The distribution network is the key power supply link for connecting the power system directly to the users.In the power transmission line the series compensation technology using series capacitor compensation device for line compensation can improve system stability.Series compensation in the distribution grid can change R-L-C parameters of line

improve effectively the voltage quality along the line

but the access of series compensation will affect the transient process of the distribution network.Therefore

it is necessary to study the transient operation characteristics of series compensation particular the short-circuit fault the occurrence provability in the first place.In this paper

a typical 10 kV distribution line in Shaanxi is taken as an example and based on the previous study results

the electromagnetic transient process and its influence under different short-circuit faults of the line is calculated and analyzed under the most optimal series compensation installation position of line and compensation degree.The influence law and protection effect of the configuration parameters of the series-compensated capacitor protection device on the transient process are obtained.