Fuzzy logic method based reactive power and voltage coordination in distribution systems

Dissertant

Muhammad, Aws Habib

University

University of Technology

Faculty

-

Department

Electronic Engineering Department

University Country

Iraq

Degree

Master

Degree Date

2008

English Abstract

The thesis shows a method to find the LTC (Load Tap Changer) position and capacitor ON/OFF status of each hour for the next day in main or secondary distribution substations to improve the voltage profile on the secondary bus and restrain reactive power flow into the transformer at the same time, The only condition to achieve these goals is the previous knowledge (by forecasting) of load demand for active and reactive power and the primary bus voltage for each hour of that day. The practical constraints (like bus voltage limits, maximum allowable number of switching operations in a day for the LTC and capacitor, and the tolerable worst power factor) are involved through the use of membership concept in fuzzy set theory. This method is also considering the variation of load active & reactive power with its voltage, where the loads are classified into three categories according to their relationship with voltage, and so there are constant impedance loads, constant current loads and constant power loads. To demonstrate the usefulness of this method, reactive power and voltage control at a distribution substation in the service area of Taipei City District Office of Taiwan Power Company is investigated, in addition of an example on one of the Iraqi national grid substations (Yarmook substation) made by assumption (due to the information absence of the load coefficients in Iraq).

Main Subjects

Electronic engineering

Topics

• Electricity
• Electric power systems

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-305417