Research And Control Strategy Of Inverter Chaos Control

To realize the target of "Carbon Peak and Carbon Neutral",the energy consumption has changed from the fossil to the clean one.The inverter is an important part of the power electronic changer,and there are a large number of switching devices,which will produce a large number of switching actions during its operation,so its system belongs to a strong nonlinear system,and a series of complex nonlinear phenomena will also occur in the actual operation process,resulting in nonlinear dynamics in the operation of the system.In the paper,the nonlinear dynamic phenomena of single phase H bridge inverter are investigated,and a new control strategy is put forward to extend the stability of the system.The main research contents of this paper are summarized into the following aspects:First of all,the single phase H bridge inverter is controlled by proportional regulation,and then the discrete model is built by the gate mapping theory;bifurcation and chaos,and when one of the parameters in the system is changed,the operation status of the system will also be changed.Then the system is constructed with MATLAB/Simulink platform,and the change of operation status is validated.Secondly,the non-singular terminal sliding mode control was designed,and the nonlinear dynamics of the single-phase H-bridge inverter when using this control were studied,and its mathematic model was built firstly.Secondly,the bifurcation chart,Lyapunov index and folding chart are used to study and analyze the change of the operating state of the system when a parameter changes in the system.At last,a system is constructed with MATLAB/Simulink,which proves the superiority of non-singular end sliding mode control.It can be used as a reference and guide for the optimization of inverter.In the end,To resolve the system disturbance,an ADRC method is presented.The composition and control principle of ADRC are analyzed.The ADRC system based on single-phase H-bridge inverter is designed.Through bifurcation diagram,Lyapunov exponent,folding diagram and MATLAB/Simulink platform,it is proved that ADRC can improve the stability and anti-jamming ability of the system.