Abstract ：To solve the chaos problem of inverter in new energy generation system，a regulation scheme of

H-bridge inverter based on active disturbance rejection contro（l ADRC）was proposed. Aiming at the phenomenon of poor steady-state and dynamic characteristics of inverters in chaotic state，a discrete model of the inverter was

developed to control the chaos by establishing tracking differentiators，extended state observers，and state error

feedback control laws. Through bifurcation diagram，folding diagram and simulation，the results show that the

stability range of the H-bridge inverter based on ADRC control is expanded by 45% compared with the H-bridge

inverter based on proportional control，which effectively suppresses the occurrence of chaos. It can be concluded that the control strategy can restrain the chaotic behavior of the system and broaden the stable working range of the system.

      Key words：active disturbance rejection contro（l ADRC）；H-bridge inverter；discrete models；chaos；bifurcation diagram