Research On Lifecycle Cost Optimization Of Wind Turbine Blade Vibration Exciter

Wind turbine generation technology can not only meet our demand for electricity,but also promote the restoring construction of ecological environment.Therefore,the wind turbine industry has maintained developing at a high speed.Blades are an essential part of wind turbine generator system,and their new products must use vibration exciter for fatigue testing before they were put into operation,which also made the vibration exciter as a popular product.In order to further promote the developed vibration exciter on the basis of meeting the performance requirements,this paper optimizes the equipment cost based on the life-cycle costs theory.The specific studies as follows:First of all,according to the designer’s perspective,the total cost of the equipment was divided into five stages.With the characteristics of the cost of each stage,the Life-cycle Costing Based on Designer net present value analysis model was established based on the designers.For the convenience of the quantitative analysis parameters on the influence degree of cost,a two-factor sensitivity analysis method combinning sensitivity coefficient and the proportion of parameters was proposed.This model and sensitivity analysis methods were applied to the example to determine the key factors influencing the cost,which facilitated the formulation of an optimal design scheme for wind turbine blade excitation equipment,and provided a basis for decision-making on the cost of subsequent control equipment.Then,the life-cycle cost of the equipment was estimated and the cost optimization was further realized.Due to the fact that the wind turbine blade vibration exciter developed by the project team has few historical data for reference,and there are still uncertainties in the factors affecting the cost.Therefore,the Delphi prediction method was used to estimate the cost.In order to characterize the randomness of the cost factors and the uncertainty of its membership degree,the cloud model was used to calculate the distribution of the predicted values,and convert the results into a three-parameter interval gray number to make the calculation convenient,and the specific steps of establishing a cost estimation model were proposed.It was applied to estimate the total cost of vibration exciter,and the range of equipment costs was obtained,which proved the practicability of the model.Finally,based on the above research and combined with the characteristics of maintenance costs,the minimum average maintenance cost was used as the constraint condition and the lowest maintenance cost was the objective function.The mathematical model of cost optimization was constructed.The related parameters of the vibration exciter were substituted into the mathematical model.Using genetic theory to build the specific solution steps,the maintenance cycle and maintenance times that meet the requirements were obtained by MATLAB software.According to this,the total maintenance cost was calculated,which was10.73% lower than the original maintenance cost.It provided a theoretical basis for the decision-making of the maintenance plans,and the purpose of reducing the total cost of equipment was also achieved.