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真空断路器有2大部件:一为真空灭弧室,号称真空断路器的心脏,另一为操动机构,号称真空断路器的神经中枢。操动机构为断路器完成分、合操作,对真空断路器的操作特性影响很大。操动机构又是真空断路器中机械结构最为复杂、维护工作量最大的部件。国内外的统计表 相似文献
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1我国中压真空断路器技术的发展 真空断路器一般由导电及灭弧系统,本体、传运系统及操动机构组成。其中真空灭弧室为真空断路器的心脏,操动机构为其神经中枢,两者对真空断路器至为重要。 相似文献
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真空断路器作为中压开关的主流产品,其可靠性和智能化水平对电力系统的稳定和自动化程度将产生深远的影响.作为真空断路器的一种操动机构,永磁操动机构由于具有结构简单、可靠性高等优点,目前已在真空断路器上得到广泛的应用.随着配有永磁操动机构真空断路器的应用范围越来越广泛,对永磁操动机构提出了越来越严格的要求.文中介绍了几种典型的永磁操动机构的结构和工作原理. 相似文献
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通过对高压真空断路器机械联锁机构的运动仿真,确定了拉杆两端实际的运动副——柱面副,并通过运动仿真获取柱面副的参数,对销的几何尺寸和连接结构进行改进,提高了真空断路器机械联锁机构的运动灵活性和输出角度一致性。运动仿真为真空断路器机械联锁机构的优化设计提供了充分的理论依据。 相似文献
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Extending the Application Field of Vacuum Circuit Breakers to Generators for Capacities up to 400 MW
The progress that has been achieved in the development and manufacture of vacuum circuit breakers opens the possibility of using them for a wider range of applications at power plants, including as generator circuit breakers. Such characteristics of modern vacuum circuit breakers as increased breaking capacity and high switching life are factors that make them closer in competitiveness to SF6 circuit breakers for generators with capacities up to 400 MW. The article considers problem aspects relating to clearing of short-circuit faults in the generator voltage circuits and interruption of out-of-phase making currents and no-load currents of generator transformers. Conditions leading to a longer period of time to the moment at which the switched current crosses zero are considered. It is pointed out that, unlike the IEC/IEEE Standard 62271-37-013, GOST (State Standard) R 52565-2006 does not specify the requirements for generator circuit breakers in full. The article gives the voltage drop values across the arc for different design versions of vacuum circuit breaker contacts and shows the effect the arc in a vacuum circuit breaker has on the time delay to the moment at which the current crosses zero. The standardized parameters of transient recovery voltage across the generator circuit breaker contacts are estimated along with the contact gap electric strength recovery rates ensured by modern arc quenching chambers. The switching overvoltages arising when vacuum circuit breakers interrupt short-circuit currents and no-load currents of generator transformers are analyzed. The article considers the most probable factors causing the occurrence of switching overvoltages, including current chopping, repeated breakdowns of the circuit breaker contact gap, and virtual current chopping. It is found that, unlike repeated breakdowns and virtual current chopping, an actual current chopping does not give rise to dangerous switching overvoltages. The article also determines the vacuum circuit breaker application field boundaries in which dangerous switching overvoltages may occur that would require additional measures for limiting them. 相似文献
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随着真空断路器在中压领域的发展,永磁机构在柱上开关、中压断路器上的应用,引起了开关行业的广泛关注。文章介绍了真空断路器的各种永磁机构。 相似文献
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In this paper, the authors show the necessity of using vacuum interrupters connected in series at the pole of vacuum circuit
breakers designed for a voltage of 110 kV and above to reduce the probability of restrikes up to the values required by the
corresponding standard for class C1 and C2 circuit breakers. 相似文献
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为了研究基于高耦合度分裂电抗器(high coupled split reactor,HCSR)的并联型断路器的并联均流效果,推导了简单并联及基于HCSR的并联型断路器并联支路间不平衡电流的表达式,通过分析得出结论:HCSR单臂限流电感、双臂间耦合度、选用的断路器弧阻大小等因素是影响并联型断路器均流效果的主要因素。为验证上述结论,建立了HCSR、真空灭弧室、SF6灭弧室的电路仿真模型,开展了相关仿真分析,并采用合成回路进行了对应断路器并联开断实验。仿真、实验结果与理论分析结果相符合。基于上述研究结果,最终给出了针对不同类型并联断路器的HCSR单臂电感的选取原则,以用于指导新型并联断路器的设计。 相似文献
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国内外真空断路器高电压等级开发动态 总被引:2,自引:0,他引:2
简要介绍世界各国真空开关制造公司,例如日本各公司和西门子公司开发的高电压各种等级的真空断路器技术情况。我国126 kV真空断路器开发情况。 相似文献
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真空断路器开断电机回路时 ,会产生截流过电压、多次重燃过电压及三相同时截流过电压。因此 ,在电机回路中装设真空断路器时 ,必须有完善的保护设备来限制真空断路器的操作过电压 ,以保护主设备 ,使电力系统安全、可靠、经济地运行。特别是在发电机回路中使用真空断路器时 ,更要慎重 ,除具有完善的保护措施外 ,还要考虑其绝缘水平配合、发电机回路的电容电流、切断直流分量的要求等因素 ,使真空断路器的优良性能得到充分发挥 相似文献