For reducing the impact of inrush current generated by the closing shunt capacitor in 220 kV substations to the system and improving power quality

in this paper

the mathematical model of shunt capacitor is set up in accordance with actual 220 kV substation systems. The precise closing strategy of shunt capacitor bank is obtained by calculating the minimum inrush current and effectiveness of the closing strategy is verified by simulation. The closing dispersion of mechanical switch and synchronous measurement error of voltage are analyzed. The method of reducing the error is given and the time delay in closing operation is calculated to ensure that shunt capacitor banks can close accurately at a specific time and effectively reduce the closing inrush current of shunt capacitor.