Power electronics converters are indispensable parts of modern energy systems for achieving the required flexible energy conversion and transmission functions. The use of power electronics enables energy systems to fulfill critical roles in various utility applications, but at the same time necessitates imposition of stringent requirements for stability and safety purposes. Conventional linearized analysis methods usually assume that the system under study operates at a fixed point with a small range of variation. However, the dynamical behavior of power electronics systems often invalidates the small-signal assumption due to the nonlinear characteristics of power electronics devices and operations, especially when the system exhibits inevitable disturbances such as the source/load power fluctuations, device/transmission line faults, etc. This Special Issue comprises 18 papers presenting recent research trends and cutting-edge research results in the field of nonlinear dynamics in power electronics-enabled energy systems.

中文翻译：

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电力电子动力系统中的非线性动力学特刊

电力电子转换器是现代能源系统必不可少的部分，可实现所需的灵活的能源转换和传输功能。电力电子技术的使用使能源系统能够在各种公用事业应用中发挥关键作用，但同时出于稳定性和安全性的目的，有必要提出严格的要求。常规的线性分析方法通常假定所研究的系统在固定点上运行，且变化范围较小。但是，由于电力电子设备和操作的非线性特性，电力电子系统的动态行为通常会使小信号假设无效，尤其是当系统表现出不可避免的干扰，例如源/负载功率波动，设备/传输线故障，等等