电力系统自动化2025，Vol.49Issue(7)：148-157,10.DOI:10.7500/AEPS20240407010
响应驱动的直流送端暂态过电压评估及抑制策略
Response-driven Assessment and Suppression Strategy for Transient Overvoltage at DC Sending End
摘要
Abstract
For high-voltage direct current transmission systems with large-scale renewable energy,commutation failures may cause transient overvoltage problems at the sending end,leading to the disconnection risk of renewable energy.To ensure the safe and stable operation of the DC sending system under commutation failures,a response-driven assessment and suppression strategy for transient overvoltage is proposed.Firstly,integrating the squeeze-and-excitation(SE)module and the LeNet network,the overvoltage amplitude prediction model is established to explore the mapping relationship between the overvoltage level and key response features under normal operation conditions of the power grid.Secondly,the impact of the connection capacity of the condenser on AC bus voltage at the sending end is analyzed,and a simplified selection principle of condenser capacity is proposed based on overvoltage prediction results,preliminarily determining the number of condensers.Finally,dynamic reactive power characteristics of condensers during the commutation failure are analyzed,and an excitation control optimization strategy based on trigger angle is designed to weaken the anti-modulation effect and further suppress the transient overvoltage.The simulation results verify the accuracy of the proposed overvoltage assessment method and the effectiveness of the suppression strategy for a DC transmission system with a transient overvoltage problem.关键词
暂态过电压/高压直流输电/换相失败/响应驱动/评估/调相机Key words
transient overvoltage/high-voltage direct current/commutation failure/response-driven/assessment/condenser引用本文复制引用
秦博宇,张哲,高鑫,丁涛,张逸兴..响应驱动的直流送端暂态过电压评估及抑制策略[J].电力系统自动化,2025,49(7):148-157,10.基金项目
国家重点研发计划资助项目(2021YFB2400800). This work is supported by National Key R&D Program of China(No.2021YFB2400800). （2021YFB2400800）
