CN108549044A - A kind of transformer station direct current system insulation route selection tester - Google Patents
A kind of transformer station direct current system insulation route selection tester Download PDFInfo
- Publication number
- CN108549044A CN108549044A CN201810260627.9A CN201810260627A CN108549044A CN 108549044 A CN108549044 A CN 108549044A CN 201810260627 A CN201810260627 A CN 201810260627A CN 108549044 A CN108549044 A CN 108549044A
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- wire clamp
- jack
- earth
- route selection
- transformer station
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to the technical fields that transformer station direct current system is safeguarded, more specifically, it is related to a kind of transformer station direct current system insulation route selection tester, including earth bus switching circuit, wire clamp conduction detection circuit and the earth current control loop being linked in sequence, the earth bus switching circuit takes electricity by scalable conducting wire from DC bus；Wire clamp conduction detection circuit includes several wire clamp jacks, being capable of the first wire clamp for being connect with leakage current sensor of grafting in the wire clamp jack；The earth current control loop includes earth jack, being capable of the second wire clamp for being connect with DC feeder cabinet grounding copper bar of grafting in the earth jack；It is connected with trimmable resistance between the earth bus switching circuit and wire clamp conduction detection circuit；It is connected with adjustable resistance between the earth bus switching circuit and wire clamp conduction detection circuit.The present invention is not necessarily to multiple-contact DC bus and leakage current sensor during the test, can reduce empirical risk, improve working efficiency, can realize that safety takes electricity；And it is simple in structure, easily fabricated, it occupies little space, there is preferable portability.
Description
Technical field
The present invention relates to the technical fields that transformer station direct current system is safeguarded, more particularly, to a kind of transforming plant DC system
System insulation route selection tester.
Background technology
Straight-flow system is the important component of substation safety operation.Transformer station direct current system insulation route selection is that direct current is fixed
The important ring in work is examined, the insulation when DC load branch insulation reduces, installed in straight-flow system can effectively be examined to supervise
Surveying device can correctly alert.Currently, homemade simple test for ground conducting wire is used in teams and groups' direct current regular inspection work, in experiment process
In need multiple-contact DC bus, and pass through narrow branch to leak electricity CT test lead, experiment process risk is big, working efficiency
It is low.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of insulation route selection experiments of transformer station direct current system
Instrument is grounded busbar using change-over switch and selects, and connected ground resistance adjusting, improves transformer station direct current system insulation route selection
Test efficiency reduces the risk that experiment process accidentally touches DC bus, it is ensured that personal equipment safety.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of transformer station direct current system insulation route selection tester is provided, the transformer station direct current system includes positive direct-current busbar, bears
DC bus and it is connected to positive direct-current busbar, the DC loop on negative DC bus, in the positive and negative outlet of the DC loop
Around equipped with several leakage current sensors；The insulation route selection tester includes earth bus switching circuit, the line being linked in sequence
Conduction detection circuit and earth current control loop are pressed from both sides, the earth bus switching circuit is female from direct current by scalable conducting wire
Line takes electricity；Wire clamp conduction detection circuit includes several wire clamp jacks, in the wire clamp jack can grafting spread with electric leakage
First wire clamp of sensor connection；The earth current control loop includes earth jack, in the earth jack can grafting with
Second wire clamp of DC feeder cabinet grounding copper bar connection；Connect between the earth bus switching circuit and wire clamp conduction detection circuit
It is connected to adjustable resistance.
It is real to carry out insulation route selection using leakage current injection method for the transformer station direct current system insulation route selection tester of the present invention
It tests, by detecting the output signal of each branch sensor, can tentatively judge the insulation situation of each branch of straight-flow system：Work as device
When operation, the signal for detecting leakage current sensor output in real time flows through leakage current sensor when branch insulation situation is normal
Size of current is equal, and direction is on the contrary, its output signal is zero；When branch has ground connection, leakage current sensor has poor stream to flow through, leakage
The output of current sensor is not zero.The present invention takes electricity by scalable conducting wire from positive direct-current busbar or negative DC bus, utilizes
Earth bus switching circuit is grounded the selection of busbar, and is inserted into wire clamp jack and leakage current sensor by the first wire clamp
Earth current is passed through the electricity leakage sensor of each direct current branch by connection, adjustable resistance adjustment earth current is aided in, to reach
The test requirements document of straight-flow system insulation route selection；The present invention is not necessarily to multiple-contact DC bus and is sensed with leakage current during the test
Device can reduce empirical risk, improve working efficiency, and can realize that safety takes electricity.
Further, the earth bus switching circuit includes single-pole three-throw switch, and the single-pole three-throw switch includes not
Moved end is returned with the first contact of non-moving end conduct either analog positive direct-current busbar grounding, with non-moving end continuity test wire clamp conduction detection
Second contact on road and the third contact that DC bus ground connection is born with non-moving end conduct either analog.Pass through single-pole three-throw switch
The operating mode of insulation route selection experimental rig can be switched fast by being arranged, respectively：It simulates the pattern of positive direct-current busbar grounding, survey
The pattern of DC bus ground connection is born in the pattern in test clip conduction detection circuit and simulation.
Further, the first jack, the third contact and negative direct current are equipped between first contact and positive direct-current busbar
Busbar part is equipped with the second jack, and conducting earth bus switching circuit can be plugged in first jack, the second jack
Third wire clamp.Third wire clamp is inserted into the first jack, the second jack to the company that can be realized with positive direct-current busbar, negative DC bus
Logical, operation is not necessarily to multiple-contact DC bus, can reduce the security risk of experiment process.
Further, wire clamp conduction detection circuit includes several being used for whether the first wire clamp to be closed intact detection branch
Road, several detection branch are connected in parallel.Before carrying out insulation route selection operation, it is intact whether the first wire clamp of detection is closed, and improves exhausted
Whether the function of the accuracy of edge route selection, effectively verification insulation route selection is complete.
Further, wire clamp conduction detection circuit includes three groups of detection branch, is suitable for the exhausted of phase three-wire three circuit
Edge route selection.
Further, the detection branch includes power supply, switchs and be connected in parallel in power supply, first of switch ends
Road and the second branch, the wire clamp jack include be set to the first branch on the first wire clamp jack and in the second branch
Second wire clamp jack.
Further, the first branch includes the first resistor being connected in series with and the first indicator light, described second
Road includes the second resistance being connected in series with and the second indicator light.When the switch is closed, the first wire clamp is inserted into the first wire clamp jack
And when being closed, the first indicator light is bright, and it is intact to indicate that the first wire clamp of the first branch is closed；It is inserted when the first wire clamp is inserted into the second wire clamp
Hole and when being closed, the second indicator light is bright, and it is intact to indicate that the first wire clamp of the second branch is closed.
Further, the both ends of the first wire clamp jack are equipped with opens for the first short circuit of short circuit the first wire clamp jack
It closes, the both ends of the second wire clamp jack are equipped with the second shorting switch for short circuit the second wire clamp jack.When need not use
When the first wire clamp jack or the second wire clamp jack, then the first shorting switch or the second shorting switch are directly stirred, by corresponding line
Jack short circuit is pressed from both sides, the first indicator light or the second indicator light are bright.
Further, the earth current control loop include be used to indicate positive direct-current busbar grounding third indicator light and
It is used to indicate the 4th indicator light of negative DC bus ground connection, the third indicator light, the 4th indicator light are connected in parallel.When ground connection is female
When line switching circuit switches to positive direct-current busbar, the first indicator light is bright；When earth bus switching circuit switches to negative DC bus
When, the second indicator light is bright；Divide the DC bus that earth bus switching circuit is connected to by indicator lamp regions, it is intuitive quick.
Further, the third indicator light is red indicating light, and the 4th indicator light is blue indicator light.Work as ground connection
When busbar switching circuit switches to positive direct-current busbar, red indicating light is bright；When earth bus switching circuit switches to negative direct current mother
When line, blue indicator light is bright；The DC bus of earth bus switching circuit connection can be distinguished by color, it is convenient intuitive.
Compared with prior art, the beneficial effects of the invention are as follows：
（1）The present invention takes electricity by scalable conducting wire from positive direct-current busbar or negative DC bus, utilizes earth bus switching circuit
It is grounded the selection of busbar, and is inserted into wire clamp jack by the first wire clamp and is connect with leakage current sensor, by earth current
Across the electricity leakage sensor of each direct current branch, adjustable resistance adjustment earth current is aided in, to reach straight-flow system insulation choosing
The test requirements document of line；It is not necessarily to multiple-contact DC bus and leakage current sensor during the test, reduces empirical risk, improve
Working efficiency, and can realize that safety takes electricity.
（2）For the present invention before carrying out insulation route selection operation, whether the function that can effectively verify insulation route selection is complete, improves
The accuracy that route selection of insulating is tested.
Description of the drawings
Fig. 1 is the schematic diagram of the transformer station direct current system insulation route selection tester of the present invention.
Specific implementation mode
The present invention is further illustrated With reference to embodiment.Wherein, attached drawing only for illustration,
What is indicated is only schematic diagram rather than pictorial diagram, should not be understood as the limitation to this patent；Reality in order to better illustrate the present invention
Example is applied, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To those skilled in the art
For, the omitting of some known structures and their instructions in the attached drawings are understandable.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention；In retouching for the present invention
In stating, it is to be understood that if it is based on attached drawing to have the orientation or positional relationship of the instructions such as term "upper", "lower", "left", "right"
Shown in orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, do not indicate or imply the indicated
Device or element must have a particular orientation, with specific azimuth configuration and operation, therefore position relationship described in attached drawing
Term only for illustration, should not be understood as the limitation to this patent, for the ordinary skill in the art, can
To understand the concrete meaning of above-mentioned term as the case may be.
Embodiment 1
It is as shown in Figure 1 the first embodiment of the transformer station direct current system insulation route selection tester of the present invention, transforming plant DC system
System includes positive direct-current busbar 1, negative DC bus 2 and is connected to positive direct-current busbar 1, bears the DC loop on DC bus 2, directly
It flows back in the positive and negative outlet on road around equipped with several leakage current sensors；Insulation route selection tester includes the ground connection mother being linked in sequence
Line switching circuit 3, wire clamp conduction detection circuit 4 and earth current control loop 5, earth bus switching circuit 3 is by that can stretch
Contracting conducting wire takes electricity from DC bus；Wire clamp conduction detection circuit 4 includes several wire clamp jacks, being capable of grafting and leakage in wire clamp jack
First wire clamp of current sensor connection；Earth current control loop 5 includes earth jack 51, being capable of grafting in earth jack 51
The second wire clamp being connect with DC feeder cabinet grounding copper bar；Connect between earth bus switching circuit 3 and wire clamp conduction detection circuit 4
It is connected to adjustable resistance 6.
The present embodiment takes electricity by scalable conducting wire when implementing from positive direct-current busbar 1 or negative DC bus 2, using connecing
Ground busbar switching circuit 3 is grounded the selection of busbar, and is inserted into wire clamp jack and leakage current sensor by the first wire clamp
Earth current is passed through the electricity leakage sensor of each direct current branch by connection, adjustable resistance adjustment earth current is aided in, to reach
The test requirements document of straight-flow system insulation route selection.
Specifically, earth bus switching circuit 3 include single-pole three-throw switch, single-pole three-throw switch include non-moving end 31, with
First contact 32 of non-moving end conduct either analog positive direct-current busbar grounding, the with non-moving end continuity test wire clamp conduction detection circuit
Two contacts 33 and the third contact 34 that DC bus ground connection is born with non-moving end conduct either analog；First contact 32 and positive direct-current busbar
The first jack 35 is equipped between 1, third contact 34 is equipped with the second jack 36, the first jack 35, the second jack with negative DC bus part 2
The third wire clamp of conducting earth bus switching circuit can be plugged in 36.It can be quick by the setting of single-pole three-throw switch
The operating mode of switching insulation route selection experimental rig, respectively：Simulate pattern, the test clamp conducting inspection of positive direct-current busbar grounding
The pattern of DC bus ground connection is born in the pattern on survey time road and simulation.
As shown in Figure 1, whether wire clamp conduction detection circuit 4 is closed intact detection branch including three groups for the first wire clamp
Road, three groups of detection branch are connected in parallel；Detection branch includes power supply, switch 43 and is connected in parallel in power supply, switch ends
The first branch and the second branch, wire clamp jack include be set to the first branch on the first wire clamp jack 41 and be set to the second branch
On the second wire clamp jack 42；The first branch includes the first resistor 44 being connected in series with and the first indicator light 45, the second branch
Including the second resistance 46 being connected in series with and the second indicator light 47.When switch is closed, the first wire clamp is inserted into the first wire clamp jack
And when 41 closure, the first indicator light 45 is bright, and it is intact to indicate that the first wire clamp of the first branch is closed；When the first wire clamp is inserted into the second line
When pressing from both sides jack 42 and being closed, the second indicator light 46 is bright, and it is intact to indicate that the first wire clamp of the second branch is closed.
After wire clamp conduction detection loop-around test, the first wire clamp is clipped to the leakage current sensor that need to be tested, later
Suitable resistance value when adjustable resistance 6 is adjusted is adjusted to 7K Ω ~ 15K Ω according to different straight-flow systems, is used in combination multimeter measurement can
The actual resistance of resistance 6 is adjusted, and the resistance value of adjustable resistance 6 is adjusted to suitable resistance value.
Earth current control loop 5 includes being used to indicate the third indicator light 52 of positive direct-current busbar grounding and being used to indicate negative
4th indicator light 53 of DC bus ground connection, third indicator light 53, the 4th indicator light 54 are connected in parallel.Wherein, third indicator light
53 be red indicating light, and the 4th indicator light 54 is blue indicator light.When earth bus switching circuit switches to positive direct-current busbar,
Red indicating light is bright；When earth bus switching circuit 3 switches to negative DC bus 2, blue indicator light is bright；Pass through color
The DC bus of earth bus switching circuit connection is distinguished, it is convenient intuitive.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention
Protection domain within.
Claims (10)
- The route selection tester 1. a kind of transformer station direct current system insulate, the transformer station direct current system includes positive direct-current busbar（1）, it is negative DC bus（2）And it is connected to positive direct-current busbar, bears the DC loop on DC bus, the positive and negative outlet of the DC loop Upper surround is equipped with several leakage current sensors；It is characterized in that, the insulation route selection tester includes the ground connection mother being linked in sequence Line switching circuit（3）, wire clamp conduction detection circuit（4）And earth current control loop（5）, the earth bus switching circuit （3）By scalable conducting wire electricity is taken from DC bus；Wire clamp conduction detection circuit（4）It is described including several wire clamp jacks It being capable of the first wire clamp for being connect with leakage current sensor of grafting in wire clamp jack；The earth current control loop（5）Including connecing Ground jack（51）, the earth jack（51）In being capable of the second wire clamp for being connect with DC feeder cabinet grounding copper bar of grafting；It is described Earth bus switching circuit（3）With wire clamp conduction detection circuit（4）Between be connected with adjustable resistance（6）.
- The route selection tester 2. transformer station direct current system according to claim 1 insulate, which is characterized in that the earth bus Switching circuit（3）Including single-pole three-throw switch, the single-pole three-throw switch includes non-moving end（31）And non-moving end conduct either analog is just First contact of DC bus ground connection（32）And second contact in non-moving end continuity test wire clamp conduction detection circuit（33）And The third contact of DC bus ground connection is born with non-moving end conduct either analog（34）.
- The route selection tester 3. transformer station direct current system according to claim 2 insulate, which is characterized in that first contact （32）With positive direct-current busbar（1）Between be equipped with the first jack（35）, the third contact（34）It is equipped with second with negative DC bus part Jack（36）, first jack（35）, the second jack（36）In can be plugged with the of conducting earth bus switching circuit Three wire clamps.
- The route selection tester 4. transformer station direct current system according to claim 1 insulate, which is characterized in that the wire clamp conducting Measure loop（4）It is used for whether the first wire clamp to be closed intact detection branch including several, several detection branch are connected in parallel.
- The route selection tester 5. transformer station direct current system according to claim 4 insulate, which is characterized in that the wire clamp conducting Measure loop includes three groups of detection branch.
- The route selection tester 6. transformer station direct current system according to claim 4 insulate, which is characterized in that the detection branch Including power supply, switch（43）And be connected in parallel in power supply, switch ends the first branch and the second branch, the wire clamp jack It include the first wire clamp jack in the first branch（41）And the second wire clamp jack in the second branch（42）.
- The route selection tester 7. transformer station direct current system according to claim 6 insulate, which is characterized in that the first branch Including the first resistor being connected in series with（44）And first indicator light（45）, the second branch includes the second electricity being connected in series with Resistance（46）And second indicator light（47）.
- The route selection tester 8. transformer station direct current system according to claim 6 insulate, which is characterized in that first wire clamp Jack（41）Both ends be equipped with for short circuit the first wire clamp jack the first shorting switch（48）, the second wire clamp jack（42） Both ends be equipped with for short circuit the second wire clamp jack the second shorting switch（49）.
- 9. according to claim 1 to 8 any one of them transformer station direct current system insulation route selection tester, which is characterized in that institute State earth current control loop（5）Third indicator light including being used to indicate positive direct-current busbar grounding（52）It is negative straight with being used to indicate Flow the 4th indicator light of busbar grounding（53）, the third indicator light（52）, the 4th indicator light（53）It is connected in parallel.
- The route selection tester 10. transformer station direct current system according to claim 8 insulate, which is characterized in that the third refers to Show lamp（52）For red indicating light, the 4th indicator light（53）For blue indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810260627.9A CN108549044B (en) | 2018-03-27 | 2018-03-27 | Insulation line selection tester for direct current system of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810260627.9A CN108549044B (en) | 2018-03-27 | 2018-03-27 | Insulation line selection tester for direct current system of transformer substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108549044A true CN108549044A (en) | 2018-09-18 |
| CN108549044B CN108549044B (en) | 2023-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810260627.9A Active CN108549044B (en) | 2018-03-27 | 2018-03-27 | Insulation line selection tester for direct current system of transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108549044B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655727A (en) * | 2019-01-14 | 2019-04-19 | 安徽猎塔电缆集团有限公司 | A kind of cable extruded insulation on-line checking tagging system |
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| CN109655727A (en) * | 2019-01-14 | 2019-04-19 | 安徽猎塔电缆集团有限公司 | A kind of cable extruded insulation on-line checking tagging system |
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| Publication number | Publication date |
|---|---|
| CN108549044B (en) | 2023-08-25 |
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