Novel grid?forming control of PMSG?based wind turbine for integrating weak AC grid without sacrificing maximum power point tracking

Traditional permanent magnet synchronous generator (PMSG)-based wind turbine (WT) normally utilises phase lock loop (PLL) for obtaining accurate angle of AC grid to make sure maximum power point tracking (MPPT). However, a weak system with low short circuit ratio (SCR) and high control bandwidth PLL might have impaired effects on the stability system. To overcome these, novel PMSG-based WT forming ability PMSG integrating very is first proposed in this study. Grid-side converter (GSC) emulates inertia response (SG) by artificially coupling DC-link voltage frequency based certain droop property, while magnitude regulated according deviation controlling modulation index GSC. This scheme can realise synchronisation without mimicking natural characteristic SG. Small-signal analysis indicates capacitor energy be exerted support during disturbances, damping provided spontaneously alternating magnitude. More importantly, MPPT property not compromised providing system, related coefficient easily tuned satisfying requirement. Non-linear simulations one connected large SG considering sudden change active reference variable speeds been studied verify effectiveness grid-forming control.