利用新型快速断路器提升电能质量的研究

随着微电子器件与电力电子技术的飞速发展,用户对电能质量的要求越来越高。和传统的断路器相比,新型快速断路器采用了更高水平的灭弧技术,提升了机械动作性能,动作时间明显缩短,从接受跳闸命令到出口动作切除故障只需要大概 20ms的时间。通过 PSCAD仿真软件,在母线处分别对单相接地故障、两相接地故障等情况进行了仿真分析,验证了采用新型快速断路器技术,能够有效减小故障处电压跌落时间、故障恢复时间、三相电压不平衡等现象, 提升了电力系统的电能质量。

Studyon the application of newtype fast circuit breaker in improving power quality

With the fast development of microelectronic devices and power electronics technology, thecustomers have higher and higher demands for the power quality. Comparing with the traditionalcircuit breaker, the new type fast circuit breaker adopts advanced arc extinguishing technology, themechanical operation performance is improved and the action time is obviously shorten, it takes 20 msto eliminate the faults from receiving trip order to outlet action. By the PSCAD simulation software ,single-phase ground fault and two-phase ground fault on the bus were separately simulated andanalyzed. The results verify the use of new type fast circuit breaker can effectively reduce the voltagedrop time, faults recovery time, three-phase voltage unbalance at the faults and improve the power quality of the power system.