Decentralized Controller Design for Static Synchronous Compensator Using Robust Quantitative Feedback Theory Method| Science Publications

American Journal of Engineering and Applied Sciences

Seyed A. Taher¹  Ali Abdolalipour¹  Majid Nemati¹  Reza Hematti¹ 

关键词: Flexible AC transmission systems;    static synchronous compensator;    power system oscillations;    quantitative feedback theory;    decentralized control;   

DOI  :  10.3844/ajeassp.2008.66.75

学科分类：工程和技术（综合）

来源: Science Publications

【 摘 要 】

The Static Synchronous Compensator (STATCOM) provides shunt compensation in similar way to the Static VAR Compensator (SVC) but utilizes a voltage source converter rather than capacitors and reactor. In practice systems use simple Proportional-Integral (PI) controllers for control of STATCOM. However, since the PI control parameters were usually tuned based on classical or trial-and-error approaches, they were incapable of obtaining good dynamic performance for a wide range of operation conditions and various loads in power system. For this problem, in this research a robust control approach based on the Quantitative Feedback Theory (QFT) method was proposed for the design of STATCOM controllers (AC-voltage regulator and DC-voltage regulator) and also supplementary damping controller for increase of power system oscillations damping is developed. A Single-Machine Infinite-Bus (SMIB) power system installed with a STATCOM with system parametric uncertainties were considered for case study. The system parametric uncertainties were obtained by changing parameters and load by 45% simultaneously from their typical values. To show effectiveness of QFT method, the proposed method is compared with a conventional method (classical P-I controller optimized by Genetic Algorithm (GA)). Several linear and non-linear time-domain simulation tests visibly show the validity of proposed method in compare with traditional method.

【 授权许可】

Unknown