The rapid development of economy and society has led to an increase in electricity consumption and an increasing demand for voltage quality of distribution networks. The lag in the construction of distribution networks

weaknessof grid structures

insufficiency of reactive power

long power supply radius and big load fluctuation makes the voltage quality not met the customer’s requirement and causes big loss. In this paper

the corresponding model is set up for serial and shunt configuration with consideration of application of series and shunt compensation in the power distribution grid. The improved particle swarm optimization algorithm is adopt for the solution and the example analysis is made by selecting the node of IEEEE33 distribution grid. It is shown by the result that the simultaneous application of serial and shunt compensationcanreducevoltagedeviationandactivelineloss.