磁通耦合型限流器对电力系统暂态稳定性的影响

磁通耦合型限流器能快速动作抑制故障大电流，且在结构上易于实现，其可行性和经济性已被分析和验证。该型限流器对系统暂态稳定性的影响是个值得研究的课题。介绍了磁通耦合型限流器的结构和原理，从理论上分析了其运行阻抗对发电机功角曲线的影响，并仿真研究了含磁通耦合型限流器的单机无穷大系统的功角特性。结果表明，该型限流器可以减小系统在暂态时域内的发电机转子的加速面积，提高系统的暂态稳定性；并延长极限切除时间，为继电保护的正确动作提供更大的时间裕度。

The Effect of Flux-Coupling Fault Current Limiter on the Transient Stability of Power System

The flux-coupling fault current limiter can suppress the fault current quickly,and is easy to realize in structure.Though the feasibility and economy of the limiter has been analyzed and verified,the influence of the limiter on the system transient stability is worth researching.This paper introduces the structure and principle of flux-coupling fault current limiter,and analyzes the influence of its operation impedance on the generator’s power-angle curve,and makes simulation on the power-angle characteristics of a single unit infinite system with a flux-coupling fault current limiter.The results show that such fault current limiter can reduce the acceleration area of generator rotor when the system is in transient time domain as to improve the transient stability of the system,and extend the resection time limit so that the relay protector can do correct action in more time margin.