Under the situation of slow growth of power consumption

excessive coal-fired power units and high-speed growth of non fossil energy

deep peak load regulation or low-load operation of coal-fired power will become normal. Taking a 330 MW thermal power plant unit as an example

the automatic regulation quality of the unit under deep peak shaving is comprehensively evaluated and investigated

and the problems existing in coordinated control

steam temperature control and feed water control are deeply analyzed. Through carrying out on-site equipment management

optimizing load command feedforward function and control logic of minimum flow recirculation valve

and simulating grid frequency

primary frequency regulation test is carried out. The main steam pressure

superheated steam temperature and feed water control of the unit have been improved significantly

and the unit has reached the capacity of flexible deep peak regulation at 30% rated load and long-term safe and stable operation.