Probabilistic analysis of small signal stability of microgrid using point estimate method
Probabilistic analysis of small signal stability of microgrid using point estimate method
复制标题
DOI：
10.1109/supergen.2009.5348227
复制
发表时间：
2009-04
期刊：
影响因子：
--
通讯作者：
Xialing Xu;Tao Lin;X. Zha
中科院分区：
文献类型：
--
作者：
Xialing Xu;Tao Lin;X. Zha
提出了一种基于两点估计的微网小干扰稳定概率分析方法。不确定性可能来自不同的来源，如负荷需求或发电机组停运。该方法结合了TPE方法和概率小干扰稳定性分析。研究了微网概率小干扰稳定的稳定性指标和不稳定类型的判断。对于具有N个不确定参数的系统，TPE方法使用2N次稳定性计算来量化不确定性，同时保持足够的精度，而不是使用Monte Carlo方法所需的大量模拟。微电网的小信号模型，其中包括一个传统的同步机和两个电子接口的分布式发电，被用来评估所提出的方法的性能。最后通过对MG的仿真验证了该方法的有效性。
This paper presents a two-point estimate (TPE) based method for probabilistic analysis of small signal stability of a microgrid (MG) considering uncertainties. The uncertainties may arise from different sources as load demand or generation unit outages. This method combines the TPE method and probabilistic small signal stability analysis. Stability indices and the judgment of unstable types for microgrid's probabilistic small signal stability are also addressed. Instead of using a large number of simulations, which is required in Monte Carlo approach, for a system with N uncertain parameters, the TPE method uses 2N calculations of stability to quantify the uncertainty while keeping enough precision. The small signal model of a microgrid, which consists of a conventional synchronous machine and two electronically interfaced distributed generations, is used to evaluate the performance of the proposed method. Simulation results of the MG verify the effectiveness of the proposed method.