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1.北京交通大学电气工程学院,北京市 100044
2.中国电力科学研究院有限公司,北京市 100192
张沛(1972—),男,博士,教授,博士生导师,主要研究方向:电力系统调度运行、电力系统规划和新能源预测与消纳。E-mail:peizhang166@qq.com
周钰朋(1998—),男,通信作者,硕士研究生,主要研究方向:人工智能技术在电力系统稳定性分析的应用。E-mail:1063076064@qq.com
崔晖(1982—),男,硕士,高级工程师,主要研究方向:电力系统自动化、电网调度、电力市场。E-mail:cuih@epri.sgcc.com.cn
收稿:2022-12-15,
修回:2023-04-02,
网络出版:2023-07-15,
纸质出版:2023-08-10
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张沛,周钰朋,崔晖等.基于可解释机制的极限传输能力计算知识表达模型[J].电力系统自动化,2023,47(15):179-187.
ZHANG Pei,ZHOU Yupeng,CUI Hui,et al.Interpretable Mechanism Based Knowledge Expression Model for Total Transfer Capability Computation[J].Automation of Electric Power Systems,2023,47(15):179-187.
张沛,周钰朋,崔晖等.基于可解释机制的极限传输能力计算知识表达模型[J].电力系统自动化,2023,47(15):179-187. DOI: 10.7500/AEPS20221215002.
ZHANG Pei,ZHOU Yupeng,CUI Hui,et al.Interpretable Mechanism Based Knowledge Expression Model for Total Transfer Capability Computation[J].Automation of Electric Power Systems,2023,47(15):179-187. DOI: 10.7500/AEPS20221215002.
极限传输能力(TTC)受到运行点、潮流调整方式、极限边界的综合影响,故计算呈现多因素影响下的高维状态空间复杂性,传统方法难以在复杂环境中建模并快速计算。文中将TTC计算看作人工智能模型的知识学习问题,提出了一种基于可解释机制的TTC计算知识表达模型。首先,从安全域角度分析TTC影响因素。其次,构造由初始运行点、潮流调整方式、极限状态组成的样本集,训练XGBoost模型完成计算,并提取影响模型建立的关键特征作为全局知识。然后,引入沙普利加和解释机制完善单一状态下的结果分析和计算结果的可信度。最后,以IEEE 9节点系统和WECC 240节点系统进行算例验证,对比其他模型,所提方法具有较好的计算效果和一定的可信度。
Total transfer capability (TTC) is comprehensively affected by the operation point
power flow adjustment mode and limit boundary. Therefore
the computation presents high-dimensional state space complexity under the influence of multiple factors. Traditional methods are difficult to model and rapidly compute in complex environments. This paper regards TTC computation as a knowledge learning problem of the artificial intelligence model. The TTC computation knowledge expression model is proposed based on interpretable mechanism. Firstly
the influencing factors of TTC are analyzed from the perspective of security region. Secondly
an sample set consisting of the initial operation points
power flow adjustment mode and limit state is constructed. XGBoost model is trained to computate. And key features which affect the model building are extracted as global knowledge. After that
Shapley additive explanation mechanism is introduced to improve the analysis of results in a single state and the trust worthiness of the computation results. Finally
the IEEE 9-bus system and WECC 240-bus system are used for case verification. Compared with other models
the proposed method has a better computation results and a certain trustworthiness.
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