CN104466985B - Chain type STATCOM DC voltage balance control system and control method - Google Patents
Chain type STATCOM DC voltage balance control system and control method Download PDFInfo
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- CN104466985B CN104466985B CN201410767433.XA CN201410767433A CN104466985B CN 104466985 B CN104466985 B CN 104466985B CN 201410767433 A CN201410767433 A CN 201410767433A CN 104466985 B CN104466985 B CN 104466985B
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- pang storage
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a kind of chain type STATCOM DC voltage balance control system and control method, the control method is：A. DC voltage asks difference module that the direct voltage reference value of the actual DC voltage of power model and setting is asked poor；B. revision directive generation module asks the DC voltage difference that difference module is obtained to generate revision directive according to the DC voltage；C. voltage instruction computing module receives the revision directive of revision directive generation module output and the voltage instruction of outside input, and obtains final voltage instruction come the size for changing voltage instruction with according to revision directive.The present invention using the balance control that chain type STATCOM dc-voltage balance is realized based on the control strategy of ping-pang storage principle, with control strategy letter, it is convenient that realize, saves the advantage of controller hardware resource by list.
Description
Technical field
The present invention relates to chain type STATCOM control technology field, and in particular to a kind of chain type based on ping-pang storage
STATCOM DC voltage balance control systems and control method.
Background technology
Chain type STATCOM is that a kind of flexible AC transmission based on modular multilevel voltage source converter technology is filled
Put.In order to adapt to high voltage and jumbo application demand, chain type STATCOM employs the circuit structure of multiplex.Chain type
The multiple circuit structure that STATCOM is adopted has high application flexibility, per circuitry phase by 26S Proteasome Structure and Function identical work(
Rate block coupled in series is constituted.Direct current capacitors be there are in the power model of composition chain type STATCOM, it is straight in these direct current capacitors
The balance of stream voltage is that chain type STATCOM ensures output voltage waveforms quality, the precondition of system stability reliably working, therefore
The balance control of DC voltage in the direct current capacitors of power model is must solve in chain type STATCOM control strategy important
One of problem.In the three-phase circuit of direct current capacitors series connection chain type STATCOM of power model, on the one hand as electric current flows through directly
Stream capacitor causes its DC voltage to there is certain voltage pulsation, and the DC voltage of another aspect direct current capacitors contains two
Order harmonic components also cause the fluctuation of its DC voltage, how to control voltage pulsation with direct current capacitors and stable chain type
The output of STATCOM is a hot research direction of current chain type STATCOM control strategy.
The content of the invention
The present invention seeks to：For the deficiencies in the prior art, the present invention proposes a kind of chain type based on ping-pang storage
STATCOM DC voltage balance control systems and control method, the control method is using the control plan based on ping-pang storage principle
The balance control of chain type STATCOM dc-voltage balance is realized slightly, it is with control strategy letter, single to realize conveniently, saving controller
The advantage of hardware resource.
The technical scheme is that：A kind of chain type STATCOM DC voltage balance control system based on ping-pang storage,
The system includes：
DC voltage seeks difference module, for the direct voltage reference value of the actual DC voltage of power model and setting is asked
Difference；
Revision directive generation module, repaiies for asking the DC voltage difference that difference module is obtained to generate according to the DC voltage
Positive order；
Voltage instruction computing module, for receiving the revision directive of revision directive generation module output and the electricity of outside input
Pressure instruction, and final voltage instruction is obtained come the size for changing voltage instruction with according to revision directive.
Preferably, the revision directive generation module is by comparison module, multi-path choice module and at least two table tennises
Control module is constituted, wherein,
The comparison module is compared and is exported for the threshold value by the DC voltage difference of input with inner setting
The startup order of ping-pang storage module；
The startup command selection of ping-pang storage module of the multi-path choice module for being exported according to the comparison module
Corresponding ping-pang storage module；
Described each ping-pang storage module selects letter for the ping-pang storage module exported according to the multi-path choice module
Number and select a startup, and finally produce revision directive.
Preferably, the ping-pang storage module has three, respectively the first ping-pang storage module, the second ping-pang storage
Module and the 3rd ping-pang storage module.
A kind of chain type STATCOM DC voltage balance control method based on ping-pang storage, the method is：
A. DC voltage asks difference module that the direct voltage reference value of the actual DC voltage of power model and setting is asked poor；
B. revision directive generation module asks the DC voltage difference that difference module is obtained to generate amendment according to the DC voltage
Instruction；
C. voltage instruction computing module receives the revision directive of revision directive generation module output and the voltage of outside input
Instruction, and final voltage instruction is obtained come the size for changing voltage instruction with according to revision directive.
Preferably, in step b, the revision directive generation module by comparison module, multi-path choice module, with
And at least two ping-pang storage module compositions, wherein, the comparison module is by the DC voltage difference and the inner setting that are input into
Threshold value is compared and exports the startup order of ping-pang storage module, and the multi-path choice module is defeated according to the comparison module
The corresponding ping-pang storage module of startup command selection of the ping-pang storage module for going out, described each ping-pang storage module is according to described
The ping-pang storage module select signal of multi-path choice module output and select a startup, and finally produce revision directive.
Preferably, the ping-pang storage module has three, respectively the first ping-pang storage module, the second ping-pang storage
Module and the 3rd ping-pang storage module.
It is an advantage of the invention that：The present invention is adopted and realizes that chain type STATCOM is straight based on the control strategy of ping-pang storage principle
The balance control of the stream balance of voltage, with control strategy letter, single realization is convenient, saves the advantage of controller hardware resource.
Description of the drawings
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Fig. 1 is the original of the chain type STATCOM DC voltage balance control method in the embodiment of the present invention based on ping-pang storage
Reason figure.
Fig. 2 is the fundamental diagram of revision directive generation module.
Wherein：1- DC voltages ask difference module, 2- revision directive generation modules, 3- voltage instruction computing modules, 4- to compare
Module, 5- multi-path choice modules, 6- the first ping-pang storage modules, 7- the second ping-pang storage modules, the 3rd ping-pang storage modules of 8-.
Specific embodiment
Embodiment：
With reference to shown in Fig. 1, this chain type STATCOM DC voltage based on ping-pang storage provided by the embodiment of the present invention
Balance control system, which includes that DC voltage asks difference module 1, revision directive production module 2 and voltage instruction computing module 3, its
In, DC voltage seeks difference module 1 for the direct voltage reference value of the actual DC voltage of power model and setting is asked poor, repaiies
Positive order generation module 2 is for asking the DC voltage difference that difference module 1 is obtained to generate revision directive according to the DC voltage, electric
Pressure instruction calculation module 3 is used for revision directive and the voltage instruction of outside input for receiving the output of revision directive generation module 2, and
The size for changing voltage instruction with according to revision directive obtains final voltage instruction.
With reference to shown in Fig. 2, described revision directive generation module 2 is by comparison module 4, multi-path choice module 5 and multiple
Ping-pang storage module is constituted, and ping-pang storage module described in this example has three, respectively the first ping-pang storage module 6, second
Ping-pang storage module 7 and the 3rd ping-pang storage module 8, certainly, we are also dependent on being actually needed the ping-pang storage module
Quantity be set to two, four, five it is even more many.Wherein, comparison module 4 for will input DC voltage difference with than
It is compared and exports the startup order of ping-pang storage module compared with the threshold value of inside modules setting.Multi-path choice module 5 is used for
According to the corresponding ping-pang storage module of startup command selection of the ping-pang storage module of the output of the comparison module 4.Described first
Ping-pang storage module 6, the second ping-pang storage module 7 and the 3rd ping-pang storage module 8 are for defeated according to the multi-path choice module 5
The ping-pang storage module select signal that goes out and start, and finally produce revision directive.
Refer again to shown in Fig. 1 and Fig. 2, a kind of chain type STATCOM DC voltage balance control method based on ping-pang storage,
Namely it is as follows come the method for controlling chain type STATCOM DC voltage using above-mentioned this control system：
A. DC voltage asks difference module 1 to seek the direct voltage reference value of the actual DC voltage of power model and setting
Difference.
B. revision directive generation module 2 is asked the DC voltage difference that difference module 1 is obtained to generate according to the DC voltage and is repaiied
Positive order.
Step b is specially：The DC voltage difference of input and the threshold value of inner setting are compared by comparison module 4
And export the startup order of ping-pang storage module, the ping-pang storage that the multi-path choice module 5 is exported according to the comparison module 4
The corresponding ping-pang storage module of startup command selection of module, the first ping-pang storage module 6, the second ping-pang storage module 7
The ping-pang storage module select signal that exported according to the multi-path choice module 5 with the 3rd ping-pang storage module 8 and select a startup
(so-called " selecting a startup " only starts the first ping-pang storage module 6, the second ping-pang storage module 7 and the 3rd ping-pang storage module
One in 8), and finally produce revision directive.
It is more clearly understood from for the ease of reader that described above " multi-path choice module 5 is defeated according to the comparison module 4
The corresponding ping-pang storage module of startup command selection of the ping-pang storage module for going out ", now explains to which：In comparison module 4
Portion sets three threshold Ts h1, Th2 and Th3, when DC voltage difference is more than Th1 and is less than or equal to Th2, starts the first table tennis
Pang control module 6.When DC voltage difference is more than Th2 and is less than or equal to Th3, start the second ping-pang storage module 7.Work as direct current
When voltage difference is more than Th3, start the 3rd ping-pang storage module 8.When DC voltage difference is less than Th1, voltage difference very little,
Then voltage need not be modified, not produce revision directive.
C. voltage instruction computing module 3 receives the revision directive of 2 output of revision directive generation module and the electricity of outside input
Pressure instruction, and final voltage instruction is obtained come the size for changing voltage instruction with according to revision directive.
Certainly, above-described embodiment technology design only to illustrate the invention and feature, its object is to make people much of that
Solution present disclosure is simultaneously implemented according to this, can not be limited the scope of the invention with this.It is all according to major technique of the present invention
Equivalent transformation or modification that the spirit of scheme is done, should all be included within the scope of the present invention.
Claims (4)
1. a kind of chain type STATCOM DC voltage balance control system, it is characterised in that the system includes：
DC voltage seeks difference module (1), for the direct voltage reference value of the actual DC voltage of power model and setting is asked
Difference；
Revision directive generation module (2), for asking the DC voltage difference that difference module (1) is obtained to generate according to the DC voltage
Revision directive；
Voltage instruction computing module (3), for receiving revision directive that revision directive generation module (2) exports and outside input
Voltage instruction, and according to revision directive changing the size of voltage instruction to obtain final voltage instruction；
The revision directive generation module (2) is by comparison module (4), multi-path choice module (5), and at least two ping-pang storages
Module is constituted, wherein,
The comparison module (4) is compared and exports table tennis for the threshold value by the DC voltage difference of input with inner setting
The startup order of pang control module；
The startup order choosing of ping-pang storage module of the multi-path choice module (5) for being exported according to the comparison module (4)
Select corresponding ping-pang storage module；
Each described ping-pang storage module is for the ping-pang storage module select signal that exported according to the multi-path choice module (5)
And a startup is selected, and finally produce revision directive.
2. chain type STATCOM DC voltage balance control system according to claim 1, it is characterised in that：The table tennis
Control module has three, respectively the first ping-pang storage module (6), the second ping-pang storage module (7) and the 3rd ping-pang storage
Module (8).
3. come the method that controls chain type STATCOM DC voltage, its feature exists the control system described in a kind of utilization claim 1
In：
A. DC voltage asks difference module (1) that the direct voltage reference value of the actual DC voltage of power model and setting is asked poor；
B. revision directive generation module (2) is asked the DC voltage difference that difference module (1) is obtained to generate according to the DC voltage and is repaiied
Positive order；
C. voltage instruction computing module (3) reception revision directive generation module (2) is exported revision directive and the electricity of outside input
Pressure instruction, and according to revision directive changing the size of voltage instruction to obtain final voltage instruction；
In step b, the revision directive generation module (2) is by comparison module (4), multi-path choice module (5), Yi Jizhi
Few two ping-pang storage modules composition, wherein, the comparison module (4) is by the door of the DC voltage difference being input into and inner setting
Limit value is compared and exports the startup order of ping-pang storage module, and the multi-path choice module (5) is according to the comparison module
(4) the corresponding ping-pang storage module of startup command selection of the ping-pang storage module for exporting, each described ping-pang storage module root
The ping-pang storage module select signal that exports according to the multi-path choice module (5) and select a startup, and finally produce revision directive.
4. method according to claim 3, it is characterised in that：The ping-pang storage module has three, and respectively first
Ping-pang storage module (6), the second ping-pang storage module (7) and the 3rd ping-pang storage module (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410767433.XA CN104466985B (en) | 2014-12-12 | 2014-12-12 | Chain type STATCOM DC voltage balance control system and control method |
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|---|---|---|---|
| CN201410767433.XA CN104466985B (en) | 2014-12-12 | 2014-12-12 | Chain type STATCOM DC voltage balance control system and control method |
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| CN104466985A CN104466985A (en) | 2015-03-25 |
| CN104466985B true CN104466985B (en) | 2017-03-29 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7230837B1 (en) * | 2006-03-27 | 2007-06-12 | North Carolina State University | Method and circuit for cascaded pulse width modulation |
| CN102624006A (en) * | 2012-03-29 | 2012-08-01 | 湖南大学 | Control method for single-phase cascade type static synchronous compensator |
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2014
- 2014-12-12 CN CN201410767433.XA patent/CN104466985B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7230837B1 (en) * | 2006-03-27 | 2007-06-12 | North Carolina State University | Method and circuit for cascaded pulse width modulation |
| CN102624006A (en) * | 2012-03-29 | 2012-08-01 | 湖南大学 | Control method for single-phase cascade type static synchronous compensator |
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| CN104466985A (en) | 2015-03-25 |
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