CN205103334U - Measure direct current system interchange and scurry direct current detection device - Google Patents
Measure direct current system interchange and scurry direct current detection device Download PDFInfo
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- CN205103334U CN205103334U CN201520854888.5U CN201520854888U CN205103334U CN 205103334 U CN205103334 U CN 205103334U CN 201520854888 U CN201520854888 U CN 201520854888U CN 205103334 U CN205103334 U CN 205103334U
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- 238000001514 detection method Methods 0.000 title abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229940074869 marquis Drugs 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- VBUNOIXRZNJNAD-UHFFFAOYSA-N ponazuril Chemical compound CC1=CC(N2C(N(C)C(=O)NC2=O)=O)=CC=C1OC1=CC=C(S(=O)(=O)C(F)(F)F)C=C1 VBUNOIXRZNJNAD-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to an electric power system insulating monitoring technology, measure direct current system interchange and scurry direct current detection device promptly. Its detection circuitry is relay, the amorphous iron core magnetic coupling who inserts adjustment measuring resistance at direct current system just or in the negative busbar, amorphous iron core magnetic coupling meets signal amplifier. The measurement accuracy of this application through improving the number of turns on the iron core that once inclines, secondary side, the alternating current signal who realizes 50Hz reliably measures 50uA and exchanges the signal of scurrying the direct current to realize the isolation of computer and system. Positive negative busbar can be superior to more than 10% ground insulation resistance, the measurement accuracy that DC signal was scurried in positive negative busbar voltage -to -ground and interchange. The on -line measuring interchange is scurried DC signal and is greater than 5v. Detection circuitry is used for measuring the line real -time supervision that the direct current was scurried in the interchange, is to solve to exchange the high precision measurement circuit of scurrying the real -time supervision of direct current, and this circuit satisfies the real -time high accuracy requirement that reaches simultaneously.
Description
Technical field
The utility model relates to power system insulation monitoring technology, namely measures straight-flow system interchange and alters DC detecting device.
Background technology
In electric system, generating plant, transformer station direct current system are the uninterrupted power sources of the power for the control of equipment, operation, signal, protection and equipment component, require reliable.And generating plant, transformer station direct current system wiring complexity, branch road extended distance is long, has ac terminal at panel box, easily occurs exchanging the problem of altering direct current.Also do not exchange the energy of altering DC detecting application at present real-time, high precision test circuit.It is exchange the testing requirement of altering direct current according to electric power standard " DC power system insulation monitoring and warning device technical conditions (DLT1392-2014) " middle proposition in 2014 that DC detecting is altered in interchange, needs again high precision test to exchange the signal of altering direct current.
Utility model content
The purpose of this utility model provides a kind of energy for above-mentioned deficiency in real time, and the measurement straight-flow system of high precision test circuit exchanges alters DC detecting device.
Technical solution of the present utility model is: a kind of measurement straight-flow system exchanges alters DC detecting device, its testing circuit is the access adjustment relay (play adjustment signal magnitude, can ensure again the reliable object of security of system) of measuring resistance, amorphous iron core magnetic coupler (be primary system and signal are isolated and signal by amplitude amplification) on straight-flow system plus or minus bus; Amorphous iron core magnetic coupler connects signal amplifier (for reaching the requirement of computer recognizing).
The utility model has the advantages that: 1, the application is by improving the measuring accuracy of the number of turn, secondary side on primary side iron core, the AC signal reliable measurements realizing 50Hz goes out 50uA and exchanges the signal of altering direct current, and realizes the buffer action of computing machine and system.2, positive and negative busbar insulation against ground resistance, the measuring accuracy that direct current signal is altered in positive and negative busbar voltage-to-ground and interchange can be better than more than 10%.3, on-line checkingi exchanges and alters direct current signal and be greater than 5v (standard 10v).4, testing circuit is for measuring the line Real-Time Monitoring exchanging and alter direct current, is solve the high-precision measurement circuit exchanging and alter the Real-Time Monitoring of direct current, and this circuit meets in real time and high-precision requirement simultaneously.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the utility model circuit principle structure sketch.
Embodiment
See Fig. 1, parts title is as follows: straight-flow system positive bus-bar 1; Straight-flow system negative busbar 2; For adjusting relay 3 or the 3' of measuring resistance; Isolation and signal amplifier 4 or 4 '; Amorphous iron core magnetic coupler 5 or 5'; 6,6'-earth point connects the earth; 7,7'-positive and negative busbar exchanges and alters DC signal output point.
Identical see positive and negative busbar detection method in Fig. 1, Fig. 1.Measure straight-flow system interchange and alter DC detecting device, its testing circuit is relay 3 or 3', amorphous iron core magnetic coupler 5 or the 5' of access adjustment measuring resistance on straight-flow system plus or minus bus 1 or 2; Amorphous iron core magnetic coupler 5 or 5' connect isolation and signal amplifier 4 or 4 ' (AD620).Amorphous iron core magnetic coupler 5 or 5' are for straight-flow system and computing machine is isolated and signal amplifies.
Electromagnetic coupler once and the secondary number of turn can not be confined to the fixing number of turn according to system requirements.This circuit application amorphous is magnetic permeability higher material, but other material also can substitute not as this material.
Principle of work is as follows: this circuit is that Real-Time Monitoring exchanges the on-line checkingi circuit of altering direct current, when generation blow-up is fled into marquis during direct current branch, the branch road declined through insulation again by DC bus is flowed to the earth (the earth and neutral point are altogether), at this moment, alter into alternating current will shunt on sampling coil, iron-core coil adopts the amorphous iron core of high magnetic property, sampling coil can be told 50uA alter into alternating current, such resolution is much better than the index that standard mentions 10V, realizes the object of on-line measurement.
Claims (1)
1. measure straight-flow system to exchange and alter a DC detecting device, it is characterized in that its testing circuit is at the relay (3 or 3') of straight-flow system plus or minus bus (1 or 2) upper access adjustment measuring resistance, amorphous iron core magnetic coupler (5 or 5'); Amorphous iron core magnetic coupler (5 or 5') connects signal amplifier (4 or 4 ').
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520854888.5U CN205103334U (en) | 2015-10-29 | 2015-10-29 | Measure direct current system interchange and scurry direct current detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520854888.5U CN205103334U (en) | 2015-10-29 | 2015-10-29 | Measure direct current system interchange and scurry direct current detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205103334U true CN205103334U (en) | 2016-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520854888.5U Active CN205103334U (en) | 2015-10-29 | 2015-10-29 | Measure direct current system interchange and scurry direct current detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205103334U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242146A (en) * | 2015-10-29 | 2016-01-13 | 国家电网公司 | AC-sneaking-into-DC detection apparatus for measuring DC system |
-
2015
- 2015-10-29 CN CN201520854888.5U patent/CN205103334U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242146A (en) * | 2015-10-29 | 2016-01-13 | 国家电网公司 | AC-sneaking-into-DC detection apparatus for measuring DC system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |