Power System Stability Improvement via STATCOM and Supercapacitor

Power System Stability Improvement via STATCOM and Supercapacitor. Masters thesis, King Fahd University of Petroleum and Minerals.

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Arabic Abstract

المعوض المتزامن الساكن STATCOM هو أحد أنظمة النقل المرن للتيار المتردد FACTS المعتمدة على ألكترونيات القوى الكهربائية، الذي يتم توصيله بنظام القوى الكهربائية لتبادل القدرة الغير فعالة. الهدف من هذه الرسالة هو تصميم وتحليل نظام متكون من معوض متزامن ساكن ومكثف فائق لتحسين استقرار نظام القوى الكهربائية بزيادة تثبيط التأرجحات المنخفضة التردد. النظام المقترح يأخذ بالاعتبار التصميم المنسق لموازن نظام القوى الكهربائية PSS ومنظمات الجهد لمعوض المتزامن الساكن و موازنات المعوض المتزامن الساكن. تصميم نظام التحكم تم صياغته إلى مسألة حل أمثل، وتم استخدام تقنية تحسين سرب الجسيمات للبحث عن القيم المثلى لمعاملات نظام التحكم. وتم تنفيذ محاكاة نطاق وقتي غير خطية لإظهار فعالية النظام في تثبيط التأرجحات المنخفضة التردد. النتائج بينت أن أداء نظام المعوض المتزامن الساكن مع المكثف الفائق المقترح في تحسين الاستقرار الديناميكي لنظام القوى الكهربائية متفوق بالنسبة لنظام موازن نظام القوى الكهربائية أو موازن نظام القوى الكهربائية مع المعوض المتزامن الساكن فقط.

English Abstract

Power system low frequency oscillations became significant in the 1960s during the interconnection of large power systems with weak transmission lines. The most commonly used method for damping those oscillations is the power system stabilizer, but it has its disadvantages such as causing high voltage variations during disturbances. The development of FACTS, or Flexible Alternating Current Transmission Systems, have made them good candidates for enhancing power system dynamic stability. STATCOM, or static synchronous compensator, is a one of FACTS devices, that is connected in shunt to the power system. STATCOMs by their own can exchange reactive power with the power system, but they have limited ability to exchange real power because they don’t include energy storage devices. This limits their ability to improve the power system dynamic stability. In this thesis, supercapacitor energy storage systems "SCESS" is proposed as energy storage for STATCOM. The objective of this thesis is to design and analyze a system consisting of a STATCOM and a supercapacitor to improve power system dynamic stability. The proposed system takes into consideration the coordinated design of generator excitation Power system Stabilizer, STATCOM voltage regulators, and STATCOM damping stabilizers. The design of the control system is formulated as an optimization problem, and Particle Swarm Optimization technique has been utilized to search for the optimum control system parameters. Nonlinear time domain simulations have been carried out to demonstrate the effectiveness of the proposed control strategy in damping low frequency oscillations. The results have shown that the performance of the proposed STATCOM with Supercapacitor in improving power system dynamic stability is superior to that of excitation PSS, or excitation PSS and STATCOM only.

Item Type: Thesis (Masters)
Subjects: Systems
Department: College of Engineering and Physics > Electrical Engineering
Committee Advisor: Abido, Mohammed
Committee Members: Kassas, Mahmoud and El-Amin, Ibrahim
Depositing User: AL-RAMADHA ADNAN (g200361410)
Date Deposited: 11 May 2015 11:50
Last Modified: 01 Nov 2019 15:45
URI: http://eprints.kfupm.edu.sa/id/eprint/139540