0. Introduction Thermal power plants remain a cornerstone of global electricity generation, but their environmental footprint continues to draw attention, particularly concerning nitrogen oxides (NOx).

Background The #1 unit of a power plant is a 660 MW ultra-supercritical coal-fired unit. The boiler in use is a B&WB-2091/26.15-M model, designed and

The safe and economical operation of a boiler depends on the precise control of key parameters. Among these, the stability of the boiler drum liquid