论文标题
基于转换器的电源系统中复杂下垂控制的非线性稳定性
Nonlinear Stability of Complex Droop Control in Converter-Based Power Systems
论文作者
论文摘要
在这封信中，我们研究了基于转换器的功率系统的非线性稳定性问题，其中转换器动力学受复杂的下垂控制控制。这种复杂的下垂控制增强了众所周知的功率频率（P-F）下垂控制，事实证明与最先进的可调度虚拟振荡器控制（DVOC）相当。在这方面，它被认为是一种有希望的网格形成解决方案，可以解决未来电源系统中转换器的高渗透率。在先前的工作中，通过预先指定标称同步稳态稳态证明了DVOC的全局稳定性（即复杂的下垂控制）。但是，对于一般的（即下垂）同步稳态的一般情况，稳定性问题需要进一步研究。在这封信中，我们提供了参数条件，在该条件下存在非传统同步稳态，并且该系统几乎相对于这种非社会同步稳态在全球渐近稳定。
In this letter, we study the nonlinear stability problem of converter-based power systems, where the converter dynamics are governed by a complex droop control. This complex droop control augments the well-known power-frequency (p-f) droop control, and it proves to be equivalent to the state-of-the-art dispatchable virtual oscillator control (dVOC). In this regard, it is recognized as a promising grid-forming solution to address the high penetration of converters in future power systems. In previous work, the global stability of dVOC (i.e., complex droop control) has been proven by prespecifying a nominal synchronous steady state. For a general case of non-nominal (i.e., drooped) synchronous steady states, however, the stability problem requires further investigation. In this letter, we provide parametric conditions under which a non-nominal synchronous steady state exists and the system is almost globally asymptotically stable with respect to this non-nominal synchronous steady state.
