The strong randomness

weak support

low resilience and interaction with the traditional power system of the scaled renewable energy integration system pose new challenges to the security and stability of the power system.The problem of oscillation induced by the interaction between electronic equipment and power system is prominent

so how to realize the risk assessment of wide-band oscillation in renewoble energy grid-connected systems has become a key problem to be solved urgently.This paper aims to conduct in-depth analysis on the wide-band oscillation risk in the renewable energy integration system and propose corresponding control measures.Firstly

the characteristics of the renewable energy integration system and the generation mechanism and transmission path of wide-band oscillation are analyzed.Secondly

the model of large-scale new energy grid-connected system based on converter is established

and the risk assessment method of wide-band oscillation is constructed.Finally

an actual large-scale new energy access system is selected for risk assessment and analysis

and the quantitative analysis of oscillation stability is realized according to the stability criterion of logarithmic derivative based on the frequency characteristic of transfer function.