CN205693375U - A kind of gamma kick device - Google Patents
A kind of gamma kick device Download PDFInfo
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- CN205693375U CN205693375U CN201620539317.7U CN201620539317U CN205693375U CN 205693375 U CN205693375 U CN 205693375U CN 201620539317 U CN201620539317 U CN 201620539317U CN 205693375 U CN205693375 U CN 205693375U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
Embodiment of the present utility model provides a kind of gamma kick device, relates to direct current transportation field, it is possible to shorten the time consumed from commutation failure to the transient process recovering commutation.The specific scheme is that gamma kick device includes blow-out angle compensation module, gating module and control module；Control module determines when transmission system is currently at transient process, the blow-out angle reference value signal of instruction gating module output blow-out angle compensation module output；Control module determines when transmission system is currently at normal course of operation, and instruction gating module output is without the blow-out angle reference value signal compensated.This utility model controls for direct current transportation.
Description
Technical field
This utility model relates to direct current transportation field, particularly relates to a kind of gamma kick device.
Background technology
In HVDC transmission system, commutation failure is a kind of fault that inverter the most often occurs, commutation failure refers to
When two valves of DC transmission system inverter carry out commutation, fail because of commutation process or switched what phase was caused
Fault.Such as, it is contemplated that after the valve breakdown of shutoff, fail to recover blocking ability, when the electricity being added on this valve during backward voltage
Pressure is timing, the most again turns on, just there occurs and switch phase, makes the anticipated valve opened again turn off and causing trouble.
Occur commutation failure that DC voltage will be caused to decline and DC current increases, if the control measure taked are improper, lead
The cause inverter single commutation failure time exceedes the AC system primitive period, or when causing continuous several times commutation failure, direct current is defeated
Electricity system will enter locking or bypass state, cause the interruption of direct current transmission power so that the poor stability of operation of power networks.
Prior art uses determines the mode of gamma kick, will be maintained at the mode of some set-point in blow-out angle, with
Avoid commutation failure as far as possible.In the case of inverter commutation is normal, keeping blow-out angle is that set-point is beneficial to transmission system guarantor
Hold its stability.But, once occur in that commutation failure, original set-point are often unfavorable for that transmission system is rapid from fault
Recover.
Concrete, after commutation failure, transmission system needs the transient process through recovering to commutation from commutation failure, then
Recovering power transmission, and original set-point is not blow-out angle set-point optimal in this transient process, this can cause temporarily
The time that state process is consumed is longer, say, that from occurring that the process that commutation failure recovers power transmission to straight-flow system is time-consuming
Longer, thus it is unfavorable for that DC transmission system recovers rapidly power transmission after commutation failure.
Utility model content
The application provides a kind of gamma kick device, it is possible to shortens and is disappeared from commutation failure to the transient process recovering commutation
The time of consumption, accelerate DC transmission system and recover the speed of power transmission.
For reaching above-mentioned purpose, the application adopts the following technical scheme that
Blow-out angle compensation module, gating module and control module；
Described blow-out angle compensation module, for receiving triggering signal U (s) of gamma kick, after U (s) is compensated, to
The first input end output of described gating module compensates and triggers signalWherein Kγ、TγIt is respectively one order inertia ring
The scale parameter of joint and time constant；Second input of described gating module connects U (s)；
Described control module includes four inputs；Wherein first input end is used for receiving inverter side change of current busbar voltage letter
Number UL, ULFor indicating the magnitude of voltage of inverter side change of current bus；Second input is used for receiving transient state critical voltage signal UCL, UCL
When entering transient process after indicating described HVDC transmission system that commutation failure occurs, inverter side change of current busbar voltage
Marginal value；3rd input is used for receiving normality critical voltage signal UCL1, UCL1For indicating described HVDC transmission system
When transient process returns to properly functioning, the marginal value of inverter side change of current busbar voltage；Four-input terminal is used for receiving voltage
Fluctuation restriction signal | ε |, | ε | be used for indicating described HVDC transmission system when transient process returns to properly functioning, inverse
Become the lower limit of side change of current busbar voltage rate of change；
Described control module includes two outfans；First outfan of described control module connects described gating module
3rd input；Second outfan of described control module connects the four-input terminal of described gating module；Described control module
For according to ULAnd UCLGenerate the first gating signal, and by the first described first gating of outfan output of described control module
Signal；Described control module is additionally operable to according to UL、UCL1And | ε | generates the second gating signal, and by described control module
Second outfan exports described second gating signal；
Described gating module, for after receiving described first gating signal, gates described compensation and triggers signalAs blow-out angle reference value signal γref-T(s)；It is additionally operable to after receiving described second gating signal,
Gate described triggering signal U (s) as blow-out angle reference value signal γref-T(s)。
Gamma kick device provided by the utility model, according to UL、UCL、UCL1And | ε | determines that transmission system is currently located
In transient process or normal course of operation.If normal course of operation, i.e. inverter commutation are normal, now output blow-out JIAOSHEN
Examine value signal γref-TS ()=U (s), when transmission system is properly functioning by determining gamma kick, keeps transmission system stable
Run.If transient process, i.e. Commutation Failure, now export the blow-out angle reference value signal through overcompensationThus shorten the time shared by transient process, accelerate DC transmission system and recover power biography
Defeated speed.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
In description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to root
Other accompanying drawing is obtained according to these accompanying drawings.
The structural representation of the gamma kick device that Fig. 1 is provided by embodiment of the present utility model；
Another structural representation of the gamma kick device that Fig. 2 is provided by embodiment of the present utility model；
The compensation dosage at blow-out angle is changed over by the gamma kick device that Fig. 3 is provided by embodiment of the present utility model
The schematic diagram of process；
Fig. 4 is blow-out angle to compensate before and after's blow-out angle change over the contrast schematic diagram of process.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Prior art uses the mode that blow-out angle is maintained at some set-point, avoids commutation failure.For ease of
Describe, this set-point is referred to as given blow-out angle.Gamma kick device by output one constant blow-out angle reference value signal,
Indicate the specific size at given blow-out angle.
After occurring in that commutation failure, first it is also contemplated that the problem of fault recovery, in the normal feelings of inverter commutation
Under condition, blow-out angle is maintained at given blow-out angle and can keep transmission system stable operation well, but in fault recovery
Cheng Zhong, given blow-out angle is not blow-out angle set-point optimal in transient process, thus existing to determine gamma kick unfavorable
After commutation failure, power transmission is recovered rapidly in DC transmission system.
The purpose of the application is to provide a kind of gamma kick device, in the case of inverter commutation is normal, for just
Situation one the blow-out angle reference value signal of output often run, thus its stable operation is kept when transmission system is properly functioning,
And in the case of commutation failure, export a blow-out angle reference value signal through overcompensation for transient process, thus shorten
Time shared by transient process, accelerate DC transmission system and recover the speed of power transmission.
Embodiment
Embodiment of the present utility model provides a kind of gamma kick device, is installed on the inversion of HVDC transmission system
Side, with reference to shown in Fig. 1, gamma kick device 1 includes:
Blow-out angle compensation module 11, gating module 12 and control module 13.
Blow-out angle compensation module 11, for receiving triggering signal U (s) of gamma kick, after compensating U (s), Xiang Xuan
First input end 121 output of logical module 12 compensates and triggers signalWherein Kγ、TγIt is respectively one order inertia ring
The scale parameter of joint and time constant.Second input 122 of gating module 12 connects U (s).
Control module 13 includes four inputs.Wherein first input end 131 is used for receiving inverter side change of current busbar voltage
Signal UL, ULFor indicating the magnitude of voltage of inverter side change of current bus.Second input 132 is used for receiving transient state critical voltage signal
UCL, UCLWhen entering transient process after indicating HVDC transmission system that commutation failure occurs, inverter side change of current busbar voltage
Marginal value.3rd input 133 is used for receiving normality critical voltage signal UCL1, UCL1For indicating HVDC transmission system
When transient process returns to properly functioning, the marginal value of inverter side change of current busbar voltage.Four-input terminal 134 is used for receiving electricity
Pressure fluctuation restriction signal | ε |, | ε | be used for indicating HVDC transmission system when transient process returns to properly functioning, inversion
The lower limit of side change of current busbar voltage rate of change.
Control module 13 includes two outfans.First outfan 135 of control module 13 connects the of gating module 12
Three inputs 123.Second outfan 136 of control module 13 connects the four-input terminal 124 of gating module 12.Control module 13
For according to ULAnd UCLGenerate the first gating signal, and export the first gating letter by the first outfan 135 of control module 13
Number.Control module 13 is additionally operable to according to UL、UCL1And | ε | generates the second gating signal and defeated by the second of control module 13
Go out end 136 output the second gating signal.
The outfan 125 of gating module 12 is used for exporting blow-out angle reference value signal γref-T(s)。
Gating module 12 is after receiving the first gating signal, by outfan 125 and the gating module of gating module 12
The first input end 121 of 12 connects, and strobe compensation triggers signalAs blow-out angle reference value signal γref-T(s)
Output, i.e.
Gating module 12 is after receiving the second gating signal, by outfan 125 and the gating module of gating module 12
Second input 122 of 12 connects, and gating triggers signal U (s) as blow-out angle reference value signal γref-TS () exports, i.e.
γref-T(s)=U (s).
Shown in Fig. 2, in a kind of specific embodiment, control module 13 includes: transient state control module 131 is with often
State control module 132.
The structure of transient state control module 131:
Transient state control module 131 includes two inputs, and wherein first input end is used for connecting UL, the second input is used for
Connect UCL.Transient state control module 131 is for according to ULAnd UCLGenerate the first gating signal.
Optionally, transient state control module 131 is comparator.Owing to hereinafter there is also comparator, for ease of distinguishing position
In the comparator of diverse location, the present embodiment is distinguished with " the first comparator ", " the second comparator " such description.Transient state control
Molding block 131 is specially the first comparator, when the first comparator determines UL＜ UCLTime, generate the first gating signal.First compares
The outfan of device, as the first outfan 135 of control module 13, exports the first gating signal.
The structure of normality control module 132:
Normality control module 132 includes three inputs, and wherein first input end is used for connecting UL, the second input is used for
Connect UCL1.3rd input is used for connecting | ε |.Normality control module 132 is for according to UL、UCLAnd generate the second gating letter
Number.
Optionally, normality control module 132 includes: the second comparator 132A, the 3rd comparator 132B, differentiator 132C,
And logic and operation device 132D.
Two inputs of the second comparator 132A connect U respectivelyLAnd UCL1。
The input of differentiator 132C connects UL。
Two inputs of the 3rd comparator 132B connect outfan and | ε | of differentiator 132C respectively.
Two inputs of logic and operation device 132D connect outfan and the 3rd ratio of the second comparator 132A respectively
The relatively outfan of device 132B.When the second comparator 132A determines UL＞ UCL1, and the 3rd comparator 132B determinesTime, patrol
Collect and generate the second gating signal with 132D arithmetical unit.The outfan of logic and operation device 132D is as the second of control module 13
Outfan 136, exports the second gating signal.
In conjunction with the concrete structure of the gamma kick device 1 shown in Fig. 2, first gamma kick device 1 receives the inverter change of current
Bus voltage signal ULAmplitude and rate of change
Work as ULMarginal value U during transient process is entered less than transmission systemCLTime, determine that transmission system is in transient process,
Now strobe compensation triggers signalAs blow-out angle reference value signal γref-T(s), now
That is, UL＜ UCLTime,
DC transmission system transient process after commutation failure during the recovery of normal course of operation,For just,
Represent change of current bus voltage signal ULIt is gradually increasing, works as climbing speedExceed | ε | and rise above transmission system entrance
Marginal value U during normal course of operationCL1Time, gating triggers signal U (s), as blow-out angle reference value signal γref-T(s), this
Time γref-T(s)=U (s).
That is, whenAnd UL＞ UCL1Time, γref-T(s)=U (s).
As a example by CIGRE-1DC standard DC transmission system model in PSCAD electromagnetic transients program, verify this
The control effect of the gamma kick device 1 that embodiment is provided.
Consider that receiving end AC system is weak pattern system, take SCR=2.5, and Inverter Station change of current busbar voltage generation single-phase earthing
Fault, in the case of trouble duration is 50ms.In a kind of concrete application scenarios, in transient process to properly functioning mistake
In the transient process of journey, the compensation dosage at blow-out angle is changed as it is shown on figure 3, compensation dosage is gradually increased in transient process, maximum
Can reach 25 °.After transient process terminates, compensation dosage makes zero.
Fig. 4 show after blow-out angle compensates in transient process by gamma kick device 1, the blow-out angle change of inverter side
Curve (shown in solid in Fig. 4), and blow-out angle change curve (in Fig. 4 shown in dotted line) in the case of compensating.
In conjunction with Fig. 3, after breaking down when 2.0 seconds, in the case of compensating, blow-out angle is about extensive when 2.8 seconds
Multiple to 15 °, the time that transient process takies is 0.8 second.Controller 1 add compensate in the case of, blow-out angle 2.2 seconds time
Time is then restored to 15 °, and the time that transient process takies is 0.2 second, and transient process shortens to original 25%.Visible the present embodiment
The controller 1 provided, can be greatly shortened the time shared by transient process, thus accelerate DC transmission system and recover power
The speed of transmission.
Gamma kick device provided by the utility model, according to UL、UCL、UCL1And | ε | determines that transmission system is currently located
In transient process or normal course of operation.If normal course of operation, i.e. inverter commutation are normal, now output blow-out JIAOSHEN
Examine value signal γref-TS ()=U (s), when transmission system is properly functioning by determining gamma kick, keeps transmission system stable
Run.If transient process, i.e. Commutation Failure, now export the blow-out angle reference value signal through overcompensationThus shorten the time shared by transient process, accelerate DC transmission system and recover power biography
Defeated speed.
The above, detailed description of the invention the most of the present utility model, but protection domain of the present utility model does not limit to
In this, any those familiar with the art, in the technical scope that this utility model discloses, can readily occur in change
Or replace, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should be described with power
The protection domain that profit requires is as the criterion.
Claims (4)
1. a gamma kick device, is installed on the inverter side of HVDC transmission system, it is characterised in that including:
Blow-out angle compensation module, gating module and control module；
Described blow-out angle compensation module, for receiving triggering signal U (s) of gamma kick, after compensating U (s), to described
The first input end output of gating module compensates and triggers signalWherein Kγ、TγIt is respectively first order inertial loop
Scale parameter and time constant；Second input of described gating module connects U (s)；
Described control module includes four inputs；Wherein first input end is used for receiving inverter side change of current bus voltage signal UL,
ULFor indicating the magnitude of voltage of inverter side change of current bus；Second input is used for receiving transient state critical voltage signal UCL, UCLFor
When indicating described HVDC transmission system to occur entering transient process after commutation failure, inverter side change of current busbar voltage critical
Value；3rd input is used for receiving normality critical voltage signal UCL1, UCL1For indicating described HVDC transmission system from temporarily
When state process returns to properly functioning, the marginal value of inverter side change of current busbar voltage；Four-input terminal is used for receiving voltage pulsation
Restriction signal | ε |, | ε | be used for indicating described HVDC transmission system when transient process returns to properly functioning, inverter side
The lower limit of change of current busbar voltage rate of change；
Described control module includes two outfans；First outfan of described control module connects the 3rd of described gating module the
Input；Second outfan of described control module connects the four-input terminal of described gating module；Described control module is used for
According to ULAnd UCLGenerate the first gating signal, and by the described first gating letter of the first outfan output of described control module
Number；Described control module is additionally operable to according to UL、UCL1And | ε | generates the second gating signal, and by the of described control module
Two outfans export described second gating signal；
Described gating module, for after receiving described first gating signal, gates described compensation and triggers signalAs blow-out angle reference value signal γref-T(s)；It is additionally operable to after receiving described second gating signal, choosing
Logical described triggering signal U (s) is as blow-out angle reference value signal γref-T(s)。
Gamma kick device the most according to claim 1, it is characterised in that described control module includes: transient state controls mould
Block and normality control module；
Described transient state control module includes two inputs, and wherein first input end is used for connecting UL, the second input is used for connecting
UCL；Described transient state control module is for according to ULAnd UCLGenerate described first gating signal；
Described normality control module includes three inputs, and wherein first input end is used for connecting UL, the second input is used for connecting
UCL1；3rd input is used for connecting | ε |；Described normality control module is for according to UL、UCLAnd generate described second gating letter
Number.
Gamma kick device the most according to claim 2, it is characterised in that described transient state control module is first to compare
Device, when described first comparator determines UL＜ UCLTime, generate described first gating signal.
Gamma kick device the most according to claim 2, it is characterised in that described normality control module includes: the second ratio
Relatively device, the 3rd comparator, differentiator and logic and operation device；
Two inputs of described second comparator connect U respectivelyLAnd UCL1；
The input of described differentiator connects UL；
Two inputs of described 3rd comparator connect outfan and | ε | of described differentiator respectively；
Two inputs of described logic and operation device connect the outfan of described second comparator and described 3rd ratio respectively
The outfan of relatively device；When described second comparator determines UL＞ UCL1, and described 3rd comparator determinesTime, described in patrol
Collect and generate described second gating signal with arithmetical unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620539317.7U CN205693375U (en) | 2016-06-03 | 2016-06-03 | A kind of gamma kick device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620539317.7U CN205693375U (en) | 2016-06-03 | 2016-06-03 | A kind of gamma kick device |
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| CN205693375U true CN205693375U (en) | 2016-11-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787896A (en) * | 2017-03-02 | 2017-05-31 | 南方电网科学研究院有限责任公司 | Avoid blow-out angular measurement abnormal circuit and avoid direct current transportation commutation failure circuit |
| CN107181276A (en) * | 2017-06-26 | 2017-09-19 | 南方电网科学研究院有限责任公司 | The method and device that Hybrid HVDC system commutation failure recovers |
-
2016
- 2016-06-03 CN CN201620539317.7U patent/CN205693375U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787896A (en) * | 2017-03-02 | 2017-05-31 | 南方电网科学研究院有限责任公司 | Avoid blow-out angular measurement abnormal circuit and avoid direct current transportation commutation failure circuit |
| CN107181276A (en) * | 2017-06-26 | 2017-09-19 | 南方电网科学研究院有限责任公司 | The method and device that Hybrid HVDC system commutation failure recovers |
| CN107181276B (en) * | 2017-06-26 | 2019-09-27 | 南方电网科学研究院有限责任公司 | The method and device that Hybrid HVDC system commutation failure restores |
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Effective date of registration: 20210609 Address after: 510700 3rd, 4th and 5th floors of building J1 and 3rd floor of building J3, No.11 Kexiang Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee after: China Southern Power Grid Research Institute Co.,Ltd. Address before: 510080 West Tower, Yuedian building, No.8 shuijungang, Dongfeng East Road, Yuexiu District, Guangzhou City, Guangdong Province Patentee before: China Southern Power Grid Research Institute Co.,Ltd. Patentee before: CSG POWER GRID TECHNOLOGY RESEARCH CENTER |