Wind turbine quality appraisal

wind turbine is mainly composed of wind wheel, generator, director, tower, speed limit safety mechanism and energy storage device. Its working principle is relatively simple. The wind wheel rotates under the influence of wind, converting the kinetic energy of the wind into the mechanical energy of the wind wheel shaft, and then converts it into electrical energy through the generator. In a broad sense, wind energy is also a form of solar energy, so the wind turbine can be regarded as a thermal energy utilization generator that uses solar energy and the atmosphere as the working medium.
In wind turbine quality appraisal cases, Zhongke Testing can provide wind turbine quality appraisal services.

According to the characteristics of fixed-torque stall type fans and variable-speed constant-frequency variable-torque fans, currently installed motors in China are generally divided into two categories:
1) Asynchronous type: cage-type asynchronous generator, wound-type doubly-fed asynchronous generator.
2) Synchronous type: permanent magnet synchronous generator, electric excitation synchronous generator.
According to different blade forms, existing wind turbines are divided into horizontal axis wind turbines and vertical axis wind turbines.

GB/T 19072-2022 Wind turbine tower
GB/T 17646-2017 Small wind turbine
GB/T 34524-2017 Wind turbine main shaft
GB/T 41512-2022 Distributed wind turbines
GB/T 37257-2018 Wind turbines Mechanical load measurement
GB/T 35204-2017 Wind turbines Safety manual
GB/T 33629-2017 Wind turbines Lightning protection
GB/T 32077-2015 Wind turbine pitch system
GB/T 31519-2015 Typhoon wind turbine
GB/T 29543-2013 Low temperature wind turbine
0GB/T 29494-2013 Small vertical axis wind turbine
1GB/T 25383-2010 Wind turbine turbine blade
2GB/T 25381-2010 Wind turbine series model
3GB/T 21150-2007 Stall type wind turbine
4GB/T 25385-2019 Wind turbine operation and maintenance requirements
5

A wind power generation company and a technology company have signed two "Wind Turbine Set Purchase Contracts", purchasing a total of 33 wind turbine sets. However, in the more than five years from the project's commissioning to X, month, X, the wind turbine frequently suffered blade breakage and damage, as well as damage to major equipment such as the generator, servo drive, pitch motor, yaw reducer, and gearbox, as well as serious oil leakage. The wind power company then took a technology company to the court and demanded compensation.
In order to clarify whether there are quality problems with the "wind turbine" involved in the case, the buyer filed an application for quality appraisal of the "wind turbine".
*** The court entrusted a quality appraisal agency to conduct quality appraisal of the "wind turbine" involved in the case.
appraisal analysis results:
The appraisal expert team analyzed and judged the appraisal matters involved in the "wind turbine" based on the final on-site inspection and testing conditions, combined with the collected relevant case materials and information, and gave appraisal opinions:
1. During the production process of the generator set blades involved in the case, due to the failure to effectively control product quality in accordance with relevant standards, a considerable part of the blades produced failed to meet the design quality requirements, and even failed to meet the company's clear commitment in the "Wind Turbine Set Technical Specification" that they would not need to be replaced for 20 years.
2, infer the causes of damage to the generator, gearbox and other equipment of the generator set involved in the case: First, it cannot be ruled out that these damaged equipment are related to the blade failure, that is, the quality problems of the blades cause the unit to vibrate and be damaged during operation; second, it cannot be ruled out that there are quality problems or design defects in itself or in the connections.
3. The reduced power generation due to the fault is XXXXXXXX kilowatt hours.