The Impact of Harmonics Generated by New Energy Grid Connected Inverters on the Power Grid and Overview of Suppression Technologies

In the context of today's "Carbon peaking and carbon neutrality goals" goals, the demand for power quality in the power grid is constantly increasing. With the integration of various devices sensitive to power quality into the grid, such as communication or instrumentation equipment, there are stricter requirements for the harmonic content of inverter output power. Therefore, it is necessary to strengthen the research on inverter harmonic interference control strategies to improve power quality and meet grid access standards. At the same time, due to geographical limitations and other factors, many grid connected inverters are far away from the main power grid, resulting in weak and complex grid interfaces, which can lead to non-ideal grid environments such as background harmonics and weak electricity grids. This can cause problems such as grid current distortion and low-frequency oscillation, threatening the safe operation of equipment. Therefore, further research is needed on the stability control strategy of inverters under normal operating conditions and non-ideal grid environments.