Modeling and stability analysis for parallel operation of UPS with no control interconnection basing on droop characteristic

作者：Lin Xin Chun^*; Duan Shan Xu; Kang Yong; Chen Jian

来源：Proceedings of the CSEE, 2004, 24(2): 33-38.

• Active power
• Droop characteristic
• Noninterconnection lines
• Parallel operation
• Single phase UPS systems
• Small signal models

The droop characteristic is an effective control scheme for the parallel operation of UPS systems with no control interconnection. This paper presents a small-signal model for two paralleled single-phase UPS systems with the droop control scheme. Basing on the proposed small-signal model, we have analyzed the influence of various parameters on the stability of paralleled systems, which gave guides for the design of the paralleled systems'; parameters. The simulation and experimental results both confirm the validity of the proposed small-signal model.

• 出版日期2004