As the transmission and distribution equipment vacuum one of the core components of circuit breakers , how to meet smart grid information technology, digitization, automation, interactive requirements, it has become a hot topic of research institutions and manufacturers of common concern. Some industry experts recently put forward their own views on the technical issues facing intelligent vacuum circuit breakers. From the user's future needs point of view, intelligent vacuum circuit breakers in addition to having a common function of vacuum circuit breakers, but also should have a sense of function, thinking and judgment functions and executive functions. That is to say, it not only has the function of acquiring a large amount of surrounding information sensitively and accurately, analyzing and processing the acquired information, and issuing the function of executing and monitoring the operation instruction, but also having the effective feedback and necessary operation on the analysis and processing result Features. In response to the above demand, experts said that the intelligent vacuum circuit breaker faces three technical problems that need to be overcome. The first technical issue is to realize the perceived function.

This is the basis of intelligence. The realization of this function must be based on modern sensor technology, such as voltage, current, insulation (PD), distance, speed, temperature and other information. The sensor converts the information into a signal that can be identified and processed Various signals, these signals can accurately, reliably and sensitively reflect the change of information. In addition to the sensor itself must have high quality, high reliability, but also should adapt to the working environment of circuit breakers, small size, easy to install features. The second technical problem is to realize the function of thinking judgment. This is the core of intelligence. The realization of this function must rely on modern electronic technology, computer technology and communication technology. Intelligent controller input both from the perception of access to information, but also from the implementation of functional feedback, as well as control information from the system; intelligent controller integrated information, the circuit breaker can automatically identify the working status, automatically adjust Circuit breaker operation information, automatic recording of critical information, automatic diagnosis of components and operation of circuit breakers and other intelligent thinking judgments; intelligent controller output on the one hand to provide operational instructions to perform functions, on the other hand to provide circuit breaker work on the other hand status information. In addition to smart intelligent controller to determine the function of thinking, but also must have high reliability, long life, strong anti-electromagnetic interference.

The third technical issue is the implementation of the function. Executive function must be issued by the controller operation instructions to carry out reliable operation to complete the circuit breaker closing and breaking; the same time, executive function must have high reliability, long life, small size. Has been developed and applied permanent magnet operating mechanism has been basically able to meet the intelligent circuit breaker on the implementation of functional requirements. It is learned that the realization of the function of sensing and the function of thinking and judging are the technical difficulties that the intelligent vacuum circuit breaker research and development must make great efforts to make breakthroughs. At present, many products are available and the breakthrough of the key technologies will be just around the corner.

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