TY  - JOUR
AU  - Taher, Seyed Abbas 
AU  - Hematti, Reza 
AU  - Abdolalipour, Ali 
AU  - Nemati, Majid 
PY  - 2008
TI  - Decentralized Controller Design for Static Synchronous Compensator Using Robust Quantitative Feedback Theory Method 
JF  - American Journal of Engineering and Applied Sciences
VL  - 1
IS  - 1
DO  - 10.3844/ajeassp.2008.66.75
UR  - https://thescipub.com/abstract/ajeassp.2008.66.75
AB  - 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.