CN108663595A - A kind of real-time inspection and control method of electrical equipment grounding state - Google Patents
A kind of real-time inspection and control method of electrical equipment grounding state Download PDFInfo
- Publication number
- CN108663595A CN108663595A CN201810532393.9A CN201810532393A CN108663595A CN 108663595 A CN108663595 A CN 108663595A CN 201810532393 A CN201810532393 A CN 201810532393A CN 108663595 A CN108663595 A CN 108663595A
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- electrical equipment
- monitored
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- relay
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
Abstract
The invention discloses a kind of real-time inspection and control methods of electrical equipment grounding state, are related to the technical field of safety protection of electrical equipment.The monitoring device of the real-time inspection and control method is built in monitored electrical equipment, and it is installed between the power switch of monitored electrical equipment and monitored electrical equipment, when the ground wire broken string of monitored electrical equipment, when poor contact or non-wiring, grounding monitor output end feeds back a high level signal and gives microcontroller monitoring unit, and send out sound-light alarm, simultaneously, microcontroller monitoring unit makes the control actuating of relay, cut-out is monitored the current supply circuit of electrical equipment, it plays a protective role to monitoring device and monitored electrical equipment, it also avoids causing Personal Risk to testing crew.
Description
Technical field
The invention belongs to the technical field of safety protection of electrical equipment more particularly to a kind of realities of electrical equipment grounding state
When monitoring and control method.
Background technology
High-tension switch cabinet instrument for measuring partial discharge, for measuring the letter of the shelf depreciation in the switchgears such as substation, power plant
Number.Since site environment is complicated, charging equipment voltage class is high, the metal shell of instrument need to carry out protective grounding.If measuring
In the process, keep instrument ground bad due to being grounded insecure, ground wire broken string etc., then can cause Personal Risk to testing crew,
Equally also make measuring instrument fragile.
Currently, high-tension testing apparatus（Electrical equipment）Protective grounding state lack the monitoring of continuous effective, control means.
Based on this, the present invention proposes a kind of the real-time inspection and control method and monitoring device of electrical equipment grounding state, is not changing electricity
In the case of the original structure of gas equipment, function, to electrical equipment（Such as high-tension switch cabinet instrument for measuring partial discharge）Power supply
Circuit is improved, built-in monitoring device, realizes continuous monitoring to the ground state of electrical equipment, and can be certainly after monitoring exception
Dynamic circuit breaker electricity is realized and monitors and automatically power off control in real time to test apparatus protective grounding state, to the people of protection test personnel
Body is significant safely.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of real-time inspection and control method of electrical equipment grounding state.
The present invention is to solve above-mentioned technical problem by the following technical solutions：A kind of electrical equipment grounding state
Real-time inspection and control method, including following steps：
Step（1）Preoperation inspection：Monitored electrical equipment is electrically connected with 220V exchanges, is pressed on monitored electrical equipment
" self-test " button CS checks whether the acousto-optic warning unit of electrical equipment grounding state monitoring apparatus is normal, unclamped after normal " from
Inspection " button；
Step（2）Use operation：The ground terminal of monitored electrical equipment is connect with ground wire, opens the electricity for being monitored electrical equipment
Source switch SS is monitored electrical equipment and is in monitored state；
Step（3）Status monitoring：When the ground wire broken string of monitored electrical equipment, poor contact or non-wiring, electrically set
The grounding monitor output end of standby earthing condition monitor is high level, and the high level signal is fed back to microcontroller monitoring list
Member, control acousto-optic warning unit send out sound-light alarm, so that testing crew finds problem with grounding in time, handle, avoid early
It is monitored the damage of electrical equipment and Personal Risk is caused to testing crew；Meanwhile making the control actuating of relay, it disconnects monitored
The current supply circuit of electrical equipment, monitored electrical equipment lose power supply, achieve the purpose that automatically power off, to monitored electrical
Equipment and monitoring device play a protective role；
Step（4）As a result it verifies：Testing crew is monitored the ground wire situation of electrical equipment according to sound-light alarm inspection, to ground connection
Line problem is repaired；After the problem of ground wire is repaired, acousto-optic warning unit automatically resets, and subsequent testing crew disconnects monitored
The power supply of electrical equipment is again switched on the power supply of monitored electrical equipment, and it is in running order to be monitored electrical equipment.
Further, the electrical equipment grounding state monitoring apparatus is built in monitored electrical equipment, and accesses quilt
In the current supply circuit for monitoring electrical equipment, the self-test button setting of electrical equipment grounding state monitoring apparatus is electrically set monitored
On standby operation panel；Electrical equipment grounding state monitoring apparatus is arranged in the power switch for being monitored electrical equipment and is monitored
Between electrical equipment, when the power supply of electrical equipment grounding state monitoring apparatus disconnects, it is monitored the current supply circuit of electrical equipment
Also it disconnects, plays a protective role simultaneously to monitored electrical equipment and monitoring device.
Further, the step（4）In, the power switch for being monitored electrical equipment need to be manually opened, to ensure experiment
The safety of personnel.
Further, the electrical equipment grounding state monitoring apparatus includes self-test button CS, AC/DC converter, control
Relay, pressure unit, acousto-optic warning unit, microcontroller monitoring unit, sampling unit and photoelectric coupling circuit unit；
The self-test button CS is in parallel with the power switch SS of monitored electrical equipment, and one end after parallel connection is exchanged with 220V to be electrically connected
It connects, the other end is connect with the input terminal of AC/DC converters；The output end of the AC/DC converters respectively with control relay, drop
Press the input terminal connection of unit；The output end of the pressure unit is connect with the power end of microcontroller monitoring unit；The control
Relay is also connect with one end of sampling unit, and the other end of sampling unit is as grounding monitor output end；The two of sampling unit
End is connect with the input terminal of the photoelectric coupling circuit unit；The output end of photoelectric coupling circuit unit is monitored with the microcontroller
Unit connects；The microcontroller monitoring unit is also connect with control relay, acousto-optic warning unit respectively.
Further, the control relay includes intermediate relay and signal relay；Intermediate relay has two pairs
Normally opened contact KA-1, KA-2 and coil KA, signal relay have a pair of normally-closed contact KS and coil KS；
The normally opened contact KA-1 of intermediate relay is arranged in self-test button CS and power switch SS in parallel and AC/DC converters
Between input terminal, one end of the normally opened contact KA-2 of intermediate relay and the normally-closed contact KS of signal relay respectively with AC/DC
The output end of converter connects, and the other end is connect with the coil KA of the coil KS of signal relay and signal relay respectively.
Further, the sampling unit is sample resistance, and the resistance value of the sample resistance is 40 ohm.
Further, the self-test button CS is button switch of the i.e. disconnected formula without self-locking；The self-test button CS, is used for
Whether ground state monitoring function and the sound and light of alarm for detecting monitoring device are normal；Self-test button CS and power switch SS is simultaneously
Connection connection, the two can not be closed at.
Further, the acousto-optic warning unit includes buzzer and indicator light.
Further, the microcontroller monitoring unit uses the singlechip chip of model STM32L151.
Compared with prior art, the real-time inspection and control method of electrical equipment grounding state provided by the present invention, monitoring
Device is built in monitored electrical equipment, and be installed on the power switch of monitored electrical equipment and monitored electrical equipment it
Between, when the ground wire broken string of monitored electrical equipment, poor contact or non-wiring, grounding monitor output end feeds back a height
Level signal gives microcontroller monitoring unit, and sends out sound-light alarm, so that testing crew finds problem with grounding in time, locates early
Reason, avoids the damage of monitored electrical equipment and causes Personal Risk to testing crew；Moreover, the monitoring device also has
It autotomys Electricity Functional, while microcontroller monitoring unit control acousto-optic warning unit sends out sound-light alarm, microcontroller monitoring unit
Make the control actuating of relay, to which cut-out is monitored the current supply circuit of electrical equipment, to monitoring device and monitored electrical equipment
It plays a protective role, also avoids causing Personal Risk to testing crew；
The real-time inspection and control method of the electrical equipment grounding state of the present invention can realize the ground connection to being monitored electrical equipment
The real-time continuous monitoring of state and Self-disconnecting defencive function；The present invention monitoring device have it is simple in structure, reliable, safe to use with
And in real time monitoring, immediately power-off etc. advantages.
Description of the drawings
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical scheme of the present invention
It is briefly described, it should be apparent that, the accompanying drawings in the following description is only one embodiment of the present of invention, general for this field
For logical technical staff, without creative efforts, other drawings may also be obtained based on these drawings.
Fig. 1 is the connection figure of electrical equipment grounding state monitoring apparatus and monitored electrical equipment of the present invention；
Fig. 2 is the structural schematic diagram of electrical equipment grounding state monitoring apparatus of the present invention；
Fig. 3 is the electrical schematic diagram of present invention control relay wiring；
Wherein：1- grounding monitor output ends, 2- are monitored the ground terminal of electrical equipment.
Specific implementation mode
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the present invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work,
It shall fall within the protection scope of the present invention.
A kind of real-time inspection and control method of electrical equipment grounding state provided by the present invention, including following step
Suddenly：
Step（1）Preoperation inspection：Monitored electrical equipment is electrically connected with 220V exchanges, is pressed on monitored electrical equipment
Self-test button CS checks whether acousto-optic warning unit is normal, unclamps " self-test " button CS after normal；
Step（2）Use operation：The ground terminal 2 of monitored electrical equipment is connect with ground wire（As shown in Figure 1）, open monitored
The power switch SS of electrical equipment is monitored electrical equipment and is in monitored state；
Step（3）Status monitoring：When the ground wire broken string of monitored electrical equipment, poor contact or non-wiring, ground connection prison
Survey output end 1 is high level, and the high level signal is fed back to microcontroller monitoring unit, and control acousto-optic warning unit sends out sound
Light is alarmed, so that testing crew finds problem with grounding in time, is handled early, avoids the damage of monitored electrical equipment and to examination
The personnel of testing cause Personal Risk；Meanwhile making the control actuating of relay, the current supply circuit for being monitored electrical equipment is disconnected, is monitored
Electrical equipment loses power supply, achievees the purpose that automatically power off；
Step（4）As a result it verifies：Testing crew is monitored the ground wire situation of electrical equipment according to sound-light alarm inspection, to ground connection
Line problem is repaired；After the problem of ground wire is repaired, acousto-optic warning unit automatically resets, and subsequent testing crew disconnects monitored
The power supply of electrical equipment is again switched on the power supply of monitored electrical equipment, and it is in running order to be monitored electrical equipment.It is monitored
The power switch of electrical equipment need to be manually opened, to ensure the safety of testing crew.
Electrical equipment grounding state monitoring apparatus is built in monitored electrical equipment, and is accessed and be monitored electrical equipment
In current supply circuit；Electrical equipment grounding state monitoring apparatus is arranged in the power switch for being monitored electrical equipment and is monitored electrical
Between the ground terminal of equipment, when the power supply of electrical equipment grounding state monitoring apparatus disconnects, it is monitored the power supply of electrical equipment
Circuit is also turned off, and is played a protective role simultaneously to monitored electrical equipment and monitoring device.
As shown in Fig. 2, electrical equipment grounding state monitoring apparatus includes self-test button CS, AC/DC converter, control relay
Device, pressure unit, acousto-optic warning unit, microcontroller monitoring unit, sampling unit and photoelectric coupling circuit unit；
Self-test button CS is in parallel with the power switch SS of monitored electrical equipment, and one end after parallel connection is electrically connected with 220V exchanges,
The other end is connect with the input terminal of AC/DC converters；The output end of AC/DC converters respectively with control relay, pressure unit
Input terminal connection；The output end of pressure unit is connect with the power end of microcontroller monitoring unit；Control relay also with sampling
One end of unit connects, and the other end of sampling unit is as grounding monitor output end；The both ends of sampling unit and photoelectric coupling electricity
The input terminal of road unit connects；The output end of photoelectric coupling circuit unit is connect with microcontroller monitoring unit；Microcontroller monitoring is single
Member is also connect with control relay, acousto-optic warning unit respectively.
As shown in figure 3, control relay includes intermediate relay and signal relay；Intermediate relay is normally opened with two pairs
Contact KA-1, KA-2 and coil KA, signal relay have a pair of normally-closed contact KS and coil KS；
The normally opened contact KA-1 of intermediate relay is arranged in self-test button CS and power switch SS in parallel and AC/DC converters
Between input terminal, one end of the normally opened contact KA-2 of intermediate relay and the normally-closed contact KS of signal relay respectively with AC/DC
The output end of converter connects, and the other end is connect with the coil KA of the coil KS of signal relay and signal relay respectively.
Sampling unit is sample resistance, and the resistance value of sample resistance is 40 ohm.One end of sample resistance passes through photoelectric coupling
Device circuit unit is connect with the P0.1 of microcontroller STM32L151 mouths, the other end（Grounding monitor output end 1）Pass through photoelectrical coupler
Circuit unit is connect with the P0.2 of microcontroller STM32L151 mouths, and double logical groups are carried out to P0.1 mouthfuls and P0.2 mouthfuls of input signals
It closes and judges, to judge whether the ground state for being monitored electrical equipment is normal；When ground state exception, microcontroller monitoring unit
Signal is sent out to control relay, signal relay coil KS is attracted under electromagnetic force, so that its normally-closed contact KS is disconnected, is led
Intermediate relay coil KA is caused to lose electromagnetic force tripping, the normally opened contact KA-1 and normally opened contact KA-2 that intermediate relay has been closed
It disconnects, so that the current supply circuit of monitored electrical equipment is disconnected, achieve the purpose that automatically power off；It is intermediate when power switch SS closures
Relay coil KA is attracted under electromagnetic force, and the normally opened contact KA-1 of intermediate relay and normally opened contact KA-2 is made to be closed,
Power supply connects to control relay, microcontroller monitoring unit, acousto-optic warning unit power supply, the current supply circuit of monitored electrical equipment
It is logical.
Self-test button CS is button switch of the i.e. disconnected formula without self-locking；Self-test button CS, for detecting connecing for monitoring device
Whether ground status monitoring function and sound and light of alarm are normal；Self-test button CS is connected in parallel with power switch SS, and the two can not
It is closed at.
Acousto-optic warning unit includes buzzer and indicator light.
Above disclosed is only the specific implementation mode of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation or modification,
It is covered by the protection scope of the present invention.
Claims (9)
1. a kind of real-time inspection and control method of electrical equipment grounding state, which is characterized in that including following steps：
Step（1）Preoperation inspection：Monitored electrical equipment is electrically connected with 220V exchanges, is pressed on monitored electrical equipment
" self-test " button checks whether the acousto-optic warning unit of electrical equipment grounding state monitoring apparatus is normal, unclamped after normal " from
Inspection " button CS；
Step（2）Use operation：The ground terminal of monitored electrical equipment is connect with ground wire, opens the electricity for being monitored electrical equipment
Source switch SS is monitored electrical equipment and is in monitored state；
Step（3）Status monitoring：When the ground wire broken string of monitored electrical equipment, poor contact or non-wiring, electrically set
The grounding monitor output end of standby earthing condition monitor is high level, and the high level signal is fed back to microcontroller monitoring list
Member, control acousto-optic warning unit send out sound-light alarm；Meanwhile making the control actuating of relay, disconnect the confession for being monitored electrical equipment
Electrical circuit, monitored electrical equipment lose power supply；
Step（4）As a result it verifies：Testing crew is monitored the ground wire situation of electrical equipment according to sound-light alarm inspection, to ground connection
Line problem is repaired；After the problem of ground wire is repaired, acousto-optic warning unit automatically resets, and subsequent testing crew disconnects monitored
The power supply of electrical equipment is again switched on the power supply of monitored electrical equipment, and it is in running order to be monitored electrical equipment.
2. the real-time inspection and control method of electrical equipment grounding state as described in claim 1, which is characterized in that described electrical
Equipment ground state monitoring apparatus is built in monitored electrical equipment, and is accessed in the current supply circuit for being monitored electrical equipment,
The self-test button of electrical equipment grounding state monitoring apparatus is arranged on the operation panel of monitored electrical equipment.
3. the real-time inspection and control method of electrical equipment grounding state as described in claim 1, which is characterized in that the step
（4）In, the power switch for being monitored electrical equipment need to be manually opened.
4. the real-time inspection and control method of electrical equipment grounding state as claimed in claim 1 or 2, which is characterized in that described
Electrical equipment grounding state monitoring apparatus includes self-test button CS, AC/DC converter, control relay, pressure unit, acousto-optic report
Alert unit, microcontroller monitoring unit, sampling unit and photoelectric coupling circuit unit；
The self-test button CS is in parallel with the power switch SS of monitored electrical equipment, and one end after parallel connection is exchanged with 220V to be electrically connected
It connects, the other end is connect with the input terminal of AC/DC converters；The output end of the AC/DC converters respectively with control relay, drop
Press the input terminal connection of unit；The output end of the pressure unit is connect with the power end of microcontroller monitoring unit；The control
Relay is also connect with one end of sampling unit, and the other end of sampling unit is as grounding monitor output end；The two of sampling unit
End is connect with the input terminal of the photoelectric coupling circuit unit；The output end of photoelectric coupling circuit unit is monitored with the microcontroller
Unit connects；The microcontroller monitoring unit is also connect with control relay, acousto-optic warning unit respectively.
5. the real-time inspection and control method of electrical equipment grounding state as claimed in claim 4, which is characterized in that the control
Relay includes intermediate relay and signal relay；Intermediate relay has two couples of normally opened contacts KA-1, KA-2 and coil KA,
Signal relay has a pair of normally-closed contact KS and coil KS；
The normally opened contact KA-1 of intermediate relay is arranged in self-test button CS and power switch SS in parallel and AC/DC converters
Between input terminal, one end of the normally opened contact KA-2 of intermediate relay and the normally-closed contact KS of signal relay respectively with AC/DC
The output end of converter connects, and the other end is connect with the coil KA of the coil KS of signal relay and signal relay respectively.
6. the real-time inspection and control method of electrical equipment grounding state as claimed in claim 4, which is characterized in that the sampling
Unit is sample resistance, and the resistance value of the sample resistance is 40 ohm.
7. the real-time inspection and control method of electrical equipment grounding state as claimed in claim 4, which is characterized in that the self-test
Button CS is button switch of the i.e. disconnected formula without self-locking.
8. the real-time inspection and control method of electrical equipment grounding state as claimed in claim 4, which is characterized in that the acousto-optic
Alarm unit includes buzzer and indicator light.
9. the real-time inspection and control method of electrical equipment grounding state as claimed in claim 4, which is characterized in that the monolithic
Machine monitoring unit uses the singlechip chip of model STM32L151.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810532393.9A CN108663595A (en) | 2018-05-29 | 2018-05-29 | A kind of real-time inspection and control method of electrical equipment grounding state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810532393.9A CN108663595A (en) | 2018-05-29 | 2018-05-29 | A kind of real-time inspection and control method of electrical equipment grounding state |
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| CN108663595A true CN108663595A (en) | 2018-10-16 |
Family
ID=63774143
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810532393.9A Pending CN108663595A (en) | 2018-05-29 | 2018-05-29 | A kind of real-time inspection and control method of electrical equipment grounding state |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270356A (en) * | 2018-11-22 | 2019-01-25 | 国网宁夏电力有限公司宁东供电公司 | Substation grounding point impedance ground intelligent monitoring and controlling device and instrument controlling method |
| CN109459793A (en) * | 2018-11-28 | 2019-03-12 | 国网辽宁省电力有限公司丹东供电公司 | Power distribution network laser prevents line combined floodgate detection device and application method with ground |
| CN110146769A (en) * | 2019-05-10 | 2019-08-20 | 深圳微步信息股份有限公司 | A kind of grounding wire monitoring device, EOS monitor system and method |
| CN113253038A (en) * | 2021-06-28 | 2021-08-13 | 广东电网有限责任公司中山供电局 | Online monitoring device and method for comprehensive alarm unit of GIS equipment of transformer substation |
| CN113567726A (en) * | 2021-07-21 | 2021-10-29 | 广东电网有限责任公司 | Ground wire installation safety monitoring device and ground wire |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109459793A (en) * | 2018-11-28 | 2019-03-12 | 国网辽宁省电力有限公司丹东供电公司 | Power distribution network laser prevents line combined floodgate detection device and application method with ground |
| CN109459793B (en) * | 2018-11-28 | 2024-02-02 | 国网辽宁省电力有限公司丹东供电公司 | Power distribution network laser closing detection device with grounding wire and use method |
| CN110146769A (en) * | 2019-05-10 | 2019-08-20 | 深圳微步信息股份有限公司 | A kind of grounding wire monitoring device, EOS monitor system and method |
| CN113253038A (en) * | 2021-06-28 | 2021-08-13 | 广东电网有限责任公司中山供电局 | Online monitoring device and method for comprehensive alarm unit of GIS equipment of transformer substation |
| CN113253038B (en) * | 2021-06-28 | 2021-09-10 | 广东电网有限责任公司中山供电局 | Online monitoring device and method for comprehensive alarm unit of GIS equipment of transformer substation |
| CN113567726A (en) * | 2021-07-21 | 2021-10-29 | 广东电网有限责任公司 | Ground wire installation safety monitoring device and ground wire |
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Application publication date: 20181016 |
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