Abstract

In this chapter a theoretical analysis of power system transient stability with resistor type superconducting fault current limiter (SFCL) using Lyapnov energy function is presented. SFCLs as the devices for limiting fault currents have been progressing thanks to the development of superconducting technology. Power system transient stability with resistor type SFCL is already studied, but it still needs deep investigation. This chapter proposes a simple single-machine infinite-bus power system with SFCL, a generator, and transformers being mathematically modeled, to investigate the effects of SFCLs on the power system. Through theoretical analysis and digital simulation, it is found that the resistor type superconducting fault current limiters not only limit fault current but also protect synchronization of generators. The SFCL can decrease the initial transient energy Vc injected into the power system and increase the critical transient energy Vcr, which enhances the transient stability. Both theoretical analysis and simulation results demonstrate that resistor type SFCL could improve the transient stability of power system.

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