Design and Performance Analysis of a Robust Power System Stabilizer for Single Machine Infinite Bus using ADRC Approach
Issa Y. S. Ali1, Sedat Nazlibilek2
1Research scholar. Issa Y. S. Ali, Department of Modelling and Design of Engineering Systems, Atilim University, Ankara, Turkey, India.
2Asso. Prof. Sedat Nazlibilek, Department of Electrical and electronics Engineering, Baskent University, Ankara, Turkey, India.
Manuscript received on February 18, 2017. | Revised Manuscript received on February 26, 2017. | Manuscript published on March 05, 2017. | PP: 75-80 | Volume-7 Issue-1, March 2017. | Retrieval Number: A2964037117/2017©BEIESP
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Abstract: Due to the rapid growing demand for electricity, power systems nowadays have become operating under continually changing in loads and operating conditions which is a major cause of instabilities and could potentially result in serious consequences. This paper presents a novel design approach by employing a robust damping control of power systems based on ‘Active Disturbance Rejection Control’ (ADRC) algorithm in order to improve system stability. The advantage of this algorithm is that it requires little information from the plant model since the relative order of open loop transfer function information is quite sufficient to design a robust controller. This makes the power system more robust against a wide range of disturbances that are commonly encountered in such systems. Here, the proposed ADRC control algorithm is developed for a synchronous machine connected to infinite bus (SMIB) through external reactance under small-disturbance condition. The effectiveness of the proposed algorithm has been verified by comparing it with an optimally tuned Conventional Power System Stabilizer (CPSS) under various loading conditions. The comparison shows that the proposed approach guarantees system stability and exhibits higher performance than CPSS which lacks robustness at some severe operating points despite being optimally tuned.
Keywords: Active Disturbance Rejection Control (ADRC); Dynamic Analysis; Small Signal Stability; Power system stabilizer (PSS); Single Machine Infinite Bus (SMIB).