Assessment of the under voltage scenarios on the 69 KV transmission line of Luzon grid done by the National Grid Corporation of the Philippines (NGCP) system management

Date

12-2015

Degree

Bachelor of Science in Electrical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Karen-Christian C. Agno

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

The substations operating the 69 kV line of the Luzon Grid had been receiving low voltage complaints from its customers. These complaints are presented by the substation engineers to the Luzon Regional Control Center (LRCC) only after the occurrence of the issue. The voltage issues were then mitigated through adjusting the tap positions of the transformers or installing capacitor banks on the transmission lines. This chain of reactions was identified to have low management reliability since there exists unrecorded voltage violations. These scenarios are undesirable since the Philippine Grid Code (PGC) sets standards regarding voltage regulation. Thus, in order to prevent this/these issue/s, under voltage indicators were used in the study to predict which substations are susceptible to incurring low voltage problem. These indicators, validated by the literatures reviewed in the study, were transmission line loading and transformer percent loading. Each of the indicators was evaluated based on the PGC standards and the 80% loading limitation was established through the system management experience. The data evaluated from April to June 2015 since the voltage complaints were recorder on this timeframe. The assessment revealed that thirteen out of thirty one substations could possibly experience low voltage problems. It was found out that the transformer percent loading had frequent occurrences in indicating the impending under voltage problems in the 69 kV line. The frequency of the low voltage indicators, meanwhile, fairly confirms its individual weight for better operational management decisions of the system operator.

Language

English

Location

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

Call Number

LG 993 2015 E64 /R33

Document Type

Thesis

This document is currently not available here.

Share

COinS