In recent years

frequent tripping of AC filter has happened at several UHV converter stationsdue to the activity of birds and this has become into the primary factor of AC filter tripping. The bird dam-age can not only affect the safety and stability of AC filter equipment

but also cause DC system power lossin severe cases and even lead to DC system blocking. In this paper

the actual example is taken to analyzeand summarize deeply from such aspects as the consequence of bird damage

structures of different capaci-tor towers

the insulation measures of capacitor towers as well as applications of various anti-bird devices soto provide actual and operational reference for anti-bird of UHVDC converter station capacitors.