CN208188307U - 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
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- CN208188307U CN208188307U CN201820420574.8U CN201820420574U CN208188307U CN 208188307 U CN208188307 U CN 208188307U CN 201820420574 U CN201820420574 U CN 201820420574U CN 208188307 U CN208188307 U CN 208188307U
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- wire clamp
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- earth
- route selection
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Abstract
The utility model relates to the technical fields of transformer station direct current system maintenance, more specifically, it is related to a kind of transformer station direct current system insulation route selection tester, earth bus switching circuit, wire clamp conduction detection circuit and earth current control loop including sequential connection, the earth bus switching circuit take electricity from DC bus by scalable conducting wire；Wire clamp conduction detection circuit includes several wire clamp jacks, being capable of the first wire clamp for connecting 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 connecting with DC feeder cabinet grounding copper bar of grafting in the earth jack；Trimmable resistance is connected between the earth bus switching circuit and wire clamp conduction detection circuit；Adjustable resistance is connected between the earth bus switching circuit and wire clamp conduction detection circuit.The utility model is not necessarily to multiple-contact DC bus and leakage current sensor during the test, can reduce empirical risk, improves working efficiency, can be realized safety and takes electricity；And structure is simple, easily fabricated, occupies little space, and has preferable portability.
Description
Technical field
The utility model relates to the technical fields of transformer station direct current system maintenance, stand erectly more particularly, to a kind of power transformation
Streaming system insulation route selection tester.
Background technique
Direct current 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 prison when DC load branch insulation reduces, installed in direct current system can be effectively examined
Surveying device can correctly alert.Currently, homemade simple test for ground conducting wire is used in the work of teams and groups' direct current regular inspection, in test process
In need multiple-contact DC bus, and test lead is passed through into narrow branch and is leaked electricity CT, test process risk is big, working efficiency
It is low.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of transformer station direct current system insulation route selection
Tester is grounded bus using change-over switch and selects, and connects ground resistance adjusting, improves transformer station direct current system insulation
Route selection test efficiency reduces the risk that test process accidentally touches DC bus, it is ensured that personal equipment safety.
In order to solve the above technical problems, the technical solution adopted in the utility model 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 mother
Line, negative DC bus and be connected to positive direct-current bus, the DC loop on negative DC bus, the DC loop it is positive and negative go out
Around equipped with several leakage current sensors on line；The insulation route selection tester includes that the earth bus being linked in sequence switches back into
Road, wire clamp conduction detection circuit and earth current control loop, the earth bus switching circuit by scalable conducting wire from
DC bus takes electricity；Wire clamp conduction detection circuit includes several wire clamp jacks, being capable of grafting and leakage in the wire clamp jack
First wire clamp of current sensor connection；The earth current control loop includes earth jack, can in the earth jack
The second wire clamp that grafting is connect with DC feeder cabinet grounding copper bar；The earth bus switching circuit and wire clamp conduction detection circuit
Between be connected with adjustable resistance.
The transformer station direct current system insulation route selection tester of the utility model, carries out insulation route selection using leakage current injection method
Experiment can tentatively judge the insulation situation of each branch of direct current system: work as dress by detecting the output signal of each branch sensor
When setting operation, the signal of real-time detection leakage current sensor output flows through leakage current sensor when branch insulation situation is normal
Size of current it is equal, contrary, output signal zero；When branch has ground connection, leakage current sensor has poor stream to flow through,
The output of leakage current sensor is not zero.The present invention takes electricity from positive direct-current bus or negative DC bus by scalable conducting wire, benefit
It is grounded the selection of bus with earth bus switching circuit, and is inserted into wire clamp jack by the first wire clamp and is sensed with leakage current
Earth current, is passed through the electricity leakage sensor of each direct current branch by device connection, adjustable resistance adjustment earth current is aided in, to reach
To the test requirements document of direct current system insulation route selection；The present invention is not necessarily to multiple-contact DC bus during the test and spreads with electric leakage
Sensor can reduce empirical risk, improve working efficiency, and can be realized safety and take 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 being grounded with the negative DC bus of non-moving end conduct either analog.Pass through single-pole three-throw switch
The operating mode that insulation route selection experimental rig can be switched fast is set, is respectively as follows: the mode of simulation positive direct-current busbar grounding, surveys
The mode in test clip conduction detection circuit and the mode of the negative DC bus ground connection of simulation.
Further, the first jack, the third contact and negative direct current are equipped between first contact and positive direct-current bus
Bus 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.The company with positive direct-current bus, negative DC bus will can be realized in the first jack of third wire clamp insertion, the second jack
Logical, operation is not necessarily to multiple-contact DC bus, can reduce the security risk of test 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 verifying insulation route selection is complete.
Further, wire clamp conduction detection circuit includes three groups of detection branch, 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 second branch, the wire clamp jack include the first wire clamp jack in the first branch and in second branch
Second wire clamp jack.
Further, the first branch include be connected in series first resistor and the first indicator light, described second
Road includes the second resistance being connected in series 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, indicates that the first wire clamp closure of the first branch is intact；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, indicates that the first wire clamp closure of second branch is intact.
Further, the both ends of the first wire clamp jack are equipped with the first short circuit for being shorted the first wire clamp jack and open
It closes, the both ends of the second wire clamp jack are equipped with the second shorting switch for being shorted the second wire clamp jack.When do not need using
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
It presss from both sides jack to be shorted, 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 bus, the first indicator light is bright；When earth bus switching circuit switches to negative DC bus
When, the second indicator light is bright；The DC bus for dividing earth bus switching circuit to be 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 bus switching circuit switches to positive direct-current bus, 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 utility model has the beneficial effects that
(1) the utility model takes electricity from positive direct-current bus or negative DC bus by scalable conducting wire, utilizes earth bus
Switching circuit is grounded the selection of bus, and is inserted into wire clamp jack by the first wire clamp and is connect with leakage current sensor, will
Earth current passes through the electricity leakage sensor of each direct current branch, adjustable resistance adjustment earth current is aided in, to reach direct current system
The test requirements document of system insulation route selection；It is not necessarily to multiple-contact DC bus and leakage current sensor during the test, reduces test
Risk improves working efficiency, and can be realized safety and take electricity.
(2) for the utility model before carrying out insulation route selection operation, whether the function that can effectively verify insulation route selection is complete,
Improve the accuracy of insulation route selection test.
Detailed description of the invention
Fig. 1 is the schematic diagram of the transformer station direct current system insulation route selection tester of the utility model.
Specific embodiment
The utility model is further described With reference to embodiment.Wherein, being given for example only property of attached drawing
Illustrate, expression is only schematic diagram, rather than pictorial diagram, should not be understood as the limitation to this patent；In order to which this reality is better described
With novel embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To ability
For field technique personnel, 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 utility model embodiment；It is practical at this
In novel description, it is to be understood that if the orientation or positional relationship for having the instructions such as term " on ", "lower", "left", "right" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore retouch in attached drawing
The term for stating positional relationship only for illustration, should not be understood as the limitation to this patent, for the common skill of this field
For art personnel, the concrete meaning of above-mentioned term can be understood 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 utility model, power transformation
Streaming system of standing erectly includes positive direct-current bus 1, negative DC bus 2 and is connected to positive direct-current bus 1, straight on negative DC bus 2
Road is flowed back to, is surround in the positive and negative outlet of DC loop and is equipped with several leakage current sensors；Insulation route selection tester includes that sequence connects
Earth bus switching circuit 3, wire clamp conduction detection circuit 4 and the earth current control loop 5 connect, earth bus switching circuit
3 take electricity from DC bus by scalable conducting wire；Wire clamp conduction detection circuit 4 includes several wire clamp jacks, energy in wire clamp jack
The first wire clamp that enough grafting are connect with leakage current sensor；Earth current control loop 5 includes earth jack 51, earth jack 51
In being capable of the second wire clamp for being connect with DC feeder cabinet grounding copper bar of grafting；Earth bus switching circuit 3 and wire clamp conduction detection
Adjustable resistance 6 is connected between circuit 4.
The present embodiment takes electricity from positive direct-current bus 1 or negative DC bus 2 by scalable conducting wire when implementing, using connecing
Ground bus switching circuit 3 is grounded the selection of bus, 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 direct current 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 being grounded with the negative DC bus of non-moving end conduct either analog；First contact 32 and positive direct-current bus
The first jack 35 is equipped between 1, third contact 34 and negative DC bus part 2 are equipped with the second jack 36, the first jack 35, the second jack
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 is respectively as follows: mode, the test clamp conducting inspection of simulation positive direct-current busbar grounding
The mode on survey time road and the mode of the negative DC bus ground connection of simulation.
As shown in Figure 1, wire clamp conduction detection circuit 4 includes whether three groups be closed intact detection branch 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 second branch, wire clamp jack include the first wire clamp jack 41 in the first branch and are set to second branch
On the second wire clamp jack 42；The first branch includes the first resistor 44 being connected in series and the first indicator light 45, second branch
Second resistance 46 and the second indicator light 47 including series connection.When closing the switch, the first wire clamp is inserted into the first wire clamp jack
And when 41 closure, the first indicator light 45 is bright, indicates that the first wire clamp closure of the first branch is intact；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, indicates that the first wire clamp closure of second branch is intact.
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 direct current systems, and can with multimeter measurement
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 bus,
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 embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (10)
- The route selection tester 1. a kind of transformer station direct current system insulate, the transformer station direct current system include positive direct-current bus (1), bear DC bus (2) and it is connected to positive direct-current bus, the DC loop on negative 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) electricity is taken from DC bus by scalable conducting wire；Wire clamp conduction detection circuit (4) includes several wire clamp jacks, described 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) includes connecing Ground jack (51), being capable of the second wire clamp for connecting with DC feeder cabinet grounding copper bar of grafting in the earth jack (51)；It is described Adjustable resistance (6) are connected between earth bus switching circuit (3) and wire clamp conduction detection circuit (4).
- 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) includes single-pole three-throw switch, the single-pole three-throw switch include non-moving end (31), with non-moving end conduct either analog just The first contact (32) of DC bus ground connection, with second contact (33) in non-moving end continuity test wire clamp conduction detection circuit and With the third contact (34) of the negative DC bus ground connection of non-moving end conduct either analog.
- The route selection tester 3. transformer station direct current system according to claim 2 insulate, which is characterized in that first contact (32) the first jack (35) are equipped between positive direct-current bus (1), the third contact (34) and negative DC bus part are equipped with second Jack (36) can be plugged with the of conducting earth bus switching circuit in first jack (35), the second jack (36) 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) include it is several be used for whether the first wire clamp to be closed intact detection branch, 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 the first branch and second branch that are connected in parallel in power supply, switch ends, the wire clamp jack The first wire clamp jack (41) including being set in the first branch and the second wire clamp jack (42) in second branch.
- The route selection tester 7. transformer station direct current system according to claim 6 insulate, which is characterized in that the first branch First resistor (44) and the first indicator light (45) including series connection, the second branch include the second electricity being connected in series Hinder (46) and the 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 The both ends of jack (41) are equipped with the first shorting switch (48) for being shorted the first wire clamp jack, the second wire clamp jack (42) Both ends be equipped with for being shorted the second shorting switch (49) of the second wire clamp jack.
- The route selection tester 9. transformer station direct current system according to any one of claims 1 to 8 insulate, which is characterized in that institute Stating 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 straight The 4th indicator light (53) of busbar grounding is flowed, the third indicator light (52), the 4th indicator light (53) are connected in parallel.
- The route selection tester 10. transformer station direct current system according to claim 9 insulate, which is characterized in that the third refers to Show that lamp (52) are red indicating light, the 4th indicator light (53) is blue indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820420574.8U CN208188307U (en) | 2018-03-27 | 2018-03-27 | A kind of transformer station direct current system insulation route selection tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820420574.8U CN208188307U (en) | 2018-03-27 | 2018-03-27 | A kind of transformer station direct current system insulation route selection tester |
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| Publication Number | Publication Date |
|---|---|
| CN208188307U true CN208188307U (en) | 2018-12-04 |
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| CN201820420574.8U Active CN208188307U (en) | 2018-03-27 | 2018-03-27 | A kind of transformer station direct current system insulation route selection tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108549044A (en) * | 2018-03-27 | 2018-09-18 | 广东电网有限责任公司中山供电局 | A kind of transformer station direct current system insulation route selection tester |
-
2018
- 2018-03-27 CN CN201820420574.8U patent/CN208188307U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108549044A (en) * | 2018-03-27 | 2018-09-18 | 广东电网有限责任公司中山供电局 | A kind of transformer station direct current system insulation route selection tester |
| CN108549044B (en) * | 2018-03-27 | 2023-08-25 | 广东电网有限责任公司中山供电局 | Insulation line selection tester for direct current system of transformer substation |
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