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在我国通信网络的综合屏蔽能力较以前有了大幅度提高的情况下,研究了取消直流滤波器对±800 kV直流输电系统谐波水平的影响。以已经投运的向家坝—上海和锦屏—苏南±800 kV特高压直流输电工程为例,重点研究了取消直流滤波器对±800 kV特高压直流输电系统等效干扰电流、直流侧谐振以及换流站设备中谐波水平的影响。研究结果对后续的±800 kV特高压直流输电工程直流滤波器设计具有一定的参考作用。
Under the circumstance that the comprehensive shielding ability of communication network in our country has been greatly improved, the influence of eliminating DC filter on the harmonic level of ± 800 kV HVDC transmission system has been studied. Taking the Xiangjiaba - Shanghai and Jinping - Sunan ± 800 kV UHVDC transmission project already put into operation as an example, this paper focuses on the study of canceling the equivalent interference current of ± 800 kV UHVDC transmission system with DC filter, the DC side Resonance and harmonic levels in converter station equipment. The results of this study have certain reference value for the design of DC filter of ± 800 kV UHVDC transmission project.