Inter-area and intra-area oscillation damping for UPFC in a multi-machine power system based on tuned fractional PI controllers

The well-developed unified power flow controller (UPFC) has demonstrated its capability in providing voltage support and improving power system stability. The objective of this paper is to demonstrate the capability of the UPFC in mitigating oscillations in a wind farm integrated power system by employing eigenvalue analysis and dynamic time-domain simulation approaches. For this purpose, a power oscillation damping controller (PODC) of the UPFC is designed for damping oscillations caused by disturbances in a given interconnected power system, including the change in tie-line power, the changes of wind power outputs, and others. Simulations are carried out for two sample power systems, i.e., a four-machine system and an eight-machine system, for demonstration. Numerous eigenvalue analysis and dynamic time-domain simulation results confirm that the UPFC equipped with the designed PODC can effectively suppress oscillations of power systems under various disturbance scenarios.

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Inter-Area Oscillation Damping Considering Time-Varying Communication Delay of Wide-Area Power System

10.1109/iria53009.2021.9588732 ◽

2021 ◽

Author(s):

Subrat Kumar Pradhan ◽

Dushmanta Kumar Das

Keyword(s):

Power System ◽

Communication Delay ◽

Wide Area ◽

Time Varying ◽

Oscillation Damping

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Tuning and Location of PSS in Multimachine Power System with State Feedback Control for Electromechanical Oscillation Damping Control

European Journal of Electrical Engineering ◽

10.18280/ejee.210603 ◽

2019 ◽

Vol 21 (6) ◽

pp. 499-507

Author(s):

Jose Oscullo ◽

Carlos Gallardo

Keyword(s):

Feedback Control ◽

Power System ◽

State Feedback ◽

State Feedback Control ◽

Damping Control ◽

Electromechanical Oscillation ◽

Oscillation Damping

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Designing a GA-Based Robust Controller For Load Frequency Control (LFC)

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.1592 ◽

2018 ◽

Vol 8 (2) ◽

pp. 2633-2639 ◽

Cited By ~ 1

Author(s):

K. Soleimani ◽

J. Mazloum

Keyword(s):

Power Systems ◽

Power System ◽

Power Plants ◽

Frequency Control ◽

Load Frequency Control ◽

System Stability ◽

Robust Controller ◽

Power Flux ◽

Pi Controllers ◽

Multiple Units

Power systems include multiple units linked together to produce constantly moving electric power flux. Stability is very important in power systems, so controller systems should be implemented in power plants to ensure power system stability either in normal conditions or after the events of unwanted inputs and disorder. Frequency and active power control are more important regarding stability. Our effort focused on designing and implementing robust PID and PI controllers based on genetic algorithm by changing the reference of generating units for faster damping of frequency oscillations. Implementation results are examined on two-area power system in the ideally state and in the case of parameter deviation. According to the results, the proposed controllers are resistant to deviation of power system parameters and governor uncertainties.

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