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Load model identification using portable PMUs: a case study in the Omani transmission system

This paper presents a measurement-based load modelling approach. Our approach uses portable PMU devices that can be quickly installed at substations. These PMUs use GPRS communication to send data to a Phasor Data Concentrator (PDC). Two PMUs are installed at each monitored station. One PMU is installed at the high-voltage side of the supply transformer and one PMU at one feeder side. Voltage disturbances are continuously monitored by these devices. A measurement-campaign of at least 6 months is typically needed in order to capture the load dynamics. Each relevant voltage disturbance is “replayed” off-line using a simulation software in order to identify the most likely aggregated load model at the monitored feeder/substation. The load model identification methodology produces easy-to-understand load models. This is a great added value of our approach as the load model is aimed to be used by planning engineers in order to adequately ensure voltage stability.

Author(s):

Hisham Al Riyami    
OETC
Oman

Musabah Al Siyabi    
OETC
Oman

Dalibor Brnobic    
OETC
Oman

Olivier Antoine    
Tractebel
Belgium

Romani Fahmi    
Tractebel
United Arab Emirates

Pierre Josz    
Tractebel
United Arab Emirates

Karim Karoui    
Tractebel
Belgium

 

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