A fluid power conversion system for electricity generation through a linear reciprocating motion of a device

The present invention relates to a fluid power conversion system for electricity generation through a linear reciprocating motion of a device in a fluid field. The fluid power conversion system comprises a reciprocating motion device and a fluid power conversion device. The reciprocating motion device includes a first linear shaft perpendicular to a hypothetical incident direction of the fluid field, and a first moving component capable of moving in a linear reciprocating motion manner on the first linear shaft. The fluid power conversion device includes a first wing connected to the first moving component. A fluid of the fluid field can generate a lift force to the first wing so as to drive linear reciprocating movement of the first moving component on the first linear shaft. The first wing does not need different cord lengths, and can remain the angle with respect to the hypothetical incident direction except at a returning point of the reciprocating motion when the lift force is being generated, thereby ma