摘要
推导及分析了交流输电线路与VSC-HVDC平行架设系统基频电磁感应边界条件。通过换流器开关函数及调制理论,得出电压源型换流器直流侧基频等值电路阻抗(导纳)矩阵。该等值电路阻抗矩阵可用于与分布式传输线二端口传递函数方程联立求解,从而对直流线路感应电压、电流大小进行频域参数分析。通过PSCAD/EMTDC电磁暂态软件仿真,得出只计及换流器开关函数基频成分的换流器直流侧基频等值电路,对于分析交直流平行架设系统基频感应电压、电流传递是准确有效的,从而验证了该等值电路的正确性与该方法的可行性。
In this paper the fundamental frequency electromagnetic induction boundary conditions of voltage souuce converterl（VSC）-HVDC transmission system with neighboring AC transmission lines are deduced and analyzed.Based on the converter switching function and modulation theory,the fundamental frequency equivalent circuit of converter from DC side point of view is obtained.The admittance matrix of deduced equivalent circuit can be combined with frequency dependent distributed transmission line two-port functions.This method can be used to calculate the induced fundamental frequency voltage and current,and then conduct the parametric analysis.The electromagnetic transient simulation PSCAD/EMTDC also proves that the deduced boundary conditions,which are only considering the fundamental component of VSC-HVDC converter,can be used to to analyze the electromagnetic induction between AC/DC transmission lines in the same right of way or in the same tower.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第5期183-189,共7页
Transactions of China Electrotechnical Society
