Modelling of a Vector-current Controlled UPFC and Comprehensive Comparison with the Power-angle Control Strategy

This paper establishes the non-linear dynamic mathematical model of the vector-current controlled unified power flow controller (UPFC) and the linearized model of the UPFC is derived in detail afterwards for the analysis of dynamic performance stability. Then, the paper carries out deep investigatio...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-05, Vol.199 (1), p.12042
Main Authors: Ren, Bixing, Du, Wenjuan, Cai, Hui, Wang, Haifeng, Wang, Xiangfeng, Zhang, Jianpeng
Format: Article
Language:English
Subjects:
Controllers
Damping
Decoupling
Dynamic stability
Mathematical models
Power flow
Stability analysis
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Summary:This paper establishes the non-linear dynamic mathematical model of the vector-current controlled unified power flow controller (UPFC) and the linearized model of the UPFC is derived in detail afterwards for the analysis of dynamic performance stability. Then, the paper carries out deep investigations on the comparison and analysis for the above two control strategies applied to the UPFC in the aspects of dynamic interaction and auxiliary damping effect. The relative gain array (RGA) method is used to assess the dynamic interactions among the multiple control functions of the UPFC, and damping torque analysis (DTA) method is used to compare the damping performance of the UPFC auxiliary damping controller. The results of quantitative comparison by RGA and DTA analysis show that the vector-current controlled UPFC exhibits better decoupling characteristic among multiple control loops, while the power-angle controlled UPFC exhibits better auxiliary damping performance. Conclusions are further validated by the non-linear simulation results via a two-area four-machine system.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/199/1/012042