Hundred-megawatt level heavy type flywheel energy storage system based on gas magnetic fluid float cylinder suspension

Abstract

The invention discloses a hundred-megawatt level heavy type flywheel energy storage system based on gas magnetic fluid float cylinder suspension. The hundred-megawatt level heavy type flywheel energy storage system based on the gas magnetic fluid float cylinder suspension comprises a heavy type flywheel, a rotating shaft, a driving unit and an output unit. A float cylinder is arranged on the rotating shaft, and the float cylinder is one separation or combination of an air cushion float cylinder, a magnetic suspension float cylinder and a fluid float cylinder. The float cylinder is added on the rotating shaft, load bearing capability of the rotating shaft is improved, and the problem that a heavy type flywheel can not be adopted by an existing flywheel energy storage system is solved. The hundred-megawatt level heavy type flywheel energy storage system has the advantages of being high in energy storage efficiency, strong in dilatation capability and wide in energy storage scale, and has the advantages of being high in power density, long in service life, limitless in charge-discharge times, free-of-pollution and the like as traditional flywheel energy storage technology. The hundred-megawatt level heavy type flywheel energy storage system simultaneously is low in construction requirement, is mainly used in flat suppression fluctuation and smooth grid-tied, can be used for constructing of a super-large scale energy storage pitch peak power station, and can also be used as a distribution type intelligent microgrid energy storage core.

Description

technical field [0001] The invention relates to an energy storage system, in particular to a heavy-duty flywheel energy storage system. Background technique [0002] Large-scale consumption and smooth grid integration of wind power, solar energy and other highly volatile new energy sources have always been thorny issues, seriously restricting the healthy development of wind power, solar energy and other new energy sources. [0003] In order to consume highly volatile new energy on a large scale in a timely manner, there are two key points: one is to build an "economical and large-scale energy storage system" to smoothly connect to the grid; at the same time, as a transfer station for energy, temporarily Second, it is necessary to vigorously increase the transmission capacity of UHV long-distance transmission and transmit electric energy away in a timely manner. [0004] One way to increase transmission capacity is to use flexible DC transmission technology, which can solve ...

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Problems solved by technology

[0034] The superconducting magnetic levitation energy storage uses superconducting magnetic levitation technology to levitate the rotating shaft supporting the flywheel, but only relying on magnetic levitation to achieve the rotating shaft levitation, then the current required for the heavy-duty rotating shaft magnetic levitation will be very large, and the design of the rotating shaft levitation will be very difficult. Not conducive to popularization

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