Abstract
Increasing number of interconnections at a power system network raises the short circuit current levels and may cause to replace part of protecting equipment. The interphase power controller (IPC) is capable to control the power flow and to limit the short circuit current. This paper presents a control method for the IPC with common DC bus which is an alternative to phase-shifting transformers. The model of a common DC bus IPC is developed in d-q frame and based on it a control system is proposed to regulate the active power flow. The utilized structure has more flexibility in controlling the power system compared to previously proposed IPCs which are based on static synchronous series compensator. An experimental setup based on cascaded H-bridge converters has also been implemented to verify the proposed control method. Both the simulation and experimental results confirm the ability of common DC bus IPC with the proposed control method in power flow control and short circuit current limitation.
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