CN116498506A - Wind generating set rotating speed control method and system based on self-contained blade icing monitoring - Google Patents

Wind generating set rotating speed control method and system based on self-contained blade icing monitoring Download PDF

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Publication number
CN116498506A
CN116498506A CN202310609814.4A CN202310609814A CN116498506A CN 116498506 A CN116498506 A CN 116498506A CN 202310609814 A CN202310609814 A CN 202310609814A CN 116498506 A CN116498506 A CN 116498506A
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CN
China
Prior art keywords
icing
blade
degree
thickness
acceleration
Prior art date
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Pending
Application number
CN202310609814.4A
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Chinese (zh)
Inventor
金强
耿杰
文军
谭光道
徐超
孟秀俊
蔡春辉
汪德军
胡辉
付荣方
周世银
詹彪
朱玉瑞
孟鹏飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huaneng Hezhang Wind Power Co ltd
Huaneng Clean Energy Research Institute
China Huaneng Group Co Ltd
Original Assignee
Huaneng Hezhang Wind Power Co ltd
Huaneng Clean Energy Research Institute
China Huaneng Group Co Ltd
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Publication date
Application filed by Huaneng Hezhang Wind Power Co ltd, Huaneng Clean Energy Research Institute, China Huaneng Group Co Ltd filed Critical Huaneng Hezhang Wind Power Co ltd
Priority to CN202310609814.4A priority Critical patent/CN116498506A/en
Publication of CN116498506A publication Critical patent/CN116498506A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/40—Ice detection; De-icing means
    • 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
    • F03D7/0264—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for stopping; controlling in emergency situations
    • 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
    • F03D7/0276—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
    • 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
    • F03D7/04—Automatic control; Regulation
    • F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
    • 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)
  • Wind Motors (AREA)

Abstract

The invention discloses a wind generating set rotating speed control method and system based on self-contained blade icing monitoring, comprising the following steps: receiving state data transmitted by a blade icing sensor, and acquiring the icing thickness of the blade; based on the icing thickness of the blade, acquiring the icing degree of the blade; judging whether the icing degree of the blade is heavy icing, if so, acquiring the rotating speed of the generator based on the icing degree of the blade; if the icing is heavy, stopping the wind generating set for protection; if the severe icing range is exceeded, the operation logic is terminated; acquiring cabin acceleration based on cabin front-rear acceleration and cabin left-right acceleration; judging whether the cabin acceleration is larger than a preset cabin acceleration threshold value, if so, stopping the wind generating set for protection; if not, the run logic terminates. According to the invention, the icing condition of the blade is monitored through the blade icing sensor, the rotating speed of the generator is matched, and the generator runs at a reduced speed with ice on the premise of ensuring the safety of the area nearby the unit, so that the generating income is improved.

Description

Wind generating set rotating speed control method and system based on self-contained blade icing monitoring
Technical Field
The invention belongs to the technical field of wind generating sets, and relates to a wind generating set rotating speed control method and system based on self-contained blade icing monitoring.
Background
As wind power generation is increasingly installed on different terrains and under different environmental conditions, various losses of wind power generation sets caused by blade icing have become a problem to be solved by power generation operators. Blade icing causes the impeller to rotate out of balance, creating detrimental vibration and loading. Icing falls can pose a serious hazard to personal and property in surrounding areas. Blade icing can reduce the aerodynamic performance of the blade and thus affect the unit output. Therefore, the icing of the blades of the wind turbine generator can seriously affect the operation safety and the power generation benefit of the wind power plant.
The traditional wind generating set does not monitor whether the blades are frozen or not through software and hardware, and broken ice blocks or dropped ice cubes thrown out during the operation of the fan can hurt people or things nearby the fan. Related software and hardware are currently available for icing monitoring, such as by adding ice coating sensors. On the one hand, if some ice coating sensors are powered by solar energy, when the local weather environment is in a overcast or rainy day or a foggy day, the sensors cannot obtain effective energy supply and cannot continuously monitor ice coating. On the other hand, when the icing sensor monitors that the blade is frozen, the control system is informed to carry out shutdown protection, and considerable electric quantity loss is caused at the moment. In some special wide terrains or special requirements of power generation operators, the blade ice power generation mode needs to operate to ensure certain power generation benefits on the premise of ensuring safety.
Disclosure of Invention
The invention aims to solve the problem that the running safety of the unit with ice and the certain generating benefit can not be guaranteed in the prior art, and provides a wind generating set rotating speed control method and system based on self-contained blade icing monitoring.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a wind generating set rotating speed control method based on self-contained blade icing monitoring comprises the following steps:
receiving state data transmitted by a blade icing sensor, and acquiring the icing thickness of the blade;
based on the icing thickness of the blade, acquiring the icing degree of the blade;
judging whether the icing degree of the blade is heavy icing, if so, acquiring the rotating speed of the generator based on the icing degree of the blade; if the icing is heavy, stopping the wind generating set for protection; if the severe icing range is exceeded, the operation logic is terminated;
acquiring the front and rear acceleration of the engine room and the left and right acceleration of the engine room, and acquiring the acceleration of the engine room based on the front and rear acceleration of the engine room and the left and right acceleration of the engine room;
judging whether the cabin acceleration is larger than a preset cabin acceleration threshold value, if so, stopping the wind generating set for protection; if not, the run logic terminates.
The invention further improves that:
further, before receiving the status data transmitted by the blade icing sensor, the method further comprises: and judging whether the electric quantity of the spare battery of the blade icing sensor is sufficient, and if the electric quantity is lower than 10%, carrying out illumination charging to 100%.
Further, state data transmitted by the blade icing sensor is received, and the icing thickness of the blade is obtained, specifically: the status data includes: wind speed information, fan normal power and icing power matched with the wind speed information; judging whether the blade icing sensor works normally or not, if so, sending a fault signal to a main control PLC, performing wind speed power matching calculation by the main control PLC, and obtaining the icing thickness of the blade surface through the wind speed power matching degree, and if so, sending the icing thickness of the blade surface to the main control PLC; the wind speed power matching is specifically as follows: and the main control PLC estimates the icing thickness based on the normal power and the icing power of the fan matched with the wind speed information.
Further, based on the icing thickness of the blade, the icing degree of the blade is obtained, specifically: setting a plurality of icing thresholds which are sequentially arranged from small to large; judging whether the blade deicing system is started or not, if not, judging whether the blade icing thickness is larger than a set minimum icing threshold, and if not, indicating that the surface of the blade is not frozen; and if the icing threshold interval is exceeded, acquiring the icing degree of the blade according to the icing thickness of the blade.
Further, the plurality of icing thresholds are Threshold0, threshold1 and Threshold2; threshold0, threshold1 and Threshold2 are arranged in sequence from small to large; if the icing thickness of the blade does not exceed Threshold0, the surface of the blade is not frozen, and the icing degree state=0 of the blade;
if the icing thickness of the blade exceeds Threshold0 but does not exceed Threshold1, icing starts to occur on the surface of the blade, and the icing degree state=1 of the blade;
if the icing thickness of the blade exceeds Threshold1 but does not exceed Threshold2, slightly icing the surface of the blade, and enabling the icing degree state of the blade to be=2;
if the blade icing thickness exceeds Threshold2, the blade surface is severely iced, and the blade icing degree state=3.
Further, based on the blade icing thickness, the degree of blade icing is obtained, and further includes: setting a plurality of icing thresholds again, and arranging the icing thresholds from small to large; judging whether the blade deicing system is started or not, if so, judging whether the blade icing thickness is larger than a set minimum icing threshold, and if not, indicating that the surface of the blade is not frozen; and if the icing threshold interval is exceeded, acquiring the icing degree of the blade according to the icing thickness of the blade.
Further, setting a plurality of icing thresholds again is as follows: threshold3, threshold4, and Threshold5; the Threshold3, the Threshold4 and the Threshold5 are sequentially arranged from small to large; if the icing thickness of the blade does not exceed Threshold3, the surface of the blade is not frozen, and the icing degree state=4;
if the icing thickness of the blade exceeds Threshold3 but does not exceed Threshold4, the surface of the blade starts to be frozen, and the icing degree state=5;
if the icing thickness of the blade exceeds Threshold4 but does not exceed Threshold5, slightly icing the surface of the blade, and enabling the icing degree of the blade to be state=6;
if the blade icing thickness exceeds Threshold5, the blade surface is severely iced, and the blade icing degree state=7.
Further, judging whether the icing degree of the blade is heavy icing, and if the icing degree of the blade is smaller than the heavy icing degree, acquiring the rotating speed of the generator based on the icing degree of the blade; if the icing is heavy, stopping the wind generating set for protection; if the severe icing range is exceeded, the operation logic is terminated; the method comprises the following steps:
if the icing degree state of the blade is 0, the rotating speed of the generator is operated at a rated rotating speed omega;
if the icing degree state of the blade is 1, the rotation speed of the generator is reduced by an operation coefficient R1, and the rotation speed of the generator is operated at a rated rotation speed omega R1;
if the icing degree state of the blade is 2, the rotation speed of the generator is reduced by an operation coefficient R2, and the rotation speed of the generator is operated at a rated rotation speed omega R2;
if the icing degree state of the blade is 3, stopping the wind generating set for protection;
if the icing degree state of the blade is 4, the rotating speed of the generator is operated at a rated rotating speed omega;
if the icing degree state of the blade is 5, acquiring a generator rotation speed reduction operation coefficient R3, and operating the generator at a rated rotation speed omega R3;
if the icing degree state of the blade is 6, acquiring a generator rotation speed reduction operation coefficient R4, and operating the generator at a rated rotation speed omega R4;
if the icing degree state of the blade is 7, stopping the wind generating set for protection;
if the blade icing level state is not 7, the operation logic is terminated.
Further, the cabin front-rear acceleration and the cabin left-right acceleration are obtained, and the cabin acceleration is obtained based on the cabin front-rear acceleration and the cabin left-right acceleration, specifically: cabin front-rear acceleration Naccfa, cabin left-right acceleration Naccss, and cabin acceleration is:
wind generating set rotational speed control system based on self-contained blade icing monitoring includes:
the receiving module is used for receiving the state data transmitted by the blade icing sensor and acquiring the icing thickness of the blade;
the first acquisition module acquires the icing degree of the blade based on the icing thickness of the blade;
the first judging module judges whether the icing degree of the blade is heavy icing or not, and if the icing degree of the blade is smaller than the heavy icing degree, the rotating speed of the generator is obtained based on the icing degree of the blade; if the icing is heavy, stopping the wind generating set for protection; if the severe icing range is exceeded, the operation logic is terminated;
the second acquisition module acquires the cabin front-rear acceleration and the cabin left-right acceleration, and acquires the cabin acceleration based on the cabin front-rear acceleration and the cabin left-right acceleration;
the second judging module judges whether the cabin acceleration is larger than a preset cabin acceleration threshold value or not, and if yes, the wind turbine generator system stops for protection; if not, the run logic terminates.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the icing condition of the blade is monitored through the blade icing sensor, the blade is judged to be matched with the rotating speed of the generator according to the icing condition according to the icing thickness of the blade, and the generator is operated at a reduced speed with ice on the premise of ensuring the safety of the area nearby the unit, so that the generating income is improved.
Furthermore, the invention adopts the mode of blade icing monitoring and generator rotating speed direct control, and the normal power generation operation is ensured on the premise of ensuring the safety of the machine set and the surrounding environment, thereby increasing the power generation income. According to the invention, through the rotation speed control of the wind generating set, the ice falling safety distance of the peripheral blades of the set can be formulated by combining the ice covering condition of the blades.
Furthermore, the invention adopts two modes, namely the deicing system works and does not work, and the safety distance of the unit with ice is ensured by setting different trigger thresholds and rotation speed reduction target values and combining the icing and deicing conditions of the blades.
Furthermore, the invention has wide application prospect in open areas such as deserts, mountain areas, grasslands and the like. According to the invention, the ice covering condition of the blade and the running rotating speed of the unit are directly controlled in a correlated way, so that the ice falling distance is ensured to be within a safe range, and the situation that the ice falling distance cannot be effectively controlled due to the higher running rotating speed under the severe ice covering condition is avoided.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for controlling rotational speed of a wind turbine generator set based on self-contained blade icing monitoring according to the present invention;
FIG. 2 is a schematic diagram of a wind turbine generator system rotational speed control system based on self-contained blade icing monitoring according to the present invention;
FIG. 3 is a flow chart for determining the icing level of a blade surface when the blade de-icing system is in an unopened state;
FIG. 4 is a flow chart for determining the icing level of a blade surface when the blade de-icing system is in an on state;
FIG. 5 is a schematic view of blade icing condition and nacelle acceleration determination.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, the invention discloses a wind generating set rotating speed control method based on self-contained blade icing monitoring, which comprises the following steps:
s101, receiving state data transmitted by the blade icing sensor, and acquiring the icing thickness of the blade.
Before receiving the status data transmitted by the blade icing sensor, the method further comprises: and judging whether the electric quantity of the spare battery of the blade icing sensor is sufficient, and if the electric quantity is lower than 10%, carrying out illumination charging to 100%.
The status data includes: wind speed information, fan normal power and icing power matched with the wind speed information; judging whether the blade icing sensor works normally or not, if so, sending a fault signal to a main control PLC, performing wind speed power matching calculation by the main control PLC, and obtaining the icing thickness of the blade surface through the wind speed power matching degree, and if so, sending the icing thickness of the blade surface to the main control PLC; the wind speed power matching is specifically as follows: and the main control PLC estimates the icing thickness based on the normal power and the icing power of the fan matched with the wind speed information.
S102, based on the icing thickness of the blade, acquiring the icing degree of the blade;
setting a plurality of icing thresholds which are sequentially arranged from small to large; judging whether the blade deicing system is started or not, if not, judging whether the blade icing thickness is larger than a set minimum icing threshold, and if not, indicating that the surface of the blade is not frozen; and if the icing threshold interval is exceeded, acquiring the icing degree of the blade according to the icing thickness of the blade.
The icing thresholds are Threshold0, threshold1 and Threshold2; the Threshold0, the Threshold1 and the Threshold2 are sequentially arranged from small to large; if the icing thickness of the blade does not exceed Threshold0, the surface of the blade is not frozen, and the icing degree state=0 of the blade;
if the icing thickness of the blade exceeds Threshold0 but does not exceed Threshold1, icing starts to occur on the surface of the blade, and the icing degree state=1 of the blade;
if the icing thickness of the blade exceeds Threshold1 but does not exceed Threshold2, slightly icing the surface of the blade, and enabling the icing degree state of the blade to be=2;
if the blade icing thickness exceeds Threshold2, the blade surface is severely iced, and the blade icing degree state=3.
Based on the blade icing thickness, acquire the degree that the blade was frozen, still include: setting a plurality of icing thresholds again, wherein the icing thresholds which are set again are arranged in sequence from small to large; judging whether the blade deicing system is started or not, if so, judging whether the blade icing thickness is larger than a set minimum icing threshold, and if not, indicating that the surface of the blade is not frozen; and if the icing threshold interval is exceeded, acquiring the icing degree of the blade according to the icing thickness of the blade.
Setting a plurality of icing thresholds again as follows: threshold3, threshold4, and Threshold5; the Threshold3, the Threshold4 and the Threshold5 are sequentially arranged from small to large; if the icing thickness of the blade does not exceed Threshold3, the surface of the blade is not frozen, and the icing degree state=4;
if the icing thickness of the blade exceeds Threshold3 but does not exceed Threshold4, the surface of the blade starts to be frozen, and the icing degree state=5;
if the icing thickness of the blade exceeds Threshold4 but does not exceed Threshold5, slightly icing the surface of the blade, and enabling the icing degree of the blade to be state=6;
if the blade icing thickness exceeds Threshold5, the blade surface is severely iced, and the blade icing degree state=7.
S103, judging whether the icing degree of the blade is heavy icing, if so, acquiring the rotating speed of the generator based on the icing degree of the blade; if the icing is heavy, stopping the wind generating set for protection; if the severe icing range is exceeded, the operating logic terminates.
If the icing degree state of the blade is 0, the rotating speed of the generator is operated at a rated rotating speed omega;
if the icing degree state of the blade is 1, the rotation speed of the generator is reduced by an operation coefficient R1, and the rotation speed of the generator is operated at a rated rotation speed omega R1;
if the icing degree state of the blade is 2, the rotation speed of the generator is reduced by an operation coefficient R2, and the rotation speed of the generator is operated at a rated rotation speed omega R2;
if the icing degree state of the blade is 3, stopping the wind generating set for protection;
if the icing degree state of the blade is 4, the rotating speed of the generator is operated at a rated rotating speed omega;
if the icing degree state of the blade is 5, acquiring a generator rotation speed reduction operation coefficient R3, and operating the generator at a rated rotation speed omega R3;
if the icing degree state of the blade is 6, acquiring a generator rotation speed reduction operation coefficient R4, and operating the generator at a rated rotation speed omega R4;
if the icing degree state of the blade is 7, stopping the wind generating set for protection;
if the blade icing level state is not 7, the operation logic is terminated.
S104, acquiring the front and rear acceleration of the engine room and the left and right acceleration of the engine room, and acquiring the acceleration of the engine room based on the front and rear acceleration of the engine room and the left and right acceleration of the engine room.
Cabin front-rear acceleration Naccfa, cabin left-right acceleration Naccss, and cabin acceleration is:
s105, judging whether the cabin acceleration is larger than a preset cabin acceleration threshold value, if so, stopping the wind generating set for protection; if not, the run logic terminates.
Referring to fig. 2, the invention discloses a wind generating set rotation speed control system based on self-contained blade icing monitoring, which comprises:
the receiving module is used for receiving the state data transmitted by the blade icing sensor and acquiring the icing thickness of the blade;
the first acquisition module acquires the icing degree of the blade based on the icing thickness of the blade;
the first judging module judges whether the icing degree of the blade is heavy icing or not, and if the icing degree of the blade is smaller than the heavy icing degree, the rotating speed of the generator is obtained based on the icing degree of the blade; if the icing is heavy, stopping the wind generating set for protection; if the severe icing range is exceeded, the operation logic is terminated;
the second acquisition module acquires the cabin front-rear acceleration and the cabin left-right acceleration, and acquires the cabin acceleration based on the cabin front-rear acceleration and the cabin left-right acceleration;
the second judging module judges whether the cabin acceleration is larger than a preset cabin acceleration threshold value or not, and if yes, the wind turbine generator system stops for protection; if not, the run logic terminates.
Examples:
the first step: judging whether the electric quantity of the spare battery of the blade icing sensor is sufficient, and if the electric quantity is lower than 10%, continuing to charge the spare battery to 100% by illumination;
and a second step of: judging whether the blade icing sensor works normally or not, if so, sending a fault signal to a main control PLC, performing wind speed power matching calculation by the main control PLC, calculating the icing thickness of the blade surface according to the wind speed power matching degree, and if so, sending the icing thickness of the blade surface to the main control PLC;
and the main control PLC estimates the icing thickness based on the normal power and the icing power of the fan matched with the wind speed information. Referring specifically to Table 1, table 1 shows wind speed information, fan normal power, icing power and estimated icing thickness matched with the wind speed information
TABLE 1
Wind speed Normal power Ice coating power Estimating ice coating thickness
3 meters per second 200 kilowatts 100 kilowatts 5 mm
5 meters per second 600 kilowatts 300 kilowatts 5 mm
7 meters per second 800 kilowatts 400 kw 5 mm
9 meters per second 1000 kilowatts 500 kw 5 mm
11 meters per second 1500 kilowatts 750 kw 5 mm
And a third step of: referring to FIG. 3, a determination is made as to whether the blade de-icing system is on;
fourth step: if the device is not opened, monitoring the icing condition of the blade through the blade icing sensor, wherein the icing thickness detection value is T;
fifth step: acquiring the icing thickness of the blade surface and setting a judgment Threshold value Threshold0;
sixth step: judging whether the icing thickness T of the blade surface is greater than Threshold0 or not;
seventh step: if T is less than or equal to Threshold0, the surface of the blade is not frozen, and state=0;
eighth step: if T is greater than Threshold0, acquiring the icing thickness of the blade surface and setting a judgment Threshold1;
ninth step: judging whether the icing thickness T of the blade surface is greater than Threshold1 or not;
tenth step: if T is less than or equal to Threshold1, icing begins to occur on the blade surface, state=1;
eleventh step: if T is greater than Threshold1, acquiring the icing thickness of the blade surface and setting a judgment Threshold2;
twelfth step: judging whether the icing thickness T of the blade surface is greater than Threshold2 or not;
thirteenth step: if T is less than or equal to Threshold2, the surface of the blade is slightly frozen, and state=2;
fourteenth step: if T is greater than Threshold2, the blade surface is severely iced, state=3;
fifteenth step: referring to fig. 4, if the blade deicing system is turned on, the blade icing condition is monitored by the blade icing sensor, and the icing thickness detection value is T;
sixteenth step: acquiring the icing thickness of the blade surface and setting a judgment Threshold value Threshold3;
seventeenth step: judging whether the icing thickness T of the blade surface is greater than Threshold3 or not;
eighteenth step: if T is less than or equal to Threshold3, indicating that the blade surface is not frozen, state=4;
nineteenth step: if T is greater than Threshold0, acquiring the icing thickness of the blade surface and setting a judgment Threshold4;
twenty-step: judging whether the icing thickness T of the blade surface is greater than Threshold4 or not;
twenty-first step: if T is less than or equal to Threshold4, icing starts to appear on the surface of the blade, and state=5;
twenty-second step: acquiring the icing thickness of the blade surface and setting a judgment Threshold value Threshold5;
twenty-third step: judging whether the icing thickness T of the blade surface is greater than Threshold5 or not;
twenty-fourth step: if T is less than or equal to Threshold5, the surface of the blade is slightly frozen, and state=6;
twenty-fifth step: if T is greater than Threshold5, the blade surface is severely iced, state=7;
twenty-sixth step: referring to fig. 5, according to the blade icing condition state obtained in the previous step, judging whether the blade icing condition state is equal to 0 or not;
twenty-seventh step: if state is equal to 0, the generator speed is operated at a nominal speed omega;
twenty eighth step: if the state is not equal to 0, judging whether the icing state of the blade is equal to 1;
twenty-ninth step: if the state is equal to 1, the generator is reduced in rotating speed operation coefficient R1, and the generator is operated at rated rotating speed omega R1;
thirty-step: if the state is not equal to 1, judging whether the icing state of the blade is equal to 2;
thirty-first step: if the state is equal to 2, the generator reduces the rotating speed operation coefficient R2, and the generator rotates at the rated rotating speed omega R2;
thirty-second step: if the state is not equal to 2, judging whether the icing state of the blade is equal to 3;
thirty-third step: if the state is equal to 3, the wind generating set is stopped for protection;
thirty-fourth step: if the state is not equal to 3, judging whether the icing state of the blade is equal to 4;
thirty-fifth step: if state is equal to 4, the generator speed is operated at nominal speed omega;
thirty-sixth step: if the state is not equal to 4, judging whether the icing state of the blade is equal to 5;
thirty-seventh step: if the state is equal to 5, acquiring a generator rotation speed reduction operation coefficient R3, and operating the generator at a rated rotation speed omega R3;
thirty-eighth step: if the state is not equal to 5, judging whether the icing state of the blade is equal to 6;
thirty-ninth step: if the state is equal to 6, acquiring a generator rotation speed reduction operation coefficient R4, and operating the generator at a rated rotation speed omega R4;
forty steps: if the state is not equal to 6, judging whether the icing state of the blade is equal to 7;
forty-first step: if the state is equal to 7, the wind generating set is stopped for protection;
forty-second step: if state is not equal to 7, then the run logic terminates;
forty three steps: in the process of judging logic, cabin acceleration judgment is always carried out;
forty-fourth step: acquiring the front-back acceleration Naccfa of the engine room, the left-right acceleration Naccss of the engine room, and calculating the engine room acceleration
Forty-fifth step: acquiring a cabin acceleration preset Threshold value threshold_Nacc;
forty-sixth step: judging whether Nacc is greater than threshold_Nacc;
forty-seventh step: if Nacc is greater than threshold_Nacc, the wind generating set is shut down for protection;
forty-eighth step: if Nacc is less than or equal to threshold_Nacc, the nacelle acceleration determination logic terminates.
Among the above parameters, threshold0, threshold1, threshold2, threshold3, threshold4, threshold5, R1, R2, R3, R4 are determined by simulation in combination with the safety distance between the person and the unit in the surrounding environment around the unit, the customization requirement of the power generation operator, and the like. The following table is a range of generally selectable values:
the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The wind generating set rotating speed control method based on self-contained blade icing monitoring is characterized by comprising the following steps of:
receiving state data transmitted by a blade icing sensor, and acquiring the icing thickness of the blade;
based on the icing thickness of the blade, acquiring the icing degree of the blade;
judging whether the icing degree of the blade is heavy icing, if so, acquiring the rotating speed of the generator based on the icing degree of the blade; if the icing is heavy, stopping the wind generating set for protection; if the severe icing range is exceeded, the operation logic is terminated;
acquiring the front and rear acceleration of the engine room and the left and right acceleration of the engine room, and acquiring the acceleration of the engine room based on the front and rear acceleration of the engine room and the left and right acceleration of the engine room;
judging whether the cabin acceleration is larger than a preset cabin acceleration threshold value, if so, stopping the wind generating set for protection; if not, the run logic terminates.
2. The method for controlling rotational speed of a wind turbine generator set based on self-contained blade icing monitoring of claim 1, further comprising, prior to said receiving the status data communicated by the blade icing sensor: and judging whether the electric quantity of the spare battery of the blade icing sensor is sufficient, and if the electric quantity is lower than 10%, carrying out illumination charging to 100%.
3. The method for controlling the rotational speed of the wind generating set based on the self-contained blade icing monitoring according to claim 1, wherein the step of receiving the status data transmitted by the blade icing sensor and obtaining the icing thickness of the blade comprises the following steps: the status data includes: wind speed information, fan normal power and icing power matched with the wind speed information; judging whether the blade icing sensor works normally or not, if so, sending a fault signal to a main control PLC, performing wind speed power matching calculation by the main control PLC, and obtaining the icing thickness of the blade surface through the wind speed power matching degree, and if so, sending the icing thickness of the blade surface to the main control PLC;
the wind speed power matching specifically comprises the following steps: and the main control PLC estimates the icing thickness based on the normal power and the icing power of the fan matched with the wind speed information.
4. The method for controlling the rotational speed of the wind generating set based on the self-contained blade icing monitoring according to claim 1, wherein the obtaining the icing degree of the blade based on the icing thickness of the blade specifically comprises: setting a plurality of icing thresholds which are sequentially arranged from small to large; judging whether the blade deicing system is started or not, if not, judging whether the blade icing thickness is larger than a set minimum icing threshold, and if not, indicating that the surface of the blade is not frozen; and if the icing threshold interval is exceeded, acquiring the icing degree of the blade according to the icing thickness of the blade.
5. The method for controlling the rotational speed of a wind generating set based on self-contained blade icing monitoring according to claim 4, wherein the plurality of icing thresholds are Threshold0, threshold1 and Threshold2; the Threshold0, the Threshold1 and the Threshold2 are sequentially arranged from small to large; if the icing thickness of the blade does not exceed Threshold0, the surface of the blade is not frozen, and the icing degree state=0 of the blade;
if the icing thickness of the blade exceeds Threshold0 but does not exceed Threshold1, icing starts to occur on the surface of the blade, and the icing degree state=1 of the blade;
if the icing thickness of the blade exceeds Threshold1 but does not exceed Threshold2, slightly icing the surface of the blade, and enabling the icing degree state of the blade to be=2;
if the blade icing thickness exceeds Threshold2, the blade surface is severely iced, and the blade icing degree state=3.
6. The method for controlling the rotational speed of a wind generating set based on self-contained blade icing monitoring according to claim 1, wherein the step of obtaining the degree of blade icing based on the blade icing thickness further comprises: setting a plurality of icing thresholds again, wherein the icing thresholds which are set again are arranged in sequence from small to large; judging whether the blade deicing system is started or not, if so, judging whether the blade icing thickness is larger than a set minimum icing threshold, and if not, indicating that the surface of the blade is not frozen; and if the icing threshold interval is exceeded, acquiring the icing degree of the blade according to the icing thickness of the blade.
7. The method for controlling the rotational speed of a wind generating set based on self-contained blade icing monitoring according to claim 6, wherein the resetting of the icing thresholds is: threshold3, threshold4, and Threshold5; the Threshold3, the Threshold4 and the Threshold5 are sequentially arranged from small to large; if the icing thickness of the blade does not exceed Threshold3, the surface of the blade is not frozen, and the icing degree state=4;
if the icing thickness of the blade exceeds Threshold3 but does not exceed Threshold4, the surface of the blade starts to be frozen, and the icing degree state=5;
if the icing thickness of the blade exceeds Threshold4 but does not exceed Threshold5, slightly icing the surface of the blade, and enabling the icing degree of the blade to be state=6;
if the blade icing thickness exceeds Threshold5, the blade surface is severely iced, and the blade icing degree state=7.
8. The method for controlling the rotational speed of the wind generating set based on the self-contained blade icing monitoring according to claim 5 or 7, wherein the determining of whether the degree of blade icing is heavy icing is performed, and if the degree of blade icing is smaller than the degree of blade icing, the rotational speed of the generator is obtained based on the degree of blade icing; if the icing is heavy, stopping the wind generating set for protection; if the severe icing range is exceeded, the operation logic is terminated; the method comprises the following steps:
if the icing degree state of the blade is 0, the rotating speed of the generator is operated at a rated rotating speed omega;
if the icing degree state of the blade is 1, the rotation speed of the generator is reduced by an operation coefficient R1, and the rotation speed of the generator is operated at a rated rotation speed omega R1;
if the icing degree state of the blade is 2, the rotation speed of the generator is reduced by an operation coefficient R2, and the rotation speed of the generator is operated at a rated rotation speed omega R2;
if the icing degree state of the blade is 3, stopping the wind generating set for protection;
if the icing degree state of the blade is 4, the rotating speed of the generator is operated at a rated rotating speed omega;
if the icing degree state of the blade is 5, acquiring a generator rotation speed reduction operation coefficient R3, and operating the generator at a rated rotation speed omega R3;
if the icing degree state of the blade is 6, acquiring a generator rotation speed reduction operation coefficient R4, and operating the generator at a rated rotation speed omega R4;
if the icing degree state of the blade is 7, stopping the wind generating set for protection;
if the blade icing level state is not 7, the operation logic is terminated.
9. The method for controlling the rotational speed of the wind generating set based on the self-contained blade icing monitoring according to claim 8, wherein the step of acquiring the cabin front-rear acceleration and the cabin left-right acceleration is performed by: the cabin front-rear acceleration Naccfa, the cabin left-right acceleration Naccss and the cabin acceleration are as follows:
10. wind generating set rotational speed control system based on self-supporting blade icing monitoring, its characterized in that includes:
the receiving module is used for receiving the state data transmitted by the blade icing sensor and acquiring the icing thickness of the blade;
the first acquisition module acquires the icing degree of the blade based on the icing thickness of the blade;
the first judging module judges whether the icing degree of the blade is heavy icing or not, and if the icing degree of the blade is smaller than the heavy icing degree, the rotating speed of the generator is obtained based on the icing degree of the blade; if the icing is heavy, stopping the wind generating set for protection; if the severe icing range is exceeded, the operation logic is terminated;
the second acquisition module acquires the cabin front-rear acceleration and the cabin left-right acceleration, and acquires the cabin acceleration based on the cabin front-rear acceleration and the cabin left-right acceleration;
the second judging module judges whether the cabin acceleration is larger than a preset cabin acceleration threshold value or not, and if yes, the wind turbine generator system stops for protection; if not, the run logic terminates.
CN202310609814.4A 2023-05-26 2023-05-26 Wind generating set rotating speed control method and system based on self-contained blade icing monitoring Pending CN116498506A (en)

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CN202310609814.4A CN116498506A (en) 2023-05-26 2023-05-26 Wind generating set rotating speed control method and system based on self-contained blade icing monitoring

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