Implementation of phasor measurement technology at Eskom

June 17th, 2014, Published in Articles: Energize

 

The modern era of power delivery is faced with many challenges due to decreased reserves, increased use of renewable generation, flexible alternating current transmission system (FACTS) devices, and changes in customer/load behaviour. In order to manage the risks introduced by these challenges, it is important to have near real time visibility of the health of the power system.

Phasor measurement unit (PMU) technology has come to the forefront in terms of smart measurement of the power system in general because it provides accurate, high resolution monitoring of important analysis metrics.

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Eskom initiated a project for the installation of PMU modules and substation-class phasor data concentrator (PDC) equipment at 15 key substations. This included the installation of the PDC, the synchronised measurements historian, an interface to the energy management system (EMS), and visualisation and stability applications at the national control centre (NCC). The project covered the short term requirements but has been engineered to meet future requirements as well. It has completed the factory acceptance test for the control centre’s wide area measurement system (WAMS) application and substation equipment. The installation of the PMU modules is currently in progress. The integrated site acceptance test will commence after Eskom has completed PMU installations at eight substations. The future WAMS scope includes an increase in coverage of critical nodes in the network to install a total of 52 substations.

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