arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1908.01111eess.SYcs.SY
收藏

负荷模型对电力系统微分-代数系统平衡、稳定和代数流形的影响

Influence of Load Models on Equilibria, Stability and Algebraic Manifolds of Power System Differential-Algebraic System

Dan Wu, Bin Wang

摘要:

负荷模型对电压行为和电力系统暂态动态特性有很大影响。在这方面已经做了大量的工作,提出了适当的负载模型,并在瞬态过程中捕捉更好的负载行为。针对传统的电力系统微分代数方程组,研究了不同负荷模型引起的几何和拓扑变化。具体来说,我们试图揭示变形的平衡,稳定区域,和代数流形在一个连续的演变过程中的负荷模型。本文提出了几项研究结果,其中一些与传统的认识和直觉相反。一个重要的发现是,具有大比例的恒定阻抗和小比例的恒定功率的负载模型比具有相反比例的阻抗和功率的负载模型表现出更复杂的功能。复杂性的增加是彻底记录和调查的几何性质的变化和突变的拓扑不变量的意义上的平衡,稳定区域,代数流形的DAE系统。然而,大多数的变化似乎发生在代数流形的不稳定组件或附近的奇异边界曲面,这表明有限的变化的动力学行为的稳定组件。

英文摘要:

Load models have a great impact on voltage behaviors as well as power system transient dynamics. Extensive work has been done on this topic, proposing appropriate load models and capturing better load behaviors during transient. This paper presents a comprehensive study to investigate the geometric and topological changes induced by different load models for the traditional power system differential-algebraic equations. Specifically, we attempt to reveal the deformation of equilibria, stability regions, and algebraic manifolds during a continuous evolution of load model. Several findings are presented in the paper, some of which countering traditional recognitions and intuitions. A major discovery is that the load model with a large proportion of constant impedance and a small proportion of constant power exhibits much more complex features than the load model with the reversed proportions of impedance and power. The increase of complexity is thoroughly recorded and investigated by the changes of geometric properties and mutations of topological invariants in the sense of equilibria, stability regions, and algebraic manifolds for the DAE system. However, most of the changes seem to occur on unstable components of algebraic manifolds or near the singular boundary surfaces, suggesting a limited variation of dynamical behaviors on the stable component.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑