Power supply system

Abstract

The present specification relates to a power supply system capable of supplying power uninterruptibly, and relates to a power supply system that is provided with a circuit breaker for controlling each circuit connected to a plurality of power supply devices, and that opens and closes the circuit breaker according to various situations occurring in the system to control the reception and supply of power, thereby being able to perform a UPS function between a plurality of power supply devices.

Description

Technical Field

[0001] The invention relates to a power supply system capable of supplying power uninterruptedly. Background Art

[0002] The background technology of the present invention relates to a system including a plurality of power supply devices.

[0003] A system in which a plurality of power supply devices supply power to various loads can be connected together through a DC bus. When connected to a common bus line in this way, there is an advantage that power can be received and supplied to adjacent power supply devices through the DC bus line. However, when the system is constructed in this way, there are limitations such as system stability problems, difficulty in controlling the reception and supply of power, and lack of response plans when accidents occur.

[0004] Since there are a large number of power supply devices with complex structures, when the compatibility between the devices is poor, the system operation cannot be performed stably. In addition, when the load supplied with power by each device is an important load that needs to be supplied with power at all times, it is necessary to set up a separate UPS device to deal with abnormal conditions. However, when the UPS device is set up, there is a problem that the system structure becomes more complicated, and the setting of the UPS device itself is not easy due to structural / design limitations. Moreover, as the structure becomes more complicated, the control of each device and system will inevitably become more complicated, and the risk of failure and accidents will increase accordingly. As a result, since it is difficult to provide a stable and reliable power supply, the operation of the load will inevitably become unstable, and there is a problem that appropriate operational response measures cannot be made according to the occurrence of various accidents. Summary of the invention

[0005] Problem that the invention aims to solve

[0006] The present invention aims to improve the above-mentioned limitations of the prior art.

[0007] That is, the present specification aims to provide a power supply system that can improve the limitations of the prior art.

[0008] Specifically, the present invention aims to provide a power supply system in which a plurality of power supply modules arranged in the system can receive and supply power, so that each of a plurality of power supply devices can mutually perform UPS functions.

[0009] In addition, it is intended to provide a power supply system capable of effectively maintaining power supply to a load under various abnormal circumstances.

[0010] Furthermore, it is intended to provide a power supply system that can stably and appropriately cope with reception and supply of power according to various abnormal situations.

[0011] Means used to solve problems

[0012] In order to solve the above problems, the power supply system of the present invention provides a circuit breaker for controlling each circuit connected with a plurality of power supply devices, and opens and closes the circuit breaker according to various situations occurring in the system to control the reception and supply of power.

[0013] That is, the technical feature of the power supply system of the present invention is that circuit breakers corresponding to a plurality of power supply devices are provided, and power is received and supplied by controlling the circuit breakers, thereby performing a UPS function between the plurality of power supply devices.

[0014] The above technical features can be applied to and implemented in a power supply system. This specification provides an embodiment of a power supply system having the above technical features.

[0015] In an embodiment of the power supply system of the present invention, which utilizes the above-mentioned technical features as a technical solution to the problem, the system includes: a plurality of power boards, which convert power received from one or more power supply sources into DC power, and convert the DC power into a driving power for a load, so as to supply the driving power to the load; and a plurality of circuit breakers, which are arranged between respective power supply terminals for inputting or outputting the DC power of each of the plurality of power boards, and the plurality of circuit breakers change opening and closing based on the power supply status of one or more of the plurality of power boards, thereby connecting or disconnecting the DC power between the plurality of power boards.

[0016] In one embodiment of the power supply system, the one or more power supply sources may include: a first AC power supply and a second AC power supply for supplying AC power; and a battery power supply storing DC power to supply the stored power to a plurality of the power strips during the period when the power supply of the first AC power supply and the second AC power supply is interrupted and the power supply is restored by switching.

[0017] In an embodiment of the power supply system, the battery power supply may uninterruptedly supply the stored power to the plurality of power strips after the power supply is interrupted until the power supply is restored by switching.

[0018] In one embodiment of the power supply system, one or more of the power supply sources may also include an emergency power supply, which supplies emergency generated power to the load when power supply from the first AC power supply, the second AC power supply and the battery power supply is interrupted.

[0019] In one embodiment of the power supply system, the plurality of power boards may include: one or more first power conversion devices, converting the power received from one or more of the power supply sources into the DC power; and a second power conversion device, converting the DC power received from one or more of the first power conversion devices into the driving power and supplying the driving power to the load.

[0020] In an embodiment of the power supply system, the plurality of power boards may supply the DC power to the second power conversion device through any one of the one or more first power conversion devices according to the status of the one or more power supply sources.

[0021] In one embodiment of the power supply system, when the power supply of the conversion device that supplies the DC power to the second power conversion device is interrupted, a plurality of the power boards can supply the DC power to the second power conversion device through other conversion devices other than the conversion device.

[0022] In one embodiment of the power supply system, the one or more first power conversion devices can supply the DC power to the second power conversion device through a conversion device that receives power from the battery power source during a period when the conversion device switches to the other conversion device.

[0023] In an embodiment of the power supply system, in each of the plurality of power boards, a power terminal of any power board can be connected to each of the power terminals of other power boards.

[0024] In an embodiment of the power supply system, a plurality of the circuit breakers may be disposed between the power terminal of any one of the power boards and each of the power terminals of the other power boards.

[0025] In one embodiment of the power supply system, it may also include a plurality of DC circuits connecting each of the power terminals to each other, and a plurality of circuit breakers may be arranged in each of the plurality of DC circuits to connect or disconnect the DC power supply of each of the plurality of DC circuits.

[0026] In one embodiment of the power supply system, the plurality of circuit breakers may have a number corresponding to the number when the power terminal of any one of the plurality of power boards is connected to each of the power terminals of the other power boards.

[0027] In an embodiment of the power supply system, when the number of the power boards is N, the number of the circuit breakers may be N(N-1) / 2.

[0028] In one embodiment of the power supply system, the plurality of circuit breakers may be closed when the DC power source between the plurality of power boards is connected, and may be open when the DC power source between the plurality of power boards is disconnected.

[0029] In one embodiment of the power supply system, among the plurality of circuit breakers, when the power supply to more than one of the plurality of power boards is interrupted, the circuit breakers arranged between the power board whose power supply is interrupted and the power board adjacent to the interrupted power board can form a closed circuit to connect the interrupted power board and the adjacent power board, so that the DC power is supplied from the adjacent power board to the interrupted power board.

[0030] In one embodiment of the power supply system, the DC power supply of the interrupted power board can be provided by a conversion device connected to the battery power supply from the time when the power supply of the interrupted power board is interrupted until the DC power conducted from the adjacent power board is supplied.

[0031] In one embodiment of the power supply system, it may also include a control device, which monitors the status of at least one of the plurality of power boards and the plurality of circuit breakers, and controls at least one of the plurality of power boards and the plurality of circuit breakers according to the monitoring result.

[0032] In addition, another embodiment of the power supply system of the present invention that utilizes the above-mentioned technical features as a technical solution to the problem includes: a plurality of power boards that convert power received from each of more than one power supply source into DC power, convert the DC power into a driving power for driving a load, and supply the driving power to the load; a plurality of DC circuits that are commonly connected to the output terminals from which the DC power flows out of each of the plurality of power boards, thereby transmitting the DC power output from each of the plurality of power boards; a plurality of circuit breakers that are arranged in each of the plurality of DC circuits whose output terminals are connected to each other between the plurality of power boards, thereby controlling the connection between the plurality of power boards; and a control device that controls the opening and closing of the plurality of circuit breakers according to the state of each of the plurality of power boards, thereby controlling the reception and supply of the DC power between the plurality of power boards through the plurality of DC circuits.

[0033] In an embodiment of the power supply system, the plurality of power boards each include: an output terminal for outputting the DC power supply can be connected to any three circuit breakers among the plurality of circuit breakers.

[0034] In an embodiment of the power supply system, among the plurality of power boards, an output terminal of any one of the power boards can be connected to each of the output terminals of the other power boards.

[0035] In one embodiment of the power supply system, in a plurality of the power boards, any one of the one or more first power conversion devices for converting into the DC power supply can be selected according to the state of the one or more power supply sources, and the DC power can be transmitted to each of the second power conversion devices for converting into the driving power supply through the rotating converter.

[0036] In one embodiment of the power supply system, in a plurality of the power boards, in the event that an abnormality occurs in any one or more of the converter that is transmitting the DC power to the second power conversion device for converting the DC power into the driving power and the power supply source corresponding to the converter, the DC power can be transmitted to the second power conversion device through other converters other than the converter.

[0037] In one embodiment of the power supply system, when an abnormality occurs in any one or more of the multiple power boards, the control device can perform the following control to close the circuit breaker of any one of the circuits connected to the power board where the abnormality occurs and the power board adjacent to the power board where the abnormality occurs, so that the power board where the abnormality occurs receives the DC power from the adjacent power board.

[0038] As described above, the power supply system of the present invention can be applied to and implemented in a power supply device, a power supply system, and an operating method of a power supply system that supplies / uses a DC power supply. In particular, it can be usefully applied to a DC UPS module and a power supply system having the module. However, the technology disclosed in this specification is not limited to this, and can be applied to and implemented in all power supply devices, power supply devices, power control devices, power supply systems, power systems, power control systems, equipment systems, equipment control methods, energy storage systems, control methods or operating methods of energy storage systems, motor control boards for controlling multiple motor loads, motor control systems, motor operation systems, etc.

[0039] Effects of the Invention

[0040] In the power supply system of the present invention, the reception and supply of power are controlled by controlling the circuit breaker of each of a plurality of power supply devices connected to each other, thereby having the effect of being able to perform UPS functions between a plurality of power supply devices.

[0041] Therefore, even when various abnormal situations occur in the system, the power supply to the load can be maintained uninterruptedly.

[0042] That is, the power supply system of the present invention has the effect of being able to appropriately and stably cope with power supply in response to various abnormal situations occurring in the system.

[0043] In addition, in the power supply system of the present invention, the circuit breaker of each of the plurality of power supply devices connected to each other is controlled according to the situation that occurs, thereby controlling the reception and supply of power, thereby achieving efficient operation with a minimum of units.

[0044] Furthermore, the power supply system of the present invention has the effect of being able to increase the stability, reliability and availability of large-capacity system operations.

[0045] As a result, the power supply system of the present invention solves the above-mentioned problems, thereby having the effect of improving the limitations of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural diagram showing the structure of the power supply system of the present invention.

[0047] Figure 2 It is a structural diagram showing the structure of a power board of the power supply system of the present invention.

[0048] Figure 3 It is a structural diagram showing the specific structural configuration of a power board of the power supply system of the present invention.

[0049] Figure 4 This is an example showing a specific embodiment of the power supply system of the present invention. Figure 1 .

[0050] Figure 5 This is an example showing a specific embodiment of the power supply system of the present invention. Figure 2 .

[0051] Figure 6 This is an example showing a specific embodiment of the power supply system of the present invention. Figure 3 .

[0052] Figure 7 This is an example showing a specific embodiment of the power supply system of the present invention. Figure 4 . DETAILED DESCRIPTION

[0053] It should be noted that the technical terms used in this specification are only used to illustrate specific embodiments and are not intended to limit the technical ideas disclosed in this specification. In addition, unless otherwise defined in this specification, the technical terms used in this specification should be interpreted in the sense that ordinary technicians in the field of the technology disclosed in this specification generally understand, and should not be interpreted as overly comprehensive or oversimplified meanings. In addition, when the technical terms used in this specification are incorrect technical terms that cannot correctly express the technical ideas disclosed in this specification, they should be replaced with technical terms that can be correctly understood by those skilled in the art. In addition, the general terms used in this specification should be interpreted according to the definition in the dictionary or the context before and after, and should not be interpreted in an overly simplified meaning.

[0054] In addition, unless the context clearly dictates otherwise, singular expressions used in this specification include plural expressions. In this specification, terms such as "consisting of" or "comprising" should not be interpreted as including all the various constituent elements or steps described in the specification, may not include some constituent elements or steps, or should be interpreted as further including other constituent elements or steps.

[0055] Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings. In addition, the same or similar components are denoted by the same reference numerals regardless of the reference numerals, and repeated description thereof will be omitted.

[0056] In addition, if it is determined that the specific description of the relevant known technology will cause confusion to the technical ideas disclosed in this specification, the detailed description will be omitted. In addition, the attached drawings are only for easy understanding of the technical ideas disclosed in this specification, and the technical ideas disclosed in this invention should not be limited by the attached drawings.

[0057] Hereinafter, embodiments of the power supply system of the present invention will be described.

[0058] The power supply system may be implemented in a combination or separation of the following embodiments.

[0059] The power supply system may be a power supply system including a plurality of power supply devices.

[0060] The power supply system may be a power supply system including a plurality of packaged power devices.

[0061] Here, the power supply device may be a power board encapsulating a plurality of power supply control devices.

[0062] like Figure 1As shown, the power supply system 1000 includes: a plurality of power boards 100, 200, 300, 400, which convert the power received from one or more power supply sources 10 into DC power, and convert the DC power into a driving power for a load 20, and supply the driving power to the load 20; a plurality of circuit breakers 130, which are arranged between each of the plurality of power boards 100, 200, 300, 400 and each of the power supply terminals for inputting and outputting the DC power, and the plurality of circuit breakers 130 change opening and closing according to the power supply status of one or more of the plurality of power boards 100, 200, 300, 400, thereby connecting or disconnecting the DC power between the plurality of power boards 100, 200, 300, 400.

[0063] Here, each of the plurality of power boards 100, 200, 300, 400 may be as follows: Figure 2 and Figure 3 The power supply device 100 is shown.

[0064] That is, the power board 100 can form a stomach Figure 2 and Figure 3 The power supply device shown in FIG. 1 may include a plurality of Figure 2 and Figure 3 The power supply device 100 shown is in the form of a power strip, and thus may include a plurality of the power strips 100 , 200 , 300 , 400 .

[0065] The power board 100 may be a module including a plurality of power control devices.

[0066] The power board 100 may be a power device encapsulating a plurality of the power control devices.

[0067] For example, it may be a power board encapsulating a plurality of the power control devices.

[0068] The power board 100 may be a packaged power board installed in a building requiring high power, such as a power plant, equipment, factory, building, apartment, etc., to supply power.

[0069] The power board 100 may also be a packaged power board constructed in any space.

[0070] A plurality of the power control devices may be packaged in the power board 100 to supply power to a load.

[0071] like Figure 2As shown, the power board 100 may include: one or more first power conversion devices 110, which convert the power received from each of the one or more power supply sources 10 into the DC power; one or more second power conversion devices 120, which convert the DC power into the driving power for driving the load 20 and supply the driving power to the load 20; and control units 140, 240, 340, 440, which control the reception and supply of the DC power according to the state of the DC power or the driving power.

[0072] As described above, the power board 100 includes the first power conversion device 110, the second power conversion device 120 and the control unit 140, 240, 340, 440 to convert the power received from one or more of the power supply sources 10 into the driving power and supply the driving power to the load 20.

[0073] The specific structure of the power board 100 including the first power conversion device 110, the second power conversion device 120 and the control units 140, 240, 340, 440 can be as follows: Figure 2 and Figure 3 shown.

[0074] The one or more power supply sources 10 that supply power to the power board 100 may be externally connected to the one or more first power conversion devices 110 , and may supply power to each of the one or more first power conversion devices 110 .

[0075] Each of the one or more power supply sources 10 may be connected to each of the one or more first power conversion devices 110 , and may supply DC or AC power to each of the one or more first power conversion devices 110 .

[0076] like Figure 2 and Figure 3 As shown, the one or more power supply sources 10 may include a first alternating current power source 10 # 1 and a second alternating current power source 10 # 3 for supplying AC power, and a battery power source 10 # 2 for storing DC power.

[0077] Here, the first AC power source 10#1 may be a main system power source G that supplies AC power, the second AC power source 10#3 may be a bypass system power source P that supplies AC power, and the battery power source 10#2 may be a battery power source B that supplies DC power.

[0078] That is, Figure 4 As shown, the one or more power supply sources 10 may include a system power G, a bypass power P, and a battery power B.

[0079] Therefore, each of the plurality of power boards 100 , 200 , 300 , 400 may receive power from each of the system power G, the bypass power P, and the battery power B.

[0080] The first AC power source 10#1 may be a system power source G.

[0081] The first AC power source 10#1 may be a system power source G that supplies 440 [V] AC power.

[0082] The second AC power source 10#3 may be a bypass power source P.

[0083] The second AC power source 10#3 may be a bypass power source P that supplies 440 [V] AC power.

[0084] The battery power source 10#2 may be an emergency battery that stores DC power so as to supply the stored DC power in an emergency.

[0085] When an abnormality occurs in the first AC power source and the second AC power source, the battery power source 10 # 2 may supply the stored DC power to the power board 100 .

[0086] The DC power supply is stored in the battery power supply B, and when the power supply of the first AC power supply 10#1 and the second AC power supply 10#3 is interrupted, the power stored in the battery power supply B can be supplied to the plurality of power boards 100, 200, 300, 400 during the period when the power supply is restored by switching.

[0087] The battery power source B may uninterruptedly supply the stored power to the plurality of power strips 100, 200, 300, 400 after the power supply is interrupted until the power supply is restored by switching.

[0088] One or more of the power supply sources 10 may also include an emergency power supply A, which supplies emergency generated power to the load 20 when the power supply of the first AC power supply G, the second AC power supply P and the battery power supply B is interrupted.

[0089] When an abnormality occurs in the first AC power source G, the second AC power source P, and the battery power source B, the emergency power source A can supply emergency generated power to the load 20 .

[0090] The emergency power supply A can be an emergency power supply for each of the loads 20 when the first AC power supply G, the second AC power supply P, and the battery power supply B that supply power to each of the plurality of power boards 100, 200, 300, 400 all malfunction and fail to supply power, so as to keep the loads 20 driven within a specified time.

[0091] For example, the emergency power supply A may be a power supply including an emergency generator.

[0092] Preferably, each of the plurality of power boards 100, 200, 300, 400 can be as follows Figure 4 As shown, it receives power from three power supply sources 10, namely, the system power supply G, the bypass power supply P and the battery power supply B, and can receive power from the emergency power supply A even when the system power supply G, the bypass power supply P and the battery power supply B are unable to supply power.

[0093] Here, each of the more than one power supply sources 10 that supplies power to each of the plurality of power strips 100, 200, 300, 400 can supply power to each of the plurality of power strips 100, 200, 300, 400 in one system, or can supply power to each of the plurality of power strips 100, 200, 300, 400 from each of the separate distribution boards through separate distribution boards.

[0094] Each of the plurality of power boards 100, 200, 300, 400 may include: one or more of the first power conversion devices 110, 210, 310, 410, which convert the power received from one or more of the power supply sources 10 into the DC power; and the second power conversion devices 120, 220, 320, 420, which convert the DC power received from one or more of the first power conversion devices 110, 210, 310, 410 into the driving power and supply it to the load 20.

[0095] Here, at least one of the first power conversion devices 110 , 210 , 310 , 410 and the second power conversion devices 120 , 220 , 320 , 420 may be formed in plural.

[0096] Each of the plurality of power boards 100, 200, 300, 400 can supply the DC power to the one or more second power conversion devices 120, 220, 320, 420 through any one of the one or more first power conversion devices 110, 210, 310, 410 based on the one or more power supply sources 10.

[0097] The first power conversion device 110 , 210 , 310 , 410 is a device for converting received power into DC power, for example, may be a converter.

[0098] The first power conversion device 110 , 210 , 310 , 410 may be an AC / DC converter that converts AC power into DC power, or may be a DC / DC converter that converts DC power into DC power.

[0099] One or more of the first power conversion devices 110 , 210 , 310 , 410 may include one or more of an AC / DC converter that converts AC power into DC power and a DC / DC converter that converts the level of DC power.

[0100] The one or more first power conversion devices 110 , 210 , 310 , 410 may correspond to each of the one or more power supply sources 10 and include three conversion devices 110 # 1 to # 3 , 210 # 1 to # 3 , 310 # 1 to # 3 , 410 # 1 to # 3 .

[0101] One or more of the first power conversion devices 110, 210, 310, 410 may include first to third conversion devices 110#1 to #3, 210#1 to #3, 310#1 to #3, 410#1 to #3, wherein the first to third conversion devices 110#1 to #3, 210#1 to #3, 310#1 to #3, 410#1 to #3 are connected to each of the first AC power source 10#1, the battery power source 10#2 and the second AC power source 10#3, and receive power from the connected power supply source.

[0102] Thus, the first AC power supply 10#1 can be connected to the first conversion device 110#1, 210#1, 310#1, 410#1, and supply AC power to the first conversion device 110#1, 210#1, 310#1, 410#1, the battery power supply 10#2 can be connected to the second conversion device 110#2, 210#2, 310#2, 410#2, and supply DC power to the second conversion device 110#2, 210#2, 310#2, 410#2, and the second AC power supply 10#3 can be connected to the third conversion device 110#3, 210#3, 310#3, 410#3, and supply AC power to the third conversion device 110#3, 210#3, 310#3, 410#3.

[0103] The first conversion device 110#1, 210#1, 310#1, 410#1 can be an AC / DC converter that converts AC power into DC power, the second conversion device 110#2, 210#2, 310#2, 410#2 can be a DC / DC converter that converts the level of DC power, and the third conversion device 110#3, 210#3, 310#3, 410#3 can be an AC / DC converter that converts AC power into DC power.

[0104] Each of the one or more first power conversion devices 110 , 210 , 310 , 410 may include a switching unit for opening and closing the connection at each of the front end and the rear end.

[0105] The opening and closing unit may be arranged at each of the input and output ends of each of the one or more first power conversion devices 110, 210, 310, 410 to control the switching of the power input to and output from the one or more first power conversion devices 110, 210, 310, 410.

[0106] Here, the switching unit provided at the input end may be a circuit breaker that detects overcurrent and cuts off a circuit.

[0107] More specifically, an AC universal circuit breaker (ACB: Air Circuit Breaker) can be provided at the input end of the first conversion device 110#1, 210#1, 310#1, 410#1 and the third conversion device 110#3, 210#3, 310#3, 410#3 that receive AC power from the first AC power source 10#1 and the second AC power source 10#3, and a DC distribution circuit breaker (MCCB: Molded Circuit Breaker) can be provided at the input end of the second conversion device 110#2, 210#2, 310#2, 410#2 that receives DC power from the battery power source 10#2.

[0108] The switching unit may switch on and off the connection of one or more first power conversion devices 110 , 210 , 310 , 410 according to the operation of one or more first power conversion devices 110 , 210 , 310 , 410 .

[0109] For example, when power is not received from one or more of the power supply sources 10, the switch units respectively arranged at the input end and the output end form an open circuit, so that the connection of the corresponding conversion device can be disconnected.

[0110] The output terminals of one or more of the first power conversion devices 110 , 210 , 310 , 410 may be connected to a power terminal O1 , O2 , O3 , O4 .

[0111] That is, the output ends of more than one of the first power conversion devices 110, 210, 310, 410 can be commonly connected to the power supply ends O1, O2, O3, O4, so that the DC power converted by more than one of the first power conversion devices 110, 210, 310, 410 flows through the power supply ends O1, O2, O3, O4.

[0112] Therefore, the power supply terminals O1, O2, O3, and O4 can be commonly connected to the output terminals of more than one of the first power conversion devices 110, 210, 310, and 410, so that the DC power output from more than one of the first power conversion devices 110, 210, 310, and 410 flows through the circuit.

[0113] The power terminals O1 , O2 , O3 , O4 may be connected to each of the power terminals 01 , 02 , 03 , 04 of other power boards and the input terminals of the second power conversion devices 120 , 220 , 320 , 420 .

[0114] The power terminals O1, O2, O3, O4 can be connected to each of the other power boards 100, 200, 300, 400 by being connected to each of the power terminals 01, 02, 03, 04 of the other power boards.

[0115] The power terminals O1, O2, O3, O4 are connected to each of the power terminals 01, 02, 03, 04 of the other power boards 100, 200, 300, 400 and the input terminal of each of the second power conversion devices 120, 220, 320, 420, so that the DC power can be transmitted to the other power boards 100, 200, 300, 400, or can be transmitted to the second power conversion devices 120, 220, 320, 420.

[0116] The power terminals O1 , O2 , O3 , and O4 may be connected to any three circuit breakers among the plurality of circuit breakers 130 .

[0117] That is, the power terminals O1, O2, O3, O4 can control the connection between the power terminals O1, O2, O3, O4 through any three circuit breakers connected to the power terminals O1, O2, O3, O4.

[0118] Thus, the DC power transmitted between the power terminals O1, O2, O3, O4 can be controlled by the circuit breakers connected to the power terminals O1, O2, O3, O4.

[0119] As described above, the power supply terminals O1, O2, O3, O4 commonly connected to the output terminals of more than one of the first power conversion devices 110, 210, 310, 410 are connected to each of the power supply terminals 01, 02, 03, 04 of the other power boards 100, 200, 300, 400 and the input terminals of the second power conversion devices 120, 220, 320, 420, thereby, the DC power converted and output by more than one of the first power conversion devices 110, 210, 310, 410 can be transmitted through the power supply terminals O1, O2, O3, O4.

[0120] The DC power converted and output by one or more of the first power conversion devices 110 , 210 , 310 , 410 may be transmitted to the second power conversion device 120 , 220 , 320 , 420 .

[0121] One or more of the first power conversion devices 110, 210, 310, 410 can supply the DC power to the second power conversion devices 120, 220, 320, 420 by operating any one of the first to third conversion devices 110#1 to 110#3, 210#1 to 210#3, 310#1 to 310#3, 410#1 to 410#3.

[0122] When the power supply of the conversion devices 110#1 to #3, 210#1 to #3, 310#1 to #3, 410#1 to #3 that supply the DC power to the second power conversion devices 120, 220, 320, 420 is interrupted, the plurality of power boards 100, 200, 300, 400 can supply the DC power to the second power conversion devices 120, 220, 320, 420 through other conversion devices except the conversion devices 110#1 to #3, 210#1 to #3, 310#1 to #3, 410#1 to #3.

[0123] When the power supply of conversion devices 110#1 to #3, 210#1 to #3, 310#1 to #3, 410#1 to #3 that supply the DC power to the second power conversion devices 120, 220, 320, 420 is interrupted, one or more of the first power conversion devices 110, 210, 310, 410 can supply the DC power to the second power conversion devices 120, 220, 320, 420 through conversion devices 110#2, 210#2, 310#2, 410#2 that receive power from the battery power supply 10#2 during the period when the conversion devices 110#1 to #3, 210#1 to #3, 310#1 to #3, 410#1 to #3 are switched to the other conversion devices.

[0124] Here, the situation in which the power supply of the conversion devices 110#1 to #3, 210#1 to #3, 310#1 to #3, 410#1 to #3 is interrupted may be a situation in which an abnormal condition is detected in any one or more of the conversion devices 110#1 to #3, 210#1 to #3, 310#1 to #3, 410#1 to #3, the supply source connected to the conversion devices 110#1 to #3, 210#1 to #3, 310#1 to #3, 410#1 to #3, and the rated value of the DC power supply.

[0125] For example, in the process of the first conversion device 110#1, 210#1, 310#1, 410#1 connected to the first AC power supply 10#1 supplying the DC power to the second power conversion device 120, 220, 320, 420, when the rated value of the DC power output from the first conversion device 110#1, 210#1, 310#1, 410#1 decreases below the specified reference, the DC power can be supplied to the second power conversion device 120 by the third conversion device 110#3, 210#3, 310#3, 410#3 which is a conversion device other than the first conversion device 110#1, 210#1, 310#1, 410#1.

[0126] In this case, during the period when the first conversion device 110#1, 210#1, 310#1, 410#1 switches to the third conversion device 110#3, 210#3, 310#3, 410#3, the one or more first power conversion devices 110, 210, 310, 410 can supply the DC power to the second power conversion device 120, 220, 320, 420 through the second conversion device 110#2, 210#2, 310#2, 410#2 connected to the battery power supply 10#2.

[0127] That is, when the supply of the DC power supply to the second power conversion device 120, 220, 320, 420 is interrupted, the second conversion device 110#2, 210#2, 310#2, 410#2 connected to the battery power supply 10#2 can supply the DC power supply to the second power conversion device 120, 220, 320, 420 until the supply of the DC power supply is restored by switching.

[0128] The second power conversion device 120 , 220 , 320 , 420 may be formed in plural.

[0129] The second power conversion device 120 , 220 , 320 , 420 is a device for converting the received DC power into the driving power, and may be an inverter, for example.

[0130] When the load is a load driven by an AC power source, the second power conversion device 120 , 220 , 320 , 420 may be an inverter that converts a DC power source received from one or more of the first power conversion devices 110 , 210 , 310 , 410 into an AC driving power source.

[0131] When the load is a load driven by a DC power source, the second power conversion device 120 , 220 , 320 , 420 may be an inverter that converts the DC power received from one or more of the first power conversion devices 110 , 210 , 310 , 410 into a DC driving power source.

[0132] The second power conversion devices 120 , 220 , 320 , 420 may be provided in a number corresponding to the number of the loads 20 .

[0133] The load 20 may be formed in plural.

[0134] The second power conversion device 120 , 220 , 320 , 420 may include three or more inverters 120 # 1 to # 3 , 220 # 1 to # 3 , 320 # 1 to # 3 , 420 # 1 to # 3 corresponding to the load 20 .

[0135] Each of the second power conversion devices 120 , 220 , 320 , and 420 may be connected to a respective load 20 , and may supply the driving power to the connected load.

[0136] Each of the second power conversion devices 120 , 220 , 320 , 420 may include a switching unit for opening and closing the connection at a front end.

[0137] The switching unit may be provided at an input terminal of each of the second power conversion devices 120 , 220 , 320 , 420 to control switching of power input to the second power conversion devices 120 , 220 , 320 , 420 .

[0138] Here, the switching unit provided at the input end may be a circuit breaker that detects overcurrent and cuts off a circuit.

[0139] The driving power converted and output by the second power conversion device 120 , 220 , 320 , 420 may be transmitted to each of the loads 20 .

[0140] Here, the load 20 may include a motor M load.

[0141] In each of the plurality of power boards 100 , 200 , 300 , 400 , the power terminals O1 to O4 may be connected to each of the power terminals O1 to O4 of other power boards 100 , 200 , 300 , 400 .

[0142] In each of the plurality of power boards 100 , 200 , 300 , 400 , the power terminals O1 to O4 of any one power board may be connected to each of the power terminals O1 to O4 of the other power boards 100 , 200 , 300 , 400 .

[0143] In the plurality of power boards 100 , 200 , 300 , 400 , the plurality of circuit breakers 130 may be respectively arranged between the power terminals O1 to O4 of any one power board and the power terminals O1 to O4 of the other power boards 100 , 200 , 300 , 400 .

[0144] The plurality of circuit breakers 130 may be respectively disposed between the power terminals O1 to O4 of any one power board and the power terminals O1 to O4 of the other power boards.

[0145] As described above, the system 1000 in which the power supply terminals O1 to O4 are interconnected also includes a plurality of DC circuits 1 for connecting each of the power supply terminals O1 to O4 to each other, and a plurality of circuit breakers 130 are respectively configured in the plurality of DC circuits 1, so that the DC power supply can be connected or interrupted in each of the plurality of DC circuits 1.

[0146] The power terminals O1 to O4 of each of the plurality of power boards 100 , 200 , 300 , 400 may be connected to the plurality of circuit breakers 130 - 130 a to 130 f configured in each of the plurality of DC circuits 1 .

[0147] In each of the plurality of power boards 100 , 200 , 300 , 400 , the power terminals O1 to O4 outputting the DC power may be connected to any three circuit breakers among the plurality of circuit breakers 130 .

[0148] That is, the power terminals O1 to O4 of each of the plurality of power boards 100 , 200 , 300 , 400 may be connected to three circuit breakers.

[0149] For example, when a plurality of the power boards 100, 200, 300, 400 are Figure 1 When four are shown, the first power strip 100 can be connected to the first circuit breaker 130a, the second circuit breaker 130b and the third circuit breaker 130c, the second power strip 200 can be connected to the second circuit breaker 130b, the fourth circuit breaker 130d and the sixth circuit breaker 130f, the third power strip 300 can be connected to the first circuit breaker 130a, the fourth circuit breaker 130d and the fifth circuit breaker 130e, and the fourth power strip 400 can be connected to the fourth circuit breaker 130d, the fifth circuit breaker 130e and the sixth circuit breaker 130f.

[0150] Therefore, each of the plurality of circuit breakers 130 may be connected to two power boards.

[0151] For example, the first circuit breaker 130a can be connected to the first power board 100 and the third power board 300, the second circuit breaker 130b can be connected to the first power board 100 and the second power board 200, the third circuit breaker 130c can be connected to the first power board 100 and the fourth power board 400, the fourth circuit breaker 130d can be connected to the second power board 200 and the third power board 300, the fifth circuit breaker 130e can be connected to the third power board 300 and the fourth power board 400, and the sixth circuit breaker 130f can be connected to the second power board 200 and the fourth power board 400.

[0152] In the plurality of power boards 100 , 200 , 300 , 400 , the power terminal of any one power board can be connected to each of the power terminals of other power boards.

[0153] That is, a plurality of the power strips 100, 200, 300, 400 may be connected to each of the other power strips.

[0154] For example, the first power board 100 is connected to the third power board 300 through the first circuit breaker 130a, connected to the second power board 200 through the second circuit breaker 130b, and connected to the fourth power board 400 through the third circuit breaker 130c, so that it can be connected to each of the second to fourth power boards 200, 300, and 400.

[0155] In addition, the second power strip 200 is connected to the first power strip 100 through the second circuit breaker 130b, connected to the third power strip 300 through the fourth circuit breaker 130d, and connected to the fourth power strip 400 through the sixth circuit breaker 130f, so that it can be connected to each of the first power strip 100, the third and fourth power strips 300 and 400.

[0156] In addition, the third power board 300 is connected to the first power board 100 through the first circuit breaker 130a, connected to the second power board 200 through the fourth circuit breaker 130d, and connected to the fourth power board 400 through the fifth circuit breaker 130e, so that it can be connected to each of the first power board 100, the second and fourth power boards 200 and 400.

[0157] In addition, the fourth power board 400 is connected to the first power board 100 through the second circuit breaker 130b, connected to the third power board 300 through the fifth circuit breaker 130e, and connected to the second power board 200 through the sixth circuit breaker 130f, so that it can be connected to each of the first power board 100, the second and third power boards 200 and 300.

[0158] The plurality of circuit breakers 130 connected to the power terminals O1 to O4 may be DC circuit breakers for cutting off a DC power source.

[0159] Each of the power terminals O1 to O4 may be connected to any three of the circuit breakers 130 disposed in the DC circuits 1 .

[0160] The circuit breakers 130 may be provided in each of the circuits connected to the power terminals O1 to O4 of each of the power boards 100 , 200 , 300 , 400 in the DC circuit 1 to control the connection between the power boards 100 , 200 , 300 , 400 .

[0161] The plurality of circuit breakers 130 may be provided on respective circuits connected to the power supply terminals O1 to O4 connected to the output terminal of each of the first power conversion devices 110, 210, 310, 410 of the plurality of power boards 100, 200, 300, 400.

[0162] That is, the plurality of circuit breakers 130 may be provided in each of the power terminals O1 to O4 to control the connection between the plurality of power boards 100 , 200 , 300 , 400 .

[0163] Thus, the plurality of power boards 100 , 200 , 300 , 400 can be connected to each other through the plurality of DC circuits 1 connected to the power sources O1 to O4 , and the connection between the plurality of power boards 100 , 200 , 300 , 400 can be controlled by opening and closing the plurality of circuit breakers 130 .

[0164] The plurality of circuit breakers 130 that connect or disconnect the power terminals O1 to O4 and the plurality of DC circuits 1 by being configured on each of the plurality of DC circuits 1 each connected to the power terminals O1 to O4 may be a DC dedicated distribution circuit breaker (MCCB).

[0165] The plurality of circuit breakers 130 can change opening and closing according to at least one state of the DC power supply, the driving power supply, one or more of the first power conversion devices 110, 210, 310, 410 and the load 20, thereby connecting or disconnecting the DC power supply between each end of the power supply terminals O1 to O4 connected to each other.

[0166] Here, the at least one state may be at least one of a situation where the DC power supply is changed from an initial state, a situation where the driving power supply is changed from an initial state, a situation where the power supply state of one or more of the first power conversion devices 110, 210, 310, 410 is changed, and a situation where the driving state of the load 20 is changed.

[0167] For example, the DC power supply or the driving power supply may fall below a reference rated value, one or more of the first power conversion devices 110, 210, 310, 410 may fail / accidentally cause the power supply state to be changed, or the driving power supplied to the load 20 may be reduced, causing the driving state of the load 20 to be changed.

[0168] The plurality of DC circuits 1 may be a DC bus through which a DC power source flows.

[0169] The plurality of DC circuits 1 may refer to a DC dedicated circuit in which a plurality of power supply sources are connected together to transmit power.

[0170] The plurality of DC circuits 1 are connected to a plurality of DC power supply sources, so that the DC power supplied from the plurality of DC power supply sources can be transmitted.

[0171] For example, by connecting the power terminals O1 to O4 of each of the plurality of power boards 100 , 200 , 300 , 400 , the DC power may be transmitted between the plurality of power boards 100 , 200 , 300 , 400 .

[0172] Preferably, the plurality of DC circuits 1 may have a rating ranging from the size of the DC power supplied from one conversion device to the size of the DC power supplied from two conversion devices.

[0173] That is, the rating of the plurality of DC circuits 1 may be a rating capable of transmitting the DC power supplied from the two conversion devices.

[0174] The plurality of DC circuits 1 may allow the DC power to flow therethrough according to the opening and closing of the plurality of circuit breakers 130 .

[0175] The DC power source may be allowed to be turned on in the plurality of DC circuits 1 according to the opening and closing actions of the plurality of circuit breakers 130 .

[0176] The plurality of DC circuits 1 may connect each of the power supply terminals O1 to O4 to each other, so that the connections between the power supply terminals O1 to O4 form a mesh.

[0177] That is, the power terminals O1 to O4 of each of the plurality of power boards 100, 200, 300, 400 can be connected to the plurality of DC circuits 1 that connect each of the power terminals O1 to O4 to each other to form the mesh, thereby making the power terminals O1 to O4 of each of the plurality of power boards 100, 200, 300, 400 connected into a mesh.

[0178] The plurality of DC circuits 1 may be composed of a plurality of circuits formed by connecting the power terminals O1 to O4 of any one of the plurality of power boards 100 , 200 , 300 , 400 to each of the power terminals O1 to O4 of the other power boards.

[0179] For example, it can be composed of a first circuit connecting the first power board 100 and the third power board 100, a second circuit connecting the first power board 100 and the second power board 200, a third circuit connecting the first power board 100 and the fourth power board 400, a fourth circuit connecting the second power board 200 and the third power board 300, a fifth circuit connecting the third power board 300 and the fourth power board 400, and a sixth circuit connecting the second power board 200 and the fourth power board 400, and the first to sixth circuits can be formed into a mesh.

[0180] Here, the first circuit breaker 130a is set in the first circuit, the second circuit breaker 130b is set in the second circuit, the third circuit breaker 130c is set in the third circuit, the fourth circuit breaker 130d is set in the fourth circuit, the fifth circuit breaker 130e is set in the fifth circuit, and the sixth circuit breaker 130f is set in the sixth circuit, thereby respectively controlling the opening and closing of the first to sixth circuits.

[0181] Therefore, the plurality of circuit breakers 130 may control the connection between the plurality of power boards 100 , 200 , 300 , 400 through the plurality of DC circuits 1 formed into a mesh by the plurality of circuits.

[0182] The plurality of circuit breakers 130 may have a number corresponding to each connection between the power terminals of any one of the plurality of power boards 100 , 200 , 300 , 400 and the power terminals of the other power boards.

[0183] That is, the power terminals of any one power board can be connected to each of the power terminals of other power boards.

[0184] When the number of the power boards 100 , 200 , 300 , and 400 is N, the number of the circuit breakers 130 may be N(N−1) / 2.

[0185] For example, when the number of the power boards 100 , 200 , 300 , and 400 is four, that is, when N is 4, it can be deduced from 4(4-1) / 2 that there are six power boards.

[0186] Each of the plurality of circuit breakers 130 is normally open, and is closed when in operation, so as to control the connection between the plurality of power boards 100 , 200 , 300 , 400 .

[0187] Therefore, each of the plurality of power strips 100 , 200 , 300 , 400 may be connected to other power strips by opening and closing each of the plurality of circuit breakers 130 .

[0188] When the DC power source is connected between the plurality of power boards 100, 200, 300, 400, the plurality of circuit breakers 130 may form a closed circuit, and when the DC power source is disconnected between the plurality of power boards 100, 200, 300, 400, the DC power source may form an open circuit.

[0189] Each of the plurality of power boards 100, 200, 300, 400 may be connected to other power boards via the plurality of circuit breakers 130 in the following manner: Figure 1 shown.

[0190] like Figure 1 As shown, the first power board 100, among the plurality of power boards 100, 200, 300, 400, the power terminals O1 to O4 of each of the second power board 200, the third power board 300 and the fourth power board 400 are connected to the plurality of DC circuits 1, and the first to sixth circuit breakers 130a to 130f can be respectively arranged between the power terminals O1 to O4 of each of the plurality of power boards 100, 200, 300, 400 connected to the plurality of DC circuits 1.

[0191] Reference Figure 1 The connection form is described in more detail below.

[0192] The first power terminal O1 of the first power board 100 is connected to a plurality of the DC circuits 1, thereby being connected to the second power terminal O2 of the second power board 200, the third power terminal O3 of the third power board 300 and the fourth power terminal O4 of the fourth power board 400, and the second circuit breaker 130b is arranged between the first and second power terminals O1 and O2, the first circuit breaker 130a is arranged between the first and third power terminals O1 and O3, and the third circuit breaker 130c is arranged between the first and fourth power terminals O1 and O4, the connection between the first and second power boards 100 and 200 can be controlled by the second circuit breaker 130b, the connection between the first and third power boards 100 and 300 can be controlled by the first circuit breaker 130a, and the connection between the first and fourth power boards 100 and 400 can be controlled by the third circuit breaker 130c.

[0193] The second power terminal O2 of the second power board 200 is connected to a plurality of the DC circuits 1, thereby being connected to the first power terminal O1 of the first power board 100, the third power terminal O3 of the third power board 300 and the fourth power terminal O4 of the fourth power board 400, and the second circuit breaker 130b is arranged between the first and second power terminals O1 and O2, the fourth circuit breaker 130d is arranged between the second and third power terminals O2 and O3, and the sixth circuit breaker 130f is arranged between the second and fourth power terminals O2 and O4, thereby, the connection between the first and second power boards 100 and 200 can be controlled by the second circuit breaker 130b, the connection between the second and third power boards 200 and 300 can be controlled by the fourth circuit breaker 130d, and the connection between the second and fourth power boards 200 and 400 can be controlled by the sixth circuit breaker 130f.

[0194] The third power terminal O3 of the third power board 300 is connected to a plurality of the DC circuits 1, thereby being connected to the first power terminal O1 of the first power board 100, the second power terminal O2 of the second power board 200 and the fourth power terminal O4 of the fourth power board 400, and the first circuit breaker 130a is arranged between the first and third power terminals O1 and O3, the fourth circuit breaker 130d is arranged between the second and third power terminals O2 and O3, and the fifth circuit breaker 130e is arranged between the third and fourth power terminals O3 and O4, thereby, the connection between the first and third power boards 100 and 300 can be controlled by the first circuit breaker 130a, the connection between the second and third power boards 200 and 300 can be controlled by the fourth circuit breaker 130d, and the connection between the third and fourth power boards 300 and 400 can be controlled by the fifth circuit breaker 130e.

[0195] The fourth power terminal O4 of the fourth power board 400 is connected to a plurality of the DC circuits 1, thereby being connected to the first power terminal O1 of the first power board 100, the second power terminal O2 of the second power board 200 and the third power terminal O3 of the third power board 300, and the third circuit breaker 130c is arranged between the first and fourth power terminals O1 and O4, the sixth circuit breaker 130f is arranged between the second and fourth power terminals O2 and O4, and the fifth circuit breaker 130e is arranged between the third and fourth power terminals O3 and O4, thereby, the connection between the first and fourth power boards 100 and 400 can be controlled by the third circuit breaker 130c, the connection between the second and fourth power boards 200 and 400 can be controlled by the sixth circuit breaker 130f, and the connection between the third and fourth power boards 300 and 400 can be controlled by the fifth circuit breaker 130e.

[0196] The first to fourth power boards 100 , 200 , 300 , 400 are connected in this manner so that the power terminals O1 to O4 of the plurality of power boards 100 , 200 , 300 , 400 can be connected in a mesh form.

[0197] As described above, each of the plurality of power boards 100 , 200 , 300 , and 400 may be connected to each other to transmit the DC power between the plurality of power boards 100 , 200 , 300 , and 400 .

[0198] That is, Figure 1As shown, each of the plurality of power boards 100, 200, 300, 400 can be connected to each other, so that the power supply terminals O1 to O4 of the plurality of power boards 100, 200, 300, 400 are connected in a mesh form through the plurality of DC circuits 1, whereby the first power board 100 receives and supplies the DC power to the second power board 200, the third power board 300, or the fourth power board 400 by connecting to the second power board 200, the third power board 300, and the fourth power board 400, and the second power board 200 receives and supplies the DC power to the second power board 200, the third power board 300, or the fourth power board 400 by connecting to the first power board 100, the third power board 300, and the fourth power board 400 0 is connected to receive and supply the DC power with the first power board 100, the third power board 300 or the fourth power board 400, the third power board 300 is connected to the first power board 100, the second power board 200 and the fourth power board 400 to receive and supply the DC power with the first power board 100, the second power board 200 or the fourth power board 400, and the fourth power board 400 is connected to the first power board 100, the second power board 200 and the third power board 300 to receive and supply the DC power with the first power board 100, the second power board 200 or the third power board 300.

[0199] As described above, the plurality of power boards 100 , 200 , 300 , 400 connected in a mesh by the plurality of DC circuits 1 can receive and supply the DC power between the plurality of power boards 100 , 200 , 300 , 400 by opening and closing the plurality of circuit breakers 130 .

[0200] For example, when the first circuit breaker 130a of the circuit connected between the first power board 100 and the third power board 300 becomes closed, the DC power can be received and supplied between the first power board 100 and the third power board 300, when the second circuit breaker 130b of the circuit connected between the first power board 100 and the second power board 200 becomes closed, the DC power can be received and supplied between the first power board 100 and the second power board 200, and when the third circuit breaker 130c of the circuit connected between the first power board 100 and the fourth power board 400 becomes closed, the DC power can be received and supplied between the first power board 100 and the fourth power board 400. Source, when the fourth circuit breaker 130d of the circuit connected between the second power board 200 and the third power board 300 becomes a closed circuit, the DC power can be received and supplied between the second power board 200 and the third power board 300, when the fifth circuit breaker 130e of the circuit connected between the third power board 300 and the fourth power board 400 becomes a closed circuit, the DC power can be received and supplied between the third power board 300 and the fourth power board 400, and when the sixth circuit breaker 130f of the circuit connected between the second power board 200 and the fourth power board 400 becomes a closed circuit, the DC power can be received and supplied between the second power board 200 and the fourth power board 400.

[0201] Each of the plurality of power boards 100 , 200 , 300 , 400 can control and monitor the operation of one or more of the first power conversion devices 110 , 210 , 310 , 410 and the second power conversion devices 120 , 220 , 320 , 420 included therein.

[0202] Each of the plurality of power boards 100, 200, 300, 400 can control the opening and closing of each of the first to fourth circuit breakers 130a to 130d based on the results of controlling and monitoring the actions of one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420 included therein.

[0203] Each of the plurality of power boards 100, 200, 300, 400 can control and monitor the operation of one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420 included therein to detect the status of the DC power supply and the driving power supply.

[0204] Each of the plurality of power boards 100 , 200 , 300 , 400 may receive power from any one of the one or more power supply sources 10 and convert the power into the DC power.

[0205] That is, each of the plurality of power strips 100 , 200 , 300 , 400 can selectively receive power from any one of the at least one power supply sources 10 .

[0206] Each of the plurality of power strips 100 , 200 , 300 , 400 may receive power from any one of the one or more power supply sources 10 according to a preset supply standard, and convert the power into the DC power.

[0207] The supply standard may be a standard regarding power supply priorities of one or more power supply sources 10 .

[0208] The plurality of power boards 100, 200, 300, 400 can select any one of the first power conversion devices 110, 210, 310, 410 according to the status of the one or more power supply sources 10, and transmit the DC power to the second power conversion device 120, 220, 320, 420 through the selected conversion device.

[0209] That is, each of the plurality of power boards 100 , 200 , 300 , 400 may transmit the DC power to the second power conversion device 120 , 220 , 320 , 420 via a conversion device selected according to the status of one or more of the power supply sources 10 .

[0210] When an abnormality occurs in one or more of the conversion device that is transmitting the DC power to the second power conversion device 120, 220, 320, 420 for converting into the driving power and the power supply source corresponding to the conversion device, the plurality of power boards 100, 200, 300, 400 can transmit the DC power to the second power conversion device 120, 220, 320, 420 through other conversion devices other than the conversion device.

[0211] That is, when an abnormality occurs in any one or more of the conversion device that is transmitting the DC power supply and the power supply source corresponding to the conversion device, each of the multiple power boards 100, 200, 300, 400 can be switched to other conversion devices except the conversion device, and the second power conversion device 120, 220, 320, 420 can be supplied through the switched conversion device.

[0212] When an abnormality occurs in any one or more of the conversion device that is transmitting the DC power to the second power conversion device 120, 220, 320, 420 and the power supply source corresponding to the conversion device, the multiple power boards 100, 200, 300, 400 can switch the power supply source and the conversion device that are supplying power, so that other conversion devices except the conversion device transmit the DC power to the second power conversion device 120, 220, 320, 420.

[0213] Among the plurality of circuit breakers 130, 230, 330, 430, when the power supply of more than one of the plurality of power boards 100, 200, 300, 400 is interrupted, the circuit breaker arranged between the power board whose power supply is interrupted and the power board adjacent to the interrupted power board can form a closed circuit so that the interrupted power board is connected to the adjacent power board through the plurality of DC circuits 1, so that the DC power is supplied from the adjacent power board to the interrupted power board.

[0214] In this case, the interrupted power board may be supplied with the DC power by the conversion device connected to the battery power source B from the time when the power supply is interrupted until the DC power conducted from the adjacent power board is supplied.

[0215] Such a system 1000 may also include a control device 600 for monitoring the status of at least one of the plurality of power strips 100, 200, 300, 400 and the plurality of circuit breakers 130, and controlling at least one of the plurality of power strips 100, 200, 300, 400 and the plurality of circuit breakers 130 according to the monitoring results.

[0216] That is, the plurality of power strips 100 , 200 , 300 , 400 may be controlled by the control device 600 .

[0217] Each of the plurality of power strips 100 , 200 , 300 , 400 may communicate with the control device 600 , and perform an operation according to a result of the communication with the control device 600 .

[0218] For example, a control command may be received from the control device 600 and an action may be performed according to the control command, or status information may be sent to the control device 600 .

[0219] Each of the multiple power boards 100, 200, 300, 400 can request the control device 600 to perform opening and closing control on each of the first to fourth circuit breakers 130a to 130d based on the results of controlling and monitoring the actions of one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420 included therein.

[0220] Each of the plurality of power boards 100, 200, 300, 400 can send the results of controlling and monitoring the operation of one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420 included therein to the control device 600.

[0221] Each of the multiple power boards 100, 200, 300, 400 can control and monitor the operation of one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420 included therein, and send the results of detecting the status of the DC power supply and the driving power supply to the control device 600.

[0222] Here, each of the multiple power boards 100, 200, 300, 400 may also include a control unit 140, 240, 340, 440, which is used to control one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420, and monitor at least one abnormal state of one or more of the power supply sources 10, one or more of the first power conversion devices 110, the DC power supply, the drive power supply and the load 20.

[0223] The control unit 140 , 240 , 340 , 440 may be a central control device of each of the plurality of power strips 100 , 200 , 300 , 400 .

[0224] The control unit 140 , 240 , 340 , 440 may include a plurality of control units for controlling a plurality of the power strips 100 , 200 , 300 , 400 .

[0225] The control unit 140 , 240 , 340 , 440 may further include a plurality of electronic devices for executing the functions of the plurality of power strips 100 , 200 , 300 , 400 .

[0226] For example, it may include a storage unit storing software / applications / programs for executing the functions of a plurality of the power strips 100, 200, 300, 400 and controlling them, a dedicated control unit including the storage unit, a communication unit, a display unit, and one or more of an input unit.

[0227] The control units 140 , 240 , 340 , 440 may be controlled by the control device 600 .

[0228] The control unit 140 , 240 , 340 , 440 may include a PLC (Programmable Logic Controller) for controlling one or more of the first power conversion device 110 , 210 , 310 , 410 and the second power conversion device 120 , 220 , 320 , 420 .

[0229] The control unit 140, 240, 340, 440 can monitor the status of one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420, and control the operation of one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420 based on the monitoring results.

[0230] The control unit 140 , 240 , 340 , 440 may also control the operation of one or more of the first power conversion devices 110 , 210 , 310 , 410 and the second power conversion devices 120 , 220 , 320 , 420 based on the status of one or more of the power supply sources 10 and the load 20 .

[0231] The control unit 140 , 240 , 340 , 440 may control the conversion and supply of the DC power by controlling the operation of each of the at least one first power conversion device 110 , 210 , 310 , 410 .

[0232] The control unit 140 , 240 , 340 , 440 may further control the opening and closing of each opening and closing unit included in one or more of the first power conversion devices 110 , 210 , 310 , 410 .

[0233] The control unit 140 , 240 , 340 , 440 may control the conversion and supply of the driving power by controlling the operation of each of the second power conversion devices 120 , 220 , 320 , 420 .

[0234] The control unit 140 , 240 , 340 , 440 may also control the opening and closing of each opening and closing unit included in the second power conversion device 120 , 220 , 320 , 420 .

[0235] The control unit 140, 240, 340, 440 can also communicate with any one or more of the external communication device and the control device 600, and control the operation of one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420 according to the communication results.

[0236] For example, a control command for controlling the action of one or more of the first power conversion devices 110, 210, 310, 410 and any one of the second power conversion devices 120, 220, 320, 420 can be received from the control device 600, and the action of one or more of the first power conversion devices 110, 210, 310, 410 and any one of the second power conversion devices 120, 220, 320, 420 can be controlled according to the control command.

[0237] The control unit 140 , 240 , 340 , 440 may perform control to receive power from any one of the one or more power supply sources 10 and convert the power into the DC power.

[0238] That is, the control unit 140 , 240 , 340 , 440 may perform control to selectively receive power from any one of the at least one power supply sources 10 .

[0239] The control unit 140 , 240 , 340 , 440 may perform control to receive power from any one of the one or more power supply sources 10 and convert the power into the DC power according to a preset supply standard.

[0240] The supply standard may be a standard regarding power supply priorities of one or more power supply sources 10 .

[0241] For example, the order of the first AC power source 10 # 1 , the second AC power source 10 # 3 , and the battery power source 10 # 3 may be set.

[0242] In the case of such a supply standard, the control unit 140, 240, 340, 440 may control to receive power in the order of the first AC power source 10#1, the second AC power source 10#3, and the battery power source 10#3.

[0243] When receiving power from the first AC power source 10 # 1 , the control unit 140 , 240 , 340 , 440 may control the operation of the first conversion device 110 # 1 , 210 # 1 , 310 # 1 , 410 # 1 connected to the first AC power source 10 # 1 .

[0244] In this case, the control unit 140, 240, 340, 440 can make the opening and closing units of the first conversion devices 110#1, 210#1, 310#1, 410#1 form a closed circuit, and make the opening and closing units of the second conversion devices 110#2, 210#2, 310#2, 410#2 and the third conversion devices 110#3, 210#3, 310#3, 410#3 form an open circuit, thereby connecting the first conversion devices 110#1, 210#1, 310#1, 410#1 and disconnecting the second conversion devices 110#2, 210#2, 310#2, 410#2 and the third conversion devices 110#3, 210#3, 310#3, 410#3.

[0245] When receiving power from the second AC power source 10 # 3 , the control unit 140 , 240 , 340 , 440 may control the operation of the third conversion device 110 # 2 , 210 # 2 , 310 # 2 , 410 # 2 connected to the second AC power source 10 # 3 .

[0246] In this case, the control unit 140, 240, 340, 440 can make the opening and closing units of the third conversion device 110#3, 210#3, 310#3, 410#3 form a closed circuit, and make the opening and closing units of the first conversion device 110#1, 210#1, 310#1, 410#1 and the second conversion device 110#2, 210#2, 310#2, 410#2 form an open circuit, thereby connecting the third conversion device 110#3, 210#3, 310#3, 410#3 and disconnecting the first conversion device 110#1, 210#1, 310#1, 410#1 and the second conversion device 110#2, 210#2, 310#2, 410#2.

[0247] When receiving power from the battery power source 10 # 2 , the control unit 140 , 240 , 340 , 440 may control the operation of the second conversion device 110 # 2 , 210 # 2 , 310 # 2 , 410 # 2 connected to the battery power source 10 # 2 .

[0248] In this case, the control unit 140, 240, 340, 440 can make the opening and closing units of the second conversion devices 110#2, 210#2, 310#2, 410#2 form a closed circuit, and make the opening and closing units of the first conversion devices 110#1, 210#1, 310#1, 410#1 and the third conversion devices 110#3, 210#3, 310#3, 410#3 form an open circuit, thereby only connecting the second conversion devices 110#2, 210#2, 310#2, 410#2 and disconnecting the first conversion devices 110#1, 210#1, 310#1, 410#1 and the third conversion devices 110#3, 210#3, 310#3, 410#3.

[0249] The control unit 140, 240, 340, 440 can control to select any one of the first power conversion devices 110, 210, 310, 410 according to the status of one or more power supply sources 10, and have it supply the DC power to the second power conversion device 120, 220, 320, 420.

[0250] That is, the control unit 140 , 240 , 340 , 440 may perform control to convert the DC power through one or more selected conversion devices among the first power conversion devices 110 , 210 , 310 , 410 and transmit it to the second power conversion device 120 .

[0251] For example, when an abnormality occurs in the first AC power source 10#1 and the second AC power source 10#3 in one or more of the power supply sources 10, control can be performed to select the second conversion device 110#2, 210#2, 310#2, 410#2 connected to the battery power source 10#2, so that the second conversion device 110#2, 210#2, 310#2, 410#2 receives power from the battery power source 10#2 and converts it into the DC power supply, and each of the second power conversion devices 120, 220, 320, 420 of the refrigerator transmits the DC power supply.

[0252] When an abnormality occurs in any one or more of the conversion device 110, 210, 310, 410 that is transmitting the DC power to the second power conversion device 120, 220, 320, 420 and the power supply source 10 corresponding to the conversion device 110, 210, 310, 410, the control unit 140, 240, 340, 440 can control other conversion devices 110, 210, 310, 410 except the conversion device 110, 210, 310, 410 to transmit the DC power to the second power conversion device 120, 220, 320, 420.

[0253] When an abnormality occurs in any one or more of the conversion device 110, 210, 310, 410 that is transmitting the DC power to the second power conversion device 120, 220, 320, 420 and the power supply source 10 corresponding to the conversion device 110, 210, 310, 410, the control unit 140, 240, 340, 440 can switch to the power supply source 10 that is supplying power and the conversion device 110, 210, 310, 410, so that other conversion devices 110, 210, 310, 410 except the conversion device 110, 210, 310, 410 transmit the DC power to the second power conversion device 120, 220, 320, 420.

[0254] For example, in the process of receiving power from the first AC power supply 10#1 and converting the DC power supply through the first conversion device 110#1, 210#1, 310#1, 410#1, when the first conversion device 110#1, 210#1, 310#1, 410#1 fails, or when the first AC power supply 10#1 stops operating, the first AC power supply 10#1 that is supplying power can be switched to the second AC power supply 10#3, and the first conversion device 110#1, 210#1, 310#1, 410#1 can be switched to the third conversion device 110#3, 210#3, 310#3, 410#3 to receive power from the second AC power supply 10#3, and the third conversion device 110#3, 210#3, 310#3, 410#3 converts the power into the DC power so as to transmit the DC power to the second power conversion device 120, 220, 320, 420.

[0255] As described above, the control unit 140, 240, 340, 440 that controls one or more of the first power conversion devices 110, 210, 310, 410 and the second power conversion devices 120, 220, 320, 420 can request the control device 600 to receive and supply the DC power supply according to the state of the DC power supply or the driving power supply.

[0256] For example, when the size of the driving power supply is smaller than the size required by the load 20, or when the DC power supply is insufficient, the control device 600 can be requested to close a plurality of the circuit breakers 130 to receive and supply the DC power supply from other power boards 100, 200, 300 or 400.

[0257] Alternatively, when the size of the driving power supply is greater than the size required by the load 20, or when the DC power supply is sufficient, the control device 600 can be requested to close a plurality of the circuit breakers 130 to supply the DC power to other power boards 100, 200, 300 or 400.

[0258] In the opposite case, when one or more of the first power conversion devices 110, 210, 310, 410 or the second power conversion devices 120, 220, 320, 420 fails and causes the fault current to flow through the power supply terminals O1 to O4, or when one or more of the power supply sources 10 or the loads 20 is abnormal and causes the fault current to flow through the power supply terminals O1 to O4, the control device 600 can be requested to open a plurality of the circuit breakers 130 to prevent the fault current from being supplied to other power boards 100, 200, 300 or 400.

[0259] When one or more of the power supply sources 10 fails, the control unit 140, 240, 340, 440 can request the control device 600 to control to close the plurality of circuit breakers 130, so as to receive the DC power from the other power boards 100, 200, 300 or 400 connected to the power terminals O1 to O4.

[0260] When an abnormality occurs in the other power boards 100, 200, 300 or 400 connected to the power terminals O1 to O4, the control unit 140, 240, 340, 440 can request the control device 600 to control to close the plurality of circuit breakers 130, so as to supply DC power to the other power boards 100, 200, 300 or 400.

[0261] When an abnormality occurs in the other power boards 100, 200, 300 or 400 connected to the power terminals O1 to O4, the control unit 140, 240, 340, 440 can request the control device 600 to control to further receive power from any one of the more than one power supply sources 10, and close the plurality of circuit breakers 130 to supply the DC power converted by the supply source 10 controlled to further supply power and the corresponding conversion devices 110, 210, 310, 410 to the other power boards 100, 200, 300 or 400 through the power terminals O1 to O4.

[0262] The control device 600 may control the reception and supply of the DC power by controlling the actions of the plurality of circuit breakers 130 .

[0263] For example, the following control may be performed to close the plurality of circuit breakers 130 so as to receive or supply the DC power between the plurality of power boards 100 , 200 , 300 , and 400 .

[0264] The control device 600 may communicate with each of the plurality of power strips 100 , 200 , 300 , 400 , and control each of the plurality of power strips 100 , 200 , 300 , 400 according to status information received from each of the plurality of power strips 100 , 200 , 300 , 400 .

[0265] For example, the conversion and supply of the DC power of each of the multiple power boards 100, 200, 300, 400 and the conversion and supply of the driving power of each of the multiple power boards 100, 200, 300, 400 can be controlled based on the status information of the DC power and the driving power received from each of the multiple power boards 100, 200, 300, 400.

[0266] The control device 600 can communicate with each of the plurality of power strips 100, 200, 300, 400 to convert and supply the driving power of each of the plurality of power strips 100, 200, 300, 400 or control the plurality of circuit breakers 130 according to the status information received from the plurality of power strips 100, 200, 300, 400.

[0267] The control device 600 can also detect the status of one or more power supply sources 10 and the load 20, or receive status information about one or more power supply sources 10 and the load 20 from an external communication unit, so as to control the conversion and supply of the driving power of each of the multiple power boards 100, 200, 300, 400 or the multiple circuit breakers 130 based on the status of one or more power supply sources 10 and the load 20.

[0268] In this case, the control device 600 can send a control command for controlling the conversion and supply of the driving power of each of the plurality of power boards 100, 200, 300, 400 or the plurality of circuit breakers 130 to each of the plurality of power boards 100, 200, 300, 400 or each of the plurality of circuit breakers 130, so that the control unit 140, 240, 340, 440 included in each of the plurality of power boards 100, 200, 300, 400 performs control based on the control command, or performs opening and closing control of each of the plurality of circuit breakers 130.

[0269] For example, when an abnormality occurs in the entire system power supply G that is supplying power to the plurality of power boards 100, 200, 300, 400, in order to cut off the power supply from the system power supply G and switch to other supply sources, a control command is sent to the control unit 140, 240, 340, 440 included in each of the plurality of power boards 100, 200, 300, 400, and the control method of the control command is to open the plurality of circuit breakers 130, receive power from a power source other than the system power supply G, convert the power into the DC power supply, and supply the DC power supply, thereby performing the following control so that each of the plurality of circuit breakers 130 forms an open circuit to receive power from the bypass power supply P or the battery power supply B, and convert and supply the DC power supply.

[0270] The control device 600 can control the plurality of power boards 100 , 200 , 300 , 400 to receive the DC power by controlling the opening and closing of the plurality of circuit breakers 130 .

[0271] When an abnormality occurs in any one of the multiple power boards 100, 200, 300, 400, the control device 600 can perform the following control to close the circuit breaker of any circuit connected to the power board where the abnormality occurs, so that the power board where the abnormality occurs receives the DC power from other power boards.

[0272] That is, when an abnormality occurs in any one of the multiple power boards 100, 200, 300, 400, the control device 600 can perform the following control to close any one of the circuit breakers 130 connected to the power board where the abnormality occurs, so that the power board where the abnormality occurs receives the DC power from other power boards.

[0273] For example, when a conversion device 110 of the first power board 100 among the plurality of power boards 100, 200, 300, 400 fails, in order to supply the DC power converted by any one of the conversion devices 210, 310 or 410 of the second power board 200, the third power board 300 or the fourth power board 400 to the second power conversion device 120 of the first power board 100, a control command is sent to the first power board 100 and the second power board 200, the third power board 300 or the fourth power board 400 respectively, and is also sent to the first circuit breaker 130a, the second circuit breaker 130b or the third circuit breaker 130c respectively, and the control method of the control command is to turn on the first circuit breaker 130a on the circuit connected to the first power board 100 and the third power board 300, and the second circuit breaker 130b on the circuit connected to the first power board 100 and the second power board 200. 0b or the third circuit breaker 130c on the circuit connected to the first power board 100 and the fourth power board 400 is closed, and one or more of the first power conversion devices 110 of the first power board 100 are cut off to supply the DC power converted by any one of the first power conversion devices 210, 310 or 410 of the second power board 200, the third power board 300 or the fourth power board 400 to the second power conversion device 120 of the first power board 100, so that the following control can be performed to close the first circuit breaker 130a, the second circuit breaker 130b or the third circuit breaker 130c, and the DC power is supplied to the second power conversion device 120 of the first power board 100 by any one of the first power conversion devices 210, 310 or 410 of the second power board 200, the third power board 300 or the fourth power board 400.

[0274] That is, each of the plurality of power boards 100, 200, 300, 400 can supply the DC power to the load 20 of the power board where the abnormality occurs when the other power boards have abnormality.

[0275] Here, when the DC power is supplied to the power board where the abnormality has occurred, the plurality of power boards 100, 200, 300, 400 can select any one of the one or more first power conversion devices 110, 210, 310, 410 for converting into the DC power according to the status of one or more power supply sources 10, and transmit the DC power to the power board where the abnormality has occurred through the selected converter.

[0276] That is, when the DC power is supplied to the power board where the abnormality occurs, the plurality of power boards 100, 200, 300, 400 can supply the DC power to the power board where the abnormality occurs through a converter selected according to the status of one or more of the power supply sources 10.

[0277] For example, in the process of the second power board 200 supplying the DC power to the first power board 100, when the rated values ​​of the system power supply G and the bypass power supply P in one or more of the power supply sources 10 that are supplying power to the second power board 200 are lower than the reference rated values, the second conversion device corresponding to the battery power supply B can be selected to supply the DC power through the battery power supply B, and the selected second conversion device 210#2 converts the power received from the battery power supply B into the DC power and transmits it to the first power board 100.

[0278] When an abnormality occurs in any one of the multiple power boards 100, 200, 300, 400, the control device 600 can perform the following control to close two or more of the circuit breakers 130 of the circuit connected to the power board where the abnormality occurs, so that the power board where the abnormality occurs receives the DC power from two or more other power boards.

[0279] That is, when an abnormality occurs in any one of the multiple power boards 100, 200, 300, 400, the control device 600 can perform the following control to close two or more of the circuit breakers 130 connected to the power board where the abnormality occurs, so that the power board where the abnormality occurs receives the DC power from more than two power boards.

[0280] For example, when an abnormality occurs in the first power strip 100, the second circuit breaker 130b for controlling the connection between the first power strip 100 and the adjacent second power strip 200, and the first circuit breaker 130a for controlling the connection between the first power strip 100 and the third power strip 300 can be closed, so that the first power strip 100 can receive the DC power from the second power strip 200 and the third power strip 300.

[0281] When there are multiple power boards with abnormalities, the control device 600 can perform the following control to close the multiple circuit breakers 130 used to control the connection between each of the power boards with abnormalities and the nearest power board, so that each of the power boards with abnormalities receives the DC power from each adjacent power board.

[0282] That is, when there are multiple power boards with abnormality, the control device 600 can perform the following control so that each of the multiple adjacent power boards adjacent to the power board with abnormality supplies the DC power to the power board with abnormality.

[0283] For example, when the first power strip 100 and the second power strip 200 fail, the first circuit breaker 130a for controlling the connection between the first power strip 100 and the third power strip 300, and the fourth circuit breaker 130d for controlling the connection between the second power strip 200 and the fourth power strip 400 can be closed, so that the first power strip 100 can receive the DC power from the third power strip 300, and the second power strip 200 can receive the DC power from the fourth power strip 400.

[0284] As described above, when an abnormality occurs in any one of the plurality of power strips 100, 200, 300, 400, control can be performed to close the circuit breaker 130 used to control the connection between the power strip where the abnormality occurs and the other power strips, so that the power strip where the abnormality occurs can receive the DC power from the other power strips, so that each of the plurality of power strips 100, 200, 300, 400 can perform the UPS function.

[0285] Therefore, in the power supply system 1000, even when unexpected abnormalities occur in one or more of the power supply sources 10, the plurality of power boards 100, 200, 300, 400 and the load 20, the driving power can be continuously supplied to the load 20, thereby maintaining the operation of the plurality of loads 20 without interruption, and the power supply can be appropriately and proactively responded to the occurrence of abnormalities, thereby stably performing the operation of the plurality of loads 20 and the control of the power supply system 1000 regardless of the type and degree of the abnormality.

[0286] The operation example of the power supply system 1000 described above can be as follows Figures 4 to 7 Execute as shown.

[0287] Figure 4 As Figure 7 The operation example shown is an operation example when the power supply system 1000 includes four power boards 100, 200, 300, 400. The power supply system 1000 may also include less than five or more than five power boards 100, 200, 300, 400.

[0288] The preferred embodiment of the power supply system 1000 can be as follows Figures 4 to 7As shown, four power boards 100, 200, 300, 400 are included. Figures 4 to 7 As shown, the case where the plurality of power boards 100 , 200 , 300 , and 400 are five is taken as an example for description.

[0289] Figure 4 This is a situation where each of the plurality of power boards 100, 200, 300, 400 receives power from the system power supply G in one or more of the power supply sources 10. In this case, the power supply from the bypass power supply P and the battery power supply B is cut off, and power can be received through the system power supply G, and then the power is sequentially converted into the DC power supply and the drive power supply and supplied to each of the plurality of loads 20.

[0290] like Figure 4 The operation example shown is a case of normal operation in which the power is received from the system power supply G. The normal operation of the power supply system 1000 can be performed in this manner.

[0291] Figure 5 This is a situation where each of the plurality of power boards 100, 200, 300, 400 receives power from the bypass power supply P in one or more of the power supply sources 10. A situation where an abnormality occurs in the system power supply G may correspond to this situation. In this case, the power supply from the system power supply G and the battery power supply B is cut off, and power can be received through the bypass power supply P, and then the power is sequentially converted into the DC power supply and the drive power supply and supplied to each of the plurality of loads 20.

[0292] like Figure 5 The operation example shown is a case of a special operation in which the power is received from the bypass power source P to operate, and the special operation of the power supply system 1000 can be performed in this manner.

[0293] Figure 6 This is a situation where each of the multiple power boards 100, 200, 300, 400 receives power from the battery power supply B in one or more of the power supply sources 10. A situation where an abnormality occurs in the system power supply G and the bypass power supply P may correspond to this situation. In this case, the power supply from the system power supply G and the bypass power supply P is cut off, and power can be received through the battery power supply B, and then the power is sequentially converted into the DC power supply and the drive power supply and supplied to each of the multiple loads 20.

[0294] like Figure 6The operation example shown is a case of power-off operation in which the power is received from the battery power source B. The power-off operation of the power supply system 1000 can be performed in this manner.

[0295] Figure 7 This is a situation where each of the multiple power boards 100, 200, 300, 400 receives power from the emergency power supply A in one or more of the power supply sources 10. The situation where abnormalities occur in the system power supply G, the bypass power supply P, and the battery power supply B can correspond to this situation. In this case, the power supply from the system power supply G, the bypass power supply P, and the battery power supply B is cut off, and the emergency power supply A can directly supply the driving power to each of the multiple loads 20.

[0296] like Figure 7 The operation example shown is a case of emergency operation in which the power is received from the emergency power supply A to operate. The emergency operation of the power supply system 1000 can be performed in this manner.

[0297] As described above, in the power supply system 1000, each of the plurality of power strips 100, 200, 300, 400 can receive power from the same power supply source to operate, or each of the plurality of power strips 100, 200, 300, 400 can also selectively receive power from any one of more than one power supply source 10 to operate.

[0298] For example, the first and second power boards 100 and 200 may receive power from the system power G to operate, and the third and fourth power boards 300 and 400 may receive power from the bypass power P to operate.

[0299] In addition, each of the plurality of power strips 100 , 200 , 300 , 400 may also receive power from at least one power supply source 10 to operate.

[0300] For example, when an abnormality occurs in the first power board 100 and the DC power is supplied from the second power board 200 to the first power board 100, the second power board 200 can convert the power received from the system power supply G into the DC power through the 2-1 conversion device 210#1 and transmit it to each of the second power conversion devices 220, further receive power from the bypass power supply P and convert it into the DC power through the 2-3 conversion device 210#3, and can transmit the DC power converted by the 2-3 conversion device 210#3 to each of the second power conversion devices 120 of the first power board 100.

[0301] In such an example case, by closing the second circuit breaker 130b to which the first power strip 100 and the second power strip 200 are connected, the first power strip 100 and the second power strip 200 are connected to each other, so that the DC power can be supplied from the second power strip 200 to the first power strip 100.

[0302] As described above, each of the plurality of power strips 100, 200, 300, 400 receives power from more than one power supply source 10 to operate, so that power supply between the plurality of power strips 100, 200, 300, 400 can be performed, that is, the UPS function between the plurality of power strips 100, 200, 300, 400 and the UPS function of the supply strip 500 can be performed.

[0303] The above-mentioned embodiment of the power supply system of the present invention can be applied to a power supply device, a power supply system, and an operating method of a power supply system that supplies / uses a DC power supply. In particular, it can be usefully applied to a DC UPS module and a power supply system having the module, and can be applied to and implemented in a motor control board, a motor control system, a motor operation system, etc. that controls a plurality of motor loads.

[0304] Although the specific embodiments of the present invention have been described above, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited by the described embodiments, and should not be limited only by the claims described below, but also by the contents equivalent to the claims.

[0305] As mentioned above, although the present invention is described by limited embodiments and drawings, the present invention is not limited to the above embodiments, and a person skilled in the art of the present invention can make various modifications and variations according to the above description. Therefore, the spirit of the present invention should be understood by the attached claims, and all equivalent or equivalent variations thereof will be considered to be within the spirit of the present invention.

[0306] Description of Reference Numerals

[0307] 10: Power supply source 20: Load

[0308] 100 (200, 300, 400): Power supply device (power board)

[0309] 110 (210, 310, 410): First power conversion device (converter)

[0310] 120 (220, 320, 420): second power conversion device (inverter)

[0311] 130a to 130f: First to sixth circuit breakers

[0312] 140 (240, 340, 440): Control unit

[0313] 600: Control device 1000: Power supply system

Claims

1. A power supply system, characterized in that: include: a plurality of power boards for converting power received from one or more power supply sources into DC power, and converting the DC power into driving power for a load to supply the driving power to the load; and a plurality of circuit breakers, arranged between respective power supply terminals of each of the plurality of power supply boards for inputting or outputting the DC power supply, The plurality of circuit breakers are switched on and off based on the power supply status of at least one of the plurality of power boards, thereby connecting or disconnecting the DC power between the plurality of power boards. When the power supply to one or more of the plurality of power boards is interrupted, one or more of the plurality of circuit breakers forms a closed circuit to uninterruptedly supply power to the power board to which the power supply is interrupted, thereby connecting the power supply to the power board to which the power supply is interrupted.

2. The power supply system according to claim 1, characterized in that: The one or more power supply sources include: A first AC power source and a second AC power source supplying AC power; and A battery power source stores DC power to supply the stored power to the plurality of power strips while the power supply is restored by switching when the power supply of the first AC power source and the second AC power source is interrupted.

3. The power supply system according to claim 2, characterized in that: The battery power source uninterruptedly supplies the stored power to the plurality of power boards after the power supply is interrupted until the power supply is restored by switching.

4. The power supply system according to claim 2, characterized in that: One or more of the power supply sources also includes an emergency power supply, The emergency power supply supplies emergency generated power to the load when power supply from the first AC power supply, the second AC power supply, and the battery power supply is interrupted.

5. The power supply system according to claim 2, characterized in that: Each of the plurality of power boards comprises: one or more first power conversion devices converting power received from one or more of the power supply sources into the DC power; and A second power conversion device converts the DC power received from one or more of the first power conversion devices into the driving power and supplies the driving power to the load.

6. The power supply system according to claim 5, characterized in that: The plurality of power boards supply the DC power to the second power conversion device through any one of the one or more first power conversion devices according to the state of the one or more power supply sources.

7. The power supply system according to claim 6, characterized in that: In the plurality of power boards, when power supply from a conversion device that supplies the DC power to the second power conversion device is interrupted, the DC power is supplied to the second power conversion device by conversion devices other than the conversion device.

8. The power supply system according to claim 7, characterized in that: During a period in which the one or more first power conversion devices are switched to the other conversion devices, the DC power supply is supplied to the second power conversion device by the conversion device receiving power from the battery power supply.

9. The power supply system according to claim 2, characterized in that: In the plurality of power boards, the power terminal of any one power board is connected to each of the power terminals of the other power boards.

10. The power supply system according to claim 9, characterized in that: The plurality of circuit breakers are arranged between the power supply terminal of any one of the power boards and each of the power supply terminals of the other power boards.

11. The power supply system according to claim 2, characterized in that: Also included are a plurality of DC circuits, wherein the plurality of DC circuits connect each of the power supply terminals to each other, The plurality of circuit breakers are disposed in each of the plurality of DC circuits to switch on or off the DC power source of each of the plurality of DC circuits.

12. The power supply system according to claim 2, characterized in that: The plurality of circuit breakers have a number corresponding to the number when the power supply terminal of any one of the plurality of power supply boards is connected to each of the power supply terminals of the other power supply boards.

13. The power supply system according to claim 2, characterized in that: When the number of the power boards is N, the number of the circuit breakers is N(N-1) / 2.

14. The power supply system according to claim 2, characterized in that: When the DC power source is connected between the plurality of power boards, the plurality of circuit breakers form a closed circuit, and when the DC power source is disconnected between the plurality of power boards, the plurality of circuit breakers form an open circuit.

15. The power supply system according to claim 2, characterized in that: In a plurality of said circuit breakers, When the power supply to more than one of the plurality of power boards is interrupted, a circuit breaker arranged between the power board whose power supply is interrupted and a power board adjacent to the interrupted power board forms a closed circuit to connect the interrupted power board and the adjacent power board, so that the DC power is supplied from the adjacent power board to the interrupted power board.

16. The power supply system according to claim 15, characterized in that: The interrupted power board supplies the DC power from the time when the power supply is interrupted until the DC power conducted from the adjacent power board is supplied, by the conversion device connected to the battery power supply.

17. The power supply system according to claim 1, characterized in that: It also includes a control device, which monitors the status of the plurality of power boards and at least one of the plurality of circuit breakers, and controls the plurality of power boards and at least one of the plurality of circuit breakers according to the monitoring result.

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