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1.湖南大学电气与信息工程学院,湖南省长沙市 410082
2.云南电网有限责任公司电网规划建设研究中心,云南省昆明市 650011
黄明增(1996—),男,硕士研究生,主要研究方向:低惯量电力系统稳定性智能化评估与控制。E-mail:hmingzeng4786@163.com
胡雅涵(1998—),女,硕士研究生,主要研究方向:电力系统稳定性智能化评估方法。
文云峰(1986—),男,通信作者,副教授,博士生导师,主要研究方向:低惯量电力系统规划、运行与控制。E-mail:yunfeng.8681@163.com
收稿日期:2020-08-12,
修回日期:2020-12-14,
网络出版日期:2021-01-30,
纸质出版日期:2021-04-25
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黄明增,胡雅涵,文云峰等.融合JMIM和NGBoost的电力系统暂态稳定评估方法[J].电力系统自动化,2021,45(8):155-165.
HUANG Mingzeng,HU Yahan,WEN Yunfeng,et al.Assessment Method of Transient Stability for Power System Based on Joint Mutual Information Maximization and Natural Gradient Boosting[J].Automation of Electric Power Systems,2021,45(8):155-165.
黄明增,胡雅涵,文云峰等.融合JMIM和NGBoost的电力系统暂态稳定评估方法[J].电力系统自动化,2021,45(8):155-165. DOI: 10.7500/AEPS20200812004.
HUANG Mingzeng,HU Yahan,WEN Yunfeng,et al.Assessment Method of Transient Stability for Power System Based on Joint Mutual Information Maximization and Natural Gradient Boosting[J].Automation of Electric Power Systems,2021,45(8):155-165. DOI: 10.7500/AEPS20200812004.
为实现电力系统暂态稳定在线快速评估和可信度评价,提出了一种融合联合互信息最大化(JMIM)和自然梯度提升(NGBoost)的暂态稳定评估方法。基于JMIM,采用联合互信息和“最大最小值”原则挖掘海量输入数据的相关性,从而筛选出电网关键运行特征,避免维度爆炸问题。为实现高可信度的暂态稳定评估,构建NGBoost驱动的暂态稳定评估模型,可以以函数形式对模型的条件概率分布参数进行预测,进而实现概率预测,并量化可信度。结合自适应可信度阈值修正方法,实现对系统受扰状态暂态稳定的时序评估。利用新英格兰10机39节点系统和中国某省级电网数据进行了算例测试。与其他机器学习方法相比,所提方法在噪声干扰下具有更好的鲁棒性,可更准确识别不稳定运行状态。
In order to realize the on-line rapid assessment and credibility evaluation of power system transient stability
a transient stability assessment method combining joint mutual information maximization (JMIM) and natural gradient boosting (NGBoost) is proposed. Based on JMIM
joint mutual information and “maximum of the minimum” principle are adopted to mine data correlation
so as to screen out the key characteristics of the power grid and avoid dimension explosion. To realize the transient stability assessment with high-confidence
a transient stability assessment model driven by NGBoost is constructed
which can predict parameters of the conditional probability distribution of the model in the form of a function to achieve probability prediction
thereby quantifying the credibility. Combined with the adaptive credibility threshold correction method
the time sequence assessment of system transient stability in disturbed states is realized.The case experiments are conducted on the data of New England 10-generator 39-bus system and a provincial power grid in China. Compared with other machine learning methods
the proposed method has better robustness under noise interference and can identify the unstable states more accurately.
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