Aiming at the problem of large useless power of equipment in power grid operation, in order to improve this situation and increase the active power output of the system, this study designed a comparison scheme of micro-control (MCU) correction circuit and intelligent power module (IPM) correction circuit in the power grid. The result is that the MCU uses a micro-control unit and PWM combined control technology; IPM uses high-power transistors for circuit verification and correction. The amplitude-frequency characteristics and power distortion correction effects of the two circuits are compared; then the parameter changes of the two circuits are compared. The advantages and disadvantages of the two correction circuits and their respective scope of application are analyzed. The results show that through Proteus simulation, it is found that the critical point of the test power of the MCU correction circuit and the IPM correction circuit is 3.5KW; the stability of the two correction methods is analyzed using MATLAB, and it is found that the MCU critical stability correction power is 3.0KW, and the IPM critical stability correction power is 2.8KW. After comparative study and analysis of the advantages and disadvantages of the two correction methods, the applicable conditions of the two correction circuits are clearly defined.