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Comparative study of popular objective functions for damping power system oscillations in multimachine system
Naz Niamul Islam1, M A Hannan1, Hussain Shareef1
1Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bnagi, Selangor, Malaysia.
Thescientificworldjournal
|July 1, 2014
Summary
This study compares objective functions for designing power oscillation damping controllers. The multiobjective D-shaped function effectively enhances system damping and reliability by stabilizing electromechanical modes.
Area of Science:
- Electrical Engineering
- Control Systems
- Power Systems
Background:
- Power system oscillations can degrade stability and reliability.
- Designing effective damping controllers is crucial for grid stability.
- Heuristic optimization techniques are widely used for controller design.
Purpose of the Study:
- To comparatively analyze the effectiveness of different objective functions for power system oscillation damping controller design.
- To evaluate the performance of a two-stage lead-lag damping controller optimized with various objective functions.
- To assess the impact of objective functions on system damping and reliability.
Main Methods:
- Optimization of a two-stage lead-lag damping controller using the differential search algorithm.
- Simulation analysis on a linearized model to assess dominant mode performance.
- Nonlinear model simulations to evaluate damping performance during power system oscillations.
- Testing conducted on a two-area four-machine power system.
Main Results:
- The multiobjective D-shaped function demonstrated superior performance compared to other tested objective functions.
- The D-shaped function effectively moved unstable and lightly damped electromechanical modes into the stable region.
- Optimized controllers using the D-shaped function significantly improved overall system damping.
Conclusions:
- The multiobjective D-shaped function is highly effective for designing robust power system oscillation damping controllers.
- Utilizing the D-shaped function enhances overall system damping and power system reliability.
- This research provides valuable insights for selecting objective functions in heuristic-based damping controller design.
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