Method and system for setting default value of nuclear power plant digital instrument and control system

Abstract

The invention discloses a method for setting a default value of a nuclear power plant digital instrument and control system. The method includes the steps of receiving a DCS signal of the nuclear power plant digital instrument and control system, judging whether the DCS signal of the nuclear power plant digital instrument and control system is effective or not, and if the signal is judged to be ineffective, setting the default value of the DCS signal of the digital instrument and control system to be a value of the last effective signal. Compared with the prior art, the method for setting the default value of the nuclear power plant digital instrument and control system has the advantage that the default value of the nuclear power plant digital instrument and control system can be rapidly and effectively set. In addition, the invention further discloses a system for setting the default value of the nuclear power plant digital instrument and control system.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and more specifically, the invention relates to a default value setting method and system for a digital instrument control system of a nuclear power plant. Background technique [0002] Digital control system (Digital Control System, DCS) mainly includes: distributed control system, programmable logic controller (Programmable Logic Controller, PLC) and field bus control system (Fieldbus Control System, FCS) three. Compared with the default value in the relay mode of the conventional instrument control system, the DCS introduced by the domestic nuclear power plant usually completes the setting of the default value through the software module, adding the invalidity judgment and automatic selection function of the signal. The default value refers to the substitute value adopted by the DCS for the failure signal after the DCS determines that the signal is invalid. Using the default value can re...

AI Technical Summary

Problems solved by technology

It is found in the research that the default value setting methods are not the same for DCS system platforms of different manufacturers, and there is no set of standardized and standard default value analysis methods and setting methods in the prior art, resulting in the failure of the DCS when the DCS fails. Failure to resume operations in a timely and efficient manner

At the same time, even though some devices provide the default setting method of "set value", in actual operation, from the perspective of unit operation, when the signal fails, the "set value" still cannot avoid the signal failure. The disturbance introduced by the unit control is not conducive to the stable operation of the unit

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