CN110308304B - Wind generating set wind vane zero calibration method - Google Patents
Wind generating set wind vane zero calibration method Download PDFInfo
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Abstract
The invention discloses a wind generating set wind vane zero calibration method, which comprises the following steps: 1) the wind turbine generator enters a wind direction calibration zero calibration mode; 2) adjusting wind vane angle compensation, and collecting and recording fan operation data; 3) firstly constructing a fan operation efficiency model and calculating a wind vane correction angle corresponding to the optimal efficiency; 4) judging the angle compensation direction of the secondary wind vane according to the calculation result of the step 3), adjusting the angle compensation of the wind vane again, and collecting and recording the operation data of the fan; 5) reconstructing a fan operation efficiency model and calculating a wind vane correction angle corresponding to the optimal efficiency; 6) and 5) automatically correcting zero or sending out prompt information for the wind vane according to the calculation result in the step 5). The method fully considers the influence on the generating efficiency of the wind turbine generator when the zero position of the wind vane and the axis of the engine room form an included angle, can enable the fan to continuously operate in an optimal output state, reduces the working intensity and safety risk of operation and maintenance personnel, and ensures the operating efficiency and generating benefit of the wind turbine generator.
Description
Technical Field
The invention relates to the field of wind driven generators, in particular to a wind vane zero calibration method for a wind driven generator set.
Background
In recent years, with the increasing of the installed quantity of wind turbines, wind farm owners and host manufacturers pay attention to the continuous transition from installed capacity to fan operating efficiency, how to ensure optimal output of fans to a certain extent, improve the generating performance of fans, and improve the availability and full-time hours of fans have great research value and guiding significance.
After the wind turbine generator system runs for a period of time, due to the fact that the wind vane has the influences of system errors, random errors and the like, the zero position of the wind vane deviates from the axis of the engine room to a certain extent, the yaw control precision of the fan is influenced, and the power generation efficiency of the fan is reduced. Periodically calibrating the wind vane manually is an effective way to solve this problem, but this method requires a significant increase in labor costs and presents some random errors and potential risks. Therefore, the method for automatically judging and correcting the zero position of the wind vane is very important and is also an important means for improving the power generation performance of the wind turbine generator.
Disclosure of Invention
In order to solve the technical problems, the invention provides a wind generating set wind direction calibration method which can fully consider the design and operation parameters of a wind generating set, can enable a fan to continuously operate in an optimal output state, reduce the working strength and potential safety hazards of operation and maintenance personnel, and ensure the operation efficiency and the power generation income of the wind generating set.
The technical scheme adopted by the invention is as follows: a wind generating set wind vane zero calibration method comprises the following steps:
1) enabling the wind turbine generator to enter a wind direction calibration zero calibration mode, and starting to perform wind direction calibration zero calibration;
2) adjusting wind vane angle compensation, and collecting and recording fan operation data;
3) firstly constructing a fan operation efficiency model, and calculating a wind vane correction angle corresponding to the optimal efficiency;
4) judging the angle compensation direction of the secondary wind vane according to the result calculated in the step 3), and collecting and recording the running data of the fan;
5) reconstructing a fan operation efficiency model, and calculating a wind vane correction angle corresponding to the optimal efficiency;
6) and 5) automatically correcting zero or sending out prompt information for the wind vane according to the calculation result in the step 5).
The wind power generatorIn the method for zero calibration of wind vane group, in the step 1), according to the designated time period T1A wind vane zero calibration task is executed periodically or once; when the wind turbine generator executes a wind direction calibration zero calibration task, the wind turbine generator enters a wind direction calibration zero calibration mode.
In the wind vane zero calibration method for the wind generating set, the specific operation of the step 2) is as follows:
2.1) setting the wind vane compensation angle of the wind turbine generator to be 0 degree;
2.2) operating the data acquisition module according to a given data acquisition period T2Gather fan real-time operating data and record to the data storage module in, the data acquisition includes: hub rotation speed omegarotCabin wind speed VwPower amplitude limit value P of fanlimFan state KstYaw wind error angle thetaerrWind vane offset angle θosAir density ρ;
2.3) the data calculation module calculates the acquired data according to a given calculation period T3Calculating a primary average value and recording the primary average value into a data storage module;
2.4) when the running state and the running environment of the fan meet given requirements, the data calculation module records the calculation result in the step 2.3) into the data storage module, and calculates the generating efficiency of the fan according to the running state and the environmental parameters of the fan;
2.5) repeating for 2.3) -2.4) for multiple times, and recording multiple groups of fan operation data of the wind vane compensation angle.
2.6) respectively carrying out wind vane angle compensation on the wind vane of the fan along the first direction according to a specified interval, and collecting and recording multiple groups of data after single compensation according to the steps 2.3) -2.5).
In the wind vane zero calibration method for the wind generating set, in the step 2.2), the acquisition period is 1 second; in the step 2.3), the calculation period is 10 minutes.
In the wind vane zero calibration method for the wind generating set, in the step 2.4), when the generating efficiency of the fan is calculated, the requirements that the running state and the environment of the fan need to meet include: a. the running stage of the fan is a maximum wind energy tracking section; b. the fan is in a free running state; c. the fan operates under a normal power generation working condition; d. the actual wind vane compensation angle of the fan is consistent with the current given wind vane compensation angle; e. the yaw wind error angle is in a smaller range; f. the average turbulence intensity is lower than class a.
In the wind vane zero calibration method for the wind generating set, in the step 2.5), the repetition times of 2.3) -2.4) are not less than 50; in the step 2.6), the direction of the wind vane positive direction compensation is taken as the first direction, and when the wind vane angle compensation is carried out, the wind vane angle compensation interval is 0-thetafpAt an interval of thetabTheta and DEGb≤θfpThe wind vane compensation angle after the ith wind vane angle compensation is as follows: thetaos＝θbi i ═ 1,2,3, 4., where: i is the number of compensation times of the wind vane angle, thetafpThe angular maximum is compensated for a given primary wind vane.
In the wind vane zero calibration method for the wind generating set, in the step 3): extracting the fan operation data recorded in the step 2.6), constructing a wind vane compensation angle and fan operation efficiency function model according to the fan operation characteristics when the wind vane is not aligned to the axis of the cabin, and calculating a wind vane deviation angle theta corresponding to the optimal operation efficiency in the function modelopt_1。
In the wind vane zero calibration method for the wind generating set, the step 4) specifically comprises the following operations:
4.1) judging the compensation angle correction direction of the secondary wind vane when the-xi is less than or equal to thetaopt_1When the wind direction indicator is less than or equal to xi, directly carrying out zero calibration on the wind direction indicator; when theta isopt_1<ξ, the quadratic vane compensation angle is modified in a second direction; when theta isopt_1When the wind direction is larger than xi, the compensation angle of the secondary wind vane is corrected along the first direction;
4.2) when the secondary wind vane compensation angle is corrected along the second direction or the first direction, correcting the secondary wind vane compensation angle and acquiring the operation data of the secondary correction fan, wherein the data acquisition method comprises the following steps:
when the wind vane compensation angle is corrected in the second direction, according to the designated interval thetabWind vane compensation angle range thetafpWithin a range of' 0 DEG to perform wind vane angleCompensating, and acquiring and recording data according to the steps 2.3) -2.5) after single compensation; the wind vane compensation angle after the nth secondary wind vane angle compensation is as follows: thetaos′＝θb(-n) n ═ 1,2,3, 4. n is the angle compensation frequency of the secondary wind vane, thetafp' correcting the minimum value of the angle for a given secondary wind vane;
when the wind vane compensation angle is corrected in the first direction, according to the designated interval thetabTheta in the compensation angle interval of the wind vanefp°～θfpWind vane angle compensation is carried out within the range of DEG, data are collected and recorded according to the steps 2.3) -2.5) after single compensation, and the wind vane compensation angle after the nth secondary wind vane angle compensation is as follows: thetaos″＝θfp+θbn n ═ 1,2,3, 4., where: n is the angle compensation frequency of the secondary wind vane, thetafp"correction of the maximum value of the angle for a given quadratic vane and θfp″≥θfp。
In the wind vane zero calibration method for the wind generating set, in the step 5): extracting the fan operation data recorded in the step 2) and the step 4), reconstructing a wind vane compensation angle and fan operation efficiency function model, and calculating a wind vane deviation angle theta corresponding to the optimal operation efficiency in the reconstructed modelopt_2。
In the wind vane zero calibration method for the wind generating set, in the step 6), when the wind vane deviates from the angle θopt_2When the wind vane is within the given automatic adjustment range, automatically correcting zero; otherwise, sending out predicted deviation angle prompt information, and manually zeroing the wind vane with larger deviation angle;
whether the automatic zero calibration wind vane or the prompt information is sent is judged according to the following formula:
wherein, thetaoptAnd the optimal zero calibration angle of the wind vane is obtained, and xi' is the automatic zero calibration angle amplitude limit value of the given wind vane.
Compared with the prior art, the invention has the beneficial effects that:
the method and the device take real-time operation data of the wind turbine generator as a basis, fully consider the operation principle and design parameters of the wind turbine generator, and independently calculate the optimal zero calibration angle of the wind vane of the fan according to different machine type configurations and machine positions.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a schematic diagram of the method of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the present invention comprises the steps of:
1) according to a specified time period T1The wind vane zero calibration task is executed regularly or in a specified single time; when the wind turbine generator executes the wind direction calibration zero calibration task, the wind turbine generator enters a wind direction calibration zero calibration mode, and wind direction calibration zero calibration is started.
2) Adjusting wind vane angle compensation, collecting and recording fan operation data, wherein the specific operation is as follows:
2.1) setting the wind vane compensation angle of the wind turbine generator to be 0 degree;
2.2) the operation data acquisition module acquires real-time operation data of the fan according to a given data acquisition period and records the real-time operation data into the data storage module, wherein the acquisition period T2Is 1 second. The data acquisition comprises the following steps: hub rotation speed omegarotCabin wind speed VwPower amplitude limit value P of fanlimFan state KstYaw wind error angle thetaerrWind vane offset angle θosAir density ρ, etc.
2.3) the data calculation module calculates the once average value of the acquired data according to a given calculation period and records the once average value into the data storage module; calculating the period T3Was 10 minutes.
2.4) when the fan is in a free running state and the running environment meets the given requirements, the data calculation module records the calculation result in the step 2.3) into the data storage module, and calculates the generating efficiency of the fan according to the running state of the fan and the environmental parameters;
the requirements that the running state of the fan and the environment need to meet include: a. the running stage of the fan is a maximum wind energy tracking section; b. the fan is in a free running state and has no power limit behavior; c. the running state of the fan is a power generation state; d. the wind vane compensation angle of the fan is consistent with the current given wind vane compensation angle; e. the yaw wind error angle is in a smaller range; f. the average turbulence intensity is lower than class a.
2.5) repeating the steps 2.3) -2.4) for multiple times, and recording multiple groups of fan operation data of the wind vane compensation angle. Repeating the steps 2.3) -2.4) for not less than 50 times.
2.6) respectively carrying out wind vane angle compensation on the wind vane of the fan along a first direction at specified intervals, and acquiring and recording multiple groups of data after single compensation according to the steps 2.3) -2.5); the first direction is the direction of wind vane positive direction compensation, and when wind vane angle compensation is carried out, the wind vane angle compensation interval is 0-thetafpAt an interval of thetab°，θb≤θfpThe wind vane compensation angle after the ith wind vane angle compensation is as follows: thetaos＝θbi i ═ 1,2,3, 4., where: i is the number of compensation times of the wind vane angle, thetafpCompensating the maximum value of the angle, theta, for a given primary wind vanefp≥20。
3) Extracting the fan operation data recorded in the step 2.6), constructing a wind vane compensation angle and fan operation efficiency function model according to the fan operation characteristics when the wind vane is not aligned to the axis of the cabin, and calculating a wind vane deviation angle theta corresponding to the optimal operation efficiency in the function modelopt_1。
4) Judging the angle compensation direction of the secondary wind vane according to the result calculated in the step 3), and collecting and recording the running data of the fan; the specific operation is as follows:
4.1) judging the compensation angle correction direction of the secondary wind vane when the-xi is less than or equal to thetaopt_1When the wind direction indicator is less than or equal to xi, directly carrying out zero calibration on the wind direction indicator; when theta isopt_1<ξ, the quadratic vane compensation angle is modified in a second direction; when theta isopt_1When the wind direction is larger than xi, the compensation angle of the secondary wind vane is corrected along the first direction;
4.2) when the secondary wind vane compensation angle is corrected along the second direction or the first direction, correcting the secondary wind vane compensation angle and acquiring the operation data of the secondary correction fan, wherein the data acquisition method comprises the following steps:
when the wind vane compensation angle is corrected in the second direction, according to the designated interval thetabWind vane compensation angle range thetafpWind vane angle compensation is carried out within a range of' DEG to 0 DEG, and data are collected and recorded according to the steps 2.3) -2.5) after single compensation; the wind vane compensation angle after the nth secondary wind vane angle compensation is as follows: thetaos′＝θb(-n) n ═ 1,2,3, 4. n is the angle compensation frequency of the secondary wind vane, thetafp' correcting the minimum value of the angle for a given secondary wind vane;
when the wind vane compensation angle is corrected in the first direction, according to the designated interval thetabTheta in the compensation angle interval of the wind vanefp°～θfpWind vane angle compensation is carried out within the range of DEG, data are collected and recorded according to the steps 2.3) -2.5) after single compensation, and the wind vane compensation angle after the nth secondary wind vane angle compensation is as follows: thetaos″＝θfp+θbn n ═ 1,2,3, 4., where: n is the angle compensation frequency of the secondary wind vane, thetafp"correction of the maximum value of the angle for a given quadratic vane and θfp″≥θfp。
5) Extracting the fan operation data recorded in the step 2) and the step 4), reconstructing a wind vane compensation angle and fan operation efficiency function model, and calculating a wind vane deviation angle theta corresponding to the optimal operation efficiency in the reconstructed modelopt_2。
6) In the step 6), when the wind vane deviates from the angle thetaopt_2When the wind vane is within the given automatic adjustment range, automatically correcting zero; otherwise, sending a predicted deviation angle prompt message, and manually zeroing the wind vane with a larger deviation angle;
whether the automatic zero calibration wind vane or the prompt information is sent is judged according to the following formula:
wherein, thetaoptAnd the optimal zero calibration angle of the wind vane is obtained, and xi' is the automatic zero calibration angle amplitude limit value of the given wind vane.
Claims (8)
1. A wind generating set wind vane zero calibration method comprises the following steps:
1) enabling the wind turbine generator to enter a wind direction calibration zero calibration mode, and starting to perform wind direction calibration zero calibration;
2) adjusting wind vane angle compensation, and collecting and recording fan operation data;
2.1) setting the wind vane compensation angle of the wind turbine generator to be 0 degree;
2.2) operating the data acquisition module according to a given data acquisition period T2Gather fan real-time operating data and record to the data storage module in, the data acquisition includes: hub rotation speed omegarotCabin wind speed VwPower amplitude limit value P of fanlimFan state KstYaw wind error angle thetaerrWind vane offset angle θosAir density ρ;
2.3) the data calculation module calculates the acquired data according to a given calculation period T3Calculating a primary average value and recording the primary average value into a data storage module;
2.4) when the running state and the running environment of the fan meet given requirements, the data calculation module records the calculation result in the step 2.3) into the data storage module, and calculates the generating efficiency of the fan according to the running state and the environmental parameters of the fan;
2.5) repeating for 2.3) -2.4) for multiple times, and recording multiple groups of fan operation data of the wind vane compensation angle;
2.6) respectively carrying out wind vane angle compensation on the wind vane of the fan along a first direction at specified intervals, and acquiring and recording multiple groups of data after single compensation according to the steps 2.3) -2.5);
3) firstly constructing a fan operation efficiency model, and calculating a wind vane correction angle corresponding to the optimal efficiency;
4) judging the angle compensation direction of the secondary wind vane according to the result calculated in the step 3), adjusting the angle compensation of the wind vane again, and collecting and recording the running data of the fan;
4.1) judging the compensation angle correction direction of the secondary wind vane when the-xi is less than or equal to thetaopt_1When the wind direction indicator is less than or equal to xi, directly carrying out zero calibration on the wind direction indicator; when theta isopt_1<ξ, the quadratic vane compensation angle is modified in a second direction; when theta isopt_1When the wind direction is larger than xi, the compensation angle of the secondary wind vane is corrected along the first direction;
4.2) when the secondary wind vane compensation angle is corrected along the second direction or the first direction, correcting the secondary wind vane compensation angle and acquiring the operation data of the secondary correction fan, wherein the data acquisition method comprises the following steps:
when the wind vane compensation angle is corrected in the second direction, according to the designated interval thetabWind vane compensation angle range thetafpWind vane angle compensation is carried out within a range of' DEG to 0 DEG, and data are collected and recorded according to the steps 2.3) -2.5) after single compensation; the wind vane compensation angle after the nth secondary wind vane angle compensation is as follows: thetaos′＝θb(-n) n ═ 1,2,3, 4. n is the angle compensation frequency of the secondary wind vane, thetafp' correcting the minimum value of the angle for a given secondary wind vane;
when the wind vane compensation angle is corrected in the first direction, according to the designated interval thetabTheta in the compensation angle interval of the wind vanefp°～θfpWind vane angle compensation is carried out within the range of DEG, data are collected and recorded according to the steps 2.3) -2.5) after single compensation, and the wind vane compensation angle after the nth secondary wind vane angle compensation is as follows: thetaos″＝θfp+θbn n ═ 1,2,3, 4., where: n is the angle compensation frequency of the secondary wind vane, thetafp"correction of the maximum value of the angle for a given quadratic vane and θfp″≥θfp；
5) Reconstructing a fan operation efficiency model, and calculating a wind vane correction angle corresponding to the optimal efficiency;
6) and 5) automatically correcting zero or sending out prompt information for the wind vane according to the calculation result in the step 5).
2. The wind generating set wind vane zero calibration method according to claim 1, wherein in the step 1), the wind generating set wind vane zero calibration method is carried out according to a specified time period T1A wind vane zero calibration task is executed periodically or once; and when the wind turbine generator executes the wind direction calibration zero calibration task, the wind turbine generator enters a wind direction calibration zero calibration mode.
3. The wind generating set wind vane zero calibration method according to claim 1, wherein in the step 2.2), the collection period is 1 second; in the step 2.3), the calculation period is 10 minutes.
4. The wind generating set wind vane zero calibration method according to claim 1, wherein in step 2.4), when calculating the generating efficiency of the fan, the requirements that the running state and the environment of the fan need to meet include: a. the running stage of the fan is a maximum wind energy tracking section; b. the fan is in a free running state; c. the fan operates under a normal power generation working condition; d. the actual wind vane compensation angle of the fan is consistent with the current given wind vane compensation angle; e. the yaw wind error angle is in a smaller range; f. the average turbulence intensity is lower than class a.
5. The wind vane zero calibration method of the wind generating set of claim 1, wherein in the step 2.6), the compensation direction of the positive direction of the wind vane is taken as the first direction, and when the wind vane angle compensation is performed, the wind vane angle compensation interval is 0-thetafpAt an interval of thetabAnd the wind vane compensation angle after the ith wind vane angle compensation is as follows: thetaos＝θb1,2,3,4, wherein: i is the number of compensation times of the wind vane angle, thetafpThe angular maximum is compensated for a given primary wind vane.
6. The wind generating set wind vane zero calibration method according to claim 1, wherein in the step 3): extracting the fan operation data recorded in the step 2.6), constructing a wind vane compensation angle and fan operation efficiency function model according to the fan operation characteristics when the wind vane is not aligned to the axis of the cabin, and calculating a functionWind vane slip angle theta corresponding to optimal operating efficiency in numerical modelopt_1。
7. The wind generating set wind vane zero calibration method according to claim 1, wherein in the step 5): extracting the fan operation data recorded in the step 2) and the step 4), reconstructing a wind vane compensation angle and fan operation efficiency function model, and calculating a wind vane deviation angle theta corresponding to the optimal operation efficiency in the reconstructed modelopt_2。
8. The wind generating set wind vane zero calibration method according to claim 7, wherein in the step 6), when the wind vane deviates from the angle θopt_2When the wind vane is within the given automatic adjustment range, automatically correcting zero; otherwise, sending out predicted deviation angle prompt information, and manually zeroing the wind vane with larger deviation angle;
whether the automatic zero calibration wind vane or the prompt information is sent is judged according to the following formula:
wherein, thetaoptAnd the optimal zero calibration angle of the wind vane is obtained, and xi' is the automatic zero calibration angle amplitude limit value of the given wind vane.
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