摘 要
本文深入研究了新型多端口机械式直流断路器的关键技术，旨在解决当前直流电网中快速、可靠、经济地切断故障电流的技术难题。本文阐述了新型断路器的设计基础与理论依据，并详细描述了其独特的拓扑结构，该结构集成了多端口控制单元，实现了对多个直流源或负载的灵活控制。文章分析了传统换流技术的局限性，并对比探讨了新型换流技术在提高断路器性能方面的优势与选择。然而，研究也揭示了新型多端口机械式直流断路器在技术实现、高性能换流技术需求、直流系统无自然过零点处理及可靠性与经济性平衡等方面面临的挑战。针对这些挑战，本文提出了优化建议，包括拓扑结构与控制策略的优化、新型换流技术的研发与应用、引入新型材料与器件以及综合考虑可靠性与经济性等。最后，本文总结了新型多端口机械式直流断路器关键技术研究的重要性和应用前景，为直流电网的安全稳定运行提供了有力支持。
关键词：新型多端口机械式直流断路器；拓扑结构；换流技术
RESEARCH ON KEY TECHNOLOGY OF NEW MULTI-PORT MECHANICAL DC CIRCUIT BREAKER
ABSTRACT
In this paper, the key technology of the new multi-port mechanical DC circuit breaker is studied in depth, aiming at solving the technical problem of cutting off the fault current quickly, reliably and economically in the current DC power network. This paper describes the design basis and theoretical basis of the new circuit breaker, and describes its unique topology in detail. The structure integrates multi-port control unit to realize flexible control of multiple DC sources or loads. This paper analyzes the limitations of traditional converter technology, and compares and discusses the advantages and choices of new converter technology in improving circuit breaker performance. However, the research also reveals the challenges faced by the new multi-port mechanical DC circuit breaker in technical realization, high performance commutation technology, DC system without natural zero crossing processing and reliability and economic balance. In response to these challenges, this paper puts forward optimization suggestions, including the optimization of topology and control strategy, the development and application of new converter technology, the introduction of new materials and devices, and the comprehensive consideration of reliability and economy. Finally, this paper summarizes the importance and application prospect of the key technology research of the new multi-port mechanical DC circuit breaker, which provides strong support for the safe and stable operation of the DC power grid.
KEY WORDS：New multi-port mechanical DC circuit breaker; Topological structure; Commutation technique
目 录
摘 要 I
ABSTRACT II
第1章 绪论 1
1.1 研究背景及意义 1
1.2 国内外研究现状 1
第2章 新型多端口机械式直流断路器的设计原理 2
2.1 设计基础与理论依据 2
2.2 新型断路器的拓扑结构 2
2.3 关键技术分析 2
第3章 新型多端口机械式直流断路器的设计 4
3.1 拓扑结构设计 4
3.2 换流技术的选择 4
3.3 断路器关键参数的确定 4
3.4 绝缘与散热设计 5
第4章 新型多端口机械式直流断路器关键技术面临的挑战 6
4.1 文化融合缓慢 6
4.2 高性能换流技术的需求 6
4.3 直流系统无自然过零点的挑战 6
4.4 可靠性与经济性的平衡 6
第5章 新型多端口机械式直流断路器关键技术的优化建议 8
5.1 拓扑结构与控制策略的优化 8
5.2 新型换流技术的研发与应用 8
5.3 引入新型材料与器件 8
5.4 综合考虑可靠性与经济性 9
第6章 结论 10
参考文献 11
致 谢 12
