Designing and simulating for research of filtering of direct current transmission system based on novel converter transformer

The characteristic to shield harmonics of the novel converter transformers is presented in this paper. Then design the DC transmission system of the novel transformer to achieve harmonics shielding function, by adopting the novel transformer on the rectifier side. Based on the calculation method of harmonic content in the HVDC system, calculate and allocate the reactive power compensation on both the rectifier side and inverter side on the experiment platform, according to which a variety of filters parameters are designed. Final, simulation to DC transmission system is carried on, and the result indicates that the harmonics shielding function can be achieved using the novel converter transformers, which has certain value in use in the engineering.