Hybrid system application to reactive power compensation drstribution systems

مقدم أطروحة جامعية

al-Lamey, Baquer Turki Aliyah

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم الهندسة الكهربائية

دولة الجامعة

العراق

الدرجة العلمية

دكتوراه

تاريخ الدرجة العلمية

2008

الملخص الإنجليزي

Reactive power compensation in a distribution systems using capacitor placement, has attracted attention aver the last decades, and a great deal of research has been done to find the optimal size, and location of the capacitors required to minimize the power and energy losses as well as suitable time to switch these capacitors on and off, while minimizing the cost of compensation. This thesis presents an approach to treat Reactive Power Compensation in Distribution Power Systems using a hybrid system which includes fuzzy system approach and analytic method to specified locations and optimal sizes of capacitor banks to compensate the reactive power in some candidate buses as well as the using of Artificial Neural Network (ANN) in controlling the power switches operation at connecting the switched capacitor banks installed in the specified buses.

The inputs of fuzzy controller are phase angle and voltage magnitude of all load buses and the outputs of that controller is suitability index, the highest index value represents the highest suilability of bus to place the capacitor bank on, while the inputs of ANN are active power, reactive power and voltage magnitude of candidate buses and their output is the corresponding logic value of power switches control voltage which is used to select the switched capacitor value at those buses.

Using phase angle instead of power losses as in some other studies leads to make cur approach more economic from calculation point of view than the other widely used techniques and phase angle value implementation characterize cur technique.

The objective function which is used in this thesis to find the optimal capacitor sizes including three terms namely the cost of peak power losses; energy losses and Installation of capacitor banks, the aim is to maximize this objective function while satisfying the system's constrains. The proposed method is implemented in Matlab-7.5 environment and tested on 38-bus, 39 lines distribution system from Nasseriya distribution network in southern part of Iraq at three levels of load namely Peak, Medium, and Light load levels under the following case studies :- * Normal test system (without reconfiguration) * Reconfiguration test system by replacing line (16-17) by line (15-17). * Reconfiguration test system by replacing line (16-17) by line (14-17).

Reconfiguration test system by replacing line (16-17) by line (18-17). Simulation results obtained show that the proposed method is an effective and flexible approach and capable of producing high quality solutions for reactive power compensation in distribution power systems. An educational program has been prepared depending on instructional design concepts and using tutorial method to present concepts and information of the optimum design of reactive power compensation in distribute systems.

This program helps to combine the theoretical side with the practical one to get the optimal learning.

التخصصات الرئيسية

الهندسة الكهربائية

الموضوعات

• الكهرباء
• أنظمة الطاقة الكهربائية

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-305446