摘要
建立精确的高压并联电抗器非线性模型是对超(特)交流输电系统进行各种仿真分析的基础。基于单相并联电抗器的电磁关系,充分考虑铁心非线性的影响,提出了一种适用于谐波分析、易于仿真实现的单相并联电抗器的非线性模型,它由反映其磁化特性的非线性电感与反映其铁心损耗的非线性电阻并联再与漏阻抗串联组成,并且分别引入ir-u和i1-u瞬时特性曲线来求解非线性电感和非线性电阻。结合我国晋东南-南阳-荆门1 000 kV特高压交流输电试验示范工程中的高抗参数在PSCAD/EMTDC中进行了建模和仿真,证明所建立的模型能够比较准确地反映高抗的非线性特性,为进行超(特)高压交流输电系统仿真模型的搭建和对其进行谐波特性分析提供了必要条件。
Modeling of accurate nonlinear high voltage（HV） shunt reactor is basis of simulation analysis of EHV（UHV） AC transmission system.Based on the electromagnetic relations of single-phase shunt reactor and the effect of iron core nonlinearity,a new model of single-phase shunt reactor is presented for harmonic analysis and computer simulation.The shunt reactor is composed by a simple equivalent circuit consisting of an impedance representing the leakage flux losses in series with a parallel combination of a nonlinear inductance（accounting for the saturation of the iron core） and a nonlinear resistance（accounting for the iron loss）.The nonlinear impedance is calculated by the ir-u and i1-u curves which have been used for modeling of transformer excitation impedance.The results of simulation in PSCAD/EMTDC using the parameters of shunt reactor in China＇s UHV AC Pilot Project have proved that this model accurately reflects the nonlinear characteristics of shunt reactor,which is the prerequisite to complete the simulating model of EHV（UHV） AC transmission system and analyze the harmonic characteristic of the system.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2011年第1期39-45,共7页
Proceedings of the CSU-EPSA
基金
国家电网公司特高压输电可行性研究项目(SGTGY[2008]609)
高等学校学科创新引智计划("111"计划)(B08013)
关键词
高压并联电抗器
非线性模型
特高压
仿真
high voltage（HV） shunt reactor
nonlinear model
ultra high voltage
simulation
