• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2021, Vol. 57 ›› Issue (14): 253-260.doi: 10.3901/JME.2021.14.253

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Research on Unified Assessment Model of Wind Turbine Efficiency and Performance

DONG Xinghui1, LI Jia2, GAO Di1, ZHENG Kai1   

  1. 1. School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206;
    2. China Electric Power Research Institute, Beijing 100192
  • Received:2020-07-06 Revised:2021-03-02 Online:2021-07-20 Published:2021-09-15

Abstract: The unstable and uncertain changes of wind speed and direction make it difficult for wind turbines(WTs) to maintain a stable wind energy transition state, which directly leads to the uncertainty of power generation state of WTs. Accurately assessing the two states of energy absorption and production capacity of the wind turbines is of great significance for the formulating production, scheduling strategies and maintenance decisions. By analyzing the energy conversion process of the wind turbines, it is pointed out that the wind turbine has two existing states:explicit and implicit, and further study the two functional state characteristics of efficiency and performance of wind turbine. The cloud model is used to describe the wind turbine monitoring data, and the cloud characteristic parameters are used to quantitatively describe the expected characteristics, deviated characteristics and discrete characteristics of the unit's implicit state. The evaluation model of implicit state for wind turbines, which is embodied in Supervisory control and data acquisition(SCADA) data and brings together wind turbine's efficiency and performance, is established. The partial evaluation of the different wind speeds sections and different power parameter sections of the unit and the overall comprehensive evaluation of the entire production parameter sections are realized. The evaluation results can provide basis for production scheduling and maintenance decisions, and promote wind farm science and optimization management. Finally, the wind farm field monitoring data is used to verify the correctness and reliability of the algorithm.

Key words: wind turbines, implicit state, efficiency cloud, performance cloud, quantitative assessment

CLC Number: