同步(交流)
计算机科学
电力系统
功率(物理)
自动频率控制
控制理论(社会学)
电子工程
工程类
控制(管理)
电信
物理
频道(广播)
人工智能
量子力学
作者
Xiuqiang He,Verena Häberle,Florian Dörfler
标识
DOI:10.1109/tcns.2024.3420983
摘要
In this article, we study phase–amplitude multivariable dynamics in converter-based power systems from a complex-frequency perspective. Complex frequency represents the rate of change of voltage amplitude and phase angle by its real and imaginary parts, respectively. This emerging notion is of significance as it accommodates the multivariable characteristics of power networks, where active power and reactive power are inherently coupled with both voltage amplitude and phase. We propose the notion of complex-frequency synchronization to study the phase–amplitude multivariable stability issue in a power system with dispatchable virtual oscillator-controlled converters. To achieve this, we separate the system into linear fast dynamics and approximately linear slow dynamics. The linearity property makes it tractable to analyze fast complex-frequency synchronization and slower voltage stabilization. From the perspective of complex frequency and complex-frequency synchronization, we provide novel insights into the equivalence of dispatchable virtual oscillator control and complex-power–frequency droop control, stability analysis methods, and stability criteria. Our study offers a practical solution to address challenging stability issues in converter-based power systems.
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