![]() ![]() As a result, this paper is an important first step toward developing an improved model that more accurately assesses dc arc-flash risk in a PV system. It is also found that a PV source acts as a sustainable constant-current source during an arcflash event. The study reveals that none of the available models adequately represent real-world hazards. ![]() This paper quantifies the thermal hazards from arc flash in a real-world 1000-kWdc PV plant by measuring arc current, arc voltage, and incident energy (IE) and then more » compares results against existing IE models. For PV, the nonlinearity of the power source (i.e., PV modules) creates an additional level of uncertainty for theoretical approaches. Most dc arc-flash literature is based on the theory and, when their theoretical calculations are applied to real-world conditions, can significantly deviate from actual measured values. There is a growing amount of high-power dc equipment being deployed, including solar photovoltaic (PV) plants, but very few studies have measured and quantified dc arc-flash risks. Examples of the application of the proposed calculation method to the test measurements are included. Detailed explanations are provided regarding the effect of PV module I-V and P-V curves under arcing conditions. This paper provides a comparative analysis of a proposed arc-flash incident energy calculation method against different laboratory tests including those performed by NREL. This paper discusses the behavior of PV systems under arc more » conditions and presents the results of available methods to estimate the dc arc flash incident energy. Because of the fast proliferation of PV systems and the lack of formal equivalent calculation guidelines such as IEEE 1584 for AC systems, it has been necessary to rely on different equations and models presented by various researchers over the last few years. Emphasis is placed on the electrical safety aspect of DC arc flash incident energy evaluation. This paper focuses on the understanding of how photovoltaic (PV) technology behaves under dc arc conditions. Renewable energy systems continue to be one of the fastest growing segments of the energy industry. Examples of the application of the proposed calculation method to the test measurements are =, number = 3, Detailed explanations are provided regarding the effect of the PV module current-voltage (I-V) and power-voltage (P-V) curves under arcing conditions. It provides a comparative analysis of a proposed arc-flash IE calculation method against different laboratory tests, including those performed for this article at the National Renewable Energy Laboratory (NREL). This article discusses the behavior of PV systems under arc conditions and presents the results of the available methods to estimate the dc arc-flash IE. ![]() Because of the fast proliferation of PV systems and lack of formal equivalent calculation guidelines, such as IEEE 1584 for ac systems, it has been necessary to rely on different equations and models presented by various researchers over the last few years. Emphasis is placed on the electrical safety aspect of dc arc-flash incident energy (IE) evaluation. This article focuses on the understanding of how photovoltaic (PV) technology behaves under dc arc conditions. ![]()
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