CN105044542B - A kind of temporary ground wire state self checking method of power equipment - Google Patents
A kind of temporary ground wire state self checking method of power equipment Download PDFInfo
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- CN105044542B CN105044542B CN201510471234.9A CN201510471234A CN105044542B CN 105044542 B CN105044542 B CN 105044542B CN 201510471234 A CN201510471234 A CN 201510471234A CN 105044542 B CN105044542 B CN 105044542B
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Abstract
The present invention relates to a kind of temporary ground wire state self checking method of power equipment; described temporary ground wire state self checking method uses multi-agent technology; there are maintainer agency and operations staff agency to send ground wire self-inspection order to act on behalf of to ground wire; the ground state of automatic detection temporary ground wire is acted on behalf of by ground wire; and be sent to maintainer agency, operations staff agency, five anti-machines agencies and automation background proxy in real time and shown; temporary ground wire state is monitored, it is to avoid temporary ground wire fails and loses protection during work；Five described anti-machines act on behalf of for the five of power equipment it is anti-examine, the real-time remote monitoring of described automation background proxy for state of connecting wires.The requirement of crew's covering, real-time self-inspection and multi-platform displaying and the check to temporary ground wire state aware is realized, the operational management work of temporary ground wire is effectively raised.
Description
Technical field
The present invention relates to power equipment, particularly electric power apparatus examination technical field of operation, specifically a kind of power equipment
Temporary ground wire state self checking method.
Background technology
Temporary ground wire is that a kind of safety to be mounted is short before power industry is overhauled after equipment or circuit power-off
Road device, the safety protective tools for preventing to damage operating personnel or equipment for preventing to send a telegram here suddenly.Mainly have following
Several effects：
1., should be by the three-phase overhead line or bus of mains side to prevent unexpected power transmission when high-tension line or overhaul of the equipments
Use ground wire temporary grounding.
2. prevent adjacent high-tension line or equipment from producing induced voltage do harm to huamn body to dead line or equipment, or
Interruption maintenance equipment or circuit, should be by the relevant of interruption maintenance circuit or equipment there may be induced voltage do harm to huamn body
Position ground wire temporary grounding.
3. in the equipment after power failure during operation, application of grounding line puts the residual charge in equipment with temporary ground wire
Fall, that is, discharge.
It can be seen that, temporary ground wire is a kind of required security apparatus of electrical equipment interruption maintenance work, is protection O＆M people
Member and the lifeline of maintainer's personal safety.In real work, belonging to provisional, it is necessary to frequent the operation of ground wire more
Ground is hung, dismounting ground wire, is easily hung because the fault such as omission or carelessness causes to miss, tears open by mistake, leaks extension, is leaked and tear open so that should play protection
The temporary ground wire of effect is on the contrary into great maloperation hidden danger.In hanging earthing conductor and ground wire running, lack online
Whether whether virtual earth, wire clamp the abnormal conditions such as loosen to monitoring grounding point so that ground wire loses protective effect.
Mostly in terms of ground wire anti-misoperation at present is to rely on the anti-error and artificial judgement of system, or employs independent operating
Mode, system background without and five-preventing system be combined, be not carried out the cross-platform sharing of whole station information, it is impossible to meet entirely
Member, the safety requirements of real-time, multi-functional covering.
The content of the invention
It is an object of the invention to provide a kind of temporary ground wire state self checking method of power equipment, the present invention uses many generations
The distributed management scheme of Technology design temporary ground wire is managed, it is whether reliable by pressure sensor monitoring grounding wire clamp, lead to
The change of Current Voltage judges whether earth point is reliable when crossing hanging earthing conductor, by injecting low frequency signal and measuring loop electric current
Come judge ground wire operation during whether reliable ground；By technology of Internet of things and multi-agent technology, line and operation are grounded
Personnel, maintainer, five anti-machines, automation backstage realize information exchange, real-time monitoring grounding wire state, and participate in five anti-schools
Core, realizes the requirement of crew's covering, real-time self-inspection and multi-platform displaying and the check to temporary ground wire state aware, effectively
Improve temporary ground wire operational management work.To solve at present in terms of ground wire anti-misoperation due to being to rely on mostly
The anti-error and artificial judgement of system, easily produces erroneous judgement, the problem of bringing personal property damage.
To achieve the above object, the solution of the present invention is：A kind of temporary ground wire state self checking method of power equipment, institute
The temporary ground wire state self checking method stated is that, based on multi-agent technology, mainly have including 09 ground wire agency, maintainer
Agency and operations staff agency, whether described three-phase wire clamp and earthing clamp of the temporary ground wire state including temporary ground wire
Clip, and earth point whether reliable ground, specifically include following steps：
(1) when carrying out upkeep operation to power equipment, acted on behalf of from maintainer agency and operations staff to ground wire generation
Temporary ground wire self-inspection order is sent in haircut, and ground wire agency is received after self-inspection order, starts to carry out temporary ground wire state
Detection；
(2) method whether detection three-phase wire clamp and earthing clamp clip is：Temporary ground wire three-phase wire clamp and connect
Each pressure detecting point of ground clamp sets pressure sensor, and each pressure sensor detects three-phase wire clamp and earthing clamp in real time
Pressure signal, and ground wire agency is sent to, the pressure detecting that described ground wire agency sends according to each pressure sensor is believed
Number, judge whether each wire clamp is firm and fully contacts, and after three-phase wire clamp or earthing clamp loosening is detected, send alarm
Signal；
(3) whether the method for reliable ground is detection temporary ground wire earth point：Earth point is fixed in temporary ground wire
Afterwards, when by mutually three-phase wire clamp is hung, mutually there is electric current to flow through if ground wire agency detects correspondence, judge that ground wire can be abutted against
Ground, if the mutually no electric current of correspondence flows through, earth point does not have reliable ground, and ground wire agency sends alarm signal；
(4) artificial self-inspection or timer-controlled self-inspection ground wire whether reliable ground when, inject setting frequency one by one to three-phase wire clamp
The low-frequency ac signal of rate, if ground wire agency monitors to flow through the electric current of corresponding frequencies in loop, judges that ground wire is run
Period reliable ground, otherwise, ground wire agency send alarm signal.
It is described in described step (2) according to the temporary ground wire state self checking method of power equipment of the present invention
Pressure sensor be pressure switch, after the pressure of pressure detecting point reaches setup pressure value, pressure switch action, connect
The loop that logical pressure sensor is acted on behalf of with ground wire, ground wire acts on behalf of the pressure signal for detecting loop, then judges that the pressure is examined
Measuring point reliable grip；When in all pressure-measuring-points, the pressure switch for having more than 85% all starts, then differentiate that each wire clamp is abundant
Contact.
According to the temporary ground wire state self checking method of power equipment of the present invention, described ground wire agency will face
When state of earth wire be sent to automation background proxy in real time, pass through described automation background proxy real-time remote monitoring and be grounded
Wire state, and the abnormal alarm of state of earth wire is being monitored, remind maintainer and operations staff, it is to avoid interim during work
Ground wire fails and loses protection to maintainer and operations staff.
According to the temporary ground wire state self checking method of power equipment of the present invention, described temporary ground wire self-inspection
Method is provided with five anti-machine agencies, and five for power equipment are anti-to be examined.
According to the temporary ground wire state self checking method of power equipment of the present invention, each agency includes man-machine boundary
Face, is interacted for acting on behalf of with user；Communication module, for exchanging information with other agencies；Data Analysis Services module, is used for
The data message received is analyzed, state of earth wire is judged；Data storage, for storing, each agency is existing to be known
Knowledge, experience or data, the problem of these data are treated from the interaction acted on behalf of with other or in the past.
The beneficial effect that the present invention reaches：The present invention uses the distributed pipes of multi-agent technology Technology design temporary ground wire
Reason scheme, it is whether reliable by pressure sensor monitoring grounding wire clamp, sentenced by the change of Current Voltage during hanging earthing conductor
Whether disconnecting place reliable, by inject low frequency signal and measuring loop electric current come judge ground wire run during whether can be abutted against
Ground；By technology of Internet of things and multi-agent technology, line and operations staff, maintainer, five anti-machines, automation backstage are grounded
Information exchange, real-time monitoring grounding wire state are realized, and participates in five anti-checks, is realized to the complete of temporary ground wire state aware
The requirement of member's covering, real-time self-inspection and multi-platform displaying and check, effectively raises the operational management work of temporary ground wire.
Brief description of the drawings
Fig. 1 is the self checking structure schematic diagram of temporary ground wire of the present invention；
Fig. 2 is the wiring diagram whether present invention detection wire clamp clips；
Fig. 3 be the present invention detection earth point whether the wiring diagram of reliable ground；
Fig. 4 is ground wire self-inspection flow chart of the present invention.
Embodiment
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings.
The temporary ground wire self checking method that the present invention is designed be used to realizing to the crew of temporary ground wire state aware covering,
The requirement of real-time self-inspection and multi-platform displaying and check, effectively improves the operational management work of temporary ground wire.Need to have with
Lower function：
(1) whether the ground state (ground wire Agent) of automatic detection temporary ground wire, including three-phase wire clamp clip, and connect
Whether place loosens, and possesses timer-controlled self-inspection, go into operation license self-inspection isotype, and ground state is sent into maintainer in time
(maintainer Agent), operations staff (operations staff Agent), five anti-machines (five anti-machine Agent), (automation of automation backstage
Backstage Agent) etc. target.
(2) state of temporary ground wire is shown in corresponding equipment at five anti-screen or micro_computer five_proof interfaces.Five anti-machines enter
During row simulated operation, it need to judge that the interval whether there is temporary ground wire, and carry out five anti-checks, it is to avoid live ground wiring or band
The generation of the pernicious misoperation faults such as ground wire combined floodgate.
(3) service work director is by wearing intelligent terminal IED (maintainer Agent) come real-time monitoring grounding wire
State, prevents that temporary ground wire failure is so as to lose protection during work.
(4) temporary ground wire is quickly positioned by BEI-DOU position system, is easy to remove.
Temporary ground wire is that a kind of safety to be mounted is short before power industry is overhauled after equipment or circuit power-off
Road device, the safety protective tools for preventing to damage operating personnel or equipment for preventing to send a telegram here suddenly.Temporary ground wire
One end be grounded by earthing clamp, the other end set three-phase wire clamp, respectively connect power equipment triple line.As shown in figure 1,
The temporary ground wire self-checking system that the present invention is designed includes ground wire agency, maintainer agency, operations staff agency, five anti-machines
Agency and automation background proxy, described ground wire act on behalf of the ground state for automatic detection temporary ground wire, and in real time
Maintainer agency, operations staff agency, five anti-machine agencies and automation background proxy is sent to be shown；Described maintenance
Personnel act on behalf of and operations staff acts on behalf of and acted on behalf of for sending ground wire self-inspection order to ground wire, and monitoring grounding wire in real time
State, it is to avoid temporary ground wire fails and loses protection during work；Five described anti-machines are acted on behalf of for the five of power equipment anti-inspections
Test, described automation background proxy is used to connecting wires the real-time remote monitoring of state.
Each agency includes man-machine interface, is interacted for acting on behalf of with user；Communication module, for being exchanged with other agencies
Information；Data Analysis Services module, for analyzing the data message received, judges state of earth wire；Data storage
Device, for storing the existing knowledge of each agency, experience or data, these data from the interaction acted on behalf of with other or
In the past treated the problem of.
As shown in Fig. 2 each pressure detecting point of three-phase wire clamp and earthing clamp sets pressure sensor, each pressure sensor
Signal output part connection ground wire agency, pressure sensor detects the pressure signal of three-phase wire clamp and earthing clamp in real time, and
Ground wire agency is sent to, the pressure signal that described ground wire agency sends according to pressure sensor judges that each wire clamp is
No firm and fully contact, and after three-phase wire clamp or earthing clamp loosening is detected, send alarm signal.
Pressure sensor described in the present embodiment uses pressure switch, judges whether each wire clamp is firm and fully contacts,
Need to meet two conditions, i.e.,：
(1) after the pressure of pressure detecting point reaches setup pressure value, pressure switch action, cut-in pressure sensor with
The loop of ground wire agency, ground wire acts on behalf of the pressure signal for detecting loop, then judges the pressure detecting point reliable grip；
(2) when in all pressure-measuring-points, the pressure switch for having more than 85% all starts, then differentiate that each wire clamp fully connects
Touch.
As shown in figure 3, ground wire is fixed after earth point, when by mutually three-phase wire clamp is hung, if ground wire agency detects
Correspondence mutually has electric current to flow through, then judges ground wire reliable ground, if each mutually no electric current flows through, earth point is no to be abutted against
Ground, ground wire agency sends alarm signal.
In artificial self-inspection or timer-controlled self-inspection ground wire reliable ground, AC power, ground wire agency's connection exchange are set
One end of power supply, the other end of the AC power connects one end of three-phase wire clamp hanging wire, and the other end of the three-phase wire clamp connects
Ground wire agency is met, the low-frequency ac signal of setpoint frequency is injected one by one to three-phase wire clamp by AC power, if ground wire generation
Manage and monitor to flow through the electric current of corresponding frequencies in loop, then reliable ground during ground wire operation is judged, otherwise, it is determined that ground wire
During operation, without reliable ground, ground wire agency sends alarm signal, reminds staff to note.
The ground wire system of the present invention is additionally provided with BEI-DOU position system, is quickly positioned and connect temporarily by BEI-DOU position system
Ground wire, is easy to remove.
As shown in figure 4, the present invention is to the specific detection process of temporary ground wire state：
(1) when carrying out upkeep operation to power equipment, acted on behalf of from maintainer agency and operations staff to ground wire generation
Temporary ground wire self-inspection order is sent in haircut, and ground wire agency is received after self-inspection order, starts to carry out temporary ground wire state
Detection.
(2) method whether detection three-phase wire clamp and earthing clamp clip is：Temporary ground wire three-phase wire clamp and connect
Each pressure detecting point of ground clamp sets pressure sensor, and each pressure sensor detects three-phase wire clamp and earthing clamp in real time
Pressure signal, and ground wire agency is sent to, the pressure detecting that described ground wire agency sends according to each pressure sensor is believed
Number, judge whether each wire clamp is firm and fully contacts, and after three-phase wire clamp or earthing clamp loosening is detected, send alarm
Signal；
Judge whether each wire clamp is firm and fully contact is, it is necessary to meet two conditions, i.e.,：
A. after the pressure of pressure detecting point reaches setup pressure value, pressure switch action, cut-in pressure sensor with
The loop of ground wire agency, ground wire acts on behalf of the pressure signal for detecting loop, then judges the pressure detecting point reliable grip；b.
When in all pressure-measuring-points, the pressure switch for having more than 85% all starts, then differentiate that each wire clamp is fully contacted.
(3) whether the method for reliable ground is detection temporary ground wire earth point：Earth point is fixed in temporary ground wire
Afterwards, when by mutually three-phase wire clamp is hung, mutually there is electric current to flow through if ground wire agency detects correspondence, judge that ground wire can be abutted against
Ground, if the mutually no electric current of correspondence flows through, earth point does not have reliable ground, and ground wire agency sends alarm signal.
(4) artificial self-inspection or timer-controlled self-inspection ground wire whether reliable ground when, inject setting frequency one by one to three-phase wire clamp
The low-frequency ac signal of rate, if ground wire agency monitors to flow through the electric current of corresponding frequencies in loop, judges that ground wire is run
Period reliable ground, otherwise, ground wire do not have reliable ground during running, and ground wire agency sends alarm signal.
(5) temporary ground wire state is sent to automation background proxy by the ground wire agency described in real time, by described
Automation background proxy real-time remote monitoring state of earth wire, and monitoring the abnormal alarm of state of earth wire, reminding inspection
Repair personnel and operations staff, it is to avoid temporary ground wire fails and loses protection to maintainer and operations staff during work.
The present invention designs the distributed management scheme of temporary ground wire using multi-agent technology, is supervised by pressure sensor
Survey whether earthing clamp reliably and adequately contacts, judge that earth point whether may be used by the change of Current Voltage during hanging earthing conductor
Lean on, by injecting the low-frequency ac signal of setpoint frequency, and whether measuring loop electric current is come reliable during judging ground wire operation
Ground connection；By technology of Internet of things and multi-agent technology, it is grounded after line and operations staff, maintainer, five anti-machines, automation
Platform realizes information exchange, real-time monitoring grounding wire state, and participates in five anti-checks, realizes to temporary ground wire state aware
The requirement of crew's covering, real-time self-inspection and multi-platform displaying and check, effectively raises the operational management work of temporary ground wire
Make.
Claims (5)
1. a kind of temporary ground wire state self checking method of power equipment, it is characterised in that：Described temporary ground wire state is certainly
Detecting method is that, based on multi-agent technology, mainly have including ground wire agency, maintainer agency and operations staff agency, described
Temporary ground wire state including temporary ground wire three-phase wire clamp and earthing clamp whether clip, and whether earth point reliable
Ground connection, specifically includes following steps：
(1) when carrying out upkeep operation to power equipment, act on behalf of to act on behalf of to ground wire from maintainer agency and operations staff and send out
Temporary ground wire self-inspection order is sent, ground wire agency receives after self-inspection order, starts to detect temporary ground wire state；
(2) method whether detection three-phase wire clamp and earthing clamp clip is：In the three-phase wire clamp and ground wire of temporary ground wire
Each pressure detecting point of folder sets pressure sensor, and each pressure sensor detects the pressure of three-phase wire clamp and earthing clamp in real time
Signal, and ground wire agency is sent to, the pressure detecting signal that described ground wire agency sends according to each pressure sensor is sentenced
Whether each disconnected wire clamp is firm and fully contacts, and after three-phase wire clamp or earthing clamp loosening is detected, sends alarm signal；
(3) whether the method for reliable ground is detection temporary ground wire earth point：After temporary ground wire fixes earth point,
During by mutually hanging three-phase wire clamp, mutually there is electric current to flow through if ground wire agency detects correspondence, ground wire reliable ground being judged, if right
Should mutually no electric current flow through, then earth point does not have a reliable ground, and ground wire agency sends alarm signal；
(4) artificial self-inspection or timer-controlled self-inspection ground wire whether reliable ground when, inject setpoint frequency one by one to three-phase wire clamp
Low-frequency ac signal, if ground wire agency monitors to flow through the electric current of corresponding frequencies in loop, during judging ground wire operation
Reliable ground, otherwise, ground wire agency send alarm signal.
2. the temporary ground wire state self checking method of power equipment according to claim 1, it is characterised in that described step
Suddenly in (2), described pressure sensor is pressure switch, after the pressure of pressure detecting point reaches setup pressure value, pressure
The actuating of relay, the loop that cut-in pressure sensor is acted on behalf of with ground wire, ground wire acts on behalf of the pressure signal for detecting loop, then
Judge the pressure detecting point reliable grip；When in all pressure detecting points, the pressure switch for having more than 85% all starts, then
Differentiate that each wire clamp is fully contacted.
3. the temporary ground wire state self checking method of power equipment according to claim 1, it is characterised in that described connects
Temporary ground wire state is sent to automation background proxy by ground wire agency in real time, real-time by described automation background proxy
Remote monitoring state of earth wire, and the abnormal alarm of state of earth wire is being monitored, remind maintainer and operations staff, it is to avoid
Temporary ground wire fails and loses protection to maintainer and operations staff during work.
4. the temporary ground wire state self checking method of power equipment according to claim 1, it is characterised in that described faces
When ground wire self checking method be provided with five anti-machines agencies, five for power equipment are anti-to be examined.
5. the temporary ground wire state self checking method of power equipment according to claim 1, it is characterised in that each agency is equal
Including man-machine interface, interacted for acting on behalf of with user；Communication module, for exchanging information with other agencies；At data analysis
Module is managed, for analyzing the data message received, state of earth wire is judged；Data storage, for storing each generation
Existing knowledge, experience or data are managed, what these data were treated from the interaction acted on behalf of with other or in the past asks
Topic.
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| CN201510471234.9A CN105044542B (en) | 2015-08-04 | 2015-08-04 | A kind of temporary ground wire state self checking method of power equipment |
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| CN201510471234.9A CN105044542B (en) | 2015-08-04 | 2015-08-04 | A kind of temporary ground wire state self checking method of power equipment |
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| CN105044542B true CN105044542B (en) | 2017-10-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572517B (en) * | 2016-02-26 | 2019-02-19 | 贵州电网有限责任公司铜仁供电局 | A kind of arrester on-line monitoring Intelligent live access protective device and control method |
| CN108051615A (en) * | 2017-12-29 | 2018-05-18 | 国家电网公司 | A kind of detection type tester ground wire |
| CN112565313B (en) * | 2019-09-10 | 2022-05-06 | 中国移动通信有限公司研究院 | Triggering method of sensor of Internet of things equipment and Internet of things equipment |
| 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 |
| CN116577699A (en) * | 2023-07-13 | 2023-08-11 | 三峡集团浙江能源投资有限公司 | Loss-of-ground monitoring device for small-resistance grounding system of pumped storage power station |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064395A (en) * | 2009-11-17 | 2011-05-18 | 珠海优特电力科技股份有限公司 | Grounding device and working method thereof |
| JP2013217809A (en) * | 2012-04-10 | 2013-10-24 | Kaco Technos Co Ltd | Handy type wiring checker and method for checking wiring conduction |
| CN104318300A (en) * | 2014-10-27 | 2015-01-28 | 国网冀北电力有限公司张家口供电公司 | Three-card-in-one based transformer substation tool management system and method |
| CN104459445A (en) * | 2014-12-16 | 2015-03-25 | 国家电网公司 | Distributing line misoperation preventing detecting device and detecting method thereof |
-
2015
- 2015-08-04 CN CN201510471234.9A patent/CN105044542B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064395A (en) * | 2009-11-17 | 2011-05-18 | 珠海优特电力科技股份有限公司 | Grounding device and working method thereof |
| JP2013217809A (en) * | 2012-04-10 | 2013-10-24 | Kaco Technos Co Ltd | Handy type wiring checker and method for checking wiring conduction |
| CN104318300A (en) * | 2014-10-27 | 2015-01-28 | 国网冀北电力有限公司张家口供电公司 | Three-card-in-one based transformer substation tool management system and method |
| CN104459445A (en) * | 2014-12-16 | 2015-03-25 | 国家电网公司 | Distributing line misoperation preventing detecting device and detecting method thereof |
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