Mardlijah, Adi Soeprijanto

Desain Kontroler Tunggal Untuk Meredam Osilasi Multi Frekuensi Pada Sistem Skala Besar

Introduction

Desain kontroler tunggal untuk meredam osilasi multi frekuensi pada sistem skala besar. Desain kontroler tunggal meredam osilasi multi frekuensi pada sistem skala besar. Metoda robust control diaplikasikan, diuji pada simulasi sistem ketenagalistrikan riil.

Abstract

Paper ini menjelaskan tahapan desain kontroler tunggal yang ditujukan untuk meredam lebih dari satu frekuensi osilasi yang terjadi pada suatu sistem skala besar termasuk metoda- metoda yang dikembangkan pada setiap tahapannya. Metoda ini dikembangkan terutama sangat berguna untuk desain kontroler pada sistem yang sangat besar serta memiliki multi frekuensi osilasi dan multi variabel state sebagai kandidat sinyal umpan balik. Pada tahap awal, dilakukan pemetaan frekuensi osilasi yang muncul untuk kemudian dipilih bebe- rapa frekuensi sebagai target yang akan distabilkan. Selanjutnya, pengaruh masing-masing variabel state terhadap frekuensi target dianalisis dengan menggunakan faktor partisipasi. Variabel-variabel state yang dominan akan dipilih sebagai kandidat sinyal umpan balik. Jalur umpan balik didapat dengan menginjeksikan sinyal kontrol ke variabel state tertentu. Se- lanjutnya keefektifan jalur umpan balik dianalisis dengan konsep residu. Jalur umpan balik dengan nilai residu terbesar merupakan pilihan terbaik untuk meredam frekuensi target. Perhitungan kontroler dikembangkan berdasar kontrol robust dan akan diaplikasikan pada sistem riil ketenagalistrikan dalam level simulasi dengan Simulink-Matlab.

Review

This paper presents a systematic methodology for designing a single controller aimed at damping multiple oscillation frequencies prevalent in large-scale systems. The core contribution lies in its structured approach, developed to handle the complexities of very large systems characterized by numerous oscillation modes and a vast array of potential state variables for feedback. Such a consolidated control strategy, if proven effective, offers significant potential for simplifying the stabilization of critical infrastructure, particularly within the domain of electrical power systems, by providing a unified solution to a multi-faceted problem. The proposed design process is clearly articulated, beginning with the crucial step of mapping and selecting target oscillation frequencies. This is followed by a judicious selection of dominant state variables for feedback, utilizing participation factor analysis – a well-established technique for identifying influential variables in complex systems. The method then incorporates the concept of residues to determine the most effective feedback paths, ensuring optimal control signal injection. Crucially, the controller itself is developed based on robust control principles, indicating an intention to maintain performance across varying operating conditions. The final validation of this robust single controller is planned through simulations on a realistic power system model using Simulink-Matlab. While the abstract outlines a promising approach, further elaboration in the full paper would enhance its impact. Specifically, it would be beneficial to understand the particular robust control formulation employed and how a *single* controller effectively manages multiple, potentially distinct, oscillation frequencies without undesirable interactions or performance compromises. Additionally, a clearer articulation of the novelty and specific advancements of the "methods developed at each stage" compared to existing techniques would strengthen the paper's contribution. A rigorous discussion of the computational scalability for "very large systems" and a comparative analysis against established multi-controller or adaptive damping solutions would provide valuable context and highlight the unique advantages and potential limitations of this unified control design.

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