Simulation of implementing the function of SSSC converted from grid paralleling device based on power transmission

Abstract

Abstract Grid paralleling device based on power transmission can be converted into a static synchronous series compensator after grid connecting successfully. At present, the power grid becomes more and more complicated, and short-circuit faults occur frequently. In order to regulate the system power flow and limit the short-circuit current of the system, it is worthwhile to develop the function taking advantage of the characteristics of the existing equipment. In this paper, the control strategy of adjusting power is obtained by establishing SSSC model. Meanwhile, according to the nature of SSSC which can be equivalent to series impedance, the current limiting function of SSSC in the event of short circuit fault is further analyzed. Finally, building the equivalent model of SSSC in PSCAD / EMTDC, the simulation results show that changing the equivalent impedance of SSSC can regulate the flow of line transmission effectively, and prove that SSSC has a certain current limiting function in case of short-circuit.