CN201185403Y - Circuit for controlling speed of wind generating set fan and system thereof - Google Patents
Circuit for controlling speed of wind generating set fan and system thereof Download PDFInfo
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- CN201185403Y CN201185403Y CNU200720159082XU CN200720159082U CN201185403Y CN 201185403 Y CN201185403 Y CN 201185403Y CN U200720159082X U CNU200720159082X U CN U200720159082XU CN 200720159082 U CN200720159082 U CN 200720159082U CN 201185403 Y CN201185403 Y CN 201185403Y
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Abstract
The utility model relates to a wind turbine fan speed control circuit and a speed control system thereof. A three-phase output phase line of the wind turbine is connected with a grid-connected convertor circuit and a fan speed control circuit, wherein, the grid-connected convertor circuit consists of a rectifier circuit, a brake circuit, a filter circuit and a grid-connected inverter circuit, and is connected to a power network via the grid-connected inverter circuit; the fan speed control circuit connects one end of a switch circuit with self-locking function with one ends of braking resistors with certain power in series, while the other ends of the resistors are linked in suspension without grounding; the other end of the switch circuit with self-locking function is respectively connected with the three-phase output lines of the wind turbine. The utility model tracks and monitors the rev of the fan and inputs the error signals generated by the rev of the fan into a controller to be processed, and control signals are output to adjust the rev of the fan, thereby the prior control methods, such as mechanical contracting brake and hydraulic braking, etc, are replaced.
Description
Technical field
The utility model relates to wind-driven power generation control system.
Background technology
In wind generator system, all adopt grid-connected converter to generate electricity by way of merging two or more grid systems, it is that the grid-connected converter circuit is connected with the three-phase output phase line of wind-driven generator, converter circuit is made up of rectification circuit, skidding circuit, filter circuit, inverter circuit, is transported to electrical network by inverter circuit then.Various abnormal conditions appear in this system sometimes, grid-connected converter in the wind generator system is quit work, generator in the wind generator system is equivalent to unloaded situation at this moment, if do not take effectively to control rotation speed of fan, wind speed may well make blower fan out of control.At present, the general conventional control method that is adopted is a mechanical hatching gate, hydraulic braking etc., and the problem that its method exists is exactly that response speed is slow, occurs controlling phenomenons such as bad easily.
Summary of the invention
The utility model provides a kind of wind turbine generator blower fan speed controllable circuit and control speed system in order to solve effective control problem of rotation speed of fan in the above-mentioned wind generator system.
For achieving the above object, the utility model blower fan speed controllable circuit structure is: with an end and necessarily brake resistance one an end series connection of power with switching circuit of self-locking function, the other end of each resistance is linked together, and is unsettled earth-free; The other end of self-locking function switching circuit is connected to respectively on the three-phase output line of wind-driven generator.
Wind turbine generator blower fan control speed system of the present utility model is to be connected with the grid-connected converter circuit on the three-phase output phase line of wind-driven generator, the grid-connected converter circuit is made up of rectification circuit, skidding circuit, filter circuit, grid-connected inverter circuit, be transported to electrical network by grid-connected inverter circuit then, it is characterized in that, on the three-phase output phase line of wind-driven generator, also be connected with above-mentioned blower fan speed controllable circuit.
Wind turbine generator blower fan control speed system can adopt single-chip microcomputer or PLC control.
Circuit working principle of the present utility model is: this circuit be with wind generator system in the grid-connected converter cooperating.In the rotation speed of fan scope of setting, its switching circuit is in off-state, and rotation speed of fan is not braked the control of resistance circuit.When wind generator system form was routinely devoted oneself to work, blower fan moved in the rotating speed of setting.At this moment, the excess energy in the wind generator system is controlled by skidding circuit in the current transformer or energy absorption circuit.When skidding circuit or energy absorption circuit can not satisfy the rotation speed of fan energy changing, the switch closure in the blower fan speed controllable circuit was connected power resistor, devotes oneself to work.
Circuit advantage of the present utility model is: have a power failure if wind power generation is on-the-spot, speed controllable circuit also can utilize the electrical characteristic of self auto-closing, starts defencive function immediately; dynamic corresponding is very fast; the wind-driven generator rotating speed can be effectively controlled in the restriction of unprotect number of times, makes its emergency.
Control speed system advantage of the present utility model is: this speed controllable circuit is independent of the whole wind force generating system and controls rotation speed of fan, it is in service at wind generator system that it controls fast functional unit, rotating speed to system fan is implemented tracking and monitoring, when the wind-driven generator rotating speed surpasses maximum, speed controllable circuit works or skidding circuit and energy absorption circuit when having fault, and speed controllable circuit is also devoted oneself to work.The controller of wind generator system can adopt single-chip microcomputer or PLC, detects rotation speed of fan from motion tracking.A kind of wind turbine generator blower fan speed controllable circuit purpose is.
Description of drawings
Fig. 1 is the utility model wind turbine generator blower fan control speed system circuit block diagram, and empty frame partly is a speed controllable circuit of the present utility model among the figure.
Among the figure: 1-wind-driven generator, 2-rectification circuit, 3-skidding circuit, 4-filter circuit, 5-grid-connected inverter circuit, 6-electrical network, 7, speed controllable circuit, 7-1-switching circuit, 7-2-brake resistance.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is made specific description.
The structure of a kind of wind turbine generator blower fan of the utility model speed controllable circuit control system as shown in Figure 1, it is to be connected with the grid-connected converter circuit on the three-phase output phase line of wind-driven generator 1, the grid-connected converter circuit is made up of rectification circuit 2, skidding circuit 3, filter circuit 4 and grid-connected inverter circuit 5, and the three-phase output of grid-connected converter circuit and wind-driven generator 1 goes out the required operating voltage P+ and the P-of current transformer by rectification circuit 2 rectifications; Skidding circuit 3, filter circuit 4 and grid-connected inverter circuit 5 are connected between supply voltage P+, the P-, are transported to electrical network 6 by inverter circuit 5 then.Empty frame part speed controllable circuit 7 of the present utility model as can be seen is made up of the brake resistance 7-2 of the switching circuit 7-1 with self-locking function and certain power from figure, the end of switching circuit 7-1 and the series connection of brake resistance 7-2 one end, the other end of each resistance 7-2 is linked together, and is unsettled earth-free; The other end of switching circuit 7-1 is connected to respectively on the three-phase output line of wind-driven generator.
Under the normal speed conditions of blower fan, switch in the speed controllable circuit disconnects, speed controllable circuit does not carry out work, when control circuit implements to detect rotation speed of fan above setting range or the whole power failure in blower fan scene, switching circuit 7-1 closure, be that brake resistance circuit 7-2 devotes oneself to work, force the blower fan reduction of speed or make its emergency.
Claims (2)
1, a kind of wind turbine generator blower fan speed controllable circuit is characterized in that, described circuit is an end and the necessarily brake resistance one end series connection of power that has the switching circuit of self-locking function with, and the other end of each resistance is linked together, and is unsettled earth-free; The other end of self-locking function switching circuit is connected to respectively on the three-phase output line of wind-driven generator.
2, a kind of control speed system that contains the described blower fan speed controllable circuit of claim 1, it is to be connected with the grid-connected converter circuit on the three-phase output phase line of wind-driven generator, the grid-connected converter circuit is by rectification circuit, the skidding circuit, filter circuit, grid-connected inverter circuit is formed, be transported to electrical network by grid-connected inverter circuit then, it is characterized in that, on the three-phase output phase line of wind-driven generator, also be connected with the blower fan speed controllable circuit, described blower fan speed controllable circuit is an end and the necessarily brake resistance one end series connection of power that has the switching circuit of self-locking function with, the other end of each resistance is linked together, and is unsettled earth-free; The other end of self-locking function switching circuit is connected to respectively on the three-phase output line of wind-driven generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720159082XU CN201185403Y (en) | 2007-12-25 | 2007-12-25 | Circuit for controlling speed of wind generating set fan and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720159082XU CN201185403Y (en) | 2007-12-25 | 2007-12-25 | Circuit for controlling speed of wind generating set fan and system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201185403Y true CN201185403Y (en) | 2009-01-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720159082XU Expired - Fee Related CN201185403Y (en) | 2007-12-25 | 2007-12-25 | Circuit for controlling speed of wind generating set fan and system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201185403Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892998A (en) * | 2010-08-06 | 2010-11-24 | 广州遨控电子科技有限公司 | Direct-current frequency conversion electric fan |
| CN102223136A (en) * | 2010-04-15 | 2011-10-19 | 冬雷 | Non-energy-storing motor-driven system for complementary power supply of wind power generation and electrical network |
| CN102611136A (en) * | 2012-03-15 | 2012-07-25 | 广东明阳龙源电力电子有限公司 | Wind power generation equipment |
| CN102097993B (en) * | 2009-12-15 | 2012-10-17 | 苏州能健电气有限公司 | Wind power generation variable pitch system interlocking device |
| CN103078565A (en) * | 2012-12-25 | 2013-05-01 | 北京金风科创风电设备有限公司 | generator braking device |
| CN103797703A (en) * | 2011-07-27 | 2014-05-14 | 维斯塔斯风力系统集团公司 | A power dissipating arrangement in a wind turbine |
| CN104242785A (en) * | 2013-06-12 | 2014-12-24 | 洛克威尔自动控制技术股份有限公司 | Powe conversion system and METHOD FOR OVERVOLTAGE PROTECTION AND REVERSE MOTOR SPEED CONTROL |
-
2007
- 2007-12-25 CN CNU200720159082XU patent/CN201185403Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097993B (en) * | 2009-12-15 | 2012-10-17 | 苏州能健电气有限公司 | Wind power generation variable pitch system interlocking device |
| CN102223136A (en) * | 2010-04-15 | 2011-10-19 | 冬雷 | Non-energy-storing motor-driven system for complementary power supply of wind power generation and electrical network |
| CN101892998A (en) * | 2010-08-06 | 2010-11-24 | 广州遨控电子科技有限公司 | Direct-current frequency conversion electric fan |
| CN103797703A (en) * | 2011-07-27 | 2014-05-14 | 维斯塔斯风力系统集团公司 | A power dissipating arrangement in a wind turbine |
| CN102611136A (en) * | 2012-03-15 | 2012-07-25 | 广东明阳龙源电力电子有限公司 | Wind power generation equipment |
| CN103078565A (en) * | 2012-12-25 | 2013-05-01 | 北京金风科创风电设备有限公司 | generator braking device |
| CN103078565B (en) * | 2012-12-25 | 2016-02-03 | 北京金风科创风电设备有限公司 | generator braking device |
| CN104242785A (en) * | 2013-06-12 | 2014-12-24 | 洛克威尔自动控制技术股份有限公司 | Powe conversion system and METHOD FOR OVERVOLTAGE PROTECTION AND REVERSE MOTOR SPEED CONTROL |
| CN104242785B (en) * | 2013-06-12 | 2017-07-04 | 洛克威尔自动控制技术股份有限公司 | The method that power conversion system is controlled with overvoltage protection and reverse electromotor velocity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090121 Termination date: 20131225 |