基于模块级联技术的混合型高压直流断路器研究

Research on Hybrid DC Breaker Based on Modular Cascaded Structure

高压直流断路器被认为是构建直流电网的核心设备之一。文中结合对现有直流断路器技术路线的对比分析,提出一种基于模块级联技术的新型混合式直流断路器方案。与现有技术方案相比,该方案在开断速度、成本以及降低工程实现的技术难度方面均具有独特的优势。文中详细描述了该方案的工作原理,并在各方面性能上与目前的方案进行了对比分析,仿真验证了所提出的新型直流断路器能够满足柔性直流输电网快速切除故障电流的需求。

The high voltage DC breaker is considered as one of core devices of DC grid. This paper proposed a new hybrid DC breaker topology based on module cascaded structure and comparative, Analysis between the proposed topology and the existing topologies was given. The proposed topology has unique advantages in several aspects such as breaking speed, cost and reducing the engineering implementation difficulty. This paper described the working principle of this topology in details. The simulation verified the effectiveness of the proposed new hybrid DC breaker topology.