Belong to. Power electronics technology is a technology to study how to realize efficient conversion and control of electric energy through power electronic devices, including power electronic devices, circuit topology, control methods and so on. The analysis and suppression of broadband oscillation in new energy grid-connected system involves the analysis and optimization of power electronic system. Through in-depth analysis and research on broadband oscillation in new energy grid-connected system, corresponding suppression strategies and methods can be put forward to improve the stability and reliability of power electronic system.