CN206975126U - A kind of high-voltage large-capacity power capacitor short-circuit test device - Google Patents
A kind of high-voltage large-capacity power capacitor short-circuit test device Download PDFInfo
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- CN206975126U CN206975126U CN201720482590.5U CN201720482590U CN206975126U CN 206975126 U CN206975126 U CN 206975126U CN 201720482590 U CN201720482590 U CN 201720482590U CN 206975126 U CN206975126 U CN 206975126U
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Abstract
The application provides a kind of high-voltage large-capacity power capacitor short-circuit test device; include charging circuit; three parts of discharge circuit and silicon controlled rectifier protecting circuit; in the both ends parallel connection silicon controlled rectifier protecting circuit of tested capacitor; the switch of the high-power silicon controlled rectifier is controlled by A.C. contactor; there is contactless triggering using controllable silicon, respond fast, no-spark, efficiency high; equipment failure rate and potential safety hazard can be greatly reduced; prevent from, because fault or capacitor are not fully discharged, causing the danger of human electric shock.
Description
Technical field：
Component detection technique field is the utility model is related to, it is short more particularly to a kind of high-voltage large-capacity power capacitor
Road test experiment device.
Background technology：
Power capacitor is commonly used for the capacitor of power system and electrical equipment.Impulsive discharge experiment is GB/T17702-
One of type approval test specified in 2013, it is to verify that can power capacitor meet that the whole of technical specification require
Capable experiment.Only could formally it be put into production by type approval test, the product.
The power capacitor of domestic production at present, capacity is big, and pressure voltage is high, is doing near short circuit impulsive discharge experiment process
In, caused dash current moment is likely to be breached more than ten kilo-ampere even more highs, is cut according to common switch or A.C. contactor
Change, heating of contact can be caused because immediate current is too high, struck sparks phenomena such as even on fire, fault rate is high and easily produces safe hidden
Suffer from.
Utility model content：
The application provides a kind of high-voltage large-capacity power capacitor short-circuit test device, includes charging circuit, discharge circuit
With three parts of silicon controlled rectifier protecting circuit, wherein：Charging circuit is by DC dc sources, charging resistor R1, discharge resistance R2, power supply
Discharge switch J1 and charge switch J2 compositions, the positive poles of the DC dc sources, which is connected in series after charging resistor R1 to be connected in series, to be filled
Electric switch J2, the negative poles of the DC dc sources are connected in series the corona discharge switch after being connected in series the discharge resistance R2
Charging resistor R1 and charge switch J2 centre are connected to after J1；Discharge circuit by A.C. contactor J3, sample discharge resistance R3,
A.C. contactor J4 and controllable silicon SCR composition, the A.C. contactor J3 and the sample discharge resistance R3 are connected in series latter
End is connected to the charge switch J2, and the other end is connected among the negative pole and the discharge resistance R2 of the DC dc sources,
The A.C. contactor J4 and the positive pole of controllable silicon SCR are connected in series, and described J4 one end is connected between the J2 and J3, institute
The negative pole for stating controllable silicon SCR is connected among the negative pole and the discharge resistance R2 of the DC dc sources；The controllable silicon is protected
Protection circuit is connected in parallel in the both ends of the controllable silicon SCR, and the silicon controlled rectifier protecting circuit is mainly by electric capacity C1, resistance R5, pressure
Quick resistance VDR and four high-voltage diode compositions, it is in parallel with piezo-resistance VDR after electric capacity C1 and resistance the R5 series connection, simultaneously
Four high-voltage diodes are parallel to the piezo-resistance VDR both ends by way of parallel connection bridges, and are tested capacitor simultaneously
It is associated in the overall both ends that the A.C. contactor J3 and sample discharge resistance R3 series connection is formed；PLC or other patrol
Control pole of the unit to the controllable silicon is collected, A.C. contactor J4 and charge switch J2 apply control signal.
When the tested capacitor is when in the state of fully charged, the A.C. contactor J4 is closed first sample is entered
Row short circuit dischange, the control pole of one-way SCR is then applied to by control signal, realizes and the short circuit for being tested capacitor is put
Electricity, the control signal are applied by PLC or other logic units；At the end of the short circuit dischange, by the ac contactor
The control pole signal of device J4 and one-way SCR all disconnects, and realizes that controllable silicon turns off；A.C. contactor J3 and the sample electric discharge
Resistance R3 discharges the tested capacitor in off-test, realizes that the high-voltage large-capacity power capacitor is short
Road test is tested.
Wherein, four high-voltage diodes are specially by way of parallel connection bridges：The high-voltage diode D1 and D2
Parallel connection, the high-voltage diode D3 and D4 are in parallel, and the positive pole of the high-voltage diode D1 and D2 is connected to the high pressure two
Pole pipe D3 and D4 negative pole, the negative pole of the high-voltage diode D1 and D2 are connected to the A.C. contactor J4 and controllable silicon
Between SCR, the positive pole of the high-voltage diode D3 and D4 is connected to the negative pole of the DC dc sources and the electric discharge electricity
Hinder among R2.
In the utility model by the way of A.C. contactor+high-power silicon controlled rectifier, controllable silicon has contactless triggering, sound
Should fast, no-spark, efficiency high the features such as, equipment failure rate and potential safety hazard can be greatly reduced.Can prevent because of fault or
Person's capacitor is not fully discharged, causes the danger of human electric shock.
Brief description of the drawings：
Fig. 1 is the high-voltage large-capacity power capacitor short-circuit test installation drawing；
Embodiment：
（One）Live part：
Live part switchs J1 and charge switch J2 by DC dc sources, charging resistor R1, discharge resistance R2, corona discharge
Composition.
DC is DC power supplier, can use switch DC voltage-stabilized power supply, linear direct current regulated power supply or pass through tune
The forms such as rectifying and wave-filtering are pressed to realize.
R1 is charging resistor（Current-limiting resistance）, prevent charging current from causing out-put supply to damage because of load excessive.
R2 is corona discharge resistance, and any type of dc source, filter capacitor can all be connect by exporting, therefore in off-test
When discharged by discharge switch J1, prevent from getting an electric shock.
J2 is sample charge and discharge switch, when on-test, if adjusted good power supply output, when closing J2, you can pass through
Circuit charges to subject capacitor.
（Two）Discharge portion：
Discharge portion is the major part of the design, and when being tested, condenser voltage is higher, will according to standard when capacity is larger
Near short circuit is asked to discharge, it is contemplated that close to 0, its instantaneous caused heat can cause ac contactor with moment for discharge loop impedance
The electric shock of device is burnt even on fire, therefore can not simply use A.C. contactor or other switching devices enter in design
Row short circuit.
The design carries out discharge process using high-power one-way SCR, because of its fast response time, contactless conducting triggering,
No-spark in switching process, turn on efficiency high the features such as, be widely used in power electronic equipment.
Because one-way SCR turn-on condition one is must to add forward voltage between controllable silicon anode and negative electrode, second, control pole
Also forward voltage is added.Two above condition must be provided simultaneously with, and controllable silicon just can be in the conduction state.In addition, controllable silicon one
After denier conducting, even if reducing control pole tension or removing control pole tension, controllable silicon still turns on.Controllable silicon turn-off criterion:Drop
It is low or remove and be added in controllable silicon anode to the forward voltage between negative electrode, anode current is less than below extinction current.Cause
This contactor J4 that need to be increased exchanges in the design in discharge loop is used to disconnect the forward voltage between controllable silicon anode and negative electrode.
When being tested capacitor when in the state of fully charged, when need to carry out short circuit dischange to sample, closure is needed to exchange first
Contactor J4, the control pole of one-way SCR is then applied to by control signal control, you can realize to being tested capacitor
Short circuit dischange.Control signal control can be applied by PLC or other logic units.
, need to be all disconnected by the control pole signal control of A.C. contactor J4 and one-way SCR at the end of short circuit dischange
Open, controllable silicon shut-off just can be achieved.A.C. contactor J3 and sample discharge resistance R3 enter in off-test to subject capacitor
Row electric discharge, prevents from, because fault or capacitor are not fully discharged, causing the danger of human electric shock.
（Three）Silicon controlled rectifier protecting circuit：
Electric capacity C1 and resistance R5 composition resistance capaciting absorpting circuits, prevent because the voltage rate of rise is too fast, puncture controllable silicon.
Piezo-resistance VDR is overvoltage protective module, is prevented because of excessive pressure damages controllable silicon.
D1 ~ D4 is high-voltage diode, prevents from, because backward voltage punctures controllable silicon, by way of multiple series and parallels, making
Circuit can be in the applications of more high withstand voltage.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to the utility model patent scope.It should be pointed out that for the common of this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (2)
1. a kind of high-voltage large-capacity power capacitor short-circuit test device, comprising charging circuit, discharge circuit and silicon controlled rectifier protecting
Three parts of circuit, wherein：Charging circuit by DC dc sources, charging resistor R1, discharge resistance R2, corona discharge switch J1 and
Charge switch J2 is formed, and the positive poles of the DC dc sources is connected in series charge switch J2, institute after being connected in series charging resistor R1
State DC dc sources negative pole be connected in series after the discharge resistance R2 be connected in series the corona discharge switch J1 after be connected to
Charging resistor R1 and charge switch J2 centre；Discharge circuit is by A.C. contactor J3, sample discharge resistance R3, A.C. contactor
J4 and controllable silicon SCR composition, the A.C. contactor J3 and the sample discharge resistance R3 are connected in series rear one end and are connected to institute
Charge switch J2 is stated, the other end is connected among the negative pole and the discharge resistance R2 of the DC dc sources, and the exchange connects
Tentaculum J4 and the positive pole of controllable silicon SCR are connected in series, and described A.C. contactor J4 one end be connected to the charge switch J2 and
Between A.C. contactor J3, the negative pole of the controllable silicon SCR is connected to the negative pole of the DC dc sources and the discharge resistance
Among R2；The silicon controlled rectifier protecting circuit in parallel is connected to the both ends of the controllable silicon SCR, and the silicon controlled rectifier protecting circuit is main
By electric capacity C1, resistance R5, piezo-resistance VDR and four high-voltage diodes compositions, after electric capacity C1 and resistance the R5 series connection with pressure
Quick resistance VDR is in parallel, while four high-voltage diodes are parallel to the piezo-resistance VDR two by way of parallel connection bridges
End, tested capacitor are connected in parallel on overall two that the A.C. contactor J3 and sample discharge resistance R3 series connection is formed
End；For PLC unit to the control pole of the controllable silicon, A.C. contactor J4 and charge switch J2 apply control signal.
2. according to the device described in claim 1, wherein, four high-voltage diodes are specific by way of parallel connection bridges
For：The high-voltage diode D1 and D2 are in parallel, and the high-voltage diode D3 and D4 are in parallel, and the high-voltage diode D1 and D2 is just
Pole is connected to the negative pole of the high-voltage diode D3 and D4, and the negative pole of the high-voltage diode D1 and D2 is connected to institute
State between A.C. contactor J4 and controllable silicon SCR, the positive pole of the high-voltage diode D3 and D4 is connected to the DC direct currents
Among the negative pole of power supply and the discharge resistance R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720482590.5U CN206975126U (en) | 2017-05-04 | 2017-05-04 | A kind of high-voltage large-capacity power capacitor short-circuit test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720482590.5U CN206975126U (en) | 2017-05-04 | 2017-05-04 | A kind of high-voltage large-capacity power capacitor short-circuit test device |
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| Publication Number | Publication Date |
|---|---|
| CN206975126U true CN206975126U (en) | 2018-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720482590.5U Active CN206975126U (en) | 2017-05-04 | 2017-05-04 | A kind of high-voltage large-capacity power capacitor short-circuit test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187226A (en) * | 2019-06-28 | 2019-08-30 | 无锡宏广电容器有限公司 | Polypropylene film capacitor short circuit dischange device |
| CN112630575A (en) * | 2020-12-25 | 2021-04-09 | 浙江大学 | High-capacity power semiconductor module aluminum binding wire electric explosion test system and method |
-
2017
- 2017-05-04 CN CN201720482590.5U patent/CN206975126U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187226A (en) * | 2019-06-28 | 2019-08-30 | 无锡宏广电容器有限公司 | Polypropylene film capacitor short circuit dischange device |
| CN112630575A (en) * | 2020-12-25 | 2021-04-09 | 浙江大学 | High-capacity power semiconductor module aluminum binding wire electric explosion test system and method |
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