In view of voltage sag

both series and parallel dynamic voltage restorers (DVRs) are presently the most mature devices. In this paper

a kind of the collaborative optimal configuration scheme of DVR of distribution network considering both series and parallel is proposed

the capacity selection is performed through comprehensively by considering the characteristic of different types of DVR

thus improving both economic performance and flexibility of the scheme. Firstly

the configuration requirement of the two devices are analyzed respectively in accordance with the operating principle of the serial and parallel DVR so to

with meeting the normal operation of the sensitive load as the premise

set up collaborative optimal configuration model of DVR of distribution network with the minimum total investment cost as the target. Then

an improved particle swarm optimization algorithm is used to solve the optimal configuration model so to obtain the optimal configuration scheme for DVR. Finally

the power supply system of a certain customer is taken as the real example

the economic performance and feasibility of the proposed series/parallel DVR collaborative optimal configuration scheme is verified.