Canberra export Angela Ballard will become Australia's most experienced female para-athlete at the world championships in London on Friday.

Ballard first competed as a budding 16-year-old at the 1998 world championships and almost two decades later the sprinter is still wearing green and gold.

Ballard said the sport has changed dramatically since her first dash for Australian as a teenager, but the 35-year-old emphasised her hunger to compete for Australia remains just as fierce.

"The sport has progressed so much. The professionalism that the Australian team brings is impressive, the way we approach international competition has completely changed," Ballard said.

"The passion was always there but the methods behind it make it easier to be an athlete nowadays, focusing on performance."

The Rio Olympics dual bronze medallist has been a paraplegic since a car accident when she was seven and arrives in London as the reigning 200m and 400m world champion.

"My aspirations since Rio have changed a little bit. I've adjusted my program and some of those things are settling in," Ballard said.

"I'm confident with where I'm at but with change you never really know how things are going to go, so I just want to get out there, put down some good performances and hopefully the results come."

Rio paralympic champion and fellow Canberran Scott Reardon will compete in the 100m, while thrower Russell Short will become Australia's most experienced para-athlete.