CN102694384B - Aerogenerator controller and control method - Google Patents
Aerogenerator controller and control method Download PDFInfo
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- CN102694384B CN102694384B CN201210159646.5A CN201210159646A CN102694384B CN 102694384 B CN102694384 B CN 102694384B CN 201210159646 A CN201210159646 A CN 201210159646A CN 102694384 B CN102694384 B CN 102694384B
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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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention discloses an aerogenerator controller and a control method, which solvethe problem of controlling accuracy of output power of an aerogenerator. The aerogenerator controller includes: a sampling circuit, which samples an electrical information from a load end and sends a sampling signal to a harmonic wave control circuit; aharmonic wave control circuit, which receives the sampling signal from the sampling circuit, monitors a power supply state of a load according to the sampling signal and outputs a harmonic wave control signal to a harmonic wave injected circuit; wherein the harmonic wave injected circuit is coupled to a winding of the aerogenerator, receives the harmonic wave control signal from the harmonic wave control circuit, and adjusts a harmonic wave injected into the aerogenerator winding according to the said harmonic wave control signal. This invention can control the output voltage and power of the aerogenerator at a high accurate level and do not need an unload device with a huge volume.
Description
Technical field
The present invention relates to technical field of motors, particularly a kind of wind driven generator controller and a kind of wind powered generator control method.
Background technology
Energy shortage become the whole world common faced by matter of utmost importance, wind energy is subject to the great attention of various countries as clean energy resource.China has abundant wind energy resources, and the market prospects of wind power plant manufacturing industry and association area are very wide.
Existing wind driven generator controller, must be furnished with unloader.After wind is large or battery is full of, adopt the power output mode of wind power generation acc power unloading being controlled to wind-driven generator, under normal circumstances, unloader power is 2 times of wind power generation acc power.In said method, unloader forms primarily of power resistor, by the energy unloading that power resistor is unnecessary to wind-driven generator, when therefore working, the temperature of unloader may up to more than 200 degree, and the controller of high-power wind-driven generator, the required unloader be equipped with is bulky, and take up room large, security reliability is poor.
Summary of the invention
The technical problem to be solved in the present invention is that existing wind driven generator controller realizes the control to wind driven generator output power by unloader, and unloader takes up room greatly, and security reliability is poor.
To achieve these goals, the invention provides a kind of wind driven generator controller, comprising: sample circuit, harmonic controling circuit and harmonic wave injection circuit, wherein: described sample circuit, for the electric information of load end of sampling, sampled signal is sent to described harmonic controling circuit; Described harmonic controling circuit, for receiving described sampled signal, according to the power supply state of described sampled signal monitoring load, output harmonic wave control signal is to harmonic injection circuit; Described harmonic injection circuit, for being couple to the winding of wind-driven generator, receives the harmonic controling signal of harmonic controling circuit, and injects the harmonic wave of wind-driven generator winding according to described harmonic controling Signal Regulation.
Alternatively, described harmonic injection circuit is couple to arbitrary phase winding of wind-driven generator, wantonly two phase windings or three-phase windings.
Alternatively, described harmonic injection circuit comprises gate-controlled switch, and one end is couple to described wind-driven generator winding, and the other end is coupled to ground current potential, and the control end of gate-controlled switch is couple to described harmonic controling circuit, according to described harmonic controling signal conduction and shutoff.
Alternatively, also buffer circuit is comprised; Described harmonic controling circuit is couple to the control end of described gate-controlled switch by described buffer circuit.
Alternatively, described harmonic controling circuit comprises: comparison circuit, for by described sampled signal compared with reference voltage, according to comparative result output harmonic wave control signal to control the braking of wind-driven generator, increase the pulse duration of harmonic controling signal to increase braking action, the pulse duration of harmonic reduction control signal is to reduce braking action.
Alternatively, described gate-controlled switch is N-type mosfet transistor, and the gate pole of described N-type mosfet transistor is couple to described harmonic controling circuit, drain electrode is couple to described wind-driven generator winding, source electrode is coupled to ground current potential.
Present invention also offers a kind of wind powered generator control method, comprise the following steps:
By the power supply state of the electric information monitoring load end of load end of sampling;
The magnetic resistance of wind-driven generator is regulated according to sampled signal; Wherein, by increasing the magnetic resistance of wind-driven generator to increase braking action, by reducing the magnetic resistance of wind-driven generator to reduce braking action.
Alternatively, in direction wind-driven generator, arbitrary phase winding, wantonly two phase windings or three-phase windings harmonic regulate the magnetic resistance of wind-driven generator.
Alternatively, by gate-controlled switch, described winding is coupled to ground current potential, when increasing harmonic, increases the ON time of gate-controlled switch; When reducing harmonic, reduce the ON time of gate-controlled switch.
Alternatively, by N-type mosfet transistor, described winding is coupled to ground current potential.
The invention has the beneficial effects as follows:
(1) by regulating the magnetic resistance of wind-driven generator to realize braking, thus realize controlling the high accuracy of wind driven generator output power;
(2) regulate the rotating speed of wind-driven generator in real time according to the power supply state of load, control precision is high;
(3) eliminate unloader, save space, improve security reliability and stability.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit block diagram of wind driven generator controller of the present invention;
Fig. 2 is the circuit diagram of a wind driven generator controller of the present invention embodiment;
Fig. 3 is the flow chart of wind powered generator control method of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the circuit block diagram of wind driven generator controller of the present invention.
As shown in Figure 1, wind energy transformation is AC energy by wind-driven generator 101, converts AC energy to direct current energy be supplied to load 103 by rectification circuit 102.Such as, load 103 can comprise storage battery, receives direct current energy charge from rectification circuit 102; Again such as, load 103 can comprise combining inverter and electrical network, by combining inverter, direct current energy is fed back to electrical network.
When wind-driven generator 101 run into power output unnecessary, need carry out the situation unloaded time, such as, when wind-force increases suddenly, or accumulator load charging at the end of, carry out brake operating by controller 104 pairs of wind-driven generators 101.Controller 104 comprises sample circuit 105, harmonic controling circuit 106 and harmonic wave injection circuit 107.
Sample circuit 105 is sampled the electric information in load 103, export sampled signal to harmonic controling circuit 106, such as sample circuit 105 is sampled the voltage in load 103, output voltage sampled signal is to harmonic controling circuit 106, and sample circuit 104 can also be sampled the electric information such as electric current or power in load 103.
Harmonic controling circuit 106 receives the sampled signal of sample circuit 105, according to the power supply state of sampled signal monitoring load 103, when power supply state changes, output harmonic wave control signal, to harmonic injection circuit 107, controls the winding harmonic of harmonic injection circuit 107 direction wind-driven generator 101.
Harmonic injection circuit 107 is couple to the winding of wind-driven generator 101, receive the harmonic controling signal of self-controller 106, the harmonic wave of wind-driven generator winding is injected according to harmonic controling Signal Regulation, the harmonic wave injected destroys the current balance type between wind-driven generator winding, the magnetic resistance of wind-driven generator winding is caused to change, magnetic resistance can hinder the rotation of wind power generator rotor, thus realizes the control for brake to wind-driven generator.
Such as load is the situation of storage battery, and after charge in batteries terminates, the voltage at storage battery two ends can raise.The voltage at sample circuit 104 pairs of storage battery two ends is sampled, and the voltage sampling signal being sent to controller 106 also can raise.Harmonic controling circuit 106 is according to voltage sampling signal output harmonic wave control signal, harmonic injection circuit 107 direction wind-driven generator 101 increases harmonic, the magnetic resistance produced also correspondingly increases, hinder the rotation of wind power generator rotor, realize the control for brake to wind-driven generator, and then realize the accurate control to wind driven generator output power.
Fig. 2 is the circuit diagram of a wind driven generator controller of the present invention embodiment.
As shown in Figure 2, wind-driven generator 201 exports AC1, AC2, AC3 threephase AC electric energy, and by the rectification of three-phase bridge rectification circuit 202, DC power output is to load 203.Controller 204 comprises sample circuit 205, harmonic controling circuit 206 and harmonic wave injection circuit 207.Harmonic injection circuit 207 comprises gate-controlled switch 208, one end of gate-controlled switch 208 is couple to arbitrary phase winding of wind-driven generator 201, the other end of gate-controlled switch 208 is coupled to ground current potential, control end is couple to harmonic controling circuit 206, and earth potential is obtained through rectification by two phase windings wantonly in wind-driven generator 201.Gate-controlled switch 208 in Fig. 2 is N-type MOSFET (MOS (metal-oxide-semiconductor) memory) transistor, the drain electrode of mosfet transistor is couple to the AC3 phase winding of wind-driven generator 201, source electrode is coupled to ground current potential, gate pole is couple to harmonic controling circuit 206, receive harmonic controling signal, according to the turn-on and turn-off of harmonic controling signal controlling N-type mosfet transistor.Harmonic controling circuit 206 comprises comparison circuit (not shown in Fig. 2), and sampled signal compared with reference voltage, when sampled signal is greater than reference voltage, needs to increase braking action, increases the pulse duration of harmonic controling signal by comparison circuit; When sampled signal is less than reference voltage, need to reduce braking action, the pulse duration of harmonic reduction control signal.Due to the turn-on and turn-off of mosfet transistor, current harmonics is injected into AC3 phase winding, causes AC1, AC2, AC3 three-phase windings current imbalance, and then causes the change of wind-driven generator 201 magnetic resistance.When the pulse duration of harmonic controling signal increases, the ON time of N-type mosfet transistor increases, and the magnetic resistance of wind-driven generator increases; When the pulse duration of harmonic controling signal reduces, the ON time of N-type mosfet transistor reduces, and the magnetic resistance of wind-driven generator reduces.By the control of the harmonic wave to injection wind-driven generator 201, achieve the control for brake to wind power generator rotor, and then accurately control the power output of wind-driven generator.
According to wind driven generator controller of the present invention embodiment, controller 204 also can comprise dual harmonic injection circuit, is couple to wantonly two phase windings of wind-driven generator 201 respectively; Or controller 204 comprises three harmonic injection circuit, is couple to the three-phase windings of wind-driven generator 201 respectively.Those skilled in the art instruction according to the present invention can select the winding harmonic of any suitable harmonic injection circuit direction wind-driven generator, to reach the effect destroying wind-driven generator three-phase windings current balance type, and then cause the magnetic resistance of wind-driven generator to change, realize the braking of wind power generator rotor.
In the present embodiment, brake 204 also comprises buffer circuit (not shown in Fig. 2), harmonic controling circuit 206 is couple to the control end of gate-controlled switch 208 by buffer circuit, to realize more stable control effects, ensures gate-controlled switch 208 turn-on and turn-off reliably.
Gate-controlled switch 208 in the present embodiment is only schematic for mosfet transistor, and those skilled in the art can select any suitable gate-controlled switch to carry out the operation of harmonic injection.
Fig. 3 is the flow chart of wind powered generator control method of the present invention.
As shown in Figure 3, wind powered generator control method of the present invention comprises the following steps:
Step (a), by the power supply state of the electric information monitoring load end of load end of sampling;
Step (b), regulates the magnetic resistance of wind-driven generator according to sampled signal, when needs increase braking action, increase the magnetic resistance of wind-driven generator; When needs reduce braking action, reduce the magnetic resistance of wind-driven generator.
In step (a), the voltage of load end of can sampling, the electric information such as electric current or power carry out the power supply state of monitoring load end.
In step (b), regulated the magnetic resistance of wind-driven generator by phase winding arbitrary in direction wind-driven generator, wantonly two phase windings or three-phase windings harmonic.The injection of harmonic wave destroys the balance of electric current between wind-driven generator winding, causes the change of generator magnetic resistance, and then realizes the braking to generator amature, accurately controls the power that wind-driven generator exports.
To the control for brake of generator amature, can by sampled signal compared with reference voltage, when sampled signal is greater than reference voltage, needs to increase braking action, increase direction wind-driven generator harmonic, the magnetic resistance of generator increases; When sampled signal is less than reference voltage, needs to reduce braking action, reduce direction wind-driven generator harmonic, the magnetic resistance of generator reduces, and by changing the size of magnetic resistance, realizes the control to generator brake.
The operation of direction wind-driven generator harmonic, can be coupled to ground current potential by generator windings by gate-controlled switch, and the turn-on and turn-off controlling gate-controlled switch just can realize to generator windings harmonic.When increasing harmonic, increase the ON time of gate-controlled switch; When reducing harmonic, reduce the ON time of gate-controlled switch.Such as gate-controlled switch can be N-type mosfet transistor.
Such as load is the situation of storage battery, after storage battery completes charging, it is excessive that the power output of wind-driven generator there will be, the voltage at storage battery two ends can rise, sampled signal also can rise, by sampled signal compared with reference voltage, when sampled signal is greater than reference voltage, need to increase braking action, increase direction wind-driven generator harmonic; When sampled signal is less than reference voltage, needs to reduce braking action, reduce direction wind-driven generator harmonic.
Those skilled in the art can also direction wind-driven generator harmonic by other means, to reach the effect destroying current balance type between wind-driven generator winding, and then regulate wind-driven generator magnetic resistance, realize the control for brake to wind power generator rotor, accurately control the power output of wind-driven generator.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a wind driven generator controller, is characterized in that, comprises sample circuit, harmonic controling circuit and harmonic wave injection circuit, wherein:
Described sample circuit, for the electric information of load end of sampling, is sent to described harmonic controling circuit by sampled signal;
Described harmonic controling circuit, for receiving described sampled signal, according to the power supply state of described sampled signal monitoring load, output harmonic wave control signal is to harmonic injection circuit;
Described harmonic injection circuit, for being couple to the winding of wind-driven generator, receives the harmonic controling signal of harmonic controling circuit, and injects the harmonic wave of wind-driven generator winding according to described harmonic controling Signal Regulation;
Described harmonic injection circuit is couple to arbitrary phase winding of wind-driven generator, wantonly two phase windings or three-phase windings;
Described harmonic injection circuit comprises: gate-controlled switch, and one end is couple to described wind-driven generator winding, and the other end is coupled to ground current potential, and the control end of gate-controlled switch is couple to described harmonic controling circuit, according to described harmonic controling signal conduction and shutoff;
Buffer circuit; Described harmonic controling circuit is couple to the control end of described gate-controlled switch by described buffer circuit;
Described harmonic controling circuit comprises: comparison circuit, for by described sampled signal compared with reference voltage, according to comparative result output harmonic wave control signal to control the braking of wind-driven generator, increase the pulse duration of harmonic controling signal to increase braking action, the pulse duration of harmonic reduction control signal is to reduce braking action.
2. wind driven generator controller as claimed in claim 1, it is characterized in that, described gate-controlled switch is N-type mosfet transistor, and the gate pole of described N-type mosfet transistor is couple to described harmonic controling circuit, drain electrode is couple to described wind-driven generator winding, source electrode is coupled to ground current potential.
3. a wind powered generator control method, is characterized in that, comprises the following steps:
By the power supply state of the electric information monitoring load end of load end of sampling;
The magnetic resistance of wind-driven generator is regulated according to phase winding arbitrary in sampled signal direction wind-driven generator, wantonly two phase windings or three-phase windings harmonic; Wherein, by increasing the magnetic resistance of wind-driven generator to increase braking action, by reducing the magnetic resistance of wind-driven generator to reduce braking action.
4. wind powered generator control method as claimed in claim 3, is characterized in that, by gate-controlled switch, described winding is coupled to ground current potential, when increasing harmonic, increases the ON time of gate-controlled switch; When reducing harmonic, reduce the ON time of gate-controlled switch.
5. wind powered generator control method as claimed in claim 4, is characterized in that, by N-type mosfet transistor, described winding is coupled to ground current potential.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210159646.5A CN102694384B (en) | 2012-05-22 | 2012-05-22 | Aerogenerator controller and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210159646.5A CN102694384B (en) | 2012-05-22 | 2012-05-22 | Aerogenerator controller and control method |
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| CN102694384A CN102694384A (en) | 2012-09-26 |
| CN102694384B true CN102694384B (en) | 2015-04-01 |
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| CN201210159646.5A Active CN102694384B (en) | 2012-05-22 | 2012-05-22 | Aerogenerator controller and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103475026B (en) * | 2013-09-17 | 2015-07-01 | 济南德明电源设备有限公司 | Grid connection and grid disconnection integrated device and method for micro-grid wind driven generator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4906860A (en) * | 1987-11-16 | 1990-03-06 | Mitsubishi Denki Kabushiki Kaisha | Control device for active filter |
| CN201869112U (en) * | 2010-11-08 | 2011-06-15 | 新高能源科技股份有限公司 | Electric power conversion device for wind-driven power generation |
| CN102185336A (en) * | 2011-05-06 | 2011-09-14 | 潘迪 | Wind power generating equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004320972A (en) * | 2003-03-28 | 2004-11-11 | Matsushita Electric Ind Co Ltd | Permanent magnet rotating electric machine and its controlling method, vehicle, wind power generator system, and engine generator |
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- 2012-05-22 CN CN201210159646.5A patent/CN102694384B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4906860A (en) * | 1987-11-16 | 1990-03-06 | Mitsubishi Denki Kabushiki Kaisha | Control device for active filter |
| CN201869112U (en) * | 2010-11-08 | 2011-06-15 | 新高能源科技股份有限公司 | Electric power conversion device for wind-driven power generation |
| CN102185336A (en) * | 2011-05-06 | 2011-09-14 | 潘迪 | Wind power generating equipment |
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