Evaluation of the balancing scheme used by BATELEC II for the unbalanced loads of Cuenca substation

Date

12-2014

Degree

Bachelor of Science in Electrical Engineering

Major Course

Major in Power Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Roderick L. Catriz

Abstract

Unbalance in a system is normally present in distribution systems because of the varying loads at the end of the lines which is associated with the consumer?s consumption. This phenomenon results to further problems such as system voltage unbalance, current unbalance, and the production of neutral current in the neutral conductor that add to the existing system loss. Having a newly built substation located in Cuenca, Batangas, Batangas II Electric Cooperative, Inc. (BATELEC II) experiences this phenomenon as one of the major problems in the said substation. To solve this problem, BATELEC II has implemented a balancing scheme that is commonly used in the field of electricity distribution called the lateral transfer method. However, the said scheme lacks the ability to balance the system continuously. Analyzing the effects of the balancing scheme used by BATELEC II will help the cooperative to determine whether lateral transfer is effective or not. Furthermore, the analysis performed on the system could be used as a basis for improving the scheme, so as to effectively balance the load. Results show that all in all, the lateral transfer method implemented by BATELEC II has positive effect to the system unbalance. There is a decrease in the amount of current unbalancebased from the trend of the graph of Percent Current Unbalance and the Current Unbalance Factor (IUF). There is also a decrease in the return current as well as in the Percent Voltage Unbalance and in the Voltage Unbalance Factor (VUF). However, problem aroseto parameters like the voltage unbalance and power factor being considered for evaluation. It has been observed that even though there is the decrease in the voltage unbalance of the system, it was very minimal.For the power factor, instead of approaching unity, there is the decrease of the power factor of the system. The observed inconsistencies in this study can be explained, however, by the main practice of the scheme done by BATELEC II. The procedure done by BATELEC II which involves transferring the tap of the loads is based on the system current thus resulting to an effect that is generally observed only in the current unbalance parameters and the neutral current and not on the voltage unbalance parameters and the power factor.Other factors that probably affect the said parameters were the varying loads of the system and the different types of loads connected to the lines.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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