Overvoltage transition model for a single-phase fault in a Wind-Photovoltaic-Battery hybrid system caused by a lightning strike

Abstract:
The unavoidable overvoltage from lightning will intrude Wind-Photovoltaic-Battery Hybrid System (WPB-HS) through any of the multiple vulnerable ports and bring fault to subsystem or even trigger the instability of hybrid system. This poses great concerns, especially to battery subsystem, which operates in low voltage and is extremely sensitive as containing chemical substances and charge storage. Therefore, based on the proposed Transient Overvoltage Model of WPB-HS to lightning strikes, we first refine the PV model by considering the installation bracket. Then, two singlephase fault scenarios caused by lightning strikes is studied to address the concern how every subsystem responds to overvoltage transition. Results show that, under the two scenarios of single-phase fault, the highest overvoltage peaks occur in the wind subsystem at the low-voltage side and can reach 0.432 kV and 0.134 kV, respectively. This work offers a viable model to estimate the fault overvoltage transition of WPB-HS caused by lightning strikes.