Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
  • H02J3/28—Arrangements for balancing of the load in networks by storage of energy
  • H02J3/30—Arrangements for balancing of the load in networks by storage of energy using dynamo-electric machines coupled to flywheels
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
  • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
  • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
  • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
  • E04H9/0235—Anti-seismic devices with hydraulic or pneumatic damping
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J15/00—Systems for storing electric energy specially adapted for power networks
  • H02J15/30—Systems for storing electric energy specially adapted for power networks using storage of inertial or mechanical energy, e.g. using flywheels
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/02—Additional mass for increasing inertia, e.g. flywheels
  • H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/08—Structural association with bearings
  • H02K7/09—Structural association with bearings with magnetic bearings
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K16/00—Machines with more than one rotor or stator
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

Definitions

• the present invention relates to a car storage device that converts electric energy into kinetic energy of rotational movement of a flywheel and stores the converted energy.
• Such a power storage device includes a rotor provided with a flywheel on a rotating shaft, a drive power for rotational drive supplied to the rotor, and an induced electromotive force generated by rotation of the rotor after the rotor is driven to rotate.
• a stator having a coil to be taken, bearing means for rotatably supporting a rotating shaft of a rotor, and a casing having the stator and the bearing means and containing the rotor are provided.
• a design with no margin in strength is adopted, and the seismic resistance is low.
• they are often stored in strong containers to prevent scattering by accidents.
• the power storage device focuses on such a problem, and has an object to make the casing elastically supported from the ground and to prevent the casing from swinging to the casing.
• a power storage device includes:
• At least one or more of the rotors is mounted on the ground via a shock absorber together with a bearing casing. It is characterized by being installed
• the rotation speed of a set of rotors is controlled so as to be always the same with an error of 1% or less.
• the torques cancel each other, and the swing of the power storage device is eliminated.
• the natural frequency is supported by the soft panel so that the natural frequency is 0.3 or less, the force transmitted from the ground to the equipment during an earthquake is reduced to 1Z10 or less.
• FIG. 1 is a configuration diagram of a power storage device showing a characteristic portion of a first embodiment of the present invention.
• FIG. 2 is a sectional configuration diagram of one casing of the power storage device of the first embodiment.
• FIG. 3 is an explanatory view of an installation state of the electric storage device of the first embodiment.
• FIG. 4 is an explanatory view of an arrangement state of an air panel below the support means of the first embodiment.
• FIG. 5 is an explanatory diagram of an arrangement state of the casing of the block 1 of the first embodiment.
• FIG. 6 is a cross-sectional view of a casing in a superposed state according to a second embodiment of the present invention.
• Fig. 7 is an explanatory diagram showing a state in which the power storage device of the second embodiment is installed in a con- crete pit.
• FIG. 8 is a plan view showing a state where the power storage device of the second embodiment is disposed in a concrete pit.
• Fig. 11 Graph showing changes in vibration transmissibility when the natural frequency of the entire power storage device of the second embodiment is changed.
• FIG. 1 shows a power storage device shown in the present embodiment, and 1 is a power storage device having an output capacity of 600 Kwh.
• the power storage device 1 is provided in a concrete pit 2 formed on a solid ground as shown in FIG.
• the concrete pit 2 is formed in a rectangular shape with a depth of 5 meters and a side length of 11 meters.
• the block 3 has a rectangular shape with a height of 5 meters and a width of 10 meters, has a weight of 20 t, and includes a pair of casings 4 and 5 inside.
• block 3 is provided on the bottom wall of pit 2 with 16 ⁇ rigid air panels 6a and laterally biased medium-rigid air panels 6b provided on the side walls. Supported.
• the axial rigidity of the air panel 6a is 10 tZ meter, and the loading force is 20 t.
• the loading force of the air panel 6b is 10 t.
• Block 3 has a horizontal stiffness of 40 t-meters.
• a reinforcing beam 3b is erected in the diagonal direction of a rectangle, and the inside of the block 3 is partitioned by vertical walls 3c, 3d.
• the casings 4, 5, etc. are arranged in the storage rooms 7a, 7b, which are partitioned by the vertical wall portions 3c, 3d and are located diagonally.
• the casings 4 and 5 are mounted on the intersections of the beam sections 3b of the storage rooms 7a and 7b, and the side walls are fixed immovably by bolts and the like by the vertical walls 3c and 3d. ing.
• the storage room 7c is provided with an exhaust system device 8a for heat dissipation, and the storage room 7d houses the control panel 8b of the power storage device 1.
• the natural frequency of block 3 in the horizontal direction is 0.2 Hz
• the natural frequency of block 3 in the vertical direction is 0.3 Hz.
• the frequency of the ground wave is 1 Hz or more, which is more than 3 times that of this facility. According to Fig.
• the casings 4 and 5 are a pair, each having an outer diameter of 5 meters, a length of 4 meters and a weight of 20 t, and constitute a support means as a part of the block 3.
• a rotor 9 having a weight of 30 t is provided with a new ffi ⁇ as shown in FIG.
• Each is rotatably supported.
• Bearings 10 for supporting the rotating shaft 9a of the rotor 9 are provided on the upper walls of the casings 4 and 5, and the flywheel 1 of the rotor 9 is provided inside the side walls of the casings 4 and 5.
• Flanges 1 2... for supporting the lower surface of 1... are projected.
• the upper bearing capacity of the flanges 12 ... is 100 t
• the lower support capacity is 10 t
• the horizontal support capacity is 10 t.
• a groove is provided in the center peripheral portion of the flanges 12, and the superconducting pellets 13 are inserted.
• the ultra-compact pellet 13 is cooled by liquid nitrogen by a cooling device (not shown) provided inside the flange 12.
• the superconducting pellet 13 constitutes bearing means for supporting and supporting the rotor 9 together with the magnet 14, and cools the superconducting pellet 13 to generate a repulsive force between the magnet 14 and the magnet 14. As a result, the rotor 9 rises.
• the casing 5 is provided with a rotor 9 having the same configuration as the rotor 9 of the casing 4 and having a mass.
• an armature 16 driven by a spiral coil 15 arranged in the casing 4 is formed on a rotating shaft 9 a of the rotor 9, an armature 16 driven by a spiral coil 15 arranged in the casing 4 is formed.
• the drive coil 15 and the armature 16 generate magnetic force so that the rotation directions of the rotor 9 are opposite to each other. That is, when the rotor 9 of the casing 4 rotates clockwise in FIG. 1, the rotor 9 of the casing 5 rotates to the left at the same rotational speed, and the rotors 9 and 9 of the casings 4 and 5 respectively.
• the direction of action of the generated torque is opposite, the operating torque is the same, and since the casings 4 and 5 are fixed to the block 3, the torque generated by the rotation of the respective rotors 9 and 9 is eliminated.
• the rotation of the rotors 9 and 9 does not act on the block 3 itself.
• the flywheel 11 maintains the rotation of the entire rotor 9 to inertia when the energization of the drive coil 15 is stopped after the energization of the drive coil 15 is stopped after the entire drive of the drive rotor 15 is rotationally driven by the energization of the drive coil 15.
• the rotor 9 has a power generation capacity of 300 O Kw
• the effective facing area for one flywheel 11 to maintain the rotation of the rotor 9 is 2 square meters
• 2 O t It has a lifting capacity, a 2 t pushing capacity, and a 2 t horizontal convergence capacity.
• the rotor 9 since the rotor 9 has five flywheels 11, it has a push-up capacity of 100 t.
• the power storage device 1 when there is a surplus of electric power, when the rotor 9 is driven to rotate by energizing the drive coil 15 incorporated in the casings 4 and 5 in the block 3, a maximum of 4 5 It is driven to rotate at 00 rpm. At this time, a torque of 8 tm is generated in each of the casings 4 and 5, but the casings 4 and 5 are fixed to the block 3, and the rotating directions of the rotors 9 of the casings 4 and 5 are opposite. Since the rotational speeds are equal and the masses are equal, the rotational torques generated by the respective rotors 9 cancel each other out. That is, no reaction force is generated in the block 3 due to the rotation of the rotors 9 and 9. The swing of the block 3 due to the rotation of the rotors 9 and 9 is prevented. Since block 3 is supported on concrete pit 2 by air panels 6a and 6b, block 3 and 3 are shielded from vertical and horizontal vibrations caused by the ground haze.
• FIGS. 6 to 8 show a power storage device 20 according to a second embodiment of the present invention.
• This power storage device 20 is placed in a 100 m square substation with 20 units. It will be installed to equalize day and night loads. A total of 240 000 Kw X 5 h of energy can be stored.
• the casings 4 and 5 shown in the first embodiment are vertically overlapped and fixed so that the rotating shafts 9a of the respective rotors 9 are located on the same axis. It constitutes a support means as a lead block.
• the rotors 9, 9 of the caging 4, 5 have the same mass as each other, are rotated in opposite directions, and are rotated at equal rotational speeds.
• a fixing plate 21 is fixed to the upper part of each of the casings 4 and 5, and a fixing flange 22 is projected from a lower part of the cages 4 and 5, so that the fixing plate 21 and the flange 22 are connected to each other.
• the casings 4 and 5 are integrated by bolt connection.
• the power storage device 20 is installed inside a cylindrical concrete pit 24 having a diameter of 7 m and a depth of 18 m fixed to the ground 23, and a casing provided at an upper portion thereof.
• the fixing plate 21 of 4 is suspended by a spring 25 extending vertically from the upper opening of the concrete pit 24.
• the spring 25 has a rigidity of about 10 tZm and a load force of about 20 t.
• the casings 4 and 5 are suspended by 12 springs 25 extending radially.
• the side walls of casings 4 and 5 are concrete
• the spring 26 and the spring 27 extend in the horizontal direction from the inner wall surface of the single pit 24 and extend tangentially to the cylindrical peripheral walls of the casings 4 and 5.
• the springs 26 and 27 have a lower rigidity than the spring 25 and have a loading force of about 10 t.
• the spring 27 prevents the power storage device 20 from swaying, and the spring 26 is used to reduce the torque of the pack storage device 20.
• An air spring or rubber may be used in place of the springs 26 and 27, and the casings 4 and 5 which are vertically weighed by the air panel as in the first embodiment may be used as concrete pits. You may support from the bottom wall of 24.
• FIGS. 9 and 10 show conceptual diagrams of the electric thread and the mechanical system of the power storage device of the second embodiment.
• the stationary element 16 is driven, and the element is driven by inertia.
• An AC / DC converter (AZD converter) 30 is connected to the drive coil 15 that can take out the induced current as electric power during the rotation of 16.
• An amplifier (DZD converter) is connected to the AC / DC converter 30. 3 1 is connected.
• the amplifiers 31 and 31 of the casings 4 and 5 are further connected to an AC / DC converter (D / A converter) 32.
• a generator 33 and a load 34 are connected to the AC / DC converter 32, and when driving a stationary element 16, the connection to the load 34 is cut off and the drive coil is disconnected.
• Numeral 35 denotes a tachometer for detecting the number of rotations of the armature 16, and tachometer 35 adjusts the data of the number of rotations of the armature 16 when the armature 16 is rotated. It is used as a signal for the width machine 31.
• the tachometer 35 transmits the rotation speed data of the armature 16 to the amplifier 31 as an amplification adjustment signal when the armature 16 rotates due to the inertial rotation of the rotors 9 and 9.
• Figure 10 shows the dynamic model for determining the natural frequency (Hz) of the power storage device 20.
• the mass of the rotor 9 of the casing 4 is Mll
• the mass of the armature 16 of the casing 4 is M12
• the mass of the rotor 9 of the casing 5 is M21
• the mass of the armature 16 of the casing 5 is M22
• the casing 4 The mass of the casing is M13
• the mass of the casing 5 is M23
• the panel constant of the spring 25 is Kl
• the panel constant of the spring 27 is ⁇ 2
• the panel constant of the spring 26 is ⁇ 3, and it acts on the rotating shaft 9a. If the equivalent radius of the secondary moment of the flywheel 1 1 is R3, and the horizontal distance from the rotation center line of the rotating shaft 9a to the mounting position of the torque reducing spring 26 is R4, the following calculation is made. The formula holds.
• FIG. 11 is a graph showing the natural frequencies of the power storage device 20 in the vertical, horizontal, and rotational directions and the transmissibility of the vibrations based on the calculation formula, and the X axis indicates the natural frequency of the power storage device 20. ( ⁇ ⁇ ), and the ⁇ axis shows the vibration transmissibility (percent) relaxed by the springs 25, 26, 27. In this graph, the frequency of ground vibration is 1 mm.
• the vibration transmissibility becomes the highest. If the natural frequency is increased by more than 1, the vibration transmissibility decreases past the peak, but does not fall below approximately 1. However, when the natural frequency of the power storage device 20 is set to 1 or less, a remarkable decrease in the vibration transmissibility is observed, and when the natural frequency is 0.3 Hz,
• the vibration transmissibility is almost 0.1. That is, if the natural frequencies in the vertical, horizontal, and rotational directions are set to 0.3 Hz or less, respectively, the vibration transmissibility in the vertical, horizontal, and rotational directions will be 0.1 or less, respectively. Therefore, if the natural frequencies of the upper, lower, horizontal, and rotational directions of the power storage device S 20 are set to 0.3 Hz or less, respectively, the rate at which vibrations such as poor ground are transmitted to the power storage device 20 However, even if the rotor 9 is rotated at high speed, safety can be ensured.
• the casings 4 and 5 are superposed and stored in the cylindrical concrete pit 24, so that in addition to the effects of the first embodiment, the casings 4 and 5 are added. In the unlikely event of accidents, double safety can be secured. '
• the car storage device As described above, in the car storage device according to the present invention, even when a set of rotors is speeded up or down during power storage or discharge, the power is transmitted from each rotor to casing. The rotational torque as a reaction is canceled, and the swing of the entire power storage device is eliminated. In addition, since it is supported on the ground by soft panels, the power transmitted from the ground to the equipment during farming is extremely small, and the risk of damage to the rotor, casing, bearings, etc. is significantly reduced. That is, according to the present invention, it is possible to design and manufacture a power storage device that is slim and has low friction loss without lowering safety.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Architecture (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Environmental & Geological Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Vibration Prevention Devices (AREA)
• Supply And Distribution Of Alternating Current (AREA)

Priority Applications (4)

Applications Claiming Priority (1)

Publications (1)

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Citations (5)

Family Cites Families (6)

• 1992
  • 1992-04-17 EP EP92908213A patent/EP0594851B1/en not_active Expired - Lifetime
  • 1992-04-17 US US08/162,184 patent/US5541497A/en not_active Expired - Fee Related
  • 1992-04-17 DE DE69205168T patent/DE69205168T2/de not_active Expired - Fee Related
  • 1992-04-17 WO PCT/JP1992/000497 patent/WO1993021680A1/ja not_active Ceased

Patent Citations (5)

Non-Patent Citations (1)

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