Balancing asymmetrical load using a static var compensator
Paper i proceeding, 2015

Power electronic controllers are employed in the transmission and distribution levels of the power systems. In transmission level applications, Flexible AC Transmission System (FACTS) controllers, consist of shunt and series static compensators, are applied for power flow control, stability enhancement, voltage regulation and power oscillation damping. A Static Var Compensator (SVC) is a shunt-connected FACTS controller that is able to exchange reactive power with the power system in a controlled way. The SVC can be used for load balancing applications to reduce negative sequence components in the network to an acceptable level. The aim of the paper is to evaluate the dynamic performance of the SVC negative sequence controller. The benefits of the SVC negative sequence controller and characteristics is presented. The simulation illustrates that the SVC allows utilities to balance asymmetrical loads to mitigate the network negative sequence components.

imbalance and asymmetrical loads

voltage unbalance

negative sequence components

Static var compensator (SVC)


A. Alsulami

ABB Sverige

Massimo Bongiorno

Chalmers, Energi och miljö, Elkraftteknik

K. Srivastava

ABB Corporate Research Center

M. Reza

ABB Sverige

IEEE PES Innovative Smart Grid Technologies Conference Europe

Vol. 2015-January January




Elektroteknik och elektronik



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