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Dynamic braking resistor (BR), bridge type fault current limiter (BFCL), thyristor controlled series capacitor (TCSC), static var compensator (SVC) and unified power flow controller (UPFC) are well-known transient stability enhancement methods for electric power systems. Although individual technologies are well documented, so far no comparison among these methods is reported. That work fills in the gap, and presented a detailed analysis and comparison among these five methods. The comparison was done in terms of transient stability enhancement, control structure and cost. The total kinetic energy (TKE) of the generators in the system was used to determine the transient stability enhancement index. The Critical Clearing Time (CCT) was also presented as a stability limit. Simulations were performed considering both permanent and temporary faults at different points of the IEEE 30 bus power system. Simulation analyses revealed that the series connected devices perform better than the parallel connected devices. The BR has simplest control structure and its application cost is also less than the other considered auxiliary devices. Thus, this study provides a guideline to select an appropriate transient stability enhancement technique for electric power systems.
That work will be presented in 47th North American Power Symposium to be held in Charlotte, North Carolina, USA.
Figure: IEEE 30 bus system with the auxiliary devices.
Figure: Total kinetic energy for 3LG permanent fault at A of IEEE 30 bus power system.
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