Analysis of Thyristor Failure in Hybrid Energy Storage System

This paper introduces a new energy storage method consists of "battery + pulse capacitor", which reduces the power requirements for shipboard railgun to power grid. First the model of hybrid energy storage is built based on the course of discharging, then peak value of the current when battery charges capacitor is calculated out by theoretical derivation, and a constant current charging method is designed. On this basis, simulation is carried out under the condition that the thyristor fails short, the results show that the failure will damage the system, based on this, this paper design a method of protecting the system from overcurrent damage.