Nuclear power station digital protection control system

Abstract

The invention discloses a nuclear power station digital protection control system. The system comprises at least one sub protection control system, the sub protection control system comprises three mutually independent safety protection cabinets, each safety protection cabinet performs threshold determining on received onsite acquisition signals and sends a determination result to other safety protection cabinets, and the safety protection cabinets receiving the determination results perform logic operation on the received determination results with the determination results of their own and take results of the logic operation as motion instructions of the cabinets for external output. Compared to the prior art, through designing a digital computer control system and providing the multiple sub protection control systems with logic operation and determining functions, misoperation and failure operation probabilities of the control system are substantially reduced, and the reliability, the visibility and the operability of the control system are improved.

Description

technical field [0001] The invention belongs to the field of nuclear power, and more specifically, the invention relates to a protection control system of a nuclear power plant. Background technique [0002] The traditional safety-level protection control system of nuclear power plants is based on analog and relay protection circuits, and the anti-interference performance of analog circuits is poor, and analog signals cannot be processed and logically judged by computer processors. Compared with the digital system, the implementation of this analog system is relatively backward in terms of reliability, availability, visibility, operability, and reduction of human errors. In addition, the simulation system is complicated to operate in terms of periodic testing and maintenance, and the cost of equipment maintenance is high. [0003] Most of the existing nuclear power units were built in the last century, and their protection and control systems also use relatively backward te...

AI Technical Summary

Problems solved by technology

[0002] The traditional safety-level protection control system of nuclear power plants is based on analog and relay protection circuits, and the anti-interference performance of analog circuits is poor, and analog signals cannot be processed and logically judged by computer processors. Compared with the digital system, the implementation of this analog system is relatively backward in terms of reliability, availability, visibility, operability, and reduction of human errors.

In addition, the simulation system is complicated to operate in terms of regular tests and maintenance, and the cost of equipment maintenance is high

[0003] Most of the existing nuclear power units were built in the last century, and their protection and control systems also use relatively backward technologies such as analog circuits and relay protection. At present, there are no digital transformation cases of the protection and control systems of nuclear power plants that have been implemented.

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