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1.东南大学电气工程学院,江苏省南京市 210096
2.国网江苏省电力有限公司电力科学研究院,江苏省南京市 210036
3.国网江苏省电力有限公司淮安供电分公司,江苏省淮安市 223000
Received:16 May 2023,
Revised:2023-09-08,
Published Online:09 November 2023,
Published:25 March 2025
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齐宗强,窦晓波,卜强生等.基于样本弱依赖多项式混沌展开式的电网小干扰概率分析[J].电力系统自动化,2025,49(6):157-164.
QI Zongqiang,DOU Xiaobo,BU Qiangsheng,et al.Small-signal Probabilistic Analysis for Power Grids Based on Low-sample-dependent Polynomial Chaos Expansion[J].Automation of Electric Power Systems,2025,49(6):157-164.
齐宗强,窦晓波,卜强生等.基于样本弱依赖多项式混沌展开式的电网小干扰概率分析[J].电力系统自动化,2025,49(6):157-164. DOI: 10.7500/AEPS20230516007.
QI Zongqiang,DOU Xiaobo,BU Qiangsheng,et al.Small-signal Probabilistic Analysis for Power Grids Based on Low-sample-dependent Polynomial Chaos Expansion[J].Automation of Electric Power Systems,2025,49(6):157-164. DOI: 10.7500/AEPS20230516007.
随着光伏等新能源高渗透接入,电网的随机性逐步增强,对其进行概率分析是必不可少的。多项式混沌展开式等方法能够获取精确的概率分析结果,但其样本需求量和计算成本随着随机变量数的增长呈指数增长。针对该问题,提出了一种基于样本弱依赖多项式混沌展开式的电网小干扰概率分析方法。该方法在少量仿真样本的基础上构建张量补全模型,采用基于改进生成对抗网络的张量补全算法提取已有样本分布特征并扩张样本数量,从而降低多项式混沌展开式对样本数量的依赖性。通过仿真验证了所提方法的有效性,结果表明,该方法在保证分析结果准确性的基础上,大幅减少了所需样本数目。
With the high penetration rate of photovoltaics and other new energy resources
probabilistic analysis is essential due to the gradually increasing randomness of power grids. The methods such as polynomial chaos expansion can obtain the accurate results of probabilistic analysis
but the sample demand and the calculation cost increase exponentially with the increasing number of random variables. To solve this problem
a small-signal probabilistic analysis method for power grids based on low-sample-dependent polynomial chaos expansion is proposed. This method constructs a small number of simulation samples based on the tensor completion model
and the tensor completion algorithm based on improved generative adversarial network is used to extract the distribution characteristics of existing samples and expand the number of samples
so as to reduce the dependence of polynomial chaos expansion on the number of samples. The effectiveness of the proposed method is verified by simulation. The results show that the number of samples can be greatly reduced while ensuring the accuracy of analysis results with the proposed method.
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