桥式固态限流器在舰船电网中的应用研究

Application Research of Bridge Type Solid State Current Limiter on Naval Vessel Power System

随着舰船配电网络容量的不断增大,短路电流限制技术已成为故障保护的一个研究热点。结合电力电子技术的应用,分析了一种新颖的桥式固态限流器拓扑。介绍了桥式限流器的基本工作原理,阐明了它对电力系统的正常运行无明显影响,而在短路故障发生时可以几乎无时延地自动插入一个阻抗以限制短路电流值,并能迅速切除故障回路,而且在断开短路电流时不会引起附加的振荡和过电压。仿真和实验结果证明了该理论分析的正确性。

As the expanding of naval vessel power system capacity, the technologies of short circuit current limiting in power systems have been concerned greatly. The novel bridge type solid state current limiter with power electronic technology was introduced. It is shown that in normal operation condition the limiter has no obvious effect at loads. However it will insert an impedence automatically without delay to limit the short circuit current and cut the fault circuit rapidly when fault happens. There is no oscillation as well as over voltage excited by the limiter when the fault current is switched off. With the control strategy proposed, the simulation and experimental results accord well with the theoretical analysis.