±800 kV特高压直流输电工程直流滤波器设计研究

Design and Study on Filter in ±800 kV Ultra High Voltage Direct Current Transmission Project

介绍了直流输电工程采用的直流滤波器的类型与构成,分析了±800 kV特高压直流输电工程换流器在直流侧产生的谐波的特点,并与±500 kV高压直流输电工程做了比较。以实际的±800 kV特高压直流输电工程为例,对换流器在直流线路上产生的等效谐波干扰电流进行了计算,对不同直流滤波器设置方案下的滤波效果进行了比较,并以计算结果为依据提出了较为合理的±800 kV特高压直流输电工程直流滤波器设置方案,为最终确定实际工程直流滤波器方案具有一定的参考作用。

This paper introduced DC filter used in high voltage direct current （HVDC） transmission project, analyzed harmonious characteristic on DC side produced by ±800 kV ultra high voltage direct current converter, and compared with that of ±500 kV HVDC project. Equivalent harmonious interfere current on DC transmission line, which produced by converter, was calculated by taking a practical example of UHVDC. The effects were compared as setting projects of filter were different. According to the calculated results, an appropriate setting project of UHVDC filter was presented as reference.