As one of the core components of power transmission and distribution equipment, vacuum circuit breakers, how to meet the requirements of smart grid informatization, digitization, automation, and interaction have become a hot topic for research institutions and manufacturers. Some industry experts recently put forward their own opinions on the technical problems faced by intelligent vacuum circuit breakers. From the point of view of the future needs of users, intelligent vacuum circuit breakers must have a sensing function, a thinking judgment function, and an execution function in addition to the general functions of a vacuum circuit breaker. That is, not only the function of acquiring a large amount of surrounding information sensitively and accurately, but also the function of analyzing and processing the acquired information, and issuing the operation instruction and monitoring, and also having effective feedback and necessary operations on the results of analysis and processing. Features. In response to these needs, experts said that intelligent vacuum circuit breakers face three technical problems that require breakthroughs. The first technical problem is to implement awareness. This is the basis of intelligence. The implementation of this function must be based on modern sensor technology, such as voltage, current, insulation (discharge), distance, speed, temperature, etc. The sensor will convert this information to be recognized and processed. All kinds of signals, these signals can accurately, reliably and sensitively reflect the changes of information. In addition to the high quality and high reliability of sensors, they should also be adaptable to the working environment of circuit breakers, small in size, and easy to install. The second technical problem is to realize the function of thinking and judgment. This is the core of intelligence. The realization of this function must rely on modern electronic technology, computer technology and communication technology. The input of the intelligent controller includes information from the sensing function, information from the feedback of the execution function, and control information from the system. After the intelligent controller synthesizes these information, it can automatically identify the working status of the circuit breaker and adjust automatically. Circuit breaker operation information, automatic recording of key information, automatic diagnosis of circuit breaker components and operations, and other intelligent thinking; intelligent controller output on the one hand to provide operational instructions for the implementation of the function, on the other hand provide the system circuit breaker work status information. In addition to the intelligent thinking judgment function, the intelligent controller must also have high reliability, long life, and strong anti-electromagnetic interference. The third technical issue is to implement the executive function. The execution function must be operated reliably according to the operation instructions issued by the controller to complete the closing and opening of the circuit breaker; at the same time, the execution function must have the functions of high reliability, long life, and small size. The permanent magnet operating mechanisms that have been developed and applied have basically met the requirements of intelligent circuit breakers for performing functions. The realization of the perception function and the thinking and judgment function is the technical difficulty that the intelligent vacuum circuit breaker must make great efforts to carry out the research and breakthrough. At present, there are many products available, and the breakthrough of the key technology will be just around the corner.
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