The merits of compressed air energy storage (CAES) include large power generation capacity

long service life

and environmental safety. When a CAES plant is switched to the grid-connected mode and participates in grid regulation

using the traditional control mode with low accuracy can result in excess grid-connected impulse current and junction voltage. This occurs because the CAES output voltage does not match the frequency

amplitude

and phase of the power grid voltage. Therefore

an adaptive linear active disturbance-rejection control (A-LADRC) strategy was proposed. Based on the LADRC strategy

which is more accurate than the traditional proportional integral controller

the proposed controller is enhanced to allow adaptive adjustment of bandwidth parameters

resulting in improved accuracy and response speed. The problem of large impulse current when CAES is switched to the grid-connected mode is addressed

and the frequency fluctuation is reduced. Finally

the effectiveness of the proposed strategy in reducing the impact

of CAES on the grid connection was verified using a hardware-in-the-loop simulation platform. The influence of the

k

value in the adaptive- adjustment formula on the A-LADRC was analyzed through simulation. The anti-interference performance of the control was verified by increasing and decreasing the load during the presynchronization process.