Study On Condition Monitoring And Health Evaluation Method Of Backup Power Supply Of Supercapacitor For Wind Turbine Variable Pitch

In the practical application of wind turbine,equipped with supercapacitor modules as backup power supply of wind turbines only in the SCADA data acquisition and monitoring system for the monitoring of the supercapacitor voltage module,not the characteristics of supercapacitor monomer tracking,which fail to understand the So H of supercapacitor,which poses a potential risk to the emergency oar alignment of wind turbines.This paper aims at the above problems,a supercapacitor backup power supply condition monitoring system is designed to monitor the supercapacitor cell voltage,cell temperature and module total current during the operation of the standby power supply.Based on the monitoring data.It is proposed a data-driven supercapacitor So H evaluation method.The main research contents of this article are as follows:（1）Introducing the engineering significance of the wind power rotor supercapacitor backup power supply state monitoring and So H evaluation algorithm,summarizing the advantages and disadvantages of the current supercapacitor So H evaluation method,analyzing the structure,working principle,and supercapacitor The cause of aging,select the supercapacitor monomer voltage,monomer temperature,and total current as monitoring operation parameters.（2）With the supercapacitor backup power source,the multi-supercapacitor module distributed monitoring platform Includes multiple distributed on-site monitoring devices and host machines,and the on-site monitoring device uses a single-chip as a master chip,using CAN communication mode for data transmission;application Lab VIEW virtual instrument software design upper computer monitoring software,responsible for data display and query,etc.（3）Based on the experimental data of the whole process of supercapacitor charge and discharge obtained by the test platform,considering the importance of different attribute data to supercapacitor So H evaluation,the weight of external characteristic parameters is calculated by CRITIC method,and combined with data mining clustering method,the supercapacitor So H comprehensive evaluation index is defined.The supercapacitor So H off-line evaluation method based on mixed weighted Euclidean distance is proposed,and the So H evaluation of supercapacitors in 8 different aging stages is carried out,and the parameter characteristics are analyzed.The results show that this method can effectively characterize the health status of supercapacitors.（4）Based on the interval voltage data of the actual charging process of the wind power paddle backup power source,using the evaluation results obtained by the So H comprehensive evaluation index of mixed weighted Euclidean distance,and using the KRR method,an the KRR-based So H online evaluation method of supercapacitor is proposed.The So H of the ultracapacitors at three different aging stages was evaluated.From the results,this method can realize So H online evaluation,and the evaluation results are consistent with the evaluation results based on mixed weighted Euclidian distance.