CN104991131A - Flexible direct-current power-transmission converter-valve half-bridge structure power module test device - Google Patents

Flexible direct-current power-transmission converter-valve half-bridge structure power module test device Download PDF

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Publication number
CN104991131A
CN104991131A CN201510323891.9A CN201510323891A CN104991131A CN 104991131 A CN104991131 A CN 104991131A CN 201510323891 A CN201510323891 A CN 201510323891A CN 104991131 A CN104991131 A CN 104991131A
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China
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bridge
power
valve
tested
test
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Inventor
李子欣
许彬
王平
李耀华
徐飞
高范强
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Institute of Electrical Engineering of CAS
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Institute of Electrical Engineering of CAS
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Priority to CN201510323891.9A priority Critical patent/CN104991131A/en
Publication of CN104991131A publication Critical patent/CN104991131A/en
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Abstract

A flexible direct-current power-transmission converter-valve half-bridge structure power module test device comprises a primary loop and a secondary loop. The primary loop provides electrical connection for a converter-valve half-bridge structure power module test. The secondary loop is used for controlling the primary loop. The secondary loop and the primary loop are connected through a control monitoring plate card in a half-bridge structure power module in a flexible direct-current power-transmission converter valve. The primary loop comprises a company test side, a tested side and a load inductor. The company test side and the tested side are connected in series through the load inductor so as to form a closed loop. The company test side comprises one company test valve segment. The tested side comprises a plurality of tested valve segments. A structure of the company test valve segment and structures of the tested valve segments are the same and are formed through connecting half-bridge structure power modules with same quantities in series. The test device controls a module investment of the company test valve segment through a PWM modulation method. An initial value of a duty ratio of a control signal is 0 and then the value is increased slowly from a charging moment so as to limit an impact current during a charging process.

Description

A kind of flexible direct current transmission converter valve half-bridge structure power module test device
Technical field
The present invention relates to a kind of proving installation of flexible direct current transmission converter valve.
Background technology
Flexible direct current transmission converter valve is the nucleus equipment of flexible DC power transmission, and half-bridge structure power model is the minimum unit of converter valve, must ensure its reliability service by various testing experiment.Therefore half-bridge structure power module test device reasonable in design is needed, the various running statuses that can occur when simulating actual motion as much as possible, to detect the design whether engineering demands of half-bridge structure power model.
At present, proving installation about flexible direct current transmission converter valve half-bridge structure power model is domestic some relevant patents, as CN201310652351, CN201310407363, CN201210533984 etc., the main deficiency of the half-bridge structure power module test device that these patents propose is: one time testing experiment can only test one or minority half-bridge structure power model, link is tested consuming time huge for the Practical Project of half-bridge structure power model huge number, half-bridge structure power model is frequently needed to tear open, dress operation, cannot test by mass, the proving installation circuit structure that above-mentioned patent is mentioned is simple, half-bridge structure power model quantity is few, therefore can only carry out the testing experiment of a few species, same circuit cannot be utilized to carry out the testing experiment of multiple different operating state to half-bridge structure power model.The proving installation mentioned of above-mentioned patent mainly utilizes direct supply to be equipped with charging current limiter resistance in charging link to charge one by one successively to half-bridge structure power model, and the duration of charging is longer and charging resistor consumes active power is more.In sum, the proving installation of existing converter valve half-bridge structure power model need to improve in testing efficiency, test circuit function and test energy consumption etc.
Summary of the invention
The present invention is intended to the shortcoming overcoming above-mentioned existing proving installation, proposes a kind of flexible direct current transmission converter valve half-bridge structure power module test device.The multiple tested valve section of the disposable input of the present invention, coordinates with corresponding control strategy, greatly can improve testing efficiency.The present invention utilizes same test circuit, can carry out the charging measurement of half-bridge structure power model, steady-state operation test and short-circuit test, enrich test function.
The present invention is by the following technical solutions:
The present invention includes primary circuit and secondary circuit two parts.Primary circuit provides necessary physical connection for test, for converter valve half-bridge structure power module test provides necessary electrical connection, is the carrier of testing experiment.Secondary circuit effect has two: one display test parameters, two control and protection primary circuits.
The test parameter that the present invention utilizes the control of each inside modules to monitor board collection directly uploads to terminal PC display by secondary circuit, as: voltage, temperature, module status, module failure etc.Internal control monitoring board cartoon is crossed Communication Card and is adopted optical fiber to transmit test parameter to terminal PC.Therefore test equipment of the present invention can simplified measurement device, only needs the size of electric current in a current sensor measurement primary circuit.
Described secondary circuit and primary circuit are linked by described control monitoring board and connect.
The primary circuit of proving installation of the present invention mainly comprises accompanies examination side, tested side and load inductance.Accompany examination side and tested side to be connected by load inductance and form closed-loop path.Primary circuit provides necessary electrical connection for converter valve half-bridge structure power module test, is the carrier of testing experiment.
Described examination side of accompanying is tried valve section formed by being accompanied of being connected with charging system, for the energy ezpenditure in supplementary testing experiment, and assists tested side to complete testing experiment.
Described tested side is in series by multiple tested valve section, by load inductance L with accompany examination valve section and be connected, isolating switch K and short circuited inductance Ls is in parallel with tested side after connecting, for short-circuit test.
Described examination valve section of accompanying is composed in series by multiple half-bridge structure power model.
Described half-bridge structure power model is made up of an electric capacity, upper and lower brachium pontis, by-pass switch and thyristor, and described upper and lower brachium pontis is made up of IGBT and anti-paralleled diode.Described electric capacity is connected with upper and lower brachium pontis and is formed closed-loop path.The mid point of upper and lower brachium pontis and the electric capacity negative pole end points of drawing is as the port of half-bridge structure power model output voltage.By-pass switch and thyristor are in parallel with lower brachium pontis respectively, for excision and the protection of half-bridge structure power model during short trouble.
The each tested valve section of described tested side is composed in series by multiple half-bridge structure power model of test that needs.Described examination side of accompanying is tried valve section formed by being accompanied of being connected with charging system, and described accompanying tries valve section and be composed in series by multiple half-bridge structure power model.The number of the half-bridge structure power model that each tested valve section comprises with accompany that to try the half-bridge structure power model number that valve section comprises equal.
The secondary circuit of proving installation of the present invention mainly comprises half-bridge structure power model internal control monitoring board, Communication Card and terminal PC.Communication Card is the intermediate link of secondary circuit, and it is connected with half-bridge structure power model internal monitoring board and terminal PC respectively by optical fiber, is the carrier of multiple half-bridge structure power model and terminal PC communication.Monitoring board from terminal PC to the internal control of half-bridge structure power model is downgoing communication link, and terminal PC issues the steering order to each half-bridge structure power model; Snapping into terminal PC from half-bridge structure power model internal control monitoring board is uplink communication link; each half-bridge structure power model internal control monitoring board uploads the signals such as this module I GBT state, capacitance voltage, failure message and temperature to terminal PC, for the enforcement of control and overcurrent protection provides necessary electric quantity information.Simultaneously by the important quantity of state of terminal PC screen display to facilitate real-time observation.The test that secondary circuit is converter valve half-bridge structure power model provides necessary control, protection and Presentation Function.
Described terminal PC comprises the display device of the information that each half-bridge structure power model of energy screen display is uploaded and automatically can generate the CPU of steering order according to the information that half-bridge structure power model is uploaded.
Described Communication Card, is half-bridge structure power model internal control monitoring board and the intermediate link of terminal PC communication, provides stable, communication link fast and accurately.
Described half-bridge structure internal control monitoring board is the carrier that secondary circuit controls monitoring primary circuit.It is inner that half-bridge structure internal control monitoring board is positioned in each half-bridge structure power model, is the intermediate link that secondary circuit is connected with primary circuit.Half-bridge structure internal control monitoring board jig is standby to be gathered the information such as half-bridge structure power model IGBT state, capacitance voltage, malfunction and temperature and is uploaded to the function of terminal PC, and the steering order that issues of receiving terminal PC drive IGBT to make the function of correct operation.
Except above-mentioned proving installation, also need when carrying out testing experiment to use current sensor, for measuring the size of current flow through in primary circuit.
Proving installation of the present invention can carry out internal capacitance charging measurement, steady-state operation test and short-circuit test to half-bridge structure power model.
Principle and the step of every test event are as follows:
1, half-bridge structure power model charging measurement
Described half-bridge structure power model charging measurement comprises not controlled charging test and controllable aerating electrical testing.
When half-bridge structure power model internal capacitance voltage is lower, the self-energizing power supply of half-bridge structure power model inside cannot be made normally to work, self-energizing power supply cannot give IGBT drive plate normal power supply, and therefore the IGBT of half-bridge structure power model upper and lower bridge arm cannot action.In this case can only be come to the charging of half-bridge structure power model internal capacitance by the anti-paralleled diode of brachium pontis on half-bridge structure power model, this link is called not controlled charging.Normally work after required minimum voltage when half-bridge structure power model internal capacitance to make its voltage reach self-energizing power supply by not controlled charging, described self-energizing power supply can give IGBT drive plate normal power supply, now can continue to the capacitor charging of inside by the IGBT controlling half-bridge structure power model upper and lower bridge arm, this link is called controlled charging.
Compared with existing converter valve half-bridge structure power module test device, proving installation of the present invention is due to tested side and accompany the valve hop count amount that comprises of examination side unequal, thus the half-bridge structure power model quantity that comprises of both sides is not etc., therefore cannot, as existing proving installation, only adopt not controlled charging tested side half-bridge structure power model capacitance voltage can be flushed to rated voltage.Apparatus of the present invention in charging measurement link, the controlled charging strategy needing to adopt tested side tested valve section to drop in turn on the basis of not controlled charging by all tested sides half-bridge structure power model capacitor charging to rated voltage.In addition, apparatus of the present invention are compared with existing apparatus, current-limiting resistance is not introduced in the charge circuit of above-mentioned charging link, but adopt PWM charging strategy to play the effect of dash current when suppressing charging, namely control to accompany the module of examination valve section to drop into by PWM method, the dutycycle initial value of control signal is 0, then from charging start time slowly increase, so with limit charge time dash current size.
Between tested half-bridge structure power model charge period, use described PWM method by the anti-paralleled diode of half-bridge structure power model to tested side half-bridge structure power model not controlled charging, the control strategy that use order drops into after the self-energizing power supply of module normally works carries out PWM charging to a tested valve section, the half-bridge structure power model of other tested valve sections controls excision, repeats above-mentioned steps afterwards until all tested half-bridge structure power model chargings are complete.During the steady-state operation of tested half-bridge structure power model, first a tested valve section is dropped into, control other tested valve sections of excision, then modulate the alterating and direct current flow component required for test as requested, repeat above-mentioned steps afterwards until all tested half-bridge structure power model steady state tests are complete.
The step that the present invention carries out not controlled charging test is as follows:
In not controlled charging link, suppose to accompany half-bridge structure power model number contained by examination side to be N, N contained by tested side, tested valve section number is k, k>0; Contained by each tested valve section, half-bridge structure power model number is N, N contained by side, half-bridge structure power model number is k × N.Half-bridge structure power model internal capacitance rated voltage is U.Accompany N number of half-bridge structure power model of examination side to utilize PWM charging strategy, carry out not controlled charging by tested side k × N number of half-bridge structure power model of half-bridge structure power model inner counter parallel diode to tested side.Suppose every a charge cycle T, T>0, accompany examination side to accompany the IGBT action of examination valve section half-bridge structure power model once, definition IGBT once turn off with a conducting be action once.Supposing IGBT conducting or turning off the minimum time continued is unit time Δ, 0< Δ <T.The N number of half-bridge structure power model in examination side excise after will be accompanied in first charge cycle T to drop into a unit interval Δ; The N number of half-bridge structure power model in examination side excise after will be accompanied in second charge cycle T to drop into two unit interval i.e. 2 Δs; Excise after the N number of half-bridge structure power model in examination side will be accompanied in the 3rd charge cycle T to drop into three unit interval i.e. 3 Δs, by that analogy.After a T/ Δ charge cycle, accompany the N number of half-bridge structure power model in examination side to drop into, now controlled charging does not terminate, and k × N number of half-bridge structure power model internal capacitance voltage of tested side can be charged to U/k stably always.By detecting half-bridge structure power model internal capacitance voltage whether near expection magnitude of voltage, half-bridge structure power model internal capacitance anti-paralleled diode that is whether intact and upper brachium pontis can be checked whether intact.Whether the self-energizing power supply status uploaded by detection half-bridge structure power model internal monitoring system is to check self-energizing power supply intact.
The step that the present invention carries out controllable aerating electrical testing is as follows:
First control brachium pontis IGBT conducting on the whole half-bridge structure power models contained by a tested valve section, lower brachium pontis IGBT turns off; Control brachium pontis IGBT on all the other k-1 the whole half-bridge structure power models contained by tested valve section to turn off, lower brachium pontis IGBT conducting.Accompany N number of half-bridge structure power model of examination side to utilize above-mentioned PWM charging strategy, carry out controlled charging to N number of half-bridge structure power model by the upper brachium pontis IGBT of the N number of conducting in tested side.The N number of half-bridge structure power model in examination side excise after will be accompanied in first charge cycle T to drop into a unit interval Δ; The N number of half-bridge structure power model in examination side excise after will be accompanied in second charge cycle T to drop into two unit interval i.e. 2 Δs; Excise after the N number of half-bridge structure power model in examination side will be accompanied in the 3rd charge cycle T to drop into three unit interval i.e. 3 Δs, by that analogy.After a T/ Δ charge cycle, accompany the N number of half-bridge structure power model in examination side to drop into, now controlled charging terminates, and this N number of half-bridge structure power model internal capacitance voltage charges to U from U/k always.Afterwards above-mentioned controlled charging is carried out, until tested side k × N number of half-bridge structure power model internal capacitance voltage reaches ratings U to other k-1 tested valve sections.By detect half-bridge structure power model internal capacitance voltage whether near expection magnitude of voltage and the module status information uploaded of internal monitoring system to check, whether upper and lower bridge arm IGBT intact, whether the interaction of control system and main circuit correct.
The PWM charging strategy implementation method that controlled charging is not tested and controllable aerating electrical testing uses is as follows: every a charge cycle T time, accompanies examination side to accompany the IGBT action of examination valve section half-bridge structure power model once.In first charge cycle T, in initial delta time, brachium pontis IGBT conducting on this half-bridge structure power model of control, lower brachium pontis IGBT turn off; In T-delta time afterwards, control brachium pontis IGBT shutoff, lower brachium pontis IGBT conducting on this half-bridge structure power model, excise after namely allowing this half-bridge structure power model drop into a unit making time Δ.In second charge cycle T, in 2 initial delta times, brachium pontis IGBT conducting on this half-bridge structure power model of control, lower brachium pontis IGBT turn off; In T-2 delta time afterwards, control brachium pontis IGBT shutoff, lower brachium pontis IGBT conducting on this half-bridge structure power model, excise after namely allowing this half-bridge structure power model drop into unit making time 2 Δ.In the 3rd charge cycle T, in 3 initial delta times, brachium pontis IGBT conducting on this half-bridge structure power model of control, lower brachium pontis IGBT turn off; In T-3 delta time afterwards, control brachium pontis IGBT shutoff, lower brachium pontis IGBT conducting on this half-bridge structure power model, namely excise after allowing this half-bridge structure power model drop into unit making time 3 Δ, by that analogy, namely allow half-bridge structure power model control signal dutycycle progressively increase.So can limit charging current during the tested valve section half-bridge structure power model charging of tested side, decrease the input of energy consumption and test components and parts.
2, steady-state operation test
Described steady-state operation test utilizes proving installation of the present invention and test circuit, produces bridge arm current during the actual steady-state operation of converter valve in the loop.During converter valve steady-state operation, bridge arm current composition mainly comprises industrial frequency AC component, two times of industrial frequency AC components and DC component.For producing above-mentioned bridge arm current composition, use nearest level approach method to modulate and accompany the voltage trying side and the output of tested side, make to accompany examination side and tested side all to produce alternating voltage waveform with DC voltage bias, make to accompany examination side identical with the DC voltage bias of tested side, the amplitude of alternating voltage is different with phase angle.Current component so in this test circuit comprises industrial frequency AC component, two times of industrial frequency AC components and DC component, thus operating mode when simulating the actual steady-state operation of converter valve.
Apply the steady-state operation test that proving installation of the present invention and the existing converter valve half-bridge structure power module test device of application carry out and have following difference: existing converter valve half-bridge structure power module test device accompany examination side and tested side comprise one or etc. the minority half-bridge structure power model of quantity, once test can only test minority half-bridge structure power model.Existing proving installation is comparatively simple at steady state test Absent measures strategy, if but complete the test circuit dismounting very repeatedly of a large amount of half-bridge structure power module test needs and the operation of tested half-bridge structure power model replacing, consuming time huge.Proving installation of the present invention tested side series connection is times over the half-bridge structure power model quantity of accompanying examination side, for keep accompanying examination side and tested side half-bridge structure power model in capacitor voltage balance, therefore the tested valve section that should control tested side drops in turn and carries out steady-state operation test.Proving installation of the present invention tests link in steady-state operation, control strategy is comparatively complicated, but avoid the operation of repeatedly circuit dismounting and the replacing of half-bridge structure power model, be more applicable for the converter valve half-bridge structure power module test of the engineering project of half-bridge structure power model substantial amounts.
During steady-state operation test, the current data uploaded by current sensor in test loop can detect interchange contained by electric current, whether DC component meets the demands.Running status whether is met with access control system and the interactional correctness of main circuit by detection electric current, voltage relationship.Whether the IGBT temperature data uploaded by test half-bridge structure power model internal temperature sensor are met the requirements to detect IGBT heat radiation.
3, short-circuit test
Described short-circuit test is the short circuit being realized tested side half-bridge structure power model by the closed isolating switch K connected with short circuited inductance.The short-circuit current in time very short after short circuit, tested side half-bridge structure power model brachium pontis flow through is by the peak value of short-circuit current when reaching converter valve actual motion.
Apply proving installation of the present invention and have following difference with the short-circuit test that carries out of the existing proving installation of application: the tested side of existing proving installation comprises one or minority half-bridge structure power model, the peak value of short that produce engine request need realize by using very little short circuited inductance.Required short circuited inductance need be accurate to μ H rank, harsher to the requirement of stray inductance in test loop, and the size depending on short circuited inductance is to regulate the size of the peak value of short of generation.Proving installation of the present invention is multiple half-bridge structure power model because tested side comprises, and in short-circuit loop circuit breaker closing conjunction, can change the half-bridge structure power model number of input to regulate the size of peak value of short.Therefore, will the requirement to short circuited inductance size be relaxed, increase the range of adjustment of peak value of short.
Can detect by short-circuit test whether Over Current Protection System can excise input fast half-bridge structure power model when system is short-circuited fault, detect IGBT whether damage when short trouble and IGBT overcurrent time can turn off to determine whether the type selecting of IGBT meets the demand of engineering.
The present invention has following characteristics and advantage:
1. can test multiple half-bridge structure power model simultaneously, save test consuming time, improve efficiency, be particularly useful for the engineering project of half-bridge structure power model substantial amounts.
2. tested side half-bridge structure power model charging link adopts PWM charging strategy, and multiple half-bridge structure power model charges simultaneously, decreases the consuming time of charging, due to without the need to introducing charging resistor, reduces active loss during charging.
3., by the isolating switch on closed short-circuit loop, the short circuit of tested side can be carried out short-circuit test.According to the requirement of short-circuit current size and the size of actual short inductance, the tested side half-bridge structure power model number dropped into during adjustment short circuit, the size of short-circuit current can be adjusted under the constant prerequisite of short circuited inductance size, increase the range of adjustment of peak value of short, reduce the restriction of short circuited inductance to peak value of short.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of flexible direct current transmission converter valve half-bridge structure power module test device primary circuit of the present invention;
Fig. 2 is half-bridge structure power module architectures figure;
Fig. 3 is the principle schematic of the PWM charging strategy described in the present invention;
Fig. 4 is application PWM charging strategy current simulations oscillogram;
Fig. 5 is capacitance voltage oscillogram when tested half-bridge structure power model during application PWM charging strategy charges;
Current waveform figure when Fig. 6 is application order input control strategy during steady-state operation on load inductance L;
The oscillogram of short-circuit current when Fig. 7 is short-circuit test test.
Embodiment
The testing experiment utilizing apparatus of the present invention to carry out is further illustrated below in conjunction with the drawings and specific embodiments.
The present invention includes primary circuit and secondary circuit two parts.Primary circuit provides necessary physical connection for test, for converter valve half-bridge structure power module test provides necessary electrical connection, is the carrier of testing experiment.Secondary circuit effect has two: one display test parameters, two control and protection primary circuits.
The test parameter that the present invention utilizes the control of each inside modules to monitor board collection directly uploads to terminal computer display by secondary circuit, as: voltage, temperature, module status, module failure etc.Described secondary circuit and primary circuit are linked by described control monitoring board and connect.
As shown in Figure 1, proving installation of the present invention primary circuit comprise and accompany examination side, tested side and load inductance L.Accompany examination side and tested side to be connected by load inductance L and form closed-loop path.When apparatus of the present invention are used for short-circuit test, also comprise isolating switch K and short circuited inductance Ls, isolating switch K and short circuited inductance Ls is parallel to tested side.
Described examination side of accompanying is tried valve section formed by being accompanied of being connected with charging system, and described accompanying tries valve section and be composed in series by multiple half-bridge structure power model.Figure 2 shows that half-bridge structure power module architectures.Upper and lower brachium pontis, by-pass switch and thyristor that half-bridge structure power model is made up of electric capacity, IGBT and an anti-paralleled diode are formed.Above-mentioned electric capacity is connected with upper and lower brachium pontis and is formed closed-loop path.The mid point of upper and lower brachium pontis and the electric capacity negative pole end points of drawing is as the port of half-bridge structure power model output voltage.By-pass switch and thyristor are in parallel with lower brachium pontis respectively, for excision and the protection of half-bridge structure power model during short trouble.
Described examination valve section of accompanying is connected with charging system, and for the energy that electric capacity in supplementary test consumes, and auxiliary tested half-bridge structure power model is tested.
Described tested side is composed in series by multiple tested valve section, and each tested valve section is composed in series by multiple half-bridge structure power model of test that needs.The half-bridge structure power model number that each tested valve section comprises is equal with accompanying the half-bridge structure power model number trying valve section.
Described charging system is followed in series to form by AC network, three-phase transformer, diode rectifier bridge.The output terminal of diode rectifier bridge connects with the electric capacity of half-bridge structure power model.
Secondary circuit mainly comprises half-bridge structure power model internal control monitoring board, Communication Card and terminal PC.Communication Card is the intermediate link of secondary circuit, and it is connected with half-bridge structure power model internal monitoring board and terminal PC respectively by optical fiber, is the carrier of multiple half-bridge structure power model and terminal PC communication.Monitoring board from terminal PC to the internal control of half-bridge structure power model is downgoing communication link, and terminal PC issues the steering order to each half-bridge structure power model; Snapping into terminal PC from half-bridge structure power model internal control monitoring board is uplink communication link; each half-bridge structure power model internal control monitoring board uploads the signals such as this module I GBT state, capacitance voltage, failure message and temperature to terminal PC, for the enforcement of control and overcurrent protection provides necessary electric quantity information.Simultaneously by the important quantity of state of terminal PC screen display to facilitate real-time observation.The test that secondary circuit is converter valve half-bridge structure power model provides necessary control, protection and Presentation Function.
The concrete testing procedure applying proving installation of the present invention is as follows:
Step one, will accompany the capacitor charging of examination valve section half-bridge structure power model to rated voltage by described charging system.
Step 2, the half-bridge structure power model all to tested side carries out charging measurement.Adopt PWM charging strategy: first carry out not controlled charging by the electric capacity of anti-paralleled diode to tested side half-bridge structure power model of tested side all half-bridge structures power model, in first charge cycle T, brachium pontis IGBT conducting on the N number of half-bridge structure power model of examination side is accompanied in the interior control of initial delta time, lower brachium pontis IGBT turns off; In T-delta time afterwards, control to accompany brachium pontis IGBT shutoff on the N number of half-bridge structure power model of examination side, lower brachium pontis IGBT conducting, namely allow after accompanying the N number of half-bridge structure power model in examination side to drop into a unit making time Δ and excise.In second charge cycle T, brachium pontis IGBT conducting on the N number of half-bridge structure power model of examination side is accompanied in the interior control of 2 initial delta times, lower brachium pontis IGBT turns off; In T-2 delta time afterwards, control to accompany brachium pontis IGBT shutoff on the N number of half-bridge structure power model of examination side, lower brachium pontis IGBT conducting, namely allow after accompanying the N number of half-bridge structure power model in examination side to drop into Liang Ge unit making time 2 Δ and excise.In the 3rd charge cycle T, brachium pontis IGBT conducting on the N number of half-bridge structure power model of examination side is accompanied in the interior control of 3 initial delta times, lower brachium pontis IGBT turns off; In T-3 delta time afterwards, control to accompany brachium pontis IGBT shutoff on the N number of half-bridge structure power model of examination side, lower brachium pontis IGBT conducting, namely allow after accompanying the N number of half-bridge structure power model in examination side to drop into three unit making time 3 Δs and excise, by that analogy.After half-bridge structure power model inner self-energizing power supply in tested side normally works, the upper brachium pontis IGBT conducting, the lower brachium pontis IGBT that control all half-bridge structure power models of a tested valve section turn off, and namely drop into whole half-bridge structure power models of this tested valve section; The lower brachium pontis IGBT conducting, the upper brachium pontis IGBT that control all half-bridge structure power models of other tested valve sections turn off simultaneously, namely excise whole half-bridge structure power models of other tested valve sections, accompany examination valve section to complete the half-bridge structure power model capacitor charging to this tested valve section by said PWM charging strategy again.Repeat step 2 afterwards, until tested side all half-bridge structure power models internal capacitance charges to rated voltage, so far charging measurement is complete.
Step 3, after the whole half-bridge structure power model in tested side charges to rated capacity voltage, carries out steady-state operation test.The control strategy that employing order drops into, carries out steady-state operation test to tested side half-bridge structure power model in turn.First control upper brachium pontis IGBT shutoff, the lower brachium pontis IGBT conducting of accompanying examination side and tested side all half-bridge structures power model, excise all half-bridge structure power models; Then select a tested valve section to prepare to carry out steady-state operation test, other tested valve Duan Ze keep above-mentioned excision state always, and steady-state operation testing experiment preliminary work like this is complete.Use nearest level approach method to modulate and accompany the voltage trying valve section and this tested valve section output, make to accompany examination valve section and this tested valve section all to produce alternating voltage waveform with DC voltage bias, make to accompany examination valve section identical with the DC voltage bias of this tested valve section, the amplitude of alternating voltage is different with phase angle, thus the brachium pontis direct current produced on load inductance L when required flexible direct current transmission converter valve works and alternating current composition.Afterwards, step 3 is repeated, until all tested half-bridge structure power model steady-state operation testing experiments are complete to other tested valve sections.
Step 4, carry out short-circuit test, control upper brachium pontis IGBT shutoff, the lower brachium pontis IGBT conducting of accompanying examination side and tested side all half-bridge structures power model, namely excise all half-bridge structure power models, then the closed isolating switch K connected with short circuited inductance Ls, short-circuit test preliminary work like this is complete.According to the short-circuit current size that test needs; determine that short-circuit test needs the tested half-bridge structure power model number dropped into when carrying out institute; the trigger pip of brachium pontis IGBT conducting on these half-bridge structure power models, lower brachium pontis IGBT shutoff is given by control system; these modules are made to be in input state; carry out short-circuit test test, bear the ability of overcurrent to check half-bridge structure power model and can Over Current Protection System action.Afterwards, step 4 is repeated, until all tested half-bridge structure power model short-circuit tests are complete to other tested half-bridge structure power models.
Use PSCAD simulation software, carry out simulating, verifying to flexible direct current transmission converter valve proving installation of the present invention, design parameter is as follows:
Giving the link of tested side half-bridge structure power model charging, the PWM charging strategy described in application.Unit making time Δ is 10 μ s, charge cycle T is 1ms.
Fig. 3 is the charging current waveform of PWM charging control strategy emulation, and when its charging starts as seen, dash current peak value is about 14A, much smaller than brachium pontis alternating current effective value 800A during converter valve steady-state operation.
The voltage waveform of tested half-bridge structure power model electric capacity when Fig. 4 is the charging of PWM charging control strategy emulation, visible capacitance voltage steadily rises to ratings 1.7kV, and the duration of charging is about 7s.
Fig. 5 flows through the current waveform of load inductance L when being steady-state operation testing experiment, can meet direct-current component 500A, the test request of alternating current component 800A.
Fig. 6 is the short-circuit current waveform of short-circuit test test, and when short-circuit current reaches 4kA, Over Current Protection System starts, and all half-bridge structure power models of locking, short-circuit current is reduced to 0 very soon.

Claims (4)

1. a flexible direct current transmission converter valve half-bridge structure power module test device, is characterized in that: described flexible direct current transmission converter valve half-bridge structure power module test device comprises primary circuit and secondary circuit two parts; Primary circuit provides electrical connection for converter valve half-bridge structure power module test, is the carrier of testing experiment; Secondary circuit is used for control and protection primary circuit, and shows test parameter; Described secondary circuit and primary circuit are linked by the control monitoring board in flexible direct current transmission converter valve half-bridge structure power model and connect.
2. flexible direct current transmission converter valve half-bridge structure power module test device as claimed in claim 1, is characterized in that: described primary circuit comprises accompanies examination side, tested side, load inductance and the short circuited inductance Ls needed for short-circuit test and isolating switch K; Accompany examination side and tested side to be connected by load inductance and form closed-loop path; Described tested side accompanies examination valve section to be connected by load inductance L with one, and isolating switch K and short circuited inductance Ls is in parallel with tested side after connecting is used for short-circuit test.
3. flexible direct current transmission converter valve half-bridge structure power module test device as claimed in claim 1, is characterized in that: described tested side is in series by multiple tested valve section, and described examination valve section of accompanying is composed in series by multiple half-bridge structure power model; Each tested valve section comprises tries the identical half-bridge structure power model of valve hop count amount with accompanying.
4. flexible direct current transmission converter valve half-bridge structure power module test device as claimed in claim 1, it is characterized in that: described flexible direct current transmission converter valve half-bridge structure power module test device controls to accompany the input of the half-bridge structure power model of examination valve section by PWM method, the dutycycle initial value of control signal is 0, then from charging start time slowly increase; Between the half-bridge structure power model charge period of tested valve section, by the anti-paralleled diode of half-bridge structure power model to tested side half-bridge structure power model not controlled charging, after the self-energizing power supply of the half-bridge structure power model of tested valve section normally works, the control method that use order drops into carries out PWM charging to a tested valve section, excise the half-bridge structure power model of all the other tested valve sections, repeat above-mentioned steps afterwards, until the half-bridge structure power model charging of all tested valve sections is complete; During the half-bridge structure power model steady-state operation of tested valve section, first a tested valve section is dropped into, excise all the other tested valve sections, then modulate the alterating and direct current flow component required for test as requested, repeat above-mentioned steps afterwards until the half-bridge structure power model steady state test of all tested valve sections is complete.
CN201510323891.9A 2015-06-12 2015-06-12 Flexible direct-current power-transmission converter-valve half-bridge structure power module test device Pending CN104991131A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105301406A (en) * 2015-11-16 2016-02-03 特变电工新疆新能源股份有限公司 Flexible direct-current power transmission valve segment short-circuit experiment testing system and testing method thereof
CN105305575A (en) * 2015-10-27 2016-02-03 中国科学院电工研究所 Charging method of flexible direct current power transmission converter valve testing device
CN106771992A (en) * 2016-11-09 2017-05-31 南方电网科学研究院有限责任公司 The measuring method and device of flexible direct current converter valve power cell voltage's distribiuting
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
CN110850197A (en) * 2019-10-22 2020-02-28 中国南方电网有限责任公司超高压输电公司检修试验中心 MMC power module overvoltage thyristor bypass test method
CN111781532A (en) * 2020-07-10 2020-10-16 北京交通大学 Circuit and method for realizing aging experiment of three-phase inverter power module

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102118019A (en) * 2011-01-14 2011-07-06 中国电力科学研究院 Modularized multi-level converter sub-module control and protection method
CN102323546A (en) * 2011-08-25 2012-01-18 中国电力科学研究院 Back-to-back test method of VSC-HVDC MMC valve stable state operation test
CN103048596A (en) * 2012-12-14 2013-04-17 国网智能电网研究院 End-to-end direct-current voltage withstand testing device and method of MMC (modular multilevel converter) valve
CN103063945A (en) * 2012-12-11 2013-04-24 国网智能电网研究院 Flexible direct current transmission sub-module test device and test method thereof
CN103197241A (en) * 2013-03-20 2013-07-10 许继集团有限公司 Testing device and testing method of flexible direct-current transmission modular multilevel converter (MMC) converter valve operating
CN103487678A (en) * 2013-09-09 2014-01-01 南京南瑞继保电气有限公司 Portable power module test system and test method
US20140055888A1 (en) * 2011-05-10 2014-02-27 Abb Research Ltd Power module and method of operating a power module
CN103728508A (en) * 2013-12-05 2014-04-16 国家电网公司 Device and method for testing steady-state operation of MMC flexible direct current sub-module
CN104678246A (en) * 2015-02-03 2015-06-03 国网上海市电力公司 Method and system for evaluating corrosion state of transformer substation grounding grid

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102118019A (en) * 2011-01-14 2011-07-06 中国电力科学研究院 Modularized multi-level converter sub-module control and protection method
US20140055888A1 (en) * 2011-05-10 2014-02-27 Abb Research Ltd Power module and method of operating a power module
CN102323546A (en) * 2011-08-25 2012-01-18 中国电力科学研究院 Back-to-back test method of VSC-HVDC MMC valve stable state operation test
CN103063945A (en) * 2012-12-11 2013-04-24 国网智能电网研究院 Flexible direct current transmission sub-module test device and test method thereof
CN103048596A (en) * 2012-12-14 2013-04-17 国网智能电网研究院 End-to-end direct-current voltage withstand testing device and method of MMC (modular multilevel converter) valve
CN103197241A (en) * 2013-03-20 2013-07-10 许继集团有限公司 Testing device and testing method of flexible direct-current transmission modular multilevel converter (MMC) converter valve operating
CN103487678A (en) * 2013-09-09 2014-01-01 南京南瑞继保电气有限公司 Portable power module test system and test method
CN103728508A (en) * 2013-12-05 2014-04-16 国家电网公司 Device and method for testing steady-state operation of MMC flexible direct current sub-module
CN104678246A (en) * 2015-02-03 2015-06-03 国网上海市电力公司 Method and system for evaluating corrosion state of transformer substation grounding grid

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105305575A (en) * 2015-10-27 2016-02-03 中国科学院电工研究所 Charging method of flexible direct current power transmission converter valve testing device
CN105301406A (en) * 2015-11-16 2016-02-03 特变电工新疆新能源股份有限公司 Flexible direct-current power transmission valve segment short-circuit experiment testing system and testing method thereof
CN105301406B (en) * 2015-11-16 2018-03-27 特变电工新疆新能源股份有限公司 A kind of flexible direct-current transmission valve section short-circuit test test system and its method of testing
CN106771992A (en) * 2016-11-09 2017-05-31 南方电网科学研究院有限责任公司 The measuring method and device of flexible direct current converter valve power cell voltage's distribiuting
CN106771992B (en) * 2016-11-09 2019-06-28 南方电网科学研究院有限责任公司 The measurement method and device of flexible direct current converter valve power cell voltage's distribiuting
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
CN110850197A (en) * 2019-10-22 2020-02-28 中国南方电网有限责任公司超高压输电公司检修试验中心 MMC power module overvoltage thyristor bypass test method
CN111781532A (en) * 2020-07-10 2020-10-16 北京交通大学 Circuit and method for realizing aging experiment of three-phase inverter power module
CN111781532B (en) * 2020-07-10 2021-06-08 北京交通大学 Circuit and method for realizing aging experiment of three-phase inverter power module

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Application publication date: 20151021