on dc-segmentation of interconnected power systems

The ultimate goal of power system operation and planning is to increase power system reliability which enforces interconnected operation of power system. as a result of power system interconnection, the inter-area oscillation under different disturbances may cause power system partial or total blackout. dc-segmentation of interconnected power systems is a solution in which the topology of the network is changed by dividing it into small segments, and connecting them by dc-links. from the dynamic operation and planning aspects of the power system, the controllability of the system at the presence of multiple hvdc links used for segmented power system is a complicated problem. in this paper a procedure to study the concept of power system dc-segmentation using the dc-links as a grid shock absorber is introduced. a well-established evolutionary technique, namely imperialist competitive algorithm (ica) is used to design a hvdc supplementary controller for a non-segmented interconnected power system. the performance of the controller and the dc-segmented system is investigated after dc-segmentation. the obtained results show the potential value of using supplementary controllers in the dc-segmented power networks.