arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2302.06326eess.SYcs.SY
收藏

高斯随机扰动下线性化电力系统状态方差的显式公式

Explicit formulas for the Variance of the State of a Linearized Power System driven by Gaussian stochastic disturbances

Xian Wu, Kaihua Xi, Aijie Cheng, Hai Xiang Lin, Jan H van Schuppen, Chenghui Zhang

摘要:

我们研究电力系统中的扰动引起的波动。在电力系统的线性化系统中,扰动用布朗运动过程来描述,波动用相关随机过程在不变概率分布下的协方差矩阵来描述。我们推导出显式公式的协方差矩阵的系统具有一致的阻尼惯性比。通过对完全图和星形图中频率方差的研究发现,受扰动影响的节点处频率方差明显大于其他节点处频率方差之和,说明扰动对节点的影响最大。此外,它表明,添加新的节点通常并不有助于减少在扰动的源节点的变化。最后,通过显式公式表明,线路容量影响频率的变化,惯性影响相位差的方差。

英文摘要:

We look into the fluctuations caused by disturbances in power systems. In the linearized system of the power systems, the disturbance is modeled by a Brownian motion process, and the fluctuations are described by the covariance matrix of the associated stochastic process at the invariant probability distribution. We derive explicit formulas for the covariance matrix for the system with a uniform damping-inertia ratio. The variance of the frequency at the node with the disturbance is significantly bigger than the sum of those at all the other nodes, indicating the disturbance effects the node most, according to research on the variances in complete graphs and star graphs. Additionally, it is shown that adding new nodes typically does not aid in reducing the variations at the disturbance's source node. Finally, it is shown by the explicit formulas that the line capacity affect the variation of the frequency and the inertia affects the variance of the phase differences.

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。

↑