作为直流电网故障隔离清除的重要技术手段，直流断路器具有广阔应用前景。近年来，高压混合式直流断路器的研发快速推进，其发展趋势呈现高运行电压、大分断电流、低制造成本、高可靠性等显著特点。前期研究表明，杂散参数优化控制对混合式直流断路器整机可靠性、经济性提升至关重要，而且随着电压等级和关断电流提升，其影响愈发突出。本项目围绕断路器高集成度环境下IGBT组件单元及其规模化成组系统的杂散参数瞬态电磁作用机制的科学问题，以电磁场理论为根本，通过与半导体物理学科交叉，采用理论分析与实验测量相结合的研究方法，从3个方面开展研究（单个IGBT组件大电流关断失效的杂散电感作用规律、高集成度环境下IGBT组件串联成组的杂散电感作用机制及规律、瞬变强电磁场作用下断路器供能系统的电磁耦合作用机制），深度认知杂散参数作用机制及规律，实现杂散参数精准控制，为我国混合式高压直流断路器研制向精细化集约型设计转型奠定基础。

As a necessary technical means for DC grid fault isolation and elimination, DC circuit breakers have broad application prospects. In recent years, the development of hybrid HVDC circuit breakers has been rapidly advancing, and its development trend has shown remarkable characteristics such as high operating voltage, large interruption current, low manufacturing cost, and high reliability. Previous investigations have shown that the optimization of parasitic parameters is critical to the security and economic improvement of hybrid DC circuit breakers, as voltage levels and turn-off currents increase, their effects become more pronounced. The project focuses on the scientific problems of the transient electromagnetic mechanism of the parasitic parameters of the IGBT module and its large-scale group system in the high integration environment of the circuit breaker. This project is taking the electromagnetic field theory as the foundation, crossing electromagnetism with semiconductor physics by employing a combination of theoretical analysis and experimental measurement. These three aspects include mechanism of parasitic inductance on large current turn-off failure of IGBT submodules, the law of stray inductance of IGBT modules connected in series in a highly integrated environment, electromagnetic coupling mechanism of energy supply system under a transient electromagnetic field. Deeply understanding the principle and of the effects of parasitic parameters and realizing precise control of parasitic parameters lay the scientific foundation for the development of hybrid HVDC circuit breakers in China from engineering to elaborate and intensive design.