CN209560021U - A kind of power electronics detection device - Google Patents
A kind of power electronics detection device Download PDFInfo
- Publication number
- CN209560021U CN209560021U CN201920118753.0U CN201920118753U CN209560021U CN 209560021 U CN209560021 U CN 209560021U CN 201920118753 U CN201920118753 U CN 201920118753U CN 209560021 U CN209560021 U CN 209560021U
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- CN
- China
- Prior art keywords
- phase power
- line
- circuit
- power transmission
- detection device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
Abstract
The utility model discloses a kind of power electronics detection devices, and in particular to the line fault detection field in power-off power distribution network.Which solve the deficiencies for not having the adaptive reclosing technology for power distribution network in existing technology.The power electronics detection device, including thyristor circuit, thyristor circuit by six thyristor groups at, every two Thyristors in series is at a bridge arm, six thyristors form three bridge arms in parallel, one end of three bridge arms is connected with the phase power supply line in three-phase power transmission circuit, and the line is equipped with step-down transformer and switch, a connecting line is drawn between two thyristors of every group of bridge arm, three connecting lines pass through step-up transformer and are sequentially connected with the three-phase power line in three-phase power transmission circuit, and a current detection means is respectively connected on three connecting lines.
Description
Technical field
The utility model relates to power off the line fault detection field in power distribution network, and in particular to a kind of power electronics detection
Device.
Background technique
Currently, the adaptive reclosing technology that domestic scholars propose, once sentence automatically before breaker coincidence
Disconnected, if a determination be made that transient fault, notice breaker is overlapped, if a determination be made that permanent fault, locking
Breaker is no longer overlapped, therefore can be to avoid being blindly overlapped.But relative to distribution line, existing research spininess pair
Transmission line of electricity.The domestic adaptive reclosing technology substantially without being directed to power distribution network.
From the point of view of the existing research for transmission line of electricity, successful experience can not be used for distribution line.
1) restore voltage class method and be not suitable for domestic power distribution network.Domestic power distribution network can permit singlephase earth fault operation
It 1-2 hours, does not trip during this period, consequently only that causing three-phase to trip in phase-to phase fault Shi Caihui, three-phase is all lost at this time
Electricity, remaining voltage very little, disappears quickly, available information amount is few, and such methods are difficult to apply in route.
2) the not applicable domestic power distribution network of arc characteristic class method.Electric arc is had after domestic distribution network failure, but due to electricity
Press grade low, the arc duration is not also permanent, obvious not as good as transmission line of electricity electric arc therefore not applicable.Further, electric arc
Itself there is nonlinear characteristic, it is unreliable according to the judging result of electric arc, it is with a low credibility.There are no practical for electric arc class method at present
Feasible technical solution is applied to distribution line.
3) the not applicable domestic power distribution network of a kind of method of shunt reactor information is utilized.There is no electricity in parallel in distribution line
Anti- device does not have reactor voltage and electric current after power failure, therefore the method based on shunt reactor information is also not suitable for.As it can be seen that right
Fault detection on power-off distribution line, is the main research of automatic reclosing technology.
Utility model content
The purpose of this utility model is in view of the above deficiencies, to propose a kind of realized using power electronic equipment for disconnected
Fault detection on electric distribution line, to provide the power electronics detection device of foundation for adaptive reclosing.
The utility model specifically adopts the following technical scheme that
A kind of power electronics detection device, including thyristor circuit, thyristor circuit is by six thyristor groups at every two
For Thyristors in series at a bridge arm, six thyristors form three bridge arms in parallel, one end of three bridge arms and three-phase power transmission electricity
A phase power supply line in road is connected, and the line is equipped with step-down transformer, draws between two thyristors of every group of bridge arm
One connecting line, three connecting lines pass through step-up transformer and are sequentially connected with the three-phase power line in three-phase power transmission circuit, and
A current detection means is respectively connected on three connecting lines.
Preferably, switch is additionally provided on the route where the step-down transformer.
Preferably, a breaker is respectively provided on three power supply lines of the three-phase power transmission circuit.
Preferably, the current detection means is installed in parallel with breaker.
Preferably, when three-phase power transmission circuit works normally, switch is disconnected, and thyristor circuit does not access three-phase power transmission electricity
Road；It after three-phase power transmission down circuitry, closes the switch, thyristor circuit is accessed into three-phase power transmission circuit.
The utility model has the following beneficial effects:
The power electronics detection device and breaker are installed in parallel on power distribution network, when power distribution network works normally, switch
It disconnects, this device does not access power distribution network；After distribution line is powered off because of failure, closes the switch, thyristor units are accessed and are powered off
Power distribution network；By the different turn-on sequence of six thyristors of control, so that occurring different current classes in test point, to detection
The size of current that arrives carries out analysis and distinguishing, can accurately detect whole distribution network line faults, for later whether
It being capable of reclosing offer foundation.
Detailed description of the invention
Fig. 1 is the converters schematic diagram detected for feature；
Fig. 2 is thyristor circuit schematic diagram.
Wherein, 1 is thyristor, and 2 be switch, and 3 be step-up transformer, and 4 be step-down transformer, and 5 be current detection means, 6
For breaker.
Specific embodiment
Specific embodiments of the utility model will be further explained in the following with reference to the drawings and specific embodiments:
As depicted in figs. 1 and 2, a kind of power electronics detection device, including thyristor circuit, thyristor circuit is by six crystalline substances
Brake tube 1 forms, and every two thyristor 1 is connected into a bridge arm, and six thyristors form three bridge arms in parallel, three bridge arms
One end is connected with the phase power supply line in three-phase power transmission circuit, and the line is equipped with step-down transformer 4 and switch 2, and decompression becomes
Depressor controls the volume and installation cost of thyristor, draws one between two thyristors of every group of bridge arm to reduce voltage
Connecting line, three connecting lines pass through step-up transformer 3 and are sequentially connected with the three-phase power line in three-phase power transmission circuit, and three
A current detection means 5 is respectively connected on connecting line, the effect of step-up transformer is to improve the voltage class of detection electric current, with
Guarantee the accuracy detected for high resistance failure.
It is respectively provided with a breaker 6 on three power supply lines of three-phase power transmission circuit, current detection means 5 is in parallel with breaker 6
Installation.
When three-phase power transmission circuit works normally, switch is disconnected, and thyristor circuit does not access three-phase power transmission circuit；Work as three-phase
It after power delivery circuit power-off, closes the switch, thyristor circuit is accessed into three-phase power transmission circuit.
The power electronics detection device and breaker are installed in parallel on power distribution network, when power distribution network works normally, switch
It disconnects, this device does not access power distribution network；After distribution line is powered off because of failure, closes the switch, thyristor units are accessed and are powered off
Power distribution network；By the different turn-on sequence of six thyristors of control, so that occurring different current classes in test point, to detection
The size of current that arrives carries out analysis and distinguishing, can accurately detect whole distribution network line faults, for later whether
It being capable of reclosing offer foundation.
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model, are also answered
Belong to the protection scope of the utility model.
Claims (5)
1. a kind of power electronics detection device, which is characterized in that including thyristor circuit, thyristor circuit is by six thyristor groups
At every two Thyristors in series forms three bridge arms in parallel, one end of three bridge arms and three at a bridge arm, six thyristors
A phase power supply line in phase power delivery circuit is connected, and the line is equipped with step-down transformer, two thyristors of every group of bridge arm it
Between draw a connecting line, three connecting lines pass through the three-phase power line in step-up transformer and three-phase power transmission circuit successively
Connection, and a current detection means is respectively connected on three connecting lines.
2. a kind of power electronics detection device as described in claim 1, which is characterized in that the line where the step-down transformer
Road is additionally provided with switch.
3. a kind of power electronics detection device as described in claim 1, which is characterized in that three of the three-phase power transmission circuit
A breaker is respectively provided on power supply line.
4. a kind of power electronics detection device as claimed in claim 3, which is characterized in that the current detection means and open circuit
Device is installed in parallel.
5. a kind of power electronics detection device as claimed in claim 2, which is characterized in that worked normally in three-phase power transmission circuit
When, switch disconnects, and thyristor circuit does not access three-phase power transmission circuit；It after three-phase power transmission down circuitry, closes the switch, by brilliant lock
Pipe circuit accesses three-phase power transmission circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920118753.0U CN209560021U (en) | 2019-01-24 | 2019-01-24 | A kind of power electronics detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920118753.0U CN209560021U (en) | 2019-01-24 | 2019-01-24 | A kind of power electronics detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209560021U true CN209560021U (en) | 2019-10-29 |
Family
ID=68307329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920118753.0U Expired - Fee Related CN209560021U (en) | 2019-01-24 | 2019-01-24 | A kind of power electronics detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209560021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014768A (en) * | 2020-09-08 | 2020-12-01 | 山东科技大学 | Method and system for detecting faults of underground power-losing circuit based on additional power supply |
-
2019
- 2019-01-24 CN CN201920118753.0U patent/CN209560021U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014768A (en) * | 2020-09-08 | 2020-12-01 | 山东科技大学 | Method and system for detecting faults of underground power-losing circuit based on additional power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191029 Termination date: 20210124 |