Gravitational powers between the moon, the sun, and the earth deliver tides in the ocean. the moon applies more than twice as extraordinary power on the tides as the sun because of its significantly nearer position to the earth. Therefore, the tides nearly take after the moon amid its turn around the earth, making stream and ebb of tides. The occasional ascent and fall of the water level of the ocean are called tide. At the point when the water is over the mean ocean level, it is called surge tide and when the level is underneath the mean ocean level, it is called ebb tide.
Tidal age utilizes the energy of moving water to turn a generator and may deliver control of water moving two way: internal on the surging tide and outward on the ebb tide. To use energy, water must be caught at high tide behind a dum or blast and afterward made to drive the turbine as it comes back to the ocean amid low tide. A dam is worked at the mouth of the ocean. A tidal bowl is framed which gets isolated from the ocean by the dam. The bowl is utilized to saddle tidal energy by utilizing the potential energy of tides to drive the turbine.
Tidal energy is extraordinary compared to other accessible sustainable power sources. Rather than other clean sources, tidal energy can be anticipated for quite a long time. It is a spotless wellspring of energy and of inexhaustible nature. It is expensive in contrast with fossil energizes because of complex ordinary tidal power establishment which incorporates enormous dams in a vast sea. In India potential zones for the age of tidal energy is Gulf of Cambay, Gulf of Kutch and Sunderbans in West Bengal. Asia first tidal power plant of 250 MW limit is proposed to be set up at Kandla in the Gulf of catch.