测控技术2017，Vol.36Issue(9)：80-85,6.
基于下垂控制的电力电子变压器并联运行策略
Parallel Operation Control Strategy of Power Electronic Transformer Based on Droop Control
摘要
Abstract
The parallel operation of power electronic transformer (PET) is of great significance to improve the reliability and stability of power supply system.In order to solve the problems of circulation and load sharing in parallel system,the droop control theory is introduced into the control strategy of power electronic transformer in parallel,but the traditional droop control can not be applied to the low voltage power grid with large resistance.It is suggested that the equivalent output impedance of the system can be improved through the design of control parameters,which would meet the needs of droop control and improve the stability of the system.A parallel system with two PET is built in Matlab/Simulink and the simulation is carried out.Results show that the control strategy can restrain the parallel circulation and realize the reasonable distribution of load in the condition of keeping output voltage amplitude and frequency stability,and has good dynamic performance.关键词
电力电子变压器/并联运行/下垂控制/环流Key words
power electronic transformer/parallel operation/droop control/circulation current分类
信息技术与安全科学引用本文复制引用
宋立业,王兴电..基于下垂控制的电力电子变压器并联运行策略[J].测控技术,2017,36(9):80-85,6.基金项目
国家自然科学基金资助项目(50677027) （50677027）
