固态限流器对电力系统暂态稳定性的影响

Impact on Transient State Stability of Power System by Solid State Current Limiter

为了限制电网中的短路电流,目前常采用限流器装置,但相关文献多关注限流器本身的可靠性及其性能,为此,以单机无穷大系统为理论分析模型,从系统暂态稳定的角度,详细分析了限流器的投入对电力系统产生的影响,并且探讨了故障发生在不同位置及投入不同限流电抗时系统稳定性的改变趋势。分别以单机无穷大系统和新英格兰10机39节点系统为例进行仿真,验证了在合适位置投入限流器可以对电力系统的暂态稳定产生积极的作用。

For restraining short-circuit current in power grid, it is commonly using current limiter at present, but those relat- ed documents are concentrating on reliability and performance of the current limiter. Therefore, this paper takes single-ma- chine infinite bus system as theoretical analysis model to analyze impact on power system by the limiter from the angle of transient stability of the system. In addition, it discuses changing trend of stability of the system when the fault is occurring at different places or when inputting different current-limiting reactance. It takes single-machine infinite bus system and New England 10-machine and 39-node system for simulation in order to verify active role of current limiter at proper place for transient stability of the system.