Power transmission apparatus and power generation system having same

A power transmission apparatus for transmitting power generated by a power generation apparatus to a generator, the power transmission apparatus comprising:

• a first disk part connected to a shaft of the generator, the first disk part including a first coupling disk and a first disk shaft;
• a second disk part connected to a shaft of the power generation apparatus and disposed on a rear side of the first disk part, the second disk part including a second coupling disk and a second disk shaft;
• and
• a connection part configured to connect the first disk part and the second disk part and include a portion that decreases and then increases in diameter along a longitudinal direction,
• wherein the first disk shaft and the second disk shaft are disposed between the first coupling disk and the second coupling disk,
• wherein the first disk shaft is formed to protrude from a rotational center of the first coupling disk toward a rotational center of the second coupling disk and the second disk shaft is formed to protrude from the rotational center of the second coupling disk toward the rotational center of the first coupling disk.