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1.三峡大学电气与新能源学院,湖北省宜昌市 443002
2.湖北省输电线路工程技术研究中心(三峡大学),湖北省宜昌市 443002
Received:16 June 2024,
Revised:2025-03-04,
Published Online:21 March 2025,
Published:10 June 2025
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徐彬,刘任,唐波等.基于多误差特性融合的架空线路载流量概率预测[J].电力系统自动化,2025,49(11):199-207.
XU Bin,LIU Ren,TANG Bo,et al.Probabilistic Prediction of Overhead Line Ampacity Based on Multi-error Characteristic Fusion[J].Automation of Electric Power Systems,2025,49(11):199-207.
徐彬,刘任,唐波等.基于多误差特性融合的架空线路载流量概率预测[J].电力系统自动化,2025,49(11):199-207. DOI: 10.7500/AEPS20240616001.
XU Bin,LIU Ren,TANG Bo,et al.Probabilistic Prediction of Overhead Line Ampacity Based on Multi-error Characteristic Fusion[J].Automation of Electric Power Systems,2025,49(11):199-207. DOI: 10.7500/AEPS20240616001.
准确预测架空线路的载流量是实现线路动态增容的基础。常规的单一点预测模型难以有效捕捉风速、环境温度等载流量气象因子的波动性与随机性,且载流量预测误差具有时变相关性和条件分布特性。文中以串行集成学习Bagging为总架构,整合并行集成学习算法AdaBoost、XGBoost和LightGBM构建载流量点预测模型,旨在克服单一模型泛化能力不足的局限,提升预测准确性与稳定性;基于实测数据论证了载流量预测误差的时变相关性和条件分布特性,继而引入Sklar定理及其动态Copula函数构建载流量预测误差的条件分布模型;将点预测模型与条件分布模型相结合,提出一种基于串并行集成学习与多误差特性融合的架空线路载流量概率预测方法。与传统方法相比,所提方法的保守性指标降低了28.69%。
Accurate prediction of overhead line ampacity serves as the foundation for achieving dynamic line rating. Conventional single-point prediction models face challenges in effectively capturing the volatility and randomness of meteorological factors influencing ampacity (e.g.
wind speed and ambient temperature)
while ampacity prediction errors exhibit characteristics of time-varying correlations and conditional distribution. To address these limitations
this paper proposes a novel framework employing serial ensemble learning-based Bagging integrated with parallel ensemble learning methods (AdaBoost
XGBoost
and LightGBM) to develop an ampacity point prediction model. This hybrid approach overcomes the constraint of limited generalization capability of single model while enhancing prediction accuracy and stability. Through analysis of measured data
this paper demonstrates the time-varying correlations and conditional distribution characteristics in ampacity prediction errors. Subsequently
this paper introduces Sklar's theorem and dynamic Copula functions to establish a conditional distribution model for ampacity prediction errors. By integrating the proposed point prediction model with the conditional distribution model
this paper develops a probabilistic ampacity prediction method that integrates serial-parallel ensemble learning and multi-error characteristic fusion. Compared with traditional methods
the conservativeness indicator of the proposed method is reduced by 28.69%.
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