Aiming at solving the problems of non-linearity

slow response and large disturbance of frequency conversion speed regulation control system of auxiliary equipments(fan and pump) in power plants

a sliding mode adaptive robust control(SMARC) method based on frequency conversion speed regulation is proposed. By using the characteristics of SMARC

the input coefficient characteristics of the system can be approached in real time

and the system model errors and external disturbances can be reduced to a minimum range. Through sliding mode control

the internal parameters of the system can be changed. The control eliminates the speed tracking error of motor variable frequency speed regulation

and realizes the high precision tracking of motor to the given speed. Simulation and practical application of the SMARC of open water system of a gas turbine is carried out. The results show that

in the starting moment of variable frequency speed regulation motor and after reaching stable speed

when sudden torque is added in normal operation

the SMARC can exhibit strong speed tracking ability

and its anti-load disturbance has more advantages than the conventional PID control

and the overshoot is smaller. In the starting process of the motor

the SMARC control error is only 1.75%. The field application also proves that this method is effective and feasible.