摘要
为了防止空载变压器励磁效应造成的励磁涌流影响高压直流输电系统(HVDC)性能。论文在分析变压器励磁涌流模型的基础上,利用无功功率补偿器(RPC)装置改变系统并联谐振频率以及与HVDC运维条件相关联的阻抗,并提出了谐波谐振量化的“电压畸变指数”,该方法能够快速评估变压器励磁引起的电压畸变的严重程度,并且能够以最小影响系统运行的方式得到最优解。实现了系统并联谐振频率发生偏移,从而避免变压器励磁涌流的谐振效应,保证了系统运维的可靠性。仿真结果证明了该方法可用于降低变压器励磁涌流对HVDC系统运行的影响。
In order to prevent inrush current caused by no-load transformer excitation effect from affecting the performance of HVDC system,based on the analysis of transformer inrush current model,this paper uses reactive power compensator(RPC)device to change the parallel resonance frequency of the system and the impedance associated with HVDC operation and maintenance conditions,and puts forward the"voltage distortion index"of harmonic resonance quantification.This method can quickly assess the severity of voltage distortion caused by transformer excitation,and can minimize the impact on system operation.The optimal solution is obtained by the way of rows.The parallel resonance frequency of the system is offset to avoid the resonance effect of transformer inrush current and ensure the reliability of system operation and maintenance.The simulation results show that this method can be used to reduce the influence of transformer inrush current on HVDC system operation.
作者
王鑫
宋广磊
李昱萱
WANG Xin;SONG Guanglei;LI Yuxuan(State Grid Xinjiang Information and Communication Company,Urumqi 830000)
出处
《计算机与数字工程》
2020年第10期2533-2538,共6页
Computer & Digital Engineering
关键词
变压器励磁涌流
HVDC运维
并联谐振
无功补偿
谐波分析
电压畸变
transformer inrush current
HVDC operation and maintenance
parallel resonance
reactive power compensation
harmonic analysis
voltage distortion
