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Development of Hybrid Fault Current Limiting Circuit Breaker with Environmentally Benign Gases

环保气体混合型故障限流断路器的研制

基本信息

批准号：
13555080
负责人：
MATSUMURA Toshiro
金额：
$ 2.43万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555080/
关键词：
Alternative Gases of SF_6 Global Warming Circuit Breaker Current Limiting H_2 Superconducting Arc 脱SF_6ガス環境低負荷超電導 CO_2ガス遮断機 SF6ガス環境

项目摘要

In the present study, a current-interruption experiment was performed to examine the interrupting capability for a hybrid circuit-breaker consisting of a load-break switch filled with H_2 and an air contactor connected in series. As far as the present experimental conditions are concerned, it is found that the hybrid model is capable of breaking a current with a peak value of 950 A. Compared with a double-switch model using Air in both quenching media which can interrupt a current with a peak value of 600 A, the current interrupting capability of the hybrid circuit-breaker was proved to be higher than that of the double-switch Air circuit-breaker due to the difference of the thermal and electrical conductivity between H_2 and Air. In other words, the hybrid model using Air and H_2 as arc-quenching media improves the interrupting performance. Furthermore, we have proposed a hybrid system in which a fault current limiter (FCL) and a circuit breaker (CB) are combined in' series. The present study describes the breaking ability of a small model of a hybrid fault current limiting circuit breaker (hybrid FCLCB), which consists of an air relay unit and a flux flow resistive type of a superconducting FCL unit with a high Tc B2223 bulk. We took two Bi2223 elements connected in series as the minimum configuration of the flux flow resistive type of the FCL and investigated the generation process of the flux flow resistance and the contact resistance. The current limiting breaking performance was investigated for the small model of the hybrid FCLCB that was constructed by connecting the minimum unit of the FCL to the relay contactor. The hybrid FCLCB for the 6.6 kV power distribution system was designed from the experimentally obtained results in the small model.

在本研究中，进行了电流中断实验，以检验由充满H_2的负载断开开关和串联的空气接触器组成的混合式断路器的中断能力。就目前的实验条件而言，发现混合模型能够分断峰值为950 a的电流。与两种淬火介质均采用空气的双开关断流模式相比，由于H_2和空气的导热性和导电性不同，混合式断路器的断流能力要高于双开关空气断流模式。也就是说，以空气和H_2作为灭弧介质的混合模型提高了断流性能。此外，我们还提出了一种将故障限流器（FCL）和断路器（CB）串联在一起的混合系统。本研究描述了一种小型混合型故障限流断路器（hybrid FCLCB）的分断能力，该断路器由空气继电器单元和高Tc B2223体积的磁通流电阻型超导FCL单元组成。以2个Bi2223元件串联作为通量流阻型FCL的最小配置，研究了通量流阻和接触电阻的产生过程。研究了将FCL的最小单元与继电器接触器连接构成的混合式FCLCB的小模型的限流分断性能。根据小模型实验结果，设计了6.6 kV配电系统的混合FCLCB。