Simultaneous Tuning of Multi-Band Power System Stabilizer and Various IPFC-based Damping Controllers: An Effective method for Mitigation of Low frequency Oscillations

In this paper, coordinated tuning of three band power system stabilizer (PSS3B) with interline power flow controller (IPFC) in single machine infinite bus power system is proposed. From the dynamic model of the power system equipped with IPFC, linear Phillips-Heffron model is established. The damping controllers considering the various control signals of the IPFC designed based on linearized model. Optimal tuning of the controllers formulated as an optimization problem and solved using krill herd optimization algorithm. The eigenvalues analysis and response of the system to step change in mechanical torque used to demonstrate the effectiveness of the proposed method. Studies reveal that the most effective input signal of IPFC utilized for damping the low frequency oscillation coordinated with PSS3B is found to be the input signal m2, providing robust performance under different operation conditions.

Keywords:

PSS3B , IPFC , Krill Herd