CN107785897A - A kind of New Active wave filter fault diagnosis and fault-tolerant control improvement strategy - Google Patents
A kind of New Active wave filter fault diagnosis and fault-tolerant control improvement strategy Download PDFInfo
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- CN107785897A CN107785897A CN201610714044.XA CN201610714044A CN107785897A CN 107785897 A CN107785897 A CN 107785897A CN 201610714044 A CN201610714044 A CN 201610714044A CN 107785897 A CN107785897 A CN 107785897A
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- fault
- tolerant
- control
- wave filter
- new active
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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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
-
- 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
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention discloses a kind of New Active wave filter fault diagnosis and fault-tolerant control improvement strategy, it is characterized in that the method for diagnosing faults is to use hybrid model method, faults-tolerant control strategy uses the source current tracking of voltage feedforward control, overcome split capacitor and cause influence of the direct current mid-point potential offset to system, improve the control accuracy of system, impact of the fault-tolerant switching to system is avoided, while good compensation effect is ensured, improves the reliability of system.Using the New Active wave filter fault diagnosis and fault-tolerant control improvement strategy, can quick failure judgement position, facilitate system maintenance failure.The source current tracing compensation strategy proposed with reference to Fault-Tolerant Topology switching, not only ensure that compensation effect, and be easy to the realization of fault-tolerant switching.Voltage feedforward control inhibits direct current midpoint potential uneven, makes system balance effect under fault-tolerant state more stable.
Description
Technical field
The invention belongs to fault diagnosis and fault-tolerant control field, more particularly to one kind being capable of fast reaction fault type and event
Hinder the New Active wave filter fault diagnosis and fault-tolerant control improvement strategy of the hybrid model method of position.
Background technology
Parallel connection type active electric filter (Shunt Active Power Filter, SAPF) is a kind of new harmonic suppression
System, reactive-load compensation power electronic equipment.SAPF core component is inverter, but because the frequency of switch is higher, and
Power device works long hours in high temperature, high frequency state, is flimsy device, once breaking down, SAPF whole systems are all
Cisco unity malfunction, catastrophic consequence is possibly even caused when serious.
In recent years with the continuous development of inverter, there are many SAPF faults-tolerant control plans with good result
Slightly, but wherein also there is weak point：Although most fault-tolerant strategy can realize the operation of faults-tolerant control, can not differentiate is
Short circuit or open fault, and failure detection time is longer, actual effect unobvious；Nearest novel fault diagnostic method is very real
With, but the unbalanced influence of direct current midpoint potential is not accounted in its faults-tolerant control strategy so that SAPF compensation effect
Fruit substantially reduces.
The content of the invention
The present invention is devised and a kind of is capable of mixing for fast reaction fault type and abort situation aiming above mentioned problem
The New Active wave filter fault diagnosis and fault-tolerant control improvement strategy of systematic model method, its method for diagnosing faults are to use to mix
System model method, by the detection to system power state residual characteristic value, it can that accurately and quickly judge SAPF's
Fault type and abort situation, the time is saved for SAPF maintenance；Faults-tolerant control strategy uses the power supply of voltage feedforward control
Current tracking method, overcome split capacitor and cause influence of the direct current mid-point potential offset to system, improve the control of system
Precision, impact of the fault-tolerant switching to system is avoided, while good compensation effect is ensured, improves the reliable of system
Property.The technical solution adopted by the present invention is a kind of New Active wave filter fault diagnosis and fault-tolerant control improvement strategy, including therefore
Hinder diagnosis, source current tracing compensation method, error-tolerance type SAPF control strategies.Described fault diagnosis method, it is in SAPF
Each phase bridge arm of inverter be all implanted into molten F soon, if short trouble occurs, fusing turns short trouble to molten F rapidly soon
Turn to open fault, thus can cut-offfing to determine short trouble or open fault by fuse, facilitate system maintenance.
Described source current tracing compensation method, the direct tracing of SAPF mains side electricity that the design uses, control
Electric power outputting current is consistent with mains voltage waveform.This tracking compensation technique is less to hardware requirement, realizes more convenient letter
It is single, while source current tracking simply changes source current instruction during fault-tolerant, can more be reliably completed
Fault-tolerant switching, avoid impact of the fault-tolerant switching to system hardware.
Described error-tolerance type SAPF control strategies, Current Control Strategy use displacement current tracking mode, and this method is not
But three-phase four can be switched to four current sensors needed for SAPF load harmonic current side and be reduced to two, but also can
Simplify and calculate, reduce requirement on devices, implementation method is simple.
The invention has the advantages that the New Active wave filter fault diagnosis and fault-tolerant control improvement strategy, can be fast
Fast failure judgement position, facilitates system maintenance failure.The source current tracing compensation strategy proposed with reference to Fault-Tolerant Topology switching, no
But compensation effect is ensure that, and is easy to the realization of fault-tolerant switching.Voltage feedforward control inhibits direct current midpoint potential uneven,
Make system balance effect under fault-tolerant state more stable.
Brief description of the drawings
The present invention will be further described with reference to the accompanying drawings and detailed description.The scope of the present invention not only limits to
In the statement of herein below.Fig. 1 is schematic block circuit diagram of the present invention.
Embodiment
As illustrated, the New Active wave filter fault diagnosis and fault-tolerant control improvement strategy of the present invention, including failure are examined
Disconnected method, source current tracing compensation method, error-tolerance type SAPF control strategies.
Described fault diagnosis method, it is that each phase bridge arm of inverter in SAPF is all implanted into molten F soon, if short-circuit
Failure occurs, and molten F fuses rapidly soon is converted into open fault short trouble, thus can cut-offfing to determine by fuse
Short trouble or open fault.Using the open circuit diagnostic method based on current status residual error, in SAPF open faults,
All 512 kinds of possible fault vectors identification to each cycle is just not required to, need to only carry out above judgement to electric current residual error, you can
Fault type is determined, and then improves the rapidity of fault detect.
Described source current tracing compensation method, the direct tracing of SAPF mains side electricity that the design uses, control
Electric power outputting current is consistent with mains voltage waveform.Source current reference amplitude is produced in outer voltage first (to be used to remain straight
It is stable to flow side bus), and line voltage is tracked by three-phase software PLL phaselocked loops, obtain supply voltage sync waveform, Liang Zhexiang
Multiply as SAPF current references, then using source current as feedback, adjusted through closed loop, PWM switches are implemented to SAPF converters
Modulation, make the reference value of source current tracking setting, so as to consistent with mains voltage waveform, and then the mesh of harmonic carcellation
's.
Described error-tolerance type SAPF control strategies, Current Control Strategy use displacement current tracking mode, specific compensation
Strategy is added the 1/3 of capacitance voltage deviation in current reference value and is used as feedforward can compensating electric capacity by capacitance voltage deviation
Instantaneous voltage difference, so as to suppress direct current mid-point potential offset.This method can not only switch three-phase four the negative of SAPF
Carry four current sensors needed for harmonic current side and be reduced to two, but also calculating can be simplified, reduce requirement on devices, realize
Method is simple.
Above with respect to the present invention specific descriptions, without limitation, it will be understood by those within the art that, still
The present invention can be modified or equivalent substitution, to reach identical technique effect；As long as satisfaction uses needs, all in this hair
Within bright protection domain.
Claims (4)
1. a kind of New Active wave filter fault diagnosis and fault-tolerant control improvement strategy, including fault diagnosis method, source current with
Track penalty method, error-tolerance type SAPF control strategies, it is characterised in that the method for diagnosing faults is to use hybrid model method,
Faults-tolerant control strategy uses the source current tracking of voltage feedforward control.
2. New Active wave filter fault diagnosis and fault-tolerant control improvement strategy according to claim 1, its feature exist
It is that each phase bridge arm of inverter in SAPF is all implanted into molten F soon, if short trouble is sent out in, described fault diagnosis method
Raw, molten F fuses rapidly soon is converted into open fault short trouble, thus can cut-offfing to determine short-circuit event by fuse
Barrier or open fault, facilitate system maintenance.
3. New Active wave filter fault diagnosis and fault-tolerant control improvement strategy according to claim 1, its feature exist
It is defeated in the direct tracing of SAPF mains side electricity that, described source current tracing compensation method, the design use, control power supply
It is consistent with mains voltage waveform to go out electric current, this tracking compensation technique is less to hardware requirement, realize it is more convenient simple, simultaneously
Source current tracking simply changes source current instruction during fault-tolerant, can more be reliably completed fault-tolerant cut
Change, avoid impact of the fault-tolerant switching to system hardware.
4. New Active wave filter fault diagnosis and fault-tolerant control improvement strategy according to claim 1, its feature exist
In described error-tolerance type SAPF control strategies, Current Control Strategy uses displacement current tracking mode, and this method not only may be used
Two are reduced to so that three-phase four to be switched to four current sensors needed for SAPF load harmonic current side, but also can be simplified
Calculate, reduce requirement on devices, implementation method is simple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610714044.XA CN107785897A (en) | 2016-08-24 | 2016-08-24 | A kind of New Active wave filter fault diagnosis and fault-tolerant control improvement strategy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610714044.XA CN107785897A (en) | 2016-08-24 | 2016-08-24 | A kind of New Active wave filter fault diagnosis and fault-tolerant control improvement strategy |
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| Publication Number | Publication Date |
|---|---|
| CN107785897A true CN107785897A (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610714044.XA Pending CN107785897A (en) | 2016-08-24 | 2016-08-24 | A kind of New Active wave filter fault diagnosis and fault-tolerant control improvement strategy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803484A (en) * | 2021-02-26 | 2021-05-14 | 上海海事大学 | Mean-value current compensation model-based multi-level grid-connected inverter fault-tolerant control method |
| CN113746108A (en) * | 2021-08-12 | 2021-12-03 | 电子科技大学 | T-type three-level SAPF open circuit fault sequence model prediction fault-tolerant control method |
-
2016
- 2016-08-24 CN CN201610714044.XA patent/CN107785897A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803484A (en) * | 2021-02-26 | 2021-05-14 | 上海海事大学 | Mean-value current compensation model-based multi-level grid-connected inverter fault-tolerant control method |
| CN112803484B (en) * | 2021-02-26 | 2023-08-11 | 上海海事大学 | Multi-level grid-connected inverter fault-tolerant control method based on mean current compensation model |
| CN113746108A (en) * | 2021-08-12 | 2021-12-03 | 电子科技大学 | T-type three-level SAPF open circuit fault sequence model prediction fault-tolerant control method |
| CN113746108B (en) * | 2021-08-12 | 2023-05-09 | 电子科技大学 | T-type three-level SAPF open circuit fault sequence model prediction fault tolerance control method |
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Application publication date: 20180309 |
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| WD01 | Invention patent application deemed withdrawn after publication |