CN106451428A - Hybrid type unified power quality conditioner with short circuiting current limiting function - Google Patents
Hybrid type unified power quality conditioner with short circuiting current limiting function Download PDFInfo
- Publication number
- CN106451428A CN106451428A CN201610907200.4A CN201610907200A CN106451428A CN 106451428 A CN106451428 A CN 106451428A CN 201610907200 A CN201610907200 A CN 201610907200A CN 106451428 A CN106451428 A CN 106451428A
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- Prior art keywords
- phase
- short
- current
- limiting function
- circuit current
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a hybrid type unified power quality conditioner with a short circuiting current limiting function. The single control on one phase cannot be realized by the three-phase and three-wire or three-phase and four-wire type unified power quality conditioner. The hybrid type unified power quality conditioner comprises a parallel current converter, three single-phase H bridge inverters with short circuiting current limiting functions, and a three-phase serial transformer, wherein the direct current sides of the three single-phase H bridge inverters with the short circuiting current limiting functions are connected with a direct current bus of the parallel current converter in parallel, and the alternating current sides of the three single-phase H bridge inverters with short circuiting current limiting functions are respectively connected with a secondary side of the three-phase serial transformer; each single-phase H bridge inverter with the short circuiting current limiting function is formed by serially connecting an H bridge inverter and the alternating current side of an H bridge current limiter, and the direct current side of each H bridge current limiter comprises a short circuiting current releasing circuit. The hybrid type unified power quality conditioner has the advantages that the three-phase independent control of the serial side is realized, and the zero-sequence component can be outputted; when the single-phase or two-phase short circuiting fault occurs, the non-fault phase can continue to run, and the exiting of the whole conditioner is not needed.
Description
Technical field
The invention belongs to power quality controlling device field, specifically a kind of mixed type with short-circuit current-limiting function
Research on Unified Power Quality Conditioner.
Background technology
Research on Unified Power Quality Conditioner（Unified power quality conditioner, UPQC）Combine active
Electric-power filter（Active power filter, APF）And dynamic electric voltage recovery device（dynamic voltage
Restorers, DVR）Function, series compensating function and shunt compensation function are combined by it, can solve the problem that voltage jump, voltage
Fluctuation and flickering, short time voltage disruption, improve Voltage unbalance harmonic level, are a kind of preferable electric energy of combination property
Quality controlling device.
Research to UPQC is concentrated mainly on three-phase three-line system at present, due to not having zero sequence path it is impossible to export zero
Order components, limit it and compensate the application in the fields such as harmonic compensation in Voltage unbalance.For solving this problem, occur in that one
Plant using the three-phase four-wire system UPQC drawing DC side midpoint three bridge arm structure, but its control strategy is complex, and three-phase is not
Enable full decoupled.And no matter three-phase three-wire system UPQC or three-phase four-wire system UPQC is it is impossible to realize independent to a certain phase
Control；Additionally, remaining two-phase all cannot work on when AC occurs single-phase earthing fault, whole UPQC device is led to move back
Go out to run.
Importantly, with other tandem type flexible AC transmission equipments（flexible AC transmission
System, FACTS）Equally, due to concatenation in the line, when load-side is short-circuited, system short-circuit electric current can all flow
Cross the part in series of device, this is fatal for the relatively low power electronic devices of overload capacity, will certainly cause UPQC
The damage of series connection transverter, which also limits the UPQC or even all tandem type FACTS devices application in power system.
Content of the invention
The defect existing for above-mentioned prior art, the present invention provides a kind of mixed type unification with short-circuit current-limiting function
Electric energy regulator, to realize series side three-phase independent control, can export zero-sequence component.
For this reason, the present invention adopts the following technical scheme that：A kind of mixed type with short-circuit current-limiting function unifies electric energy matter
Amount adjuster, comprises a parallel inverter, three single-phase H bridge type inverters with short-circuit current-limiting function and three-phase series and becomes
Depressor；
The described three single-phase H bridge type inverter direct-flow sides with short-circuit current-limiting function are connected in parallel inverter direct current mother
Line, AC is connected with three-phase series transformer secondary respectively；The described single-phase H bridge type inverter with short-circuit current-limiting function
It is composed in series with H bridge type current limiter AC by H bridge type inverter, its DC side contains a short circuit current release circuit.
Further, described H bridge type current limiter includes H bridge type rectifier and is connected across H bridge type rectifier DC side
Current-limiting inductance.
Further, described short circuit current release circuit comprises inverse conductivity type power device and current bypass pipe, wherein electricity
Stream shunt valve is connected in the DC side both positive and negative polarity of H bridge type inverter, and inverse conductivity type power device is connected in series in H bridge type inverter
Between DC side negative pole and DC capacitor negative pole.
Further, described inverse conductivity type power device is against conductivity type IGCT, inverse conductivity type GTO, inverse conductivity type IGBT or inverse
Conductivity type IGCT.
Further, described current bypass pipe is IGCT, GTO, IGBT or IGCT.
Further, described three-phase series transformer is three-phase five-limb transformer or three single-phase transformers.
Further, when load-side is short-circuited fault, there is the single-phase H bridge type inverter of short-circuit current-limiting function immediately
Switch to short circuit current limitation pattern, both can guarantee that the harm from short circuit current for the adjuster itself, can effectively limit system simultaneously again
Short circuit current level；When there is single-phase or two-phase short-circuit fault, non-faulting phase can continue to run with and need not entirely adjuster move back
Go out.
The invention has the advantages that：The adjuster of the present invention can realize series side three-phase independent control, can
Output zero-sequence component.When load-side is short-circuited fault, both can guarantee that the harm from short circuit current for the adjuster itself, simultaneously
System short-circuit levels of current can effectively be limited again.Additionally, when there is single-phase or two-phase short-circuit fault, non-faulting phase can continue
Run without whole adjuster to exit.
Brief description
Fig. 1 is the topology diagram of the present invention.
Fig. 2 is the topological structure sketch of the present invention.
Fig. 3 is the short-circuit current paths figure of the present invention.
Specific embodiment
Describe the specific embodiment of the present invention below in conjunction with drawings and Examples in detail, but the present invention is not subject to described enforcement
Example is limited.
It can be seen from figure 1 that the mixed type Research on Unified Power Quality Conditioner that the present invention has short-circuit current-limiting function comprises one
Parallel inverter, three single-phase H bridge type inverters with short-circuit current-limiting function and three-phase series transformer, have short circuit current limitation
As shown in Fig. 2 dotted line frame, its DC side parallel is connected to parallel inverter dc bus to the single-phase H bridge type inverter of function, hands over
Stream side is connected with three-phase series transformer secondary respectively.The single-phase H bridge type inverter with short-circuit current-limiting function is by H bridge type inversion
Device is composed in series with H bridge type current limiter AC, and its DC side contains a short circuit current release circuit.
In Fig. 2,U sa、U sb、U scFor system sending end three-phase voltage；CFor DC capacitor,U dcFor DC capacitor voltage；L 1、L 2
It is respectively side in parallel and series side filter inductance；L dFor current-limiting inductance；M, n are dc bus anode and cathode terminals；x1、y1, x2、y2,
x3、y3It is respectively six terminals of three-phase series transformer；D1、D4For the fly-wheel diode of IGBT in H bridge type inverter, T1、T2
For the rectification IGCT of H bridge type current limiter, D5、D6Commutation diode for H bridge type current limiter and continued flow tube；Gp、Dp、TpConstitute short
Road current discharge circuit, wherein Gp、DpConstitute inverse conductivity type power device, TpFor current bypass pipe.In Fig. 1 and Fig. 3 symbol all with figure
Identical in 2.I=1 in Fig. 2,2,3.
G in short circuit current release circuitpAnd TpCan be IGCT, GTO, IGBT, IGCT etc..
Operation principle is as follows：
（1）Operation principle during normal operation
As shown in Fig. 2 when normally running, three single-phase H bridge type inverters with short-circuit current-limiting function（I.e. dotted line frame）In H
Bridge type current limiter T1、T2Full triggering and conducting, G in short circuit current release circuitpTriggering and conducting, TpTurn off, there is short-circuit current-limiting function
Single-phase H bridge type inverter direct-flow side be connected with parallel inverter dc bus.After of short duration charging process, current limliting electricity
Inducing current reaches the peak value of load current, and subsequent H bridge type current limiter enters steady-state operating condition.Due to continued flow tube D5、D6Afterflow
Effect, the AC of H bridge type inverter is equivalent to short circuit state, have the single-phase H bridge type inverter of short-circuit current-limiting function with general
Logical H bridge type inverter is fully equivalent.
（2）There is operation principle during single-phase earthing fault in load-side
Taking A phase as a example it is assumed that load-side A phase occurs ground short circuit fault, and occur at A phase peak forward voltage（Now short
Road fault most serious）, as shown in Figure 3.Now A phase short circuit current all flows to A phase tool by the coupling of series transformer
There is the single-phase H bridge type inverter of short-circuit current-limiting function.After controller detects A phase earth fault, block H bridge type inverter immediately
IGBT trigger pulse, H bridge type current limiter T1、T2Trigger pulse and the G of short circuit current release circuitpTrigger pulse, triggers T simultaneouslyp
Conducting, the switching speed due to IGCT is less than IGBT, so TpConducting is in GpHave no progeny in pass it is therefore prevented that dc bus short circuit leads to
DC capacitor discharges and then affects other two-phase operations.TpAfter conducting, due to the clamping action of DC capacitor, DpTurn off, now short
The circulation path of road electric current as shown in thick line in Fig. 3, because the ascendant trend of current-limiting inductance electric current leads to continued flow tube to bear back-pressure
And turn off, short circuit current flows into from x1 terminal, by D1、Tp、D4、D5、Ld、T2, flow out from y1 terminal, current-limiting inductance LdUndertake limit
Stream acts on.After short circuit current reaches peak value, current-limiting inductance voltage starts reversely, and current-limiting inductance electric current passes through D5、D6Afterflow, H bridge type
Current limiter exchange side terminal is equivalent to open circuit, 1 cycle（20ms）The short circuit current inside flowing through device is thoroughly cut off, and is now
System side by A be in series transformer saturation excitation reactance continue current limliting.A phase has the single-phase H bridge type inverter of short-circuit current-limiting function
After exiting, B, C two-phase then continues to run with unaffected.
（3）There is operation principle when two-phase or three phase short circuit fault in load-side
When system load side occurs two-phase or three phase short circuit fault, its operation principle is identical with during generation single-phase earthing fault, with
When block fault phase H bridge type inverter IGBT trigger pulse, H bridge type current limiter T1、T2Trigger pulse and short circuit current release circuit
GpTrigger pulse simultaneously triggers TpConducting, a cycle（20ms）Interior, the single-phase H bridge type that fault phase has short-circuit current-limiting function is inverse
Become device out of service, the simultaneous faults transformer saturation excitation reactance that is in series continues to limit system short-circuit electric current, and non-faulting phase
Then can work on（During two-phase short-circuit fault）.
Claims (7)
1. a kind of mixed type Research on Unified Power Quality Conditioner with short-circuit current-limiting function, comprise a parallel inverter, three
There is single-phase H bridge type inverter and the three-phase series transformer of short-circuit current-limiting function；
The described three single-phase H bridge type inverter direct-flow sides with short-circuit current-limiting function are connected in parallel inverter direct current mother
Line, AC is connected with three-phase series transformer secondary respectively；The described single-phase H bridge type inverter with short-circuit current-limiting function by
H bridge type inverter is composed in series with H bridge type current limiter AC, and its DC side contains a short circuit current release circuit.
2. the mixed type Research on Unified Power Quality Conditioner with short-circuit current-limiting function according to claim 1, its feature exists
In described H bridge type current limiter includes H bridge type rectifier and the current-limiting inductance being connected across H bridge type rectifier DC side.
3. the mixed type Research on Unified Power Quality Conditioner with short-circuit current-limiting function according to claim 1 and 2, its feature
It is, described short circuit current release circuit comprises inverse conductivity type power device and current bypass pipe, wherein current bypass pipe is in parallel
Be connected to the DC side both positive and negative polarity of H bridge type inverter, inverse conductivity type power device be connected in series in the DC side negative pole of H bridge type inverter with
Between DC capacitor negative pole.
4. the mixed type Research on Unified Power Quality Conditioner with short-circuit current-limiting function according to claim 3, its feature exists
In described inverse conductivity type power device is against conductivity type IGCT, inverse conductivity type GTO, inverse conductivity type IGBT or inverse conductivity type IGCT.
5. the mixed type Research on Unified Power Quality Conditioner with short-circuit current-limiting function according to claim 3, its feature exists
In described current bypass pipe is IGCT, GTO, IGBT or IGCT.
6. the mixed type Research on Unified Power Quality Conditioner with short-circuit current-limiting function according to claim 1, its feature exists
In described three-phase series transformer is three-phase five-limb transformer or three single-phase transformers.
7. the mixed type Research on Unified Power Quality Conditioner with short-circuit current-limiting function according to claim 1, its feature exists
In when load-side is short-circuited fault, the single-phase H bridge type inverter with short-circuit current-limiting function switches to short circuit current limitation immediately
Pattern, both can guarantee that the harm from short circuit current for the adjuster itself, can effectively limit system short-circuit levels of current simultaneously again；?
When there is single-phase or two-phase short-circuit fault, non-faulting phase can continue to run with and need not entirely exit adjuster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610907200.4A CN106451428B (en) | 2016-10-18 | 2016-10-18 | A kind of mixed type Research on Unified Power Quality Conditioner with short-circuit current-limiting function |
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| CN201610907200.4A CN106451428B (en) | 2016-10-18 | 2016-10-18 | A kind of mixed type Research on Unified Power Quality Conditioner with short-circuit current-limiting function |
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| CN106451428A true CN106451428A (en) | 2017-02-22 |
| CN106451428B CN106451428B (en) | 2019-07-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469980A (en) * | 2015-08-19 | 2017-03-01 | 富士电机株式会社 | DC-to-dc conversion equipment |
| CN107070251A (en) * | 2017-03-14 | 2017-08-18 | 珠海万力达电气自动化有限公司 | A kind of railway power line cleaner cooperative control system and method |
| CN107611992A (en) * | 2017-11-10 | 2018-01-19 | 贵州电网有限责任公司电力科学研究院 | A kind of three phase separation formula hybrid power electronic transformer and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051670Y (en) * | 2007-04-19 | 2008-04-23 | 浙江大学 | Integrated tide controller with short circuit current limit function |
| US20140362618A1 (en) * | 2011-02-03 | 2014-12-11 | Alstom Technology Ltd. | Power electronic converter |
| CN104600707A (en) * | 2015-01-12 | 2015-05-06 | 国家电网公司 | Current limiting type UPFC system design method |
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2016
- 2016-10-18 CN CN201610907200.4A patent/CN106451428B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051670Y (en) * | 2007-04-19 | 2008-04-23 | 浙江大学 | Integrated tide controller with short circuit current limit function |
| US20140362618A1 (en) * | 2011-02-03 | 2014-12-11 | Alstom Technology Ltd. | Power electronic converter |
| CN104600707A (en) * | 2015-01-12 | 2015-05-06 | 国家电网公司 | Current limiting type UPFC system design method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469980A (en) * | 2015-08-19 | 2017-03-01 | 富士电机株式会社 | DC-to-dc conversion equipment |
| CN107070251A (en) * | 2017-03-14 | 2017-08-18 | 珠海万力达电气自动化有限公司 | A kind of railway power line cleaner cooperative control system and method |
| CN107070251B (en) * | 2017-03-14 | 2019-06-14 | 珠海万力达电气自动化有限公司 | A kind of cooperative control system and method for railway power line cleaner |
| CN107611992A (en) * | 2017-11-10 | 2018-01-19 | 贵州电网有限责任公司电力科学研究院 | A kind of three phase separation formula hybrid power electronic transformer and its control method |
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| Publication number | Publication date |
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| CN106451428B (en) | 2019-07-23 |
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