为将真空断路器应用于更高电压等级,多断口真空断路器的研究成为行业内的热点问题。在分析总结此前研究成果的基础上,设计了一种由3个光控真空断路器模块(FCVIM)串联组成的126 k V真空断路器。断路器按照U形方式串联光控真空断路器模块...为将真空断路器应用于更高电压等级,多断口真空断路器的研究成为行业内的热点问题。在分析总结此前研究成果的基础上,设计了一种由3个光控真空断路器模块(FCVIM)串联组成的126 k V真空断路器。断路器按照U形方式串联光控真空断路器模块,光控真空断路器模块主要由外绝缘部件、真空灭弧室、均压电容、永磁操动机构及其控制器和操动电源等部分组成,在低电位通过光纤控制技术对工作于高电位的永磁操动机构进行控制。对三断口真空断路器和单断口真空断路器模块分别施加雷电冲击电压,结果显示三断口真空断路器相对单断口真空断路器的击穿电压增益倍数为1.59;在并联不同均压电容和人为制造三断口不同步分断情况下研究三断口真空断路器暂态电压分布特性,发现低分散性操动机构和均压电容的应用可以有效提高其开断能力。三断口真空断路器在额定电压下成功开断40 k A短路电流,在不同试验方式下完成重合闸操作,并已顺利通过挂网试运行。展开更多
The distribution function and orientation tensor of fiber suspensions in wedge shaped flow field were computed . The results indicate that with time increasing, the fiber orient themselves to flow direction graduall...The distribution function and orientation tensor of fiber suspensions in wedge shaped flow field were computed . The results indicate that with time increasing, the fiber orient themselves to flow direction gradually. At the locations with same pole radii, the angle between fiber orientation and centerline, which occurs with the most probability, decreases with the pole angle increasing . At the locations with same pole angle, the angle between fiber orientation and centerline increases with the pole radii decreasing. The second order tensors get steady more quickly at the points where the velocity g radients are larger. At the locations with same pole angle, the steady values of orientation tensors are identical. At the locations with same pole radii is, streamline becomes flatter as the pole angle decreases.展开更多
文摘为将真空断路器应用于更高电压等级,多断口真空断路器的研究成为行业内的热点问题。在分析总结此前研究成果的基础上,设计了一种由3个光控真空断路器模块(FCVIM)串联组成的126 k V真空断路器。断路器按照U形方式串联光控真空断路器模块,光控真空断路器模块主要由外绝缘部件、真空灭弧室、均压电容、永磁操动机构及其控制器和操动电源等部分组成,在低电位通过光纤控制技术对工作于高电位的永磁操动机构进行控制。对三断口真空断路器和单断口真空断路器模块分别施加雷电冲击电压,结果显示三断口真空断路器相对单断口真空断路器的击穿电压增益倍数为1.59;在并联不同均压电容和人为制造三断口不同步分断情况下研究三断口真空断路器暂态电压分布特性,发现低分散性操动机构和均压电容的应用可以有效提高其开断能力。三断口真空断路器在额定电压下成功开断40 k A短路电流,在不同试验方式下完成重合闸操作,并已顺利通过挂网试运行。
基金Project supported by the National Natural Science Foundation for Outstanding Youth of China. (Grant No: 19925210)
文摘The distribution function and orientation tensor of fiber suspensions in wedge shaped flow field were computed . The results indicate that with time increasing, the fiber orient themselves to flow direction gradually. At the locations with same pole radii, the angle between fiber orientation and centerline, which occurs with the most probability, decreases with the pole angle increasing . At the locations with same pole angle, the angle between fiber orientation and centerline increases with the pole radii decreasing. The second order tensors get steady more quickly at the points where the velocity g radients are larger. At the locations with same pole angle, the steady values of orientation tensors are identical. At the locations with same pole radii is, streamline becomes flatter as the pole angle decreases.
