Analysis of the effect of varying voltage levels on a short-distance Single Wire Earth Return (SWER) distribution system

Date

3-2011

Degree

Bachelor of Science in Electrical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Roderick L. Catriz

Committee Member

Rodolfo A. Aguirre Jr., Billy Jonh Q. Valdez, Athena P. Lavega

Request Access

To request access of this material, please email the administrator at uscs-mainlib.uplb@up.edu.ph

Abstract

Experimentation done with the Single Wire Earth Return (SWER) distribution system was made while holding the length of the line and the depth of the grounding rods constant at 500 meters and 3 meters, respectively. Variations in supplied voltage and load resistances were considered as independent variables for the study. Voltage drop of the system was obtained and subjected to a statistical curve fitting test to determine the trend it follows with respect to the variations in the said parameters. A parabolic trend between the voltage drop and the independent variables was determined from this test. An effective value of 20.551Ω for the earth resistance was then obtained. Assuming that this value was purely resistive, theoretical system current was determined and compared with the measured current from the experiment. Calculation of percentage error between currents yielded a value of 3.21391%, which is greater than the accepted statistical level of significance used for the study which is 1%. The earth, taken as a purely resistive element, was considered as the probable cause of error in the computation for the theoretical system current. The parabolic trend observed on the voltage drop with respect to the independent variables might also be caused by this assumption. Thus, the earth as a non-resistive element in SWER systems must be taken into consideration in order to ensure its effectiveness.

Language

English

LC Subject

Electric power systems, Electric power transmission, Electric power system stability

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Document Type

Thesis

This document is currently not available here.

Share

COinS