Flywheel energy storage power assembly

Abstract

The utility model relates to the flywheel field, concretely is a flywheel energy storage power assembly. It is composed of power unit and capacitor unit, two capacitor units are arranged, two capacitor units are located power unit both sides respectively, capacitor unit and power unit electric connection, two capacitor units electric connection, three -phase alternating current is input to one side of power unit, then is converted into direct current and is input to one capacitor unit, is input to another capacitor unit again, then input to the other side of power unit is converted into alternating current and exports. In the utility model, capacitor unit is installed in both sides, power unit is installed in the middle, three components are independently installed, can be respectively disassembled and maintained, the water cooling board in the middle of power unit, both sides are all installed with electrical components, rectification and inversion are integrated together, save the cost.

Description

Technical Field

[0001] This utility model relates to the field of flywheels, and more particularly to a flywheel energy storage power component. Background Technology

[0002] In the 1950s, academic research on flywheel energy storage began. In 1973, the U.S. Energy Research and Development Agency and other institutions spearheaded related research, followed by the UK, France, and other countries. In the mid-to-late 1990s, flywheel energy storage technology in the U.S. entered the industrialization stage, achieving commercialization in the field of uninterruptible power supply (UPS) transition power sources. During the same period, Chinese research institutions also began related research; for example, Tsinghua University established its first flywheel energy storage technology research laboratory in 1995 and developed its first flywheel energy storage system in 1997. Later, the field evolved from the thyristor era to the current era of fully controlled devices. With the development of IGBTs, converter technology entered a high-frequency stage, and with the continuous maturation of the technology, the devices used have achieved domestic substitution.

[0003] However, the rectifier power unit and inverter power unit of domestically produced converter equipment are designed separately, requiring two power units to realize the function. Moreover, the designed power units are large in size and complex in structure, so the cost is still too high. Utility Model Content

[0004] The purpose of this invention is to address the problem of high cost of converters in the background technology by proposing a flywheel energy storage power component.

[0005] The technical solution of this utility model is as follows: A flywheel energy storage power component, which consists of a power unit and a capacitor unit; two capacitor units are provided, which are located on both sides of the power unit respectively, and the capacitor units are electrically connected to the power unit. Three-phase AC power is input to one side of the power unit, and then converted into DC power and input to one of the capacitor units, then to the other capacitor unit, and then input to the other side of the power unit and converted into AC power for output.

[0006] Preferably, the power unit includes a water-cooled plate and electrical components disposed on both sides of the water-cooled plate. The electrical components on both sides have the same structure and are mirror symmetrical. One set of electrical components converts the externally input three-phase AC power into DC power, and the other set of electrical components converts the DC power back into AC power. Sheet metal is provided at both the upper and lower ends of the water-cooled plate.

[0007] Preferably, flow pipes are installed at both the upper and lower ends of the rear side of the water-cooled plate, with one flow pipe leading in and the other leading out to complete the circulation of coolant.

[0008] Preferably, the electrical components include three IGBTs disposed on the side of the water-cooled plate, a drive circuit board disposed on the IGBTs, a stacked busbar disposed on the IGBTs, and an absorption capacitor disposed on the stacked busbar; the IGBTs are electrically connected to the drive circuit board, the IGBTs are electrically connected to the stacked busbar, the stacked busbar is electrically connected to the absorption capacitor, and the stacked busbar is electrically connected to the capacitor unit; the IGBTs in the two sets of electrical components are respectively electrically connected to an AC input busbar and an AC output busbar.

[0009] Preferably, the water-cooled plate is equipped with a temperature control switch, a thermistor, and a terminal block, and both the temperature control switch and the thermistor are electrically connected to the terminal block.

[0010] Preferably, the capacitor unit includes a DC capacitor mounting sheet metal, a plurality of DC capacitors disposed on the DC capacitor mounting sheet metal, and a DC capacitor busbar disposed on the plurality of DC capacitors. The DC capacitors are electrically connected to the DC capacitor busbar, and the DC capacitor busbar is electrically connected to the laminated busbar.

[0011] Preferably, the DC capacitor busbar and the DC capacitor are connected by sheet metal mounting, and the DC capacitors are connected to the DC capacitor busbar by bolts. Each capacitor unit contains ten DC capacitors.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects: the capacitor unit is installed on both sides, the power unit is installed in the middle, the three components are installed independently and can be disassembled and maintained separately, the power unit has a water-cooled plate in the middle and electrical components are installed on both the left and right sides, integrating rectification and inversion into one, saving costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the power unit structure;

[0015] Figure 3 for Figure 2 Partial structural diagram;

[0016] Figure 4 This is a schematic diagram of the capacitor unit.

[0017] Figure 5 This is the circuit schematic.

[0018] Reference numerals: 1. Capacitor unit; 2. Power unit; 3. Water-cooled plate; 4. Flow tube; 5. IGBT; 6. Driver circuit board; 7. Mounting sheet metal; 8. Terminal block; 9. Insulator; 10. Thermistor; 11. Temperature control switch; 12. AC input busbar; 13. Laminated busbar; 14. Absorption capacitor; 15. DC capacitor mounting sheet metal; 16. DC capacitor busbar; 17. DC capacitor; 18. Negative busbar; 19. Positive busbar; 20. Handle; 21. AC output busbar. Detailed Implementation

[0019] Example 1

[0020] like Figure 1 As shown, the flywheel energy storage power component proposed in this utility model consists of a power unit 2 and a capacitor unit 1. Two capacitor units 1 are provided, located on both sides of the power unit 2 respectively. The capacitor units 1 and the power unit 2 are electrically connected and connected by copper busbars. The capacitor units 1 and the power unit 2 are installed independently and can be disassembled and maintained separately. Three-phase AC power is input to one side of the power unit 2, then converted to DC power and input to one of the capacitor units 1, then to the other capacitor unit 1, and then input to the other side of the power unit 2 and converted to AC power for output.

[0021] Example 2

[0022] like Figure 2 , Figure 3 and Figure 5 As shown, this utility model proposes a flywheel energy storage power component. Compared with Embodiment 1, this embodiment details the structure of the power unit 2.

[0023] The power unit 2 includes a water-cooled plate 3 and electrical components located on both sides of the water-cooled plate 3, integrating rectification and inversion into one unit to save costs. The electrical components on both sides have identical structures and are mirror-symmetrical, allowing the power unit to be rotated 180 degrees for installation without needing to distinguish between rectification and inversion, making installation simple and convenient. One set of electrical components converts the external three-phase AC power into DC power, while the other set converts the DC power back into AC power. For easy installation and connection, mounting sheet metal 7 is provided at both the top and bottom of the water-cooled plate 3, and a handle 20 is provided on the front side of the water-cooled plate 3. Flow pipes 4 are provided at both the top and bottom of the rear side of the water-cooled plate 3, with one inlet and one outlet completing the circulation of coolant. A temperature control switch 11, a thermistor 10, and a terminal block 8 are installed on the water-cooled plate 3. Both the temperature control switch 11 and the thermistor 10 are electrically connected to the terminal block 8. Both the temperature control switch 11 and the thermistor 10 are used to measure the temperature of the water-cooled plate 3. The difference is that the temperature control switch 11 is normally closed. When the water-cooled plate 3 reaches a certain temperature, it will open to control the circuit on and off. The thermistor 10 measures the temperature of the water-cooled plate 3 in real time and then transmits the data to the control board through the terminal block 8. It should be noted that the control board here refers to other external control systems, not the drive circuit board 6.

[0024] Furthermore, the electrical components include three IGBTs 5 mounted on the side of the water-cooled plate 3, a drive circuit board 6 mounted on the IGBTs 5, a multilayer busbar 13 mounted on the IGBTs 5, and absorption capacitors 14 mounted on the multilayer busbar 13. The absorption capacitors 14 are bolted to the multilayer busbar 13, and six absorption capacitors 14 are mounted on each multilayer busbar 13. The multilayer busbar 13 is connected to the water-cooled plate 3 via multiple insulators 9. The IGBTs 5 and the drive circuit board 6 are bolted together, and the IGBTs 5 and the drive circuit board 6 are electrically connected. The IGBTs 5 and the multilayer busbar 13 are electrically connected, and the multilayer busbar 13 and the absorption capacitors 14 are electrically connected. Unit 1 is electrically connected. Specifically, the stacked busbar 13 is equipped with a negative terminal 18 and a positive terminal 19. The negative terminal 18, positive terminal 19 and capacitor unit 1 are connected from the front using bolts, which is convenient and quick. The IGBT5 is equipped with a driver board interface, and the driver circuit board 6 is also equipped with an external output interface, which can be electrically connected to other external devices. The IGBT5 in the two sets of electrical components are electrically connected to the AC input busbar 12 and the AC output busbar 21 respectively. The AC input busbar 12 and the AC output busbar 21 are both fixed with bolts, and the other end is fixed to the water-cooled plate 3 through an insulator. The AC input busbar 12 is used as the input of external three-phase power, and the AC output busbar 21 is used as the output of AC power.

[0025] Example 3

[0026] like Figure 1 , Figure 4 and Figure 5As shown, this utility model proposes a flywheel energy storage power component. Compared with Embodiment 2, this embodiment details the structure of the capacitor unit 1.

[0027] The capacitor unit 1 includes a DC capacitor mounting sheet 15, a plurality of DC capacitors 17 disposed on the DC capacitor mounting sheet 15, and a DC capacitor busbar 16 disposed on the plurality of DC capacitors 17. The DC capacitors 17 are electrically connected to the DC capacitor busbar 16, and the DC capacitor busbar 16 is electrically connected to the laminated busbar 13.

[0028] Furthermore, the DC capacitor busbar 16 is connected to the DC capacitor mounting sheet metal 15 through multiple insulators, and the DC capacitor 17 is connected to the DC capacitor busbar 16 through bolts. Each capacitor unit 1 contains ten DC capacitors 17, which are arranged in five rows and two columns.

[0029] In summary, in use, the three-phase AC power is input from AC input bus 12, converted to DC power by IGBT 5, and input to one side of the stacked busbar 13. Then, it flows from the stacked busbar 13 to a DC capacitor busbar 16 in capacitor unit 1, then through a copper busbar to another DC capacitor busbar 16, and finally to the stacked busbar 13 on the other side of the water-cooled plate 3. After being converted back to AC power by IGBT 5, it is finally output through AC output busbar 21. Capacitor unit 1 is installed on both sides, and power unit 2 is installed in the middle. These three components are installed independently and can be disassembled and maintained separately. Power unit 2 has a water-cooled plate in the middle and electrical components on both sides, integrating rectification and inversion into one unit, saving costs.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A flywheel energy storage power component, comprising a power unit (2) and a capacitor unit (1); characterized in that, Two capacitor units (1) are provided, and the two capacitor units (1) are located on both sides of the power unit (2). The capacitor units (1) are electrically connected to the power unit (2). The three-phase AC power is input to one side of the power unit (2), and then converted into DC power and input to one of the capacitor units (1), then input to the other capacitor unit (1), and then input to the other side of the power unit (2) and converted into AC power for output.

2. The flywheel energy storage power module according to claim 1, characterized in that, The power unit (2) includes a water-cooled plate (3) and electrical components arranged on both sides of the water-cooled plate (3). The electrical components on both sides have the same structure and are mirror symmetrical. One set of electrical components converts the three-phase AC power input from the outside into DC power, and the other set of electrical components converts the DC power back into AC power. Sheet metal (7) is installed at both the upper and lower ends of the water-cooled plate (3).

3. The flywheel energy storage power component according to claim 2, characterized in that, A flow pipe (4) is installed at both the upper and lower ends of the rear side of the water-cooled plate (3). The two flow pipes (4) are connected to each other to complete the circulation of coolant.

4. The flywheel energy storage power module according to claim 2, characterized in that, The electrical components include three IGBTs (5) mounted on the side of the water-cooled plate (3), a drive circuit board (6) mounted on the IGBTs (5), a stacked busbar (13) mounted on the IGBTs (5), and an absorption capacitor (14) mounted on the stacked busbar (13); the IGBTs (5) and the drive circuit board (6) are electrically connected, the IGBTs (5) and the stacked busbar (13) are electrically connected, the stacked busbar (13) and the absorption capacitor (14) are electrically connected, and the stacked busbar (13) and the capacitor unit (1) are electrically connected; the IGBTs (5) in the two sets of electrical components are electrically connected to an AC input busbar (12) and an AC output busbar (21) respectively.

5. The flywheel energy storage power module according to claim 2, characterized in that, A temperature control switch (11), a thermistor (10), and a terminal block (8) are provided on the water-cooled plate (3). The temperature control switch (11) and the thermistor (10) are electrically connected to the terminal block (8).

6. The flywheel energy storage power component according to claim 4, characterized in that, The capacitor unit (1) includes a DC capacitor mounting sheet metal (15), a plurality of DC capacitors (17) disposed on the DC capacitor mounting sheet metal (15), and a DC capacitor busbar (16) disposed on the plurality of DC capacitors (17). The DC capacitors (17) are electrically connected to the DC capacitor busbar (16), and the DC capacitor busbar (16) is electrically connected to the laminated busbar (13).

7. The flywheel energy storage power module according to claim 6, characterized in that, The DC capacitor busbar (16) is connected to the DC capacitor mounting sheet metal (15), and the DC capacitor (17) is connected to the DC capacitor busbar (16) by bolts. Each capacitor unit (1) contains ten DC capacitors (17).

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