Based on the dynamic dielectric recovery process in the vacuum gaps in series, investigations were made on post-arc insulation state in double and multi-breaks operation in high voltage power system. From the research...Based on the dynamic dielectric recovery process in the vacuum gaps in series, investigations were made on post-arc insulation state in double and multi-breaks operation in high voltage power system. From the research on the breakdown weak points in high voltage vacuum gaps, their turnout and distribution, some theoretic work were made to set up the models for describing the statistical property of multi-breaks vacuum circuit-breakers' breakdown and post-arc re-strike, which can be used for explaining the mechanism of the improvement in the breaking capacity of multi-breaks units compared with that of single-break ones which have the same equivalent gap length. The advantages of vacuum breakers with multi-breaks are proposed.展开更多
快速隔离开关是混合式直流断路器的关键部件之一,其分合闸时间在数毫秒以内的,常规断路器难以提供如此快速的操作速度。文中在借鉴已有真空开关研制经验的基础上,从分析直流快速隔离开关的需求入手,重点对真空小间隙应用在直流隔离、无...快速隔离开关是混合式直流断路器的关键部件之一,其分合闸时间在数毫秒以内的,常规断路器难以提供如此快速的操作速度。文中在借鉴已有真空开关研制经验的基础上,从分析直流快速隔离开关的需求入手,重点对真空小间隙应用在直流隔离、无弧分断场合的情况进行有针对性的系列试验,同时借助试验和理论分析,解决了多断口均压问题,使中压真空开关得以扩展到高压直流隔离开关应用领域。研制出一台分闸速度小于3 ms的200 k V直流快速隔离开关,且该方案具有易于向高压扩充的优势,能满足混合式直流断路器的应用需求。展开更多
文摘Based on the dynamic dielectric recovery process in the vacuum gaps in series, investigations were made on post-arc insulation state in double and multi-breaks operation in high voltage power system. From the research on the breakdown weak points in high voltage vacuum gaps, their turnout and distribution, some theoretic work were made to set up the models for describing the statistical property of multi-breaks vacuum circuit-breakers' breakdown and post-arc re-strike, which can be used for explaining the mechanism of the improvement in the breaking capacity of multi-breaks units compared with that of single-break ones which have the same equivalent gap length. The advantages of vacuum breakers with multi-breaks are proposed.
文摘快速隔离开关是混合式直流断路器的关键部件之一,其分合闸时间在数毫秒以内的,常规断路器难以提供如此快速的操作速度。文中在借鉴已有真空开关研制经验的基础上,从分析直流快速隔离开关的需求入手,重点对真空小间隙应用在直流隔离、无弧分断场合的情况进行有针对性的系列试验,同时借助试验和理论分析,解决了多断口均压问题,使中压真空开关得以扩展到高压直流隔离开关应用领域。研制出一台分闸速度小于3 ms的200 k V直流快速隔离开关,且该方案具有易于向高压扩充的优势,能满足混合式直流断路器的应用需求。
