SVC for resonance control in NamPower electrical power system

The extension of the Namibian transmission system results in a near 50 Hz resonance. To control the resonance a SVC was installed at Auas 400 kV substation. A new control principle for controlling the resonance was developed and tested. The paper presents the background to the resonance problem, the Auas SVC configuration, the resonance controller and finally the conclusions from extensive test results, both from simulator and site tests.