CN109633250A - One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation - Google Patents
One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation Download PDFInfo
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- CN109633250A CN109633250A CN201811334443.9A CN201811334443A CN109633250A CN 109633250 A CN109633250 A CN 109633250A CN 201811334443 A CN201811334443 A CN 201811334443A CN 109633250 A CN109633250 A CN 109633250A
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- current potential
- terminal block
- phototube coupling
- anticipation
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- 230000008878 coupling Effects 0.000 claims abstract description 25
- 238000010168 coupling process Methods 0.000 claims abstract description 25
- 238000005859 coupling reaction Methods 0.000 claims abstract description 25
- 230000001131 transforming effect Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 208000009146 rhinoscleroma Diseases 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention provides one kind to prejudge system for protection supervisory equipment terminal block current potential automatic collection in substation, detects heavy workload and low efficiency in the prior art for solving, and signal shows not intuitive, the problem of final failure needs empirical analysis that can just obtain.To this, the present invention includes one group of Phototube Coupling signal acquisition terminal row, a Phototube Coupling, which is equipped with, between two neighboring Phototube Coupling signal acquisition terminal row acquires terminal, each Phototube Coupling signal acquisition terminal row connection current potential prejudges analytical equipment in this group of Phototube Coupling signal acquisition terminal row, and current potential prejudges analytical equipment and connects digital signal interface.Technical solution in this way, automatic batch acquisition protection observing and controlling terminal block current potential of the present invention reduce change inspection person works' amount, promote working efficiency；It realizes and discriminatory analysis is carried out to collected current potential, automatically analyze fault zone by entirely shielding key terminals row current potential in cabinet, promote service work efficiency.
Description
Technical field
The present invention relates to protection supervisory equipments in substation, and in particular to one kind is for protection supervisory equipment end in substation
Son row's current potential automatic collection prejudges system.
Background technique
In substation protection supervisory equipment have in substation, the assembly protection of low-pressure side and measurement monitoring function.Both may be used
To disperse to install on the spot, group screen can also be concentrated.It is to constitute the power station integrated automation systems such as substation, Auxiliary System in Power Plant
Ideal smart machine device.Also there are protection supervisory equipment, such as Patent No. in mature substation in the prior art
A kind of transforming plant protecting monitoring is disclosed in 201420806545.7 utility model patent " transforming plant protecting monitoring system "
System, comprising: the number one point of transforming plant protecting device, terminal block, main transformer measure and control device, the transforming plant protecting device passes through
Feed cable is connect with the first terminal of the terminal block, the first terminal of the terminal block by feed cable with it is described
The power supply terminal of main transformer measure and control device connects, and No. second point of the transforming plant protecting device passes through scleroma point cable and the end
The Second terminal connection of son row, the Second terminal of the terminal block pass through the third end of cable and the main transformer measure and control device
Son connection.Communicating interrupt caused by the utility model scheme is solved the problems, such as because of CPU card aging.
Observing and controlling inner terminal row is protected to be only used for interior wiring and external cable but in common use process, in substation
Connection function, when occur substation in abnormal signal when, need power transformation personnel to survey manually to the terminal using multimeter
Examination, could read data in terminal block, judge abnormal signal generation area；When a point failure causes multiple signals exception, need
Multiple terminal block current potentials in screen cabinet are measured, and carry out analysis by change inspection personnel and infer abnormal signal generation area.This
The detection heavy workload and low efficiency of sample.When abnormal signal, change inspection personnel need to compare drawing and find the function terminal, need to become
Inspection personnel have certain working experience, can understand design drawing；If it is insufficient to become inspection personnel experience, judge that the abnormal signal needs
It devotes a tremendous amount of time.
Summary of the invention
To solve the above-mentioned problems, the present invention provides one kind for protection supervisory equipment terminal block current potential in substation from
Dynamic acquisition anticipation system, detects heavy workload in the prior art for solution and low efficiency, signal shows not intuitive, final failure
The problem of needing empirical analysis that can just obtain.
One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation, is mounted on substation guarantor
It protects in observing and controlling screen cabinet, including one group of Phototube Coupling signal acquisition terminal row, two neighboring Phototube Coupling signal acquisition terminal arrange it
Between be equipped with Phototube Coupling and acquire terminal, each Phototube Coupling signal acquisition terminal in this group of Phototube Coupling signal acquisition terminal row
Son row's connection current potential prejudges analytical equipment, and current potential prejudges analytical equipment and connects digital signal interface.
Preferably, the Phototube Coupling acquisition terminal is made of the photoelectrical coupler being arranged in pairs, wherein first group of photoelectricity
Coupler is by the first light emitting diode D1 and the first photodiode L1；Second group of photoelectrical coupler by and light emitting diode D2
It is formed with the second photodiode L2 and the light emitting diode D1 and D2 including being arranged in pairs, the first light emitting diode D1 and second
The anode of light emitting diode D2 is connected and is connected on outer signal.The photoelectrical coupler being arranged in pairs is able to cooperate a variety of feelings of processing
Condition.
Wherein, the cathode of the first light emitting diode D1 is connected to the end 0V.
Meanwhile second the cathode of light emitting diode D2 be connected to the end -110V.
Preferably, voltage anticipation device is compared current potential by logic circuit, for judging the position of the switch, plug-in strip position
Whether in place the intake set, and judges whether there is the failures such as control loop template.
Preferably, voltage anticipation device will be sent to backstage or collection device by logic circuit in collection voltages.
Preferably, collected current potential is converted digital signal by the digital signal interface, passes through binary mode reality
When be stored in interface.
Technical solution in this way, the beneficial effect that the present invention has include:
1, automatic batch acquisition protection observing and controlling terminal block current potential reduces change inspection person works' amount, promotes working efficiency；
2, using Phototube Coupling acquisition mode, improve voltage sample reliability, with original signal circuit accomplished effectively every
From；
3, current potential is input to current potential anticipation device using 24V light current form, improves current potential anticipation device reliability；
4, it is able to achieve and discriminatory analysis is carried out to collected current potential, divided automatically by entirely shielding key terminals row current potential in cabinet
Fault zone is analysed, service work efficiency is promoted.
Detailed description of the invention
Fig. 1 is the block diagram that the present invention is mounted in transforming plant protecting observing and controlling screen cabinet；
Fig. 2 is the double-layer structure figure of the embodiment of the present invention；
Fig. 3 judges the position of the switch less than bit comparison work-based logic relation schematic diagram for the embodiment of the present invention by logic gate；
Fig. 4 judges work-based logic relation schematic diagram by logic gate control loop template for the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention.
One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation, is mounted on substation guarantor
It protects in observing and controlling screen cabinet 1.As shown in Figure 1, including one group of Phototube Coupling signal acquisition terminal row 2, two neighboring Phototube Coupling signal
It acquires and is equipped with a Phototube Coupling acquisition terminal 3 between terminal block 2, each light in this group of Phototube Coupling signal acquisition terminal row 2
It is electrically isolated 2 connection current potential of signal acquisition terminal row and prejudges analytical equipment 4, current potential prejudges analytical equipment 4 and connects digital signal interface
5.Voltage anticipation device is compared current potential by logic circuit, for judging that the intake of the position of the switch, plug-in strip position is
It is no in place, and judge whether there is control loop template failure.Voltage prejudges device will be in collection voltages by logic circuit
It send to backstage or collection device.Collected current potential is converted digital signal by the digital signal interface 5, passes through binary system
Mode real-time storage is in interface.
The Phototube Coupling acquisition terminal 3 is made of the photoelectrical coupler being arranged in pairs as shown in Figure 2, wherein first group of light
Electric coupler is by the first light emitting diode D1 and the first photodiode L1；Second group of photoelectrical coupler by and light emitting diode
D2 and the second photodiode L2 composition and the light emitting diode D1 and D2 including being arranged in pairs, the first light emitting diode D1 and the
The anode of two light emitting diode D2 is connected and is connected on outer signal.The cathode of first light emitting diode D1 is connected to the end 0V.
The cathode of second light emitting diode D2 is connected to the end -110V.
3 pairs of Phototube Coupling signal acquisition terminals of Phototube Coupling collection terminal are arranged 2 voltages and are acquired when work, utilize photoelectricity
Direct current signal is become 24v signal power source by isolation signals device, wherein output+12V voltage after+110V voltage acquisition, 0V voltage
0V voltage, output -12V voltage after -110V voltage acquisition are exported after acquisition.When outer signal is 110V, D1 and D2 are led simultaneously
Logical ,+12V power supply is formed into a loop output 12V power supply by L1 at this time；When outer signal is 0V, D2 is simultaneously turned on, at this time+12V
Power supply is divided by L2 and negative supply, exports 0V power supply；When outer signal is -110V, D1 and D2 are not turned on, by -12V electricity
Source is exported to Vout.
Current potential anticipation analytical equipment 4 collection voltages are judged, on send function.Judgement is by comparing current potential
Compared with judging whether that the position of the switch is not in place, the problems such as control loop template.On send function be will be sent in collection voltages to backstage or
Person's collection device, easy access personnel remotely judge abort situation.Including following functions:
1 as shown in figure 3, judge that the position of the switch works less than bit comparison by logic gate.
2 as shown in figure 4, judge work by logic gate control loop template.
VHDL language realization can be used in the above method, can also pass through chip microcontroller.
Pass through journey on 3 and digital signal interface 5 be output to by sampling hold circuit, a sampling hold circuit by input,
Output port, several part compositions such as switching switch and holding capacitor.Digital signal interface 5 mainly turns collected current potential
Digital signal is turned to, through binary mode real-time storage at digital signal interface 5, is acquired convenient for external device (ED).Standard letter
Number it is connected with capture card, A/D converter carries out AD variation to input signal, obtains having functional relation generally with input voltage, electric current
It is the digital quantity of direct ratio or unary linear relation, as long as being converted into digital signal, conversion is after digital signal in storage to ROM
Stamp markers in face, so that it may above send, interface communication uses ready-made Ethernet acquisition module.
Structure of the invention is simple, and operating process can be real on the protection observing and controlling screen 6 in transforming plant protecting observing and controlling screen cabinet 1
When detect.It reads, while the present invention has digital signal interface 5, can be used for outer convenient for being concentrated to signal in protection observing and controlling screen 6
Portion's instrument batch is read, and is above sent to monitoring backstage and scheduling station, is realized remote service.Transforming plant protecting observing and controlling screen cabinet 1 simultaneously
Monitoring for protection device 7 is inside additionally provided with for taking precautions against failure.
Claims (7)
1. one kind prejudges system for protection supervisory equipment terminal block current potential automatic collection in substation, it is mounted on transforming plant protecting
In observing and controlling screen cabinet (1), it is characterised in that: arrange (2) including one group of Phototube Coupling signal acquisition terminal, two neighboring Phototube Coupling letter
Phototube Coupling is equipped between number acquisition terminal block (2) and acquires terminal (3), this group of Phototube Coupling signal acquisition terminal arranges (2)
In each Phototube Coupling signal acquisition terminal row (2) connection current potential anticipation analytical equipment (4), current potential prejudges analytical equipment (4) even
Connect digital signal interface (5).
2. a kind of for protection supervisory equipment terminal block current potential automatic collection anticipation system in substation according to claim 1
System, it is characterised in that: Phototube Coupling acquisition terminal (3) is made of the photoelectrical coupler being arranged in pairs, wherein first group of light
Electric coupler is by the first light emitting diode D1 and the first photodiode L1；Second group of photoelectrical coupler by and light emitting diode
D2 and the second photodiode L2 composition and the light emitting diode D1 and D2 including being arranged in pairs, the first light emitting diode D1 and the
The anode of two light emitting diode D2 is connected and is connected on outer signal.
3. a kind of for protection supervisory equipment terminal block current potential automatic collection anticipation system in substation according to claim 2
System, it is characterised in that: the cathode of the first light emitting diode D1 is connected to the end 0V.
4. a kind of for protection supervisory equipment terminal block current potential automatic collection anticipation system in substation according to claim 2
System, it is characterised in that: the cathode of the second light emitting diode D2 is connected to the end -110V.
5. a kind of for protection supervisory equipment terminal block current potential automatic collection anticipation system in substation according to claim 1
System, it is characterised in that: voltage anticipation device is compared current potential by logic circuit, for judging the position of the switch, plug-in strip position
Whether in place the intake set, and judges whether there is control loop template failure.
6. a kind of for protection supervisory equipment terminal block current potential automatic collection anticipation system in substation according to claim 5
System, it is characterised in that: voltage anticipation device will be sent to backstage or collection device by logic circuit in collection voltages.
7. a kind of for protection supervisory equipment terminal block current potential automatic collection anticipation system in substation according to claim 1
System, it is characterised in that: collected current potential is converted digital signal by the digital signal interface (5), passes through binary mode
Real-time storage is in interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811334443.9A CN109633250A (en) | 2018-11-09 | 2018-11-09 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811334443.9A CN109633250A (en) | 2018-11-09 | 2018-11-09 | One kind prejudging system for protection supervisory equipment terminal block current potential automatic collection in substation |
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Family
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|---|---|---|---|
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