Development of an improved H-bridge cascaded static synchronous compensator in power system

Chao Zhang; Aimin Zhang; Hang Zhang; Yunfei Bai; Chujia Guo; Yingsan Geng

doi:10.1063/1.4921912

Development of an improved H-bridge cascaded static synchronous compensator in power system

Rev Sci Instrum. 2015 Jun;86(6):064702. doi: 10.1063/1.4921912.

Authors

Chao Zhang¹, Aimin Zhang², Hang Zhang¹, Yunfei Bai¹, Chujia Guo², Yingsan Geng¹

Affiliations

¹ School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China.
² School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China.

PMID: 26133853
DOI: 10.1063/1.4921912

Abstract

This paper presents a new configuration of H-bridge cascaded static synchronous compensator (STATCOM) based on auto disturbance rejection control and modulation wave shifting control intended for installation in industrial and utility power distribution systems. It proposes an improved controller that devotes itself not only to satisfying the requirement of dynamic reactive power compensation but also to achieving the balance of DC capacitor voltage. The new configuration is prominent in having no restriction on the number of power module. Simulation results show the proposed controller exhibits better performance in terms of response time and transient stability compared with the proportion integration controller. Two actual H-bridge cascaded STATCOMs are constructed at 10 kV, 2 MVA and 380 V, 6.5 kVA, respectively, and a series of verifications test are executed in 380 V, 6.5 kVA STATCOM experimental system. The experiment results further prove that H-bridge cascaded STATCOM with the proposed controller has excellent dynamic performance and strong robustness.