Wave power generation system and method for controlling same

A wave power generation system comprising:

• a movable object that moves by waves while floating on the waves;
• a motion transmission unit comprising tension transmission members that are connected to at least three portions of the movable object to enable a six degrees-of-freedom motion of the movable object and that are configured to transmit kinetic energy of the movable object in one direction;
• a converting body connected to the tension transmission members;
• a hydraulic motor disposed on one side of the converting body;
• and
• a power generation unit disposed on another side of the converting body,
• wherein when the tension transmission members are pulled, the hydraulic motor rotates in one direction and allows a fluid to flow from a tank to a pressure accumulator, and
• wherein when the tension transmission members are not pulled, a fluid flows from the pressure accumulator to the tank, so that the hydraulic motor rotates in an opposite direction and a tension of the tension transmission members connected to the converting body is maintained.

A method of controlling a wave power generation system, the method comprising:

• storing a fluid flowing from a tank to a pressure accumulator in response to a hydraulic motor rotating in one direction, when a tension is applied to a tension transmission member by a six degrees-of-freedom motion of a movable object floating on waves;
• maintaining the tension of the tension transmission member in response to the hydraulic motor moving in an opposite direction based on movement of the fluid from the pressure accumulator to the tank, when the tension is not applied in the tension transmission member;
• and
• alternately generating electric energy by the tension applied to the tension transmission member by a motion of the movable object, and by the tension applied to the tension transmission member by the hydraulic motor.