In recent years

the series compensation technology which has been widely used in ultra high-voltage transmission has been applied to distribution network in China

to reduce the voltage sag

improvethe voltage distribution along the line and the power quality at the end of the line.However

the effectivenessof the series compensation device of the power network needs considering the influence of each aspect andchoosing reasonably configuration scheme-compensation capacity and installation position because theynot only affect directly the compensation result of the line voltage and economic operation

but also affectsthe transient over voltage of the line

such as over voltage and over current in case of short circuit.It hasremarkable significance for the protection of serial compensation capacitor and other equipment andtherefore

the configuration scheme of the serial compensation device shall be selected reasonably inaccordance with the specific situation of the project.In this paper

a typical 10 kV radial distributionnetwork is taken as an example and the simulation calculation method by EMTP-ATP software is adopted

the calculation model of 10 kV distribution system is set up and the influence of the configuration scheme ofseries compensation device on the compensation result in case of steady operation is simulated and studied.