Generator Emulation Controls for Photovoltaic Inverters
作者： Hussam Alatrash , Adje Mensah , Evlyn Mark , Ghaith Haddad , Johan Enslin
关键词: Emulation 、 Smart grid 、 Distributed generation 、 Electronic engineering 、 Fault (power engineering) 、 Engineering 、 Photovoltaic system 、 Inverter 、 AC power 、 Voltage regulation
摘要: The grid faces a number of challenges related to large-scale integration intermittent distributed generation (DG) such as photovoltaics (PV). Power quality include voltage regulation issues, flicker, and frequency volatility. Operational the need for extension command-and-control infrastructure millions devices anticipated on low-voltage (service) side distribution network. This paper presents an advanced grid-tied inverter controls concept designed address challenges. is based reproducing favorable characteristics traditional generators that result in load-following tendencies, accordingly dubbed Generator Emulation Controls (GEC). Traditional are analyzed with specific focus inertial dynamics controlled impedance. Details GEC then presented, its implementation outlined evolution conventional controls. followed by examination system impact GEC-operated devices. allows DG inverters perform support, reactive power compensation, fault ride-through. also form scalable inverter-based microgrids, capable operating mode or separating supporting islanded load. Simulation results presented examine losses across feeder. Two experimental test beds used demonstrate transient suppression, microgridding capabilities.
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