CN113217299B - Control method and system for identifying blade clamping faults and eliminating blade clamping faults of wind turbine generator - Google Patents
Control method and system for identifying blade clamping faults and eliminating blade clamping faults of wind turbine generator Download PDFInfo
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- CN113217299B CN113217299B CN202110578697.0A CN202110578697A CN113217299B CN 113217299 B CN113217299 B CN 113217299B CN 202110578697 A CN202110578697 A CN 202110578697A CN 113217299 B CN113217299 B CN 113217299B
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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
Abstract
The invention belongs to the technical field of wind power generation, and particularly relates to a control method and a control system for identifying and eliminating blade clamping faults of a wind turbine generator. The method introduces a blade-jamming fault factor, and determines whether a blade of the wind turbine generator is jammed according to the obtained variable-pitch operation parameters, wherein the blade-jamming fault factor comprises a current-time feathering angle value of the jamming, a current-time feathering speed of the jamming, a current-time feathering acceleration of the jamming, an average speed of a feathering period and an average acceleration of the feathering period. And determining whether the wind turbine generator has a blade clamping fault or not and determining whether the master control system needs to be restarted or not by judging whether the blade clamping fault factor falls into a corresponding preset value interval or not and/or based on the time-lapse blade clamping state information. Compared with the problems of single evaluation method, low accuracy of paddle clamping identification and low wind energy utilization rate in the prior art, the method provided by the invention has the advantages that the accuracy of paddle clamping identification is improved, unnecessary shutdown maintenance is reduced, and finally the power output is increased.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a control method and a control system for identifying and eliminating blade clamping faults of a wind turbine generator, and a method and a device for identifying and increasing power output of the blade clamping faults of the wind turbine generator.
Background
The variable pitch system of the wind turbine generator is an important component of the wind turbine generator, and has the main functions of: when the wind turbine generator normally operates, the pitch angle of the blades is adjusted according to the change of the wind speed, power adjustment is achieved, and when the wind turbine generator breaks down, the blades are quickly feathered to a stop position, so that the safety of the wind turbine generator is guaranteed.
In the pitch control system, a pitch control command or a feathering command is usually sent to a pitch control driving device by the pitch control system so that the pitch angle of the blades can be automatically adjusted, but in the operation process, the blades can have an unexpected blade clamping fault, which can directly cause that feathering or pitch control is not in place, the power output of the wind turbine generator is influenced, and even when the wind turbine generator is in emergency shutdown, great potential safety hazards are brought to the wind turbine generator because feathering cannot be completed.
The existing method for judging blade blocking usually directly judges whether the variable pitch angle reaches a preset feathering angle value, but the evaluation method is single, and the blocking signals cannot be accurately identified and the blocking faults cannot be determined, so that the problems of low blocking identification accuracy, low wind energy utilization rate and low power output are caused.
The invention designs a control method and a control system for identifying and eliminating blade clamping faults of a wind turbine generator blade to solve the problems.
Disclosure of Invention
In order to solve the above-mentioned defects in the prior art, the present invention is implemented by the following technical solutions.
A control method for identifying and eliminating blade clamping faults of a wind turbine generator blade is based on blade clamping identification of faults of a variable pitch driver, the wind turbine generator comprises a blade and a variable pitch system, the variable pitch system comprises a variable pitch driving system and a variable pitch control system, and the control method comprises the following steps:
if the feathering angle value at the current moment of blade clamping does not fall into a first preset instantaneous feathering angle value interval, determining that the blade clamping fault occurs on the current blade;
if the feathering angle value of the current time of the card paddle falls into a first preset instant feathering angle value interval but does not fall into a second preset instant feathering angle value interval, judging whether the feathering speed value of the current time of the card paddle falls into the first preset instant feathering speed interval or not; if the feathering speed value of the current blade at the moment of blade clamping does not fall into a first preset instantaneous feathering speed value interval, determining that the blade clamping fault occurs on the current blade;
if the feathering speed value at the current moment of the paddle clamping falls into a first preset instantaneous feathering speed value interval but does not fall into a second preset instantaneous feathering speed value interval, judging whether the feathering acceleration value at the current moment falls into a preset instantaneous feathering acceleration interval or not; if the feathering acceleration value at the current moment does not fall into the interval of the preset instantaneous feathering acceleration value, determining that the blade is blocked at the current moment; otherwise, judging that the blade is not blocked at present;
wherein the second preset instantaneous feathering angle value interval is included in the first preset instantaneous feathering angle value interval, and the second preset instantaneous feathering speed value interval is included in the first preset instantaneous feathering speed value interval; the feathering angle value at the current moment of the oar clamping is the pitch angle when the oar changing/feathering action is finished or the oar changing/feathering action is stopped because of the oar clamping, and the feathering speed value at the current moment and the feathering acceleration value at the current moment are the feathering speed and the feathering acceleration at the moment when the oar changing/feathering action is finished or the oar clamping is stopped because of the oar clamping respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; otherwise, the wind turbine generator and the variable pitch system thereof operate normally.
As a further improvement of the technology, the feathering angle value of the current time of the paddle clamping falls into a first preset instantaneous feathering angle value interval, including the end point position falling into the interval; and the second preset instant feathering speed value interval is smaller than the first preset instant feathering speed value interval.
In order to realize the control method, the invention also comprises a control system for identifying and eliminating the blade clamping failure of the wind turbine generator, the system is based on the blade clamping identification of the failure of the variable pitch driver, the wind turbine generator comprises blades and a variable pitch system, and the variable pitch system comprises a variable pitch driving system and a variable pitch control system; further comprising:
the feathering angle judging device judges that the current blade has a blade jamming fault if the feathering angle value at the current moment of blade jamming does not fall into a first preset instantaneous feathering angle value interval;
the feathering speed judging device judges whether the feathering speed value at the current moment of the paddle card falls into a first preset instantaneous feathering speed interval or not if the feathering angle value at the current moment of the paddle card falls into a first preset instantaneous feathering angle value interval but does not fall into a second preset instantaneous feathering angle value interval; if the feathering speed value of the current blade at the current moment of blade clamping does not fall into a first preset instantaneous feathering speed value interval, the feathering speed judgment device judges that the blade clamping fault occurs on the current blade;
the feathering acceleration judging device judges whether the feathering acceleration value at the current moment falls into a preset instantaneous feathering acceleration interval or not if the current moment feathering speed value of the card feathers falls into a first preset instantaneous feathering speed value interval but does not fall into a second preset instantaneous feathering speed value interval; if the feathering acceleration value at the current moment does not fall into a preset instant feathering acceleration value interval, the feathering acceleration judging device judges that the current blade has a blade clamping fault; otherwise, judging that the blade is not blocked at present;
wherein the second preset instantaneous feathering angle value interval is included in the first preset instantaneous feathering angle value interval, and the second preset instantaneous feathering speed value interval is included in the first preset instantaneous feathering speed value interval; the feathering angle value at the current moment of the oar clamping is the pitch angle when the oar changing/feathering action is finished or the oar changing/feathering action is stopped because of the oar clamping, and the feathering speed value at the current moment and the feathering acceleration value at the current moment are the feathering speed and the feathering acceleration at the moment when the oar changing/feathering action is finished or the oar clamping is stopped because of the oar clamping respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; otherwise, the wind turbine generator and the variable pitch system thereof operate normally.
As a further improvement of the technology, the feathering angle value of the current time of the paddle clamping falls into a first preset instantaneous feathering angle value interval, including the end point position falling into the interval; and the second preset instant feathering speed value interval is smaller than the first preset instant feathering speed value interval.
The invention also comprises the following technical scheme:
a method for identifying blade clamping failure and increasing power output of a wind turbine generator system is based on blade clamping and blade ductility clamping identification of blade clamping failure of a variable pitch driver, the wind turbine generator system comprises blades and a variable pitch system, the variable pitch system comprises a variable pitch driving system and a variable pitch control system, and the method is characterized in that: the method comprises the following steps:
if the feathering angle value at the current moment of blade clamping does not fall into a first preset instantaneous feathering angle value interval, determining that the blade clamping fault occurs on the current blade;
if the feathering angle value of the current feathering time of the card oar falls into a first preset instantaneous feathering angle value interval, but does not fall into a second preset instantaneous feathering angle value interval, judging whether the average speed value of the current feathering time falls into a first preset average speed value interval or not;
if the average speed value in the current feathering period does not fall into a first preset average speed value interval, determining that the current blade is subjected to ductility jamming, wherein the time-delay jamming refers to that the blade is not immediately jammed when feathering/pitch changing is finished at the current moment, but an expected jamming fault at a future moment can be generated due to continuous or intermittent unexpected resistance or unexpected thrust in the feathering/pitch changing process;
if the average speed value of the current feathering period falls into a first preset average speed value interval but does not fall into a second preset average speed value interval, judging whether the average acceleration value of the current feathering period falls into a preset average acceleration value interval or not;
if the average acceleration value of the current feathering period does not fall into the interval of the average acceleration value of the preset feathering period, determining that the ductility of the current blade is blocked; otherwise, ductility propeller clamping is determined when the current blade does not occur.
The second preset instantaneous feathering angle value interval is contained in the first preset instantaneous feathering angle value interval, and the second preset average speed value interval is contained in the first preset average speed value interval; the current-time feathering angle value of the blade jamming is the pitch angle when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming, and the average speed value in the current feathering period and the average acceleration value in the current feathering period are the average feathering speed and the average feathering acceleration in the feathering period when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; when ductility propeller clamping is judged to occur when the wind turbine generator blades are blocked, the wind turbine generator and a variable propeller system of the wind turbine generator normally operate, and the variable propeller control system does not send a restarting instruction to the variable propeller driving system so as to increase power output of the wind turbine generator.
Based on the method, the invention also comprises a device for identifying the blade clamping failure and increasing the power output of the wind turbine generator, wherein the wind turbine generator comprises a blade and a variable pitch system, the system identifies the blade clamping failure and the blade ductility clamping failure based on a variable pitch driver, the variable pitch system comprises a variable pitch driving system and a variable pitch control system, and the device is characterized in that: further comprising:
the feathering angle judging device judges that the current blade has a blade jamming fault if the feathering angle value at the current moment of blade jamming does not fall into a first preset instantaneous feathering angle value interval;
the feathering average speed judging device judges whether the average speed value of the current feathering period falls into a first preset average speed value range or not if the feathering angle value of the current time of the feathering falls into a first preset instant feathering angle value range but does not fall into a second preset instant feathering angle value range;
if the average speed value of the current feathering period does not fall into a first preset average speed value interval, the feathering average speed judgment device judges that the current blade is blocked in a ductility manner, wherein the delayed blocking manner means that the blade is not blocked immediately, but an expected blocking failure at a certain time in the future can be generated because of continuous or intermittent unexpected resistance or unexpected thrust applied in the feathering/pitching process;
the feathering average acceleration judging device judges whether the average acceleration value of the current feathering period falls into a preset average acceleration value interval or not if the average speed value of the current feathering period falls into a first preset average speed value interval but does not fall into a second preset average speed value interval;
if the average acceleration value of the current feathering period does not fall into the interval of the average acceleration value of the preset feathering period, the feathering average acceleration judging device judges that the ductility of the current blade is blocked; otherwise, judging that the blade is not blocked in a ductility manner when the current blade is not generated;
the second preset instantaneous feathering angle value interval is contained in the first preset instantaneous feathering angle value interval, and the second preset average speed value interval is contained in the first preset average speed value interval; the current-time feathering angle value of the blade jamming is the pitch angle when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming, and the average speed value in the current feathering period and the average acceleration value in the current feathering period are the average feathering speed and the average feathering acceleration in the feathering period when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; when ductility propeller clamping is judged to occur when the wind turbine generator blades are blocked, the wind turbine generator and a variable propeller system of the wind turbine generator normally operate, and the variable propeller control system does not send a restarting instruction to the variable propeller driving system so as to increase power output of the wind turbine generator.
The invention has the following beneficial effects:
1. according to the technical scheme, a blade-jamming fault factor is introduced, whether a blade of the wind turbine generator is jammed or not is determined according to the obtained variable-pitch operation parameters, and the blade-jamming fault factor specifically comprises a current-moment feathering angle value of the blade, a current-moment feathering speed value of the blade, a current-moment feathering acceleration value of the blade, an average speed of the feathering period and an average acceleration of the feathering period. Whether the wind turbine generator system has the jammed propeller fault or not is accurately determined by judging whether the jammed propeller fault factor falls into the corresponding preset value interval or not and/or based on the time-delay jammed propeller state information, or only the time-delay jammed propeller is determined, and whether the wind turbine generator system or the variable-pitch driving system needs to be restarted or not is determined. Compared with the problems of single evaluation method, low accuracy of paddle clamping identification and low wind energy utilization rate in the prior art, the method provided by the invention has the advantages that the accuracy of paddle clamping identification is improved, unnecessary shutdown maintenance is reduced, and finally the power output is increased.
2. The invention determines whether the jamming fault occurs by setting a plurality of preset angle intervals, instantaneous speed intervals and instantaneous acceleration intervals and judging whether the angle values, the instantaneous speed values and the instantaneous acceleration values fall into the intervals or not, and determines the jamming fault based on the existing feathering angle judgment.
3. According to the invention, the average speed value and the average acceleration value of the feathering/pitch changing period are introduced, so that even under the condition that the feathering angle/pitch changing angle accords with the expected pitch angle when the feathering/pitch changing is finished, due to the occurrence of unexpected unstable working conditions in the feathering/pitch changing process, the current ductility is blocked, a worker can identify and maintain the fault in advance, and meanwhile, the key real-time attention and the real-time detection rate of the pitch changing action in the future time period are improved, so that unnecessary safety risks are avoided.
Drawings
Fig. 1 is a flowchart of the steps related to the determination of the malfunction of the paddle in the first embodiment.
Fig. 2 is a flowchart of the steps of determining a paddle jam and a time-delayed paddle jam in the second embodiment.
Fig. 3(a) is a schematic diagram of the interval where the feathering angle value at the current moment of the paddle-jamming falls into the first preset instantaneous feathering angle value.
Fig. 3(b) is a schematic diagram of the interval where the average speed value of the current feathering period falls into the first preset average speed value.
Detailed Description
The present invention provides the following embodiments:
the first implementation mode comprises the following steps:
a control method for identifying and eliminating blade clamping faults of a wind turbine generator blade comprises the wind turbine generator, wherein the wind turbine generator comprises a blade and a variable pitch system, the variable pitch system comprises a variable pitch driving system and a variable pitch control system, and the control method comprises the following steps:
if the feathering angle value alpha at the current moment of blade clamping does not fall into a first preset instantaneous feathering angle value interval [ beta 1, beta 2], namely alpha is greater than beta 2 or alpha is less than beta 1, determining that the blade clamping fault occurs on the current blade; before the pitch/feathering operation is implemented, the feathering/pitch angle beta is usually set, but in consideration of micro-vibration under actual working conditions, system signal lag and instability of a pitch transmission component, [ beta 1, beta 2] is set as a pitch/feathering angle allowable interval value, namely as long as the interval is within the interval, the pitch/feathering is still determined to meet the requirement, the operation is considered to be normal, the upper limit value and the lower limit value of the interval usually do not differ too much from the target value, namely, the interval is usually | alpha-beta 1| <1.5 degrees and | alpha-beta 2| <1.5 degrees, and the specific numerical values of the interval are different according to the size and the model of the wind turbine generator.
If the feathering angle value alpha of the current moment of the card oar falls into a first preset instantaneous feathering angle value interval [ beta 1, beta 2] but does not fall into a second preset instantaneous feathering angle value interval [ gamma 1, gamma 2], namely beta 1 is more than or equal to alpha and less than or equal to gamma 1 or gamma 2 is more than or equal to alpha and less than or equal to beta 2, judging whether the feathering angle value alpha of the current moment of the card oar falls into the first preset instantaneous feathering speed interval [ v1, v2 ]; the second preset instantaneous feathering angle value interval is added for further judging whether the feathering angle value at the current moment of the feathering of the card falls into the corresponding preset interval or not; if the feathering speed value v of the current moment of the blade jamming does not fall into a first preset instantaneous feathering speed value interval [ v1, v2], namely v > v2 or v < v1, determining that the blade jamming fault occurs on the current blade (because the occurrence of the expected blade jamming is directly reflected on whether the variable pitch angle reaches a preset range or not and is indirectly reflected on the variable pitch speed value of the whole period, and the actual variable pitch speed value exceeds the expected variable pitch speed value by a certain range, determining that the blade jamming or the blade jamming risk still exists even if the variable pitch angle meets the requirement); the second preset instant feathering angle value interval [ gamma 1, gamma 2] is set to accurately judge whether blade jamming occurs, and the second preset instant feathering angle value interval [ gamma 1, gamma 2] is smaller than the first preset instant feathering angle value interval [ beta 1, beta 2], so that the second preset instant feathering angle value interval with a smaller range is added on the basis of the first preset instant feathering angle value interval, the size of the actual pitch angle and the preset pitch angle interval is convenient to be more accurately compared, and the jamming identification accuracy is improved.
If the current moment feathering speed value v of the paddle card falls into a first preset instant feathering speed value interval [ v1, v2] but does not fall into a second preset instant feathering speed value interval [ v1 ', v2 ' ], namely v1 ' is more than or equal to v1 ' or v2 is more than or equal to v2 ', whether the current moment feathering acceleration value a falls into a preset instant feathering acceleration interval [ a1, a2] is judged; if the feathering acceleration value a at the current moment does not fall into a preset instantaneous feathering acceleration value interval [ a1, a2], namely a > a2 or a < a1, determining that the current blade has a blade-locking fault; otherwise, judging that the blade is not blocked at present; even if the variable pitch angle value meets the expected requirement, the device can be easily disabled due to the instant start and stop of the variable pitch driving device and the transmission device at the moment, and the failure can not be reflected on the variable pitch result, so that the variable pitch system is pre-protected by setting the first and second preset instant feathering speed value intervals, and the continuous pitch jamming or failure caused by no important attention during the next start-up is prevented. The variable pitch acceleration is a time derivative of the variable pitch speed, and the speed change speed is reflected, so that the probability of the occurrence of the pitch jam and the reliability of continuous normal operation can be expected by using the acceleration value after the variable pitch operation is finished.
Wherein the second predetermined instantaneous feathering angle value interval [ γ 1, γ 2] is included in the first predetermined instantaneous feathering angle value interval [ β 1, β 2], and the second predetermined instantaneous feathering speed value interval [ v1 ', v 2' ] is included in the first predetermined instantaneous feathering speed value interval [ v1, v2 ]; the feathering angle value alpha at the current moment of the oar clamping is the pitch angle when the oar changing/feathering action is finished or the oar changing/feathering action is stopped because of the oar clamping, and the feathering speed value v and the feathering acceleration value a at the current moment are the feathering speed and the feathering acceleration at the moment when the oar changing/feathering action is finished or the oar clamping is stopped because of the oar clamping respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; otherwise, the wind turbine generator and the variable pitch system thereof operate normally.
As a further improvement of the technology, the feathering angle value of the current time of the paddle clamping falls into a first preset instantaneous feathering angle value interval, including the end point position falling into the interval; and the second preset instant feathering speed value interval is less than or equal to the first preset instant feathering speed value interval.
Fig. 3(a) illustrates a case where the angle value falls within the corresponding preset interval. Fig. 3(a) is a first preset instantaneous feathering angle value interval ═ AOB, the interval range is (-5 °,5 °), or preferably (-3.5 °,3.5 °), and if the feathering angle value at the current moment of chucking falls into the interval, the value is within the interval, and the central line of the interval is the theoretical case without angle error. The situations that the feathering angle value of the current moment of the paddle clamping falls into a second preset instant feathering angle value interval and the corresponding speed value/acceleration value falls into a corresponding preset interval are similar to the above, and are not described again here.
In order to realize the control method, the invention also comprises a control system for identifying the blade clamping fault and eliminating the blade clamping fault of the wind turbine generator, which comprises the wind turbine generator, wherein the wind turbine generator comprises a blade and a variable pitch system, and the variable pitch system comprises a variable pitch driving system and a variable pitch control system; further comprising:
the feathering angle judging device judges that the current blade has a blade jamming fault if the feathering angle value at the current moment of blade jamming does not fall into a first preset instant feathering angle value interval [ beta 1, beta 2 ];
the feathering speed judging device judges whether the feathering speed value at the current moment of the paddle card falls into a first preset instantaneous feathering speed interval [ beta 1, beta 2] or not falls into a second preset instantaneous feathering angle interval [ gamma 1, gamma 2] or not; if the feathering speed value at the current moment of the blade locking does not fall into a first preset instantaneous feathering speed value interval [ v1, v2], the feathering speed judgment device judges that the blade locking fault occurs at the current blade;
the method comprises the following steps that a feathering acceleration judging device judges whether the feathering acceleration value at the current moment falls into a preset instantaneous feathering acceleration interval [ a1, a2] or not if the feathering speed value at the current moment of the paddle card falls into a first preset instantaneous feathering speed value interval [ v1, v2] but does not fall into a second preset instantaneous feathering speed value interval [ v1 ', v 2' ]; if the feathering acceleration value at the current moment does not fall into a preset instant feathering acceleration value interval [ a1, a2], the feathering acceleration judging device judges that the current blade has a blade-clamping fault; otherwise, judging that the blade is not blocked at present;
wherein the second preset instantaneous feathering angle value interval is included in the first preset instantaneous feathering angle value interval, and the second preset instantaneous feathering speed value interval is included in the first preset instantaneous feathering speed value interval; the feathering angle value alpha at the current moment of the oar clamping is the pitch angle when the oar changing/feathering action is finished or the oar changing/feathering action is stopped because of the oar clamping, and the feathering speed value v and the feathering acceleration value a at the current moment are the feathering speed and the feathering acceleration when the oar changing/feathering action is finished or the oar clamping is stopped respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; otherwise, the wind turbine generator and the variable pitch system thereof operate normally.
Fig. 3(a) illustrates a case where the angle value falls within the corresponding preset interval. Fig. 3(a) is a first preset instantaneous feathering angle value interval ═ AOB, the interval range is (-5 °,5 °), or preferably (-3.5 °,3.5 °), and if the feathering angle value at the current moment of chucking falls into the interval, the value is within the interval, and the central line of the interval is the theoretical case without angle error. The situations that the feathering angle value of the current moment of the paddle clamping falls into a second preset instant feathering angle value interval and the corresponding speed value/acceleration value falls into a corresponding preset interval are similar to the above, and are not described again here.
The second embodiment:
the invention also comprises a method for identifying the blade clamping failure and increasing the power output of the wind turbine generator, which comprises the wind turbine generator, wherein the wind turbine generator comprises a blade and a variable pitch system, the variable pitch system comprises a variable pitch driving system and a variable pitch control system, and the method is characterized in that: the method comprises the following steps:
if the feathering angle value alpha at the current moment of blade clamping does not fall into a first preset instantaneous feathering angle value interval [ beta 1, beta 2], namely alpha is greater than beta 2 or alpha is less than beta 1, determining that the blade clamping fault occurs on the current blade;
if the feathering angle value alpha of the current moment of the propeller clamping falls into a first preset instantaneous feathering angle value interval [ beta 1, beta 2] but does not fall into a second preset instantaneous feathering angle value interval [ gamma 1, gamma 2], namely, beta 1 is more than or equal to alpha and less than or equal to gamma 1 or gamma 2 is more than or equal to alpha and less than or equal to beta 2, judging whether the average speed value u of the current feathering period falls into a first preset average speed value interval [ u1, u2 ];
if the average speed value u of the current feathering period does not fall into a first preset average speed value interval [ u1, u2], determining that the current blade is subjected to time-delay feathering, wherein the time-delay feathering refers to that the blade is not immediately feathered when the feathering/pitching at the current moment is finished, but an expected feathering fault at a certain future moment can be generated due to continuous or intermittent unexpected resistance or unexpected thrust applied in the feathering/pitching process;
this is usually because the cause of the faults of the pitch drive, transmission or other related devices occurs during the feathering/pitch changing process, and these faults are not enough to cause immediate blade jam, so the time-delay blade jam judgment at this time is very important.
If the average speed value u of the current feathering period falls into a first preset average speed value interval [ u1, u2] but does not fall into a second preset average speed value interval [ u1 ', u2 ' ], judging whether the average speed value a ' of the current feathering period falls into a preset average acceleration value interval [ a1 ', a2 ' ];
if the average acceleration value a ' of the current feathering period does not fall into a preset average acceleration value interval [ a1 ', a2 ' ], determining that the current blade is ductility-locked when the current blade occurs; otherwise, ductility propeller clamping is determined when the current blade does not occur.
Wherein the second predetermined instantaneous feathering angle value interval [ γ 1, γ 2] is included in the first predetermined instantaneous feathering angle value interval [ β 1, β 2], and the second predetermined average speed value interval [ u1 ', u 2' ] is included in the first predetermined average speed value interval [ u1, u2 ]; the current-time feathering angle value alpha of the blade jamming is the pitch angle when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming, and the current average speed value u and the current average acceleration value a' of the feathering period are respectively the average feathering speed and the average feathering acceleration in the feathering period when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; when ductility propeller clamping is judged to occur when the wind turbine generator blades are blocked, the wind turbine generator and a variable propeller system of the wind turbine generator operate normally, and the variable propeller control system does not send a restarting instruction to the variable propeller driving system so as to keep normal operation and increase power output of the wind turbine generator.
Particularly, the instability of a variable pitch system is directly reflected by the abnormity of the variable pitch speed or the variable pitch acceleration during the variable pitch/feathering period, the high risk of the blocking of the pitch is realized, and even if the variable pitch/feathering is successful at this time, the hidden danger of the variable pitch failure at a certain time in the future is hidden, so that an unexpected blocking fault is generated, and the ductility blocking of the pitch is realized during the setting, so that the reduction of the output power of the unit caused by the direct shutdown and restart can be avoided on one hand, and on the other hand, the fault can be conveniently marked by technical personnel, so that the position where the hidden danger of the blocking of the pitch exists in the subsequent variable pitch/feathering operation can be monitored in real time and timely responded.
Fig. 3(b) illustrates a case where the average speed value of the current feathering period falls within the first preset average speed value interval. Fig. 3(b) shows a first preset instantaneous feathering angle value interval ≧ COD, which is (-0.15,0.15) m/s schematically, or preferably (-0.1,0.1) m/s, where the value of the current feathering period average speed value falling within the first preset average speed value interval is within the above interval, and the central line of the interval is the theoretical condition without speed error. The conditions that the average speed value of the current feathering period falls within the second preset average speed value interval and the corresponding acceleration value falls within the corresponding preset interval are similar to this, and are not described again here.
Based on the method, the invention also comprises a device for identifying the blade clamping fault and increasing the power output of the wind turbine generator, wherein the wind turbine generator comprises a blade and a variable pitch system, the variable pitch system comprises a variable pitch driving system and a variable pitch control system, and the device is characterized in that: further comprising:
the feathering angle judging device judges that the current blade has a blade jamming fault if the feathering angle value at the current moment of blade jamming does not fall into a first preset instant feathering angle value interval [ beta 1, beta 2 ];
the feathering average speed judging device judges whether the average speed value of the current feathering period falls into a first preset average speed value interval [ u1, u2] or not if the feathering angle value of the current feathering time at the time of chucking falls into a first preset instant feathering angle value interval [ beta 1, beta 2] but does not fall into a second preset instant feathering angle value interval [ gamma 1, gamma 2 ];
if the average speed value of the current feathering period does not fall into a first preset average speed value interval [ u1, u2], the feathering average speed judgment device judges that the current blade is subjected to ductility feathering, wherein the time-delay feathering refers to that the blade is not immediately feathered, but the blade is subjected to continuous or intermittent unexpected resistance or unexpected thrust in the feathering/pitching process so as to generate expected feathering failure at a certain time in the future;
a feathering average acceleration determination device, wherein if the average speed value of the current feathering period falls into a first preset average speed value interval [ u1, u2], but does not fall into a second preset average speed value interval [ u1 ', u 2' ], the feathering average acceleration determination device determines whether the average acceleration value of the current feathering period falls into a preset average acceleration value interval [ a1 ', a 2' ];
if the average acceleration value of the current feathering period does not fall into a preset average acceleration value interval [ a1 ', a 2' ], the feathering average acceleration judgment device judges that the current blade is subjected to ductility blade clamping; otherwise, judging that the blade is not blocked in a ductility manner when the current blade is not generated;
the second preset instantaneous feathering angle value interval is contained in the first preset instantaneous feathering angle value interval, and the second preset average speed value interval is contained in the first preset average speed value interval; the current-time feathering angle value of the blade jamming is the pitch angle when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming, and the average speed value in the current feathering period and the average acceleration value in the current feathering period are the average feathering speed and the average feathering acceleration in the feathering period when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; when ductility propeller clamping is judged to occur when the wind turbine generator blades are blocked, the wind turbine generator and a variable propeller system of the wind turbine generator normally operate, and the variable propeller control system does not send a restarting instruction to the variable propeller driving system so as to increase power output of the wind turbine generator.
Fig. 3(b) illustrates a case where the average speed value of the current feathering period falls within the first preset average speed value interval. Fig. 3(b) shows a first preset instantaneous feathering angle value interval ≧ COD, which is (-0.15,0.15) m/s schematically, or preferably (-0.1,0.1) m/s, where the value of the current feathering period average speed value falling within the first preset average speed value interval is within the above interval, and the central line of the interval is the theoretical condition without speed error. The conditions that the average speed value of the current feathering period falls within the second preset average speed value interval and the corresponding acceleration value falls within the corresponding preset interval are similar to this, and are not described again here.
The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The blade clamping identification method based on the fault of the variable pitch driver comprises a wind turbine generator, wherein the wind turbine generator comprises blades and a variable pitch system, the variable pitch system comprises a variable pitch driving system and a variable pitch control system, and the blade clamping identification method is characterized in that: the method comprises the following steps:
if the feathering angle value at the current moment of blade clamping does not fall into a first preset instant feathering angle value interval, determining that the blade is subjected to blade clamping failure; if the feathering angle value of the current moment of the paddle card falls into a first preset instantaneous feathering angle value interval but does not fall into a second preset instantaneous feathering angle value interval, judging whether the feathering speed value of the current moment of the paddle card falls into the first preset instantaneous feathering speed interval or not; if the feathering speed value of the current blade at the moment of blade clamping does not fall into a first preset instantaneous feathering speed value interval, determining that the blade clamping fault occurs on the current blade; if the feathering speed value at the current moment of the paddle clamping falls into a first preset instantaneous feathering speed value interval but does not fall into a second preset instantaneous feathering speed value interval, judging whether the feathering acceleration value at the current moment falls into a preset instantaneous feathering acceleration interval or not; if the feathering acceleration value at the current moment does not fall into the interval of the preset instantaneous feathering acceleration value, determining that the blade is blocked at the current moment; otherwise, judging that the blade is not blocked at present; wherein the second preset instantaneous feathering angle value interval is included in the first preset instantaneous feathering angle value interval, and the second preset instantaneous feathering speed value interval is included in the first preset instantaneous feathering speed value interval; the current-time feathering angle value of the paddle clamping is the pitch angle when the pitch changing/feathering action is finished or the pitch changing/feathering action is stopped because of the paddle clamping, and the current-time feathering speed value and the current-time feathering acceleration value are the feathering speed and the feathering acceleration when the pitch changing/feathering action is finished or the pitch changing/feathering action is stopped because of the paddle clamping respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; otherwise, the wind turbine generator and the variable pitch system thereof operate normally.
2. The identification method according to claim 1, characterized in that: the feathering angle value of the current moment of the paddle clamping falls into a first preset instantaneous feathering angle value interval, including the end point position falling into the interval; and the second preset instant feathering speed value interval is smaller than the first preset instant feathering speed value interval.
3. The blade clamping identification control system based on the fault of the variable-pitch driver comprises a wind turbine generator, wherein the wind turbine generator comprises blades and a variable-pitch system, and the variable-pitch system comprises a variable-pitch driving system and a variable-pitch control system; the method is characterized in that: further comprising:
the feathering angle judging device judges that the current blade has a blade jamming fault if the feathering angle value at the current moment of blade jamming does not fall into a first preset instantaneous feathering angle value interval; the feathering speed judging device judges whether the feathering speed value at the current moment of the paddle card falls into a first preset instantaneous feathering speed interval or not if the feathering angle value at the current moment of the paddle card falls into a first preset instantaneous feathering angle value interval but does not fall into a second preset instantaneous feathering angle value interval; if the feathering speed value of the current blade at the current moment of blade clamping does not fall into a first preset instantaneous feathering speed value interval, the feathering speed judgment device judges that the blade clamping fault occurs on the current blade; the feathering acceleration judging device judges whether the feathering acceleration value at the current moment falls into a preset instantaneous feathering acceleration interval or not if the current moment feathering speed value of the card feathering falls into a first preset instantaneous feathering speed value interval but does not fall into a second preset instantaneous feathering speed value interval; if the feathering acceleration value at the current moment does not fall into a preset instant feathering acceleration value interval, the feathering acceleration judging device judges that the current blade has a blade clamping fault; otherwise, judging that the blade is not blocked at present; wherein the second preset instantaneous feathering angle value interval is included in the first preset instantaneous feathering angle value interval, and the second preset instantaneous feathering speed value interval is included in the first preset instantaneous feathering speed value interval; the feathering angle value at the current moment of the oar clamping is the pitch angle when the oar changing/feathering action is finished or the oar changing/feathering action is stopped because of the oar clamping, and the feathering speed value at the current moment and the feathering acceleration value at the current moment are the feathering speed and the feathering acceleration when the oar changing/feathering action is finished or the oar changing/feathering action is stopped because of the oar clamping respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; otherwise, the wind turbine generator and the variable pitch system thereof operate normally.
4. The control system of claim 3, wherein: the feathering angle value of the current moment of the paddle clamping falls into a first preset instantaneous feathering angle value interval, including the end point position falling into the interval; and the second preset instant feathering speed value interval is smaller than the first preset instant feathering speed value interval.
5. Blade jam and blade ductility jam recognition method based on become oar driver trouble, this method can be to wind turbine generator system blade jam oar trouble and increase power output, wind turbine generator system includes blade and becomes oar system, it becomes oar system including becoming oar actuating system and become oar control system, its characterized in that: the method comprises the following steps:
if the feathering angle value at the current moment of blade clamping does not fall into a first preset instantaneous feathering angle value interval, determining that the blade clamping fault occurs on the current blade; if the feathering angle value of the current feathering time of the card oar falls into a first preset instantaneous feathering angle value interval, but does not fall into a second preset instantaneous feathering angle value interval, judging whether the average speed value of the current feathering time falls into a first preset average speed value interval or not;
if the average speed value in the current feathering period does not fall into a first preset average speed value interval, determining that the current blade is subjected to ductility blade jamming, wherein the time-delay blade jamming means that the blade is not immediately jammed when feathering/pitch changing is finished at the current moment, but an expected blade jamming fault at a certain future moment can be generated due to continuous or intermittent unexpected resistance or unexpected thrust applied in the feathering/pitch changing process; if the average speed value of the current feathering period falls into a first preset average speed value interval but does not fall into a second preset average speed value interval, judging whether the average acceleration value of the current feathering period falls into a preset average acceleration value interval or not; if the average acceleration value of the current feathering period does not fall into the interval of the average acceleration value of the preset feathering period, determining that the ductility of the current blade is blocked; otherwise, judging that the blade is not blocked in a ductility manner when the current blade is not generated; wherein the second preset instantaneous feathering angle value interval is included in the first preset instantaneous feathering angle value interval, and the second preset average speed value interval is included in the first preset average speed value interval; the current-time feathering angle value of the blade jamming is the pitch angle when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming, and the average speed value in the current feathering period and the average acceleration value in the current feathering period are the average feathering speed and the average feathering acceleration in the feathering period when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; when ductility propeller clamping is judged to occur when the wind turbine generator blades are blocked, the wind turbine generator and a variable propeller system of the wind turbine generator normally operate, and the variable propeller control system does not send a restarting instruction to the variable propeller driving system so as to increase power output of the wind turbine generator.
6. The identification method according to claim 5, wherein: the feathering angle value of the current moment of the paddle clamping falls into a first preset instantaneous feathering angle value interval, including the end point position falling into the interval; and the second preset average speed value interval is smaller than the first preset average speed value interval.
7. Become blade card oar and blade ductility card oar recognition control device when oar based on become oar driver trouble, including wind turbine generator system, wind turbine generator system includes blade and becomes oar system, it becomes oar system including becoming oar actuating system and become oar control system, its characterized in that: further comprising: the feathering angle judging device judges that the current blade has a blade jamming fault if the feathering angle value at the current moment of blade jamming does not fall into a first preset instantaneous feathering angle value interval; the feathering average speed judging device judges whether the average speed value of the current feathering period falls into a first preset average speed value interval or not if the feathering angle value of the current time of the chucking feathering falls into a first preset instant feathering angle value interval but does not fall into a second preset instant feathering angle value interval; if the average speed value of the current feathering period does not fall into a first preset average speed value interval, the feathering average speed judgment device judges that the current blade is blocked in a ductility manner, wherein the delayed blocking manner means that the blade is not blocked immediately, but an expected blocking failure at a certain time in the future can be generated because of continuous or intermittent unexpected resistance or unexpected thrust applied in the feathering/pitching process; the feathering average acceleration judging device judges whether the average acceleration value of the current feathering period falls into a preset average acceleration value interval or not if the average speed value of the current feathering period falls into a first preset average speed value interval but does not fall into a second preset average speed value interval; if the average acceleration value of the current feathering period does not fall into the interval of the average acceleration value of the preset feathering period, the feathering average acceleration judging device judges that the ductility of the current blade is blocked; otherwise, judging that the blade is not blocked in a ductility manner when the current blade is not generated; the second preset instantaneous feathering angle value interval is contained in the first preset instantaneous feathering angle value interval, and the second preset average speed value interval is contained in the first preset average speed value interval; the current-time feathering angle value of the blade jamming is the pitch angle when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming, and the average speed value in the current feathering period and the average acceleration value in the current feathering period are the average feathering speed and the average feathering acceleration in the feathering period when the blade changing/feathering action is finished or the blade changing/feathering action is stopped due to the blade jamming respectively; when the blade of the wind turbine generator is judged to have a blade clamping fault, the variable pitch control system sends a command to restart the variable pitch driving system; when ductility propeller clamping is judged to occur when the wind turbine generator blades are blocked, the wind turbine generator and a variable propeller system of the wind turbine generator normally operate, and the variable propeller control system does not send a restarting instruction to the variable propeller driving system so as to increase power output of the wind turbine generator.
8. The control device according to claim 7, characterized in that: the feathering angle value of the current moment of the paddle clamping falls into a first preset instantaneous feathering angle value interval, including the end point position falling into the interval; and the second preset average speed value interval is smaller than the first preset average speed value interval.
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| CN101660493B (en) * | 2008-08-29 | 2014-10-01 | 维斯塔斯风力系统有限公司 | Pitch control system for testing pitch system failure |
| DE102011002805A1 (en) * | 2011-01-18 | 2012-07-19 | Bayerische Motoren Werke Aktiengesellschaft | A method for detecting errors in an electronically controlled drive system of a motor vehicle |
| CN102619682B (en) * | 2011-01-30 | 2014-05-14 | 华锐风电科技(集团)股份有限公司 | Variable pitch control system for wind generating set |
| CN103266987B (en) * | 2013-05-22 | 2015-05-20 | 北京金风科创风电设备有限公司 | Wind driven generator stopping method under single blade clamping working condition |
| CN104595112B (en) * | 2013-10-30 | 2018-01-16 | 通用电气公司 | Wind turbine and the method for assessing its blade health status |
| DK2886856T3 (en) * | 2013-12-20 | 2020-01-02 | Siemens Gamesa Renewable Energy As | Detection of pitch angle adjustment error |
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| DE102015010686A1 (en) * | 2015-08-19 | 2017-02-23 | Senvion Gmbh | Method and system for monitoring a single blade adjustment of a wind energy plant |
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| CN110094296B (en) * | 2018-01-29 | 2020-06-09 | 江苏金风科技有限公司 | Yaw control method and device of wind generating set under typhoon |
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| CN110925137A (en) * | 2019-12-13 | 2020-03-27 | 北京三力新能科技有限公司 | Shutdown feathering method for large wind turbine generator system with blade jamming fault |
| CN111878310A (en) * | 2020-08-25 | 2020-11-03 | 成都阜特科技股份有限公司 | Feathering control device, hardware safety chain, system and wind generating set thereof |
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