CN112412699A - Power control method applied to wind generating set - Google Patents
Power control method applied to wind generating set Download PDFInfo
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- CN112412699A CN112412699A CN202011291675.8A CN202011291675A CN112412699A CN 112412699 A CN112412699 A CN 112412699A CN 202011291675 A CN202011291675 A CN 202011291675A CN 112412699 A CN112412699 A CN 112412699A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008859 change Effects 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000013178 mathematical model Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 claims description 4
- 238000011426 transformation method Methods 0.000 claims description 3
- 238000004451 qualitative analysis Methods 0.000 claims description 2
- 238000004445 quantitative analysis Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0204—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/007—Control circuits for doubly fed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a power control method applied to a wind generating set, which relates to the technical field of wind power generation, and is used for adjusting and controlling three aspects of the wind generating set, including variable pitch control of the wind generating set, yaw control of the wind generating set and generator parameter control of the wind generating set; the blade of the variable-pitch generator can be subjected to angle adjustment in the operation process by controlling the variable pitch of the wind generating set; the yaw control system is used for tracking the change of the wind direction; the power of the generator of the wind generating set is adjusted by controlling the generator parameters of the wind generating set. The power control method applied to the wind generating set increases the flexibility of a transmission system of the wind generating set aiming at different wind power, analyzes and controls the parameter information of the generator, tracks the optimal power curve and enables the wind generating set to have higher wind energy conversion efficiency.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a power control method applied to a wind generating set.
Background
The principle of the wind power generation technology is to use a wind power generator to convert wind energy into electric energy. Nowadays, with the continuous expansion of the application range of the wind power generation technology, the wind power generation technology also tends to be perfect gradually and is applied more widely. The main advantages of using wind power for power generation are: small occupied area, sufficient storage capacity and the like. At present, although the cost of wind power generation is slightly lower than that of solar power generation, the cost is much higher than that of traditional thermal power generation, so how to control the cost of wind power generation is an important problem at present, and power control in wind power generation is also a core technology.
In the prior art, power control in wind power generation is often incomplete, structural property transformation is only performed on a certain link, or the output power of a wind generating set is dynamically adjusted, so that the conversion rate of the wind generating set is not high, and sufficient utilization of wind energy is difficult to achieve.
Therefore, a power control method applied to the wind generating set is provided, so that the wind generating set has high wind energy conversion efficiency.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a power control method applied to a wind generating set, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a power control method applied to a wind generating set adjusts and controls three aspects of the wind generating set, including variable pitch control of the wind generating set, yaw control of the wind generating set and generator parameter control of the wind generating set;
the variable pitch control of the wind generating set is characterized in that the connection mode of the blades and the hub of the variable pitch generator is non-rigid connection, the blades of the variable pitch generator can be subjected to angle adjustment in the operation process, and the blades can adjust the angle between the blades and the hub according to the wind speed, so that the wind generating set can keep a good wind taking angle;
the yaw control system is used for tracking the change of the wind direction and driving the engine room to rotate around the center line of the tower when the wind generating set works normally and wind is taken, so that the swept surface of the wind wheel is kept vertical to the wind direction, the wind wheel is ensured to keep the optimal wind taking state all the time, the loss of wind energy is reduced, and the effective working time is prolonged;
the double-fed asynchronous wind driven generator can adjust the power of the generator according to the size of wind power, so that the wind driven generator can maintain a good operation state, and meanwhile, a control console of the wind driven generator controls feed-in current parameters, so that the good working state of the wind driven generator is maintained.
According to the technical scheme, the pitch control of the wind generating set is further optimized, when the wind generating set starts to operate, the control console of the wind generating set adjusts the angle of the pitch to 45 degrees, when the operating speed of the wind generating set reaches a preset initial value, the control console of the wind generating set adjusts the angle of the pitch to 0 degree, and grid-connected power generation is carried out according to the rated rotating speed of the wind generating set.
According to the technical scheme, the pitch control of the wind generating set is further optimized, when the wind power is too large, a control console of the wind generating set controls according to a power feedback signal of the wind generating set, and the pitch angle of the blade rotates towards the direction that the windward area is reduced, otherwise, the blade rotates towards the direction that the windward area is increased.
The technical scheme is further optimized, the yaw control of the wind generating set is realized, the control console of the wind generating set adopts an OptiP technology, the slip ratio of the generator is adjusted according to the wind speed, the rotation state of the set is coordinated, the operation state of the set is always maintained at the optimal tip speed ratio, and the output power of the wind generating set is ensured.
Further optimize this technical scheme, wind generating set's yaw control, based on the safety protection consideration, still can be used to untie the cable, can prevent to make inside cable pass through the winding and damage when rotating according to the wind direction at the host computer room, if the cable suffers the winding, then when the host computer room next time rotates, according to the cable winding condition, the host computer room will rotate to opposite direction for on being replied to original position by the winding cable again.
The technical scheme is further optimized, the generator parameters of the wind generating set are controlled, a control console of the wind generating set compares the relation between actual physical quantities of a stator and a rotor and creates a mathematical model through qualitative and quantitative analysis of an equivalent circuit of the double-fed asynchronous wind generating set, a static coordinate system is established, the mathematical model is transformed by adopting a coordinate transformation method, and the feed-in current control of the double-fed asynchronous wind generating set is realized.
Compared with the prior art, the invention provides a power control method applied to a wind generating set, which has the following beneficial effects:
according to the power control method applied to the wind generating set, the power control of the wind generating set is improved in three aspects of variable pitch control of the wind generating set, yaw control of the wind generating set and generator parameter control of the wind generating set, the flexibility of a transmission system is increased for the wind generating set according to different wind power, parameter information of a generator is analyzed and controlled, an optimal power curve is tracked, and the wind generating set has high wind energy conversion efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a power control method applied to a wind turbine generator system according to the present invention;
fig. 2 is a schematic diagram of a specific adjustment of a wind turbine generator system applied to a power control method of the wind turbine generator system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-2, a power control method applied to a wind turbine generator system adjusts and controls three aspects of the wind turbine generator system, including pitch control of the wind turbine generator system, yaw control of the wind turbine generator system, and generator parameter control of the wind turbine generator system;
the variable pitch control of the wind generating set is characterized in that the connection mode of the blades and the hub of the variable pitch generator is non-rigid connection, the blades of the variable pitch generator can be subjected to angle adjustment in the operation process, and the blades can adjust the angle between the blades and the hub according to the wind speed, so that the wind generating set can keep a good wind taking angle;
the yaw control system is used for tracking the change of the wind direction and driving the engine room to rotate around the center line of the tower when the wind generating set works normally and wind is taken, so that the swept surface of the wind wheel is kept vertical to the wind direction, the wind wheel is ensured to keep the optimal wind taking state all the time, the loss of wind energy is reduced, and the effective working time is prolonged;
the double-fed asynchronous wind driven generator can adjust the power of the generator according to the size of wind power, so that the wind driven generator can maintain a good operation state, and meanwhile, a control console of the wind driven generator controls feed-in current parameters, so that the good working state of the wind driven generator is maintained.
As an embodiment of this embodiment, in the pitch control of the wind generating set, when the wind generating set starts to operate, the console of the wind generating set adjusts the pitch angle to 45 °, and when the operating speed of the wind generating set reaches a preset initial value, the console of the wind generating set adjusts the pitch angle to 0 °, and grid-connected power generation is performed according to the rated rotational speed of the wind generating set.
In an embodiment of the present invention, in the pitch control of the wind turbine generator system, when the wind power is too large, the console of the wind turbine generator system controls the pitch angle of the blades according to the power feedback signal of the wind turbine generator system, and the pitch angle of the blades rotates in a direction in which the windward area decreases, and conversely, rotates in a direction in which the windward area increases.
As an implementation manner of this embodiment, in the yaw control of the wind turbine generator system, the console of the wind turbine generator system adopts the optip technology, adjusts the slip ratio of the generator according to the magnitude of the wind speed, coordinates the rotation state of the wind turbine generator, and maintains the operation state at the optimal tip speed ratio all the time to ensure the output power of the wind turbine generator system.
As an implementation manner of this embodiment, in the generator parameter control of the wind generating set, a console of the wind generating set compares relationships between actual physical quantities of a stator and a rotor and creates a mathematical model by qualitatively and quantitatively analyzing an equivalent circuit of the doubly-fed asynchronous wind generator, establishes a stationary coordinate system, and modifies the mathematical model by using a coordinate transformation method to realize feed-in current control of the doubly-fed asynchronous wind generator.
Example two:
a power control method applied to a wind generating set adjusts and controls three aspects of the wind generating set, including variable pitch control of the wind generating set, yaw control of the wind generating set and generator parameter control of the wind generating set;
the variable pitch control of the wind generating set is characterized in that the connection mode of the blades and the hub of the variable pitch generator is non-rigid connection, the blades of the variable pitch generator can be subjected to angle adjustment in the operation process, and the blades can adjust the angle between the blades and the hub according to the wind speed, so that the wind generating set can keep a good wind taking angle;
the yaw control system is used for tracking the change of the wind direction and driving the engine room to rotate around the center line of the tower when the wind generating set works normally and wind is taken, so that the swept surface of the wind wheel is kept vertical to the wind direction, the wind wheel is ensured to keep the optimal wind taking state all the time, the loss of wind energy is reduced, and the effective working time is prolonged;
the double-fed asynchronous wind driven generator can adjust the power of the generator according to the size of wind power, so that the wind driven generator can maintain a good operation state, and meanwhile, a control console of the wind driven generator controls feed-in current parameters, so that the good working state of the wind driven generator is maintained.
As an embodiment of this embodiment, the yaw control of the wind turbine generator system may be further used for untwisting based on safety protection, which may prevent the cable inside the main room from being damaged by being wound when the main room rotates according to the wind direction.
The invention has the beneficial effects that: according to the power control method applied to the wind generating set, the power control of the wind generating set is improved in three aspects of variable pitch control of the wind generating set, yaw control of the wind generating set and generator parameter control of the wind generating set, the flexibility of a transmission system is increased for the wind generating set according to different wind power, parameter information of a generator is analyzed and controlled, an optimal power curve is tracked, and the wind generating set has high wind energy conversion efficiency.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A power control method applied to a wind generating set adjusts and controls three aspects of the wind generating set, and is characterized by comprising the steps of controlling the variable pitch of the wind generating set, controlling the yaw of the wind generating set and controlling the generator parameters of the wind generating set;
the variable pitch control of the wind generating set is characterized in that the connection mode of the blades and the hub of the variable pitch generator is non-rigid connection, the blades of the variable pitch generator can be subjected to angle adjustment in the operation process, and the blades can adjust the angle between the blades and the hub according to the wind speed, so that the wind generating set can keep a good wind taking angle;
the yaw control system is used for tracking the change of the wind direction and driving the engine room to rotate around the center line of the tower when the wind generating set works normally and wind is taken, so that the swept surface of the wind wheel is kept vertical to the wind direction, the wind wheel is ensured to keep the optimal wind taking state all the time, the loss of wind energy is reduced, and the effective working time is prolonged;
the double-fed asynchronous wind driven generator can adjust the power of the generator according to the size of wind power, so that the wind driven generator can maintain a good operation state, and meanwhile, a control console of the wind driven generator controls feed-in current parameters, so that the good working state of the wind driven generator is maintained.
2. The power control method applied to the wind generating set according to claim 1, wherein in the pitch control of the wind generating set, when the wind generating set starts to operate, the console of the wind generating set adjusts the angle of the pitch to 45 °, when the operating speed of the wind generating set reaches a preset initial value, the console of the wind generating set adjusts the angle of the pitch to 0 °, and the wind generating set is connected to the grid for generating power according to the rated rotating speed of the wind generating set.
3. The power control method for the wind generating set according to claim 1, wherein the pitch control of the wind generating set is that when the wind is too large, the console of the wind generating set is controlled according to the power feedback signal of the wind generating set, and the pitch angle of the blade rotates in the direction of the decreasing windward area, and vice versa.
4. The power control method applied to the wind generating set according to claim 1, wherein the yaw control of the wind generating set, the console of the wind generating set adopts optip technology, the slip ratio of the generator is adjusted according to the wind speed, the rotation state of the set is coordinated, the operation state is always maintained at the optimal tip speed ratio, and the output power of the wind generating set is ensured.
5. The power control method of claim 1, wherein the yaw control of the wind power generator is further used for untwisting the cable based on safety protection, so as to prevent the cable inside the main room from being damaged by being wound when the main room rotates according to the wind direction, and if the cable is wound, the main room rotates in the opposite direction according to the winding condition of the cable when the main room rotates next time, so that the wound cable is restored to the original position.
6. The power control method applied to the wind generating set according to claim 1, wherein for generator parameter control of the wind generating set, a control console of the wind generating set compares the relation between actual physical quantities of a stator and a rotor and creates a mathematical model through qualitative and quantitative analysis of an equivalent circuit of the doubly-fed asynchronous wind generator, establishes a static coordinate system, and modifies the mathematical model by adopting a coordinate transformation method to realize feed-in current control of the doubly-fed asynchronous wind generator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011291675.8A CN112412699A (en) | 2020-11-18 | 2020-11-18 | Power control method applied to wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011291675.8A CN112412699A (en) | 2020-11-18 | 2020-11-18 | Power control method applied to wind generating set |
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| CN112412699A true CN112412699A (en) | 2021-02-26 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916446A (en) * | 2012-11-09 | 2013-02-06 | 南京飓能电控自动化设备制造有限公司 | Electric control system of asynchronous wind generating set |
| CN106150900A (en) * | 2016-06-30 | 2016-11-23 | 华仪风能有限公司 | Double-fed asynchronous wind generator system and operation method thereof |
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2020
- 2020-11-18 CN CN202011291675.8A patent/CN112412699A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916446A (en) * | 2012-11-09 | 2013-02-06 | 南京飓能电控自动化设备制造有限公司 | Electric control system of asynchronous wind generating set |
| CN106150900A (en) * | 2016-06-30 | 2016-11-23 | 华仪风能有限公司 | Double-fed asynchronous wind generator system and operation method thereof |
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