默蒂亚里-拉合尔工程低频振荡分析  

Analysis of low frequency oscillation in Matiari-Lahore project

作　　者：李艳梅 魏巍 肖龙 张艳浩 鲁庆华 LI Yanmei;WEI Wei;XIAO Long;ZHANG Yanhao;LU Qinghua(XJ Electric Co.,Ltd,Xuchang,He’nan 461000)

机构地区：[1]许继电气股份有限公司,河南许昌461000

出　　处：《电气技术》2023年第6期37-41,共5页Electrical Engineering

摘　　要：本文对默蒂亚里-拉合尔高压直流输电工程现场交流系统出现的0.6Hz低频振荡现象进行分析。通过交流等效网络模拟实际的交流系统振荡,对频率控制和双侧频差调制两种策略进行实时数字仿真和分析发现,当交流系统受到大扰动产生低频振荡时,频率控制功能不能起到很好的阻尼效果,系统振荡幅度越来越大;双侧频差调制可以产生一定正阻尼,进而抑制低频振荡,系统振荡幅度逐渐衰弱。因此,建议在工程中添加双侧频差调制用于抑制低频振荡。This article analyzes the 0.6Hz low frequency oscillation phenomenon in the on-site AC system of the Matiari-Lahore high voltage direct current(HVDC) project.The AC equivalent network is used to simulate the actual oscillation of AC system,and the two strategies of frequency control and bilateral frequency difference control are simulated and analyzed in real time digital simulation(RTDS).It is found that when the AC system is subjected to large disturbance and produces low frequency oscillation,the frequency limiting function can not play a good damping effect and the oscillation amplitude becomes larger and larger.Bilateral frequency difference modulation can produce a certain positive damping,then the low frequency oscillation is restrained,the oscillation amplitude gradually weakens.Therefore,adding bilateral frequency difference control to suppress low frequency oscillation in the project is suggested.

关 键 词：低频振荡 高压直流(HVDC)输电 抑制策略 实时数字仿真(RTDS) 

分 类 号：TM712[电气工程—电力系统及自动化]