I received a few invitations to conferences on physics. In Australia, in Japan, in France, and others. I am finishing graduate school. But how can I take part in these conferences, if I need 1,000 Euros for participation in Sweden and I also need to get there? Are there are funds to promote?
Ask your advisor, who's likely to know more than anyone here. It's possible that the university/department allocates some funding for graduate students to attend conferences, in which case you would qualify. It's possible that the professor has a grant that provides such a component, and he's willing to fund you. Finally, it's possible that the conference itself provides some funds for people who need travel support.
You will need to look to know the answer.