CN106841876B - A kind of monitoring method of relay protection outlet pressing plate - Google Patents
A kind of monitoring method of relay protection outlet pressing plate Download PDFInfo
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- CN106841876B CN106841876B CN201710187709.0A CN201710187709A CN106841876B CN 106841876 B CN106841876 B CN 106841876B CN 201710187709 A CN201710187709 A CN 201710187709A CN 106841876 B CN106841876 B CN 106841876B
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- investment
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- relay
- reclosing
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000005611 electricity Effects 0.000 claims abstract description 64
- 230000008878 coupling Effects 0.000 claims abstract description 40
- 238000010168 coupling process Methods 0.000 claims abstract description 40
- 238000005859 coupling reaction Methods 0.000 claims abstract description 40
- 238000013519 translation Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
Abstract
The present invention relates to a kind of monitoring methods of relay protection outlet pressing plate; obtain trip protection output clamping, reclosing output clamping lower end connecting column investment voltage signal; when putting into voltage signal reflection trip protection output clamping, reclosing output clamping to put into, output investment status information；When putting into voltage signal reflection trip protection output clamping, reclosing output clamping to leak investment or virtual connection, no output puts into voltage signal；The investment state of relay protection outlet pressing plate is monitored by investment status information.The combination that the present invention passes through cascade triode and light coupling relay; the same voltage translation circuit, which can be achieved at the same time, judges leakage investment, virtual connection; it can not only judge the investment situation of protective device tripping output clamping and reclosing output clamping; can also judge pressing plate whether virtual connection, and the judgment method for solving voltage difference cannot exclude the exception returned when the both ends of lock output clamping are both positive electricity.
Description
Technical field
The present invention relates to substation's relay protection technologies, more specifically to a kind of relay protection outlet pressing plate
Monitoring method.
Background technique
In recent years, with the development of the automation of transformation substations, the state of the function pressing plate of protective relaying device all can more than
It send to monitoring center, monitoring is lacked to the state of protection exit pressing plate only.And the state of protection exit pressing plate directly influences
When electric network fault, whether protective device can tripping circuit breaker and isolated fault.
Due to not monitoring to protection exit pressing plate, also occurred output clamping leakage during substation inspection
It throws, or the case where leakage investment, virtual connection due to pressing plate and the range that causes the accident expand.
The prior art mainly passes through two methods to the monitoring of pressing plate and realizes:
First is that being compared by being further added by an auxiliary node on the position when pressing plate is put into, or by shooting image
It is right, the monitoring of Lai Shixian pressing plate；
Second is that comparing realization monitoring by the current potential on Egress node both sides.
The above method there are the shortcomings that are as follows:
Method one cannot achieve judgement when pressing plate virtual connection；
Method two, if being overlapped Egress node both sides is all positive electricity, can not monitor that reclosing exports when switching coincidence
The state of pressing plate.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind can accurately monitor protection exit pressing plate
The monitoring method of the relay protection outlet pressing plates of states such as investment, leakage investment, virtual connection.
Technical scheme is as follows:
A kind of monitoring method of relay protection outlet pressing plate obtains trip protection output clamping, reclosing output clamping
The investment voltage signal of lower end connecting column, when investment voltage signal reflection trip protection output clamping, reclosing output clamping are
When investment, output investment status information；When investment voltage signal reflection trip protection output clamping, reclosing output clamping are leakage
When investment or virtual connection, no output puts into voltage signal；The investment shape of relay protection outlet pressing plate is monitored by investment status information
State.
Preferably, the lower end connecting column of trip protection output clamping, reclosing output clamping is separately connected voltage conversion
Light coupling relay is arranged in circuit, voltage translation circuit；It is defeated when trip protection output clamping, reclosing output clamping are investment
Voltage signal, light coupling relay conducting are put into out, and then export investment status information；When trip protection output clamping, reclosing
When output clamping is leakage investment or virtual connection, no output puts into voltage signal, light coupling relay cut-off, output investment fault-signal.
Preferably, voltage translation circuit includes negative electricity conversing circuits, positive electricity conversing circuits, led to by cascade triode
The conducting and cut-off of disconnected control light coupling relay.
Preferably, negative electricity conversing circuits include two cascade NPN triodes, the light coupling relay of negative electricity conversing circuits
Input cathode connection NPN triode collector；Positive electricity conversing circuits include a NPN triode, positive electricity conversing circuits
Light coupling relay input cathode connection NPN triode collector.
Preferably, the lower end connecting column of trip protection output clamping, reclosing output clamping exports respectively in investment
Negative electricity, positive electricity.
Preferably, control power supply negative electricity passes through breaking coil, breaker coincidence when trip protection output clamping is investment
Auxiliary node, tripping guard relay and trip protection output clamping, make the lower end binding post of trip protection output clamping be negative
Electricity.
Preferably, control power supply positive electricity is protected by tripping position relay, combined floodgate when reclosing output clamping is investment
Relay and reclosing output clamping are held, the lower end binding post positive electricity of reclosing output clamping is made.
Preferably, exporting conducting voltage signal, conducting voltage letter when the conducting of the light coupling relay of voltage translation circuit
Number judge through main control module, main control module outputting drive voltage signal, drive voltage signal is connected to the light in state output circuit
The input anode of coupling relay, light coupling relay output state voltage signal；When the light coupling relay of voltage translation circuit is cut
When only, no conducting voltage signal output, no drive voltage signal output, state output circuit output investment fault-signal.
Beneficial effects of the present invention are as follows:
The monitoring method of relay protection outlet pressing plate of the present invention, is gone out by trip protection output clamping, reclosing
Based on the investment voltage signal of the lower end connecting column of mouthful pressing plate, acquired, conversion, judgement, final output can be just
The really signal of the state of reflection trip protection output clamping, reclosing output clamping.The present invention passes through cascade triode and optocoupler
The combination of relay, the same voltage translation circuit, which can be achieved at the same time, judges leakage investment, virtual connection, can not only judge to protect
Protection unit tripping output clamping and reclosing output clamping investment situation, moreover it is possible to judge pressing plate whether virtual connection, overcome existing
Technology needs to carry out the judgement of leakage investment, virtual connection by different technological means and principle, and solves the judgement of voltage difference
Method cannot exclude the exception returned when the both ends of lock output clamping are both positive electricity.Compared with the method that image compares, this
Invent it is non-observed by external presentation, but inherently identify whether to put into successfully, recognition result is direct and accurate.
Detailed description of the invention
Fig. 1 is the present invention to realize the schematic diagram remotely monitored；
Fig. 2 is the schematic diagram of negative electricity conversing circuits；
Fig. 3 is the schematic diagram of positive electricity conversing circuits；
Fig. 4 is the schematic diagram for obtaining investment information of voltage；
Fig. 5 is the schematic diagram in state output circuit；
Fig. 6 is the schematic diagram of monitoring arrangement.
Specific embodiment
The present invention is further described in detail with reference to the accompanying drawings and embodiments.
The present invention in order to solve it is of the existing technology be unable to judge accurately whether the deficiency of virtual connection, a kind of relay is provided and is protected
Whether the monitoring method for protecting output clamping, charged by the lower end connecting column of trip protection output clamping, reclosing output clamping
It is detected and is judged, can accurately detect trip protection output clamping, reclosing output clamping for investment, leakage investment, void
It states, the monitoring center that judging result can be transmitted to distal end such as connects to be monitored on-line.As shown in Figure 1, by protective relaying device
The lower end binding post of trip protection output clamping, reclosing output clamping in operation circuit accesses monitoring arrangement, monitored dress
Measure and control device is outputed signal to after setting judgement, is reached after telemechanical apparatus by cable through dispatch data net, trip protection is exported
Pressing plate, reclosing output clamping state send to monitoring center.
The monitoring method of relay protection outlet pressing plate of the present invention is exported with trip protection output clamping, reclosing
The electrification situation of the lower end connecting column of pressing plate is obtaining trip protection output clamping, reclosing output clamping as monitoring basis
Lower end connecting column investment voltage signal after judged；When investment voltage signal reflection trip protection output clamping, it is overlapped
When lock output clamping is investment, output investment status information；When investment voltage signal reflects trip protection output clamping, reclosing
When output clamping is leakage investment or virtual connection, no output puts into voltage signal.Relay protection outlet is monitored by investment status information
The investment state of pressing plate, i.e., when trip protection output clamping, reclosing output clamping are investment, investment status information reflection is protected
Shield tripping output clamping, reclosing output clamping are investment；When trip protection output clamping, reclosing output clamping are leakage investment
Or when virtual connection, no output puts into voltage signal, and investment fault-signal reflection trip protection output clamping, reclosing output clamping are
Leakage investment or virtual connection.
In order to realize the judgement to leakage investment and virtual connection, the present invention exports trip protection by voltage conversion circuit and presses
Plate, reclosing output clamping the investment voltage signal of lower end connecting column converted, be converted to the throwing of light coupling relay output
Enter status information or investment fault-signal, as the investment state for judging trip protection output clamping, reclosing output clamping
Foundation.Trip protection output clamping, reclosing output clamping lower end connecting column be separately connected voltage translation circuit, voltage conversion
Light coupling relay is arranged in circuit；When trip protection output clamping, reclosing output clamping are investment, output investment voltage letter
Number, light coupling relay conducting, and then export investment status information；When trip protection output clamping, reclosing output clamping are leakage
When investment or virtual connection, no output puts into voltage signal, light coupling relay cut-off, output investment fault-signal.
Since the lower end connecting column of trip protection output clamping, reclosing output clamping may export positive electricity or negative electricity, it is
It is suitable for two kinds of situations, voltage translation circuit includes negative electricity conversing circuits, positive electricity conversing circuits, logical by cascade triode
The conducting and cut-off of disconnected control light coupling relay.Output negative electricity when for investment, lower end connecting column connection negative electricity convert back
Road, output positive electricity when for investment, lower end connecting column connects positive electricity conversing circuits.
In the present embodiment, when investment, the lower end connecting column of trip protection output clamping exports negative electricity, therefore, trip protection
The lower end connecting column of output clamping connects negative electricity conversing circuits.As shown in Fig. 2, negative electricity conversing circuits include two cascade NPN
Triode, the collector of the input cathode connection NPN triode of the light coupling relay OP1 of negative electricity conversing circuits.Second level NPN
The base stage of triode Q2 is connect with the lower end connecting column of trip protection output clamping, the emitter grounding of triode Q2, base stage with penetrate
Interpolar parallel connection peripheral circuit, including resistance in parallel, diode, capacitor, collector connection+12V voltage.Tri- pole first order NPN
The base stage of pipe Q1 is connect with the collector of triode Q2, the collector of triode Q1 and the input cathode of light coupling relay OP1
Connection, emitter grounding.Input anode connection+12V the voltage of light coupling relay OP1, the output head anode of light coupling relay OP1
Connection+24V voltage, negative pole of output end connect main control module.When trip protection output clamping investment, the input terminal of monitoring arrangement
For negative electricity, triode Q2 cut-off, triode Q1 is connected, and light coupling relay OP1 conducting, main control module is opened into positive electricity.When protection is jumped
When the virtual connection of lock output clamping or leakage investment, the input terminal of monitoring arrangement is out of power, triode Q2 conducting, triode Q1 cut-off, cannot
Make light coupling relay OP1 be connected, main control module without open into.
When investment, the lower end connecting column of reclosing output clamping exports positive electricity, and therefore, the lower end of reclosing output clamping connects
Connect column connection positive electricity conversing circuits.As shown in figure 3, positive electricity conversing circuits include a NPN triode, the light of positive electricity conversing circuits
The collector of the input cathode connection NPN triode of coupling relay OP2.It presses base stage and the reclosing outlet of NPN triode Q3
The lower end connecting column of plate connects, the emitter grounding of triode Q3, peripheral circuit in parallel between base stage and emitter-base bandgap grading, including electricity in parallel
Resistance, diode, capacitor, collector are connect with the input cathode of light coupling relay OP2.The input of light coupling relay OP2 is rectified
Pole connection+12V voltage, the output head anode connection+24V voltage of light coupling relay OP2, negative pole of output end connect main control module.
When reclosing output clamping investment, the input terminal of monitoring arrangement is positive electricity, and triode Q3 is connected, light coupling relay OP2 conducting,
Main control module is opened into positive electricity.When the virtual connection of reclosing output clamping or leakage investment, the input terminal of monitoring arrangement is out of power, triode Q3
Cut-off, cannot make light coupling relay OP2 be connected, main control module without open into.
In the present embodiment, trip protection output clamping, reclosing output clamping lower end connecting column investment when, respectively it is defeated
Negative electricity, positive electricity out, correspond to circuit structure, trip protection output clamping be investment when, control power supply negative electricity by breaking coil,
Breaker coincidence auxiliary node, tripping guard relay and trip protection output clamping, make the lower end of trip protection output clamping
Binding post is negative electricity.Reclosing output clamping be investment when, control power supply positive electricity by tripping position relay, close a floodgate keep after
Electric appliance and reclosing output clamping make the lower end binding post positive electricity of reclosing output clamping.
As shown in figure 4, following two circuit in parallel between the positive KM+ and cathode KM- of control power supply:
One, concatenated breaking coil TQ, breaker coincidence auxiliary node DL2, tripping guard relay TBJ and trip protection
Output clamping 1CLP1, tripping guard relay TBJ and the two sides trip protection output clamping 1CLP1 are parallel with concatenated red light HD
With closing operation position relay HWJ；
Two, concatenated closing coil HQ, breaker coincidence auxiliary node DL1, combined floodgate guard relay HBJ and reclosing go out
The two sides mouth pressing plate 1CLP2, combined floodgate guard relay HBJ and reclosing output clamping 1CLP2 are parallel with concatenated green light LD and jump
Gate position relay TWJ.
Wherein, monitoring arrangement is separately connected on the left of trip protection output clamping 1CLP1, reclosing output clamping 1CLP2
Binding post, obtain trip protection output clamping, reclosing output clamping lower end connecting column investment voltage signal.If protection
Trip output clamping 1CLP1, reclosing output clamping 1CLP2 virtual connection or leakage investment, then trip protection output clamping 1CLP1, again
The lower end binding post of combined floodgate output clamping 1CLP2 is all out of power, i.e., does not export investment voltage signal.Therefore, monitoring arrangement utilizes guarantor
Protect tripping output clamping 1CLP1, the lower end binding post of reclosing output clamping 1CLP2 is negative electricity or positive electricity to judge protective device
Whether pressing plate puts into.
In monitoring arrangement, judged by main control module, when the conducting of the light coupling relay of voltage translation circuit, output
Conducting voltage signal, conducting voltage signal judge through main control module, main control module outputting drive voltage signal, as shown in figure 5, driving
Dynamic voltage signal is connected to the input anode of the light coupling relay OP3 in state output circuit, light coupling relay OP3 output state
Voltage signal.When the light coupling relay OP3 of voltage translation circuit cut-off, no conducting voltage signal output, no driving voltage letter
Number output, state output circuit output investment fault-signal.
To sum up, the monitoring arrangement of the present embodiment is as shown in fig. 6, be to judge core with main control module, based on single-chip microcontroller progress
It realizes, main control module connects negative electricity conversing circuits, positive electricity conversing circuits, state output circuit, negative electricity conversing circuits, positive electricity conversion
Trip protection output clamping monitoring input terminal, reclosing output clamping monitoring input terminal, state output circuit is respectively set in circuit
It is provided with state output end, common end.Monitoring arrangement is additionally provided with power input and power module.When implementation, protection is filled
The lower end binding post for setting tripping output clamping or reclosing output clamping is connected to monitoring arrangement, and by negative electricity conversion module or just
Electric conversion module after main control module is just established by cable, then passes through it and outputs function, extremely through state output circuit to main control module
Measure and control device.
Above-described embodiment is intended merely to illustrate the present invention, and is not used as limitation of the invention.As long as according to this hair
Bright technical spirit is changed above-described embodiment, modification etc. will all be fallen in the scope of the claims of the invention.
Claims (5)
1. a kind of monitoring method of relay protection outlet pressing plate, which is characterized in that obtain trip protection output clamping, reclosing goes out
The investment voltage signal of the lower end connecting column of mouth pressing plate, when investment voltage signal reflection trip protection output clamping, reclosing go out
When mouth pressing plate is investment, output investment status information；When investment voltage signal reflection trip protection output clamping, reclosing outlet
When pressing plate is leakage investment or virtual connection, no output puts into voltage signal；Relay protection outlet pressing plate is monitored by investment status information
Investment state；
Trip protection output clamping, reclosing output clamping lower end connecting column be separately connected voltage translation circuit, voltage conversion
Light coupling relay is arranged in circuit；When trip protection output clamping, reclosing output clamping are investment, output investment voltage letter
Number, light coupling relay conducting, and then export investment status information；When trip protection output clamping, reclosing output clamping are leakage
When investment or virtual connection, no output puts into voltage signal, light coupling relay cut-off, output investment fault-signal；
Voltage translation circuit includes negative electricity conversing circuits, positive electricity conversing circuits, controls optocoupler by the on-off of cascade triode
The conducting and cut-off of relay；Negative electricity conversing circuits include two cascade NPN triodes, the optocoupler relay of negative electricity conversing circuits
The collector of the input cathode connection NPN triode of device；Positive electricity conversing circuits include a NPN triode, and positive electricity converts back
The collector of the input cathode connection NPN triode of the light coupling relay on road.
2. the monitoring method of relay protection outlet pressing plate according to claim 1, which is characterized in that trip protection outlet pressure
Plate, reclosing output clamping lower end connecting column investment when, respectively export negative electricity, positive electricity.
3. the monitoring method of relay protection outlet pressing plate according to claim 2, which is characterized in that trip protection outlet pressure
When plate is investment, control power supply negative electricity is jumped by breaking coil, breaker coincidence auxiliary node, tripping guard relay and protection
Lock output clamping makes the lower end binding post negative electricity of trip protection output clamping.
4. the monitoring method of relay protection outlet pressing plate according to claim 2, which is characterized in that reclosing output clamping
When to put into, control power supply positive electricity makes to be overlapped by tripping position relay, combined floodgate guard relay and reclosing output clamping
The lower end binding post of lock output clamping is positive electricity.
5. the monitoring method of relay protection outlet pressing plate according to claim 1, which is characterized in that work as voltage translation circuit
Light coupling relay conducting when, export conducting voltage signal, conducting voltage signal judges through main control module, and main control module output is driven
Dynamic voltage signal, drive voltage signal are connected to the input anode of the light coupling relay in state output circuit, light coupling relay
Output state voltage signal；When the cut-off of the light coupling relay of voltage translation circuit, no conducting voltage signal output, no driving electricity
Press signal output, state output circuit output investment fault-signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710187709.0A CN106841876B (en) | 2017-03-27 | 2017-03-27 | A kind of monitoring method of relay protection outlet pressing plate |
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| CN201710187709.0A CN106841876B (en) | 2017-03-27 | 2017-03-27 | A kind of monitoring method of relay protection outlet pressing plate |
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| CN106841876B true CN106841876B (en) | 2019-07-09 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782094A (en) * | 2019-02-14 | 2019-05-21 | 南京汇创电力科技有限公司 | A kind of relay protection tripping output clamping in-service monitoring method |
| CN111458633B (en) * | 2020-04-28 | 2022-03-04 | 广东电网有限责任公司揭阳供电局 | Tripping and closing monitoring circuit and fault alarming method |
| CN112908747B (en) * | 2020-11-11 | 2022-08-12 | 国家电网有限公司 | Intelligent novel relay protection tripping outlet pressing plate capable of preventing accidental switching |
| CN112904115B (en) * | 2021-01-20 | 2022-11-29 | 成都可为科技股份有限公司 | Pressing plate state monitoring circuit and monitoring method |
| CN115267484A (en) * | 2022-05-27 | 2022-11-01 | 国网江苏省电力有限公司南通供电分公司 | Fault monitoring method and system for relay protection operation circuit |
| CN116381396B (en) * | 2023-06-05 | 2023-10-27 | 广东电网有限责任公司佛山供电局 | Intelligent monitoring system for transformer substation outlet pressing plate |
| CN116774629B (en) * | 2023-06-16 | 2024-01-23 | 国网江苏省电力有限公司泰州供电分公司 | Intelligent monitoring module and method for relay protection outlet loop number |
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