Analysis and suppression of subsynchronous oscillation caused by direct-driven fan connected to AC power grid
In recent years,with the continuous increase in the penetration rate of a large proportion of new energy,the phenomenon of subsynchronous oscillation caused by the grid connection of direct drive fans has attracted people's attention.The mechanism of subsynchronous oscillation is elucidated through the introduction of the grid connection model and the concept of short-circuit ratio for direct drive fans.It is proposed to install Static VAR compensator on the side of high voltage bus to suppress the occurrence of subsynchronous oscillation,and the control strategy of Static VAR compensator is analyzed and introduced.The results indicate that this control strategy can effectively suppress subsynchronous oscillation and ensure the safety and stability of the power system.
direct drive fansubsynchronous oscillationstatic var compensatorshort-circuit ratio
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