Evaluation of transformer tap changing as system voltage regulating procedure (SVRP) applied in San Esteban to Laoag 115 KV line during wet season done by the NGCP

Date

6-2016

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

Rodolfo A. Aguirre, Jr.,

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

Transformer tap changing is applied by the NGCP as SVRP in order to address the over voltage problem in the existing San Esteban to Laoag 115 kV line. This is due to the significant decrease in power consumption, which causes recurring voltage fluctuations as reported from June 15 to 28, 2015. A part of the procedures adopted from the company, the setting for San Esteban transformer units TO1 and TO2 are varied and optimized. This is done by conducting a Newton-Raphson load flow solution using Power World Simulator. After gathering the results of the test runs, optimization by brute force is employed to determine the setting which minimized the total power loss and improved the system voltage the most. Quantifying parameters such as Power Loss Reduction and system Voltage Profile Improvement Indices (VPII) are computed to evaluate the effectiveness of the procesure. After 169 test runs, the optimal setting for SESS TO1 is determined to be from Tap 4 to Tap 1, and from Tap 8L to Tap 12L for SESS TO2. As per stimulation results, these tap settings reduced the system power loss by 3.42% to 3.75% as compared to the results using the nominal positions of Tap 13 and Tap N for SESS TO1 and TO2 respectively. Also, the system VPII improved by 30.59% to 32.74% after the application of the optimal tap setting. These results are consistent with tap setting adjustments needed as determined before the simulation process.

Language

English

Location

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

Call Number

LG 993 2016 E64 S83

Document Type

Thesis

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