Power supply system

Abstract

To provide a power supply system in which the power converter is easily replaceable and which has excellent insulation between the power converter and the input / output panel. [Solution] The power supply system comprises a busbar panel, a power converter, and an input / output panel electrically connected to the busbar panel and the power converter. The input / output panel includes a first housing and a first busbar member projecting upward from the first housing. The power converter includes a second housing and a second busbar member projecting upward from the second housing. The power supply system further comprises a connecting member located above the first and second housings and electrically connecting the first busbar member and the second busbar member, and a cover that covers the first busbar member, the second busbar member and the connecting member from above and is detachable from the first and second housings.

Description

Technical Field

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[0001] The present disclosure relates to a power supply system.

Background Art

[0002] Conventionally, power supply systems are known. For example, Japanese Unexamined Patent Application Publication No. 2020-39250 (Patent Document 1) discloses an uninterruptible power supply system as an example of a power supply system. The uninterruptible power supply system includes a main body portion provided with at least one of a rectifier and an inverter and placed in a direction perpendicular to the installation surface, a main body side connection portion provided on the main body portion and electrically connected to at least one of the rectifier and the inverter, and a frame side connection portion arranged to be connectable to the main body side connection portion in a state where the main body portion is placed on the installation surface and electrically connected to a peripheral board which is at least one of an input transformer board, a battery board, and a branch board.

[0003] Specifically, in the uninterruptible power supply system of Patent Document 1, the main body portion and the peripheral board are arranged side by side, and the main body portion and the peripheral board are electrically connected by the main body side connection portion and the frame side connection portion. More specifically, in the uninterruptible power supply system, the main body and the peripheral board are electrically connected by inserting the electrode plate of the main body side connection portion into the clamping body of the frame side connection portion.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described above, the uninterruptible power supply system of Patent Document 1 has a configuration in which the electrode plate of the main unit-side connection part is inserted into the clamping body of the frame-side connection part. Therefore, in this uninterruptible power supply system, there is a risk of short circuits occurring due to the accumulation of dust and moisture at the boundary between the main unit and the peripheral panel. Thus, the uninterruptible power supply system of Patent Document 1 cannot be said to have high insulation performance at the connection point between the main unit and the peripheral panel.

[0006] This disclosure provides a power supply system in which the power converter corresponding to the main unit is easily replaceable, and which has excellent insulation between the power converter and the input / output panel corresponding to the peripheral panel. [Means for solving the problem]

[0007] In accordance with certain aspects of this disclosure, a power supply system comprises a busbar, a power converter, and an input / output panel electrically connected to the busbar and the power converter. The input / output panel includes a first enclosure and a first busbar projecting upward from the first enclosure. The power converter includes a second enclosure and a second busbar projecting upward from the second enclosure. The power supply system further comprises a connecting member located above the first and second enclosures and electrically connecting the first busbar and the second busbar, and a cover that covers the busbar member and the connecting member from above and is removable from the first and second enclosures. [Effects of the Invention]

[0008] According to this disclosure, the power supply system allows for easy replacement of the power converter and provides excellent insulation between the power converter and the input / output panel. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view of the power supply system. [Figure 2] This diagram shows the circuit configuration of the power supply system. [Figure 3] This is a diagram illustrating the circuitry between an uninterruptible power supply (UPS) and an input / output panel. [Figure 4]This is a perspective view of a set of uninterruptible power supplies and an input / output panel. [Figure 5] This is a plan view showing the inside of the cover. [Figure 6] This is a cross-sectional view taken along the line VI-VI in Figure 5. [Figure 7] This is a diagram illustrating the procedure for replacing an uninterruptible power supply (UPS). [Figure 8] This diagram illustrates the insulation treatment at connection points in a power system. [Figure 9] This diagram shows the state after the insulating material has been removed. [Modes for carrying out the invention]

[0010] The following description of a power conversion device according to an embodiment of the present invention will be given with reference to the drawings. In detail, an uninterruptible power system (UPS) will be used as an example of a power conversion device. In the following description, identical parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions of them will not be repeated.

[0011] Furthermore, while the embodiments described below may refer to the number, quantity, etc., the scope of this disclosure is not necessarily limited to such number, quantity, etc. In addition, the drawings do not depict the dimensions in proportion to the actual dimensions, and in order to facilitate understanding of the structure, the proportions have been altered in some places to make the structure clearer.

[0012] Figure 1 is a perspective view of the power supply system according to this embodiment. As shown in Figure 1, the power supply system 1 comprises a main distribution board 2, a plurality of uninterruptible power supplies 3, and a plurality of input / output boards (I / O boards) 4. The main distribution board 2 and the plurality of input / output boards 4 together are also referred to as a "power distribution board."

[0013] The input / output panel 4 is provided for each uninterruptible power supply device 3. Each input / output panel 4 is electrically connected to the bus tie panel 2 and one uninterruptible power supply device 3. In the example of FIG. 1, the power system 1 includes six sets of an uninterruptible power supply device 3 and an input / output panel 4. The input / output panel 4 indirectly and electrically connects the uninterruptible power supply device 3 to the bus tie panel 2. <​​​​​​​​​​​​​​​​​​​​​The input / output board 4 includes a circuit 41 on the AC input side, a circuit 42 for bypass input, and a circuit 43 on the AC output side. The circuit 41 includes a breaker 411 and a bus bar member 415. The bus bar member 415 is located downstream of the breaker 411 and is electrically connected to the breaker 411. The circuit 42 includes a breaker 421 and a bus bar member 426. The bus bar member 426 is located downstream of the breaker 421 and is electrically connected to the breaker 421. The circuit 43 includes a breaker 431 and a bus bar member 437. The bus bar member 437 is located upstream of the breaker 431 and is electrically connected to the breaker 431.

[0020] The bus bar member 415 is used for three-phase AC input to the uninterruptible power supply device 3. The bus bar member 426 is used for three-phase bypass input. The bus bar member 437 is used for three-phase AC output from the uninterruptible power supply device 3. The bus bar member 415 is connected to the connecting member 101. The bus bar member 426 is connected to the connecting member 102. The bus bar member 437 is connected to the connecting member 103.

[0021] The uninterruptible power supply device 3 includes a circuit 31, a circuit 32 branched from the circuit 31, and a bypass circuit 33. The circuit 31 includes a bus bar member 345, a breaker 311, a converter 312, an inverter 313, a breaker 314, and a bus bar member 347 in this order from the upstream side to the downstream side. The circuit 32 includes a chopper circuit 321 and a breaker 322. The breaker 322 is located downstream of the chopper circuit 321. The circuit 33 includes a bus bar 346, a breaker 331, and a thyristor 332. The breaker 331 and the thyristor 332 are connected in parallel on the downstream side of the bus bar 346. The circuit 33 is connected to the circuit 31 between the breaker 314 and the bus bar member 347 of the circuit 31.

[0022] The output from converter 312 is split between inverter 313 and chopper circuit 321. The chopper circuit 321 is connected to circuit 32. The chopper circuit 321 converts AC to DC. This DC is used to charge the storage battery 5 (Figure 2).

[0023] Busbar member 345, like busbar member 415, is used for the three-phase AC input to the uninterruptible power supply 3. Busbar member 346, like busbar member 426, is used for the three-phase bypass input. Busbar member 347, like busbar member 437, is used for the three-phase AC output from the uninterruptible power supply 3. Busbar member 345 is connected to connecting member 101. Busbar member 346 is connected to connecting member 102. Busbar member 347 is connected to connecting member 103.

[0024] As described above, the busbar member 415 of the input / output panel 4 and the busbar member 345 of the uninterruptible power supply 3 are electrically connected by the connecting member 101. The busbar member 426 of the input / output panel 4 and the busbar member 346 of the uninterruptible power supply 3 are electrically connected by the connecting member 102. The busbar member 437 of the input / output panel 4 and the busbar member 347 of the uninterruptible power supply 3 are electrically connected by the connecting member 103. Details of each connection configuration will be described later.

[0025] Figure 4 is a perspective view of a set of uninterruptible power supplies 3 and an input / output panel 4. As shown in Figure 4, the uninterruptible power supply 3 further comprises a housing 35, a cover 36, a number of fans 37, and a cover 38. The input / output panel 4 further comprises a housing 45, a cover 46, and a communication interface panel 47.

[0026] The enclosure 35 has a top surface 35a. The enclosure 35 incorporates the converter 312, inverter 313, and chopper circuit 321 described above. Each fan 37 is mounted on the top surface 35a.

[0027] The cover 38 is detachable from the housing 45 of the input / output panel 4 and the housing 35 of the uninterruptible power supply 3. The cover 38 has a side wall portion 381 and a top surface portion 382. The top surface portion 382 is detachably attached to the side wall portion 381. The top surface portion 382 is attached to the upper end surface of the side wall portion 381, for example, by bolts. In this case, an opening with female threads cut vertically downward is formed on the upper end surface. The side wall portion 381 is detachably attached to the housing 45 and the housing 35.

[0028] The cover 38 covers the busbar members 415, 426, and 437 of the input / output panel 4, the busbar members 345, 346, and 347 of the uninterruptible power supply 3, and the connecting members 101 to 103 from above. The top surface 382 is preferably transparent from the viewpoint of being able to see the inside of the cover 38. However, it is not limited to this, and the top surface 382 may be semi-transparent or opaque.

[0029] With such a cover 38, dust and water droplets can be prevented from entering the space inside the cover. Therefore, the insulation between the uninterruptible power supply 3 and the input / output panel 4 can be improved.

[0030] To improve the airtightness inside the cover 38, it is preferable to install a packing between the top surface 382 and the side wall 381. The packing may be a part of the top surface 382, ​​a part of the side wall 381, or separate from the top surface 382 and the side wall 381. Similarly, it is preferable to install a packing between the lower end surface of the side wall 381 and the housings 35, 45. The packing may be a part of the side wall 381 or separate from the side wall 381.

[0031] Figure 5 is a plan view showing the inside of the cover 38. Figure 6 is a cross-sectional view taken along the line VI-VI in Figure 5.

[0032] As shown in Figure 5, the busbar members 345, 346, and 347 protrude upward (vertically upward, in the positive Z-axis direction) from the housing 35 of the uninterruptible power supply 3. The busbar members 345, 346, and 347 extend upward from the top surface 35a of the housing 35. As shown in Figures 5 and 6, the busbar members 415, 426, and 437 protrude upward from the housing 45 of the input / output panel 4. The busbar members 415, 426, and 437 extend upward from the top surface 45a of the housing 45.

[0033] The connecting members 101 to 103 are located above the housing 35 and housing 45. The connecting members 101 to 103 are located above the top surfaces 35a and 45a. Connecting member 101 is fastened to busbar members 345 and 415 by bolts 801 and nuts 802 (bolted fastening). Connecting member 102 is fastened to busbar members 346 and 426 by bolts 801 and nuts 802. Connecting member 103 is fastened to busbar members 347 and 437 by bolts 801 and nuts 802. By fastening them with bolts in this manner, each connecting member 101 to 103 can be securely fixed to each busbar member 345, 346, 347, 415, 426, and 437.

[0034] More specifically, as shown in Figure 5, busbar member 345 includes a busbar 345U for the U phase, a busbar 345V for the V phase, and a busbar 345W for the W phase of the three-phase (U phase, V phase, W phase). Busbar member 346 includes a busbar 346U for the U phase, a busbar 346V for the V phase, and a busbar 346W for the W phase. Busbar member 347 includes a busbar 347U for the U phase, a busbar 347V for the V phase, and a busbar 347W for the W phase. The nine busbars 345U, 345V, 345W, 346U, 346V, 346W, 347U, 347V, and 347W are arranged in a line in the Y direction and are parallel to each other.

[0035] Busbar member 415 includes a U-phase busbar 415U, a V-phase busbar 415V, and a W-phase busbar 415W. Busbar member 426 includes a U-phase busbar 426U, a V-phase busbar 426V, and a W-phase busbar 426W. Busbar member 437 includes a U-phase busbar 437U, a V-phase busbar 437V, and a W-phase busbar 437W. The nine busbars 415U, 415V, 415W, 426U, 426V, 426W, 437U, 437V, and 437W are arranged in a line in the Y direction and are parallel to each other.

[0036] The connecting member 101 includes a conductor plate 101U that connects busbar 345U and busbar 415U, a conductor plate 101V that connects busbar 345V and busbar 415V, and a conductor plate 101W that connects busbar 345W and busbar 415W.

[0037] The connecting member 102 includes a conductor plate 102U that connects busbar 346U and busbar 426U, a conductor plate 102V that connects busbar 346V and busbar 426V, and a conductor plate 102W that connects busbar 346W and busbar 426W.

[0038] The connecting member 103 includes a conductor plate 103U that connects busbar 347U and busbar 437U, a conductor plate 103V that connects busbar 347V and busbar 437V, and a conductor plate 103W that connects busbar 347W and busbar 437W.

[0039] As shown in Figures 5 and 6, the nine conductor plates 101U, 101V, 101W, 102U, 102V, 102W, 103U, 103V, and 103W are aligned in the Y direction and extend in the X direction. The nine conductor plates 101U, 101V, 101W, 102U, 102V, 102W, 103U, 103V, and 103W are parallel to each other.

[0040] As shown in Figure 6, the conductor plates 101U, 101V, and 101W are positioned at different heights. Of the three conductor plates 101U, 101V, and 101W, conductor plate 101U is positioned at the lowest position, and conductor plate 101W is positioned at the highest position.

[0041] Similarly, conductor plates 102U, 102V, and 102W are positioned at different heights. Of the three conductor plates 102U, 102V, and 102W, conductor plate 102U is positioned at the lowest position, and conductor plate 102W is positioned at the highest position.

[0042] Similarly, conductor plates 103U, 103V, and 103W are positioned at different heights. Of the three conductor plates 103U, 103V, and 103W, conductor plate 103U is positioned at the lowest position, and conductor plate 103W is positioned at the highest position.

[0043] Thus, adjacent conductor plates are positioned at different heights. Therefore, the insulation distance can be increased compared to when adjacent conductor plates are set at the same height.

[0044] In this example, conductor plates 101U, 102U, and 103U are installed at the same height. Similarly, conductor plates 101V, 102V, and 103V are installed at the same height. Conductor plates 101W, 102W, and 103W are installed at the same height.

[0045] Figure 7 illustrates the procedure for replacing the uninterruptible power supply (UPS) 3. In power system 1, to replace a specific UPS 3 while power system 1 is running, it is first necessary to switch each of the circuit breakers 411, 421, and 431 (Figure 3) of the input / output panel 4 from the ON state to the OFF state. Next, it is necessary to disconnect the UPS 3 from the input / output panel 4. The following describes how to disconnect the UPS 3 from the input / output panel 4.

[0046] The connection between the uninterruptible power supply (UPS) 3 and the input / output panel 4 includes the connection of the power system using the connection members 101 to 103 described above, and the connection of a communication cable (not shown). For example, the connection of the communication cable is disconnected first, and then the connection of the power system using the connection members 101 to 103 is disconnected. However, the order of disconnection is not limited to this.

[0047] The communication cable on the uninterruptible power supply (UPS) 3 side is installed inside cover 36. The communication cable on the input / output panel 4 side is installed inside cover 46. Both communication cables are electrically connected by a connector (not shown) near the boundary between cover 36 and cover 46. Therefore, the worker first removes cover 36 from the housing 35, and then removes cover 46 from the housing 45. After that, the worker disconnects the connection between both communication cables using the connector.

[0048] Next, the worker disconnects the power system using the connecting members 101-103. First, the worker removes the cover 38 from the housings 35 and 45. Alternatively, the worker may remove only the top surface 38a of the cover 38.

[0049] Next, as shown in Figure 7, the worker disconnects the connection between the connecting member 101 and the busbar member 345 (see Figures 3 and 5), the connection between the connecting member 102 and the busbar member 346, and the connection between the connecting member 103 and the busbar member 346.

[0050] Specifically, the worker disconnects the three conductor plates 101U, 101V, and 101W that constitute the connecting member 101 from the three bus bars 345U, 345V, and 345W that constitute the bus bar member 345. More specifically, the worker disconnects the bolts 801 and nuts 802 that fasten the conductor plates 101U, 101V, and 101W to the bus bars 345U, 345V, and 345W.

[0051] Similarly, the worker disconnects the three conductor plates 102U, 102V, and 102W that make up the connecting member 102 from the three bus bars 346U, 346V, and 346W that make up the bus bar member 346. The worker disconnects the three conductor plates 103U, 103V, and 103W that make up the connecting member 103 from the three bus bars 347U, 347V, and 347W that make up the bus bar member 347.

[0052] As described above, by disconnecting the connections at the nine locations in the power system, it becomes possible to remove the uninterruptible power supply (UPS) 3 from the input / output panel 4, which is connected to the main distribution panel 2. It also becomes possible to move the UPS 3 away from the main distribution panel 2 towards the worker.

[0053] In addition to disconnecting the connections at the nine locations mentioned above, the connections between connecting member 101 and busbar member 415 (see Figures 3 and 5), connecting member 102 and busbar member 426, and connecting member 103 and busbar member 437 may also be further disconnected.

[0054] When connecting a new uninterruptible power supply (not shown) to the input / output panel 4, the worker simply connects the connecting members 101 to 103 to the respective busbar members of the new uninterruptible power supply, and then reattaches the removed cover 38 to the housings 35 and 45. Furthermore, the worker simply connects the communication cable of the new uninterruptible power supply to the communication cable of the input / output panel 4.

[0055] Thus, in power supply system 1, an operator can begin the process of disconnecting the power system of the uninterruptible power supply 3 by removing the cover 38. Therefore, the power converter can be easily replaced in power supply system 1.

[0056] In particular, by turning off the circuit breakers 411, 421, and 431 of the input / output panel 4 in advance, the worker can perform the replacement of the uninterruptible power supply (UPS) 3 while the power supply system 1 is running. That is, the worker can replace the UPS 3 to be replaced while the remaining UPS 3 are running (supplying power to the load). In this way, the power supply system 1 can continue to supply power to the load even when the UPS 3 is being replaced.

[0057] The uninterruptible power supply (UPS) 3, the distribution board 2, and the input / output board 4 typically have different service lives. The service life of the UPS 3 (for example, 15 years) is typically shorter than that of the distribution board 2 (for example, 25 years) and the input / output board 4 (for example, 25 years). As described above, in the power supply system 1, only the UPS 3 can be sequentially replaced (updated) individually while power is being supplied to the load. Therefore, it is not necessary to replace the UPS 3, the distribution board 2, and the input / output board 4 all at once to match the shorter service life of the UPS 3.

[0058] Thus, with power supply system 1, only the necessary equipment needs to be replaced. Considering the long-term operation of power supply system 1, this reduces the number of equipment to be replaced compared to replacing all equipment at once. Therefore, power supply system 1 is more cost-effective than conventional simultaneous replacements and shortens the time required for equipment replacement work.

[0059] <Variation> Next, a modified version of the power supply system 1 will be described. Specifically, a configuration that can further improve the insulation of the connection point of the power system between the uninterruptible power supply 3 and the input / output panel 4 will be described. In the following, the busbar 345U of the uninterruptible power supply 3, the busbar 415U of the input / output panel 4, and the conductor plate 101U of the connecting member 101 will be used as examples. Note that the remaining 16 busbars and the remaining 8 conductor plates have the same configuration as the busbars 345U, 415U and the conductor plate 101U, so their descriptions will not be repeated.

[0060] Figure 8 is a diagram illustrating the insulation treatment of the connection points in the power system. As shown in Figure 8, the busbar 345U of the uninterruptible power supply 3, the busbar 415U of the input / output panel 4, and the conductor plate 101U are covered with an insulating member 900. The insulating member 900 includes two insulating members 910, an insulating member 920, and two insulating members 930.

[0061] Each busbar 345U and 415U is covered on its outer circumference with insulating material 910. The conductor plate 101U is covered on its outer circumference with insulating material 920. The connection points between the busbar 345U and the conductor plate 101U, and the bolts 801 and nuts 802 used to fix the busbar 345U to the conductor plate 101U, are covered with insulating material 930. Similarly, the connection points between the busbar 415U and the conductor plate 101U, and the bolts 801 and nuts 802 used to fix the busbar 415U to the conductor plate 101U, are also covered with insulating material 930.

[0062] Figure 9 shows the state with the insulating member 930 removed. As shown in Figure 9, each busbar 345U, 415U is covered on its outer circumference with insulating member 910, except for the top. The conductor plate 101U is covered on its outer circumference with insulating member 920, except for both sides. Insulating members 910 and 920 are typically heat shrink tubing.

[0063] With this configuration, the insulation between the uninterruptible power supply 3 and the input / output panel 4 can be improved compared to a configuration without the insulating member 900.

[0064] The insulating member 930 (see Figure 8) may be in direct contact with the busbar 415U, the conductor plate 101U, the bolt 801, and the nut 802, or it may be indirectly in contact with them by interposing a metal film or the like.

[0065] Furthermore, although the above description uses an example configuration with insulating member 910, insulating member 920, and insulating member 930, the configuration is not limited to this. A configuration using at least one of the insulating members 910 to 930 is also possible. For example, only insulating member 920 may be used from among insulating members 910 to 930. Even with such a configuration, the insulation between the uninterruptible power supply 3 and the input / output panel 4 can be improved compared to a configuration without insulating member 900.

[0066] The embodiments disclosed herein are illustrative and not limited to those described herein. The scope of the present invention is defined by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0067] 1 Power system, 2 Busbar, 3 Uninterruptible power supply, 4 Input / output panel, 5 Battery, 6,7 Transformer, 8 Wiring, 31,32,33,41,42,43 Circuit, 35,45 Enclosure, 35a,38a,45a,382 Top panel, 36,38,46 Cover, 37 Fan, 47 Communication interface panel, 101,102,103 Connecting components, 101U,101V,101W,102U,102V,102W,103U,103V,103W Conductor board, 311,314,322,331,411,421,431 Circuit breaker, 312 Converter, 313 Inverter, 321 Chopper circuit, 332 Thyristors, 345, 346, 347, 415, 426, 437 Busbar components, 345U, 345V, 345W, 346U, 346V, 346W, 347U, 347V, 347W, 415U, 415V, 415W, 426U, 426V, 426W, 437U, 437V, 437W Busbars, 381 Sidewalls, 801 Bolts, 802 Nuts, 900, 910, 920, 930 Insulating components.

Claims

1. Mother's album and, Power converter and The system comprises an input / output panel electrically connected to the aforementioned master control panel and the aforementioned power converter, The input / output panel includes a first housing and a first busbar member protruding upward from the first housing. The power conversion device includes a second housing and a second busbar member protruding upward from the second housing. A connecting member located above the first and second housings, and electrically connecting the first busbar member and the second busbar member, A power supply system further comprising a cover that covers the first busbar member, the second busbar member, and the connecting member from above, and is detachable from the first and second housings.

2. The power supply system according to claim 1, wherein the connecting member is bolted to the first and second busbar members.

3. The power supply system according to claim 1, wherein the cover has a transparent top surface.

4. The first busbar member and the second busbar member are both used for a three-phase AC input to the power converter, a three-phase AC output from the power converter, or a three-phase bypass input. Each of the first and second busbar members includes a busbar for the U phase of the three phases, a busbar for the V phase of the three phases, and a busbar for the W phase of the three phases. The connecting member includes a first conductor plate for connecting the U-phase busbars, a second conductor plate for connecting the V-phase busbars, and a third conductor plate for connecting the W-phase busbars. The power supply system according to any one of claims 1 to 3, wherein the first conductor plate, the second conductor plate, and the third conductor plate are provided parallel to each other and at different heights.

5. The power supply system according to claim 4, wherein the busbar for the U phase, the busbar for the V phase, the busbar for the W phase, the first conductor plate, the second conductor plate, and the third conductor plate are covered with an insulating member.

6. Multiple power conversion devices, The power supply system according to claim 1, each comprising a plurality of input / output panels connected to the master control panel and to different power conversion devices.

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