Bypass device, method and system for nuclear power plant instrument control system

Abstract

The invention provides a bypass device, method and a system for a nuclear power station instrument control system, and aims at solving the technical problems of coupling and increasing test workload by controlling the bypass device through software in the prior art. The device comprises a fiend signal receiving unit, a test signal receiving unit, a bypass signal receiving unit and a conduction control unit. The conduction control unit comprises a hardware control circuit. The hardware control circuit is arranged to convert the corresponding bypass signal into the analog signal inputted to thehardware control circuit based on the bypass signal received by the bypass signal receiving unit and control circuit conduction between the test signal receiving unit and the control station in the nuclear power plant instrument control system according to whether the hardware control circuit receives the analog signal. Therefore, the bypass function and the protection logic in the control stationcan be realized by the hardware circuit without coupling, and influencing the automatic logic by the bypass logic can be avoided.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant instrument control systems, in particular to a bypass device, method and system for nuclear power plant instrument control systems. Background technique [0002] At present, in nuclear power plants, many bypass devices are usually set in the instrument and control system of the nuclear power plant. Such as figure 1 As shown, it is a partial schematic diagram of a bypass device used in the instrument and control system of a nuclear power plant in the prior art. The bypass design is usually realized by software logic; Bypass processing operation; the implementation of bypass logic is as follows: while the control station accepts the bypass signal of this channel, it also accepts the bypass signals from other channels. First, it judges whether other channels have been bypassed. Channel bypass, if not, then this channel will be bypassed. [0003] But the inventor finds in the process of...

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Problems solved by technology

[0007] In order to solve technical problems such as coupling and increased test workload existing in the prior art through software control bypass devices, the present invention provides a bypass device, method and system for nuclear power plant instrumentation and control systems, which simplifies wiring through hardware circuits and prefabricated cables , can realize the bypass function and the protection logic in the control station, without coupling, avoiding the influence of the automatic logic due to the bypass logic

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