CN111878312B - System and method for solving leeward power generation faults of wind turbine generator - Google Patents
System and method for solving leeward power generation faults of wind turbine generator Download PDFInfo
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- CN111878312B CN111878312B CN202010896165.7A CN202010896165A CN111878312B CN 111878312 B CN111878312 B CN 111878312B CN 202010896165 A CN202010896165 A CN 202010896165A CN 111878312 B CN111878312 B CN 111878312B
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- 238000010248 power generation Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000523 sample Substances 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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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
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
- F03D7/047—Automatic control; Regulation by means of an electrical or electronic controller characterised by the controller architecture, e.g. multiple processors or data communications
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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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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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
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/321—Wind directions
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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)
- Wind Motors (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
The invention provides a system and a method for solving the leeward power generation fault of a wind turbine generator. The system comprises: the ultrasonic anemometer is arranged at the top of the fan cabin and is used for measuring real-time wind speed and wind direction signals at the top of the cabin; the special PLC is connected to the ultrasonic anemometer, acquires wind speed and wind direction signals measured by the ultrasonic anemometer, and blade angle and impeller rotating speed values of the wind turbine, judges whether the unit is in a leeward power generation state or not through an internal fault logic recognition algorithm, and whether the reason for the leeward power generation fault of the unit is that the ultrasonic anemometer breaks down or is turbulent, and executes corresponding unit shutdown and reset instructions. The system and the method for solving the leeward power generation faults of the wind turbine generator can identify the leeward power generation state and reason of the wind turbine generator, perform early warning on the wind turbine generator, and simultaneously reduce the condition of higher failure rate of the wind turbine generator caused by unreliable performance of a mechanical wind meter.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a system and a method for solving the lee power generation fault of a wind turbine generator.
Background
Early Gemei bran G5X series units have the defect of wind logic design, and are mainly expressed as follows:
1) The 2-bit Gray code signal composed of high and low levels output by the mechanical wind vane 0-degree position sensor and the 90-degree position sensor is adopted, and whether the unit accurately faces wind is judged by judging the state of the signal and calculating the duty ratio of the signal. However, when one of the signals is wrong or continuously unchanged, the unit considers that the wind direction is changed, and yaw is started to perform wind facing. When the yaw time exceeds 1000s (the yaw speed of the yaw system is 0.4 DEG/s, and the yaw time is about 400 DEG when the yaw system can yaw for 1000 s), the signal is still abnormal, and the yaw time-out fault is reported by the machine set. Therefore, the unit has no code for judging the failure of the wind vane.
In addition, as the mechanical wind vane is used in a severe natural environment after being exposed for a long time, the mechanical components are extremely easy to be blocked and damaged, so that the power generation performance of the unit is reduced.
2) The existing PLC controller only has the judging condition that the wind speed is low in power and high in power aiming at the wind speed power mismatch fault, when the wind speed is low in power and the wind speed is high in the yaw process of the unit during the strong wind, the unit cannot report the fault, and therefore the unit is very easy to enter a leeward power generation state. In addition, the unit cannot accurately calculate the deviation angle and direction with the wind direction, so that the directional yaw control cannot be realized, and the alarm function of overlarge wind deviation angle cannot be realized.
The wind turbine generator system has the advantages that when the wind vane of the wind turbine generator system fails or is influenced by turbulence, the wind turbine generator system is easy to yaw for a long time to find wind, namely, the wind turbine generator system operates in a leeward power generation state, so that the wind turbine generator system is subjected to uneven load and is subjected to tower falling accidents.
Disclosure of Invention
The invention aims to solve the technical problem of providing a system and a method for solving the leeward power generation fault of a wind turbine generator, which can identify the leeward power generation state and reason of the wind turbine generator, perform early warning on the wind turbine generator and simultaneously reduce the condition of higher failure rate of the wind turbine generator caused by unreliable performance of a mechanical wind meter.
In order to solve the technical problems, the invention provides a system for solving the leeward power generation fault of a wind turbine generator, which comprises: the ultrasonic anemometer is arranged at the top of the fan cabin and is used for measuring real-time wind speed and wind direction signals at the top of the cabin; the special PLC is connected to the ultrasonic anemometer, acquires wind speed and wind direction signals measured by the ultrasonic anemometer, and blade angle and impeller rotating speed values of the wind turbine, judges whether the unit is in a leeward power generation state or not through an internal fault logic recognition algorithm, and whether the reason for the leeward power generation fault of the unit is that the ultrasonic anemometer breaks down or is turbulent, and executes corresponding unit shutdown and reset instructions.
In some embodiments, the ultrasonic anemometry converts the collected wind speed and direction signals into analog wind speed frequency signals, analog 0-degree position sensor signals and analog 90-degree position sensor signals recognizable by the master control PLC through the expansion function circuit, and outputs the analog wind speed frequency signals, the analog 0-degree position sensor signals and the analog 90-degree position sensor signals to the master control PLC.
In some embodiments, the master control PLC is used for judging whether the unit accurately faces wind and determining whether the unit needs yaw for wind finding.
In some embodiments, an ultrasonic anemometer includes: four ultrasonic anemometer probes.
In some embodiments, four ultrasonic anemometer probes are positioned in pairs, with two ultrasonic anemometer probes positioned in pairs, one generating an ultrasonic signal and the other receiving a signal at the same time of operation.
In some implementations, the fault logic identification rules in the fault logic identification algorithm include: the ultrasonic anemometer has a fault current value under the condition of a wind speed and wind direction output signal mode 1, and the duration exceeds 30s; or the handshake signal of the RS485 communication line is lost under the condition of the wind speed and wind direction output signal mode 2 of the ultrasonic anemometer, and the duration exceeds 30s.
In some embodiments, the leeward power generation state identification logic in the fault logic identification algorithm comprises: after the unit enters a power generation state for two minutes, the wind deviation angle of 10s is larger than a time duty ratio threshold A corresponding to the average wind speed in the time period, and the time lasts for 30s; or after the unit enters a power generation state for two minutes, the wind deviation angle of 3s is larger than a time duty ratio threshold value B corresponding to the average wind speed in the time period, and the time lasts for 30s; or after the unit enters a power generation state for two minutes, the wind speed-rotating speed curve is checked by the 3s average wind speed to obtain a theoretical rotating speed corresponding to the wind speed, the current actual rotating speed is less than 50% of the theoretical rotating speed, and the duration is 30s; or after the unit enters a power generation state for two minutes, the 3s average wind speed looks up a wind speed-pitch angle curve to obtain a theoretical blade angle corresponding to the wind speed, wherein the current actual blade angle is less than 50% of the theoretical blade angle, and the duration is 30s.
In addition, the invention also provides a method for solving the leeward power generation fault of the wind turbine generator, which comprises the following steps: measuring a real-time wind speed and direction signal by an ultrasonic anemometer; and acquiring wind speed and wind direction signals measured by the ultrasonic anemometer, and blade angle and impeller rotating speed values of the wind turbine, judging whether the unit is in a leeward power generation state or not through a fault logic recognition algorithm, judging whether the reason for the leeward power generation failure of the unit is that the ultrasonic anemometer fails or is turbulent, and executing corresponding unit shutdown and reset instructions.
In some implementations, the fault logic identification rules in the fault logic identification algorithm include: the ultrasonic anemometer has a fault current value under the condition of a wind speed and wind direction output signal mode 1, and the duration exceeds 30s; or the handshake signal of the RS485 communication line is lost under the condition of the wind speed and wind direction output signal mode 2 of the ultrasonic anemometer, and the duration exceeds 30s.
In some embodiments, the leeward power generation state identification logic in the fault logic identification algorithm comprises: after the unit enters a power generation state for two minutes, the wind deviation angle of 10s is larger than a time duty ratio threshold A corresponding to the average wind speed in the time period, and the time lasts for 30s; or after the unit enters a power generation state for two minutes, the wind deviation angle of 3s is larger than a time duty ratio threshold value B corresponding to the average wind speed in the time period, and the time lasts for 30s; or after the unit enters a power generation state for two minutes, the wind speed-rotating speed curve is checked by the 3s average wind speed to obtain a theoretical rotating speed corresponding to the wind speed, the current actual rotating speed is less than 50% of the theoretical rotating speed, and the duration is 30s; or after the unit enters a power generation state for two minutes, the 3s average wind speed looks up a wind speed-pitch angle curve to obtain a theoretical blade angle corresponding to the wind speed, wherein the current actual blade angle is less than 50% of the theoretical blade angle, and the duration is 30s.
With such a design, the invention has at least the following advantages:
the ultrasonic anemometer with more stable performance is adopted, and the failure rate of the mechanical anemometer is reduced. On the basis that the control and protection functions of the unit are not affected by the existing main control PLC controller, the state of the unit leeward power generation caused by the failure or turbulence of the ultrasonic anemometer is effectively identified by adding an external PLC controller, early warning is carried out in advance, and the safe and stable operation of the unit is greatly ensured.
Drawings
The foregoing is merely an overview of the present invention, and the present invention is further described in detail below with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic diagram of a functional protection body circuit for a PLC controller suitable for use in the present invention;
FIG. 2 is a schematic diagram of a functional protection main body circuit of a PLC controller of a G5X series unit provided with a mechanical wind meter;
FIG. 3 is a view of an ultrasonic anemometer mounting location suitable for use with the present invention;
FIG. 4 is an ultrasonic anemometer vs. wind deflection angle;
FIG. 5 is a reference threshold A for identifying that the unit is in a leeward power generation state, suitable for use in the present invention;
fig. 6 is a reference threshold B for identifying that the unit according to the invention is in a leeward power generating state.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
In view of the above shortcomings, how to effectively identify the state of the unit in the leeward power generation and judge the leeward power generation of the unit has great significance in realizing the fault early warning of the unit and preventing the unit from serious safety accidents.
The invention provides a system and a method for solving a leeward power generation fault of a wind turbine generator, and the system and the method are shown in figures 1, 2, 3, 4, 5 and 6.
A system and method for solving the lee power generation fault of a wind turbine generator set comprises the following steps: the wind speed and direction signal output by the ultrasonic wind meter, the blade angle and the impeller rotating speed value of the wind turbine are led into a newly-added external PLC controller, whether the unit is in a leeward power generation state or not is judged through a fault logic identification algorithm in the PLC controller, whether the reason for the leeward power generation fault of the unit is that the ultrasonic wind meter breaks down or is turbulent, and corresponding unit shutdown and reset instructions are executed. The main circuit structure is shown in figure 1, and the main control PLC controller normally executes the control and protection functions of the unit. The newly added external PLC controller is also referred to as a dedicated PLC.
Further, the G5X series unit replaces a mechanical wind vane and a cup type anemometer which are fixedly arranged at the top of the engine room with an ultrasonic tester. The wind speed and direction information output by the ultrasonic anemometer is input into a newly-added PLC controller and is converted into a simulated wind speed frequency signal, a simulated 0-degree position sensor signal and a simulated 90-degree position sensor signal which can be identified by the master control PLC controller, and the simulated wind speed and direction information is used for judging whether the unit accurately faces wind or not by the master control PLC controller and determining whether the unit needs yaw wind finding or not. Meanwhile, other signals are introduced for the unit to execute other control and protection actions. The main circuit structure is shown in fig. 2.
Further, the ultrasonic anemometer is installed at the top of the cabin, and is provided with 4 ultrasonic anemometer probes, as shown in fig. 3, two corresponding ultrasonic probes generate ultrasonic signals at the same working time, the other ultrasonic probe receives the signals, and the wind speed and the wind direction angle are calculated by the time that the corresponding ultrasonic probes transmit and receive signals under the disturbance of wind.
Further, the fault logic condition is judged as follows:
(1) The fault current value (less than 2mA and different brands of ultrasonic anemometers) occurs under the condition of the wind speed and wind direction output signal mode 1 of the ultrasonic anemometer, and the duration exceeds 30s.
(2) And the handshake signal of the RS485 communication line is lost under the condition of the wind speed and wind direction output signal mode 2 of the ultrasonic anemometer, and the duration exceeds 30s.
Further, for the mechanical wind vane, any one of the conditions (1) and (2) is satisfied, so that the ultrasonic wind meter can be judged to be faulty.
Further, according to the method for identifying the leeward power generation state of the unit caused by turbulence, the logic for identifying the leeward power generation state is as follows:
(1) After the unit enters a power generation state for two minutes, the wind deviation angle of 10s is larger than the time duty ratio threshold A corresponding to the average wind speed in the time period, and the time lasts for 30s.
(2) After the unit enters a power generation state for two minutes, the wind deviation angle of 3s is larger than a time duty ratio threshold value B corresponding to the average wind speed in the time period, and the time lasts for 30s.
(3) After the unit enters a power generation state for two minutes, the wind speed-rotating speed curve is checked by the 3s average wind speed, the theoretical rotating speed corresponding to the wind speed is obtained, the current actual rotating speed is less than 50% of the theoretical rotating speed, and the duration time is 30s.
(4) After the unit enters a power generation state for two minutes, the wind speed-pitch angle curve is checked by the 3s average wind speed to obtain a theoretical blade angle corresponding to the wind speed, wherein the current actual blade angle is smaller than 50% of the theoretical blade angle, and the duration is 30s.
Further, the ultrasonic anemometer has a wind deflection angle, the ultrasonic anemometer installed at the top of the cabin has a wind deflection laser probe, a 180-degree wind deflection mode is adopted, when the unit is opposite to the wind direction, the wind deflection angle is 180 degrees, and when the unit generates power in the lee direction, the wind deflection angle is 0 degree, as shown in fig. 4.
Further, the threshold A, B is shown in fig. 5 and 6. Under the influence of turbulence, the deviation of the wind deviation angle output by the ultrasonic anemometer can be within a certain range, the larger the wind speed is, the smaller the turbulence is, the smaller the wind deviation angle is in a certain time period, and the calculated wind deviation angle is slightly smaller in a long time period compared with a short time period.
Further, the leeward power generation recognition logic can judge that the unit is in the leeward power generation state when any one of the conditions (1) to (4) is met.
Further, the unit leeward power generation state caused by the fault of the ultrasonic wind meter is judged, and after the fault is eliminated, the machine is started by manually resetting at the bottom of the tower or in the cabin, and automatic resetting is forbidden.
Further, the wind speed turbulence-caused unit leeward power generation state is judged, and after the wind speed tends to be stable, the machine can be started in an automatic reset mode. The reset conditions are as follows: the time for the blade angle of the unit to receive the safe angle position exceeds 5 minutes, the duration of the rotation speed of the unit to be reduced to 0.3 r/min is 5 minutes, and the automatic reset failure times of the unit are not more than 3 times.
Further, the ultrasonic anemometer has 2 modes in the output of wind speed and wind direction signals. For the mode 1 state, the wind speed signal outputs 4-20 mA of current corresponding to the wind speed of 3-20 m/s, and the wind direction signal outputs 4-20 mA of current corresponding to the wind direction angle of 0-360 degrees. For the mode 2 state, the character string output by the RS485 communication signal comprises the wind speed and the wind direction angle value.
Further, under the condition of the newly-added external PLC controller and the wind speed and wind direction output signal mode 1 of the ultrasonic anemometer, judging whether the current value is smaller than a certain limiting value by utilizing the collected wind speed and the current value correspondingly output by the wind direction angle so as to judge whether the ultrasonic anemometer has faults; and under the condition of the wind speed and wind direction output signal mode 2 of the ultrasonic anemometer, judging whether the ultrasonic anemometer has faults or not according to whether handshake signals of the RS485 communication line are lost within a certain time range.
Further, the wind speed-pitch angle and wind speed-rotating speed curves of the unit can be referred to through factory specifications of the unit.
Further, the conditions for identifying the lee power generation state of the unit are not met, the unit is in a normal running state, the original master control PLC controller normally executes unit control and protection commands, and the newly added PLC controller does not execute any commands.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, and some simple modifications, equivalent variations or modifications can be made by those skilled in the art using the teachings disclosed herein, which fall within the scope of the present invention.
Claims (5)
1. The utility model provides a solve system of wind turbine generator system leeward electricity generation trouble which characterized in that is used for G5X series unit, includes:
the ultrasonic anemometer is arranged at the top of the fan cabin and is used for measuring real-time wind speed and wind direction signals at the top of the cabin;
the special PLC is connected to the ultrasonic anemometer, acquires wind speed and wind direction signals measured by the ultrasonic anemometer, and blade angle and impeller rotating speed values of the wind turbine, judges whether the unit is in a leeward power generation state or not through an internal fault logic recognition algorithm, and whether the reason for the leeward power generation fault of the unit is that the ultrasonic anemometer breaks down or is turbulent, and executes corresponding unit shutdown and reset instructions;
the main control PLC is used for judging whether the unit accurately faces wind and determining whether the unit needs yaw wind finding;
the fault logic recognition rule in the fault logic recognition algorithm comprises:
the ultrasonic anemometer has a fault current value under the condition of a wind speed and wind direction output signal mode 1, and the duration exceeds 30s; or alternatively
The handshake signal of the RS485 communication line is lost under the condition of the wind speed and wind direction output signal mode 2 of the ultrasonic anemometer, and the duration exceeds 30s;
the leeward power generation state identification logic in the fault logic identification algorithm comprises:
after the unit enters a power generation state for two minutes, the wind deviation angle of 10s is larger than a time duty ratio threshold A corresponding to the average wind speed in the time period, and the time lasts for 30s; or alternatively
After the unit enters a power generation state for two minutes, the wind deviation angle of 3s is larger than a time duty ratio threshold value B corresponding to the average wind speed in the time period, and the time lasts for 30s; or alternatively
After the unit enters a power generation state for two minutes, the wind speed-rotating speed curve is checked by the 3s average wind speed to obtain a theoretical rotating speed corresponding to the wind speed, the current actual rotating speed is less than 50% of the theoretical rotating speed, and the duration is 30s; or alternatively
After the unit enters a power generation state for two minutes, the wind speed-pitch angle curve is checked by the 3s average wind speed to obtain a theoretical blade angle corresponding to the wind speed, wherein the current actual blade angle is smaller than 50% of the theoretical blade angle, and the duration is 30s.
2. The system for solving the leeward power generation failure of the wind turbine generator according to claim 1, wherein the ultrasonic anemometer converts the collected wind speed and direction signals into analog wind speed frequency signals, analog 0-degree position sensor signals and analog 90-degree position sensor signals which can be identified by the master control PLC through the expansion function circuit, and outputs the analog wind speed frequency signals, the analog 0-degree position sensor signals and the analog 90-degree position sensor signals to the master control PLC.
3. The system for solving a leeward power generation failure of a wind turbine of claim 1, wherein the ultrasonic anemometer comprises: four ultrasonic anemometer probes.
4. A system for solving a leeward power generation failure of a wind turbine according to claim 3, wherein four ultrasonic anemometer probes are arranged in pairs, two ultrasonic anemometer probes arranged in pairs are arranged in pairs, one ultrasonic signal is generated at the same working time, and the other ultrasonic anemometer probe receives the signal.
5. The method for solving the lee power generation fault of the wind turbine generator is characterized by being used for G5X series units and comprising the following steps:
measuring a real-time wind speed and direction signal by an ultrasonic anemometer;
acquiring wind speed and direction signals measured by an ultrasonic anemometer, blade angles and impeller rotating speed values of a wind machine through a special PLC, judging whether the machine set is in a leeward power generation state or not through a fault logic recognition algorithm, judging whether the reason of the leeward power generation fault of the machine set is that the ultrasonic anemometer breaks down or is turbulent, and executing corresponding machine set shutdown and reset instructions;
the main control PLC is used for judging whether the unit accurately faces wind and determining whether the unit needs yaw wind finding;
the fault logic recognition rule in the fault logic recognition algorithm comprises:
the ultrasonic anemometer has a fault current value under the condition of a wind speed and wind direction output signal mode 1, and the duration exceeds 30s; or alternatively
The handshake signal of the RS485 communication line is lost under the condition of the wind speed and wind direction output signal mode 2 of the ultrasonic anemometer, the duration exceeds 30s,
the leeward power generation state identification logic in the fault logic identification algorithm comprises:
after the unit enters a power generation state for two minutes, the wind deviation angle of 10s is larger than a time duty ratio threshold A corresponding to the average wind speed in the time period, and the time lasts for 30s; or alternatively
After the unit enters a power generation state for two minutes, the wind deviation angle of 3s is larger than a time duty ratio threshold value B corresponding to the average wind speed in the time period, and the time lasts for 30s; or alternatively
After the unit enters a power generation state for two minutes, the wind speed-rotating speed curve is checked by the 3s average wind speed to obtain a theoretical rotating speed corresponding to the wind speed, the current actual rotating speed is less than 50% of the theoretical rotating speed, and the duration is 30s; or alternatively
After the unit enters a power generation state for two minutes, the wind speed-pitch angle curve is checked by the 3s average wind speed to obtain a theoretical blade angle corresponding to the wind speed, wherein the current actual blade angle is smaller than 50% of the theoretical blade angle, and the duration is 30s.
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| CN202010896165.7A CN111878312B (en) | 2020-08-31 | 2020-08-31 | System and method for solving leeward power generation faults of wind turbine generator |
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| 风力发电系统中随风速变化桨距角的值研究;--;《华强电子网》;全文 * |
| 风机故障处理手册;东方汽轮机有限公司;《豆丁网》;全文 * |
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