In the face of monsoon climate conditions

the high-frequency non-stationary charging and discharging of the variable pitch control system capacitor of offshore wind turbines accelerates the degradation of capacitor life

which affects the safe and stable operation of new energy power plants. Starting from the insufficient research on multi-level spare parts guarantee in this scenario

this paper proposes a capacitor life distribution function model under the degradation factor

a Weibull type capacitor equipment availability analysis model considering the electromagnetic environment impact based on the principle of equal average life

and a spare parts optimization model. By comparing the analysis results with the discrete event simulation results

the rationality

accuracy

and superiority of the model proposed in this paper have been verified. Through the optimization of spare parts configuration under the influence of electromagnetic environment

the potential huge risks of electromagnetic environment on spare parts support work are revealed. This study can also provide reference for multi-level spare parts support of existing Weibull components similar to capacitors.