CN205844452U - DC system earth fault inline diagnosis analytical equipment - Google Patents
DC system earth fault inline diagnosis analytical equipment Download PDFInfo
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- CN205844452U CN205844452U CN201620642844.0U CN201620642844U CN205844452U CN 205844452 U CN205844452 U CN 205844452U CN 201620642844 U CN201620642844 U CN 201620642844U CN 205844452 U CN205844452 U CN 205844452U
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 12
- 238000007599 discharging Methods 0.000 claims description 18
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 16
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 3
- 235000019994 cava Nutrition 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 4
- 208000032368 Device malfunction Diseases 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 208000019300 CLIPPERS Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
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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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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
This utility model is applicable to transformer station field, it is provided that a kind of DC system earth fault inline diagnosis analytical equipment, clamps including signal generator, signal receiver and signals collecting.By this utility model equipment; the insulation status level of existing transformer station direct current system can be improved; accelerate the processing speed of DC earthing; greatly reduce DC earthing and cause the chance of protection device malfunction, tripping; the operation and maintenance level of General Promotion straight-flow system; reach to improve the power supply reliability of electrical network, reduce the final purpose of electric quantity loss.
Description
Technical field
This utility model belongs to transformer station field, particularly relates to a kind of DC system earth fault inline diagnosis analysis and sets
Standby.
Background technology
Straight-flow system is to show the supply network that the equipment such as protection, control provide working power, includes accumulator, charging
Equipment, air switch or insurance and binding post, wire, insulating monitor etc..Through balance bridge resistance eutral grounding, make both positive and negative polarity over the ground
Voltage, respectively the 50% of straight-flow system voltage.When straight-flow system occurs insulation decline or earth fault, typically can make positive and negative
The raw skew of pole Hair Fixer over the ground, if the two poles of the earth insulation resistance declines on an equal basis, the most also can maintain balance, the most positive and negative extremely 1/2 bus electricity
Pressure.
Due to the high reliability request of power generation industry, must ask straight-flow system proposition is higher, it is necessary to accomplish continuously
Disconnected reliable power supply, although DC system earth fault consequence is serious: may damage power supply equipment or directly result in protection control
Control equipment misses, tripping, and operation power unit is also paid much attention to DC ground fault and processed, but the D.C. isolation monitoring run at present
The present situation of instrument, the limitation of DC earthing searching equipment, up to the present, the most also do not have system, comprehensively process DC earthing
Processing scheme, makes DC ground fault mostly process by personal experience, and time, result that different personnel process differ very
Greatly, have does not the most also process, and puzzlement Operation of Electric Systems attendant DC earthing problem for many years is the most unresolved,
In turn, because DC earthing problem causes the accident of protection device malfunction and tripping also to happen occasionally, power system is had a strong impact on
Safe and stable operation.
Utility model content
In view of the above problems, the purpose of this utility model is to provide a kind of DC system earth fault inline diagnosis to analyze
Equipment, it is intended to solve the technical problem that existing DC earthing problem has a strong impact on the safe operation of power system.
This utility model adopts the following technical scheme that
Described DC system earth fault inline diagnosis analytical equipment includes signal generator, signal receiver and signal
Gather pincers, described signal generator connect have three chucks, be respectively used to connect the positive electrode bus of straight-flow system, negative electrode bus with
And ground connection, described signals collecting pincers are connected with described signal receiver, and described signal generator includes the low frequency letter being sequentially connected with
Number there is circuit, signal output apparatus, the first Acquisition Circuit, the first A/D convertor circuit, signal recognition circuit, controller and aobvious
Display screen, described controller is additionally coupled to described low frequency signal generation circuit, and described signal output apparatus is connected to two therein
Chuck, described signal receiver includes that the second Acquisition Circuit being sequentially connected with, power amplification circuit, filter circuit, the 2nd AD turn
Change circuit, single-chip microcomputer, liquid crystal display screen, between described filter circuit and described single-chip microcomputer, be also associated with frequency identification circuit.
Further, described low frequency signal generation circuit includes integrated transporting discharging T, the electrode input end of described integrated transporting discharging T
With connection has the resistance R11 and electric capacity C2 of series connection between outfan, connect between electrode input end and the ground of described integrated transporting discharging T
There are the resistance R10 and electric capacity C3 of parallel connection, between negative input and the ground of described integrated transporting discharging T, are also associated with resistance R7, described
Low frequency signal generation circuit also includes resistance R9, diode D1, diode D2 and adjustable resistance R8, described resistance R9, diode
Connect with described adjustable resistance R8 after D1, diode D2 parallel connection, be then integrally attached to the negative input of described integrated transporting discharging T
With between outfan, wherein said diode D1, diode D2 are connected in antiparallel, the outfan conduct of described integrated transporting discharging T
The signal output part of low frequency signal generation circuit.
Further, the back side of described signal receiver caves inward and forms lower deep gouge, in both sides, described lower deep gouge top
Respectively setting a circular hole, both sides, described lower deep gouge middle and lower part are provided with chute, are additionally provided with gripper shoe in described lower deep gouge, described
Fagging includes the first plate and the second plate that rotating shaft connects, and described first both sides, plate top are respectively provided with a small column, described small column
Being inserted in the circular hole of respective side, described second plate two bottom sides is respectively provided with a slide block, and described slide block is positioned at the cunning of respective side
In groove.
The beneficial effects of the utility model are: by this utility model equipment, it is possible to increase existing transformer station direct current system
Insulation status level, accelerate the processing speed of DC earthing, greatly reduce DC earthing and cause protection device malfunction, tripping
Chance, the operation and maintenance level of General Promotion straight-flow system, reach to improve the power supply reliability of electrical network, reduce electric quantity loss
Whole purpose.
Accompanying drawing explanation
Fig. 1 is the structure chart of the DC system earth fault inline diagnosis analytical equipment that this utility model embodiment provides；
Fig. 2 is the schematic diagram of signal generator；
Fig. 3 is the schematic diagram of signal receiver；
Fig. 4 is the circuit diagram of low frequency signal generation circuit；
Fig. 5 is the structure figure of signal receiver.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
In order to technical scheme described in the utility model is described, illustrate below by specific embodiment.
Fig. 1 shows the knot of the DC system earth fault inline diagnosis analytical equipment that this utility model embodiment provides
Structure, illustrate only the part relevant to this utility model embodiment for convenience of description.
As it is shown in figure 1, the DC system earth fault inline diagnosis analytical equipment that the present embodiment provides includes that signal occurs
Device 1, signal receiver 2 and signals collecting pincers 3, described signal generator connects three chucks 4, is respectively used to connect direct current
The positive electrode bus of system, negative electrode bus and ground connection, described signals collecting pincers 3 are connected with described signal receiver 2.Such as Fig. 2 institute
Showing, described signal generator 1 includes that the low frequency signal generation circuit 11 being sequentially connected with, signal output apparatus 12, first gather electricity
Road the 13, first A/D convertor circuit 14, signal recognition circuit 15, controller 16 and display screen 17, described controller 16 is also connected with
To described low frequency signal generation circuit 11, described signal output apparatus 12 is connected to two chucks therein, as it is shown on figure 3, institute
State the second Acquisition Circuit 21 that signal receiver 2 includes being sequentially connected with, power amplification circuit 22, filter circuit the 23, the 2nd AD turn
Change circuit 24, single-chip microcomputer 25, liquid crystal display screen 26, between described filter circuit 23 and described single-chip microcomputer 25, be also associated with frequency identification electricity
Road 27.
During use, being connected with signal generator by three chucks, three chucks are respectively connecting to the positive pole mother of straight-flow system
Line, negative electrode bus and ground connection.Then opening signal generator switch, low frequency signal generation circuit output low frequency voltage, and lead to
Cross signal output apparatus output, this voltage is sampled, identified simultaneously, demonstrate current low-frequency voltage the most on a display screen
Information.Operator is by signal receiver and signals collecting clipper joint, by a signals collecting nesting bus wherein, so
After move along bus, on the branch road at earth fault place, signals collecting pincers can produce induced voltage, and signal receiver connects
Receiving induced voltage, then sample, amplify, filter, frequency identification circuit can also identify power frequency simultaneously, finally at letter
The information of induced voltage is demonstrated on the liquid crystal display screen of number receptor.So operator is according to whether have induced voltage and faradism
The size of pressure, can find earth fault, and the size of earth fault resistance to earth.
As a kind of concrete structure of described low frequency signal generation circuit, as shown in Figure 4, described low frequency signal generation circuit
Including integrated transporting discharging T, connect between electrode input end and the outfan of described integrated transporting discharging T and have resistance R11 and the electric capacity of series connection
C2, connects resistance R10 and the electric capacity C3, described integrated transporting discharging T having parallel connection between electrode input end and the ground of described integrated transporting discharging T
Negative input and ground between be also associated with resistance R7, described low frequency signal generation circuit also include resistance R9, diode D1,
Connect with described adjustable resistance R8 after diode D2 and adjustable resistance R8, described resistance R9, diode D1, diode D2 parallel connection,
Then it is integrally attached between negative input and the outfan of described integrated transporting discharging T, wherein said diode D1, diode D2
Being connected in antiparallel, the outfan of described integrated transporting discharging T is as the signal output part of low frequency signal generation circuit.Resistance R11, electricity
Hold C2 and resistance R10, electric capacity C3 and produce RC concussion, amplify output by amplifier simultaneously, by adjusting adjustable resistance R2, can adjust
The amplitude of the low frequency signal of whole output.
As a kind of lamps structure of described signal receiver, as it is shown in figure 5, the back side of described signal receiver caves inward
Forming lower deep gouge 51, respectively set a circular hole in both sides, described lower deep gouge top, both sides, described lower deep gouge middle and lower part are provided with chute,
Being additionally provided with gripper shoe in described lower deep gouge, described gripper shoe includes the first plate 52 and the second plate 53 that rotating shaft connects, described
One both sides, plate 52 top is respectively provided with a small column 54, and described small column 54 is inserted in the circular hole of respective side, described second plate 53
Two bottom sides is respectively provided with a slide block 55, and described slide block 55 is positioned at the chute of respective side.On the one hand, pick up signal when needs to connect
When receiving device, the rotating shaft in the middle of gripper shoe being pulled out, intermediate formation one space, operator is manually inserting in described space, can
To avoid signal receiver to drop.When signal receiver is placed on the ground by needs, also by the rotating shaft in the middle of gripper shoe to
Outer pull-out, signal receiver stably on ground, can conveniently see the display content on liquid crystal display screen by slant setting.Other states
Under, gripper shoe is positioned at lower deep gouge, is not take up too much space, also allows for storage.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Any amendment, equivalent and the improvement etc. made within the spirit of utility model and principle, should be included in this utility model
Protection domain within.
Claims (3)
1. a DC system earth fault inline diagnosis analytical equipment, it is characterised in that described equipment include signal generator,
Signal receiver and signals collecting pincers, described signal generator connects three chucks, is respectively used to connect straight-flow system
Positive electrode bus, negative electrode bus and ground connection, described signals collecting pincers are connected with described signal receiver, described signal generator bag
Include be sequentially connected with low frequency signal generation circuit, signal output apparatus, the first Acquisition Circuit, the first A/D convertor circuit, signal know
Other circuit, controller and display screen, described controller is additionally coupled to described low frequency signal generation circuit, described signal output electricity
Road is connected to two chucks therein, the second Acquisition Circuit that described signal receiver includes being sequentially connected with, power amplification circuit,
Filter circuit, the second A/D convertor circuit, single-chip microcomputer, liquid crystal display screen, be also associated with frequency between described filter circuit and described single-chip microcomputer
Rate identification circuit.
2. DC system earth fault inline diagnosis analytical equipment as claimed in claim 1, it is characterised in that described low frequency signal
Occurring circuit to include integrated transporting discharging T, connecting between electrode input end and the outfan of described integrated transporting discharging T has the resistance of series connection
R11 and electric capacity C2, connects the resistance R10 and electric capacity C3 having parallel connection between electrode input end and the ground of described integrated transporting discharging T, described
Be also associated with resistance R7 between negative input and the ground of integrated transporting discharging T, described low frequency signal generation circuit also include resistance R9,
Diode D1, diode D2 and adjustable resistance R8, with described adjustable electric after described resistance R9, diode D1, diode D2 parallel connection
Resistance R8 series connection, is then integrally attached between negative input and the outfan of described integrated transporting discharging T, wherein said diode
D1, diode D2 are connected in antiparallel, and the outfan of described integrated transporting discharging T exports as the signal of low frequency signal generation circuit
End.
3. DC system earth fault inline diagnosis analytical equipment as claimed in claim 2, it is characterised in that described signal receives
The back side of device caves inward and forms lower deep gouge, respectively sets a circular hole, described lower deep gouge middle and lower part in both sides, described lower deep gouge top
Both sides are provided with chute, are additionally provided with gripper shoe in described lower deep gouge, and described gripper shoe includes the first plate and that rotating shaft connects
Two plates, described first both sides, plate top are respectively provided with a small column, and described small column is inserted in the circular hole of respective side, and described second
Plate two bottom sides is respectively provided with a slide block, and described slide block is positioned at the chute of respective side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620642844.0U CN205844452U (en) | 2016-06-24 | 2016-06-24 | DC system earth fault inline diagnosis analytical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620642844.0U CN205844452U (en) | 2016-06-24 | 2016-06-24 | DC system earth fault inline diagnosis analytical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205844452U true CN205844452U (en) | 2016-12-28 |
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ID=57620234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620642844.0U Active CN205844452U (en) | 2016-06-24 | 2016-06-24 | DC system earth fault inline diagnosis analytical equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN205844452U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110808568A (en) * | 2019-11-22 | 2020-02-18 | 深圳供电局有限公司 | Method and protection device for preventing protection misoperation caused by direct-current voltage offset |
-
2016
- 2016-06-24 CN CN201620642844.0U patent/CN205844452U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110808568A (en) * | 2019-11-22 | 2020-02-18 | 深圳供电局有限公司 | Method and protection device for preventing protection misoperation caused by direct-current voltage offset |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |