摘要
根据三沪Ⅱ回±500kV同塔双回直流主回路参数和华东地区典型500kV交流线路数据,采用EMTDC程序建立了交/直流输电系统的仿真模型。研究了交直流线路平行架设条件下,直流线路极导线布置和直流系统运行工况对交直流平行架设的影响,并给出了换流变阀侧直流偏磁电流的计算结果。对交/直流线路的平行长度,它们之间的接近距离以及抑制换流变压器阀侧直流偏磁电流的措施提出了建议。
According to the main circuit parameters of ±500 kV HVDC project from Three Gorges to Shanghai Ⅱ and the typical data of 500 kV AC transmission line in east of China, the model for simulation of AC/HVDC transmission lines is built by electro-magnetic transient in DC System（EMTDC）program. T he effects of different conductor disposal schemes of DC lines and different HVDC operation modes on parallel AC/DC transmission lines are researched. The DC bias current at valve side of converter transformer is researched,and the corresponding calculation results are given. S everal suggestions on the parallel length between AC and HVDC lines, t heir adjacent distance and the measure to suppress the DC bias current at valve side of converter transformer are put forward.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第19期70-75,共6页
Power System Protection and Control
关键词
平行架设交/直流线路
同塔双回直流
直流偏磁电流
直流系统电磁暂态
AC transmission line parallelly erected with DC transmission lines
double circuit HVDC
DC bias current
electro-magnetic transient in DC system
