CN107741552B - A kind of intelligent grid fire wall over the ground - Google Patents
A kind of intelligent grid fire wall over the ground Download PDFInfo
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- CN107741552B CN107741552B CN201710908571.9A CN201710908571A CN107741552B CN 107741552 B CN107741552 B CN 107741552B CN 201710908571 A CN201710908571 A CN 201710908571A CN 107741552 B CN107741552 B CN 107741552B
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- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 13
- 230000001939 inductive effect Effects 0.000 claims description 20
- 238000004804 winding Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 230000006698 induction Effects 0.000 claims description 16
- 208000025274 Lightning injury Diseases 0.000 claims description 8
- 208000027418 Wounds and injury Diseases 0.000 claims description 8
- 230000003750 conditioning effect Effects 0.000 claims description 8
- 230000006837 decompression Effects 0.000 claims description 7
- 238000011835 investigation Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000004092 self-diagnosis Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 230000034994 death Effects 0.000 abstract description 4
- 231100000517 death Toxicity 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 4
- 230000001419 dependent effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 12
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- 238000004519 manufacturing process Methods 0.000 description 1
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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Abstract
A kind of intelligent grid fire wall over the ground; it is an intelligent grid earth protective device collectively constituted by analog element and digital element, including low-frequency choke coil, phase zero/interference to ground detection modulate circuit, analog-digital converter, controller, fuse trip circuit, audible alarm circuit and light warning circuit；Its advantage is that there is a phenomenon where trippings to power off when any wire is grounded in short-term in network system three-phase wire and zero curve；When causing human electric shock, the serious accident of personnel's electric shock injures and deaths does not occur；The device can pass through the Grounding of intelligent measurement phase/zero; and alarmed by way of acousto-optic, it can effectively inform that related personnel is detected simultaneously timely processing dependent failure, if not eliminating failure within a certain period of time; the intelligent apparatus will send out trip command automatically, protect network system；The device only detects whether any wire in power grid three-phase wire and zero curve is grounded by the curent change between power grid ground terminal and ground, is easily installed.
Description
Technical field
The present invention is an intelligent grid earth protective device collectively constituted by analog element and digital element, be can avoid
The Frequent trip event that the occurs when objects such as branch caused by the external environments such as wind and rain contact power grid, to eliminate because weather because
Large area blackout caused by element is reduced because of the economic loss brought that frequently has a power failure；People ought especially occur and stand on the ground mistake
When touching the extreme case of any one phase electric wire, the serious accident of personnel's electric shock injures and deaths does not occur；The device is only connect by power grid
Whether any wire is grounded in curent change detection power grid three-phase wire and zero curve between ground terminal and ground, is easily installed.Cause
This, which has relatively broad application background and important practical value.
Background technology
The sixties in 18th century, the mankind started the industrial revolution, and created huge productivity, and the mankind enter " when steam
Generation ".Mankind's social productive forces development once great leap again after more than 100 years.Current change is called " second of industry by people
Revolution ", electric light, phone used in today are all developed in current change, thus the mankind enter " when electrical
Generation ".The appearance of electricity largely changes the life style of the mankind, if electricity can be used correctly.Electricity will energetically be recommended
The development of human society.And it is once out of hand to electricity, it will similarly cause irremediable personnel and economic loss.Common
The injures and deaths of personnel or animal caused by fire and personnel or animal accidentally touch power grid in life caused by power grid firewire is grounded
It is a double-edged sword that accident, which all at every moment reminds people's electricity,.In order to make good use of electricity, people devise many devices and are used for electricity
It is managed, such as earth leakage protective device, once the phenomenon that leaking electricity in power grid, earth leakage protective device will be automatically cut off.But electric leakage is protected
Device is protected often because mistrip action occurs for the influence of external environment, not only brings huge work load to electric system,
And the normal production and life of periphery personnel can be seriously affected.
Invention content
The purpose of the present invention is building effective fire wall over the ground between power grid and ground, avoid because of external environments such as wind and rain
The objects such as caused branch contact the Frequent trip event occurred when power grid, stop to eliminate the large area caused by weather conditions
Electrification is reduced because of the economic loss brought that frequently has a power failure；Service without power-off is realized convenient for power grid；People station ought especially occur to exist
When accidentally touching the extreme case of any one phase electric wire on the ground, the serious accident of personnel's electric shock injures and deaths does not occur.
A kind of intelligent grid fire wall over the ground, including：Low-frequency choke coil（11）, phase-zero/interference to ground detect modulate circuit
（12）, analog-digital converter（13）, controller（14）, circuit breaker control circuit（15）, audible alarm circuit（16）, light warning electricity
Road（17）, GSM message remote alarms circuit（18）, rectification circuit（21）And lightning protection device（31）；Wherein：The low-frequency choke coil
（11）It is serially connected between power grid ground terminal and power grid ground wire, by the curent change in induction coil, promotes choke coil both ends
Voltage hinders the variation of electric current, and the current value of super level of security is generated in avoiding power grid from being grounded；The phase-zero/do over the ground
Disturb detection modulate circuit（12）Incude the variation in low-frequency choke coil by coiled wire-wound coil, generates induced voltage, and carry out signal
Conditioning is exported to analog-digital converter（13）；The analog-digital converter（13）Phase-zero/interference to ground is detected into modulate circuit
（12）The analog signal of output is converted to digital signal, and exports to controller（14）；The controller（14）Modulus is turned
Parallel operation（13）The digital signal of input carries out logic analysis and judgement, and to the complicated feelings such as normal, phase line grounding and zero line grounding
Condition carries out intelligent decision, exports control signal to circuit breaker control circuit（15）, audible alarm circuit（16）, light warning circuit
（17）With GSM message remote alarms circuit (18)；The breaking control circuit（15）Realize the power grid of delay after a certain period of time
Trip operation；The audible alarm circuit（16）, the light warning circuit（17）With the GSM message remote alarms circuit
(18) there is phase/ground and zero/ground short circuit failure alarm in power grid；The lightning protection device（31）Be serially connected in power grid ground terminal and
Between power grid ground wire, prevent equipment from being damaged because of lightning stroke.
Preferably, fire wall further includes a kind of intelligent grid over the ground：For induced voltage and the phase-that is improved
Zero/interference to ground detects modulate circuit（12）, the phase-zero/interference to ground detects modulate circuit（12）It is a voltage sense
Modulate circuit should be detected, the variation in low-frequency choke coil is incuded by coiled wire-wound coil, generates induced voltage, and pass through alternating current
Pressure-DC current or alternating voltage-DC voltage message transmitter carry out signal condition, export to analog-digital converter（13）.
Preferably, fire wall further includes a kind of intelligent grid over the ground：For converting analog signals into digital letter
Number analog-digital converter（13）, the analog-digital converter（13）It is a high-precision digital analog converter, by phase-zero/over the ground
Interference Detection modulate circuit（12）The analog signal of output is converted to digital signal, exports to controller（14）.
Preferably, fire wall further includes a kind of intelligent grid over the ground：For intelligent management, detection and decision
Controller（14）, the controller（14）It is an intelligent processing unit, can be realized by integrated chips such as microcontroller, PLC, it is right
Analog-digital converter（13）The digital signal of input carries out logic analysis and judgement, and to normal, phase line grounding and zero line grounding etc.
Complex situations carry out intelligent decision, export control signal to breaking control circuit（15）, audible alarm circuit（16）, light warning
Circuit（17）With GSM message remote alarms circuit (18).
Preferably, fire wall further includes a kind of intelligent grid over the ground：Open circuit control for power grid open circuit control
Circuit（15）, the breaking control circuit（15）It is to be made up of a time-delay mechanism and a relay, the relay
Control terminal is controlled by time-delay mechanism, and closure/disconnection access is serially connected in power grid trip(ping) circuit, realizes the electricity of delay after a certain period of time
Net trip operation.
Preferably, fire wall further includes a kind of intelligent grid over the ground：Audible alarm for earth fault alarm
Circuit（16）, the audible alarm circuit（16）It is the sound-producing device of a high-decibel, when phase/ground and zero/ground occurs in power grid
When short trouble, alarm is made a sound.
Preferably, fire wall further includes a kind of intelligent grid over the ground：Light warning for earth fault alarm
Circuit（17）, the light warning circuit（17）It is a highlighted lighting fixture, when power grid phase/ground occurs and zero/ground is short
When the failure of road, lamplight pointing is sent out.
Preferably, fire wall further includes a kind of intelligent grid over the ground：It is long-range for earth fault alarm GSM message
Warning circuit (18), the GSM message remote alarms circuit (18) are a short message sending platforms, when phase/ground occurs in power grid
When with zero/ground short circuit failure, warning message can be sent into presetting number and setting is numbered, the positioning convenient for failure and row
It looks into.
Preferably, fire wall further includes a kind of intelligent grid over the ground：Rectification circuit for system power supply conversion
（21）, the rectification circuit（21）It is friendship/straight conversion decompression circuit of an AC-DC, phase voltage is transformed into system work
Low-voltage.
Preferably, fire wall further includes a kind of intelligent grid over the ground：The lightning protection device anti-lightning strike for device（31）,
The lightning protection device（31）It is a lightning protection device, is serially connected between power grid ground terminal and power grid ground wire, prevents equipment because of lightning stroke
And it damages.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 is the structural schematic diagram that the present invention uses four connector low-frequency choke coils
Fig. 3 is the structural schematic diagram that the present invention uses six connector low-frequency choke coils
Fig. 4 is the structural schematic diagram that the present invention uses eight connector low-frequency choke coils
Fig. 5 is the structural schematic diagram that the present invention uses ten connector low-frequency choke coils
Fig. 6 is a kind of power grid connection diagram of the present invention.
Specific implementation mode
1 the present invention is described in detail below in conjunction with the accompanying drawings.Fig. 1 is referred to, Fig. 1 is the structural schematic diagram of the present invention.
As shown in Figure 1, a kind of intelligent grid fire wall over the ground, including：It is maintained for power grid ground terminal current limit and phase line voltage
Low-frequency choke coil（11）；For induced voltage and improved phase-zero/interference to ground detect modulate circuit（12）；For
Convert analog signals into the analog-digital converter of digital signal（13）；Controller for intelligent management, detection and decision
（14）；Breaking control circuit for power grid open circuit control（15）；Audible alarm circuit for earth fault alarm（16）；With
In the light warning circuit of earth fault alarm（17）；For earth fault alarm GSM message remote alarms circuit (18)；For
The rectification circuit of system power supply conversion（21）With the lightning protection device anti-lightning strike for device（31）.
Preferably, the low-frequency choke coil（11）It is a low frequency being serially connected between power grid ground terminal and power grid ground wire
Choke coil promotes the voltage at choke coil both ends, hinders the variation of electric current by the curent change in induction coil.Low frequency chokes
Circle（11）Modulate circuit is detected by a mutual inductor and phase-zero/interference to ground（12）It is connected.
Preferably, the phase-zero/interference to ground detects modulate circuit（12）It is a voltage induced detection conditioning electricity
Road incudes the variation in low-frequency choke coil by coiled wire-wound coil, generates induced voltage, and by alternating voltage-DC current or
Person's alternating voltage-DC voltage message transmitter carries out signal condition.Phase-zero/interference to ground detects modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, the analog-digital converter（13）It is a high-precision digital analog converter, by phase-zero/interference to ground
Detect modulate circuit（12）The analog signal of output is converted to digital signal.Analog-digital converter（13）Pass through bus and controller
（14）It is connected, the digital value of phase-zero/ground detection information is transferred to controller（14）Processing.
Preferably, the controller（14）It is an intelligent processing unit, it can be by the integrated chips such as microcontroller, PLC reality
It is existing, to analog-digital converter（13）The digital signal of input carries out logic analysis and judgement, and is connect to normal, phase line grounding and zero curve
The complex situations such as ground carry out intelligent decision.Controller（14）Pass through universal input and output port and breaking control circuit（15）, sound
Sound warning circuit（16）, light warning circuit（17）It is connected with GSM message remote alarms circuit (18), realizes power grid respectively
Break-make, sound-light alarm and long range positioning.
Preferably, the breaking control circuit（15）Be by a time-delay mechanism and relay composition, should be after
The control terminal of electric appliance is controlled by time-delay mechanism, and closure/disconnection access is serially connected in power grid trip(ping) circuit, realizes delay certain time
Power grid trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, the audible alarm circuit（16）The sound-producing device of a high-decibel, when power grid occur phase/ground and
When zero/ground short circuit failure, alarm is made a sound.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
The light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power grid
When failure, lamplight pointing is sent out.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
The GSM message remote alarms circuit (18) is a short message sending platform, when power grid occur phase/ground and zero/
When ground short circuit failure, warning message can be sent into presetting number and setting is numbered, the positioning convenient for failure and investigation.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
The rectification circuit（21）It is friendship/straight conversion decompression circuit of an AC-DC, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into the available DC supply of control system by friendship/straight conversion module.
The lightning protection device（31）It is a lightning protection device, is serially connected between power grid ground terminal and power grid ground wire, prevents from setting
It is standby to be damaged because of lightning stroke.
2 couples of present invention are described in detail using the structure of four connector low-frequency choke coils below in conjunction with the accompanying drawings.Refer to figure
2, Fig. 2 be the structural schematic diagram that the present invention uses four connector low-frequency choke coils.As shown in Fig. 2, a kind of intelligent grid is prevented fires over the ground
Wall, including：The four connector low-frequency choke coils maintained for power grid ground terminal current limit and phase line voltage（11）；For incuding
Voltage and phase-zero/interference to ground detection modulate circuit improved（12）；For converting analog signals into digital signal
Analog-digital converter（13）；Controller for intelligent management, detection and decision（14）；Open circuit control for power grid open circuit control
Circuit processed（15）；Audible alarm circuit for earth fault alarm（16）；Light warning circuit for earth fault alarm
（17）；For earth fault alarm GSM message remote alarms circuit (18)；Rectification circuit for system power supply conversion（21）With
The lightning protection device anti-lightning strike for device（31）.
Preferably, the low-frequency choke coil（11）It is made of, shares a main inductive windings and a secondary induction coil
Four connectors are separately connected the ground terminal and power grid of power grid wherein 1. and 2. connector is the input and output connector of main inductive windings
Ground；In addition 3. and 4. connector is the input and output connector of secondary induction coil, and modulate circuit is detected with phase-zero/interference to ground
（12）It is connected.Main inductive windings are used to hinder the variation of electric current, secondary induction coil to be used to monitor the electric current in main inductive windings
Variation.
Preferably, the phase-zero/interference to ground detects modulate circuit（12）It is a voltage induced detection conditioning electricity
Road incudes the variation in low-frequency choke coil by coiled wire-wound coil, generates induced voltage, and by alternating voltage-DC current or
Person's alternating voltage-DC voltage message transmitter carries out signal condition.Phase-zero/interference to ground detects modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, the analog-digital converter（13）It is a high-precision digital analog converter, by phase-zero/interference to ground
Detect modulate circuit（12）The analog signal of output is converted to digital signal.Analog-digital converter（13）Pass through bus and controller
（14）It is connected, the digital value of phase-zero/ground detection information is transferred to controller（14）Processing.
Preferably, the controller（14）It is an intelligent processing unit, it can be by the integrated chips such as microcontroller, PLC reality
It is existing, to analog-digital converter（13）The digital signal of input carries out logic analysis and judgement, and is connect to normal, phase line grounding and zero curve
The complex situations such as ground carry out intelligent decision.Controller（14）Pass through universal input and output port and breaking control circuit（15）, sound
Sound warning circuit（16）, light warning circuit（17）It is connected with GSM message remote alarms circuit (18), realizes power grid respectively
Break-make, sound-light alarm and long range positioning.
Preferably, the breaking control circuit（15）Be by a time-delay mechanism and relay composition, should be after
The control terminal of electric appliance is controlled by time-delay mechanism, and closure/disconnection access is serially connected in power grid trip(ping) circuit, realizes delay certain time
Power grid trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, the audible alarm circuit（16）The sound-producing device of a high-decibel, when power grid occur phase/ground and
When zero/ground short circuit failure, alarm is made a sound.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
The light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power grid
When failure, lamplight pointing is sent out.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
The GSM message remote alarms circuit (18) is a short message sending platform, when power grid occur phase/ground and zero/
When ground short circuit failure, warning message can be sent into presetting number and setting is numbered, the positioning convenient for failure and investigation.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
The rectification circuit（21）It is friendship/straight conversion decompression circuit of an AC-DC, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into the available DC supply of control system by friendship/straight conversion module.
The lightning protection device（31）It is a lightning protection device, is serially connected between power grid ground terminal and power grid ground wire, prevents from setting
It is standby to be damaged because of lightning stroke.
3 couples of present invention are described in detail using the structure of six connector low-frequency choke coils below in conjunction with the accompanying drawings.Refer to figure
3, Fig. 3 be the structural schematic diagram that the present invention uses six connector low-frequency choke coils.As shown in figure 3, a kind of intelligent grid is prevented fires over the ground
Wall, including：The six connector low-frequency choke coils maintained for power grid ground terminal current limit and phase line voltage（11）；For incuding
Voltage and phase-zero/interference to ground detection modulate circuit improved（12）；For converting analog signals into digital signal
Analog-digital converter（13）；Controller for intelligent management, detection and decision（14）；Open circuit control for power grid open circuit control
Circuit processed（15）；Audible alarm circuit for earth fault alarm（16）；Light warning circuit for earth fault alarm
（17）；For earth fault alarm GSM message remote alarms circuit (18)；Rectification circuit for system power supply conversion（21）With
The lightning protection device anti-lightning strike for device（31）.
Preferably, the six connector low-frequency choke coils（11）It is a main inductive windings, a secondary induction coil and one
A temperature sensor composition, there are six connectors altogether, wherein 1. and 2. connector is the input and output connector of main inductive windings, connect respectively
The ground of the ground terminal and power grid that get access to grid；3. 4. connector is the input and output connector of secondary induction coil, with phase-zero/do over the ground
Disturb detection modulate circuit（12）It is connected；5. 6. connector is temperature sensor input and output connector, directly and analog-digital converter
（13）It is connected.Main inductive windings are used to hinder the variation of electric current, secondary induction coil to be used to monitor the electric current in main inductive windings
Variation, temperature sensor is for monitoring low-frequency choke coil（11）In temperature value, convenient for compensation low-frequency choke coil（11）Because of temperature
The induced voltage value drift of variation and generation.
Preferably, the phase-zero/interference to ground detects modulate circuit（12）It is a voltage induced detection conditioning electricity
Road incudes the variation in low-frequency choke coil by coiled wire-wound coil, generates induced voltage, and by alternating voltage-DC current or
Person's alternating voltage-DC voltage message transmitter carries out signal condition.Phase-zero/interference to ground detects modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, the analog-digital converter（13）It is a high-precision digital analog converter, by phase-zero/interference to ground
Detect modulate circuit（12）And low-frequency choke coil（11）The analog signal of output is converted to digital signal.Analog-digital converter（13）It is logical
Cross bus and controller（14）It is connected, the digital value of phase-zero/ground detection information is transferred to controller（14）Processing.
Preferably, the controller（14）It is an intelligent processing unit, it can be by the integrated chips such as microcontroller, PLC reality
It is existing, to analog-digital converter（13）The digital signal of input carries out logic analysis and judgement, and is connect to normal, phase line grounding and zero curve
The complex situations such as ground carry out intelligent decision.Controller（14）Pass through universal input and output port and breaking control circuit（15）, sound
Sound warning circuit（16）, light warning circuit（17）It is connected with GSM message remote alarms circuit (18), realizes power grid respectively
Break-make, sound-light alarm and long range positioning.
Preferably, the breaking control circuit（15）Be by a time-delay mechanism and relay composition, should be after
The control terminal of electric appliance is controlled by time-delay mechanism, and closure/disconnection access is serially connected in power grid trip(ping) circuit, realizes delay certain time
Power grid trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, the audible alarm circuit（16）The sound-producing device of a high-decibel, when power grid occur phase/ground and
When zero/ground short circuit failure, alarm is made a sound.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
The light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power grid
When failure, lamplight pointing is sent out.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
The GSM message remote alarms circuit (18) is a short message sending platform, when power grid occur phase/ground and zero/
When ground short circuit failure, warning message can be sent into presetting number and setting is numbered, the positioning convenient for failure and investigation.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
The rectification circuit（21）It is friendship/straight conversion decompression circuit of an AC-DC, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into the available DC supply of control system by friendship/straight conversion module.
The lightning protection device（31）It is a lightning protection device, is serially connected between power grid ground terminal and power grid ground wire, prevents from setting
It is standby to be damaged because of lightning stroke.
4 couples of present invention are described in detail using the structure of eight connector low-frequency choke coils below in conjunction with the accompanying drawings.Refer to figure
4, Fig. 4 be the structural schematic diagram that the present invention uses eight connector low-frequency choke coils.As shown in figure 4, a kind of intelligent grid is prevented fires over the ground
Wall, including：The eight connector low-frequency choke coils maintained for power grid ground terminal current limit and phase line voltage（11）；For incuding
Voltage and phase-zero/interference to ground detection modulate circuit improved（12）；For converting analog signals into digital signal
Analog-digital converter（13）；Controller for intelligent management, detection and decision（14）；Open circuit control for power grid open circuit control
Circuit processed（15）；Audible alarm circuit for earth fault alarm（16）；Light warning circuit for earth fault alarm
（17）；For earth fault alarm GSM message remote alarms circuit (18)；Rectification circuit for system power supply conversion（21）With
The lightning protection device anti-lightning strike for device（31）.
Preferably, the eight connector low-frequency choke coils（11）It is by two groups of independent main inductive windings and secondary induction coil
Composition, shares eight connectors, wherein 1., 2., 3. and 4. connector is respectively the input and output connector of two groups of main inductive windings, respectively
Connect the ground of the ground terminal and power grid of power grid；5., 6., 7. and 8. connector is respectively that the input and output of two groups of secondary induction coils connect
Head detects modulate circuit with phase-zero/interference to ground（12）It is connected.Main inductive windings are used to hinder the variation of electric current, pair induction
Coil is used to monitor the curent change in main inductive windings.Because of low-frequency choke coil（11）Quality be directly related to the reliable of equipment
Property, therefore system is carried out from monitoring by the way of double choke coils.Controller（14）It is adjusted by phase-zero/interference to ground detection
Manage circuit（12）And analog-digital converter（13）Two groups of independent coils are monitored in real time, when the information detected is inconsistent
When, self diagnosis low-frequency choke coil（11）It breaks down, improves the reliability of equipment.
Preferably, the phase-zero/interference to ground detects modulate circuit（12）It is a voltage induced detection conditioning electricity
Road incudes the variation in low-frequency choke coil by coiled wire-wound coil, generates induced voltage, and by alternating voltage-DC current or
Person's alternating voltage-DC voltage message transmitter carries out signal condition.Phase-zero/interference to ground detects modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, the analog-digital converter（13）It is a high-precision digital analog converter, by phase-zero/interference to ground
Detect modulate circuit（12）The analog signal of output is converted to digital signal.Analog-digital converter（13）Pass through bus and controller
（14）It is connected, the digital value of phase-zero/ground detection information is transferred to controller（14）Processing.
Preferably, the controller（14）It is an intelligent processing unit, it can be by the integrated chips such as microcontroller, PLC reality
It is existing, to analog-digital converter（13）The digital signal of input carries out logic analysis and judgement, and is connect to normal, phase line grounding and zero curve
The complex situations such as ground carry out intelligent decision.Controller（14）Pass through universal input and output port and breaking control circuit（15）, sound
Sound warning circuit（16）, light warning circuit（17）It is connected with GSM message remote alarms circuit (18), realizes power grid respectively
Break-make, sound-light alarm and long range positioning.
Preferably, the breaking control circuit（15）Be by a time-delay mechanism and relay composition, should be after
The control terminal of electric appliance is controlled by time-delay mechanism, and closure/disconnection access is serially connected in power grid trip(ping) circuit, realizes delay certain time
Power grid trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, the audible alarm circuit（16）The sound-producing device of a high-decibel, when power grid occur phase/ground and
When zero/ground short circuit failure, alarm is made a sound.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
The light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power grid
When failure, lamplight pointing is sent out.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
The GSM message remote alarms circuit (18) is a short message sending platform, when power grid occur phase/ground and zero/
When ground short circuit failure, warning message can be sent into presetting number and setting is numbered, the positioning convenient for failure and investigation.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
The rectification circuit（21）It is friendship/straight conversion decompression circuit of an AC-DC, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into the available DC supply of control system by friendship/straight conversion module.
The lightning protection device（31）It is a lightning protection device, is serially connected between power grid ground terminal and power grid ground wire, prevents from setting
It is standby to be damaged because of lightning stroke.
5 couples of present invention are described in detail using the structure of ten connector low-frequency choke coils below in conjunction with the accompanying drawings.Refer to figure
5, Fig. 5 be the structural schematic diagram that the present invention uses ten connector low-frequency choke coils.As shown in figure 5, a kind of intelligent grid is prevented fires over the ground
Wall, including：The ten connector low-frequency choke coils maintained for power grid ground terminal current limit and phase line voltage（11）；For incuding
Voltage and phase-zero/interference to ground detection modulate circuit improved（12）；For converting analog signals into digital signal
Analog-digital converter（13）；Controller for intelligent management, detection and decision（14）；Open circuit control for power grid open circuit control
Circuit processed（15）；Audible alarm circuit for earth fault alarm（16）；Light warning circuit for earth fault alarm
（17）；For earth fault alarm GSM message remote alarms circuit (18)；Rectification circuit for system power supply conversion（21）With
The lightning protection device anti-lightning strike for device（31）.
Preferably, the ten connector low-frequency choke coils（11）It is by two groups of independent main inductive windings, secondary induction coils
And a temperature sensor composition, ten connectors are shared, wherein 1., 2., 3. and 4. connector is respectively two groups of main inductive windings
Input and output connector, be separately connected the ground terminal of power grid and the ground of power grid；5., 6., 7. and 8. connector is respectively two groups of pair senses
The input and output connector for answering coil detects modulate circuit with phase-zero/interference to ground（12）It is connected；9. 10. connector is temperature
Sensor input and output connector, directly and analog-digital converter（13）It is connected.Main inductive windings are used to hinder the variation of electric current, secondary
Induction coil is used to monitor the curent change in main inductive windings.Because of low-frequency choke coil（11）Quality be directly related to equipment
Reliability, therefore just system is carried out from monitoring with the mode of double choke coils.Controller（14）Pass through phase-zero/interference to ground inspection
Survey modulate circuit（12）And analog-digital converter（13）Two groups of independent coils are monitored in real time, when the information detected differs
When cause, self diagnosis low-frequency choke coil（11）It breaks down.Temperature sensor is for monitoring low-frequency choke coil（11）In temperature value,
Convenient for compensating low-frequency choke coil（11）The induced voltage value drift generated by temperature change.
Preferably, the phase-zero/interference to ground detects modulate circuit（12）It is a voltage induced detection conditioning electricity
Road incudes the variation in low-frequency choke coil by coiled wire-wound coil, generates induced voltage, and by alternating voltage-DC current or
Person's alternating voltage-DC voltage message transmitter carries out signal condition.Phase-zero/interference to ground detects modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, the analog-digital converter（13）It is a high-precision digital analog converter, by phase-zero/interference to ground
Detect modulate circuit（12）And low-frequency choke coil（11）The analog signal of output is converted to digital signal.Analog-digital converter（13）It is logical
Cross bus and controller（14）It is connected, the digital value of phase-zero/ground detection information is transferred to controller（14）Processing.
Preferably, the controller（14）It is an intelligent processing unit, it can be by the integrated chips such as microcontroller, PLC reality
It is existing, to analog-digital converter（13）The digital signal of input carries out logic analysis and judgement, and is connect to normal, phase line grounding and zero curve
The complex situations such as ground carry out intelligent decision.Controller（14）Pass through universal input and output port and breaking control circuit（15）, sound
Sound warning circuit（16）, light warning circuit（17）It is connected with GSM message remote alarms circuit (18), realizes power grid respectively
Break-make, sound-light alarm and long range positioning.
Preferably, the breaking control circuit（15）Be by a time-delay mechanism and relay composition, should be after
The control terminal of electric appliance is controlled by time-delay mechanism, and closure/disconnection access is serially connected in power grid trip(ping) circuit, realizes delay certain time
Power grid trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, the audible alarm circuit（16）The sound-producing device of a high-decibel, when power grid occur phase/ground and
When zero/ground short circuit failure, alarm is made a sound.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
The light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power grid
When failure, lamplight pointing is sent out.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
The GSM message remote alarms circuit (18) is a short message sending platform, when power grid occur phase/ground and zero/
When ground short circuit failure, warning message can be sent into presetting number and setting is numbered, the positioning convenient for failure and investigation.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
The rectification circuit（21）It is friendship/straight conversion decompression circuit of an AC-DC, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into the available DC supply of control system by friendship/straight conversion module.
The lightning protection device（31）It is a lightning protection device, is serially connected between power grid ground terminal and power grid ground wire, prevents from setting
It is standby to be damaged because of lightning stroke.
Fig. 6 is referred to, Fig. 6 is a kind of power grid connection diagram of the present invention.Power transformer pair side as shown in Figure 3
Intelligent grid of the present invention fire wall 1 over the ground is concatenated between the star connection neutral point 2 of side and the ground 3 of power grid.Work as people（Or object
Body）When leading to occur between phase/ground short circuit situation, can fire wall 1 forms closed circuit over the ground with intelligent grid, due to intelligent electricity
Fire wall 1 can effectively block electric current within safe range value to net over the ground, therefore can avoid getting an electric shock and the accidents such as on fire
Occur.Whether fire wall 1 can be approached by detecting the leakage current that its own is flowed through intelligent grid of the present invention over the ground is zero come in real time
Zero/ground short circuit state is monitored, when zero/ground short circuit accident occurs, the leakage current that intelligent grid flows through in fire wall 1 over the ground will become
Close is zero, and approach is also zero by induced voltage of this intelligent grid over the ground in fire wall 1.
The foregoing is merely one embodiment of the present invention, are not intended to limit the scope of the invention, every profit
The equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other phases
The technical field of pass, is included within the scope of the present invention.
Claims (8)
1. a kind of intelligent grid fire wall over the ground, including：Ten connector low-frequency choke coils（11）, the detection conditioning of phase-zero/interference to ground
Circuit（12）, analog-digital converter（13）, controller（14）, circuit breaker control circuit（15）, audible alarm circuit（16）, light report
Alert circuit（17）, GSM message remote alarms circuit（18）, rectification circuit（21）And lightning protection device（31）；Wherein：Ten connectors
Low-frequency choke coil（11）It is made of, shares two groups of independent main inductive windings, secondary induction coil and a temperature sensor
Ten connectors are separately connected power grid wherein 1., 2., 3. and 4. connector is respectively the input and output connector of two groups of main inductive windings
Ground terminal and power grid ground；5., 6., 7. and 8. connector is respectively the input and output connector of two groups of secondary induction coils, with phase-
Zero/interference to ground detects modulate circuit（12）It is connected；9. 10. connector is temperature sensor input and output connector, directly and mould
Number converter（13）It is connected, main inductive windings are used to hinder the variation of electric current, and secondary induction coil is for monitoring main inductive windings
In curent change, temperature sensor is for monitoring low-frequency choke coil（11）In temperature value, convenient for compensation low-frequency choke coil
（11）The induced voltage value drift generated by temperature change；The phase-zero/interference to ground detects modulate circuit（12）Pass through
Coiled wire-wound coil incudes the variation in low-frequency choke coil, generates induced voltage, and carry out signal condition, exports to analog-digital converter
（13）；The analog-digital converter（13）Phase-zero/interference to ground is detected into modulate circuit（12）The analog signal of output is converted to
Digital signal, and export to controller（14）；Controller（14）Modulate circuit is detected by phase-zero/interference to ground（12）And mould
Number converter（13）Two groups of independent coils are monitored in real time, when the information detected is inconsistent, self diagnosis low frequency is gripped
Stream circle（11）It breaks down；The controller（14）To analog-digital converter（13）The digital signal of input carry out logic analysis and
Judge, and intelligent decision, controller are carried out to normal, phase line grounding and zero line grounding（14）It exports control signal and gives breaker control
Circuit processed（15）, audible alarm circuit（16）, light warning circuit（17）With GSM message remote alarms circuit (18)；Described
Breaking control circuit（15）Realize the power grid trip operation of delay after a certain period of time；The audible alarm circuit（16）, the lamp
Optical alarm circuit（17）With the GSM message remote alarms circuit (18) when phase/ground and zero/ground short circuit failure occurs in power grid
Alarm；The lightning protection device（31）It is serially connected between power grid ground terminal and power grid ground wire, prevents equipment from being damaged because of lightning stroke.
2. a kind of intelligent grid according to claim 1 fire wall over the ground, which is characterized in that the phase-zero/do over the ground
Disturb detection modulate circuit（12）Letter is carried out by alternating voltage-DC current or alternating voltage-DC voltage message transmitter
Number conditioning.
3. a kind of intelligent grid according to claim 1 fire wall over the ground, which is characterized in that the controller（14）It is
Intelligent processing unit can be realized by microcontroller, PLC.
4. a kind of intelligent grid according to claim 1 fire wall over the ground, which is characterized in that the breaking control circuit
（15）It is made of time-delay mechanism and relay, the control terminal of the relay is controlled by time-delay mechanism, and closure/disconnection access is serially connected in
In power grid trip(ping) circuit.
5. a kind of intelligent grid according to claim 1 fire wall over the ground, which is characterized in that the audible alarm circuit
（16）It is the sound-producing device of a high-decibel, when phase/ground and zero/ground short circuit failure occurs in power grid, makes a sound alarm.
6. a kind of intelligent grid according to claim 1 fire wall over the ground, which is characterized in that the light warning circuit
（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit failure occurs in power grid, sends out lamplight pointing.
7. a kind of intelligent grid according to claim 1 fire wall over the ground, which is characterized in that the GSM message is long-range
Warning circuit (18) is a short message sending platform, can be past presetting when phase/ground and zero/ground short circuit failure occurs in power grid
Warning message is sent in number and setting is numbered, the positioning convenient for failure and investigation.
8. a kind of intelligent grid according to claim 1 fire wall over the ground, which is characterized in that the rectification circuit（21）
It is friendship/straight conversion decompression circuit of an AC-DC, phase voltage is transformed into the low-voltage of system work.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710908571.9A CN107741552B (en) | 2017-09-29 | 2017-09-29 | A kind of intelligent grid fire wall over the ground |
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| CN201710908571.9A CN107741552B (en) | 2017-09-29 | 2017-09-29 | A kind of intelligent grid fire wall over the ground |
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| CN107741552B true CN107741552B (en) | 2018-08-31 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2338902Y (en) * | 1998-03-18 | 1999-09-15 | 殷云鹏 | Multi-functional lightning protection power supply distribution box |
| CN1773800A (en) * | 2004-11-03 | 2006-05-17 | 肖光希 | Electric Shock protector |
| CN201796459U (en) * | 2010-09-19 | 2011-04-13 | 天津北方恒业电气技术有限公司 | Electric leakage and temperature monitoring detector |
| CN203895973U (en) * | 2014-06-24 | 2014-10-22 | 窦勇 | Surge protection box |
-
2017
- 2017-09-29 CN CN201710908571.9A patent/CN107741552B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2338902Y (en) * | 1998-03-18 | 1999-09-15 | 殷云鹏 | Multi-functional lightning protection power supply distribution box |
| CN1773800A (en) * | 2004-11-03 | 2006-05-17 | 肖光希 | Electric Shock protector |
| CN201796459U (en) * | 2010-09-19 | 2011-04-13 | 天津北方恒业电气技术有限公司 | Electric leakage and temperature monitoring detector |
| CN203895973U (en) * | 2014-06-24 | 2014-10-22 | 窦勇 | Surge protection box |
Non-Patent Citations (1)
| Title |
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| 雷电防护系统接地线干扰抑制分析;姜盛东;《科技创新导报》;20091231(第36期);正文第35-36、38页 * |
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| CN107741552A (en) | 2018-02-27 |
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