Fault current and discharging current of capacitor would give more current strength to the thyristor.The transient temperature changed by the current strength is analyzed through Cauer model.

• 故障电流和电容器放电电流叠加使晶闸管阀体承受巨大的电流应力，建立晶闸管阀热阻抗模型，分析了暂态温升变化。