电力系统自动化2025，Vol.49Issue(7)：135-147,13.DOI:10.7500/AEPS20240922001
考虑新能源发电切换控制特性的直流输送能力快速评估
Fast Transfer Capability Assessment for HVDC Considering Switching Control Characteristics of Renewable Energy Generation
摘要
Abstract
The large-scale renewable energy generation bases mainly utilize the HVDC to transfer renewable energy generation.Online assessment for transfer capability of HVDC is a key technology for monitoring the operation security of renewable energy generation bases.Hence,considering the switching control characteristics of renewable energy generation during the fault ride-through process,an assessment method for HVDC transfer capability based on stacked target-related denoising autoencoder is proposed.First,the relation equations of the simplified model of the renewable energy generation transmission system through HVDC are derived and analyzed.The reasons that the switching control of renewable energy generation can aggravate the transient overvoltage levels and more severely restrict HVDC transfer capability are clarified.And the mathematical model of HVDC transfer capability calculation is constructed.Then,based on the stacked target-related denoising autoencoder,the assessment model of the maximum HVDC transfer capability is constructed.A switching weight selection mechanism is introduced to select the weight vector of the assessment model according to the sequential switching states of control modes,effectively taking into account the impact of switching control on HVDC transfer capability.Finally,an incremental updating method for the assessment model based on the orthogonal weight modification is proposed.The model weights are updated in the orthogonal direction of the previous sample feature space,which can decrease the adverse effect of catastrophic forgetting problem.Simulation results demonstrate that the proposed method can effectively adapt to the switching control characteristics of renewable energy generation,and achieve the fast and accurate assessment for the maximum HVDC transfer capability.关键词
新能源发电/直流输送能力/切换控制/机器学习/增量更新Key words
renewable energy generation/HVDC transfer capability/switching control/machine learning/incremental updating引用本文复制引用
闫炯程,刘天浩,刘玉田,杜正春..考虑新能源发电切换控制特性的直流输送能力快速评估[J].电力系统自动化,2025,49(7):135-147,13.基金项目
国家重点研发计划资助项目(2022YFB2402700) （2022YFB2402700）
国家电网公司科技项目(52272222001J). This work is supported by National Key R&D Program of China(No.2022YFB2402700)and State Grid Corporation of China(No.52272222001J). （52272222001J）
