Hybrid energy storage system based on superconducting magnet

Abstract

The invention provides a hybrid energy storage system based on a superconducting magnet, in the system, a heavy object on a slope top slide rail is connected by a rope and passes through a pulley, and then the rope is wound on a roller. And one end of the roller is connected to a shaft of the motor through a gear system. And the other end of the roller is connected to a flywheel connected with the gearbox through a gear system and then is connected with a generator. During charging, the motor drives the roller to rotate in the forward direction through operation of the power supply, the system can lift the weight to the maximum height through the rope at a constant speed to achieve the purpose of charging, and during power generation, due to the potential energy and the effect of the catapult, the weight can descend to drive the roller to rotate in the reverse direction, and the purpose of power generation is achieved. Meanwhile, a plurality of tracks can be laid to achieve continuity of charging and discharging. In addition, due to the access of the zinc-iron flow battery and the superconducting magnet, the electric energy quality is improved, and meanwhile, the adjusting capacity can be increased. After the system is connected to a new energy power grid, the system can overcome the defects of intermittency of wind energy and solar energy power generation and incapability of storing a large amount of power, and also can play a role in peak load shifting, so that the system is safer, more stable, more reliable and more environment-friendly, and renewable energy grid connection becomes more controllable.

Description

Technical field [0001] The present invention belongs to the field of energy storage technology, in particular to a hybrid energy storage system and a working method thereof. Background [0002] Nowadays, lithium-ion batteries have become the winners of the current energy storage market due to their unique technical advantages such as high storage energy per unit volume, high energy conversion rate, no memory effect, low self-discharge rate, and long service life. [0003] However, with the frequent explosion accidents in energy storage power stations in the United States, South Korea and other places, the problem of poor energy storage safety of lithium-ion batteries has returned to the public's vision. And, Wood Mackenzie's research report shows that for every doubling the life of a lithium-ion battery system, its cost doubles. [0004]Therefore, with the increasing scale of renewable energy power generation, in order to truly make energy storage technology play a role in the tr...

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