CN208568993U - A kind of electric power electronic module electric current resistance test device - Google Patents
A kind of electric power electronic module electric current resistance test device Download PDFInfo
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- CN208568993U CN208568993U CN201820963520.6U CN201820963520U CN208568993U CN 208568993 U CN208568993 U CN 208568993U CN 201820963520 U CN201820963520 U CN 201820963520U CN 208568993 U CN208568993 U CN 208568993U
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Abstract
The utility model relates to a kind of electric power electronic module electric current resistance test devices, including resonant capacitance and discharge loop, resonant capacitance output connection discharge loop, string is equipped with discharge switch, resonant inductance and auxiliary valve on discharge loop, tested electric power electronic module is used to be attempted by the both ends of auxiliary valve, experimental rig further includes off-load branch, and off-load branch connects the both ends of resonant capacitance, and off-load branch road string is equipped with off-load switch and off-load element.When needing to consume residual charge in resonant capacitance, control off-load switch is opened, and using residual charge in off-load element consumption capacitor, avoids causing some potential safety problems to staff, moreover, also avoiding causing capacitor itself certain damage.In addition, experimental rig topology is simple, installation cost is low, test is highly-safe, difficulty is small, easy to accomplish.
Description
Technical field
The utility model relates to a kind of electric power electronic module electric current resistance test devices.
Background technique
Hybrid dc circuit breaker is one of the equipment of core in Multi-end flexible direct current transmission engineering, in each DC line two
The equal configuring direct current breaker in side.In direct current system, dc circuit breaker need to complete failure in several milliseconds as main protection
Electric current is cut-off, and quickly, reliably realizes the isolation and coincidence of faulty line.Dc circuit breaker is intended to ensure the peace of sane system
Full continuous service improves DC grid reliability.In addition, dc circuit breaker should have electrification switching ability, to realize converter station
It flexibly throws and moves back in DC grid.
Hybrid dc circuit breaker primary circuit generally consists of three parts, including main branch, transfer branch and energy consumption branch
Road.Main branch is mainly made of Fast mechanical switch, and main branch is used to provide under steady state operating condition directly for dc circuit breaker
Galvanic electricity logical circulation road；It is mainly in series by multi-stage power electronic-component module to shift branch, it is short for carrying direct current system in short-term
Road electric current, and capacitor is sealed in by fault loop by the change of current, establish transient state disjunction voltage；The branch that consumes energy routes multiple arrester group strings
Parallel connection is constituted, and shifts the residual amount of energy stored by branch transient state disjunction overvoltage, absorption circuit and system for inhibiting.
For the reasonability and correctness for verifying hybrid dc circuit breaker design, dc circuit breaker actual motion is accurately reflected
The performances such as electricity, heat and machinery in operating condition, it would be highly desirable to carry out the research work of dc circuit breaker equivalent test technology.Shift branch electricity
Power electronic module electric current resistance test, as one in dc circuit breaker type approval test, primarily to examining transfer branch
Electric power electronic module KA Rms ability needs to apply current wave as shown in Figure 1 to transfer branch electric power electronic module
Shape.
Application publication number is that the Chinese patent application file of CN106771947A discloses a kind of IGBT detection circuit, the inspection
Slowdown monitoring circuit includes charge circuit and discharge loop, and charge circuit includes DC charging power supply, resonant capacitance and charge switch, electric discharge
Circuit includes discharge switch, resonant inductance and auxiliary valve.DC charging power supply connects resonant capacitance, resonance electricity by charge switch
Hold string on the discharge loop formed and set resonant inductance and auxiliary valve, when being detected to tested electric power electronic module, will be tested
Electric power electronic module is attempted by auxiliary valve both ends.The detection circuit can effectively detect electric power electronic module, still,
In detection process, when auxiliary valve is connected again, portion of electrical current starts to be transferred in auxiliary valve from tested electric power electronic module, big portion
Divide energy to be stored in resonant capacitance again, just will increase the residual charge in resonant capacitance.There is the meeting compared with multi-charge in capacitor
Some potential safety problems is caused to staff, moreover, will also result in certain damage to capacitor itself.
Utility model content
The purpose of the utility model is to provide a kind of electric power electronic module electric current resistance test devices, are testing to solve
In the process, residue is compared with multi-charge in resonant capacitance, thus the problem of causing certain security risk to staff.
To achieve the above object, the utility model includes following technical scheme.
A kind of electric power electronic module electric current resistance test device, including resonant capacitance and discharge loop, the resonant capacitance
Output connects the discharge loop, and string is equipped with discharge switch, resonant inductance and auxiliary valve on the discharge loop, is tested electric power electricity
Submodule is used to be attempted by the both ends of auxiliary valve, and the experimental rig further includes off-load branch, described in the off-load branch connection
The both ends of resonant capacitance, off-load branch road string are equipped with off-load switch and off-load element.
When needing to consume residual charge in resonant capacitance, control off-load switch is opened, and is consumed using off-load element
Residual charge in capacitor avoids causing some potential safety problems to staff, moreover, also avoiding causing capacitor itself centainly
Damage.In addition, experimental rig topology is simple, installation cost is low, test is highly-safe, difficulty is small, easy to accomplish.
Further, the off-load element is electric power generation unloading resistance, and the consumption of residual charge is realized by electric power generation unloading resistance.
Further, the experimental rig further includes resonant capacitance charge circuit, the resonant capacitance charge circuit connection
The both ends of the resonant capacitance, string is equipped with charge switch on the resonant capacitance charge circuit.Pass through resonant capacitance charge circuit
It is charged online to resonant capacitance.
Further, the experimental rig further includes DC charging power supply, and the DC charging power supply is arranged described humorous
It shakes on capacitor charging circuit.
Further, the discharge switch is thyristor.
Detailed description of the invention
Fig. 1 is waveform diagram needed for transfer branch electric power electronic module short-time current resistance test；
Fig. 2 is the transfer true waveform diagram of branch electric power electronic module short-time current resistance test；
Fig. 3 is electric power electronic module electric current resistance test device circuit structure chart；
Fig. 4 is two kinds of universal architecture schematic diagrames of auxiliary valve and test product；
Fig. 5 is the first timing diagram of test method run action；
Fig. 6 is second of timing diagram of test method run action.
Specific embodiment
The utility model is described in more detail with reference to the accompanying drawing.
To realize electric power electronic module electric current resistance test, needing one kind to hold time is ms grades, and electric current is kA grades
Electric current, waveform is as shown in Fig. 2, in order to examine electric power electronic module KA Rms ability.
In the present embodiment, the test object of electric power electronic module electric current resistance test device, i.e., tested electric power electronic module
The electric power electronic module in branch is shifted for hybrid dc circuit breaker, certainly, in addition to this, test object can also be other
Electric power electronic module or discrete electric power electronic module in equipment.
The test needs to generate the electric power electronic module for maintaining the trapezoidal current wave of several ms to flow into transfer branch, benefit
The approximate DC electric current caused by the test topological structure of LC nought state order Oscillating circuit theory and auxiliary valve in parallel come etc.
Effect substitution DC current source, save the cost, securely and reliably.
As shown in figure 3, electric power electronic module electric current resistance test device includes resonant capacitance 3 and discharge loop, resonance electricity
Hold 3 output connection discharge loops, string is equipped with discharge switch, resonant inductance 7 and auxiliary valve 8 on discharge loop, is tested power electronics
Test product 9 is attempted by the both ends of auxiliary valve 8 in test by the test product 9 in module corresponding diagram 3.Auxiliary valve 8 was used in early period
LC oscillation circuit provides circuit, and the circuit of test product 9 is connected again when electric current reaches target value, turns off auxiliary valve 8.
In the present embodiment, discharge switch is specially thyristor, the isolating valve 6 in corresponding diagram 3.The experimental rig further includes unloading
Lotus branch, the off-load branch are connected to the both ends of resonant capacitance 3, and off-load branch road string is equipped with off-load switch 4 and off-load element, this
In embodiment, off-load element is electric power generation unloading resistance 5, certainly, in addition to this it is possible to be other off-load elements.During test
Residual amount of energy in resonant capacitance 3 is released by the electric power generation unloading resistance 5 of 3 both ends of resonant capacitance parallel connection, securely and reliably.
Therefore, D.C. high-current source is substituted using LC oscillating circuit, resonance electricity can be given by changing DC charging power supply 1
Hold the voltage value of 3 chargings, to change the oscillating current peak value of output.It is produced using the test topological structure of LC oscillating circuit principle
Raw oscillating current substitutes D.C. high-current source, and topology theory is simple, save the cost.By changing resonant capacitance 3 and resonance electricity
The parameter of sense 7, to change the frequency of oscillation of electric current, to meet different test objective parameter requests.By at 9 both ends of test product
Auxiliary valve 8 in parallel, auxiliary valve 8 can be made of the multiple H bridges being made of power electronic devices, provide auxiliary branch for LC oscillation power
Road solves the problems, such as to generate trapezoidal current waveform difficulty.Cut-off to obtain 9 needs of test product by control test product 9 and auxiliary valve 8
Trapezoidal electric current, control precision is high, reduces equipment investment, securely and reliably.
In order to be charged online to resonant capacitance 3, which further includes resonant capacitance charge circuit, resonant capacitance
String is equipped with DC charging power supply 1 and charge switch 2 on charge circuit, and DC charging power supply 1 connects resonance electricity by charge switch 2
Hold 3.DC charging power supply 1 is used to charge to resonant capacitance 3, and in charging process, combined floodgate charge switch 2, charging is finished, and disconnection is filled
Electric switch 2.As other embodiments, DC charging power supply 1 can not also be a part of experimental rig, but the later period adds
The equipment added.Moreover, the resonant capacitance charge circuit may not be a part of experimental rig, external charging equipment is utilized
It charges for resonant capacitance 3, after resonant capacitance 3 is charged, disconnects charging equipment.
Fig. 4 gives two kinds of general topological structures of test product 9 and auxiliary valve 8, is mutual by a variety of power electronic elements
It is series-parallel to constitute.
Therefore, it shakes to the current waveform that test product 9 applies as shown in Figure 1, constituting LC using resonant capacitance 3 and resonant inductance 7
Circuit is swung, generates kA grades of electric current, the current waveform obtained is as shown in Fig. 2, simultaneously turn on auxiliary valve 8 at the T1 moment, in T2
Moment electric current reaches setting value, and test product 9 is connected, and by Δ t1 second (us grade) shutdown auxiliary valves 8 later, electric current was from 8 institute of auxiliary valve
9 place branch of test product is flowed into branch.It can choose two different technical solutions at the T3 moment: the first technical solution: T3
Auxiliary valve 8 is connected in moment, and portion of electrical current starts to be transferred to auxiliary valve 8 from test product 9, after certain time (us grades), shutdown examination
Product 9；Second of technical solution: 9 turn-off current of test product is directly utilized at the T3 moment, requirement of this technical solution to test product 9 is more
It is harsh, also closer to actual condition.In addition, most of energy is stored in resonant capacitance 3 again after the T3 moment, then, control is unloaded
Lotus switch 4 is connected, and the residual amount of energy in resonant capacitance 3 is released by the electric power generation unloading resistance 5 of 3 both ends of resonant capacitance parallel connection, safety
Reliably.
Two kinds of time series stereodata processes of experimental rig are provided below in conjunction with Fig. 5 and Fig. 6.
Fig. 5 gives the first time series stereodata process.
1) preparation stage
Off-load switch 4 is in off-state, and the triggering of 6 gate pole of isolating valve is in blocking.
2) charging stage
The t0 moment is closed charge switch 2, and DC charging power supply 1 starts to charge to resonant capacitance 3, by Δ t1 (t1-t0)
Afterwards, 3 voltage of resonant capacitance disconnects charge switch 2 to set target value, t1 moment.
3) resonance and electric current transition phase
T2 moment, triggering isolating valve 6 and triggering auxiliary valve 8 unlock, and resonance, electric current occur for resonant capacitance 3 and resonant inductance 7
Flow into auxiliary valve 8.
Electric current reaches target value in t3 moment auxiliary valve 8, triggers hybrid dc circuit breaker transfer branch power electronics mould
Block test product 9 reaches the t4 moment after Δ t2 (t4-t3), turns off auxiliary valve 8, and oscillation circuit electric current is transferred to examination by auxiliary valve 8
Product 9.
Throughput time reaches setting value in t5 moment test product 9, opens auxiliary valve 8, when reaching t6 after Δ t3 (t6-t5)
It carves, turns off hybrid dc circuit breaker transfer branch electric power electronic module test product 9, electric current is fully transferred in auxiliary valve 8 at this time.
Electric current is close to zero in t7 moment auxiliary valve 8, disconnects auxiliary valve 8.
Fig. 6 gives the time series stereodata of second of technical solution, and the difference with the first technical solution is finally
Stage, t5 moment directly turn off test current by test product 9 itself.
Specific embodiment is presented above, but the utility model is not limited to described embodiment.This is practical
Novel basic ideas are above-mentioned basic scheme, for those of ordinary skill in the art, introduction according to the present utility model,
The model, formula, parameter for designing various modifications do not need to spend creative work.The principles of the present invention are not being departed from
The protection scope of the utility model is still fallen with the change, modification, replacement and modification carried out in the case where spirit to embodiment
It is interior.
Claims (5)
1. a kind of electric power electronic module electric current resistance test device, including resonant capacitance and discharge loop, the resonant capacitance are defeated
The discharge loop is connected out, and string is equipped with discharge switch, resonant inductance and auxiliary valve on the discharge loop, is tested power electronics
Module is used to be attempted by the both ends of auxiliary valve, which is characterized in that the experimental rig further includes off-load branch, the off-load branch
The both ends of the resonant capacitance are connected, off-load branch road string is equipped with off-load switch and off-load element.
2. electric power electronic module electric current resistance test device according to claim 1, which is characterized in that the off-load element
For electric power generation unloading resistance.
3. electric power electronic module electric current resistance test device according to claim 1 or 2, which is characterized in that the test
Device further includes resonant capacitance charge circuit, and the resonant capacitance charge circuit connects the both ends of the resonant capacitance, described humorous
String is equipped with charge switch on vibration capacitor charging circuit.
4. electric power electronic module electric current resistance test device according to claim 3, which is characterized in that the experimental rig
It further include DC charging power supply, the DC charging power supply is arranged on the resonant capacitance charge circuit.
5. electric power electronic module electric current resistance test device according to claim 1 or 2, which is characterized in that the electric discharge
Switch is thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820963520.6U CN208568993U (en) | 2018-06-21 | 2018-06-21 | A kind of electric power electronic module electric current resistance test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820963520.6U CN208568993U (en) | 2018-06-21 | 2018-06-21 | A kind of electric power electronic module electric current resistance test device |
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| CN201820963520.6U Active CN208568993U (en) | 2018-06-21 | 2018-06-21 | A kind of electric power electronic module electric current resistance test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957303A (en) * | 2017-05-26 | 2018-12-07 | 许继电气股份有限公司 | A kind of high voltage DC breaker electric current resistance test circuit and method |
| CN110571816A (en) * | 2019-07-31 | 2019-12-13 | 全球能源互联网研究院有限公司 | modularized controllable unloading circuit and control method |
-
2018
- 2018-06-21 CN CN201820963520.6U patent/CN208568993U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957303A (en) * | 2017-05-26 | 2018-12-07 | 许继电气股份有限公司 | A kind of high voltage DC breaker electric current resistance test circuit and method |
| CN108957303B (en) * | 2017-05-26 | 2020-08-25 | 许继电气股份有限公司 | High-voltage direct-current breaker current tolerance test loop and method |
| CN110571816A (en) * | 2019-07-31 | 2019-12-13 | 全球能源互联网研究院有限公司 | modularized controllable unloading circuit and control method |
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