Enhancement of Grid Connected PV Arrays Fault Ride Through and Post Fault Recovery Performance
作者： Aslan Mojallal , Saeed Lotfifard
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摘要: In this paper, a novel nonlinear control system for enhancing the low-voltage ride through capability and post-fault recovery performance of two-stage grid connected PV arrays (GCPAs) is proposed. The proposed scheme composed two controllers: 1) finite-time sliding mode (FTSMC) 2) proxy-based (PBSMC). FTSMC, which assures finite time convergence tracking error, controls dc/dc converter GCPA during voltage sags to assure dc-link capacitor does not exceed its limits. PBSMC dc/ac inverter. provides accurate fast feature normal condition (similar PID controller) capable very smooth resuming desired reference value/trajectory after large disturbances that may lead signal Therefore, period, exits saturation faster smoother significantly enhances GCPA. advantages schemes are demonstrated using simulation results.
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