research centers


Search results: Found 5

Listing 1 - 5 of 5
Sort by

Article
Robust Controller Design for Load Frequency Control in Power Systems using State-Space Approach

Authors: Ibraheem K. Ibraheem --- Rami A. Mahir --- Ismail A. Mohammed
Journal: Journal of Engineering مجلة الهندسة ISSN: 17264073 25203339 Year: 2011 Volume: 17 Issue: 2 Pages: 265-278
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

In this paper a robust governor has been designed using H∞ techniques to replace the conventional governor of the steam turbine of the power system to regulate the frequency of the power grid. The robust governor is synthesized using state-space approach with time variations, neglected dynamics, and constant main steam pressure are considered in the design process. The proposed approach ensures internal stability, satisfying both frequency and time domains requirements, and obtaining minimal performance H∞-norm of the closed-loop system in one burden. The simulations are carried out using MATLAB and the results show that the overall system output performance can be improved using the proposed H∞ robust governor

في هذا البحث تم تصميم حاكم نشيط بإستخدتم تقنيات ال (H∞) ليستبدل الحاكم التقليدي لمنظومة التوربين في منظومات الطاقة الكهربائية لتنظيم التردد الخاص بالشبكة الكربائية. المسيطر النشيط تم تصميمه بإستخدام طريقة فضاء الحالة مع الاخذ بنظر الاعتبار التغيرات الزمنية, الديناميك المهمل, ضغط ثابت للبخار المتولد من المرجل. الطريقة المقترحة تضمن الاستقرارية الداخلية و وتحقق كلاً من متطلبات مجالي الزمن و التردد وتحصل على أقل (H∞-norm ) للنظام المغلق في نفس الوقت. النتائج نفذت إستخدام برنامج MATLAB وأظهرت بأن الاداء الكلي للمنظومة يمكن أن يتحسن بإستخدام الحاكم النشيط المقترح


Article
Tuning of Load Frequency PID Controller of Electric Power System using Metaheuristic Algorithms

Authors: Pasala Gopi --- P. Linga Reddy
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2016 Volume: 12 Issue: 1 Pages: 30-42
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

This paper investigates Load Frequency Control of multi area inter connected power system havingdifferent turbines with PID controller. The gain values of controller are optimized using different MetaheuristicAlgorithms. The performance and validity of designed controllers were checked on multi area interconnected powersystem with various Step Load Perturbations. Finally, the performance of proposed controllers was compared withconventional controller and from the result it was proved that the proposed controller exhibits superior performancethan conventional controller for various Step Load Perturbations.


Article
Load Frequency Control for Two-area Multi-Source Interconnected Power System using Intelligent Controllers

Author: Arkan Ahmed Hussein
Journal: Tikrit Journal of Engineering Sciences مجلة تكريت للعلوم الهندسية ISSN: 1813162X 23127589 Year: 2018 Volume: 25 Issue: 1 Pages: 78-86
Publisher: Tikrit University جامعة تكريت

Loading...
Loading...
Abstract

This paper presents the study of intelligent controllers for Two-area multi-source interconnected power system model. The controller gains are optimized using Conventional method, GA and BAT algorithms and investigation is carried out for the best optimization method on the basis of dynamic performance and stability of the power system model. The power system model under investigation two area each area consists of thermal, hydro and Double Fed Induction Generator (DFIG) based wind unit with different participation factor in the total generation for their respective area. It has been observed that an appreciable improvement in the system dynamic performance is achieved using Bat algorithms for load frequency controller for multisource power system model as compared with conventional method and GA algorithm.


Article
Chaos Algorithm versus Traditional and Optimal Approaches for Regulating Line Frequency of Steam Power System

Authors: Ali M. Yosuf --- Ahmed A. AbdElhafez
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2018 Volume: 14 Issue: 2 Pages: 120-126
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

Load Frequency Control (LFC) is a basic control strategy for proper operation of the power system. It ensures the ability of each generator in regulating its output power in such way to maintain system frequency and tie-line power of the interconnected system at prescribed levels. This article introduces comprehensive comparative study between Chaos Optimization Algorithm (COA) and optimal control approaches, such as Linear Quadratic Regulator (LQR), and Optimal Pole Shifting (OPS) regarding the tuning of LFC controller. The comparison is extended to the control approaches that result in zero steady-state frequency error such as Proportional Integral (PI) and Proportional Integral Derivative (PID) controllers. Ziegler-Nicholas method is widely adopted for tuning such controllers. The article then compares between PI and PID controllers tuned via Ziegler-Nicholas and COA. The optimal control approaches as LQR and OPS have the characteristic of steady-state error. Moreover, they require the access for full state variables. This limits their applicability. Whereas, Ziegler-Nicholas PI and PID controllers have relatively long settling time and high overshoot. The controllers tuned via COA remedy the defects of optimal and zero steady-state controllers. The performance adequacy of the proposed controllers is assessed for different operating scenarios. Matlab and its dynamic platform, Simulink, are used for stimulating the system under concern and the investigated control techniques. The simulation results revealed that COA results in the smallest settling time and overshoot compared with traditional controllers and zero steady-state error controllers. In the overshoot, COA produces around 80% less than LQR and 98.5% less than OPS, while in the settling time, COA produces around 81% less than LQR and 95% less than OPS. Moreover, COA produces the lowest steady-state frequency error. For Ziegler-Nicholas controllers, COA produces around 53% less in the overshoot and 42% less in the settling time.


Article
AUTOMATIC GENERATION CONTROL IN MULTI AREA INTERCONNECTED POWER SYSTEM USING PID CONTROLLER BASED ON GA AND PSO
التحكم بنظام التوليد الذاتي (AGC) لمنظومة قدرة متعددة المناطق باستخدام المسيطر (تناسبي- تكاملي- تفاضلي) (PID) بالاستناد إلى الخوارزمية الجينية(GA) وأمثليه أسراب الجسيمات(PSO)

Author: Ghassan Abdullah Salman غسان عبد الله سلمان
Journal: DIYALA JOURNAL OF ENGINEERING SCIENCES مجلة ديالى للعلوم الهندسية ISSN: 19998716/26166909 Year: 2015 Volume: 8 Issue: 4 Pages: 297-310
Publisher: Diyala University جامعة ديالى

Loading...
Loading...
Abstract

The goal of paper is to maintain the frequency and tie line power changes are maintained at their scheduled values, so in this paper presents two methods for determination of the optimal (Proportional-Integral-Derivate) PID parameters for Automatic Generation Control (AGC) of the three areas (non reheat thermal-reheat thermal-hydraulic) interconnected power system, the first is the Genetic Algorithm (GA) and the second is the Particle Swarm Optimization (PSO). The GA and PSO are applied to search for the optimal PID controller parameters to minimize various performance indexes as objective functions. These objective functions namely Integral Absolute Error (IAE) and Integral Square Error (ISE) are considered for optimization. The performance of the intelligent controllers based on GA and PSO has been compared with tie line bias control strategy, the settling time, maximum deviation and peak time with the proposed controllers are better than the outputs of the tie line bias control strategy. From combination sets (GA-IAE, PSO-IAE, GA-ISE and PSO-ISE), GA-IAE and PSO-IAE have better settling time and lesser peak time when compared with GA-ISE and POS-ISE while, GA-ISE has lower maximum deviation when compared with other sets.

الهدف من النشرية هو الحفاظ على التردد والتغيرات ما بين خطوط نقل القدرة عند القيم المقررة, تم عرض طريقتين لتحديد المتغيرات الأمثل للمسيطر( تناسبي- تفاضلي- تكاملي) (PID) للتحكم بنظام التوليد الذاتي (AGC) لمنظومة قدرة ذات ثلاث مناطق (non reheat thermal-reheat thermal-hydraulic), الأول هو الخوارزمية الجينية (GA) والثاني هو أمثلية أسراب الجسيمات (PSO). تطبق الخوارزمية الجينية (GA) و أمثلية أسراب الجسيمات (PSO) في هذا البحث للسيطرة على متغيرات (PID) لتقليل مؤشرات أداء متعددة والتي أعتمدت كأهداف موضوعية. تم إعتماد تكامل مطلق الخطأ (IAE) وتكامل مربع الخطأ (ISE) كمقايس لدقة العمل والمفاضلة. المسيطرات الذكية كالخوارزمية الجينية (GA) وأمثلية أسراب الجسيمات (PSO) تـم مقـارنة أدائـها مع المسـيطر الانـحياز الاسـتراتيجـي (bias control strategy), ولاحظنا أن المسيطرات المقترحة ذات أداء أفضل من حيث زمن الاستقرار و الحد الأقصى للانحراف و زمن القمة مقارنة مع المسـيطر الانـحياز الاستراتيجـي (bias control strategy). ومع مـزيـج المجاميع (GA-IAE, PSO-IAE, GA-ISE and PSO-ISE ), GA-IAE و PSO-IAE توصلنا إلى أفضـل زمـن اسـتقـرار و زمـن قمة مقارنة مع GA-ISE و PSO-ISE بـينـما لاحظنا أن GA-ISE يمتلك أقل حد للانحراف مقارنة مع بقية المجاميع.

Listing 1 - 5 of 5
Sort by
Narrow your search

Resource type

article (5)


Language

English (5)


Year
From To Submit

2018 (2)

2016 (1)

2015 (1)

2011 (1)