A superconducting magnetic energy storage based current-type interline dynamic voltage restorer for transient power quality enhancement of composited data center and renewable energy source power system

• Published in: Journal of energy storage 2022-08, Vol.52, p.105003, Article 105003
• Main Authors: Jin, Jian Xun, Zhou, Qian, Yang, Ruo Huan, Li, You Jin, Li, Hao, Guo, You Guang, Zhu, Jian Guo
• Format: Article
• Language: English
• Subjects: Current-source-inverter; Doubly-fed induction generator; Interline dynamic voltage restorer; Internet data center; Power quality; Superconducting magnetic energy storage
• ISSN: 2352-152X; 2352-1538
• DOI: 10.1016/j.est.2022.105003

Simultaneous protection of sensitive renewable power generators and sensitive loads under transient voltage disturbances is an urgent issue in current power systems. Most existing solutions are based on separate custom power devices and energy storage systems. To efficiently utilize renewable energy under voltage sags and reduce energy storage capacity, a current-source-inverter interline dynamic voltage restorer (CSI-IDVR) based on superconducting magnetic energy storage (SMES) is proposed. The current source topology is designed for the IDVR to obtain a more appropriate current rise limitation and fewer switches. The CSI-based voltage dual control is designed and implemented to suppress the voltage oscillations, ensuring the transient stability of the sensitive renewable power generator and sensitive loads during asymmetric grid faults. An internet data center (IDC) combined with a typical renewable energy generator, i.e., doubly-fed induction generator (DFIG), is analyzed. Under transient voltage disturbances, the proposed CSI-IDVR can maintain the appropriate voltage profiles of the DFIG and IDC. Compared to the separate DVRs, the required SMES capacity in the CSI-IDVR can be substantially reduced. The feasibility and performance of the proposed CSI-IDVR are verified by numerical simulation. •A SMES-based current-source interline DVR (CS-IDVR) is proposed.•The proposed CS-IDVR is a cost-saving solution for renewable data center.•Transient power flow among CS-IDVR, DFIG, and IDC has been analyzed.•Modeling of the SMES-based CS-IDVR is established.•Performance of the scheme is verified by simulation.