Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 31, No. 4 (April 2018) 564-573    Article in Press

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  APPLICATION OF AN ADDITIVE SELF-TUNING CONTROLLER FOR STATIC SYNCHRONOUS SERIES COMPENSATOR FOR DAMPING OF SUB-SYNCHRONOUS RESONANCE OSCILLATIONS
 
M. Abbasi, H. Shayestehkhah and B. Tousi
 
( Received: June 27, 2017 – Accepted in Revised Form: November 30, 2017 )
 
 

Abstract    In this paper, an additive self-tuning (ST) control scheme is presented for a static synchronous series compensator (SSSC) to improve performance of conventional PI control system for damping sub-synchronous resonance (SSR) oscillations. The active and reactve series compensation are provided by a three-level 24-pulse SSSC and fixed capacitor. The proposed ST controller consists of a pole shift (PS) controller and a recursive least squares (RLS). The RLS identifier algorithm is used to estimate parameters of auto regressive moving average exogenous (ARMAX) model. With this scheme, there is no any necessity for retuning the PI controller parameters under different operational circumstances of the system. The SSR analysis are performed using eigenvalue analysis, transient simulation and FFT analysis. The considered test system is adapted from IEEE First Benchmark Model. As shown in the results, the proposed additive ST controller has an effective and acceptable performance for damping of SSR under different disturbances and operating conditions. It should be noted here that all digital simulations have been done by using MATLAB.

 

Keywords    Static Synchronous Series Compensator; Sub-Synchronous Resonance; Self-tuning; Auto Regressive Moving Average Exogenous; Recursive Least Squares; Pole Shift

 

چکیده   

دراین مقاله, یک کنترل کننده خود تنظیم برای یک جبران ساز سنکرون سری اساتیکی (SSSC) ارایه می گردد که هدف از آن بهبود عملکرد سیستم کنترل PI مرسوم در کاهش میراسازی نوسازات تشدید زیر سنکرون (SSR) می باشد. جبران سازی سری اکتیو و راکتیو به ترتیب توسط یک SSSC سه سطحه 24 پالس و یک خازن ثابت انجام می گیرد. سیستم کنترلی پیشنهادی متشکل از یک کنترل کننده شیفت قطب (PS) و حداقل مربعات بازگشتی (RLS) می باشد. الگوریتم شناسایی RLS برای تخمین پارامترهای مدل ARMAX مورد استفاده در این مطالعه به کار رفته است. بر اساس طرح پیشنهادی, نیازی برای تنظیم مجدد پارامترهای کنترل کننده PI تحت شرایط مختلف کاری سیستم وجود نخواهد داشت. تحلیل های SSR با استفاده از آنالیز مقادیر ویژه, شبیه سازی حالت گذرا و آنالیز FFT انجام گرفته اند. همانطور که نتایج این مطالعه بر روی مدل اول محک IEEE به وضوح نشان داده اند, کنترل کننده خود تنظیم پیشنهادی در جهت میراسازی نوسانات تشدید زیر سنکرون دارای عملکرد قابل قبول و موثری تحت اختلالات و شرایط کاری مختلف سیستم می باشد. لازم به ذکر است که تمام شبیه سازی ها توسط نرم افزار MATLAB انجام شده اند.

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