Troubleshooting of the hottest wind turbine

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Wind turbine troubleshooting

with the increase of the type and number of wind turbines, the continuous operation of new units and the aging of old units, the daily operation and maintenance of wind turbines is also becoming more and more important. Now the operation and maintenance of the fan are discussed

the control system of the wind turbine is controlled by an industrial microprocessor, which is generally operated in parallel by multiple CPUs. Its own anti-interference ability is strong, and it is connected to the computer through the communication line, which can be controlled remotely, which greatly reduces the workload of operation. Therefore, the operation of the fan is to conduct remote troubleshooting, statistical analysis of operation data and failure cause analysis

1. remote troubleshooting

most of the faults of the fan can be controlled by remote reset and automatic reset. The operation of the fan is closely related to the power quality. In order to carry out two-way protection, the fan is set with multiple protection faults, such as high and low electric voltage, high and low electric frequency. These faults can be reset automatically. Due to the uncontrollability of wind energy, the limit value of over wind speed can also be reset automatically. In addition, the limit value of temperature can also be reset automatically, such as high generator temperature, high and low gearbox temperature, and low ambient temperature. The overload fault of the fan can also be reset automatically

in addition to the fault of automatic reset, other remote reset control faults can be caused by the following reasons:

(1) fan controller false alarm fault

(2) misoperation of each detection sensor

(3) the controller believes that the fan is not reliable

2. Statistical analysis of operation data

detailed statistical analysis of the situation of wind farm equipment in operation is an important content of wind farm management. Through the statistical analysis of operation data, the operation and maintenance work can be assessed and quantified, and it can also provide an effective theoretical basis for the design of wind farms, the evaluation of wind resources, and the selection of equipment

the monthly power generation statistical report is one of the important contents of operation work, and its true reliability is directly linked to economic benefits. Its main contents include: monthly power generation of the fan, field power consumption, normal working time of the fan equipment, fault time, standard utilization hours, power outage, fault time, etc

the statistics and analysis of the power curve data of the fan can provide a practical basis for the fan in improving the output and the utilization rate of wind energy. For example, after analyzing the power curve of domestic fans, we adjusted the installation angle of the last three fans, reduced the output in the high wind speed area, and improved the utilization rate in the low wind speed area. It can be clearly seen from the experimental force deformation (or stress-strain) curve of the metal material tensile testing machine that the excessive faults and generator over temperature faults are reduced, and the availability of the equipment is improved. Through the statistics and analysis of wind condition data, we have mastered the output law of various types of fans with seasonal changes, and based on this, we can formulate a reasonable regular maintenance schedule to reduce the waste of wind resources

3. analysis of fault causes

through in-depth analysis of various faults of the fan, we can reduce the time for troubleshooting or prevent multiple faults. Countries around the world have widely regarded additive manufacturing as a new growth point for future industrial development, reduce downtime, and improve equipment integrity and availability. For example, through the analysis of the overload of the yaw motor of 150KW fan, we know that there are many reasons for the occurrence of the fault. First, there are mechanical reasons for the overload caused by the wear of the motor output shaft and key block, the overload caused by the change of the yaw slipper clearance, the overload of the yaw motor caused by the broken teeth of the yaw big gear plate, and the electrical reasons for the overload include the damage of the soft deviation module, the damage of the soft deviation trigger plate, and the damage of the yaw contactor, The yaw electromagnetic brake works abnormally, etc. For another example, in the analysis of the failure of Jacobs series fan control voltage disappearance, we used the elimination experiment method to transform the circuit of the measuring signal elements in the safety chain that may cause the failure with signal relays and short wires. Finally, the cause of the failure was located on the setting of the overspeed pressure switch, which reduced the occurrence of the failure, improved the utilization rate of the equipment, and reduced the replacement times of the brake pad, Reduced operating costs

wind turbine is a comprehensive product integrating electrical, mechanical, aerodynamics and other disciplines, and all parts are closely linked. The quality of wind turbine maintenance directly affects the amount of power generation and economic benefits; The performance of the wind turbine itself should also be maintained through maintenance. Timely and effective maintenance can find hidden troubles, reduce the occurrence of faults, and improve the efficiency of the wind turbine

fan maintenance can be divided into regular maintenance and daily troubleshooting maintenance

1. regular maintenance of fans

regular maintenance can keep the equipment in the best condition and prolong the service life of fans. The main contents of regular maintenance include: bolt torque inspection between fan connectors (including electrical connection), lubrication between transmission parts and various function tests

when the fan is in normal operation, the bolts of the connecting parts are easily loosened due to the long-term operation of the resultant force of various vibrations. In order not to cause the uneven stress of local bolts to be sheared after loosening, we must regularly check the bolt torque. When the ambient temperature is lower than -5 ℃, the torque should be reduced to 80% of the rated torque for fastening, and recheck after the temperature is higher than -5 ℃. Generally, the tightening inspection of bolts is arranged in the summer when there is no wind or little wind, so as to avoid the high output season of the fan

the lubrication system of the fan mainly includes thin oil lubrication (or mineral oil lubrication) and dry oil lubrication (or grease lubrication). The gearbox and yaw reduction gearbox of the fan are lubricated with thin oil. The maintenance method is to supplement and sample for testing. If the test results show that the lubricating oil can no longer be used, replace it. Dry oil lubricated components include generator bearings, yaw bearings, yaw teeth, etc. These components are easy to deteriorate due to high operating temperature, resulting in bearing wear. During regular maintenance, they must be supplemented every time. In addition, the supplementary dosage of the generator bearing must be added according to the required quantity, not too much, to prevent too much from squeezing into the motor winding and burning the motor

the function tests of regular maintenance mainly include overspeed test, emergency shutdown test, constant value test of various components of the hydraulic system, vibration switch test, and twist cable switch test. Some routine tests can also be carried out on the limit setting of the controller

in addition to the above three items, regular maintenance should also check the hydraulic oil level, whether each sensor is damaged, whether the power supply of the sensor works reliably, and the wear of the brake pad and disc

2. Daily troubleshooting maintenance

during the operation of the fan, there will be some faults that must be handled on site, so that we can carry out routine maintenance by the way. First of all, carefully observe whether the safety platform and ladder in the fan are firm, whether the connecting bolts are loose, whether there is paste smell in the control cabinet, whether the cable is displaced, whether the splint is loose, whether the pull ring of the twist cable sensor is worn and broken, whether the lubrication of the yaw gear is dry and deteriorated, whether the oil level of the yaw gear box, hydraulic oil and gear box is normal, whether the gauge pressure of the hydraulic station is normal, and whether there is wear between the rotating parts, Check whether the oil pipe joints have leakage, and whether the indication of the gear oil and hydraulic oil filter is in the normal position. The second is to listen. Listen to whether there is a sound of discharge in the control cabinet. If there is a sound, it may be a loose connection terminal or a poor contact. It must be carefully checked. Listen to whether the sound during yaw is normal, whether there is a sound of dry grinding, whether there is abnormal noise in the generator bearing, whether there is abnormal noise in the gearbox, whether there is abnormal noise between the brake disc and the brake pad, and whether the wind cutting sound of the blade is normal. Third, clean up your work site and wipe all components and pipe joints of the hydraulic station, so as to observe whether there is leakage in the future

in order to operate and maintain the wind turbine well, it is necessary to conduct in-depth research and Study on the relevant theoretical knowledge of the wind turbine at ordinary times, carefully make various maintenance records and archives, regularly count the spare parts in stock, conduct in-depth and detailed analysis on the multiple faults of all kinds of wind turbines, and strive to prevent them effectively. Only taking preventive measures is the highest level of our operation and maintenance

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