Performance Comparison Of UPFC In Coordination With Optimized POD And PSS On Damping Of Power System Oscillations

This paper presents a new approach for determining the effective control signals for damping of oscillations by performance comparison of Unified Power Flow Controller in coordination with Power Oscillation Damping Controller and Power System Stabilizer. For the analysis Modified Phllips-Heffron Model of Single Machine Infinite Bus system is established with Unified Power Flow Controller. Impact of additional damping controllers like Power Oscillation Damping Controller and Power System Stabilizer are designed to achieve improved damping performance of the Single Machine Infinite Bus system by selecting effective control signals. The Power Oscillation Damping Controller parameters are optimized by using Nonlinear Control design Blockset (NCD). Investigations reveal that coordinated tuning of Unified Power Flow Controller with optimized POD parameters provide the robust dynamic performance. Eigen value analysis provides the quantitative measure for the comparative performance of additional damping signal with effective control signals Key-Words: FACTS, UPFC, POD, PSS, Damping of oscillations