怒江电网小水电机群低频振荡分析  

Analysis of Low Frequency Oscillation of Nujiang Hydro-power Generators

作　　者：宿瑞 李琰[1] 邓亚琪[1] 刘晓欣 胡靖 徐天奇[1] SU Rui;LI Yan;DENG Yaqi;LIU Xiaoxin;HU Jing;XU Tianqi(School of Electrical and Information Technology,Yunnan Minzu University,Kunming 650500,China;Nujiang Power Supply Bureau,Yunnan Power Grid Co.,Ltd.,Nujiang 673100,China)

机构地区：[1]云南民族大学电气信息工程学院,云南昆明650500 [2]云南电网有限责任公司怒江供电局,云南怒江673100

出　　处：《电工技术》2018年第1期48-50,53,共4页Electric Engineering

基　　金：国家自然科学基金项目(编号61461055);云南电网公司怒江供电局职工技术创新项目(编号050000kk52150006)

摘　　要：为了分析怒江电网集中、大量的小水电机组的低频振荡问题,以福贡县、贡山县地区小水电机群为研究对象,在2016年怒江电网丰水大负荷的运行方式基础上,利用BPA仿真平台建立了怒江电网小水电机群的详细模型,分析了怒江电网与大理电网之间的低频功率振荡特性,结果表明福贡、贡山地区小水电机群内部存在阻尼比接近3%的弱阻尼振荡模式,并模拟单相瞬时短路故障,分析了故障后低频振荡特性,最后探讨了使阻尼比恢复标准的相应措施。In order to analyze the low frequency oscillation of massive small hydro-power generators in Nujiang power grid,Fugong and Gongshan counties are taken as the research objects,based on the operation mode of the Nujiang power grid with peak load in abundant water period in 2016.A detailed model of the Nujiang of small hydro-power generators was built using the BPA,and the characteristics of low frequency oscillation between Nujiang and Dali power grid was analyzed.The results show that there is a weak oscillation mode with the damping ratio close to 3%among the small hydro-power generators in Fugong and Gongshan.A single-phase instantaneous fault is simulated to analyze low frequency oscillation characteristics.At last,the corresponding measures to recover standard damping ratio is discussed.

关 键 词：低频振荡 小水电机组 系统建模 阻尼比 单瞬短路故障 

分 类 号：TM711[电气工程—电力系统及自动化]