Nuclear power plant diversified protection signal analog simulation simulation method and system

Abstract

The invention provides a nuclear power plant diversified protection signal analog simulation simulation method and system. The method comprises the following steps that: the type of a protection signal is acquired; when the type is a switching quantity signal, a signal inlet terminal is short-circuited by using a short-circuiting line to realize connection in the analog simulation of the switching quantity signal, and the signal inlet terminal is isolated to realize disconnection in the analog simulation of the switching quantity signal; when the type is a passive analog quantity signal, an adjustable resistor is connected to a signal inlet terminal of a passive analog quantity conditioning distribution card, and the analog simulation of the passive analog quantity signal is realized by adjusting a resistance value; and when the type is an active analog quantity signal, an adjustable resistor is connected to the signal inlet terminal of the passive analog quantity conditioning distribution card, a standby terminal current output signal of the passive analog quantity conditioning distribution card is led to the input end of an active analog quantity conditioning distribution card through a short-circuit line, and the analog simulation of the active analog quantity signal is achieved by adjusting a resistance value. The nuclear power plant diversified protection signal analog simulation method is simple, efficient, low in cost and high in reliability.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant debugging, in particular to a method and system for simulating and simulating diversified protection signals of a nuclear power plant. Background technique [0002] The function of the nuclear power plant reactor protection system is to protect the integrity of the three safety barriers of the nuclear power plant (ie, the fuel cladding, the primary circuit pressure boundary and the containment vessel). The comprehensive verification of its protection function is crucial to the safe operation of the nuclear power plant. During the full-cycle reactor protection system test and verification process, including the unit debugging stage, the reactor protection commissioning stage during the thermal functional test of the unit, the nuclear power plant instrumentation and control power loss test (COC ) stage, the input signal or simulation of the reactor protection system is required to be ava...

AI Technical Summary

Problems solved by technology

The diversified protection input signal simulation method realized by pure software combined with a signal generator has the following defects: in the full-cycle debugging stage, a large number of signal forcing points will be added to the DCS system special software tool, which requires a large workload and requires Frequent signal force and cancel force operations, during this process, there is a high risk of false triggering of protection functions due to human failures such as operational errors and unexpected power failures in DCS cabinets

The diversification protection input signal simulation method realized by the external simulation platform has the following defects: the construction of the simulation platform needs to lay and connect a large number of simulation signal cables, the workload is large, the construction period is long, and the labor cost and maintenance cost are high.

The existing external simulation platform implementation method requires a large workload, long construction period, high labor costs and maintenance costs to build a simulation platform, and at the same time relies heavily on the stability and reliability of the external power supply

Both existing simulation techniques have obvious defects and limitations

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