Impedance Modeling and Stability Analysis of Direct Drive Permanent Magnet Synchronous Generators

Peipeng Zhou, Guangfan Li, Ruihua Song

Abstract


Sub-synchronous oscillation (SSO) problems exist in wind power gathering areas as northwest China. To make clear mechanism of SSO induced by large capacity direct drive permanent magnet synchronous generators (D-PMSG), linear impedance model of grid side converter (GSC) is built and verified by simulation. Closed-loop transfer functions are deduced, and stability of D-PMSG connected to weak network, together with the influencing factors, are analyzed by impedance method, which helps to analyze and solve SSO problems in wind farms.

Keywords


impedance modeling, stability, direct drive permanent magnet synchronous generator, sub-synchronous oscillation


DOI
10.12783/dteees/appeec2018/23620

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