CN107728051A - Method of testing, test device and the switch cabinet system of secondary control device - Google Patents
Method of testing, test device and the switch cabinet system of secondary control device Download PDFInfo
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- CN107728051A CN107728051A CN201710931147.6A CN201710931147A CN107728051A CN 107728051 A CN107728051 A CN 107728051A CN 201710931147 A CN201710931147 A CN 201710931147A CN 107728051 A CN107728051 A CN 107728051A
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- feedback signal
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention provides a kind of method of testing of secondary control device, test device and switch cabinet system.Using the rational logic step of this case and based on the detection under different conditions, and simulate the various failures combination for drawing appearance, use state, utilize rational failture evacuation method, so that location of fault can be easily known when a failure occurs, it can at once be overhauled, improve the efficiency of detection.
Description
Technical field
The present invention relates to high voltage electric equipment field, more particularly to a kind of method of testing of secondary control device, two tests
Device, computer-readable recording medium and switch cabinet system.
Background technology
High voltage power distributing cabinet refers to be used for play break-make, control in power system generating, transmission of electricity, distribution, electric energy conversion and consumption
Or protection etc. effect, voltage class 3.6kV ~ 550kV electric equipment products, mainly including primary cut-out, high voltage isolator
With earthed switch, high voltage load switch, high pressure automatic reclosing and sectionaliser, high-voltage actuating mechanism, high voltage explosion-proof power distribution device and
Several major classes such as high-tension switch cabinet.High voltage switch manufacturing industry is the manufacturing important component of power transmission and transforming equipment, in whole electric power
Occupy very important status in industry.
And ring main unit or switch cabinet system are then a rings important in high voltage electric equipment, it is mounted in metal or nonmetallic exhausted
Edge cabinet is interior or makes the electrical equipment of assembled compartment ring network power supplying units, and its core uses on-load switch and fusing
Device, have the advantages that simple in construction, small volume, price are low, can improve power supply parameter and performance and power supply safety.It is extensive
It is used in the power distribution station of the load centers such as Urban Residential District, skyscraper, large public building, factory and enterprise and box change
In power station.
When switch cubicle or ring main unit dispatch from the factory, it is necessary to be tested it comprehensively, prior art is good using practical set
Switch element coordinate test, the switch closing and switch opening yet with switch element is to have shorter service life, if waste
Substantial amounts of on-off times are used to test, then can greatly shorten service life on the client, and actual machine test cost is high.
The content of the invention
The first object of the present invention is to provide a kind of method of testing for realizing simulation test secondary control device.
The second object of the present invention is to provide a kind of simulating test device for realizing simulation test secondary control device.
The third object of the present invention is to provide a kind of computer-readable storage medium for realizing simulation test secondary control device
Matter.
The fourth object of the present invention is to provide a kind of switch cabinet system for realizing simulation test secondary control device.
In order to realize the first object of the present invention, the present invention provides a kind of method of testing of secondary control device, its feature
It is,
Simulating test device performs method of testing and sends trial signal to secondary control device successively, and method of testing includes:
Export initializing signal;
Output meter test signal;
Judge whether to receive divide-shut brake feedback signal;
Divide-shut brake feedback signal is not such as received, then output stage splice grafting earthing knife-switch status signal;
Judge whether to receive divide-shut brake feedback signal;
As do not received divide-shut brake feedback signal, then output stage closes Xiamen board status signal;
Judge whether to receive divide-shut brake feedback signal;
As do not received divide-shut brake feedback signal, then output stage taps earthing knife-switch status signal;
Judge whether to receive divide-shut brake feedback signal;
As do not received divide-shut brake feedback signal, then output stage closes isolation knife status signal;
Judge whether to receive divide-shut brake feedback signal;
As do not received divide-shut brake feedback signal, then export secondary control device and close energy storage switch state signal;
Judge whether to finish receiving simulation energy storage feedback signal;
Completion simulation energy storage feedback signal is such as received, then judges whether to receive energy storage indicator lamp feedback signal;
Energy storage indicator lamp feedback signal is such as received, then exports "on" position signal, then judges whether to receive combined floodgate feedback
Signal;
Combined floodgate feedback signal is such as received, then judges whether to receive combined floodgate indicator lamp feedback signal;
Combined floodgate indicator lamp feedback signal is such as received, then exports gate-dividing state signal, then judges whether to receive separating brake feedback
Signal;
Separating brake feedback signal is such as received, then judges whether to receive separating brake indicator lamp feedback signal;18
Separating brake indicator lamp feedback signal is such as received, then judges whether to receive non-energy storage indicator lamp feedback signal;
Non- energy storage indicator lamp feedback signal is such as received, then output stage simulation energy storage state signal, judges whether to have received
Into simulation energy storage feedback signal;
Completion simulation energy storage feedback signal is such as received, then judges whether to receive energy storage indicator lamp feedback signal;
Energy storage indicator lamp feedback signal is such as received, then exports test signal to relay protector, and judges that relay protector returns
Whether road passes through test;
Such as disconnected relay protector loop then exports secondary control device detection qualifying signal by test.
Further scheme is that method of testing also includes:
When judging whether to receive divide-shut brake feedback signal, combined floodgate feedback signal is such as received, then exports Closing fault signal.
Further scheme is that method of testing also includes:
When judging whether to receive divide-shut brake feedback signal, separating brake feedback signal is such as received, then exports separating brake fault-signal.
Further scheme is, output "on" position signal then judge whether to receive combined floodgate feedback signal it
Afterwards, method of testing also includes:
Feedback signal of not closing a floodgate is such as received, then exports Closing fault signal;
Further scheme is after output gate-dividing state signal then judges whether to receive separating brake feedback signal, to survey
Method for testing also includes:
Combined floodgate feedback signal is such as received, then exports Closing fault signal;
Non- separating brake feedback signal is such as received, then exports separating brake fault-signal.
In order to realize the second object of the present invention, the present invention provides a kind of simulating test device, it is characterised in that simulation is surveyed
Trial assembly is put including processor, and processor is realized when being used to perform the computer program stored in memory as any in above-mentioned scheme
The step of one method of testing.
In order to realize the third object of the present invention, the present invention provides a kind of computer-readable recording medium, is stored thereon with
Computer program, it is characterised in that:Realized when computer program is executed by processor such as any one test side in above-mentioned scheme
The step of method.
In order to realize the fourth object of the present invention, the present invention provides a kind of switch cabinet system, including switch element and secondary
Control device, secondary control device are monitored to switch element, it is characterised in that:Switch cabinet system also includes simulation test and filled
Put, simulating test device includes processor, and processor is realized as described above when being used to perform the computer program stored in memory
In scheme the step of any one method of testing.
Therefore using its rational logic step and based on the detection under different conditions, and simulate and draw out
Existing various failures combine, use state, utilize rational failture evacuation method so that can easily know when a failure occurs
It location of fault, can at once be overhauled, improve the efficiency of detection.
Brief description of the drawings
Fig. 1 is the flow chart of the Part I of method of testing embodiment of the present invention.
Fig. 2 is the flow chart of the Part II of method of testing embodiment of the present invention.
Fig. 3 is the flow chart of the Part III of method of testing embodiment of the present invention.
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
Referring to figs. 1 to Fig. 3, Fig. 2 be map interlinking 1 subsequent step, Fig. 3 is the subsequent step of map interlinking 2.Simulating test device
Perform method of testing and send trial signal to secondary control device successively, then realize the overall functionality inspection of secondary control device
Survey, specifically, the method for testing of secondary control device includes:
Step S1, initializing signal is exported, secondary control device is completely in original state, i.e., do not closed a floodgate, non-separating brake, do not store up
Can etc.;
Step S2, output meter test signal, judge secondary small chamber (i.e. secondary control device) instrument voltage and current whether
Normal display, if not, there is abnormal, detectable instrument circuit, it is such as normal to perform next step;
Whether step S3, judgement now receive divide-shut brake feedback signal, such as receive combined floodgate feedback signal, then the event of output combined floodgate
Barrier signal is simultaneously alarmed, and is shown short trouble occur, can be overhauled loop fault, such as receives separating brake feedback signal, then export separating brake
Fault-signal is simultaneously alarmed, and can overhaul loop fault;
Step S4, divide-shut brake feedback signal is not such as received, i.e., does not receive separating brake feedback signal and combined floodgate feedback signal, then exports
Platform splice grafting earthing knife-switch status signal, analog switch platform splice grafting earthing knife-switch;
Step S5, in the state of analog switch platform splice grafting earthing knife-switch, judge whether to receive divide-shut brake feedback signal, such as
Combined floodgate feedback signal is received, then exports Closing fault signal and alarms, loop fault can be overhauled, such as receive separating brake feedback letter
Number, then export separating brake fault-signal and alarm, loop fault can be overhauled;
Step S6, divide-shut brake feedback signal is not such as received, then output stage closes Xiamen board status signal, and analog switch platform is
Through closing lower door-plate;
Step S7, in the state of door-plate under analog switch platform has closed, judge whether to receive divide-shut brake feedback signal, such as
Combined floodgate feedback signal is received, then exports Closing fault signal and alarms, loop fault can be overhauled, such as receive separating brake feedback letter
Number, then export separating brake fault-signal and alarm, loop fault can be overhauled;
Step S8, divide-shut brake feedback signal is not such as received, then output stage tap earthing knife-switch status signal, analog switch platform is
Through tapping earthing knife-switch;
Step S9, in the state of analog switch platform has tapped earthing knife-switch, judge whether to receive divide-shut brake feedback signal, such as
Combined floodgate feedback signal is received, then exports Closing fault signal and alarms, loop fault can be overhauled, such as receive separating brake feedback letter
Number, then export separating brake fault-signal and alarm, loop fault can be overhauled;
Step S10, divide-shut brake feedback signal is not such as received, then output stage closes isolation knife status signal, analog switch platform
ECDC isolation knife;
Step S11, in the state of analog switch platform ECDC isolation knife, judge whether to receive divide-shut brake feedback signal,
Combined floodgate feedback signal is such as received, then exports Closing fault signal and alarms, loop fault can be overhauled, such as receives separating brake feedback
Signal, then export separating brake fault-signal and alarm, loop fault can be overhauled;
The step of by above-mentioned S2 to S11, using its rational logic step and based on the detection under different conditions so that
Location of fault can be easily known when a failure occurs, can be overhauled at once, improve the efficiency of detection.
Step S12, divide-shut brake feedback signal is not such as received, then export secondary control device and close energy storage on off state letter
Number, the energy storage of analog switch platform finishes and is in energy storage state;
Step S13, judge whether to finish receiving simulation energy storage feedback signal, such as receive unfinished energy storage signal, then export energy storage
Fault-signal is simultaneously alarmed, and can overhaul loop fault;
Step S14, completion simulation energy storage feedback signal is such as received, then judges whether to receive energy storage indicator lamp feedback signal, i.e.,
Judge that whether energy storage indicator lamp normally shows, as energy storage indicator lamp is non-lit up, then exports energy storage fault-signal and alarm, that is, overhaul
Energy storage indicator lamp, loop fault can be overhauled;
Step S15, energy storage indicator lamp feedback signal is such as received, that is, is lighted, then export "on" position signal, analog switch platform
"on" position is in, then judges whether to receive combined floodgate feedback signal;If detecting separating brake feedback signal before closing a floodgate,
Then export separating brake fault-signal and alarm, loop fault can be overhauled;
Step S16, combined floodgate feedback signal is such as received, then carry out judging closing operation situation, such as receive feedback letter of not closing a floodgate
Number, then export Closing fault signal and alarm, loop fault can be overhauled, such as receive separating brake feedback signal, then export separating brake event
Barrier signal is simultaneously alarmed, and can overhaul loop fault;
Step S17, the control of secondary small chamber are changed to "on" position, then judge whether to receive combined floodgate indicator lamp feedback signal, such as
Combined floodgate indicator lamp is non-lit up, then output instruction of closing a floodgate and is alarmed at failure, can overhaul loop fault, as separating brake indicator lamp is lighted, then
Output separating brake instruction failure is simultaneously alarmed, and can overhaul loop fault;
Step S18, combined floodgate indicator lamp feedback signal is such as received, i.e., when normal, then judge whether sub-switching operation is normal, such as detected
To switching signal, then export Closing fault signal and alarm, such as detect non-sub-gate signal, then export separating brake fault-signal and report
Alert, then analog switch platform is in gate-dividing state, then exports gate-dividing state signal, then judge whether to receive separating brake
Feedback signal;
Step S19, such as receives separating brake feedback signal, then judges whether to receive separating brake indicator lamp feedback signal, such as receive conjunction
Lock indicator lamp lights feedback signal, then output, which is closed a floodgate, indicates failure and alarm, and such as receives the non-lit up feedback letter of separating brake indicator lamp
Number, then export separating brake instruction fault-signal and alarm;
Step S20, separating brake indicator lamp feedback signal is such as received, i.e. indicator lamp is normal, then judges whether to receive non-energy storage instruction
Lamp feedback signal, such as receive energy storage lamp and do not extinguish feedback signal, then export energy storage fault-signal and alarm, indicator lamp can be returned
Detected on road;
Step S21, non-energy storage indicator lamp feedback signal is such as received, then output stage simulation energy storage state signal, analog switch
Platform has completed energy storage and has been in energy storage state, judges whether to receive completion simulation energy storage feedback signal, such as receives not
Energy storage signal is completed, then exports energy storage fault-signal and alarms;
Step S22, completion simulation energy storage feedback signal is such as received, then judges whether to receive energy storage indicator lamp feedback signal,
The non-lit up feedback signal of energy storage indicator lamp is such as received, then exports energy storage fault-signal;
Step S23, energy storage indicator lamp feedback signal is such as received, i.e. energy storage indicator lamp is normal, then exports and survey to relay protector
Trial signal, and judge whether relay protector loop is then exported secondary by test, such as disconnected relay protector loop by test
Control device detects qualifying signal, and fault-signal is exported if abnormal and is alarmed, then relay protector can be examined
Repair.
Simulating test device embodiment:
Simulating test device includes substrate, and processor and memory are provided with substrate, and simulating test device is connect by data
Mouth and data wire are connected with secondary control device, and processor is realized as above when being used to perform the computer program stored in memory
The step of stating method of testing.
Computer-readable recording medium embodiment:
Computer program is stored with computer-readable recording medium, realizes when computer program is executed by processor and surveys as described above
The step of method for testing.
Switch cabinet system embodiment:
Switch cabinet system includes switch element and secondary control device, and secondary control device is monitored to switch element, switch
Cabinet system also includes simulating test device, and simulating test device includes processor, and processor is used to perform what is stored in memory
The step of above-mentioned method of testing is realized during computer program.
Therefore using its rational logic step and based on the detection under different conditions, and simulate and draw out
Existing various failures combine, use state, utilize rational failture evacuation method so that can easily know when a failure occurs
It location of fault, can at once be overhauled, improve the efficiency of detection.
Claims (8)
1. the method for testing of secondary control device, it is characterised in that
Simulating test device performs method of testing and sends trial signal, the method for testing bag to the secondary control device successively
Include:
Export initializing signal;
Output meter test signal;
Judge whether to receive divide-shut brake feedback signal;
Divide-shut brake feedback signal is not such as received, then output stage splice grafting earthing knife-switch status signal;
Judge whether to receive divide-shut brake feedback signal;
As do not received divide-shut brake feedback signal, then output stage closes Xiamen board status signal;
Judge whether to receive divide-shut brake feedback signal;
As do not received divide-shut brake feedback signal, then output stage taps earthing knife-switch status signal;
Judge whether to receive divide-shut brake feedback signal;
As do not received divide-shut brake feedback signal, then output stage closes isolation knife status signal;
Judge whether to receive divide-shut brake feedback signal;
As do not received divide-shut brake feedback signal, then export secondary control device and close energy storage switch state signal;
Judge whether to finish receiving simulation energy storage feedback signal;
Completion simulation energy storage feedback signal is such as received, then judges whether to receive energy storage indicator lamp feedback signal;
Energy storage indicator lamp feedback signal is such as received, then exports "on" position signal, then judges whether to receive combined floodgate feedback
Signal;
Combined floodgate feedback signal is such as received, then judges whether to receive combined floodgate indicator lamp feedback signal;
Combined floodgate indicator lamp feedback signal is such as received, then exports gate-dividing state signal, then judges whether to receive separating brake feedback
Signal;
Separating brake feedback signal is such as received, then judges whether to receive separating brake indicator lamp feedback signal;
Separating brake indicator lamp feedback signal is such as received, then judges whether to receive non-energy storage indicator lamp feedback signal;
Non- energy storage indicator lamp feedback signal is such as received, then output stage simulation energy storage state signal, judges whether to have received
Into simulation energy storage feedback signal;
Completion simulation energy storage feedback signal is such as received, then judges whether to receive energy storage indicator lamp feedback signal;
Energy storage indicator lamp feedback signal is such as received, then exports test signal to relay protector, and judges that relay protector returns
Whether road passes through test;
Such as disconnected relay protector loop then exports secondary control device detection qualifying signal by test.
2. method of testing according to claim 1, it is characterised in that:
The method of testing also includes:
When judging whether to receive divide-shut brake feedback signal, combined floodgate feedback signal is such as received, then exports Closing fault signal.
3. method of testing according to claim 1, it is characterised in that:
The method of testing also includes:
When judging whether to receive divide-shut brake feedback signal, separating brake feedback signal is such as received, then exports separating brake fault-signal.
4. according to the method for testing described in any one of claims 1 to 3, it is characterised in that:
After output "on" position signal then judges whether to receive combined floodgate feedback signal, the method for testing also includes:
Feedback signal of not closing a floodgate is such as received, then exports Closing fault signal;
Separating brake feedback signal is such as received, then exports divide-shut brake loop short circuit fault signal.
5. according to the method for testing described in any one of claims 1 to 3, it is characterised in that:
After output gate-dividing state signal then judges whether to receive separating brake feedback signal, the method for testing also includes:
Combined floodgate feedback signal is such as received, then exports Closing fault signal;
Non- separating brake feedback signal is such as received, then exports separating brake fault-signal.
6. simulating test device, it is characterised in that the simulating test device includes processor, and the processor is deposited for execution
Realized during the computer program stored in reservoir as described in any one in claim 1-5 the step of method of testing.
7. computer-readable recording medium, it is stored thereon with computer program, it is characterised in that:The computer program is processed
Realized when device performs as described in any one in claim 1-5 the step of method of testing.
8. switch cabinet system, including switch element and secondary control device, the secondary control device are supervised to switch element
Control, it is characterised in that:
The switch cabinet system also includes simulating test device, and the simulating test device includes processor, and the processor is used
The step of the method for testing as described in any one in claim 1-5 is realized when the computer program stored in memory is performed
Suddenly.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201141885Y (en) * | 2007-12-26 | 2008-10-29 | 上海市电力公司超高压输变电公司 | Ripple voltage and bus-bar voltage monitoring relay of transforming station DC system |
CN103487713A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit |
CN106300046A (en) * | 2016-08-29 | 2017-01-04 | 江苏银佳企业集团有限公司 | A kind of high-voltage central-positioned switch cubicle |
CN106372816A (en) * | 2016-10-09 | 2017-02-01 | 南京国电南自电网自动化有限公司 | Bayesian reasoning-based substation secondary system fault evaluation method |
CN113328524A (en) * | 2021-06-02 | 2021-08-31 | 合占电力有限公司 | Intelligent transformation of column switch based on FA |
-
2017
- 2017-10-09 CN CN201710931147.6A patent/CN107728051B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201141885Y (en) * | 2007-12-26 | 2008-10-29 | 上海市电力公司超高压输变电公司 | Ripple voltage and bus-bar voltage monitoring relay of transforming station DC system |
CN103487713A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit |
CN106300046A (en) * | 2016-08-29 | 2017-01-04 | 江苏银佳企业集团有限公司 | A kind of high-voltage central-positioned switch cubicle |
CN106372816A (en) * | 2016-10-09 | 2017-02-01 | 南京国电南自电网自动化有限公司 | Bayesian reasoning-based substation secondary system fault evaluation method |
CN113328524A (en) * | 2021-06-02 | 2021-08-31 | 合占电力有限公司 | Intelligent transformation of column switch based on FA |
Non-Patent Citations (1)
Title |
---|
余小宇: "电力自动化现状及故障分析方法研究" * |
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