Influence Of Superconducting Fault Current Limiter On Power System Transient Stability

At present,the scale and capacity of China's power system are continuously increasing,and the rising short-circuit fault current in the system will pose a serious threat to the safe operation of electrical equipment and the stability of the system.Superconducting fault current limiter(SFCL)is currently the most ideal current limiting device.It has a fast response speed,can be automatically triggered,automatically reset,and can act multiple times.It integrates detection,conversion and current limiting into one,only presents high impedance in the case of system failure,and the impedance is very small and almost zero when the system is running normally.However,during the current limiting process,SFCL inputting impedance into the system will change the structural parameters of the network and affect the stability of the power system.In addition,because the short-circuit current over-standard nodes in the system are randomly distributed in the network,and the current cost of the SFCL is expensive,it is necessary to consider the economic issues when configuring SFCL in the power system.This paper studies the influence of superconducting current limiter on the transient stability of the system through theoretical analysis and the use of PSD-BPA power system analysis and simulation software.Firstly,the influence of different types of SFCL on the system transient stability is qualitatively analyzed in the single-machine infinite system,and then the single-machine infinite system model is built based on the PSD-BPA platform,and the SFCL is simulated to verify the system transient stability in symmetric and asymmetric failure The effect of SFCL on the transient stability of the system under different circumstances is obtained.Then based on the Glowworm Swarm Optimization(GSO)algorithm and the Beetle Antennae Search(BAS)algorithm,a GSO-BAS hybrid algorithm is proposed to solve the SFCL optimization configuration problem in the system.Finally,the optimal configuration scheme provided by the GSO-BAS hybridalgorithm is simulated in a multi-machine system,and the influence of SFCL on the transient stability of the multi-machine system is judged.All the above work has demonstrated the influence of superconducting fault current limiters on the transient stability of power systems from both theoretical and simulation studies.The simulation results show that the optimized configuration scheme based on the GSO-BAS hybrid algorithm is applied to multi-machine systems.Will have a positive impact on the transient stability of multi-machine systems.