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WIREs Energy Environ.
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Role of fault ride‐through strategies for power grids with 100% power electronic‐interfaced distributed renewable energy resources

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Electricity networks are evolving rapidly with the large‐scale integration of power electronic (PE)‐interfaced distributed renewable energy resources (DRERs). With this rapid deployment of PE‐interfaced renewables, requirements set for the PE‐interfaced DRERs have also evolved to maintain grid security and reliability. Fault ride‐through (FRT) is an essential requirement which should be adhered by DRERs, which will ensure security and reliability of the power system during grid faults. This paper critically reviews the existing FRT standards (grid‐code requirements) and FRT strategies implemented/ proposed for major DRERs, such as wind energy conversion systems (WECSs), solar photovoltaic (PV) systems, and microgrids. According to the review, robust FRT strategies are implemented/proposed DRERs, however, the FRT grid codes are presently developed with the perspective of both synchronous and renewable generation operating in the power system. However, this current approach should be augmented considering 100% PE‐based renewable energy scenarios, and emerging issues, such as high penetration of PE‐interfaced small‐scale renewable generators (e.g., domestic solar‐PV systems) and recurring grid faults, to achieve a sustainable renewable energy future. This article is categorized under: Concentrating Solar Power > Systems and Infrastructure Wind Power > Systems and Infrastructure Photovoltaics > Systems and Infrastructure
Low‐voltage ride‐through (LVRT) requirement for wind farms. (a) typical LVRT profile and (b) LVRT requirements specified in various grid codes
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Layout of a typical microgrid
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Single line diagram of photovoltaic (PV) systems with fault ride‐through (FRT) capability. (a) Single‐stage PV inverter. (b) Two‐stage PV inverter
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Configuration of power electronic (PE)‐interfaced wind energy conversion systems (WECSs). (a) doubly‐fed induction generator (DFIG) and (b) full‐converter wind generator (FCWG)
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Power grid evolution with power electronic (PE)‐interfaced distributed renewable energy resources (DRERs)
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Three main approaches to microgrid fault ride‐through (FRT)
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Doubly‐fed induction generator (DFIG) low‐voltage ride‐through (LVRT) performance with and without fault ride‐through (FRT) strategies. (a) DC‐link voltage and (b) rotor current
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Voltage support requirement for wind farms
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Photovoltaics > Systems and Infrastructure
Wind Power > Systems and Infrastructure
Concentrating Solar Power > Systems and Infrastructure

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