Phase balancing optimization using mixed-integer linear programming (MILP) of feeder sef1 of BOHECO II in Ubay, Bohol Philippines

Date

6-2015

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

Restrictions

Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

In order for BOHECO II to integrate a solar power plant to its system to augment its energy supply, the unbalanced flows existing in feeder SEF1 where the plant is planned to be connected must be reduced first. This study proposed a solution to the phase balancing problem by swapping the phases of laterals connected to the primary trunk of the feeder. A weighted, multi-objective optimization model of the feeder was formulated using mixed-integer linear programming. The first section received the highest weight, 0.225306502 the next six sections recieved a weight of 0.055700722 and the rest of the feeder received the lowest weight, 0.019151703. Solving the optimization model yielded a phase swapping scheme. Generally, the new phase settings of the lateral resulted in the reduction of unbalanced flows in the feeder. Sections near the source experienced a reduction of around 60% while those in the rear of the feeder experienced a higher reduction, around 70% in average. However, there are sections which experienced an increase in unbalanced flows instead. This is the consequence of the weights in the formulation of the model because weights signify a trade-off among objectives. Among the sections that experienced an increase in unbalanced flows, the first section of the feeder has the most important bearing because it connects the rest of the feeder to the source outage of this section means outage of the whole feeder. This study concluded that application of MILP to phase balancing is limited by the number of sections to be balanced.

Language

English

Location

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

Call Number

LG 993.5 2015 E64 /B73

Document Type

Thesis

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