Taipower Company has already completed the installation of the Outage Management System (OMS) automatic mapping and facility management system in all service districts. However, the service phases of distribution transformers (DT¡¦s) are difficult to be identified without applying the proper instruments because of under-ground systems with complicated connection of facility components. The phase information of transformers in the OMS database is often inconsistent with the actual service phase, leading to a decrease in the performance of distribution system analysis, planning, and operation of Taipower System.
The objective of this thesis is to present a new Phasor Measurement System (PMS) to identify the phases of DT¡¦s to support the update of OMS of Taipower Company. The attributes of DT¡¦s in OMS, including the locations and Utility Facility Identifications (UFID), are downloaded to a portable personal computer. The PMS will measure the voltage levels of the potential transformer in substations (S/S) and secondary side of field transformers for the calculation of phase angles with the synchronized mode. By integrating the GPRS communication module in the PMS, the time synchronization of two PMS units at the S/S and the DT can be obtained. The voltage phase angle at S/S can be retrieved by the PMS units as reference for phasor comparison to identify the phases of DT¡¦s.
The PMS developed in this study includes two units, which will be installed at S/S and field DT sites respectively. The voltage measurement and process module are used to measure voltage signals at the S/S and DT. The PMS at S/S will transmit the phase angle with time tag to the PMS at DT to identify the phases of DT¡¦s. The proposed PMS to be presented in this study will enhance the effectiveness of the PMS used by the Taipower distribution system. By integrating the interface program, the transformer phases information in OMS can be updated to support various distribution system application functions more effectively.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0708108-144833 |
| Date | 08 July 2008 |
| Creators | Tsou, Yao-yang |
| Contributors | Shih-Chieh Hsieh, Chia-Hung Lin, Chao-Shun Chen, Jaw-Shyang Wu |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0708108-144833 |
| Rights | not_available, Copyright information available at source archive |
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