论文标题
用可变的宽区域阻尼控制的动力系统的简化稳定性评估
Simplified Stability Assessment of Power Systems with Variable-Delay Wide-Area Damping Control
论文作者
论文摘要
HVDC和事实等电力电子设备可用于改善大型电力系统中衰减区域间模式的阻尼。这涉及使用通过通信网络传输的广域反馈信号。闭环系统的性能受到与广域信号相关的延迟的强烈影响。此延迟的随机性质引入了开关线性系统模型。对这种系统的稳定性评估需要基于线性矩阵不平等的方法。随着系统大小的增加，这使得稳定性分析变得更加复杂。为了应对这一挑战，本文提出了一种延迟处理策略，以简化离散域中的建模和分析。与现有的稳定评估技术相反，提出的方法是有利的，因为可以通过简化的分析来准确预测稳定性以及阻尼性能。通过一系列补偿领带的2个面积4机电力系统的案例研究对所提出的方法进行了验证。结果发现结果符合所提出的简化分析的预测。
Power electronic devices such as HVDC and FACTS can be used to improve the damping of poorly damped inter-area modes in large power systems. This involves the use of wide-area feedback signals, which are transmitted via communication networks. The performance of the closed-loop system is strongly influenced by the delay associated with wide-area signals. The random nature of this delay introduces a switched linear system model. The stability assessment of such a system requires linear matrix inequality based approaches. This makes the stability analysis more complicated as the system size increases. To address this challenge, this paper proposes a delay-processing strategy that simplifies the modelling and analysis in discrete-domain. In contrast to the existing stability assessment techniques, the proposed approach is advantageous because the stability, as well as damping performance, can be accurately predicted by a simplified analysis. The proposed methodology is verified with a case study on the 2-area 4-machine power system with a series compensated tie-line. The results are found to be in accordance with the predictions of the proposed simplified analysis.
