In this paper

the influence of bench design on DC voltage distribution is studied on the basis of bench structure of DC filter capacitor for HVDC

the relationship among the number of series segments

leakage ratio and DC voltage non-uniform coefficient of capacitor shell connection elements is studied

and the conclusion that the more the number of series segments of the elements

the more the non-uniform of the DC voltage distribution is concluded; In combination with the characteristics of the capacitor unit

it is concluded that the electric time constant of the capacitor is only a constant which is only related to ρε and

on the basis of above conclusion

the reasons for the unsatisfactory operation of the large-capacity DC capacitor bank are analyzed

and the design recommendations for DC filter capacitor banks are given.