In electric power ancillary service market

coal-fired thermal power units are facing new opportunities and challenges in participating in frequency regulation auxiliary services. During operation of large-capacity(ultra) supercritical coal-fired unit boilers

the energy storage is limited and the AGC frequency regulation response performance are difficult to adapt to the increasing frequency regulation demand of the ancillary service market. To solve these problems

the influence of different energy states of grid and source on frequency regulation is analyzed

and a self-adaptive frequency regulation control strategy based on grid-source operation state is designed. This strategy is based on the boiler energy storage state and the grid frequency regulation demand

and can adaptively undertake the AGC frequency regulation task in the frequency regulation ancillary service market. It fully exerts the frequency regulation potential of the unit

and is beneficial to fast energy balance and parameter recovery stability of the unit itself

which realizes the grid-source goal coordination of the safe and stable operation of the unit and the improvement of the comprehensive frequency regulation performance index of the unit.