This article presents a methodology to evaluate protection schemes in grids with nonlinear loads. For this purpose, a protection library developed in MATLAB/Simulink is presented, which is complemented with a communications system and an electric arc furnace (EAF). Subsequently, an application example is shown, in which the protection system of a steel manufacturing industry is developed, considering the linear and nonlinear loads, and tested using the methodology compound of four stages: the definition of the protections, the settings, the fault analysis, and the hardware implementation.

中文翻译：

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电弧炉保护系统的评估：一种评估方法

本文提出了一种评估带有非线性负载的电网中的保护方案的方法。为此，提供了一个在MATLAB / Simulink中开发的保护库，该保护库辅以通信系统和电弧炉（EAF）。随后，给出了一个应用示例，其中考虑了线性和非线性负载，开发了钢铁制造业的保护系统，并使用四个阶段的方法组合进行了测试：保护的定义，设置，故障分析，以及硬件实现。