CN207851188U - A kind of experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current - Google Patents
A kind of experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current Download PDFInfo
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- CN207851188U CN207851188U CN201820354758.9U CN201820354758U CN207851188U CN 207851188 U CN207851188 U CN 207851188U CN 201820354758 U CN201820354758 U CN 201820354758U CN 207851188 U CN207851188 U CN 207851188U
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Abstract
The utility model discloses a kind of experimental rigs of MMC HVDC converter valves section half-wave sequential short circuit electric current, including accompany die trial block and subject module；It includes the multiple three-phase transformers for connecting AC network wherein to accompany die trial block, and three-phase transformer is two outputs of an input, and the output end of three-phase transformer is connect by thyristor with examination valve section is accompanied respectively；It accompanies and is also associated with first switch and current detecting unit between die trial block and subject module；Tested module includes regulated power supply, regulated power supply series-connected switches group, the both ends connection subject valve section of regulated power supply.It can verify that whether power device and interlock circuit are suitable under short-circuit conditions, the maximum value of its voltage, electric current, du/dt and di/dt are whether in safety margin in short-circuit test.
Description
Technical field
The utility model belongs to flexible DC transmission technology field；More particularly to a kind of MMC-HVDC converter valves section half-wave
The experimental rig of sequential short circuit electric current.
Background technology
The short circuit current test objective is to check whether power device and interlock circuit are suitable under short-circuit conditions, is tried in short circuit
Whether voltage, electric current, du/dt and di/dt maximum values in testing meet design requirement, if in safety margin.
Test requirements document subjects startup separator current occurrences after reaching highest stable state junction temperature and entering thermal balance,
It time should be the expected maximum value reached in actual motion to ask amplitude, duration and the wave of fault current, electric current not additional testing
Safety coefficient.After power module, which bears short circuit current, is more than protection setting value, power module IGBT will be latched, at this time short circuit electricity
Stream flows mainly through IGBT parallel diodes, that is to say, that the main examination power module IGBT parallel diodes of short circuit current experiment
Tolerance.If power module fault condition can not be reappeared completely during the test, allows to use equivalent test method, answer
There is provided equivalent short circuit current test method explanation, it was demonstrated that the validity of test method.Test current answers simulated high-pressure valve group valve electric
The short circuit current simulation waveform of anti-device valve side singlephase earth fault examines valve.
Utility model content
The utility model provides a kind of experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current；It can
Examine power device and interlock circuit under short-circuit conditions whether suitable, its voltage, electric current, du/dt and di/dt in short-circuit test
Maximum value whether in safety margin.
The technical solution of the utility model is：A kind of experiment dress of MMC-HVDC converter valves section half-wave sequential short circuit electric current
It sets, including accompanies die trial block and subject module；It includes the multiple three-phase transformers for connecting AC network, three phase transformations wherein to accompany die trial block
Depressor is two outputs of an input, and the output end of three-phase transformer is connect by thyristor with examination valve section is accompanied respectively；Accompany examination
It is also associated with first switch and current detecting unit between module and subject module；Tested module includes regulated power supply, adjustable electric
Source-series connecting valve group, the both ends connection subject valve section of regulated power supply.
Further, the utility model is also characterized by：
Wherein regulated power supply is adjustable ac source, specially AC power series voltage regulator and a thyristor.
Wherein regulated power supply is adjustable DC power supply, the specially oscillating circuit of DC power supply and series connection with it.
Wherein regulated power supply is adjustable ac source and adjustable DC power supply in parallel；Wherein adjustable ac source is exchange
Power supply series voltage regulator and a thyristor；Adjustable DC power supply is that DC power supply connects the 4th switching group, is then connected one
Oscillating circuit.
Wherein fuse is also associated between the output end and thyristor of three-phase transformer.
Wherein it is tested the subject valve section of series connection 2 or 2 or more between regulated power supply in module；It accompanies in die trial block accordingly
Series connection respective numbers accompany examination valve section.
Wherein switching group includes second switch and third switch.
Compared with prior art, the utility model has the beneficial effects that：The experimental rig, which disclosure satisfy that, changes MMC-HVDC
The experiment of valve valve section half-wave sequential short circuit electric current is flowed, and by accompanying die trial block and being tested the comparison of module, and by adjusting
The voltage of regulated power supply makes short circuit current adjustment meet the requirements.
Further, setting regulated power supply is adjustable ac source or adjustable DC power supply；Adjustable ac source passes through
AC power realizes the adjustable of alternating voltage with pressure regulator；DC power supply itself has voltage adjustability.
Further, fuse further protection three-phase transformer and accompany examination valve section safety.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is that the utility model carries out short circuit current test waveform figure.
Specific implementation mode
The technical solution of the utility model is further illustrated in the following with reference to the drawings and specific embodiments.
The utility model provides a kind of experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current, such as schemes
Shown in 1, including accompany die trial block and subject module；It includes multiple three-phases being arranged in parallel of incoming transport power grid wherein to accompany die trial block
Transformer, specific AC network are 380V, and the output end of AC network is also associated with breaker, start-up resistor and contactor,
And AC network is also connected with transformer, then connects the three-phase transformer of multiple parallel connections；There are one input terminals for three-phase transformer tool
Two output ends, and each output end is connect by fuse and thyristor with a module of examination valve section is accompanied, and accompany examination valve
Section is connected to the both ends of multiple three-phase transformers；It accompanies and is also associated with first switch K1 and an electricity between die trial block and subject module
Flow detection unit, current detecting unit；It includes regulated power supply, regulated power supply tandem tap group, and regulated power supply two to be tested module
End connection subject valve section.
Preferably, three-phase transformer is three, and for three three-phase transformer tools there are six output end, six output ends are corresponding
Six modules of examination valve section are accompanied in connection；Six block coupled in series of corresponding subject valve section are arranged at the both ends of regulated power supply.
Preferably, regulated power supply is adjustable ac source, specially AC power series voltage regulator and thyristor, is then gone here and there
Join switching group.
Preferably, regulated power supply is adjustable DC power supply, and specially DC power supply connects the 4th switch K4, then connects one
A oscillating circuit, then connect with switching group.
Preferably, regulated power supply is that above-mentioned adjustable ac source is arranged with adjustable DC power sources in parallel.
Preferably, switching group is two, specifically includes concatenated second switch K2 and third switch K3.
The experiment process of the experimental rig of the utility model is：
When using adjustable ac source：Harmonic is carried out to subject valve section by regulated power supply, makes the voltage tune of regulated power supply
It is whole switching group to be then connected, shortwave electric current is applied to subject valve section to minimum,.It is tested the current peak in valve section by test,
And the value required with technology is compared, and is adjusted the voltage of regulated power supply, is repeated the above process, until shortwave electric current meets examination
Test requirement.
When using adjustable DC power supply：The duration of shortwave current requirements calculates the LC values in oscillating circuitThe LC parameters of oscillating circuit are adjusted according to t values, and are finished to capacitor charging, cut off DC power supply, then
It controls switching group and applies electric current to subject valve section, repeat the above process, until shortwave electric current Pass Test requirement.
When simultaneously using adjustable DC power supply and adjustable ac source：Direct current power source voltage is first debugged, and gives oscillation electricity
The capacitor on road is full of, and simultaneously switches off the 4th switch K4.The original state of experimental rig is second switch K2 disjunctions, third switch
K3 is closed.After subject valve section locking, thyristor pulse is issued, second switch K2 is closed at, shortwave electric current is imported, is advising
Third switch K3 is disconnected after the fixed time, completes experiment.Then disjunction second switch K2 and adjustable ac source, and to electricity
Condenser discharge.
Tested using the device of the utility model, obtained current waveform figure as shown in Fig. 2, current waveform is normal,
There is no larger fluctuation.
Claims (7)
1. a kind of experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current, which is characterized in that including accompanying die trial
Block and subject module；It includes the multiple three-phase transformers for connecting AC network wherein to accompany die trial block, and three-phase transformer is one defeated
Enter two outputs, and the output end of three-phase transformer is connect by thyristor with examination valve section is accompanied respectively；Accompany die trial block and by die trial
First switch and current detecting unit are also associated between block；Tested module includes regulated power supply, and regulated power supply is connected in series with out
Pass group, the both ends connection subject valve section of regulated power supply.
2. the experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current according to claim 1, feature
It is, the regulated power supply is adjustable ac source, specially AC power series voltage regulator and a thyristor.
3. the experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current according to claim 1, feature
It is, the regulated power supply is adjustable DC power supply, the specially oscillating circuit of DC power supply and series connection with it.
4. the experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current according to claim 1, feature
It is, the regulated power supply is the adjustable ac source and adjustable DC power supply of parallel connection；Wherein adjustable ac source is alternating current
Source-series pressure regulator and a thyristor；Adjustable DC power supply is the 4th switch of DC power supply connection, a concussion of then connecting
Circuit.
5. the experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current according to claim 1, feature
It is, fuse is also associated between the output end and thyristor of the three-phase transformer.
6. the experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current according to claim 1, feature
It is, the subject valve section for being tested series connection 2 or 2 or more between regulated power supply in module；Corresponding accompany is gone here and there in die trial block
Connection respective numbers accompany examination valve section.
7. the experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current according to claim 1, feature
It is, the switching group includes second switch and third switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820354758.9U CN207851188U (en) | 2018-03-15 | 2018-03-15 | A kind of experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820354758.9U CN207851188U (en) | 2018-03-15 | 2018-03-15 | A kind of experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current |
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| Publication Number | Publication Date |
|---|---|
| CN207851188U true CN207851188U (en) | 2018-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820354758.9U Active CN207851188U (en) | 2018-03-15 | 2018-03-15 | A kind of experimental rig of MMC-HVDC converter valves section half-wave sequential short circuit electric current |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161345A (en) * | 2019-06-20 | 2019-08-23 | 贵州电网有限责任公司 | A kind of multi-functional MMC low-voltage low current model prototype and analogy method |
| CN110456201A (en) * | 2019-08-21 | 2019-11-15 | 南方电网科学研究院有限责任公司 | The power cycle acceleration test apparatus and its control method of MMC submodule |
| CN110940884A (en) * | 2019-12-18 | 2020-03-31 | 西安西电电力***有限公司 | Converter valve short-circuit current automatic test method and device and control protection equipment |
| CN113655324A (en) * | 2021-09-03 | 2021-11-16 | 广东电网有限责任公司广州供电局 | Converter valve operation test topology platform |
-
2018
- 2018-03-15 CN CN201820354758.9U patent/CN207851188U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161345A (en) * | 2019-06-20 | 2019-08-23 | 贵州电网有限责任公司 | A kind of multi-functional MMC low-voltage low current model prototype and analogy method |
| CN110161345B (en) * | 2019-06-20 | 2024-05-07 | 贵州电网有限责任公司 | Multifunctional MMC low-voltage small-current simulation prototype and simulation method |
| CN110456201A (en) * | 2019-08-21 | 2019-11-15 | 南方电网科学研究院有限责任公司 | The power cycle acceleration test apparatus and its control method of MMC submodule |
| CN110456201B (en) * | 2019-08-21 | 2022-02-25 | 南方电网科学研究院有限责任公司 | Power cycle acceleration test device of MMC sub-module and control method thereof |
| CN110940884A (en) * | 2019-12-18 | 2020-03-31 | 西安西电电力***有限公司 | Converter valve short-circuit current automatic test method and device and control protection equipment |
| CN110940884B (en) * | 2019-12-18 | 2022-02-15 | 西安西电电力***有限公司 | Converter valve short-circuit current automatic test method and device and control protection equipment |
| CN113655324A (en) * | 2021-09-03 | 2021-11-16 | 广东电网有限责任公司广州供电局 | Converter valve operation test topology platform |
| CN113655324B (en) * | 2021-09-03 | 2023-05-30 | 广东电网有限责任公司广州供电局 | Converter valve operation test topology platform |
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