In order to reduce the loss of 10 kV distribution line and achieve the goal of power saving

by analyzing and comparing the power losses of transmission lines with and without capacitor compensation

it is concluded that installing capacitors in the transmission system may reduce the reactive current through the transmission lines and which cut down the power losses apparently.All the data

equations and results in the paper may be used as the reference for design and operation of the reactive compensation devices for transmission lines

e.g.the equation relating the reduction rate of line losses η

the reactive power compensation degree K and the length ratio L

the capacity and location design strategy for capacitor compensator

the regulation of the compensation amount and the relation between power factor readings of electricity meter and the line losses.