Synchronous phase modifier energy storage method based on magnetic gear coupling
An energy storage method and magnetic gear technology, which are applied in the direction of AC network load balancing, reducing/preventing power oscillation, and AC network circuits, etc. The problem of small energy capacity, etc., to achieve the effect of fast response of one frequency modulation
Active Publication Date: 2021-06-11
CHINA ELECTRIC POWER RES INST
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However, reserving spare capacity will undoubtedly reduce the effective utilization hours of new energy, and the economic benefits are not good
At present, the energy storage suitable for new energy stations mainly includes electric energy storage and mechanical energy storage. Flywheel mechanical energy storage has a long service life and is suitable for occasions that require frequent adjustments, but the energy storage capacity is usually small; electric energy storage The capacity is large, but frequent charging and discharging will seriously affect the service life; therefore, the method of mechanical energy storage + electric energy storage is more in line with the technical direction of primary frequency modulation of new energy
[0005] In addition to the lack of inertia support for new energy stations, traditional tuners are also unable to provide primary frequency modulation support
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[0019] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.
[0020] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...
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The invention discloses a synchronous phase modifier energy storage method based on magnetic gear coupling, and belongs to the technical field of motors and electric appliances. The method comprises the following steps of: electrically coupling a phase modifier and a flywheel device by using a magnetic gear; setting a ratio of the number of magnet adjusting iron blocks of the magnetic gear to the number of inner-layer rotors to be equal to a ratio of a rotating speed of the flywheel device to a rotating speed of the phase modifier; connecting the magnetic gear with a three-phase alternating current converter, so that the frequency modulation power borne by the converter is in direct proportion to the speed regulation range of the flywheel device; and controlling energy storage of the synchronous phase modifier by adjusting the rotating speed of the flywheel device. The synchronous phase modifier energy storage method has the advantages of a traditional synchronous phase modifier and flywheel energy storage, the inherent inertia supporting capacity of the phase modifier is greatly improved, the phase modifier has the primary frequency modulation capacity, the rotating speed of the flywheel is multiplied through the magnetic gear, and the inertia time constant of the phase modifier can be greatly improved by configuring a small flywheel.
Description
technical field [0001] The invention relates to the technical field of motors and electrical appliances, and more specifically, to a method for storing energy in synchronous condensers based on magnetic gear coupling. Background technique [0002] With the advancement of the national energy strategy, the annual installed capacity of new energy will exceed 100 million kilowatts during the 14th Five-Year Plan period. When the proportion of new energy is greatly increased, the trend of power electronics in the power system is increasing. The voltage support, inertia support and frequency modulation capabilities of the power system continue weakening, seriously threatening the safe and stable operation of the power system. For this reason, GB 38755 "Guidelines for the Safety and Stability of Power Systems" released in 2019 requires that new energy stations should provide certain short-circuit capacity and inertia support to the system; Regulation resources such as power station...
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IPC IPC(8): H02J3/30H02J3/24
CPCH02J3/30H02J3/241Y02E60/16
Inventor 李志强孙华东郭强王东阳李文锋
Owner CHINA ELECTRIC POWER RES INST