为彻底解决核电厂数字化控制系统(DCS)中，信号质量位相关参数的设置所导致的系统拒动和误动问题，通过分析目前的设计现状分析常规解决方案中的局限性，提出引入核电厂状态这一变量对DCS所执行的功能进行确认的设计思路.该方法不仅解决了质量位的设置问题，还在一定程度上简化了操纵员的操作，提高了核电厂DCS的安全性和可用性，进而推动了核电厂的智能化和无人化的发展.通过利用稳态下的热工物理参数和状态转换过程中的人员手动操作来识别核电厂状态的方法能够确保DCS准确地执行其预期的功能,避免非预期事件的发生.

The setting of parameters of signal quality bit will cause the failure on demand or spurious failure of digital control system(DCS) in nuclear power plant. To solve this problem, limitations of general scheme based on the current design status are analyzed. A new design method is proposed. The function of DCS is confirmed by the status of nuclear power plant. It not only solves the problems caused by quality bit setting, but also simplifies the operator’s operation to a certain extent. It improves the safety and availability of the nuclear power plant and promotes intelligence and unmanned developments in the nuclear power plant. Thermal physical parameters in the steady state and manual operation in the process of state transition are used to identify the state of the nuclear power plant. It helps DCS to perform expected functions. And it can avoid the occurrence of unexpected events.