电力系统保护与控制2024，Vol.52Issue(10)：54-63,10.DOI:10.19783/j.cnki.pspc.231527
送端交流系统故障引发逆变侧换相失败机理分析及抑制策略
Mechanism analysis and prevention strategy of inverter side commutation failure caused by the sending end AC system
摘要
Abstract
There is a problem of commutation failure(CF)at the inverter side caused by sending end AC system faults.First,based on the mechanism of reactive power interaction in AC-DC systems and the expression of extinction angle,the operational characteristics at the inverter side are analyzed in depth,and the variation laws of DC current rise speed and amplitude under different fault severity are clarified.It is concluded that the excessive amplitude of DC current in a slight fault and the excessive rise speed of DC current in a severe fault are the main reasons leading to CF.Secondly,the reactive power consumed by the rectifier order value with different fault severity is quantitatively calculated,the expression of DC current and voltage and the reactive power consumed by the rectifier is proposed.A CF prevention strategy based on rectifier reactive power control is proposed.Finally,the simulation results based on PSCAD/EMTDC verify the correctness of the mechanism and the effectiveness of the proposed prevention strategy.关键词
送端交流系统/换相失败/故障严重程度/直流电流/无功控制Key words
sending end AC system/commutation failure(CF)/fault severity/DC current/reactive power control引用本文复制引用
史映萍,尹纯亚,李凤婷,韩璐,刘江山,张雨乐..送端交流系统故障引发逆变侧换相失败机理分析及抑制策略[J].电力系统保护与控制,2024,52(10):54-63,10.基金项目
This work is supported by the National Natural Science Foundation of China(No.5236070148). 国家自然科学基金项目资助(5236070148) （No.5236070148）
新疆维吾尔自治区教育厅项目资助(XJEDU2022P019) （XJEDU2022P019）
