I have a 93 miata that fist startwed blowing headlight fuses. now the car has no electrical power at all the battery is good but nothing in the car gets power. the batt connections are good. Any suggestions?

Give a check to the "main" fuse in the underhood fuse/relay box. Should be a 60 or 80 amp fuse in a 93 model

id check youre alternator or alternator belt.