The Comparative Analysis of SVC and STATCOM on Subsynchronous Oscillation Mitigation

Abstract:

The methods for subsynchronous oscillation mitigation based on SVC and STATCOM are analyzed in this paper. According to the IEEE first benchmark model, the electrical damping coefficients respectively provided by SVC and STATCOM connected at the generator terminal, as well as positive damping condition, are deduced by complex torque coefficient approach. Correlative factors which influence the two positive dampings are compared. The analysis results indicate that the positive damping provided by SVC is proportional to the size of system voltage. The positive damping provided by STATCOM is not affected by the size of system voltage, which is mostly proportional to the subsynchronous voltage produced itself. The controllers of SVC and STATCOM are designed and the positive dampings separately offered by SVC and STATCOM are optimized by phase compensation with test signal method. The time domain simulation reveals that STATCOM has stronger damping ability than SVC in the case of short circuit fault.

• Periodical: Advanced Materials Research (Volumes 756-759)
• Pages: 245-249
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.756-759.245
• Online since: September 2013
• Authors: Jian Zhang, Xiang Ning Xiao, Ben Feng Gao, Chao Luo
• Keywords: Damping, STATCOM, Sub-Synchronous Oscillation (SSO), Svc, Test Signal Method

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