A flywheel-assisted compressed air hybrid energy storage system and its control method
A hybrid energy storage system and compressed air energy storage technology, which is applied in AC network load balancing, engines, machines/engines, etc., can solve the problems of inflexible flywheel speed control and easy breakage, and achieve slow response speed and power coupling avoid the effect
Active Publication Date: 2017-01-18
SHANDONG UNIV
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Problems solved by technology
However, if the flywheel is rigidly connected to the fan, due to the large inertia of the flywheel, when the speed of the fan shaft and the flywheel do not match, the mechanical bearing is subjected to a large torque and is easy to break
At the same time, the speed of the flywheel is directly determined by the wind speed. Although the CVT is accelerated, the speed control of the flywheel is still not flexible enough
Method used
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[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0037] Such as figure 1 As shown, an electromagnetic coupling hybrid energy storage system, the equipment includes an energy control module 2, a generator or motor 4, an energy conversion module 5, a flywheel, a clutch 6, a scroll compound machine 7 and a high-pressure gas tank 9. The energy conversion module 5 is a mechanism similar to a motor, the stator and the rotor both rotate, the rotor is connected to the flywheel, the stator is connected to the generator or motor and is connected to the vortex machine through a clutch. The scroll composite machine 7 is connected with the high-pressure gas tank 9 through the multiplexing high-pressure gas circuit 8 .
[0038] As a preferred example of the present invention, the above-mentioned energy conversion module is a device similar to a motor. The rotor is wound around the armature and connected to three-p...
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The invention discloses a flywheel assisted compressed air mixed energy storage system and a control method thereof. The system comprises an intermittent power generation power supply, an energy control module, an energy conversion module, a vortex type compound machine and a gas storage device, wherein the intermittent power generation power supply is connected with the energy control module which is connected with a power machine, the power machine is connected with the energy conversion module, the energy conversion module is connected with compressed air through a clutch, and the vortex type compound machine is connected with the gas storage device through a high-pressure gas path; and the energy control module is simultaneously connected with power load, acquires generated power and power load of the intermittent power generation power supply and determines the charge-discharge state of the energy storage system according to the differential value of the generated power and the power load. Charge-discharge operation is performed by flywheel energy storage equipment with a high response speed; and when SOC (state of charge) of flywheel energy storage equipment reaches a set value, the compressed air energy storage equipment is started and matched with the flywheel energy storage equipment for charge and discharge, and rapid response required for charge and discharge of a distributed power generation system is realized.
Description
technical field [0001] The invention relates to a hybrid energy storage device for converting distributed energy such as wind energy and solar energy into compressed air potential energy and kinetic energy storage, in particular to a flywheel-assisted compressed air hybrid energy storage system and a control method thereof. Background technique [0002] Energy is an important material basis for the survival and development of human beings. It is related to the national economy, the people's livelihood and national security. It is also the primary field of technological innovation services and applications. Efficient, clean and low-carbon new energy power generation has become the mainstream direction of energy development in the world today. At present, the power supply system is tending to be networked across regions or even across borders, with round-the-clock power supply; a variety of intermittent energy sources such as wind energy and solar energy are connected to the s...
Claims
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IPC IPC(8): H02J3/28H02J3/30F03G3/08
CPCY02E60/16
Inventor 张承慧李珂马昕吕伟龙
Owner SHANDONG UNIV