Horizontal shaft tide turbine power generation device storing energy by means of flywheel

Abstract

A horizontal shaft tide turbine power generation device storing energy by means of a flywheel is characterized in that a turbine shaft is accelerated by means of a transmission, the flywheel is driven by an electromagnetic coupler to rotate, and the flywheel drives a generator to operate. When first starting is carried out, the flywheel needs to store energy, loads are disconnected by the generator at the moment, and the flywheel is continuously accelerated. When the flywheel reaches a designed rotating speed, the generator starts to generate electricity; when power of the turbine shaft is higher than power of the generator, the flywheel continues to store kinetic energy, and the rotating speed of the flywheel is increased; when the power of the turbine shaft is lower than the power of the generator, the flywheel releases the kinetic energy, and the rotating speed of the flywheel is decreased. When the tide speed is low, the turbine brakes and is disconnected with the flywheel, and the flywheel continues to drive the generator to operate by means of the stored kinetic energy. A turning device is adopted to maintain the obverse side of the turbine to always face towards a coming tide, and therefore the constant rotating direction of the turbine shaft is guaranteed. When a new tide circulation is started, the tide speed reaches to a starting speed, the flywheel can drive the turbine to be started through the electromagnetic coupler, and the problem that the turbine cannot be normally started is eliminated.

Description

technical field [0001] The invention relates to a horizontal-axis tidal current turbine power generation device using a flywheel for energy storage. Specifically, the power absorbed by the turbine is directly transmitted to the flywheel through a differential electromagnetic coupler. The flywheel and the generator work on the same axis and at the same speed. They are collectively referred to as flywheel generators. Since the speed of flywheel generators is more stable than that of direct drive generators, they can achieve a more stable power output. Background technique [0002] Tidal current energy is a clean and renewable energy that can be obtained through horizontal axis tidal current turbines, and its development is currently in the stage of commercial trial operation. The main factor hindering the commercialization of tidal current turbine power generation is that the tidal current energy changes periodically with the ebb and flow of the tide, making it difficult to pr...

AI Technical Summary

Problems solved by technology

The main factor hindering the commercialization of tidal current turbine power generation is that the tidal current energy changes periodically with the ebb and flow of the tide, making it difficult to provide stable power output

Using battery energy storage and inverter tuning is a solution to connect tidal current power generation to the grid. This solution is costly and consumes a lot

The use of mechanical energy storage, that is, flywheel energy storage, is an efficient energy storage method, but there are still problems, such as the friction loss between the flywheel and the air when the flywheel rotates at high speed, the differential transmission between the flywheel and the turbine shaft, etc.

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