CN203491715U - A grid-connected off-grid integrated device for a microgrid wind-driven generator - Google Patents
A grid-connected off-grid integrated device for a microgrid wind-driven generator Download PDFInfo
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- CN203491715U CN203491715U CN201320577553.4U CN201320577553U CN203491715U CN 203491715 U CN203491715 U CN 203491715U CN 201320577553 U CN201320577553 U CN 201320577553U CN 203491715 U CN203491715 U CN 203491715U
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- wind
- driven generator
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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
Abstract
The utility model discloses a grid-connected off-grid integrated device for a microgrid wind-driven generator. The grid-connected off-grid integrated device comprises a control circuit, a three-phase rectification circuit 1, a three-phase rectification circuit 2, a DC/DC power supply 1, a DC/DC power supply 2, a manual switch, and a protection circuit. The grid-connected off-grid integrated device has beneficial effects that after acquiring electricity from the wind-driven generator, the grid-connected off-grid integrated device for a microgrid wind-driven generator performs off-grid and grid-connected operation so as to decrease intermediate links, save cost, and highly-efficiently use energy, and that a microgrid wind-driven power generation system or wind-photovoltaic complementary microgrid power generation technology can be achieved just by one draught fan, one grid-connected off-grid control integrated device, and two inverters.
Description
Technical field
The utility model relates to wind power generator control system, relates in particular to the grid-connected from net integrated device of a kind of micro-electrical network wind-driven generator.
Background technology
Existing wind driven generator controller, only has off-net wind-driven generator controller or wind power generator incorporated in power network controller.Off-net wind-driven generator controller is used for from net wind generator system, and off-net wind-driven generator controller is controlled the charging of blower fan accumulators group, then the electric energy of batteries is reverse into alternating current, powering load.Wind power generator incorporated in power network controller is for grid-connected wind generator system, and wind power generator incorporated in power network controller is controlled the direct voltage of blower fan stable output and supplied with combining inverter, and then combining inverter tracking network is electric, and power delivery is arrived to electrical network.
Our country is carrying out micro-grid generation energetically, and in grid-connected system, when net electricity has a power failure or overhauls, wind-driven generator is in on-position, and the energy cannot arrive efficient utilization; In off-grid system, may there is the remaining situation of electricity consumption, cause the waste of the energy, be so just badly in need of an equipment and can realize grid-connected and from net simultaneously.
The combining inverter publicity of some producer has this function, but through investigation, these producers have added an electric charger of net by combining inverter to charge a battery, wind energy becomes electric energy by wind-driven generator, then the DC by controller stable output is to combining inverter, combining inverter transmission of electricity online, there is again net electricity to charge a battery, centre has increased too many link, and each link can cause the waste of the energy, controls cost higher.Wind-driven generator of the present utility model grid-connected from network control integrated device processed directly from wind-driven generator power taking, carry out respectively from net and grid-connected, only need that a Fans, one are grid-connected just can realize the micro-grid generation system of wind-force or the micro-grid generation system of wind light mutual complementing from network control integrated device processed, two inverters, reduced intermediate link, greatly save cost, can utilize more efficiently the energy.
Utility model content
In order to overcome the above problems, the utility model provides the grid-connected from net integrated device of a kind of micro-electrical network wind-driven generator.By wind-driven generator grid-connected from network control all-in-one processed directly from wind-driven generator power taking, carry out respectively from net and grid-connected, reduced intermediate link, improved the utilance of the energy.
To achieve these goals, the utility model adopts following technical scheme:
Micro-electrical network wind-driven generator grid-connected from a net integrated device, comprising: control circuit, rectified three-phase circuit one, rectified three-phase circuit two, DC/DC power supply one, DC/DC power supply two, hand switch and protective circuit.
Wind-driven generator is connected with described rectified three-phase circuit one and batteries, wind-driven generator and described hand switch, rectified three-phase circuit two, DC/DC power supply two, combining inverter series connection, the series arm of described rectified three-phase circuit one and batteries and described hand switch, rectified three-phase circuit two, DC/DC power supply two, the series arm of combining inverter is connected in parallel, described DC/DC power supply one is connected respectively with described protective circuit with described control circuit, described DC/DC power supply one and described control circuit are couple to respectively the output of rectified three-phase circuit one, described control circuit is couple on the winding of wind-driven generator.
Between described rectified three-phase circuit one and batteries, can increase as required DC/DC voltage reduction module.
Described control circuit comprises: sample circuit, harmonic wave control circuit and harmonic wave injection circuit; Described sample circuit is couple to the output of described rectified three-phase circuit one, described sample circuit is sent to harmonic wave control circuit by sampled signal, described harmonic wave control circuit is connected with described harmonic wave injection circuit, and described harmonic wave injection circuit is couple on wind-driven generator winding.
Described harmonic wave injection circuit comprises: harmonic wave injection circuit one, harmonic wave injection circuit two, harmonic wave injection circuit three; Described harmonic wave injection circuit one is couple to L1, the L2 winding in wind-driven generator three phase windings, described harmonic wave injection circuit two is couple to L2, the L3 winding in wind-driven generator three phase windings, and described harmonic wave injection circuit three is couple to L1, the L3 winding in wind-driven generator three phase windings.
Described harmonic wave injection circuit is composed in series by gate-controlled switch and diode.
Described gate-controlled switch is N-type mosfet transistor, the gate pole of described N-type mosfet transistor is connected with the negative electrode of described diode with described harmonic wave control circuit is connected, source electrode is couple to wind-driven generator winding, drain electrode, and the anode of described diode is couple to the winding of wind-driven generator.
Described protective circuit is comprised of relay J 1, relay J 2; the power supply coil of described relay J 1, relay J 2 is connected with DC/DC power supply; the common point of described relay J 1, relay J 2 is connected with the L1 in wind-driven generator three phase windings; the normally-closed contact of described relay J 1 is connected with the L2 in wind-driven generator three phase windings; relay J 2 normally-closed contacts are connected with the L3 in wind-driven generator three phase windings, and L1, L2, L3 divide without sequencing.
For the ease of understanding, the three-phase winding L 1 that is couple to three-phase wind-driven generator described in the utility model, L2, L3 is exemplary, there is no dividing of sequencing, one of ordinary skill in the art can be according to actual conditions to three-phase winding L 1, L2, L3 sorts arbitrarily.
The beneficial effects of the utility model:
Micro-electrical network wind-driven generator of the present utility model grid-connected from net integrated device directly from wind-driven generator power taking, carry out respectively from net and grid-connected, reduced intermediate link, greatly saved cost, the energy be can utilize more efficiently, a Fans, a grid-connected technology that just can realize the micro-grid generation system of wind-force or the micro-grid generation of wind light mutual complementing from network control integrated device processed, two inverters only needed; Unique controller design simplification the control mode of high-power wind-driven generator, make to control more accurate; Reduce wind-driven generator and produced and maintenance cost, be more beneficial to market sale.
Accompanying drawing explanation
Fig. 1 is the grid-connected structural representation from net integrated device of the micro-electrical network wind-driven generator of the utility model;
Fig. 2 is the grid-connected schematic diagram from net integrated device of the micro-electrical network wind-driven generator of the utility model.
Wherein, 101. is grid-connected from net integrated device, 102. unloader, 103. from net inverter, 104. AC load, 105. kilowatt-hour meter, 301. wind-driven generator, 302. rectified three-phase circuits one, 303.DC/DC voltage reduction module, 304. control circuit, 305. sample circuit, 306. harmonic wave control circuits, 307. harmonic wave injection circuits one, 308. harmonic wave injection circuits two, 309. harmonic wave injection circuits three, 310. gate-controlled switch, 311.DC/DC power supply one, 312. protective circuit, 313. batteries, 314. hand switch, 315. rectified three-phase circuits two, 316.DC/DC power supply two, 317. combining inverter.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, control grid-connectedly from net integrated device 101, the three-phase alternating current that wind-driven generator 301 is sent carries out respectively from net and grid-connected, from mesh portions by power storage to batteries 313, through being AC energy from net inverter 103 by direct current energy inversion, give AC load 104 power supplies; And mesh portions is alternating current through combining inverter 317 by direct current energy inversion, connect after kilowatt-hour meter 105, be connected to the grid.Unloader 102 is optional part, is mainly used in controlling power output and the braking of wind-driven generator.
As shown in Figure 2, the grid-connected of micro-electrical network wind-driven generator comprises from net integrated device: wind-driven generator 301, control circuit 304, rectified three-phase circuit 1, rectified three-phase circuit 2 315, DC/DC power supply 1, DC/DC power supply 2 316, protective circuit 312, combining inverter 317 and batteries 313.
Wind-driven generator 301 is connected with rectified three-phase circuit 1 and batteries 313, wind-driven generator 301 and hand switch 314, rectified three-phase circuit 2 315, DC/DC power supply 2 316 and combining inverter 317 series connection, combining inverter 317 access electrical networks, series arm and hand switch 314 that rectified three-phase circuit 1 and batteries 313 form, rectified three-phase circuit 2 315, the series arm that DC/DC power supply 2 316 and combining inverter 317 form is connected in parallel, DC/DC power supply 1 is connected respectively with protective circuit 312 with control circuit 304, DC/DC power supply 1 and control circuit 304 are couple to respectively the output of rectified three-phase circuit 1, control circuit 304 is couple on the winding of described wind-driven generator 301.
According to different client's needs, can select from net control section with DC/DC voltage reduction module 303.Because most of grid-connected system, the input voltage that combining inverter 317 requires is higher, just can be grid-connected during higher than line voltage at combining inverter 317 input voltages, for the wind-driven generator output voltage of grid-connected wind generator system than high from the wind-driven generator output voltage of net wind generator system.If grid-connected wind-driven generator is applied in the grid-connected wind generator system of net, from mesh portions, need huge batteries 313, storage battery is very expensive, is not suitable for family and uses.Increase DC/DC voltage reduction module 303, just solved this problem.The high-voltage variable that DC/DC voltage reduction module 303 can send wind-driven generator is that low-voltage charges a battery.The grid-connected practicality from net integrated device that has increased so micro-electrical network wind-driven generator, has also improved wind power generation efficiency more.
First family and local user will meet the demand of off-grid system power supply, when having electric weight remaining, are just connected to the grid, and at grid-connected control section, have increased hand switch 314.When wind-force not enough, energy output hour, user can the grid-connected control section of manual-lock, makes electric energy that wind-driven generator sends only to batteries 313 chargings, guarantees family or local customer power supply.
Three-phase wind-driven generator 301 output L1, L2, L3 threephase AC electric energy, by the rectification of rectified three-phase circuit 1, DC power output is to batteries 313.By the rectification of rectified three-phase circuit 2 315, DC power output is to DC/DC circuit 2 316, then carries the galvanic current can be to combining inverter 317, and combining inverter 317 inverse of the DC into AC flow to electrical network.DC/DC power supply 1, provides stable working power to control circuit 304.
Harmonic wave control circuit 306 comprises comparison circuit (not shown in Fig. 2), and comparison circuit is compared sampled signal with reference voltage, when sampled signal is greater than reference voltage, need to increase braking action, increases the pulse duration of humorous wave control signal; When sampled signal is less than reference voltage, need to reduce braking action, the pulse duration of harmonic reduction control signal.Turn-on and turn-off due to mosfet transistor, current harmonics is injected into L1, L2, L3 phase winding, in wind power generator rotor, form induced potential and electric current, the torque direction of its generation is contrary with the rotary speed direction of motor, produce resistance, play and control wind-driven generator 301 power outputs and braking action.When the pulse duration of humorous wave control signal increases, the ON time of N-type mosfet transistor increases, and the magnetic resistance of wind-driven generator 301 increases; When the pulse duration of humorous wave control signal reduces, the ON time of N-type mosfet transistor reduces, and the magnetic resistance of wind-driven generator 301 reduces.By to injecting the control of the harmonic wave of wind-driven generator 301, realized the braking of wind-driven generator 301 rotors has been controlled, and then accurately controlled the power output of wind-driven generator 301.
Because control mode is to control power output and the braking of wind-driven generator 301 by adjusting wind-driven generator 301 rotating speeds, so when wind-driven generator 301 causes overtension greatly because of wind, above-mentioned control circuit works, thereby control the rotating speed of wind-driven generator 301, guarantee that wind-driven generator 301 input rectified three-phase circuit 2 315 voltages can be not too high, can be not too high by the direct voltage after rectified three-phase circuit 2 315 rectifications yet, the voltage that guarantees 2 316 outputs of DC/DC circuit can be not too high and damage combining inverter 317.
Any components and parts all likely damage; if DC/DC power supply 1 damages; whole control circuit 304 has not had stable working power; wind-driven generator 301 is by out of control; increased protective circuit 312, the wind-driven generator three-phase brake control circuit of mainly being made by relay J 1, relay J 2 for this reason.Once DC/DC power supply 1 damages, relay works in normally closed point, and now wind-driven generator 301 is in three-phase braking state.The power supply coil of relay connects DC/DC power supply 1, the common point of relay J 1, relay J 2 connects the L1 of wind-driven generator 301, the normally closed point of relay J 1 connects the L2 of wind-driven generator 301, the normally closed point of relay J 2 connects the L3 of wind-driven generator 301, and wherein L1, L2, L3 divide without sequencing.
Although above-mentioned, by reference to the accompanying drawings embodiment of the present utility model is described; but the not restriction to utility model protection scope; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection range of the present utility model.
Claims (7)
1. the grid-connected of micro-electrical network wind-driven generator is characterized in that from a net integrated device, comprising: control circuit, rectified three-phase circuit one, rectified three-phase circuit two, DC/DC power supply one, DC/DC power supply two, hand switch and protective circuit;
Wind-driven generator is connected with described rectified three-phase circuit one and batteries, wind-driven generator and described hand switch, rectified three-phase circuit two, DC/DC power supply two, combining inverter series connection, the series arm of described rectified three-phase circuit one and batteries and described hand switch, rectified three-phase circuit two, DC/DC power supply two, the series arm of combining inverter is connected in parallel, described DC/DC power supply one is connected respectively with described protective circuit with described control circuit, described DC/DC power supply one and described control circuit are couple to respectively the output of rectified three-phase circuit one, described control circuit is couple on the winding of wind-driven generator.
2. the grid-connected of a kind of micro-electrical network wind-driven generator as claimed in claim 1 is characterized in that from net integrated device, between described rectified three-phase circuit one and batteries, can increase as required DC/DC voltage reduction module.
3. the grid-connected of a kind of micro-electrical network wind-driven generator as claimed in claim 1 is characterized in that from net integrated device, and described control circuit comprises: sample circuit, harmonic wave control circuit and harmonic wave injection circuit; Described sample circuit is couple to the output of described rectified three-phase circuit one, described sample circuit is sent to harmonic wave control circuit by sampled signal, described harmonic wave control circuit is connected with described harmonic wave injection circuit, and described harmonic wave injection circuit is couple on wind-driven generator winding.
4. the grid-connected of a kind of micro-electrical network wind-driven generator as claimed in claim 3 is characterized in that from net integrated device, and described harmonic wave injection circuit comprises: harmonic wave injection circuit one, harmonic wave injection circuit two, harmonic wave injection circuit three; Described harmonic wave injection circuit one is couple to L1, the L2 winding in wind-driven generator three phase windings, described harmonic wave injection circuit two is couple to L2, the L3 winding in wind-driven generator three phase windings, and described harmonic wave injection circuit three is couple to L1, the L3 winding in wind-driven generator three phase windings.
5. the grid-connected of a kind of micro-electrical network wind-driven generator as claimed in claim 3 is characterized in that from net integrated device, and described harmonic wave injection circuit is composed in series by gate-controlled switch and diode.
6. a kind of micro-electrical network wind-driven generator as claimed in claim 5 is grid-connected from net integrated device, it is characterized in that, described gate-controlled switch is N-type mosfet transistor, the gate pole of described N-type mosfet transistor is connected with the negative electrode of described diode with described harmonic wave control circuit is connected, source electrode is couple to wind-driven generator winding, drain electrode, and the anode of described diode is couple to the winding of wind-driven generator.
7. a kind of micro-electrical network wind-driven generator as claimed in claim 1 is grid-connected from net integrated device; it is characterized in that; described protective circuit is comprised of relay J 1, relay J 2; the power supply coil of described relay J 1, relay J 2 is connected with DC/DC power supply; the common point of described relay J 1, relay J 2 is connected with the L1 in wind-driven generator three phase windings; the normally-closed contact of described relay J 1 is connected with the L2 in wind-driven generator three phase windings; relay J 2 normally-closed contacts are connected with the L3 in wind-driven generator three phase windings, and L1, L2, L3 divide without sequencing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577553.4U CN203491715U (en) | 2013-09-17 | 2013-09-17 | A grid-connected off-grid integrated device for a microgrid wind-driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577553.4U CN203491715U (en) | 2013-09-17 | 2013-09-17 | A grid-connected off-grid integrated device for a microgrid wind-driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN203491715U true CN203491715U (en) | 2014-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320577553.4U Withdrawn - After Issue CN203491715U (en) | 2013-09-17 | 2013-09-17 | A grid-connected off-grid integrated device for a microgrid wind-driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203491715U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475026A (en) * | 2013-09-17 | 2013-12-25 | 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 |
| CN105932702A (en) * | 2015-10-23 | 2016-09-07 | 无锡美凯能源科技有限公司 | Parallel microgrid energy storage inversion apparatus |
-
2013
- 2013-09-17 CN CN201320577553.4U patent/CN203491715U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475026A (en) * | 2013-09-17 | 2013-12-25 | 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 |
| 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 |
| CN105932702A (en) * | 2015-10-23 | 2016-09-07 | 无锡美凯能源科技有限公司 | Parallel microgrid energy storage inversion apparatus |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140319 Effective date of abandoning: 20150701 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140319 Effective date of abandoning: 20150701 |
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| RGAV | Abandon patent right to avoid regrant |