Robust Multi-Objective Control of Power System Stabilizer Using Mixed H2/H∞ and µ Analysis

Abstract

<p>In order to study the dynamic stability of the system, having a precise dynamic model including the energy generation units such as generators, excitation system and turbine is necessary. The aim of this paper is to design a power stabilizer for Mashhad power plant and assess its effects on the electromechanical fluctuations. Due to lack of certainty in the system, designing an optimized robust controller is crucial. In this paper, the establishment of balance between the nominal and robust performance is done by the weight functions. In the frequencies where the uncertainty is high, in order to achieve to the robust performance of the controller, μ analysis is more profound, otherwise, in order to achieve to nominal performance, robust stability, noise reduction and decrease of controlling signal, the impact of the controller H2/H∞ is more profound. The results of the simulation studies represent the advantages and effectiveness of the suggested method.</p>

H-infinity controller with graphical LMI region profile for liquid slosh suppression

“…Using LMI approach, the regional pole placement known as LMI region combined with design objective in H-infinity controller should guarantee a fast input tracking capability with very minimal liquid slosh. H-infinity controller has been proven to be robust and tremendously beneficial in many linear and non-linear applications such as [17][18][19][20][21][22][23], however, for liquid slosh suppression are still lacking. The objective of the design is to actuate the system to a certain cart position with minimal slosh angle.…”