Optimization of protection coordination in the power system (OPCIPS) of Central Philippine University

Abstract

Central Philippine University (CPU) is a well-established school that has expanded over the years, resulting in increased demand for a reliable and efficient power system. However, its current protection coordination scheme is outdated and not adequate for the latest energy needs. The goal of the study is to build up an optimized protection coordination system for CPU power supply to improve its reliability. To initiate the study, the team conducted an extensive assessment of the current electrical system, reviewing historical fault records and component-level contributions to system failure. On the other hand, CPU still uses old electrical drawings which resulted in errors in coordination of fuse protection. The researchers then used the ETAP simulation software to examine the fault performance of the system. The findings were vast majority of coordination problems were located at Feeder 2 (65A, pole P03), RMA (100A, pole P15FDR2), JHS (40A, pole P26FDR2-T9), and near Mary Thomas building (50A, pole P32FDR2). In addition, a few locations were noted as having high fault potential, such as areas close to the Senior High parking area, LHB and Mary Thomas, Theology, Elementary, Engineering, LDT, and CHM buildings. Based on the analysis of the results from the fault identification survey and ETAP tests, the researchers proposed modifications were; change the fuse size of FDR2 UGym Iso 65A from 65A to 100A, FDR2 RMA Iso 100A from 100A to 80A, FDR2 Iso 40A located at pole P26FDR2-T9 from 40A to 50A, FDR2 MT Iso 50A located at pole P32FDR2 from 50A to 40A, installation of isolation fuse at pole P5FDR1 T-2 with rating of 30A, and installation of isolation fuse at pole P18FDR2 with rating of 65A. These modifications were already tested in ETAP to make sure the desired outcome are met.