Application of series capacitor compensation used in distribution line can bring about positive and notime-lag reactive compensation

and can improve the voltage quality of the line.It is load-adaptive and has the good operability.Because of the complexity and otherness of distribution lines

it is needed to know well the steady and transient characteristics

capacity

position

influencing factors about the series capacitor compensation to achieve the good result.This paper establishes a typical model of the series capacitor compensation for 10 kV radial distribution line using EMTP

and makes systematic effective analyzes such as wire diameter

load-capacity and cosφ

capacity and position to the voltage along the line.It gives the transient process results in the inside of compensa-tion device under 3 phase breakdown

and the relationship between close-time of bypass circuit breaker and absorp-tion capacity of MOV.