CN207067331U - A kind of pressure-resistant local discharge test circuit of dc circuit breaker - Google Patents
A kind of pressure-resistant local discharge test circuit of dc circuit breaker Download PDFInfo
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- CN207067331U CN207067331U CN201720999896.8U CN201720999896U CN207067331U CN 207067331 U CN207067331 U CN 207067331U CN 201720999896 U CN201720999896 U CN 201720999896U CN 207067331 U CN207067331 U CN 207067331U
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 238000005259 measurement Methods 0.000 claims abstract description 10
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Abstract
The utility model discloses a kind of pressure-resistant local discharge test circuit of dc circuit breaker, including：Dc source, balancing capacitance, measurement current transform er, partial discharge tester, wherein：Dc source provides electric energy for dc circuit breaker test product to be measured；Balancing capacitance is connected in parallel with dc circuit breaker test product to be measured；Measurement current transform er gathers dc circuit breaker test product and the differential signal of balancing capacitance, is exported after being amplified to differential signal to the partial discharge tester；Partial discharge tester receives the differential signal after amplification, measures the partial discharge quantity of dc circuit breaker test product to be measured.Circuit check dc circuit breaker module provided by the utility model is pressure-resistant and whether partial discharge quantity meets technical requirement on design,, being capable of the dc circuit breaker semiconductor subassembly form of the composition such as compatible half-bridge, parallel connection, series connection and independent device so as to the correct reliable apparatus insulated state for judging dc circuit breaker.
Description
Technical field
It the utility model is related to direct current transportation field, and in particular to a kind of pressure-resistant local discharge test circuit of dc circuit breaker.
Background technology
Dc circuit breaker be build direct current network key equipment, quick processing and isolation for DC Line Fault, direct current
The input of current conversion station and excision, have the function that important.Dc circuit breaker is pressure-resistant local discharge test as a kind of nondestructive test,
It is the important method of Insulation monitoring and diagnosis.This is due to that breaker apparatus insulating inner is commonly present some weakness, such as is being poured
Note, extrude or layer easily occurs air gap or bubble around insulating inner.Although discharge energy is very faint, the exhausted in short-term of equipment is not influenceed
Edge intensity, but insulation ag(e)ing will be caused by accumulating over a long period, and may finally cause whole insulation to puncture under normal voltage.Mesh
The preceding experiment at home and abroad not yet has related academic research, can reliably judge the apparatus insulated state of dc circuit breaker.
Utility model content
Therefore, the technical problems to be solved in the utility model is, prior art can not reliably judge dc circuit breaker
Apparatus insulated state, to solve the above problems, the utility model provides a kind of dc circuit breaker pipe testing circuit.
The pressure-resistant local discharge test circuit of a kind of dc circuit breaker provided by the utility model, including：Dc source, balance electricity
Appearance, measurement current transform er, partial discharge tester, wherein：The dc source provides electric energy for dc circuit breaker test product to be measured；Institute
Balancing capacitance is stated to be connected in parallel with the dc circuit breaker test product to be measured；The measurement current transform er gathers the direct current interruption
Device test product and the differential signal of the balancing capacitance, are exported to the partial discharge tester after being amplified to the differential signal；
The partial discharge tester receives the differential signal after amplification, measures the partial discharge quantity of the dc circuit breaker test product to be measured.
Preferably, the pressure-resistant local discharge test circuit of described dc circuit breaker, in addition to：Current limiting safeguard resistor, the current limliting
Protective resistance is connected in series between the dc source and the dc circuit breaker test product to be measured, to by the direct current interruption
The charging current of device test product is kept within a preset range.
Preferably, the scope of the resistance value of the current limiting safeguard resistor is 100 Ω~2k Ω, and power is 100W~2kW.
Preferably, the dc source includes alternating-current voltage source, bridge rectifier and the electric capacity of voltage regulation being connected in parallel.
Preferably, the scope of the capacitance of the electric capacity of voltage regulation is the μ F of 10 μ F~300.
Technical solutions of the utility model, have the following advantages that：The semiconductor and its module for forming dc circuit breaker are carried out
Experiment, every grade of module is pressure-resistant and whether partial discharge quantity meets technical requirement on design to examine, so as to it is correct it is reliable judge it is straight
The apparatus insulated state of breaker is flowed, circuit of the present utility model and method being capable of compatible half-bridge, parallel connection, series connection and independent devices
Deng the dc circuit breaker semiconductor subassembly form of the composition.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is an a kind of specific example of the pressure-resistant local discharge test circuit of dc circuit breaker in the utility model embodiment
Composition figure.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to illustrate in description of the present utility model, unless otherwise clearly defined and limited, term " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be with
It is the connection of two element internals, can is wireless connection or wired connection.For one of ordinary skill in the art
For, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Conflict can is not formed to be combined with each other.
The present embodiment provides a kind of pressure-resistant local discharge test circuit of dc circuit breaker, being capable of compatible full-bridge, half-bridge, parallel connection, string
The dc circuit breaker semiconductor subassembly form of the composition such as connection and independent device, in the present embodiment, is adopted with dc circuit breaker test product
With being illustrated exemplified by full bridge formation, but the utility model is not limited thereto.
As shown in figure 1, the pressure-resistant local discharge test circuit of the dc circuit breaker includes：Dc source 1, balancing capacitance 2, measurement electricity
Current transformer 3, partial discharge tester 4.
Wherein, dc source 1 is that dc circuit breaker test product 5 to be measured provides electric energy.
In the present embodiment, the dc source 1 includes the bridge rectifier 12 of alternating-current voltage source 11, the voltage stabilizing being connected in parallel
Electric capacity 13.After AC power (AC) 11 is by bridge rectifier 12 in the present embodiment, AC power is converted into direct current
Source.In the present embodiment, the scope of the capacitance of electric capacity of voltage regulation 13 is the μ F of 10 μ F~300.
Balancing capacitance 2 is connected in parallel with dc circuit breaker test product 5 to be measured；In test process, the balancing capacitance 2 can be with
Dc circuit breaker test product 5 to be measured forms discharge path.
Measurement current transform er 5 gathers the differential signal of dc circuit breaker test product 5 to be measured and balancing capacitance 2, and difference is believed
Output is to partial discharge tester 4 after number being amplified；Measurement current transform er 3 referred to as measures CT, and in the present embodiment, its primary side is adopted
The differential signal of sample dc circuit breaker test product 5 to be measured and balancing capacitance 2, after secondary amplifies the signal, input to partial discharge and test
Instrument 4.
Partial discharge tester 4 receives the differential signal after amplification, measures the partial discharge quantity of dc circuit breaker test product 5 to be measured.
By the relational expression between electric current and electric charge, the current difference signal of measurement is calculated as electric charge, that is, shelf depreciation
Amount.
In a preferred embodiment, dc circuit breaker is pressure-resistant, and local discharge test circuit also includes：Current limiting safeguard resistor 6, limit
Stream protective resistance 6 is connected in series between dc source 1 and dc circuit breaker test product 5 to be measured, to by dc circuit breaker to be measured
The charging current of test product 5 is kept within a preset range, so as to prevent power supply excessive to the charging current of test product, so as in time to examination
Product fill energy, prevent DC voltage from falling.Preferably, the scope of the resistance value of current limiting safeguard resistor 6 is 100 Ω~2k Ω, power
For 100W~2kW, the preset range that charging current is kept is 0~5A.
During experiment, the dc circuit breaker is pressure-resistant, and local discharge test circuit is needed the safe and reliable ground connection in test product end, is prevented
Only during local discharge test, due to overtension, cause personal electric shock.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among the protection domain that variation is created still in the utility model.
Claims (5)
- A kind of 1. pressure-resistant local discharge test circuit of dc circuit breaker, it is characterised in that including：Dc source, balancing capacitance, measurement electricity Current transformer, partial discharge tester, wherein：The dc source provides electric energy for dc circuit breaker test product to be measured；The balancing capacitance is connected in parallel with the dc circuit breaker test product to be measured；The measurement current transform er gathers the dc circuit breaker test product and the differential signal of the balancing capacitance, to the difference Sub-signal is exported to the partial discharge tester after being amplified；The partial discharge tester receives the differential signal after amplification, measures the shelf depreciation of the dc circuit breaker test product to be measured Amount.
- 2. the pressure-resistant local discharge test circuit of dc circuit breaker according to claim 1, it is characterised in that also include：Current limliting is protected Resistance is protected, the current limiting safeguard resistor is connected in series between the dc source and the dc circuit breaker test product to be measured, is used So that the charging current of the dc circuit breaker test product to be kept within a preset range.
- 3. the pressure-resistant local discharge test circuit of dc circuit breaker according to claim 2, it is characterised in that the current-limiting protection electricity The scope of the resistance value of resistance is 100 Ω~2k Ω, and power is 100W~2kW.
- 4. the pressure-resistant local discharge test circuit of dc circuit breaker according to claim 1, it is characterised in that the dc source bag Include：Alternating-current voltage source, bridge rectifier and the electric capacity of voltage regulation being connected in parallel.
- 5. the pressure-resistant local discharge test circuit of dc circuit breaker according to claim 4, it is characterised in that the electric capacity of voltage regulation The scope of capacitance is the μ F of 10 μ F~300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720999896.8U CN207067331U (en) | 2017-08-10 | 2017-08-10 | A kind of pressure-resistant local discharge test circuit of dc circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720999896.8U CN207067331U (en) | 2017-08-10 | 2017-08-10 | A kind of pressure-resistant local discharge test circuit of dc circuit breaker |
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| CN207067331U true CN207067331U (en) | 2018-03-02 |
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| CN201720999896.8U Active CN207067331U (en) | 2017-08-10 | 2017-08-10 | A kind of pressure-resistant local discharge test circuit of dc circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728031A (en) * | 2017-08-10 | 2018-02-23 | 全球能源互联网研究院有限公司 | A kind of dc circuit breaker is pressure-resistant local discharge test circuit and test method |
-
2017
- 2017-08-10 CN CN201720999896.8U patent/CN207067331U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728031A (en) * | 2017-08-10 | 2018-02-23 | 全球能源互联网研究院有限公司 | A kind of dc circuit breaker is pressure-resistant local discharge test circuit and test method |
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