Steam generator water-level control method and device and nuclear power plant of nuclear power generating unit

The invention is applied to the field of nuclear power control and provides a steam generator water-level control method, device and nuclear power plant of a nuclear power generating unit. The method comprises the following steps of: detecting a parameter associated with steam generator water-level control; obtaining an operation inlet and an equipment operating state associated with the steam generator water-level control; outputting the detected parameter and the obtained operation inlet and equipment operating state to a steam generator water-level control main interface; carrying out functional attribute classification on the detected parameter and the obtained operation inlet and equipment operating state; setting the layout of the steam generator water-level control main interface according to a result of the functional attribute classification; and receiving a steam generator water-level control command and executing the corresponding steam generator water-level control operation. In the embodiment, af