CN203933044U - A kind of feed-forward type voltage based on wind-powered electricity generation falls surge compensation arrangement - Google Patents
A kind of feed-forward type voltage based on wind-powered electricity generation falls surge compensation arrangement Download PDFInfo
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- CN203933044U CN203933044U CN201420353407.8U CN201420353407U CN203933044U CN 203933044 U CN203933044 U CN 203933044U CN 201420353407 U CN201420353407 U CN 201420353407U CN 203933044 U CN203933044 U CN 203933044U
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model discloses a kind of feed-forward type voltage based on wind-powered electricity generation and fall surge compensation arrangement, it comprises: wind-driven generator; Rectification unit; H bridge inversion unit; Transformer; Combining inverter; Direct current chopper unit; Direct current detection device; DC voltage detecting device; Alternating voltage checkout gear; Controller, it is connected with described direct current detection device, DC voltage detecting device, rectification unit and wind-driven generator respectively, described controller judges the operating state of electrical network according to the ac voltage of alternating voltage checkout gear transmission, to control H bridge inversion unit output AC voltage, line voltage is fallen or surge compensates, described controller is also controlled combining inverter and is injected electric energy to electrical network, and controls direct current chopper unit release electric energy.
Description
Technical field
The utility model relates to a kind of voltage compensating device, relates in particular to a kind of voltage compensating device based on wind-powered electricity generation.
Background technology
Developed country is very high to the requirement of quality of power supply level, power quality problem not only can bring very large economic loss to industrial quarters, cause production cost to increase as stopped work and restarting, the damage equipment that is quick on the draw, scrap semi-finished product, reduce product quality, cause marketing difficulty and infringement corporate image and and user's good commercial relations etc., and bring harm can to the equipment of the important electricity consumption departments such as medical treatment, cause serious production and interruption of service.EPRI-Electric Power Research Institute (EPRI) studies show that, power quality problem causes American industry in data every year, and the loss in material and productivity reaches 30,000,000,000 dollars (Electric PowerResearch Institute, 1999); The developed countries such as Japan require also very high to the quality of power supply.Along with developing rapidly of China's high-technology industry, requirement to quality of power supply level is more and more higher, voltage falls, surge is subject matter wherein, although voltage falls, the surge duration is short, but it can cause interruption or the shut-down of industrial process, and cause industrial process downtime be far longer than of accident itself time, the loss that therefore caused is very large.
Traditional method, as voltage regulator can not address these problems, though and uninterrupted power supply UPS device can address these problems, but its cost and operating cost are all extremely expensive.In order to address the above problem, dynamic voltage compensator is carried out to research both at home and abroad.Than UPS, dynamic voltage compensator can effectively solve the problem that voltage is subside, and still, energy storage problem is perplexing the research of dynamic voltage compensator always, although someone proposes the advanced methods such as least energy injection method, extra energy storage affects all the time it and further promotes, develops.
Utility model content
The purpose of this utility model is to provide a kind of feed-forward type voltage based on wind-powered electricity generation and falls surge compensation arrangement, and it utilizes wind power generation to fall surge to the voltage in electrical network and compensates, thereby guarantees that load voltage does not change, and then has protected load; Meanwhile, this device can utilize wind power generation to supply with for electrical network electric energy provides to supplement, thereby does not need to arrange extra energy-storage travelling wave tube.
In order to achieve the above object, the utility model provides a kind of feed-forward type voltage based on wind-powered electricity generation to fall surge compensation arrangement, and it comprises:
Wind-driven generator, it is alternating current output by wind power transformation;
Rectification unit, its ac input end is connected with the output of described wind-driven generator, and the alternating current of wind-driven generator output output is converted to direct current output;
H bridge inversion unit, its DC bus is connected with the DC output end of described rectification unit;
Transformer, its primary coil is connected with the output of described H bridge inversion unit, and the secondary coil of transformer is used for being serially connected in electrical network;
Combining inverter, its DC bus is connected with the DC output end of described rectification unit, and the output of combining inverter is for being connected with electrical network;
Direct current chopper unit, its DC bus is connected with the DC output end of described rectification unit;
Direct current detection device, it is connected with the DC output end of rectification unit, to detect the electric current of rectification unit output;
DC voltage detecting device, it is connected with the DC output end of rectification unit, to detect the voltage of rectification unit output;
Alternating voltage checkout gear, it is in order to be connected with electrical network, with the voltage of detection of grid;
Controller, it is connected with described direct current detection device, DC voltage detecting device, rectification unit and wind-driven generator respectively, described controller receives DC current values and the DC voltage value of direct current detection device and DC voltage detecting device transmission, regulates the rotating speed of wind-driven generator so that rectification unit is carried out to maximal power tracing control; Described controller is also connected with alternating voltage checkout gear, H bridge inversion unit, combining inverter and direct current chopper unit, described controller judges the operating state of electrical network according to the ac voltage of alternating voltage checkout gear transmission, to control H bridge inversion unit output AC voltage, line voltage is fallen or surge compensates, described controller is also controlled combining inverter and is injected electric energy to electrical network, and controls direct current chopper unit release electric energy.
Feed-forward type voltage based on wind-powered electricity generation described in the utility model falls in surge compensation arrangement, and described controller can be electronic device or the smart machines such as digital signal processor, single-chip microcomputer, computer; Whether the described operating state that judges electrical network comprises that whether detection of grid voltage U s is normal, as having voltage to fall or surge.The electric energy that device described in the utility model produces wind-driven generator is controlled distribution; Controller is exported the operating state that judges electrical network according to alternating voltage checkout gear; Judge that, when the operating state of electrical network is normal, the electric energy that controller control wind-driven generator produces injects to electrical network by combining inverter; Judge when electrical network generation voltage falls, control the electric energy of wind-driven generator generation by H bridge inversion unit and the transformer corresponding bucking voltage amount of output fast, the voltage of load end is remained unchanged, thereby protected load, the electric energy of simultaneously controlling wind-driven generator generation injects to electrical network by combining inverter; While judging electrical network generation voltage surge, control the electric energy of wind-driven generator generation by H bridge inversion unit and the transformer corresponding bucking voltage amount of output fast, the voltage of load end is remained unchanged, thereby protect load, utilize direct current Chopper unit to discharge the unnecessary energy of DC bus simultaneously, maintain the stable of DC bus-bar voltage; Described DC bus is the DC bus of H bridge inversion unit, combining inverter and direct current chopper unit simultaneously.
Device described in the utility model has utilized the wind energy of environmental protection, having solved line voltage falls and compensation and the energy storage problem of surge, in addition the combining inverter in device is taked feed-forward mode, thereby does not increase the overhead provision of transformer and H bridge inversion unit.
Further, fall in surge compensation arrangement at the above-mentioned feed-forward type voltage based on wind-powered electricity generation, described controller comprises digital signal processor.
Further, fall in surge compensation arrangement at the above-mentioned feed-forward type voltage based on wind-powered electricity generation, described controller comprises single-chip microcomputer.
Further, fall in surge compensation arrangement at the above-mentioned feed-forward type voltage based on wind-powered electricity generation, described controller comprises computer.
Further, fall in surge compensation arrangement at the above-mentioned feed-forward type voltage based on wind-powered electricity generation, described direct current detection device comprises DC current sensor.
Further, fall in surge compensation arrangement at the above-mentioned feed-forward type voltage based on wind-powered electricity generation, described DC voltage detecting device comprises direct current voltage sensor.
Further, fall in surge compensation arrangement at the above-mentioned feed-forward type voltage based on wind-powered electricity generation, described alternating voltage checkout gear comprises AC voltage sensor.
The method that adopts the above-mentioned feed-forward type voltage based on wind-powered electricity generation to fall surge compensation arrangement to carry out voltage and fall surge compensation, it comprises step:
Adopting wind-driven generator is alternating current output by wind energy transformation;
Adopt rectification unit that the alternating current of wind-driven generator output is converted to galvanic current, and rectification unit is carried out to maximal power tracing control so that the direct current active power maximum of rectification unit output;
Adopt H bridge inversion unit and combining inverter to change the direct current of rectification unit output into alternating current;
Detection of grid voltage U
swhether normal: if be judged as YES, making controller control H bridge inversion unit is zero to the alternating voltage of electrical network output, and control whole electric energy injection electrical networks that combining inverter produces wind-driven generator; If be judged as NO, further judge that electrical network voltage has occurred and fallen or voltage surge has occurred: fall if be judged as voltage, control the alternating voltage U of H bridge inversion unit to electrical network output
j=U
s0-U
s, and control the remaining electric energy injection electrical network that combining inverter produces wind-driven generator; If be judged as voltage surge, control the alternating voltage U of H bridge inversion unit to electrical network output
j=U
s0-U
s, and control the unnecessary electric energy that direct current chopper unit release wind-driven generator produces, to maintain the stable of DC bus-bar voltage; Wherein U
s0for electrical network standard alternating supply voltage value.
The above-mentioned feed-forward type voltage based on wind-powered electricity generation falls surge compensation method and utilizes the feed-forward type voltage based on wind-powered electricity generation described in the utility model to fall the realization of surge compensation arrangement.Described DC bus is the DC bus of H bridge inversion unit, combining inverter and direct current chopper unit simultaneously; Line voltage Us detects by alternating voltage checkout gear.
The step of rectification unit being carried out to maximal power tracing control is: controller detects the active power of rectification unit output, judge whether the active power of this output is greater than the active power of output last time, if be judged as YES, increase the rotating speed of wind-driven generator, if be judged as NO, the rotating speed that maintains wind-driven generator is constant.
Can adopt respectively direct current detection device and DC voltage detecting device to detect the galvanic electric current I of rectification unit output
wand voltage U
w, to obtain the active-power P of rectification unit output
w=U
w× I
w.
Adopt the above-mentioned feed-forward type voltage based on wind-powered electricity generation to fall surge compensation arrangement and carry out voltage and fall surge when compensation, work as 90%U
s0≤ U
s≤ 110%U
s0, judge that line voltage Us is for normal; Work as U
s< 90%U
s0, be judged as voltage and fall; Work as U
s> 110%U
s0, be judged as voltage surge.
Feed-forward type voltage based on wind-powered electricity generation described in the utility model falls surge compensation arrangement, has the following advantages:
1) can effectively solve line voltage and fall and the compensation problem of surge, thus protection load;
2) adopt transformer mode, make to be suitable for voltage range wider;
3) effectively utilized the wind energy of environmental protection, energy-storage units can be additionally set;
4) combining inverter in device is taked feed-forward mode, thereby does not increase the overhead provision of transformer and H bridge inversion unit.
Brief description of the drawings
Fig. 1 is that the feed-forward type voltage based on wind-powered electricity generation described in the utility model falls the structural representation of surge compensation arrangement under a kind of execution mode.
Fig. 2 is the H bridge inversion unit topological diagram that the feed-forward type voltage based on wind-powered electricity generation described in the utility model falls surge compensation arrangement.
Fig. 3 is the combining inverter topological diagram that the feed-forward type voltage based on wind-powered electricity generation described in the utility model falls surge compensation arrangement.
Fig. 4 is the flow chart that adopts the feed-forward type voltage based on wind-powered electricity generation described in the utility model to fall surge compensation arrangement to carry out voltage and fall surge compensation.
Embodiment
Be described further the feed-forward type voltage based on wind-powered electricity generation described in the utility model being fallen to surge compensation arrangement according to specific embodiment and Figure of description below, but this explanation does not form improper restriction of the present utility model.
Fig. 1 has shown that the feed-forward type voltage based on wind-powered electricity generation described in the utility model falls a kind of embodiment of surge compensation arrangement.Fig. 2 and Fig. 3 have shown respectively H bridge inversion unit 3 in this embodiment and the topological diagram of combining inverter 8.
As shown in Figure 1, this device comprises: controller 1, rectification unit 2, H bridge inversion unit 3, transformer 4, direct current voltage sensor 5, DC current sensor 6, AC voltage sensor 7, combining inverter 8, direct current Chopper unit 9 and wind-driven generator 10, wherein, controller 1 is realized by CPU, and its core is digital signal processor, the rectification control end of controller 1 is connected with the corresponding control end of rectification unit 2, and the H bridge inversion control end of controller 1 is connected with the corresponding control end of H bridge inversion unit 3, the DC voltage input end of controller 1 is connected with the output of direct current voltage sensor 5, the direct current input of controller 1 is connected with the output of DC current sensor 6, the alternating current input of controller 1 is connected with the output of AC voltage sensor 7, the rotor speed of controller 1, rotor angle input signal input is connected with the code-disc output that tests the speed of wind-driven generator 10, the parallel network reverse control end of controller 1 is connected with the corresponding control end of combining inverter 8, the direct current Chopper unit controls end of controller 1 is connected with the corresponding control end in direct current Chopper unit 9, the ac input end of rectification unit 2 is connected with the output of wind-driven generator 10, and the DC output end of rectification unit 2 is connected with H bridge inversion unit 3, combining inverter 8 and the DC bus end of direct current Chopper unit 9, the ac output end of H bridge inversion unit 3 is connected with the two ends of the primary coil of transformer 4, the secondary coil of transformer 4 is serially connected in the power transmission line of electrical network, is connected respectively with the feeder ear S of electrical network with load end L, the input of direct current voltage sensor 5 is connected with the DC output end of rectification unit 2, the input of DC current sensor 6 is serially connected with the DC output end of rectification unit 2, the input of AC voltage sensor 7 is connected with mains supply end S, the DC bus end of combining inverter 8 is connected with DC bus end, the DC output end of rectification unit 2 and the DC bus end of direct current Chopper unit 9 of H bridge inversion unit 3, and the ac output end of combining inverter 8 is connected with mains supply end S.As shown in Figure 2, the topological structure of H bridge inversion unit 3 comprises some triodes, and its connected mode is as figure, and in figure, DC+ and DC-are respectively positive pole and the negative pole of DC bus; AC is ac output end.As shown in Figure 3, the topological structure of combining inverter 8 comprises some triodes, and its connected mode is as figure, and in figure, DC+ and DC-are respectively positive pole and the negative pole of DC bus; AC is ac output end.
When this device work, the alternating current that rectification unit 2 produces wind-driven generator 10 is converted to direct current output; Controller 1 receives DC current values and the DC voltage value that DC current sensor 6 and direct current voltage sensor 5 transmit, and regulates the rotating speed of wind-driven generator 10 so that rectification unit 2 is carried out to maximal power tracing control; The ac voltage that controller 1 also transmits according to AC voltage sensor 7 judges the operating state of electrical network, to control H bridge inversion unit 3 output AC voltages, line voltage is fallen or surge compensates, specifically, controller 1 judges when the operating state of electrical network is normal, and controller 1 is controlled the electric energy that wind-driven generator 10 produces and injected to electrical network by combining inverter 8; Judge when electrical network generation voltage falls, the electric energy that control wind-driven generator 10 produces, by H bridge inversion unit 3 and the transformer 4 corresponding bucking voltage amount of output fast, makes the voltage U of load end L
lremain unchanged, thereby protected load, control the electric energy that wind-driven generator 10 produces simultaneously and inject to electrical network by combining inverter 8; When controller 1 judges electrical network generation voltage surge, the electric energy that control wind-driven generator 10 produces, by H bridge inversion unit 3 and the transformer 4 corresponding bucking voltage amount of output fast, makes the voltage U of load end L
lremain unchanged, thereby protected load, utilize direct current Chopper unit 9 to discharge the unnecessary energy of DC bus simultaneously, maintain the stable of DC bus-bar voltage.
Fig. 4 is the flow chart that adopts the feed-forward type voltage based on wind-powered electricity generation described in the utility model to fall surge compensation arrangement to carry out voltage and fall surge compensation.
Incorporated by reference to Fig. 1 with reference to figure 4, carry out step that voltage falls surge compensation for: pass through surveyed direct voltage U
wwith direct current I
wcalculate the power P w of rectification unit output, and it is carried out to maximal power tracing control; By the alternating supply voltage U of detection of grid
s, judge that whether grid ac voltage normal, when finding that line voltage falls or when surge, controller 1 is controlled H bridge inversion unit 3 and exported corresponding alternating voltage variable quantity, this variable quantity by transformer 4 to load terminal voltage U
lcompensate, thereby make load terminal voltage U
lbe not subject to line voltage anomalous effects, control the electric energy that combining inverter 8 exports wind-driven generator 10 simultaneously and be injected into electrical network; In the time that line voltage surge causes that DC bus-bar voltage rises, by direct current Chopper unit 9, unnecessary energy is discharged.
Concrete steps are as follows:
1) measure alternating supply voltage U by controller 1
s, the direct voltage U that exports of rectification unit 2
wwith direct current I
w, wind-driven generator 10 rotating speed and rotor angle;
2) calculate rectification unit 2 active power of output P by controller 1
w: P
w=U
w× I
w;
3) control rectification unit 2 and carry out the maximal power tracing of wind-powered electricity generation by controller 1:
Judge this rectification unit 2 active power of output P
wwhether be greater than output valve last time, if continue to increase the rotating speed of wind-driven generator 10; Otherwise the rotating speed that maintains wind-driven generator 10 is constant;
4) establish U
s0for electrical network alternating supply voltage value when normal, controller 1 is by AC voltage sensor 7 detection of grid voltage U
swhether normal:
If alternating supply voltage U
slower than normal voltage U
s090% time, be judged as line voltage and fall, controller 1 is controlled electric energy that wind-driven generator 10 produces by the 3 output compensation of H bridge inversion unit, the voltage that transformer 4 is exported meets U
j=(U
s0-U
s) (phase place of the alternating voltage that now transformer 4 is exported is identical with line voltage), unnecessary wind-powered electricity generation is passed through to combining inverter 8 to electrical network injecting power simultaneously;
If alternating supply voltage U
shigher than normal voltage U
s0110% time, be judged as line voltage surge, controller 1 is controlled electric energy that wind-driven generator 10 produces by the 3 output compensation of H bridge inversion unit, the voltage that transformer 4 is exported meets U
j=(U
s0-U
s) (phase place of the alternating voltage that now transformer 4 is exported is mutually contrary with line voltage), discharge unnecessary energy by direct current Chopper unit 9, thereby it is stable to maintain DC bus-bar voltage simultaneously.
If below either way do not meet, be judged as line voltage U
snormally, i.e. alternating supply voltage U
smeet 90%U
s0≤ U
s≤ 110%U
s0, controller 1 is controlled 3 outputs of H bridge inversion unit and is compensated for as zero, and making transformer 4 inject supply and AC line voltage distribution is zero, and the electric energy simultaneously wind-driven generator 10 being produced passes through combining inverter 8 to electrical network injecting power.
It should be noted that above cited embodiment is only specific embodiment of the utility model.Obviously the utility model is not limited to above embodiment, and the similar variation of thereupon making or distortion are that those skilled in the art can directly draw or be easy to from the disclosed content of the utility model and just associate, and all should belong to protection range of the present utility model.
Claims (7)
1. the feed-forward type voltage based on wind-powered electricity generation falls a surge compensation arrangement, it is characterized in that, comprising:
Wind-driven generator, it is alternating current output by wind power transformation;
Rectification unit, its ac input end is connected with the output of described wind-driven generator, and the alternating current of wind-driven generator output output is converted to direct current output;
H bridge inversion unit, its DC bus is connected with the DC output end of described rectification unit;
Transformer, its primary coil is connected with the output of described H bridge inversion unit, and the secondary coil of transformer is used for being serially connected in electrical network;
Combining inverter, its DC bus is connected with the DC output end of described rectification unit, and the output of combining inverter is for being connected with electrical network;
Direct current chopper unit, its DC bus is connected with the DC output end of described rectification unit;
Direct current detection device, it is connected with the DC output end of rectification unit, to detect the electric current of rectification unit output;
DC voltage detecting device, it is connected with the DC output end of rectification unit, to detect the voltage of rectification unit output;
Alternating voltage checkout gear, it is in order to be connected with electrical network, with the voltage of detection of grid;
Controller, it is connected with described direct current detection device, DC voltage detecting device, rectification unit and wind-driven generator respectively, described controller receives DC current values and the DC voltage value of direct current detection device and DC voltage detecting device transmission, regulates the rotating speed of wind-driven generator so that rectification unit is carried out to maximal power tracing control; Described controller is also connected with alternating voltage checkout gear, H bridge inversion unit, combining inverter and direct current chopper unit, described controller judges the operating state of electrical network according to the ac voltage of alternating voltage checkout gear transmission, to control H bridge inversion unit output AC voltage, line voltage is fallen or surge compensates, described controller is also controlled combining inverter and is injected electric energy to electrical network, and controls direct current chopper unit release electric energy.
2. the feed-forward type voltage based on wind-powered electricity generation as claimed in claim 1 falls surge compensation arrangement, it is characterized in that, described controller comprises digital signal processor.
3. the feed-forward type voltage based on wind-powered electricity generation as claimed in claim 1 falls surge compensation arrangement, it is characterized in that, described controller comprises single-chip microcomputer.
4. the feed-forward type voltage based on wind-powered electricity generation as claimed in claim 1 falls surge compensation arrangement, it is characterized in that, described controller comprises computer.
5. the feed-forward type voltage based on wind-powered electricity generation as claimed in claim 1 falls surge compensation arrangement, it is characterized in that, described direct current detection device comprises DC current sensor.
6. the feed-forward type voltage based on wind-powered electricity generation as claimed in claim 1 falls surge compensation arrangement, it is characterized in that, described DC voltage detecting device comprises direct current voltage sensor.
7. the feed-forward type voltage based on wind-powered electricity generation as claimed in claim 1 falls surge compensation arrangement, it is characterized in that, described alternating voltage checkout gear comprises AC voltage sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420353407.8U CN203933044U (en) | 2014-06-27 | 2014-06-27 | A kind of feed-forward type voltage based on wind-powered electricity generation falls surge compensation arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420353407.8U CN203933044U (en) | 2014-06-27 | 2014-06-27 | A kind of feed-forward type voltage based on wind-powered electricity generation falls surge compensation arrangement |
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| Publication Number | Publication Date |
|---|---|
| CN203933044U true CN203933044U (en) | 2014-11-05 |
Family
ID=51828799
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|---|---|---|---|
| CN201420353407.8U Expired - Fee Related CN203933044U (en) | 2014-06-27 | 2014-06-27 | A kind of feed-forward type voltage based on wind-powered electricity generation falls surge compensation arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203933044U (en) |
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2014
- 2014-06-27 CN CN201420353407.8U patent/CN203933044U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20210627 |