Portable wide area monitoring system consisting of 20 SterPMUs was formed in Oman in July 2016. WAMS campaign is a part of a consultancy project conducted by Tractebel Engineering, Dubai branch, for Oman Electricity Transmission Company (OETC), Muscat. The goal of measurement campaign is providing synchrophasor data for capturing of OETC system dynamics, reactive power flow and for modelling of typical general loads. SterPMUs were installed in 10 strategically selected grid stations across Main Interconnection System (MIS) in Oman and a power system in Dhofar governorate which is connected to MIS through transmission system operated by Petroleum Development Oman Company (PDO). Installation crew made close to 4000 km in order to deploy WAMS spreading from Al Buraimi and Sohar on North to Sallalah on south. Installation was done in 7 working days including one weekend for travelling from Muscat to Sallalah.

The campaign

In each station a pair of SterPMUs are monitoring an incomer and one selected feeder. Authorized users from Tractebel, OETC and distribution companies where PMUs are installed have access to real time measurements and hysterical recordings. Event triggering system with mail and SMS alarming was configured as a part of the campaign. PMU measurements confirmed an assumption that significant variation of frequency of Dhofar Transmission system (DTS) are originated by events in MIS and amplified by weak coupling. Two PMUs monitoring the same MV voltage by different voltage transformers (VT) exposed potential VT flaw in two out of ten substations. Details about installation and preliminary findings are described in an installation report.

The usage of portable WAMS in OETC was documented in papers:

  • tractebel
  • oetc
  • load modelling
  • reactive power flow