电网技术2026，Vol.50Issue(1)：中插160,365-372,中插161,10.DOI:10.13335/j.1000-3673.pst.2024.1858
基于负序电压补偿的混合潮流控制器不对称故障穿越策略
Asymmetric Fault Crossing Strategy of Hybrid Power Flow Controller Based on Negative Sequence Voltage Compensation
摘要
Abstract
A hybrid power flow controller based on a cascaded H-bridge("hybrid power flow controller")is a flexible AC transmission system technology that has good effects in adjusting grid power flow and improving transmission line carrying capacity.To avoid line protection rejection when asymmetric faults occur,which affects the stable and safe operation of the converter,this paper proposes an asymmetric fault crossing strategy of the hybrid power flow controller based on negative sequence voltage compensation.The scheme uses the cascaded H-bridge converter as a controlled voltage source to provide a negative sequence voltage compensation with controllable amplitude and phase angle on the phase shift transition equivalent negative sequence impedance,achieving fault crossing of the hybrid power flow controller.The negative sequence component of the measured current is used as the basis of asymmetric fault identification.The PST gear is quickly zeroed and switched simultaneously.The negative sequence current is controlled by measuring the negative sequence current to control the converter output negative sequence voltage for compensation.The measured negative sequence voltage and current are used to calculate the measured impedance,and the distance protection of the connected line operates normally after the hybrid power flow controller is connected.Finally,a simulation model of the hybrid power flow controller connected to the line is built on the PSCAD/EMTDC platform,and a large number of simulation experiments are carried out to verify the feasibility and effectiveness of the proposed scheme.关键词
混合潮流控制器/距离保护/故障穿越/负序电压补偿Key words
hybrid power flow controller/distance protection/fault cross/negative sequence voltage compensation分类
信息技术与安全科学引用本文复制引用
郑涛,丁硕..基于负序电压补偿的混合潮流控制器不对称故障穿越策略[J].电网技术,2026,50(1):中插160,365-372,中插161,10.基金项目
国家自然科学基金联合基金项目(U2166205).Project Supported by Joint Fund of National Natural Science Foundation of China(No.U2166205). （U2166205）
