Power System Stabilizer Controller Design for SMIB Stability Study
Balwinder Singh Surjan1, Ruchira Garg2
1Dr. Balwinder Singh Surjan, Department, Electrical Engineering, PEC University of Technology, Chandigarh, India.
2Ms. Ruchira Garg, P.G. Student, Department, Electrical Engineering, PEC University of Technology, Chandigarh, India.
Manuscript received on September 25, 2012. | Revised Manuscript received on October 11, 2012. | Manuscript published on October 30, 2012. | PP: 209-214 | Volume-2 Issue-1, October 2012.  | Retrieval Number: A0797102112 /2012©BEIESP

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Abstract: The low frequency oscillations (LFOs) are related to the small signal stability of a power system and are detrimental to the goals of maximum power transfer and power system security. As power systems began to be operated closer to their stability limits, the weakness of a synchronizing torque among the generators was recognized as a major cause of system instability instead of damping torque. Automatic voltage regulators (AVRs) can improve the steady-state stability of the power systems. The addition of a supplementary controller into the control loop, such as power system stabilizers (PSSs) to the AVRs on the generators, provides the means to reduce the inhibiting effects of low frequency oscillations. The power system stabilizers work well at the particular network configuration and steady state conditions for which they were designed. Once conditions change the performance degrades To overcome the drawbacks of power system stabilizer (PSS), numerous techniques are available in the literature. In the present work, the effectiveness of conventional PSS and PID-PSS has been compared.
Keywords: LFOs, AVRs, PSSs, PSS, PID-PSS.