The increasing use of photovoltaic systems entails the use of new technologies to improve the efficiency and power quality of the grid. System performance is constantly increasing, but its reliability decreases due to factors such as the uncontrolled operation, the quality of the design and quantity of components, and the use of nonlinear loads that may lead to distortion in the signal, which directly affects the life of the system globally. This article presents an analysis of the reliability of a single-phase full-bridge inverter for active power injection into the grid, which considers the inverter stage with its coupling stage. A comparison between an L filter and an LCL filter, which comprise the coupling stage, is made. Reliability prediction is based on metrics, failure rate, mean time between failures, and total harmonic distortion. The analysis and numerical simulation are performed. Finally, filter considerations are suggested to extend the reliability of the inverter in a photovoltaic system.

中文翻译：

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光伏并网逆变器的 L 与 LCL 滤波器：可靠性研究

越来越多地使用光伏系统需要使用新技术来提高电网的效率和电能质量。系统性能在不断提高，但由于运行不受控、设计质量和元件数量、使用非线性负载等因素可能导致信号失真，从而直接影响其使用寿命等因素，导致其可靠性下降。系统全局。本文介绍了用于将有功功率注入电网的单相全桥逆变器的可靠性分析，其中考虑了逆变器级及其耦合级。对包含耦合级的 L 滤波器和 LCL 滤波器进行了比较。可靠性预测基于指标、故障率、平均故障间隔时间和总谐波失真。进行了分析和数值模拟。最后，建议考虑考虑滤波器以扩展光伏系统中逆变器的可靠性。