CN107741552A - 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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- CN107741552A CN107741552A CN201710908571.9A CN201710908571A CN107741552A CN 107741552 A CN107741552 A CN 107741552A CN 201710908571 A CN201710908571 A CN 201710908571A CN 107741552 A CN107741552 A CN 107741552A
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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 the phenomenon of tripping operation power-off does not occur when any wire is grounded in short-term in network system three-phase wire and zero line；When triggering 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 detect simultaneously timely processing dependent failure, if not eliminating failure within a certain period of time; the intelligent apparatus will send trip command automatically, protect network system；The device only detects whether any wire in power network three-phase wire and zero line is grounded by the curent change between power network earth 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, can be avoided
The Frequent trip event that the occurs when object such as branch contacts power network caused by the external environments such as wind and rain, so as to eliminate because weather because
Large area blackout caused by element, reduce because of the economic loss brought of frequently having a power failure；People ought particularly occur and stand on the ground mistake
During the extreme case of tactile 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 network
Whether any wire is grounded in curent change detection power network three-phase wire and zero line between ground terminal and ground, is easily installed.Cause
This, the invention 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 " during 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, and the mankind are hence into " when electric
Generation ".The appearance of electricity largely changes the life style of the mankind, if can be correctly using electricity.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
Because of fire and personnel or the animal injures and deaths of personnel or animal caused by false touch and power network in life caused by power network live wire 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 occurring the phenomenon leaked electricity in power network, 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, and huge work load is not only brought to power system,
And the normal production and life of periphery personnel can be had a strong impact on.
The content of the invention
The purpose of the present invention is that effective fire wall over the ground is built between power network and ground, is avoided because of external environments such as wind and rain
The objects such as caused branch contact the Frequent trip event occurred during power network, stop so as to eliminate the large area caused by weather conditions
Electrification, reduce because of the economic loss brought of frequently having a power failure；It is easy to power network to realize service without power-off；People station ought particularly occur to exist
During the extreme case of any one phase electric wire of ground false touch, 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 detection 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：Described low-frequency choke coil
（11）It is serially connected between power network earth terminal and power network ground wire, by the curent change in induction coil, lifts choke coil both ends
Voltage, the change of electric current is hindered, avoid power network from producing the current value of super level of security in being grounded；Described phase-zero/do over the ground
Disturb detection modulate circuit（12）Change in low-frequency choke coil is sensed by coiled wire-wound coil, produces induced voltage, and carry out signal
Conditioning, is exported to analog-digital converter（13）；Described analog-digital converter（13）By phase-zero/interference to ground detection modulate circuit
（12）The analog signal of output is converted to data signal, and exports to controller（14）；Described controller（14）Modulus is turned
Parallel operation（13）The data 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, and output control signal is to circuit breaker control circuit（15）, audible alarm circuit（16）, light warning circuit
（17）With GSM message remote alarms circuit (18)；Described breaking control circuit（15）Realize the power network after delay certain 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 network；Described lightning protection device（31）Be serially connected in power network earth terminal and
Between power network ground wire, prevent equipment from being damaged because of thunderbolt.
Preferably, fire wall also includes a kind of described intelligent grid over the ground：For induced voltage and nursed one's health phase-
Zero/interference to ground detects modulate circuit（12）, described phase-zero/interference to ground detection modulate circuit（12）It is a voltage sense
Modulate circuit should be detected, the change in low-frequency choke coil is sensed by coiled wire-wound coil, produces 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 also includes a kind of described intelligent grid over the ground：For converting analog signals into digital letter
Number analog-digital converter（13）, described 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 data signal, exports to controller（14）.
Preferably, fire wall also includes a kind of described intelligent grid over the ground：For intelligent management, detection and decision-making
Controller（14）, described controller（14）It is an intelligent processing unit, can be realized by integrated chips such as single-chip microcomputer, PLC, it is right
Analog-digital converter（13）The data 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, and output control signal gives breaking control circuit（15）, audible alarm circuit（16）, light warning
Circuit（17）With GSM message remote alarms circuit (18).
Preferably, fire wall also includes a kind of described intelligent grid over the ground：Open circuit control for power network open circuit control
Circuit（15）, described breaking control circuit（15）It is into the relay by a time-delay mechanism and a relay group
Control terminal is controlled by time-delay mechanism, and closure/disconnection path is serially connected in power network trip(ping) circuit, realizes the electricity after delay certain time
Net trip operation.
Preferably, fire wall also includes a kind of described intelligent grid over the ground：Audible alarm for earth fault alarm
Circuit（16）, described audible alarm circuit（16）It is the sound-producing device of a high-decibel, when phase/ground and zero/ground occurs in power network
During short trouble, audible alarm is sent.
Preferably, fire wall also includes a kind of described intelligent grid over the ground：Light warning for earth fault alarm
Circuit（17）, described light warning circuit（17）It is a highlighted lighting fixture, when power network phase/ground occurs and zero/ground is short
During the failure of road, lamplight pointing is sent.
Preferably, fire wall also includes a kind of described intelligent grid over the ground：It is long-range for earth fault alarm GSM message
Warning circuit (18), described GSM message remote alarms circuit (18) are a short message sending platforms, when phase/ground occurs in power network
During with zero/ground short circuit failure, toward transmission warning message in presetting number and numbering can be set, be easy to positioning and the row of failure
Look into.
Preferably, fire wall also includes a kind of described intelligent grid over the ground：Rectification circuit for system power supply conversion
（21）, described rectification circuit（21）It is AC-DC friendship/straight conversion decompression circuit, phase voltage is transformed into system work
Low-voltage.
Preferably, fire wall also includes a kind of described intelligent grid over the ground：The lightning protection device anti-lightning strike for device（31）,
Described lightning protection device（31）It is a lightning protection device, is serially connected between power network earth terminal and power network ground wire, prevents equipment because of thunderbolt
And damage.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation that the present invention uses four joint low-frequency choke coils
Fig. 3 is the structural representation that the present invention uses six joint low-frequency choke coils
Fig. 4 is the structural representation that the present invention uses eight joint low-frequency choke coils
Fig. 5 is the structural representation that the present invention uses ten joint low-frequency choke coils
Fig. 6 is a kind of power network connection diagram of the present invention.
Embodiment
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 representation of the present invention.
As shown in figure 1, a kind of intelligent grid fire wall over the ground, including：Maintained for power network earth terminal current limit and phase line voltage
Low-frequency choke coil（11）；For induced voltage and phase-zero/interference to ground detection modulate circuit nursed one's health（12）；For
Convert analog signals into the analog-digital converter of data signal（13）；For intelligent management, detection and the controller of decision-making
（14）；Breaking control circuit for power network 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, described low-frequency choke coil（11）It is a low frequency being serially connected between power network earth terminal and power network ground wire
Choke coil, by the curent change in induction coil, the voltage at lifting choke coil both ends, hinder the change of electric current.Low frequency chokes
Circle（11）Modulate circuit is detected by a mutual inductor and phase-zero/interference to ground（12）It is connected.
Preferably, described phase-zero/interference to ground detection modulate circuit（12）It is a voltage induced detection conditioning electricity
Road, the change in low-frequency choke coil is sensed by coiled wire-wound coil, produces 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 detection modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, described 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 data 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, described controller（14）It is an intelligent processing unit, can be real by integrated chips such as single-chip microcomputer, PLC
It is existing, to analog-digital converter（13）The data signal of input carries out logic analysis and judgement, and normal, phase line grounding and zero line are connect
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 network respectively
Break-make, sound and light alarm and long range positioning.
Preferably, described breaking control circuit（15）It is into should be after by a time-delay mechanism and a relay group
The control terminal of electrical equipment is controlled by time-delay mechanism, and closure/disconnection path is serially connected in power network trip(ping) circuit, realizes delay certain time
Power network trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, described audible alarm circuit（16）The sound-producing device of a high-decibel, when power network occur phase/ground and
During zero/ground short circuit failure, audible alarm is sent.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
Described light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power network
During failure, lamplight pointing is sent.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
Described GSM message remote alarms circuit (18) is a short message sending platform, when power network occur phase/ground and zero/
During ground short circuit failure, toward transmission warning message in presetting number and numbering can be set, be easy to positioning and the investigation of failure.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
Described rectification circuit（21）It is AC-DC friendship/straight conversion decompression circuit, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into by the available DC supply of control system by friendship/straight modular converter.
Described lightning protection device（31）It is a lightning protection device, is serially connected between power network earth terminal and power network ground wire, prevents from setting
It is standby to be damaged because of thunderbolt.
2 couples of present invention are described in detail using the structure of four joint low-frequency choke coils below in conjunction with the accompanying drawings.Refer to figure
2, Fig. 2 be the structural representation that the present invention uses four joint low-frequency choke coils.As shown in Fig. 2 a kind of intelligent grid is prevented fires over the ground
Wall, including：The four joint low-frequency choke coils maintained for power network earth terminal current limit and phase line voltage（11）；For sensing
Voltage and phase-zero/interference to ground detection modulate circuit nursed one's health（12）；For converting analog signals into data signal
Analog-digital converter（13）；For intelligent management, detection and the controller of decision-making（14）；Open circuit control for power network 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, described low-frequency choke coil（11）It is made up of, shares a main inductive windings and a secondary induction coil
Four joints, wherein 1. and 2. joint is the input and output joint of main inductive windings, the earth terminal and power network of power network are connected respectively
Ground；3. and 4. joint is the input and output joint of secondary induction coil in addition, with phase-zero/interference to ground detection modulate circuit
（12）It is connected.Main inductive windings are used for the change for hindering electric current, and secondary induction coil is used to monitor the electric current in main inductive windings
Change.
Preferably, described phase-zero/interference to ground detection modulate circuit（12）It is a voltage induced detection conditioning electricity
Road, the change in low-frequency choke coil is sensed by coiled wire-wound coil, produces 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 detection modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, described 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 data 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, described controller（14）It is an intelligent processing unit, can be real by integrated chips such as single-chip microcomputer, PLC
It is existing, to analog-digital converter（13）The data signal of input carries out logic analysis and judgement, and normal, phase line grounding and zero line are connect
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 network respectively
Break-make, sound and light alarm and long range positioning.
Preferably, described breaking control circuit（15）It is into should be after by a time-delay mechanism and a relay group
The control terminal of electrical equipment is controlled by time-delay mechanism, and closure/disconnection path is serially connected in power network trip(ping) circuit, realizes delay certain time
Power network trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, described audible alarm circuit（16）The sound-producing device of a high-decibel, when power network occur phase/ground and
During zero/ground short circuit failure, audible alarm is sent.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
Described light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power network
During failure, lamplight pointing is sent.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
Described GSM message remote alarms circuit (18) is a short message sending platform, when power network occur phase/ground and zero/
During ground short circuit failure, toward transmission warning message in presetting number and numbering can be set, be easy to positioning and the investigation of failure.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
Described rectification circuit（21）It is AC-DC friendship/straight conversion decompression circuit, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into by the available DC supply of control system by friendship/straight modular converter.
Described lightning protection device（31）It is a lightning protection device, is serially connected between power network earth terminal and power network ground wire, prevents from setting
It is standby to be damaged because of thunderbolt.
3 couples of present invention are described in detail using the structure of six joint low-frequency choke coils below in conjunction with the accompanying drawings.Refer to Fig. 3, Fig. 3
It is the structural representation that the present invention uses six joint low-frequency choke coils.As shown in figure 3, a kind of intelligent grid fire wall over the ground, bag
Include：The six joint low-frequency choke coils maintained for power network earth terminal current limit and phase line voltage（11）；For induced voltage
And the phase-zero nursed one's health/interference to ground detection modulate circuit（12）；For converting analog signals into the modulus of data signal
Converter（13）；For intelligent management, detection and the controller of decision-making（14）；Open circuit control electricity for power network open circuit control
Road（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 for
The anti-lightning strike lightning protection device of device（31）.
Preferably, six described joint low-frequency choke coils（11）It is a main inductive windings, a secondary induction coil and one
Individual temperature sensor composition, shares six joints, wherein 1. and 2. joint is the input and output joint of main inductive windings, connects respectively
The earth terminal and the ground of power network to get access to grid；3. 4. joint is the input and output joint of secondary induction coil, with phase-zero/do over the ground
Disturb detection modulate circuit（12）It is connected；5. 6. joint is temperature sensor input and output joint, directly and analog-digital converter
（13）It is connected.Main inductive windings are used for the change for hindering electric current, and secondary induction coil is used to monitor the electric current in main inductive windings
Change, temperature sensor are used to monitor low-frequency choke coil（11）In temperature value, be easy to compensate low-frequency choke coil（11）Because of temperature
Change and caused induced voltage value drift.
Preferably, described phase-zero/interference to ground detection modulate circuit（12）It is a voltage induced detection conditioning electricity
Road, the change in low-frequency choke coil is sensed by coiled wire-wound coil, produces 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 detection modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, described 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 data 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, described controller（14）It is an intelligent processing unit, can be real by integrated chips such as single-chip microcomputer, PLC
It is existing, to analog-digital converter（13）The data signal of input carries out logic analysis and judgement, and normal, phase line grounding and zero line are connect
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 network respectively
Break-make, sound and light alarm and long range positioning.
Preferably, described breaking control circuit（15）It is into should be after by a time-delay mechanism and a relay group
The control terminal of electrical equipment is controlled by time-delay mechanism, and closure/disconnection path is serially connected in power network trip(ping) circuit, realizes delay certain time
Power network trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, described audible alarm circuit（16）The sound-producing device of a high-decibel, when power network occur phase/ground and
During zero/ground short circuit failure, audible alarm is sent.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
Described light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power network
During failure, lamplight pointing is sent.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
Described GSM message remote alarms circuit (18) is a short message sending platform, when power network occur phase/ground and zero/
During ground short circuit failure, toward transmission warning message in presetting number and numbering can be set, be easy to positioning and the investigation of failure.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
Described rectification circuit（21）It is AC-DC friendship/straight conversion decompression circuit, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into by the available DC supply of control system by friendship/straight modular converter.
Described lightning protection device（31）It is a lightning protection device, is serially connected between power network earth terminal and power network ground wire, prevents from setting
It is standby to be damaged because of thunderbolt.
4 couples of present invention are described in detail using the structure of eight joint low-frequency choke coils below in conjunction with the accompanying drawings.Refer to Fig. 4, Fig. 4
It is the structural representation that the present invention uses eight joint low-frequency choke coils.As shown in figure 4, a kind of intelligent grid fire wall over the ground, bag
Include：The eight joint low-frequency choke coils maintained for power network earth terminal current limit and phase line voltage（11）；For induced voltage
And the phase-zero nursed one's health/interference to ground detection modulate circuit（12）；For converting analog signals into the modulus of data signal
Converter（13）；For intelligent management, detection and the controller of decision-making（14）；Open circuit control electricity for power network open circuit control
Road（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 for
The anti-lightning strike lightning protection device of device（31）.
Preferably, eight described joint low-frequency choke coils（11）It is by the main inductive windings and secondary induction coil of two groups of independence
Composition, shares eight joints, wherein 1., 2., 3. and 4. joint is respectively the input and output joint of two groups of main inductive windings, respectively
Connect the earth terminal of power network and the ground of power network；5., 6., 7. and 8. joint is respectively that the input and output of two groups of secondary induction coils connect
Head, with phase-zero/interference to ground detection modulate circuit（12）It is connected.Main inductive windings are used for the change for hindering electric current, pair sensing
Coil is used to monitor the curent change in main inductive windings.Because of low-frequency choke coil（11）Quality be directly connected to the reliable of equipment
Property, therefore system is carried out from monitoring by the way of double choke coils.Controller（14）Adjusted by phase-zero/interference to ground detection
Manage circuit（12）And analog-digital converter（13）The coil of two groups of independences is monitored in real time, when the information detected is inconsistent
When, self diagnosis low-frequency choke coil（11）Break down, improve the reliability of equipment.
Preferably, described phase-zero/interference to ground detection modulate circuit（12）It is a voltage induced detection conditioning electricity
Road, the change in low-frequency choke coil is sensed by coiled wire-wound coil, produces 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 detection modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, described 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 data 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, described controller（14）It is an intelligent processing unit, can be real by integrated chips such as single-chip microcomputer, PLC
It is existing, to analog-digital converter（13）The data signal of input carries out logic analysis and judgement, and normal, phase line grounding and zero line are connect
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 network respectively
Break-make, sound and light alarm and long range positioning.
Preferably, described breaking control circuit（15）It is into should be after by a time-delay mechanism and a relay group
The control terminal of electrical equipment is controlled by time-delay mechanism, and closure/disconnection path is serially connected in power network trip(ping) circuit, realizes delay certain time
Power network trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, described audible alarm circuit（16）The sound-producing device of a high-decibel, when power network occur phase/ground and
During zero/ground short circuit failure, audible alarm is sent.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
Described light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power network
During failure, lamplight pointing is sent.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
Described GSM message remote alarms circuit (18) is a short message sending platform, when power network occur phase/ground and zero/
During ground short circuit failure, toward transmission warning message in presetting number and numbering can be set, be easy to positioning and the investigation of failure.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
Described rectification circuit（21）It is AC-DC friendship/straight conversion decompression circuit, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into by the available DC supply of control system by friendship/straight modular converter.
Described lightning protection device（31）It is a lightning protection device, is serially connected between power network earth terminal and power network ground wire, prevents from setting
It is standby to be damaged because of thunderbolt.
5 couples of present invention are described in detail using the structure of ten joint low-frequency choke coils below in conjunction with the accompanying drawings.Refer to Fig. 5, Fig. 5
It is the structural representation that the present invention uses ten joint low-frequency choke coils.As shown in figure 5, a kind of intelligent grid fire wall over the ground, bag
Include：The ten joint low-frequency choke coils maintained for power network earth terminal current limit and phase line voltage（11）；For induced voltage
And the phase-zero nursed one's health/interference to ground detection modulate circuit（12）；For converting analog signals into the modulus of data signal
Converter（13）；For intelligent management, detection and the controller of decision-making（14）；Open circuit control electricity for power network open circuit control
Road（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 for
The anti-lightning strike lightning protection device of device（31）.
Preferably, ten described joint low-frequency choke coils（11）It is main inductive windings, the secondary induction coil by two groups of independence
And a temperature sensor composition, ten joints are shared, wherein 1., 2., 3. and 4. joint is respectively two groups of main inductive windings
Input and output joint, respectively connect power network earth terminal and power network ground；5., 6., 7. and 8. joint is respectively two groups of secondary senses
The input and output joint of coil is answered, with phase-zero/interference to ground detection modulate circuit（12）It is connected；9. 10. joint is temperature
Sensor input and output joint, directly and analog-digital converter（13）It is connected.Main inductive windings are used for the change for hindering 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 connected to equipment
Reliability, therefore just system is carried out from monitoring with the mode of double choke coils.Controller（14）Examined by phase-zero/interference to ground
Survey modulate circuit（12）And analog-digital converter（13）The coil of two groups of independences is monitored in real time, when the information detected differs
During cause, self diagnosis low-frequency choke coil（11）Break down.Temperature sensor is used to monitor low-frequency choke coil（11）In temperature value,
It is easy to compensate low-frequency choke coil（11）Induced voltage value drift caused by because of temperature change.
Preferably, described phase-zero/interference to ground detection modulate circuit（12）It is a voltage induced detection conditioning electricity
Road, the change in low-frequency choke coil is sensed by coiled wire-wound coil, produces 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 detection modulate circuit（12）Tune
Manage signal and analog-digital converter（13）Collection of simulant signal interface be connected.
Preferably, described 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 data 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, described controller（14）It is an intelligent processing unit, can be real by integrated chips such as single-chip microcomputer, PLC
It is existing, to analog-digital converter（13）The data signal of input carries out logic analysis and judgement, and normal, phase line grounding and zero line are connect
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 network respectively
Break-make, sound and light alarm and long range positioning.
Preferably, described breaking control circuit（15）It is into should be after by a time-delay mechanism and a relay group
The control terminal of electrical equipment is controlled by time-delay mechanism, and closure/disconnection path is serially connected in power network trip(ping) circuit, realizes delay certain time
Power network trip operation afterwards.Breaking control circuit（15）By controller（14）Complete control.
Preferably, described audible alarm circuit（16）The sound-producing device of a high-decibel, when power network occur phase/ground and
During zero/ground short circuit failure, audible alarm is sent.Audible alarm circuit（16）It is serially connected between power supply and ground, and by controller
（14）Complete control.
Described light warning circuit（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit occurs in power network
During failure, lamplight pointing is sent.Light warning circuit（17）It is serially connected between power supply and ground, and by controller（14）Complete control
System.
Described GSM message remote alarms circuit (18) is a short message sending platform, when power network occur phase/ground and zero/
During ground short circuit failure, toward transmission warning message in presetting number and numbering can be set, be easy to positioning and the investigation of failure.
GSM message remote alarms circuit (18) is by controller（14）Complete control.
Described rectification circuit（21）It is AC-DC friendship/straight conversion decompression circuit, phase voltage is transformed into system work
The low-voltage of work.Phase voltage is converted into by the available DC supply of control system by friendship/straight modular converter.
Described lightning protection device（31）It is a lightning protection device, is serially connected between power network earth terminal and power network ground wire, prevents from setting
It is standby to be damaged because of thunderbolt.
Fig. 6 is referred to, Fig. 6 is a kind of power network connection diagram of the present invention.Power transformer secondary 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 network.Work as people（Or thing
Body）When causing to occur between phase/ground short circuit situation, can fire wall 1 forms closed-loop path 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 accident such as on fire
Occur.Fire wall 1 can whether convergence be zero come in real time to intelligent grid of the present invention by detecting leakage current that its own flows through over the ground
Zero/ground short circuit state is monitored, when zero/ground short circuit accident occurs, the leakage current that intelligent grid is flowed through in fire wall 1 over the ground will become
Near is zero, and convergence is also zero by induced voltage of this intelligent grid over the ground in fire wall 1.
One embodiment of the present invention is the foregoing is only, is not intended to limit the scope of the invention, every profit
The equivalent structure or equivalent flow conversion made with description of the invention and accompanying drawing content, or directly or indirectly it is used 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：Low-frequency choke coil（11）, phase-zero/interference to ground detection 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：Described low-frequency choke coil
（11）It is serially connected between power network earth terminal and power network ground wire, by the curent change in induction coil, lifts choke coil both ends
Voltage, the change of electric current is hindered, avoid power network from producing the current value of super level of security in being grounded；Described phase-zero/do over the ground
Disturb detection modulate circuit（12）Change in low-frequency choke coil is sensed by coiled wire-wound coil, produces induced voltage, and carry out signal
Conditioning, is exported to analog-digital converter（13）；Described analog-digital converter（13）By phase-zero/interference to ground detection modulate circuit
（12）The analog signal of output is converted to data signal, and exports to controller（14）；Described controller（14）Modulus is turned
Parallel operation（13）The data 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, and output control signal is to circuit breaker control circuit（15）, audible alarm circuit（16）, light warning circuit
（17）With GSM message remote alarms circuit (18)；Described breaking control circuit（15）Realize the power network after delay certain 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 network；Described lightning protection device（31）Be serially connected in power network earth terminal and
Between power network ground wire, prevent equipment from being damaged because of thunderbolt.
A kind of 2. intelligent grid according to claim 1 fire wall over the ground, it is characterised in that described 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.
A kind of 3. intelligent grid according to claim 1 fire wall over the ground, it is characterised in that described controller（14）It is
Intelligent processing unit, it can be realized by integrated chips such as single-chip microcomputer, PLC.
A kind of 4. intelligent grid according to claim 1 fire wall over the ground, it is characterised in that described breaking control circuit
（15）By time-delay mechanism with relay group into the control terminal of the relay is controlled by time-delay mechanism, and closure/disconnection path is serially connected in
In power network trip(ping) circuit.
A kind of 5. intelligent grid according to claim 1 fire wall over the ground, it is characterised in that described 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 network, sends audible alarm.
A kind of 6. intelligent grid according to claim 1 fire wall over the ground, it is characterised in that described light warning circuit
（17）It is a highlighted lighting fixture, when phase/ground and zero/ground short circuit failure occurs in power network, sends lamplight pointing.
7. a kind of intelligent grid according to claim 1 fire wall over the ground, it is characterised in that described 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 network
Warning message is sent in number and is set and is numbered, is easy to positioning and the investigation of failure.
A kind of 8. intelligent grid according to claim 1 fire wall over the ground, it is characterised in that described rectification circuit（21）
It is AC-DC friendship/straight conversion decompression circuit, 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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| 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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| CN107741552B CN107741552B (en) | 2018-08-31 |
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Citations (4)
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|---|---|---|---|---|
| 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 |
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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 |
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| 姜盛东: "雷电防护系统接地线干扰抑制分析", 《科技创新导报》 * |
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| CN107741552B (en) | 2018-08-31 |
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