includes
JY-3A10W-24C module and 7805 modules, external three phase mains is after JY-3A10W-24C block transforms are at 24V, then passes through
7805 modules are converted into 5V voltage as acquisition control module (20) power supply.
3. a kind of zero line break protection device according to claim 2, which is characterized in that the voltage collection circuit includes
Capacitor, transformer, resistance and operational amplifier, each phase line of external three phase mains pass through the original of capacitor Yu the transformer
Side connection, the secondary side of transformer connect after resistance with the input terminal of operational amplifier, the input terminal of the operational amplifier and
The A/D input terminal of single-chip microcontroller connects；When zero curve disconnects in three-phase and four-line low-voltage circuit, a transient process is generated in route
Sasser, single-chip microcontroller can judge whether zero curve really disconnects according to this feature.
4. a kind of zero line break protection device according to claim 1, which is characterized in that the SMS module uses M72D
Module triggers the SMS module when zero curve disconnects and sends warning message to the intelligent terminal of external management personnel.
5. a kind of zero line break protection device according to claim 1, which is characterized in that the earthing switch (30) uses
Bistable permanent magnetic earthing switch.
6. a kind of zero line break protection device according to claim 1, which is characterized in that the power module (10) passes through
Cable socket (80) is connect with the three-phase power line in three-phase and four-line low-voltage circuit.
7. a kind of zero line break protection device according to claim 1, which is characterized in that earthing switch (30) input terminal
High current conducting wire (50) is connected to busbar (70), and the busbar (70) connect with the zero curve in three-phase and four-line low-voltage circuit, and female
Row (70) is mounted on conductive seat (90) by wall bushing (60)；The high current conducting wire (50) of earthing switch (30) output end
It is connected on conductive seat (90) by crimping screw (40), and conductive seat (90) is connected to by grounding screw (100) and is faced
When be grounded.
8. a kind of neutral line break guard method, using a kind of described in any item zero line break protection devices of claim 1-7,
It is characterized in that, external three phase mains is changed into after 5V voltage by power module (10) powers for acquisition control module (20), monolithic
Machine judges whether zero curve disconnects according to the signal of voltage collection circuit, when it is ground fault that single-chip microcontroller, which receives trigger signal, to
Earthing switch (30) issues pulse signal, and earthing switch (30) closes a floodgate, and connects zero curve and temporary ground wire after corresponding contact conducting
It connects, as interim zero curve, while SMS module sends warning message when zero curve disconnects, and triggers monolithic after Failure elimination off zero
Machine issues pulse signal, earthing switch (30) separating brake to earthing switch (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910228785.0A CN109802410A (en) | 2019-03-25 | 2019-03-25 | A kind of zero line break protection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910228785.0A CN109802410A (en) | 2019-03-25 | 2019-03-25 | A kind of zero line break protection device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109802410A true CN109802410A (en) | 2019-05-24 |
Family
ID=66563227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910228785.0A Pending CN109802410A (en) | 2019-03-25 | 2019-03-25 | A kind of zero line break protection device and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109802410A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113067044A (en) * | 2021-03-24 | 2021-07-02 | 湖北亿纬动力有限公司 | Anti-theft battery, electric equipment and anti-theft method |
| CN113777532A (en) * | 2021-11-10 | 2021-12-10 | 武汉中电国为技术有限公司 | System, method and device for recognizing zero-line and phase-loss of power secondary equipment side |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208508506U (en) * | 2018-08-10 | 2019-02-15 | 河北卓尔电气有限公司 | A kind of low pressure protector for null line breaking |
-
2019
- 2019-03-25 CN CN201910228785.0A patent/CN109802410A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208508506U (en) * | 2018-08-10 | 2019-02-15 | 河北卓尔电气有限公司 | A kind of low pressure protector for null line breaking |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113067044A (en) * | 2021-03-24 | 2021-07-02 | 湖北亿纬动力有限公司 | Anti-theft battery, electric equipment and anti-theft method |
| CN113777532A (en) * | 2021-11-10 | 2021-12-10 | 武汉中电国为技术有限公司 | System, method and device for recognizing zero-line and phase-loss of power secondary equipment side |
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Application publication date: 20190524 |