摘要
作为电力系统中的特殊用户之一,电气化铁路具有非线性、不对称和波动性强的特点,其接入会对电力系统造成不利影响。文章将理论研究与实际数据相结合,在PSCAD/EMTDC平台上搭建220 kV电网和牵引变电站的综合模型,进而得出了牵引变电站引起的谐波畸变率与三相不平衡度在电网中的分布情况。在此基础上,主要考虑了谐波与负序对电力线路与变压器损耗的影响,得出牵引变电站带来的谐波和负序对地区电网附加损耗的量化计算结果。
As one of the special user of electric power system, electric railway has the characteristic of nonlinear, asymmetry and strong volatility, its access would adversely affect the power system. This paper combines theoret- ical research and practical data to build integrated model of 220 kV power system and traction substation on the platform of PSCAD/EMTDC, then it obtains the distribution of the harmonic distortion and three-phase unbal- anced distribution degree caused by traction substation in electric network. On this basis, it mainly considers the influence of harmonic and negative sequence on power lines and transformer loss, gets quantified calculation re- sults of the additional loss caused by harmonic and negative sequence from the traction station to regional power grid.
出处
《华北电力技术》
CAS
2014年第3期54-58,63,共6页
North China Electric Power
关键词
牵引负荷
谐波
负序电流
附加损耗
traction load
harmonic
negative sequence current
additional loss
作者简介
娄竞（1980-），女，硕士，高级工程师，研究方向为电力系统分析与控制。
