Finaly found the solution on http://www.oooforum.org/forum/viewtopic.phtml?t=70949
try:
# filter data
fdata = []
fdata1 = PropertyValue()
fdata1.Name = "UseTaggedPDF"
fdata1.Value = True
fdata.append(fdata1)
fdata.append(fdata1)
args = []
arg1 = PropertyValue()
arg1.Name = "FilterName"
arg1.Value = "writer_pdf_Export"
arg2 = PropertyValue()
arg2.Name = "FilterData"
arg2.Value = uno.Any("[]com.sun.star.beans.PropertyValue", tuple(fdata) )
args.append(arg1)
args.append(arg2)
document.storeToURL(outputUrl, tuple(args))
finally:
document.close(True)