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Voltage Stability Enhancement And Loss Reduction Via Optimum Location Of A Series Capacitor
تحسين استقرارية الفولتية وتقليل الخسائر عبر تحديد مكان امثل لوضع متسعة على التوالي

Author: Firas Mohammed Tuaimah
Journal: Journal of Engineering مجلة الهندسة ISSN: 17264073 25203339 Year: 2010 Volume: 16 Issue: 3 Pages: 5736-5752
Publisher: Baghdad University جامعة بغداد

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Abstract

Series compensation is frequently found on long transmission lines used to improve voltage stability. Due to the long transmission lines, voltage begins to decay as the line moves further from the source. Series compensation devices placed strategically on the line to increase the voltage profile of the line to levels near 1.0 p.u.. This paper presents a novel optimum location and optimum percentage compensation value of a series capacitor as a compensation method to enhance the voltage stability and loss reduction. The proposed method is applied to a 11-bus power system.The load flow analysis using Newton-Raphson approach for the 11-bus test system was designed and tested using MATLAB 7 programming language.

غالبا ما يتم استخدام التعزيز المربوط على التوالي عبر استخدام المتسعة في خطوط النقل وذلك لتحسين الفولتية. بسب المسافات الطويلة لخطوط النقل, فأن الفولتية تبدأ بالأنخفاض كلما ابتعدنا عن المصدر. ولأجل هذا يتم استخدام متسعات موزعة وفق حسابات لتحافض على الفولتية بمستوى 1 للوحدة الثابتة (p.u.). تم في هذا البحث استخدام الية مثلى لوضع او استخدام المتسعة لتحسين الفولتية ولتقليل الخسائر. حيث تم تطبيق الطريقة على منظومة أفتراضية عالمية ذات 11 عقدة (IEEE-11BUS).تم استخدام طريقة الجريان نيوتن- رافسون على هذه المنظومة وأستخدمت اللغة البرمجية .MATLAB 7


Article
Optimal Conductor Selection in Radial Distribution Systems for Productivity Improvement Using Genetic Algorithm

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Abstract

Development of distribution systems result in higher system losses and poor voltage regulation. Consequently, an efficient and effective distribution system has become more urgent and important. Hence proper selection of conductors in the distribution system is important as it determines the current density and the resistance of the line. This paper examines the use of different evolutionary algorithms, genetic algorithm (GA), to optimal branch conductor selection in planning radial distribution systems with the objective to minimize the overall cost of annual energy losses and depreciation on the cost of conductors and reliability in order to improve productivity.Furthermore, The Backward-Forward sweep iterative method was adopted to solve the radial load flow analysis. Simulations are carried out on 69-bus radial distribution network using GA approach in order to show the accuracy as well as the efficiency of the proposed solution technique.


Article
Combination of Optimal Conductor Selection and Capacitor Placement in Radial Distribution Systems Using PSO Method
الجمع بين موصل الأمثل اختيار وتنسيب المكثفات في أنظمة توزيع شعاعي عن طريق الطريقة PSO

Author: Mahdi Mozaffari Legha
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2014 Volume: 10 Issue: 1 Pages: 33-41
Publisher: Basrah University جامعة البصرة

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Abstract

In This paper presents an approach for optimal placement and sizing of fixed capacitor banks and also optimal conductor selection in radial distribution networks for the purpose of economic minimization of loss and enhancement of voltage. The objective function includes the cost of power losses, voltage profile, fixed capacitor banks and also type of conductor selection. Constraints include voltage limit, maximum permissible carrying current of conductors, size of available capacitors and type of conductors. The optimization problem is solved by the Imperialism Competitive algorithm method and the size and site capacitor banks and type of conductors is determined. To demonstrate the validity of the proposed algorithm, computer simulations are carried out on actual power network of Kerman city, Iran and the simulation results are presented and discussed.

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