Power supply equipment and power supply system

Abstract

The present invention relates to a power supply device and a power supply system capable of providing uninterrupted power supply, and relates to a power supply device and a power supply system that are provided with a circuit breaker that limits the connection of a power bus to which a plurality of power supply devices are connected, and that controls the reception / supply of power by opening and closing the circuit breaker according to various conditions occurring in the system, 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 device and a power supply system capable of providing uninterrupted power supply. Background Art

[0002] The background art 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 in common through a DC bus. In this way, when they are connected in common to the bus, there is an advantage that power can be received / supplied to adjacent power supply devices through the DC bus. However, when the system is constructed in this way, there are limitations such as system stability problems, difficulty in controlling the reception / supply of power, and lack of a response plan when an accident occurs.

[0004] In the case where the compatibility between devices is reduced due to the provision of multiple power supply devices implemented by complex structures, the system operation cannot be performed stably. In addition, in the case where the load powered by each device is an important load that needs to be powered at all times, it is necessary to set up an additional UPS (Uninterrupted Power Supply) device to deal with abnormal conditions. In the case of a UPS device, the structure of the system will become more complicated, resulting in the difficulty of setting up the UPS device itself due to structural / design limitations. In addition, as the structure becomes more complex, the control of each device and system can only become more complicated, and the risk of failures and accidents will also increase. Ultimately, there is a problem that it is difficult to provide stable and reliable power supply, resulting in the problem that the operation of the load can only be carried out unstably, and it is impossible to form a suitable operation response to various accidents. Summary of the invention

[0005] Problem that the invention aims to solve

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

[0007] That is, the present invention provides a power supply device and a power supply system that can improve the limits of the conventional technology.

[0008] Specifically, an object of the present invention is to provide a power supply device and a power supply system that realizes reception / supply of power between a plurality of power supply devices provided in a system, whereby the plurality of power supply devices can respectively perform UPS functions between each other.

[0009] Another object of the present invention is to provide a power supply device and a power supply system capable of effectively maintaining power supply to a load under various abnormal conditions.

[0010] Furthermore, an object of the present invention is to provide a power supply device and a power supply system that can achieve stable and appropriate power supply and reception responses to various abnormal situations.

[0011] Means used to solve problems

[0012] The power supply device and power supply system of the present invention for solving the above-mentioned problems adopt the following technical solution as a means to solve the problem: a circuit breaker is provided for limiting the connection of a power bus to which a plurality of power supply devices are connected, and the reception / supply of power is controlled by opening and closing the circuit breaker according to various conditions occurring in the system.

[0013] That is, the technical feature of the power supply device and 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 / supplied through a power bus by controlling the circuit breakers, thereby performing a UPS function between the plurality of power supply devices.

[0014] The technical features described above can be applied to a power supply device and a power supply system for implementation. This specification provides embodiments of a power supply device and a power supply system having the technical features described above.

[0015] An embodiment of the power supply device of the present invention, which uses the above-mentioned technical features as a means to solve the problem, includes: a plurality of first power conversion devices, which convert power received from each of a plurality of power supply sources into a DC power supply; one or more second power conversion devices, which convert the DC power supply into a driving power supply and supply it to a load; a first circuit breaker, which is arranged between a first power supply terminal and a bus bar, wherein the first power supply terminal is connected to an output terminal of any one of the plurality of first power conversion devices to input / output the DC power supply, and the bus bar is connected to the first power supply terminal to allow the DC power supply to pass; and a second circuit breaker, which is arranged between the first power supply terminal and the second power supply terminal, wherein the second power supply terminal is connected to the plurality of The output ends of the remaining first power conversion devices among the first power conversion devices are connected to the input ends of the second power conversion device, and the second circuit breaker connects or disconnects the first power supply end and the second power supply end; the first circuit breaker changes opening and closing according to the states of the DC power supply, the drive power supply, the plurality of first power conversion devices and at least one of the loads, thereby connecting or limiting the DC power supply between the first power supply end and the bus, and the second circuit breaker changes opening and closing according to the states of the DC power supply, the drive power supply, the plurality of first power conversion devices and at least one of the loads, thereby connecting or limiting the DC power supply between the first power supply end and the second power supply end.

[0016] In an embodiment of the power supply device, the plurality of power sources may include a first alternating current power source and a second alternating current power source that supply AC power.

[0017] In one embodiment of the power supply device, the plurality of power supply sources further include a battery storing a DC power source, and in the event that the supply of the DC power source to the second power conversion device is interrupted, the power stored in the battery can be supplied to the first power conversion device while the supply of the DC power source is restored.

[0018] In one embodiment of the power supply device, the supply interruption of the DC power supply may be one or more of the supply interruption of the first AC power supply and the second AC power supply, and the operation interruption of the plurality of first power conversion devices receiving power from the first AC power supply and the second AC power supply.

[0019] In an embodiment of the power supply device, after the supply of the DC power source is interrupted, the battery may continuously supply the stored power to the plurality of first power conversion devices until the supply of the DC power source is switched and restored.

[0020] In one embodiment of the power supply device, the plurality of first power conversion devices may include a first conversion device, a second conversion device and a third conversion device, and the first conversion device, the second conversion device and the third conversion device are respectively connected to the first AC power source, the battery and the second AC power source, and receive power from the power supply they are connected to.

[0021] In an embodiment of the power supply device, the plurality of first power conversion devices may supply the DC power to the second power conversion device by operating any one of the first conversion device, the second conversion device and the third conversion device.

[0022] In one embodiment of the power supply device, when the power supply of the conversion device that supplies the DC power to the second power conversion device is interrupted, the multiple first power conversion devices can supply the DC power to the second power conversion device through other conversion devices except the conversion device.

[0023] In an embodiment of the power supply device, the power supply of the conversion device may be interrupted when an abnormal state is detected in any one or more of the conversion device, the power supply connected to the conversion device, and the rated value of the DC power supply.

[0024] In an embodiment of the power supply device, during a period in which the conversion device is switched to the other conversion device, the plurality of first power conversion devices may supply the DC power to the second power conversion device through the second conversion device.

[0025] In one embodiment of the power supply device, the at least one state may be at least one of a situation where the DC power supply changes from an initial state, a situation where the driving power supply changes from an initial state, a situation where the operation states of the plurality of first power conversion devices change, and a situation where the driving state of the load changes.

[0026] In one embodiment of the power supply device, the first circuit breaker can become a closed circuit when the DC power supply is connected between the first power supply terminal and the bus, and become an open circuit when the first power supply terminal and the bus are disconnected; the second circuit breaker can become a closed circuit when the DC power supply is connected between the first power supply terminal and the second power supply terminal, and become an open circuit when the first power supply terminal and the second power supply terminal are disconnected.

[0027] In one embodiment of the power supply device, when the power supply of the conversion device connected to the first AC power supply and the second AC power supply is interrupted, the first circuit breaker can be closed to connect the first power supply terminal and the bus, thereby allowing the DC power to be conducted from the bus to the first power supply terminal, and the second circuit breaker can be closed to connect the first power supply terminal and the second power supply terminal, thereby allowing the DC power to be conducted from the first power supply terminal to the second power supply terminal and supplied to the second power conversion device.

[0028] In one embodiment of the power supply device, after the power supply of the conversion device connected to the first AC power supply and the second AC power supply is interrupted, the DC power supply can be supplied to the second power conversion device by the conversion device connected to the battery until the DC power supply conducted from the bus is supplied to the second power conversion device.

[0029] In one embodiment of the power supply device, when the power supply of other power supply devices connected to the bus is interrupted, the first circuit breaker can become closed to connect the first power supply terminal and the bus, thereby allowing the DC power supply to be conducted from the first power supply terminal to the bus and supplied to the other power supply devices, and the second circuit breaker can become open to separate the first power supply terminal and the second power supply terminal, thereby disconnecting the first power supply terminal and the second power supply terminal.

[0030] In one embodiment of the power supply device, it may also include a control unit, which controls the plurality of first power conversion devices, the second power conversion device, the first circuit breaker, and the second circuit breaker, and monitors the abnormal conditions of at least one of the plurality of power supply sources, the plurality of first power conversion devices, the DC power supply, the drive power supply, and the load, and controls the first circuit breaker and the second circuit breaker according to the monitoring results so that one or more of the first power supply terminal and the second power supply terminal are connected to the bus.

[0031] In addition, another embodiment of the power supply device of the present invention, which uses the above-mentioned technical features as a means to solve the problem, includes: a plurality of first power conversion devices, which convert power received from each of a plurality of power supply sources into a DC power supply; one or more second power conversion devices, which convert the DC power supply into a driving power supply for driving a plurality of loads, and supply the driving power supply to the plurality of loads; a first circuit breaker, which is arranged between a first power supply terminal which is the output of any one converter of the plurality of first power conversion devices and the bus connected to the first power supply terminal, and limits the connection between the first power supply terminal and the bus; a second circuit breaker, which is arranged between the first power supply terminal and a second power supply terminal to which the outputs of the remaining converters of the plurality of first power conversion devices are commonly connected, and limits the connection between the first power supply terminal and the second power supply terminal; and a control unit, which controls the opening and closing of each of the first circuit breaker and the second circuit breaker according to the state of the DC power supply or the driving power supply, thereby controlling the reception / supply of the DC power based on the bus.

[0032] In an embodiment of the power supply device, the first circuit breaker may limit the connection between the first power terminal and the busbar by opening the circuit in normal times and closing the circuit when in operation.

[0033] In an embodiment of the power supply device, the second circuit breaker may limit the connection between the first power terminal and the second power terminal by closing the circuit in normal times and opening the circuit when in operation.

[0034] In one embodiment of the power supply device, the control unit can select any one of the plurality of first power conversion devices according to the status of the plurality of power supply sources, and control the selected converter to transmit the DC power to the one or more second power conversion devices respectively.

[0035] In one embodiment of the power supply device, when an abnormality occurs in any one or more of the converter that is transmitting the DC power to the one or more second power conversion devices and the power supply corresponding to the converter, the control unit can control the DC power to be transmitted to the one or more second power conversion devices by other converters other than the converter.

[0036] In one embodiment of the power supply device, when an abnormality occurs in two or more of the multiple power supply sources, the control unit can control the first circuit breaker and the second circuit breaker to close the circuit and receive the DC power from other power supply devices connected to the bus through the bus.

[0037] In one embodiment of the power supply device, when an abnormality occurs in other power supply devices connected to the bus, the control unit can control the first circuit breaker to close and the second circuit breaker to open, thereby allowing DC power to be supplied from the converter connected to the first circuit breaker to the other power supply devices through the bus.

[0038] On the other hand, an embodiment of the power supply system of the present invention as a means for solving the problems of the technical features described above includes: a plurality of power boards, which convert power received from each of a plurality of power supply sources into a DC power supply, and convert the DC power supply into a driving power supply for a load, and supply the load; a bus bar, to which first power supply terminals for inputting / outputting the DC power supply in each of the plurality of power boards are commonly connected, and the bus bar turns on the DC power supply converted in the plurality of power boards; a plurality of first circuit breakers, which are arranged between each of the first power supply terminals and the bus bar; and a plurality of second A circuit breaker is arranged between each second power supply terminal and the first power supply terminal, and the DC power supply is input from each of the plurality of power supply boards to the second power supply terminal through the first power supply terminal; the plurality of first circuit breakers change opening and closing according to the operating state of one or more power supply boards among the plurality of power supply boards, thereby connecting or limiting the DC power supply between the first power supply terminal and the bus; the plurality of second circuit breakers change opening and closing according to the operating state of one or more power supply boards among the plurality of power supply boards, thereby connecting or limiting the DC power supply between the first power supply terminal and the second power supply terminal.

[0039] In one embodiment of the power supply system, the plurality of power supply sources may include a first alternating current power supply for supplying AC power, a second alternating current power supply, and a battery power supply, the battery power supply storing DC power, and in the event of a power supply interruption of the first alternating current power supply and the second alternating current power supply, the stored power is supplied to the plurality of power boards while the power supply is switched and restored.

[0040] In one embodiment of the power supply system, after the power supply is interrupted, the battery power supply may continuously supply the stored power to the plurality of power strips until the power supply is switched and restored.

[0041] In one embodiment of the power supply system, the plurality of power supplies may further include an emergency power supply, which may supply emergency generated power to the load in the event of power interruption of the first AC power supply, the second AC power supply and the battery power supply.

[0042] In one embodiment of the power supply system, the plurality of power boards may respectively include: a plurality of first power conversion devices, which convert the power received from the plurality of power supply sources into the DC power supply; and a second power conversion device, which converts the DC power received from the plurality of first power conversion devices into the driving power supply and supplies it to the load.

[0043] In an embodiment of the power supply system, the plurality of power boards can supply the DC power to the second power conversion device through any one of the plurality of first power conversion devices according to the states of the plurality of power supply sources.

[0044] 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, the multiple power boards can supply the DC power to the second power conversion device through other conversion devices except the conversion device.

[0045] In one embodiment of the power supply system, during the period when the conversion device is switched to the other conversion device, the plurality of first power conversion devices may supply the DC power to the second power conversion device via a conversion device receiving power from the battery power source.

[0046] In one embodiment of the power supply system, the plurality of first circuit breakers can become closed circuit when the DC power supply is connected between the first power supply terminal and the busbar, and become open circuit when the first power supply terminal and the busbar are disconnected; the plurality of second circuit breakers can become closed circuit when the DC power supply is connected between the first power supply terminal and the second power supply terminal, and become open circuit when the first power supply terminal and the second power supply terminal are disconnected.

[0047] In one embodiment of the power supply system, among the plurality of first circuit breakers and the plurality of second circuit breakers, in the event of a power supply interruption in more than one of the plurality of power boards, the first circuit breaker, the second circuit breaker of the power board with the interrupted power supply and the first circuit breaker of the power board adjacent to the power board with the interrupted power supply become closed, thereby connecting the power board with the interrupted power supply and the adjacent power board to the busbar to supply the DC power from the adjacent power board to the power board with the interrupted power supply.

[0048] In one embodiment of the power supply system, after a power supply interruption, until the DC power supplied from the adjacent power board is supplied to the power board to which the power supply is interrupted, the power board to which the power supply is interrupted can receive the DC power from a conversion device connected to the battery power supply.

[0049] In an embodiment of the power supply system, the adjacent power board may be a power board adjacent to the power board with power supply interruption and having an inoperative conversion device for outputting the DC power to the first power terminal.

[0050] In one embodiment of the power supply system, it may also include a control device, which monitors the status of the multiple power boards and at least one of the first circuit breaker and the second circuit breaker, and controls the multiple power boards and at least one of the first circuit breaker and the second circuit breaker according to the monitoring results.

[0051] In addition, another embodiment of the power supply system of the present invention, which uses the above-mentioned technical features as a means to solve the problem, includes: a plurality of loads; a plurality of power supply boards, which convert the power received from each of the plurality of power supply sources into a DC power supply, and convert the DC power supply into a driving power supply for driving the plurality of loads, and supply the driving power supply to the plurality of loads; a bus, which is commonly connected to the bus as the first power supply end of the output of any one of the converters of the plurality of first power conversion devices that output the DC power from each of the plurality of power supply boards, and transmits the DC power converted by the one converter to the bus; a plurality of first circuit breakers, which are arranged on the plurality of power supply boards Between each of the first power terminals and the busbar connected to the first power terminals, the connection between the first power terminals and the busbar is limited; a plurality of second circuit breakers are arranged between the first power terminal and the second power terminal, the outputs of the remaining converters in the plurality of first power conversion devices of each of the plurality of power boards are commonly connected to the second power terminal, and the plurality of second circuit breakers limit the connection between the first power terminal and the second power terminal; and a control device controls the opening and closing of the first circuit breaker and the second circuit breaker according to the respective states of the plurality of power boards, thereby controlling the reception / supply of the DC power between the plurality of power boards through the busbar.

[0052] In an embodiment of the power supply system, the first circuit breaker may limit the connection between the first power terminal and the busbar by opening the circuit in normal times and closing the circuit when in operation.

[0053] In an embodiment of the power supply system, the second circuit breaker may limit the connection between the first power terminal and the second power terminal by closing the circuit in normal times and opening the circuit when in operation.

[0054] In one embodiment of the power supply system, the plurality of power boards can select any one of the plurality of first power conversion devices for converting the DC power supply according to the states of the plurality of power supply sources, and use the selected converter to transmit the DC power supply to one or more second power conversion devices for converting the driving power supply.

[0055] In one embodiment of the power supply system, when an abnormality occurs in any one or more of the converter that transmits the DC power to one or more second power conversion devices that convert the driving power and the power supply corresponding to the converter, the multiple power boards can transmit the DC power to the one or more second power conversion devices using other converters other than the converter.

[0056] 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 control the first circuit breaker, the second circuit breaker and the first circuit breaker of the power board where the abnormality occurs to be closed, thereby enabling the power board where the abnormality occurs to receive the DC power from the adjacent power board through the bus.

[0057] The power supply device and power supply system of the present invention as described above can be applied to power supply devices, power supply systems, and power supply system operation methods that supply / use DC power. In particular, it can be effectively applied to DC UPS modules and power supply systems provided with the DC UPS modules. However, the technology disclosed in this specification is not limited to this, and can also be applied to all power supply devices, power supply devices, power supply control devices, power supply systems, power systems, power control systems, factory systems, factory control systems, factory control methods, energy storage systems, energy storage system control methods or operation methods, motor control groups that control multiple motor loads, motor control systems, motor operation systems, etc. to which the technical ideas can be applied.

[0058] Effects of the Invention

[0059] According to the power supply device and power supply system of the present invention, the circuit breakers of the plurality of power supply devices connected to the power bus are controlled, thereby controlling the reception / supply of power through the power bus, thereby having the effect of being able to perform UPS functions between the plurality of power supply devices.

[0060] Therefore, even when various abnormal conditions occur in the power grid / system, it is possible to maintain uninterrupted power supply to the load.

[0061] That is, the power supply device and the power supply system according to the present invention have the effect of being able to establish appropriate and stable power supply countermeasures for various abnormal conditions occurring in the power grid / system.

[0062] In addition, according to the power supply device and power supply system of the present invention, the circuit breakers of the plurality of power supply devices connected to the power bus are controlled according to the situation that occurs, thereby controlling the reception / supply of power through the power bus, thereby achieving the effect of achieving effective operation with minimal means.

[0063] Furthermore, the power supply device and the power supply system according to the present invention have the effect of improving the stability, reliability and efficiency of large-capacity system operation.

[0064] As a result, the power supply device and the power supply system of the present invention solve the above-mentioned problems and have the effect of improving the limit of the conventional technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a structural diagram showing the structure of the power supply device of the present invention.

[0066] Figure 2 It is a structural diagram showing a specific circuit structure of the power supply device of the present invention.

[0067] Figure 3 It is a structural diagram showing the specific structural composition of the power supply device of the present invention.

[0068] Figure 4 It is a structural diagram showing the structure of a power supply system provided with the power supply device of the present invention.

[0069] Figure 5 This is an example showing a specific embodiment of the power supply system of the present invention. Figure 1 .

[0070] Figure 6 This is an example showing a specific embodiment of the power supply system of the present invention. Figure 2 .

[0071] Figure 7 This is an example showing a specific embodiment of the power supply system of the present invention. Figure 3 .

[0072] Figure 8 This is an example showing a specific embodiment of the power supply system of the present invention. Figure 4 . DETAILED DESCRIPTION

[0073] It should be noted that the technical terms used in this specification are only used to illustrate specific embodiments and are not used 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 as the meanings commonly understood by those of ordinary skill in the art, and should not be interpreted as excessive generalizations or excessive reductions. In addition, when the technical terms used in this specification are erroneous technical terms that cannot accurately express the technical ideas disclosed in this specification, they should be replaced and understood by technical terms that can be correctly understood by those skilled in the art. In addition, the common terms used in this specification should be interpreted according to dictionary definitions or according to the preceding and following articles, and should not be interpreted with excessively reduced meanings.

[0074] In addition, unless the context clearly indicates a different meaning, the singular expression shall include the plural expression. In this specification, the terms "compose" or "include" shall not be interpreted as necessarily including all the various constituent elements or steps described in the specification, but shall be interpreted as not excluding some of the constituent elements or steps, or additional constituent elements or steps may be included.

[0075] Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, and the same or similar components are given the same reference numerals regardless of the figure numbers, and repeated descriptions thereof will be omitted.

[0076] In addition, in the process of describing the technology disclosed in this specification, when it is determined that the specific description of the relevant known technology will make the technical gist disclosed in this specification unclear, the detailed description thereof will be omitted. In addition, it should be noted that the drawings are only for easy understanding of the technical ideas disclosed in this specification, and the technical ideas of the present invention should not be limited by the drawings.

[0077] First, the power supply device of the present invention will be described.

[0078] The embodiments of the power supply device described below may be implemented independently, or may be implemented in combination with the embodiments of the control system described below.

[0079] The power supply device may be implemented in a combination with or in a different form from the following embodiments.

[0080] The power supply device may be a module including a plurality of power supply control devices.

[0081] The power supply device may be a power supply device encapsulating the plurality of power supply control devices.

[0082] For example, the power supply device may be a power board encapsulating the plurality of power control devices.

[0083] The power supply device may be a packaged power board installed in a building requiring high power, such as a power plant, large equipment, factory, building, or apartment, to supply power.

[0084] The power supply device may also be a packaged power board arranged in a certain space.

[0085] The power supply device may encapsulate the plurality of power supply control devices and supply power to a load.

[0086] like Figure 1As shown, the power supply device 100 (hereinafter referred to as the supply device) includes: a plurality of first power conversion devices 110, which convert the power received from each of the plurality of power supply sources 10 into a DC power supply; one or more second power conversion devices 120, which convert the DC power supply into a driving power supply and supply it to a load 20; a first circuit breaker 130a, which is arranged between a first power supply terminal and a bus 1, the first power supply terminal is connected to the output terminal of any one of the plurality of first power conversion devices 110 to input / output the DC power supply, and the bus 1 is connected to the first power supply terminal to allow the DC power supply to pass; and a second circuit breaker 130b, which is arranged between the first power supply terminal and the second power supply terminal, the second power supply terminal is connected to the remaining output terminals of the plurality of first power conversion devices 110 and the input terminal of the second power conversion device 120 to input / output the DC power supply, and the second circuit breaker 130b connects or disconnects the first power supply terminal and the second power supply terminal.

[0087] In the supply device 100, the first circuit breaker 130a can change the opening and closing according to the state of at least one of the DC power supply, the driving power supply, the plurality of first power conversion devices 110 and the load 20, thereby connecting or limiting the DC power supply between the first power supply terminal and the bus 1. The second circuit breaker 130b changes the opening and closing according to the state of any one of the DC power supply, the driving power supply, the plurality of first power conversion devices 110 and the load 20, thereby connecting or limiting the DC power supply between the first power supply terminal and the second power supply terminal.

[0088] In this way, the supply device 100 includes the plurality of first power conversion devices 110, the one or more second power conversion devices 120, and the first circuit breaker 130a, the second circuit breaker 130b, and converts the power received from the plurality of power supply sources 10 into the driving power and supplies it to the plurality of loads 20.

[0089] The specific structure of the supply device 100 including the plurality of first power conversion devices 110, the one or more second power conversion devices 120, the first circuit breaker 130a, and the second circuit breaker 130b can be as follows: Figure 2 and Figure 3 shown.

[0090] The plurality of power supply sources 10 that supply power to the supply device 100 may be externally connected to the plurality of first power conversion devices 110 , respectively, and supply power to the plurality of first power conversion devices 110 , respectively.

[0091] Each of the plurality of power supply sources 10 may be connected to each of the plurality of first power conversion devices 110 , and supply a DC power source or an AC power source to each of the plurality of first power conversion devices 110 .

[0092] The plurality of power supply sources 10 may include power supply sources different from each other.

[0093] like Figure 2 and Figure 3 As shown, the plurality of power supply sources 10 may include a first alternating current power source 10 # 1 and a second alternating current power source 10 # 3 that supply AC power.

[0094] The plurality of power supply sources 10 may further include a battery 10#2 storing DC power.

[0095] Preferably, Figure 2 and Figure 3 As shown, the plurality of power supply sources 10 include three different power supply sources 10#1 to #3, and the three different power supply sources 10#1 to #3 can be the first AC power supply 10#1 for supplying AC power, the battery 10#2 storing DC power, and the second AC power supply 10#3 for supplying AC power.

[0096] According to this, the supply device 100 can receive more than two AC power sources and more than one DC power source.

[0097] The first AC power source 10#1 may be a grid power source G.

[0098] The first AC power source 10#1 may be a grid power source G that supplies 440V AC power.

[0099] The second AC power source 10#3 may be a bypass power source P.

[0100] The second AC power source 10#3 may be a bypass power source P that supplies 440V AC power.

[0101] The battery 10#2 may be an emergency battery that stores DC power and supplies the stored DC power in an emergency situation.

[0102] When an abnormality occurs in the first AC power source and the second AC power source, the battery 10 # 2 can supply the stored DC power to the supply device 100 .

[0103] Therefore, when the supply of the DC power to the second power conversion device 120 is interrupted, the plurality of power supply sources 10 can supply the power stored in the battery 10 # 2 to the first power conversion device 110 while the supply of the DC power is being restored.

[0104] Here, the supply interruption of the DC power supply may be one or more of the following: the power supply of the first AC power supply 10#1 and the second AC power supply 10#3 is interrupted, and the operation of the plurality of first power conversion devices 110 receiving power from the first AC power supply 10#1 and the second AC power supply 10#3 is interrupted.

[0105] After the supply of the DC power source is interrupted, until the supply of the DC power source is switched and restored, the stored power may be continuously supplied to the first power conversion device 110 by the battery 10#2.

[0106] The uninterrupted supply means that the stored power is provided to the first power conversion device 110 so that the power supply is not interrupted, that is, no power outage occurs.

[0107] Therefore, the supply device 100 can realize uninterrupted power supply to the load 20 through the battery 10#2, thereby being able to supply power to the load 20 uninterruptedly.

[0108] The plurality of first power conversion devices 110 may be plural.

[0109] The first power conversion device 110 may be a device that converts received power into DC power. For example, the first power conversion device 110 may be a converter.

[0110] The plurality of first power conversion devices 110 may be plural.

[0111] The first power conversion device 110 may be a device that converts received power into DC power. For example, the first power conversion device 110 may be a converter.

[0112] The first power conversion device 110 may be an AC / DC converter that converts AC power into DC power, or a DC / DC converter that converts DC power into DC power.

[0113] The plurality of first power conversion devices 110 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.

[0114] The plurality of first power conversion devices 110 may include a first conversion device 110#1 to a third conversion device 110#3, wherein the first conversion devices 110#1 to the third conversion devices 110#3 are respectively connected to the first AC power source 10#1, the battery 10#2 and the second AC power source 10#3, and receive power from the power supply they are connected to.

[0115] The plurality of first power conversion devices 110 may include three conversion devices 110 # 1 to 110 # 3 corresponding to each of the plurality of power supply sources 10 .

[0116] According to this, the first AC power supply 10#1 can be connected to the first conversion device 110#1 and supply AC power to the first conversion device 110#1, the battery 10#2 can be connected to the second conversion device 110#2 and supply DC power to the second conversion device 110#2, and the second AC power supply 10#3 can be connected to the third conversion device 110#3 and supply AC power to the third conversion device 110#3.

[0117] The first conversion device 110#1 may be an AC / DC conversion device that converts AC power into DC power, the second conversion device 110#2 may be a DC / DC conversion device that converts the level of DC power, and the third conversion device 110#3 may be an AC / DC conversion device that converts AC power into DC power.

[0118] Each of the plurality of first power conversion devices 110 may include an opening and closing unit, and the opening and closing units are respectively disposed at the front end and the rear end of the plurality of first power conversion devices 110 to open and close the connection.

[0119] The on-off unit may be a switch, which is respectively disposed at the input end and the first power supply end of each of the plurality of first power conversion devices 110 to limit the power input / output to the plurality of first power conversion devices 110 .

[0120] Here, the switching unit provided at the input end may be a circuit breaker for detecting overcurrent and disconnecting the circuit.

[0121] In more detail, an AC air circuit breaker (ACB: Air Circuit Breaker) may be provided at the input end of the first conversion device 110#1 and the third conversion device 110#3 that receive AC power from the first AC power source 10#1 and the second AC power source 10#3, and a DC wiring circuit breaker (MCCB: Molded Circuit Breaker) may be provided at the input end of the second conversion device 110#2 that receives DC power from the battery 10#2.

[0122] The switching unit may switch on and off the connection of the plurality of first power conversion devices 110 according to the operations of the plurality of first power conversion devices 110 .

[0123] For example, when power is not received from the plurality of power supply sources 10 , the connection of the corresponding conversion device 110 may be disconnected by opening the switch units provided at the respective input terminals and the output terminals.

[0124] The outputs of each of the plurality of first power conversion devices 110 may be connected to one output terminal.

[0125] Here, the one output terminal may be connected to the first power terminal and the second power terminal.

[0126] The first power source end may be an output of any one of the plurality of first power conversion devices 110 .

[0127] Therefore, the first power supply terminal may be a circuit connected to the output of any one of the plurality of first power conversion devices 110 and allowing the DC power output from the conversion device to flow.

[0128] The first power supply terminal is connected to the second power supply terminal and the bus 1 , so that the DC power output from the conversion device can be transmitted to the second power supply terminal and the bus 1 .

[0129] The conversion device is any one of the plurality of first power conversion devices 110 , for example, the conversion device may be the third conversion device 110 # 3 that receives power from the second AC power source 10 # 2 .

[0130] like Figure 2 and Figure 3 As shown, preferably, the conversion device can be the third conversion device 110#3 that receives power from the bypass power supply P serving as the second AC power supply 10#2.

[0131] That is, the conversion device may be the third conversion device 110#3, and the first power supply end may be the output end of the third conversion device 110#3.

[0132] The second power terminal may be an output of the remaining conversion devices among the plurality of first power conversion devices 110 .

[0133] Therefore, the second power terminal may be a circuit connected to the output of the remaining conversion devices among the plurality of first power conversion devices 110 and allowing the DC power output from the remaining conversion devices to flow.

[0134] The second power supply terminal is connected to the first power supply terminal and the one or more second power conversion devices 120 respectively, so that the DC power output from the remaining conversion devices can be transmitted to the first power supply terminal and the one or more second power conversion devices 120.

[0135] The remaining conversion devices are the remaining conversion devices in the plurality of first power conversion devices 110 except the conversion device, for example, they may be the first conversion device 110#1 and the second conversion device 110#2 that receive power from the first AC power source 10#1 and the battery 10#2.

[0136] like Figure 2 and Figure 3 As shown, preferably, the remaining conversion devices can be, in addition to the third conversion device 110#3 that receives power from the bypass power supply P as the second AC power supply 10#2, the first conversion device 110#1 and the second conversion device 110#2 that receive power from the grid power supply G as the first AC power supply 10#1 and the battery power supply B as the battery 10#2.

[0137] That is, the remaining conversion devices may be the first conversion device 110#1 and the second conversion device 110#2, and the second power supply terminal may be a power supply terminal to which the outputs of the first conversion device 110#1 and the second conversion device 110#2 are commonly connected.

[0138] In this way, the first power supply end and the second power supply end outputting the DC power from the plurality of first power conversion devices 110 can transmit the DC power to the bus 1 and the one or more second power conversion devices 120 , respectively.

[0139] That is, the first power supply terminal can be connected to the second power supply terminal and the bus 1 and enable the DC power to be transmitted to the second power supply terminal and the bus 1, and the second power supply terminal can enable the DC power to be transmitted to the first power supply terminal and one or more second power conversion devices 120.

[0140] At this time, the first power supply end can transmit the DC power output from the third conversion device 110#3 or received from the bus 1 to the second power supply end, and the second power supply end transmits the DC power received from the first power supply end to the one or more second power conversion devices 120.

[0141] That is, the DC power converted and outputted by each of the plurality of first power conversion devices 110 may be transmitted to each of the one or more second power conversion devices 120 .

[0142] The plurality of first power conversion devices 110 may supply the DC power to the second power conversion device 120 by operating any one of the first conversion device 110 # 1 to the third conversion device 110 # 3 .

[0143] In the supply device 100, in the event that the power supply of the conversion devices 110#1 to 110#3 that supply the DC power supply to the second power conversion device 120 is interrupted, the plurality of first power conversion devices 110 can supply the DC power supply to the second power conversion device 120 through other conversion devices except the conversion devices 110#1 to 110#3.

[0144] Here, the power supply interruption of the conversion devices 110#1 to 110#3 may be a situation where an abnormal state is detected in any one or more of the conversion devices 110#1 to 110#3, the power supply connected to the conversion devices 110# to 110#3, and the rated value of the DC power supply.

[0145] For example, when the rated value of the DC power output from the first conversion device 110#1 decreases below a specified reference while the first conversion device 110#1 connected to the first AC power supply 10#1 is supplying the DC power to the second power conversion device 120, the second conversion device 110#3, which is a conversion device other than the first conversion device 110#1, can supply the DC power to the second power conversion device 120.

[0146] In this case, during the period when the conversion devices 110 # 1 to 110 # 3 are switched to the other conversion devices, the plurality of first power conversion devices 110 supply the DC power to the second power conversion device 120 through the second conversion device 110 # 2 connected to the battery 10 # 2.

[0147] That is, when the supply of the DC power to the second power conversion device 120 is interrupted, the second conversion device 110#2 connected to the battery 10#2 supplies the DC power to the second power conversion device 120 until the supply of the DC power is switched and restored.

[0148] The second power conversion device 120 may be plural.

[0149] The second power conversion device 120 is a device that converts the received DC power into the driving power. For example, the second power conversion device 120 may be an inverter.

[0150] The second power conversion device 120 may convert the DC power received from the plurality of first power conversion devices 110 into the driving power.

[0151] In the case where the load is a load driven by an AC power source, the second power conversion device 120 may be an inverter that converts the DC power received from the first power conversion device 110 into an AC driving power source.

[0152] In the case where the load is a load driven by a DC power source, the second power conversion device 120 may be an inverter that converts the DC power source received from the first power conversion device 110 into a DC driving power source.

[0153] The number of the second power conversion devices 120 may correspond to the number of the loads 20 .

[0154] The load 20 may be plural.

[0155] The second power conversion device 120 may include three or more inverters 120 # 1 to 120 # 3 corresponding to the load 20 .

[0156] Each of the second power conversion devices 120 may be connected to each of the loads 20 , and supply the driving power to the connected loads.

[0157] A front end of each of the second power conversion devices 120 may be provided with an opening and closing unit for opening and closing the connection.

[0158] The opening and closing unit may be a switch, which is disposed at each input end of the second power conversion device 120 to limit the power input to the second power conversion device 120 .

[0159] Here, the switching unit provided at the input end may be a circuit breaker for detecting overcurrent and disconnecting the circuit.

[0160] The driving power converted and output by the second power conversion device 120 can be transmitted to each of the loads 20 .

[0161] Here, the load 20 may include an electric motor M load.

[0162] The first circuit breaker 130a and the second circuit breaker 130b may be DC circuit breakers for disconnecting a DC power source.

[0163] In the first circuit breaker 130a and the second circuit breaker 130b, the first circuit breaker 130a can be arranged between the first power supply terminal and the bus 1, the first power supply terminal is the output terminal of any one of the plurality of first power conversion devices 110, and the bus 1 is connected to the first power supply terminal.

[0164] Here, the conversion device may be the third conversion device 110#3, and the first power supply terminal may be an output terminal connected to the output of the third conversion device 110#3.

[0165] That is, the first circuit breaker 130 a may be disposed between the first power terminal of the supply device 100 and the bus bar 1 to limit the connection between the supply device 100 and the bus bar 1 .

[0166] According to this, the supply device 100 is connected to the bus 1 through the first power supply terminal, and the connection with the bus 1 is restricted by the opening and closing of the first circuit breaker 130a.

[0167] The first circuit breaker 130a can limit the connection between the first power terminal and the bus 1 by forming an open circuit in normal times and a closed circuit when operating.

[0168] That is, the first circuit breaker 130a can disconnect the first power supply terminal and the bus bar 1 in normal times, and connect the first power supply terminal and the bus bar 1 when in operation.

[0169] Therefore, when the first circuit breaker 130a is not operated, the first power supply terminal and the bus 1 can form an open circuit to disconnect, and when the first circuit breaker 130a is operated, the first power supply terminal and the bus 1 can form a closed circuit to connect.

[0170] In the first circuit breaker 130a and the second circuit breaker 130b, the second circuit breaker 130b can be arranged between the second power supply terminal and the first power supply terminal connected to the second power supply terminal, and the second power supply terminal is the output terminal of the remaining conversion devices in the plurality of first power conversion devices 110.

[0171] Here, the remaining conversion devices may be the first conversion device 110#1 and the second conversion device 110#2, and the second power supply terminal may be an output terminal to which the outputs of the first conversion device 110#1 and the second conversion device 110#2 are commonly connected.

[0172] That is, the second circuit breaker 130b may be disposed between the first power terminal and the second power terminal of the supply device 100 and restrict the connection between the first power terminal and the second power terminal.

[0173] According to this, the supply device 100 can be connected to the bus bar 1 through the second power supply terminal, and the connection with the bus bar 1 is restricted by the opening and closing of the second circuit breaker 130b.

[0174] The second circuit breaker 130b may limit the connection between the first power terminal and the second power terminal by closing the circuit in normal times and opening the circuit when operating.

[0175] That is, the second circuit breaker 130b can connect the first power supply terminal and the second power supply terminal in normal times, and disconnect the first power supply terminal and the second power supply terminal when in operation.

[0176] Therefore, when the second circuit breaker 130b is not operated, a closed circuit is formed between the first power supply terminal and the second power supply terminal to form a connection, and when the second circuit breaker 130b is operated, an open circuit is formed between the first power supply terminal and the second power supply terminal to disconnect.

[0177] The bus 1 may be a DC bus for DC power to flow.

[0178] The bus bar 1 may refer to a DC dedicated circuit in which a plurality of power sources are connected together to transfer power.

[0179] The bus bar 1 may be connected to a plurality of DC power sources, and DC power supplied from the plurality of DC power sources may be transmitted to the bus bar 1 .

[0180] For example, the DC power supply can be transferred between the supply device 100 and other power supply devices by connecting to other power supply devices except the supply device 100 .

[0181] The busbar 1 may be configured such that a rated value thereof is a size of a DC power source supplied from at least one conversion device 110 to a size of a DC power source supplied from two conversion devices 110 .

[0182] That is, the rated value of the bus bar 1 may be a rated value capable of achieving the transfer of the DC power supplied from at least two conversion devices 110 .

[0183] The bus bar 1 may be constructed with a rated size capable of transferring DC power between all power boards connected to the bus bar 1 .

[0184] The bus bar 1 may allow the DC power to flow according to the opening and closing of the first circuit breaker 130 a .

[0185] The first circuit breaker 130a, which is arranged between the first power supply terminal and the bus 1 and limits the connection between the first power supply terminal and the bus 1, can disconnect the first power supply terminal and the bus 1 by forming an open circuit in normal times, and connect the first power supply terminal and the bus 1 by forming a closed circuit when in action.

[0186] That is, when the first circuit breaker 130a is actuated to form a closed circuit and the first power supply terminal and the bus 1 are connected, the DC power transmitted from the first power supply terminal can flow in the bus 1, or the DC power is transmitted to the first power supply terminal and flows.

[0187] The bus bar 1 can realize the transmission of the DC power according to the opening and closing of the second circuit breaker 130b.

[0188] The second circuit breaker 130b, which is arranged between the first power supply terminal and the second power supply terminal and limits the connection between the first power supply terminal and the second power supply terminal, can connect the first power supply terminal and the second power supply terminal by forming a closed circuit in normal times, and disconnect the first power supply terminal and the second power supply terminal by forming an open circuit when in action.

[0189] That is, when the second circuit breaker 130b does not operate to form a closed circuit and the first power supply terminal and the second power supply terminal are connected, the DC power can be transmitted and flow to the first power supply terminal and the second power supply terminal. When the second circuit breaker 130b operates to form an open circuit and the first power supply terminal and the second power supply terminal are disconnected, the DC power transmitted from the first power supply terminal will flow in the bus 1.

[0190] The first circuit breaker 130a and the second circuit breaker 130b can be DC dedicated wiring circuit breakers (MCCB: Molded Case Circuit breaker), the first circuit breaker 130a is configured between the first power supply terminal and the bus 1 and limits the connection between the first power supply terminal and the bus 1, and the second circuit breaker 130b is configured between the first power supply terminal and the second power supply terminal and limits the connection between the first power supply terminal and the second power supply terminal.

[0191] The first circuit breaker 130 a and the second circuit breaker 130 b may limit the connection of the bus bar 1 .

[0192] The first circuit breaker 130a can change opening and closing according to the status of at least one of the DC power supply, the driving power supply, the plurality of first power conversion devices 110 and the load 20, and connect or limit the DC power supply between the first power supply terminal and the bus 1.

[0193] The second circuit breaker 130b can change opening and closing according to the status of at least one of the DC power supply, the driving power supply, the plurality of first power conversion devices 110 and the load 20, and connect or limit the DC power supply between the first power supply terminal and the second power supply terminal.

[0194] Here, the at least one state may be at least one of a situation where the DC power supply changes from an initial state, a situation where the driving power supply changes from an initial state, a situation where the operation states of the plurality of first power conversion devices 110 change, and a situation where the driving state of the load 20 changes.

[0195] For example, the at least one state may be a situation where the DC power supply or the driving power supply becomes below a reference rated value, a situation where a failure / accident occurs in the plurality of first power conversion devices 110 causing a change in the operating state, or a situation where the driving power supplied to the load 20 becomes smaller causing a change in the driving state of the load 20.

[0196] As for the first circuit breaker 130 a , a closed circuit may be formed when the DC power source is connected between the first power source terminal and the bus bar 1 , and an open circuit may be formed when the first power source terminal and the bus bar 1 are disconnected.

[0197] As for the second circuit breaker 130b, a closed circuit may be formed when the DC power source is connected between the first power source terminal and the second power source terminal, and an open circuit may be formed when the first power source terminal and the second power source terminal are disconnected.

[0198] When the power supply of the conversion devices 110#1 and 110#3 connected to the first AC power source 10#1 and the second AC power source 10#3 is interrupted, the first circuit breaker 130a can form a closed circuit to connect the first power source end and the bus 1, thereby enabling the DC power source to be conducted from the bus 1 to the first power source end.

[0199] When the power supply of the conversion devices 110#1 and 110#3 connected to the first AC power supply 10#1 and the second AC power supply 10#3 is interrupted, the second circuit breaker 130b can form a closed circuit to connect the first power supply end and the second power supply end, thereby allowing the DC power to be conducted from the first power supply end to the second power supply end and supplied to the second power conversion device 120.

[0200] In this case, after the power supply of the conversion devices 110#1 and 110#3 connected to the first AC power supply 10#1 and the second AC power supply 10#3 is interrupted, the conversion device 110#2 connected to the battery 10#2 can supply the DC power to the second power conversion device 120 until the DC power conducted from the bus 1 is supplied to the second power conversion device 120.

[0201] That is, the conversion device 110#2 connected to the battery 10#2 can maintain the supply of the DC power to the second power conversion device 120 until the supply of the DC power to the second power conversion device 120 is switched and restored.

[0202] In the event that power is interrupted to other power supply devices connected to the bus 1, the first circuit breaker 130a can form a closed circuit to connect the first power supply terminal and the bus 1, thereby allowing the DC power to be conducted from the first power supply terminal to the bus 1 and supplied to the other power supply devices.

[0203] In the event of a power outage in other power supply devices connected to the bus 1 , the second circuit breaker 130 b may form an open circuit to limit the first power terminal and the second power terminal, thereby disconnecting the first power terminal and the second power terminal.

[0204] That is, in the event that the power supply of other power supply devices connected to the bus 1 is interrupted, the first circuit breaker 130a can form a closed circuit to connect the first power supply terminal and the bus 1 only when the second circuit breaker 130b is open, so that conduction can be enabled from the first power supply terminal to the bus 1.

[0205] As described above, the supply device 100 including the plurality of first power conversion devices 110, the second power conversion device 120, and the first circuit breaker 130a, the second circuit breaker 130b may also include a control unit 140, the control unit 140 controls the plurality of first power conversion devices 110, the second power conversion device 120, the first circuit breaker 130a, the second circuit breaker 130b, and monitors the abnormal status of at least one of the plurality of power supply sources 10, the plurality of first power conversion devices 110, the DC power supply, the drive power supply and the load, and controls the first circuit breaker 130a, the second circuit breaker 130b to connect one or more of the first power supply terminal and the second power supply terminal to the bus 1 according to the monitoring result.

[0206] The control unit 140 may be a central control device of the supply device 100 .

[0207] The control unit 140 may include a plurality of control units for controlling the supply device 100 .

[0208] In addition, the control unit 140 may further include a plurality of electronic devices for executing the functions of the supply device 100 .

[0209] For example, the control unit 140 may include at least one of a storage unit storing software / applications / programs for executing and controlling functions of the supply device 100 , a dedicated control unit including the storage unit, a communication unit, a display unit, and an input unit.

[0210] The control unit 140 may control the plurality of first power conversion devices 110 , the one or more second power conversion devices 120 , and the first circuit breaker 130 a and the second circuit breaker 130 b .

[0211] The control unit 140 may include a programmable logic controller (PLC) for controlling the plurality of first power conversion devices 110 , the one or more second power conversion devices 120 , and the first circuit breaker 130 a and the second circuit breaker 130 b .

[0212] The control unit 140 can monitor the states of the plurality of first power conversion devices 110, the one or more second power conversion devices 120, and the first circuit breakers 130a and the second circuit breakers 130b, and control the operations of the plurality of first power conversion devices 110, the one or more second power conversion devices 120, and the first circuit breakers 130a and the second circuit breakers 130b according to the monitoring results.

[0213] The control unit 140 may also control the operations of the plurality of first power conversion devices 110 , the one or more second power conversion devices 120 , and the first circuit breakers 130 a and the second circuit breakers 130 b according to the states of the plurality of power supply sources 10 and the plurality of loads 20 .

[0214] The control unit 140 may control the conversion and supply of the DC power by controlling the operations of each of the plurality of first power conversion devices 110 .

[0215] For example, the control unit 140 may control the operation of the control target conversion device in the plurality of first power conversion devices 110 so as to control the DC power to be converted by the control target conversion device and supplied to the one or more second power conversion devices 120 .

[0216] The control unit 140 may further control the opening and closing of each opening and closing unit included in the plurality of first power conversion devices 110 .

[0217] The control unit 140 may control the conversion and supply of the driving power by controlling the operations of each of the one or more second power conversion devices 120 .

[0218] For example, the control unit 140 may control the operation of the control target conversion device in the one or more second power conversion devices 120 to convert and supply the driving power to the plurality of loads 20 through the control target conversion device.

[0219] The control unit 140 may further control the opening and closing of each of the opening and closing units included in the one or more second power conversion devices 120 .

[0220] The control unit 140 may control the receiving and supplying of the DC power by controlling the operations of the first circuit breaker 130a and the second circuit breaker 130b.

[0221] For example, the control unit 140 may control the bus 1 to receive the DC power from the bus 1 by closing the first circuit breaker 130a and the second circuit breaker 130b, or to supply the DC power to the bus 1 by opening the second circuit breaker 130b.

[0222] In this case, the control unit 140 may control the first circuit breaker 130a and the second circuit breaker 130b according to whether the DC power is received / supplied.

[0223] For example, when the control is to receive the DC power from the bus 1, the first circuit breaker 130a and the second circuit breaker 130b can be closed, and when the control is to supply the DC power to the bus 1, the first circuit breaker 130a is opened and the second circuit breaker 130b is closed.

[0224] The control unit 140 can also communicate with any one or more external communication devices and control devices, and control the operation of the multiple first power conversion devices 110, the one or more second power conversion devices 120, and the first circuit breaker 130a and the second circuit breaker 130b according to the communication results.

[0225] For example, the control unit 140 can receive a control instruction for controlling the operation of the plurality of first power conversion devices 110, the one or more second power conversion devices 120, and any one or more of the first circuit breakers 130a and the second circuit breakers 130b from the control device, and control the operation of the plurality of first power conversion devices 110, the one or more second power conversion devices 120, and any one or more of the first circuit breakers 130a and the second circuit breakers 130b according to the control instruction.

[0226] The control unit 140 may be controlled to receive power from any one of the plurality of power supply sources 10 and convert the power into the DC power.

[0227] That is, the control unit 140 may be controlled to selectively receive power from any one of the plurality of power supply sources 10 .

[0228] The control unit 140 may control the power received from any one of the plurality of power supply sources 10 to convert the power into the DC power according to a preset supply reference.

[0229] The supply reference may be a reference for a power supply priority order of the plurality of power supply sources 10 .

[0230] For example, the first AC power source 10#1, the second AC power source 10#3, and the battery 10#3 may be set in this order.

[0231] When the supply reference is as described above, the control unit 140 may control the first AC power source 10 # 1 , the second AC power source 10 # 3 , and the battery 10 # 3 to supply power in this order.

[0232] When power is supplied from the first AC power source 10 # 1 , the control unit 140 may control the operation of the first conversion device 110 # 1 connected to the first AC power source 10 # 1 .

[0233] In this case, the control unit 140 can connect the first conversion device 110#1 and disconnect the second conversion device 110#2 and the third conversion device 110#3 by closing the opening and closing unit of the first conversion device 110#1 and opening the opening and closing units of the second conversion device 110#2 and the third conversion device 110#3.

[0234] When receiving power from the second AC power source 10 # 3 , the control unit 140 may control the operation of the third conversion device 110 # 3 connected to the second AC power source 10 # 3 .

[0235] In this case, the control unit 140 can connect only the third conversion device 110#3 and disconnect the first conversion device 110#1 and the second conversion device 110#2 by closing the opening and closing unit of the third conversion device 110#3 and opening the opening and closing units of the first conversion device 110#1 and the second conversion device 110#2.

[0236] When receiving power from the battery 10 # 2 , the control unit 140 may control the operation of the second conversion device 110 # 2 connected to the battery 10 # 2 .

[0237] In this case, the control unit 140 can connect only the second conversion device 110#2 and disconnect the first conversion device 110#1 and the third conversion device 110#3 by closing the opening and closing unit of the second conversion device 110#2 and opening the opening and closing units of the first conversion device 110#1 and the third conversion device 110#3.

[0238] The control unit 140 controls to select any one of the plurality of first power conversion devices 110 according to the states of the plurality of power supply sources 10 , and to have the selected conversion device 110 transmit the DC power to each of the one or more second power conversion devices 120 .

[0239] That is, the control unit 140 may control the DC power to be converted by a selected one of the plurality of first power conversion devices 110 and transmitted to the one or more second power conversion devices 120 .

[0240] For example, when an abnormality occurs in the first AC power source 10#1 and the second AC power source 10#3 in the multiple power supply sources 10, the control unit 140 can be controlled to select the second conversion device 110#2 connected to the battery 10#2, and enable the second conversion device 110#2 to receive power from the battery 10#2 and convert it into the DC power supply, and transmit the DC power to the one or more second power conversion devices 120.

[0241] When an abnormality occurs in any one or more of the conversion device 110 that is transmitting the DC power to the one or more second power conversion devices 120 and the power supply 10 corresponding to the conversion device 110, the control unit 140 can control the DC power to be transmitted to the one or more second power conversion devices 120 by other conversion devices 110 except the conversion device 110.

[0242] When an abnormality occurs in one or more of the conversion device 110 that is transmitting the DC power to the one or more second power conversion devices 120 and the power supply source 10 corresponding to the conversion device 110, the control unit 140 can switch the power supply source 10 and the conversion device 110 that are supplying power so that the DC power is transmitted to the one or more second power conversion devices 120 by other conversion devices 110 except the conversion device 110.

[0243] For example, when the first conversion device 110#1 fails or is turned off while receiving power from the first AC power supply 10#1 and converting the DC power supply using the first conversion device 110#1, the first AC power supply 10#1 in power supply can be switched to the second AC power supply 10#3, and the first conversion device 110#1 can be switched to the third conversion device 110#3, so that power is received from the second AC power supply 10#3, and the DC power is converted by the third conversion device 110#3 and transmitted to the inverter 120.

[0244] As described above, the control unit 140 that controls the plurality of first power conversion devices 110, the one or more second power conversion devices 120, and the first circuit breakers 130a and the second circuit breakers 130b controls the opening and closing of the first circuit breakers 130a and the second circuit breakers 130b respectively according to the state of the DC power supply or the driving power supply, thereby controlling the reception / supply of the DC power supply based on the bus 1.

[0245] For example, when the size of the driving power supply is smaller than the required size of the plurality of loads 20 or the DC power supply is insufficient, the first circuit breaker 130a and the second circuit breaker 103b can be controlled to be closed, thereby receiving the DC power supply from the bus 1.

[0246] Alternatively, when the size of the driving power source is larger than the required size of the plurality of loads 20 or the DC power source is sufficient, the first circuit breaker 130a may be controlled to be closed, thereby supplying the DC power source to the bus 1.

[0247] As a contrary case, when a fault occurs in the plurality of first power conversion devices 110 or the one or more second power conversion devices 120 causing a fault current to flow at the output end, or when an abnormality occurs in the plurality of power supply sources 10 or the plurality of loads 20 causing the fault current to flow at the output end, the fault current can be prevented from being supplied to the bus 1 by opening the first circuit breaker 130a.

[0248] When an abnormality occurs in the plurality of power supply sources 10 , the control unit 140 may control the first circuit breaker 130 a and the second circuit breaker 130 b to be closed, so that the DC power can be received from other power supply devices connected to the bus 1 through the bus 1 .

[0249] When an abnormality occurs in the plurality of power supply sources 10, the control unit 140 can be controlled to disconnect the plurality of power supply sources 10 and the plurality of first power conversion devices 110, so that the first circuit breaker 130a and the second circuit breaker 130b are closed, thereby receiving the DC power from other power supply devices connected to the bus 1 through the bus 1.

[0250] For example, when an abnormality occurs in the first AC power supply 10#1 and the second AC power supply 10#3 in the multiple power supply sources 10, the control unit 140 can be controlled to close the first circuit breaker 130a and the second circuit breaker 130b, thereby connecting the first power supply end and the second power supply end to the bus 1, and then receiving the DC power from other power supply devices connected to the bus 1 through the bus 1.

[0251] In this way, the first power supply end and the second power supply end can receive the DC power through the bus 1, and the first circuit breaker 130a can limit the reception of the DC power from the other power supply devices to the supply device 100 by opening and closing the connection between the first power supply end, the second power supply end and the bus 1 for receiving the DC power.

[0252] When an abnormality occurs in other power supply devices connected to the bus 1 , the control unit 140 can control the first circuit breaker 130 a to close and the second circuit breaker 130 b to open, thereby supplying DC power to the other power supply devices through the bus 1 .

[0253] When an abnormality occurs in other power supply devices connected to the bus 1, the control unit 140 can be controlled to further receive power from any one of the multiple power supply sources 10, and close the first circuit breaker 130a and open the second circuit breaker 130b, thereby supplying the DC power output from the first power supply end to the other power supply devices through the bus 1.

[0254] For example, when an abnormality occurs in the other power supply device while receiving power from the first AC power supply 10#1 among the multiple power supply sources 10, the control unit 140 can be controlled to disconnect the first power supply terminal and the second power supply terminal and connect the first power supply terminal and the bus 1 by opening the second circuit breaker 130b, and to supply the DC power converted by the third conversion device 110#3 to other power supply devices connected to the bus 1 through the bus 1 by controlling the third conversion device 110#3 that outputs the DC power to the first power supply terminal.

[0255] In this way, the first power supply end supplies the DC power through the bus 1, and the first circuit breaker 130a can limit the supply of the DC power from the supply device 100 to the other power supply devices by opening and closing the connection between the first power supply end and the bus 1 for supplying the DC power.

[0256] As described above, the supply device 100 for receiving / supplying the DC power by connecting to the bus 1 may include: Figure 4 The power supply system shown receives / supplies the DC power supply by connecting to the bus 1.

[0257] The power supply system of the present invention is described below, and contents overlapping with those described previously are omitted as much as possible.

[0258] In addition, in the description of the supply device 100, reference is made to Figures 1 to 3 Based on the above, additional reference is made to the embodiment of the power supply system shown in FIG. Figures 4 to 8 Explain and Figures 4 to 8 Reference numerals without reference numerals are indicated by Figures 1 to 3 The reference numerals shown are substituted and explained.

[0259] The embodiments of the power supply system described below may be implemented independently, or may be implemented in combination with the embodiments of the supply device 100 described above.

[0260] The power supply system may be implemented in a combination or different forms of the above embodiments and the following embodiments.

[0261] The power supply system may be a power supply system including a plurality of power supply devices.

[0262] The power supply system may be a system that includes a plurality of packaged power supply devices to provide power.

[0263] Here, the power supply device may be a power board encapsulating a plurality of power control devices.

[0264] The power supply system may include a plurality of the supply devices 100 described above.

[0265] That is, the supply device 100 may be applied to the power supply system for implementation, and the power supply system may include a plurality of the supply devices 100 for implementation.

[0266] like Figure 4 As shown, the power supply system 1000 (hereinafter referred to as the system) includes: a plurality of power boards 100, 200, 300, 400, which convert the power received from each of the plurality of power supply sources 10 into a DC power supply, convert the DC power supply into a driving power supply for a load 20 and supply it to the load 20; a bus 1, the first power supply terminals of each of the plurality of power boards 100, 200, 300, 400 outputting the DC power supply or inputting the DC power supply to the plurality of power boards 100, 200, 300, 400 are connected to the bus 1, so that The DC power converted in the plurality of power boards 100, 200, 300, 400 is turned on; a plurality of first circuit breakers 130a, 230a, 330a, 430a are arranged between each of the first power terminals and the bus 1; and a plurality of second circuit breakers 130b, 230b, 330b, 430b are arranged between each of the second power terminals and the first power terminal, and the second power terminal is the power terminal of the DC power input through the first power terminal in each of the plurality of power boards 100, 200, 300, 400.

[0267] In the system 1000, the plurality of first circuit breakers 130a, 230a, 330a, 430a change opening and closing according to the operating state of one or more power boards among the plurality of power boards 100, 200, 300, 400, thereby connecting or limiting the DC power supply between the first power supply terminal and the bus 1.

[0268] In the system 1000, the plurality of second circuit breakers 130b, 230b, 330b, 430b change opening and closing according to the operating state of one or more power boards among the plurality of power boards 100, 200, 300, 400, thereby connecting or limiting the DC power supply between the first power supply terminal and the second power supply terminal.

[0269] Here, each of the plurality of power boards 100, 200, 300, 400 may be as follows: Figures 1 to 3 The power supply device 100 is shown.

[0270] like Figures 1 to 3As shown, each of the plurality of power boards 100, 200, 300, 400 may include: a plurality of first power conversion devices 110, 210, 310, 410, which convert the power received from the plurality of power supply sources 10 into the DC power; one or more second power conversion devices 120, 220, 320, 420, which convert the DC power received from the plurality of first power conversion devices 110, 210, 310, 410 into the driving power and supply it to the load 20; and the first circuit breakers 130a, 230a, 330a, 430a and the second circuit breakers 130b, 230b, 330b, 430b.

[0271] Each of the plurality of power boards 100, 200, 300, 400 may also be provided with Figures 1 to 3 The power supply device 100 shown is realized in different configurations.

[0272] The system 1000 may include a plurality of power boards 100 , 200 , 300 , 400 , and the plurality of power boards 100 , 200 , 300 , 400 may be connected to a bus bar 1 in common.

[0273] The plurality of power boards 100, 200, 300, 400 may be plural, such as Figure 4 As shown, there may be more than four.

[0274] Preferably, the plurality of power boards 100 , 200 , 300 , 400 may be five or more.

[0275] Each of the plurality of power boards 100 , 200 , 300 , 400 can receive power from each of the plurality of power supply sources 10 and convert it into the DC power, and convert the DC power into the driving power to supply the driving power to each of the loads 20 .

[0276] Each of the plurality of power strips 100 , 200 , 300 , 400 may communicate with the control device 600 , and perform operations according to the communication results with the control device 600 .

[0277] For example, each of the plurality of power strips 100 , 200 , 300 , 400 may receive a control instruction from the control device 600 , and perform an action according to the control instruction, or transmit status information to the control device 600 .

[0278] like Figure 2 and Figure 3 As shown, the plurality of 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.

[0279] Here, the first AC power source 10#1 may be a main grid power source G supplying AC power, the second AC power source 10#3 may be a bypass system power source P supplying AC power, and the battery power source 10#2 may be a battery power source B supplying DC power.

[0280] That is, Figure 4 As shown, the plurality of power sources 10 may include a grid power source G, a bypass power source P and a battery power source B.

[0281] Therefore, each of the plurality of power boards 100 , 200 , 300 , 400 can receive power from the grid power G, the bypass power P, and the battery power B.

[0282] The battery power supply B stores the DC power supply, 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 until the power supply is switched and restored.

[0283] After the power supply is interrupted, the battery power source B may uninterruptedly supply the stored power to the plurality of power strips 100, 200, 300, 400 until the power supply is switched and restored.

[0284] In addition, the plurality of power supply sources 10 may further include an emergency power supply A, which supplies emergency generated power to the load 20 when power supply of the first AC power supply G, the second AC power supply P, and the battery power supply B is interrupted.

[0285] 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 .

[0286] The emergency power supply A may be a power supply that maintains the driving of the load 20 for a specified period of time by supplying emergency power to each of the loads 20 when an abnormality occurs in 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 and become unable to supply power.

[0287] For example, the emergency power source A may be a power source including an emergency generator.

[0288] Preferably, Figure 4As shown, each of the multiple power strips 100, 200, 300, 400 can receive power from three power sources 10, namely, the grid power supply G, the bypass power supply P and the battery power supply B, and only receive power from the emergency power supply A when the grid power supply G, the bypass power supply P and the battery power supply B are unable to supply power.

[0289] Here, as for each of the plurality of power supply sources 10 that supply power to each of the plurality of power strips 100, 200, 300, 400, power can be supplied from a power grid, or from separate distribution boards through separate distribution boards.

[0290] like Figures 1 to 3 As shown, each of the plurality of power boards 100, 200, 300, 400 may include: a plurality of first power conversion devices 110, 210, 310, 410, which convert the power received from the plurality of power supply sources 10 into the DC power; one or more second power conversion devices 120, 220, 320, 420, which convert the DC power received from the plurality of first power conversion devices 110, 210, 310, 410 into the driving power and supply it to the load 20; the first circuit breakers 130a, 230a, 330a, 430a and the second circuit breakers 130b, 230b, 330b, 430b; and the control units 140, 240, 340, 440.

[0291] Each of the plurality of power boards 100, 200, 300, 400 can receive power from each of the plurality of power supply sources 10, and convert the received power into the DC power through the plurality of first power conversion devices 110, 210, 310, 410, and convert the DC power into the driving power through the second power conversion devices 120, 220, 320, 420 and supply it to the load 20.

[0292] The plurality of power boards 100 , 200 , 300 , 400 may supply the DC power to the second power conversion devices 120 , 220 , 320 , 420 using any one of the plurality of first power conversion devices 110 , 210 , 310 , 410 according to the state of the plurality of power supply sources 10 .

[0293] In the event that the power supply of the conversion device 110, 210, 310, 410 that supplies the DC power to the second power conversion device 120, 220, 320, 420 is interrupted, the multiple power boards 100, 200, 300, 400 can supply the DC power to the second power conversion device 120, 220, 320, 420 through other conversion devices except the conversion device 110, 210, 310, 410.

[0294] In this case, during the period when the conversion device is switched to the other conversion device, the multiple first power conversion devices 110, 210, 310, 410 can supply the DC power to the second power conversion devices 120, 220, 320, 420 through the conversion devices 110#2, 210#2, 310#2, 410#2 that receive power from the battery power source B.

[0295] Preferably, each of the plurality of power boards 100 , 200 , 300 , 400 may include three conversion devices connected to each of the plurality of power sources 10 .

[0296] Each of the plurality of first power conversion devices 110, 210, 310, 410 included in each of the plurality of power boards 100, 200, 300, 400 can distinguish between the first power end and the second power end and output the DC power respectively.

[0297] The first power supply end may be an output of any one of the plurality of first power conversion devices 110 , 210 , 310 , 410 .

[0298] Therefore, the first power supply terminal may be a circuit connected to the output of the conversion device of the plurality of first power conversion devices 110 , 210 , 310 , 410 , and allowing the DC power output from the conversion device to flow.

[0299] The first power supply terminal is connected to the second power supply terminal and the bus 1 , so that the DC power output from the conversion device can be transmitted to the second power supply terminal and the bus 1 .

[0300] The conversion device is one of the plurality of first power conversion devices 110, 210, 310, 410. For example, the conversion device may be the third conversion device 110#3, 210#3, 310#3, 410#3 that receives power from the second AC power source 10#2.

[0301] like Figure 2 and Figure 3As shown, preferably, the conversion device can be the third conversion device 110#3, 210#3, 310#3, 410#3 that receives power from the bypass power supply P serving as the second AC power supply 10#2.

[0302] That is, the conversion device may be the third conversion device 110#3, 210#3, 310#3, 410#3, and the first power supply end may be the output end of the third conversion device 110#3, 210#3, 310#3, 410#3.

[0303] The second power terminal may be an output of the remaining conversion devices among the plurality of first power conversion devices 110 , 210 , 310 , 410 .

[0304] Therefore, the second power supply terminal may be a circuit connected to the output of the remaining conversion devices among the plurality of first power conversion devices 110 , 210 , 310 , 410 , and allowing the DC power output from the remaining conversion devices to flow.

[0305] The second power supply terminal can be connected to the first power supply terminal and the one or more second power conversion devices 120, 220, 320, 420, so that the DC power output from the remaining conversion devices can be transmitted to the first power supply terminal and the one or more second power conversion devices 120, 220, 320, 420.

[0306] The remaining conversion devices are the remaining conversion devices among the multiple first power conversion devices 110, 210, 310, 410 except the conversion device. For example, the remaining conversion devices may be the first conversion devices 110#1, 210#1, 310#1, 410#1 and the second conversion devices 110#2, 210#2, 310#2, 410#2 that receive power from the first AC power source 10#1 and the battery 10#2.

[0307] Preferably, Figure 2 and Figure 3 As shown, the remaining conversion devices may be the first conversion devices 110#1, 210#1, 310#1, 410#1 and the second conversion devices 110#2, 210#2, 310#2, 410#2 that receive power from the grid power supply G as the first AC power supply 10#1 and the battery power supply B as the battery 10#2, in addition to the third conversion devices 110#3, 210#3, 310#3, 410#3 that receive power from the bypass power supply P as the second AC power supply 10#2.

[0308] That is, the remaining conversion devices may be the first conversion devices 110#1, 210#1, 310#1, 410#1 and the second conversion devices 110#2, 210#2, 310#2, 410#2, and the second power supply terminal may be the output terminal to which the outputs of the first conversion devices 110#1, 210#1, 310#1, 410#1 and the second conversion devices 110#2, 210#2, 310#2, 410#2 are commonly connected.

[0309] In this way, the first power supply end and the second power supply end outputting the DC power supply from the plurality of first power conversion devices 110 , 210 , 310 , 410 can transmit the DC power supply to the bus 1 and each of the second power conversion devices 120 , 220 , 320 , 420 .

[0310] That is, the first power supply terminal can be connected to the second power supply terminal and the bus 1 and transmit the DC power to the second power supply terminal and the bus 1, and the second power supply terminal can transmit the DC power to the first power supply terminal and the second power conversion device 120.

[0311] At this time, the first power supply end can pass the DC power output from the third conversion device 110#3, 210#3, 310#3, 410#3 or received from the bus 1 to the second power supply end, and the second power supply end can pass the DC power received from the first power supply end to each of the second power conversion devices 120, 220, 320, 420.

[0312] The DC power converted by each of the plurality of first power conversion devices 110, 210, 310, 410 can be transmitted to each of the second power conversion devices 120, 220, 320, 420 through the first power end or the second power end of each of the plurality of first power conversion devices 110, 210, 310, 410.

[0313] Preferably, Figure 4 As shown, each of the plurality of power boards 100 , 200 , 300 , 400 may include three second power conversion devices 120 , 220 , 320 , 420 , and the driving power is supplied to the three loads 20 respectively through the three second power conversion devices 120 , 220 , 320 , 420 .

[0314] Here, the plurality of loads 20 may be electric motors M loads.

[0315] Preferably, Figure 4As shown, each of the plurality of power boards 100, 200, 300, 400 may respectively include the first circuit breakers 130a, 230a, 330a, 430a, and the first circuit breakers 130a, 230a, 330a, 430a are respectively arranged on each circuit connecting the first power supply end of each of the plurality of first power conversion devices 110, 210, 310, 410 and the bus 1 to limit the connection of the bus 1.

[0316] Therefore, each of the first power terminals of each of the plurality of power boards 100 , 200 , 300 , 400 may be commonly connected to the bus bar 1 .

[0317] Preferably, Figure 4 As shown, each of the plurality of power boards 100, 200, 300, 400 may respectively include a second circuit breaker 130b, 230b, 330b, 430b, and the second circuit breakers 130b, 230b, 330b, 430b are respectively arranged on each circuit connecting the second power supply end and the first power supply end of each of the plurality of first power conversion devices 110, 210, 310, 410, to limit the connection of the bus 1.

[0318] Therefore, each of the second power terminals of the plurality of power boards 100 , 200 , 300 , 400 may be commonly connected to the bus bar 1 through the first power terminal.

[0319] Each of the first and second circuit breakers 130 , 230 , 330 , and 430 is a DC circuit breaker for disconnecting a DC power source, and may be provided on a circuit between the first power source terminal, the second power source terminal, and the bus 1 .

[0320] In the first circuit breakers and the second circuit breakers 130, 230, 330, 430, the first circuit breakers 130a, 230a, 330a, 430a can be arranged between the first power supply end which is the output end of any one of the plurality of first power conversion devices 110, 210, 310, 410 and the bus 1 connected to the first power supply end.

[0321] Here, the one converter may be the third conversion device 110#3, 210#3, 310#3, 410#3, and the first power supply end may be an output end connected to the output of the third conversion device 110#3, 210#, 310#3, 410#.

[0322] That is, the first circuit breakers 130a, 230a, 330a, 430a can be arranged between the first power terminals of each of the plurality of power boards 100, 200, 300, 400 and the bus 1 to limit the connection between each of the plurality of power boards 100, 200, 300, 400 and the bus 1.

[0323] Accordingly, the plurality of power boards 100, 200, 300, 400 can be connected to the busbar 1 via the first power terminal, and the connection to the busbar 1 can be limited by opening and closing the first circuit breakers 130a, 230a, 330a, 430a.

[0324] The first circuit breaker 130a can limit the connection between the first power terminal and the bus 1 by opening the circuit in normal times and closing the circuit when operating.

[0325] That is, the first circuit breaker 130a can disconnect the first power supply terminal and the bus bar 1 in normal times, and connect the first power supply terminal and the bus bar 1 when in operation.

[0326] Therefore, the first power supply terminal and the bus bar 1 can be open-circuited to disconnect when the first circuit breaker 130a is not actuated, and can be closed-circuited to form a connection when the first circuit breaker 130a is actuated.

[0327] In the first circuit breakers and second circuit breakers 130, 230, 330, and 430, the second circuit breakers 130b, 230b, 330b, and 430b can be arranged between the second power supply terminal which is the output terminal of the remaining conversion devices among the plurality of first power conversion devices 110, 210, 310, and 410 and the first power supply terminal connected to the second power supply terminal.

[0328] Here, the remaining conversion devices may be the first conversion devices 110#1, 210#1, 310#1, 410#1 and the second conversion devices 110#2, 210#2, 310#2, 410#2, and the second power supply terminal may be the output terminal to which the outputs of the first conversion devices 110#1, 210#1, 310#1, 410#1 and the second conversion devices 110#2, 210#2, 310#2, 410#2 are commonly connected.

[0329] That is, the second circuit breakers 130b, 230b, 330b, 430b may be disposed between the first power terminals and the second power terminals of each of the plurality of power boards 100, 200, 300, 400 to limit the connection between the first power terminals and the second power terminals.

[0330] According to this, the plurality of power strips 100, 200, 300, 400 can be connected to the busbar 1 via the second power supply terminal, and their connection with the busbar 1 can be limited by opening and closing the second circuit breakers 130b, 230b, 330b, 430b.

[0331] The second circuit breaker 130b may limit the connection between the first power terminal and the second power terminal by closing the circuit in normal times and opening the circuit when operating.

[0332] That is, the second circuit breaker 130b can connect the first power terminal and the second power terminal in normal times, and disconnect the first power terminal and the second power terminal when in operation.

[0333] Therefore, the first power supply end and the second power supply end can be closed to form a connection when the second circuit breaker 130b is not actuated, and can be opened to disconnect when the second circuit breaker 130b is actuated.

[0334] In this way, each of the plurality of power boards 100 , 200 , 300 , 400 can be connected to the bus bar 1 by opening and closing each of the plurality of circuit breakers 130 , 230 , 330 , 430 .

[0335] The bus bar 1 is a DC bus bar through which DC power flows. The DC power transmitted to the first power terminals of the plurality of power boards 100 , 200 , 300 , 400 can flow in the bus bar 1 .

[0336] That is, the DC power may flow through the bus 1 according to the opening and closing of each of the first circuit breakers 130a, 230a, 330a, and 430a.

[0337] The plurality of first circuit breakers 130a, 230a, 330a, 430a may form a closed circuit when the DC power source is connected between the first power source terminal and the bus 1, and may form an open circuit when the first power source terminal and the bus 1 are disconnected.

[0338] The plurality of second circuit breakers 130b, 230b, 330b, 430b may form a closed circuit when the DC power source is connected between the first power source terminal and the second power source terminal, and may form an open circuit when the first power source terminal and the second power source terminal are disconnected.

[0339] In the event of a power outage at any one or more of the plurality of power strips 100, 200, 300, 400, the plurality of first circuit breakers, second circuit breakers 130, 230, 330, 430 can connect the power strip with power interruption and the adjacent power strip to the bus 1 by closing the first circuit breaker, second circuit breaker 130, 230, 330, 430 of the power strip with power interruption and the first circuit breaker 130a, 230a, 330a, 430a of the power strip adjacent to the power strip with power interruption, thereby supplying the DC power from the adjacent power strip to the power strip with power interruption.

[0340] In this case, after the power supply is interrupted, the power board with the interrupted power supply can receive the DC power from the conversion devices 110#2, 210#2, 310#2, 410#2 connected to the battery power supply B until the DC power is supplied from the adjacent power board.

[0341] Here, the adjacent power board may be a power board adjacent to the power board with power interruption and in which the conversion device 110#3, 210#3, 310#3, 410#3 outputting the DC power to the first power end is not in operation.

[0342] Therefore, the adjacent power board can utilize the third conversion device 110#3, 210#3, 310#3, 410#3 which is equivalent to the first power terminal and receives power from the second AC power supply 10#3 and converts it into the DC power supply to supply the DC power to the power board with power supply interruption.

[0343] Each of the plurality of power boards 100 , 200 , 300 , 400 may monitor operations of the plurality of first power conversion devices 110 , 210 , 310 , 410 and the one or more second power conversion devices 120 , 220 , 320 , 420 included therein.

[0344] Each of the plurality of power boards 100, 200, 300, 400 can control the opening and closing of each of the plurality of circuit breakers 130, 230, 330, 430 based on the results of monitoring the actions of the plurality of first power conversion devices 110, 210, 310, 410 and the one or more second power conversion devices 120, 220, 320, 420 included therein.

[0345] Each of the plurality of power boards 100, 200, 300, 400 can monitor the operation of the plurality of first power conversion devices 110, 210, 310, 410 and the one or more second power conversion devices 120, 220, 320, 420 included therein, and detect the status of the DC power supply and the driving power supply.

[0346] Each of the plurality of power boards 100 , 200 , 300 , 400 may receive power from any one of the plurality of power supply sources 10 and convert the power into the DC power.

[0347] That is, each of the plurality of power strips 100 , 200 , 300 , 400 can selectively receive power from any one of the plurality of power supply sources 10 .

[0348] Each of the plurality of power boards 100 , 200 , 300 , 400 may receive power from any one of the plurality of power supply sources 10 and convert the power into the DC power according to a preset supply reference.

[0349] The supply reference may be a reference for a preferred order of power supply from the plurality of power supply sources 10 .

[0350] The plurality of power boards 100, 200, 300, 400 can select any one of the plurality of first power conversion devices 110, 210, 310, 410 according to the status of the plurality of power supply sources 10, and use the selected conversion device to transmit the DC power to the one or more second power conversion devices 120, 220, 320, 420.

[0351] That is, each of the plurality of power boards 100 , 200 , 300 , 400 can transmit the DC power to the one or more second power conversion devices 120 , 220 , 320 , 420 using a conversion device selected according to the state of the plurality of power supply sources 10 .

[0352] When an abnormality occurs in any one or more of the conversion device that is transmitting the DC power to the one or more second power conversion devices 120, 220, 320, 420 and the power supply corresponding to the conversion device, the multiple power boards 100, 200, 300, 400 can transmit the DC power to the one or more second power conversion devices 120, 220, 320, 420 through other conversion devices other than the conversion device.

[0353] That is, when an abnormality occurs in any one or more of the conversion device that is transmitting the DC power and the power supply corresponding to the conversion device, each of the multiple power boards 100, 200, 300, 400 can switch to other converters other than the conversion device, and use the switched conversion device to transmit the DC power to the one or more second power conversion devices 120, 220, 320, 420.

[0354] When an abnormality occurs in any one or more of the conversion device that is transmitting the DC power to the one or more second power conversion devices 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 one or more second power conversion devices 120, 220, 320, 420.

[0355] The system 1000 as described above may further include a control device 600, which monitors the status of the plurality of power strips 100, 200, 300, 400 and at least one of the plurality of first circuit breakers, the plurality of second circuit breakers 130, 230, 330, 430, and controls the plurality of power strips 100, 200, 300, 400 and at least one of the plurality of first circuit breakers, the plurality of second circuit breakers 130, 230, 330, 430 according to the monitoring results.

[0356] As described above, the plurality of power boards 100 , 200 , 300 , 400 that convert and supply the DC power may be controlled by the control device 600 .

[0357] Each of the plurality of power strips 100 , 200 , 300 , 400 may communicate with the control device 600 and operate according to the communication result with the control device 600 .

[0358] For example, each of the plurality of power strips 100 , 200 , 300 , 400 may receive a control instruction from the control device 600 , and perform an action according to the control instruction, or transmit status information to the control device 600 .

[0359] Each of the plurality of power boards 100 , 200 , 300 , 400 may transmit the result of monitoring the operation of the plurality of 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 .

[0360] The control device 600 can 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 .

[0361] For example, the control device 600 can control the conversion and supply of the DC power supply and the conversion and supply of the driving power supply of each of the multiple power boards 100, 200, 300, 400 based on the status information of the DC power supply and the driving power supply received from each of the multiple power boards 100, 200, 300, 400.

[0362] The control device 600 can communicate with each of the multiple power boards 100, 200, 300, 400 and control the conversion and supply of the driving power of each of the multiple power boards 100, 200, 300, 400, or the first circuit breaker and the second circuit breaker 130, 230, 330, 430 respectively included in the multiple power boards 100, 200, 300, 400 according to the status information received from each of the multiple power boards 100, 200, 300, 400.

[0363] In addition, the control device 600 can also detect the states of the multiple power supply sources 10 and the multiple loads 20 or receive information about the states of the multiple power supply sources 10 and the multiple loads 20 from an external communication unit, and control the conversion and supply of the driving power of each of the multiple power supply boards 100, 200, 300, 400 or the first circuit breakers, second circuit breakers 130, 230, 330, 430 respectively included in the multiple power supply boards 100, 200, 300, 400 according to the states of the multiple power supply sources 10 and the multiple loads 20.

[0364] In this case, the control device 600 can transmit control instructions for the conversion and supply of the driving power of each of the multiple power boards 100, 200, 300, 400 or the control of the first circuit breaker, the second circuit breaker 130, 230, 330, 430 respectively included in the multiple power boards 100, 200, 300, 400, and implement control according to the control instructions through the control units 140, 240, 340, 440 included in each of the multiple power boards 100, 200, 300, 400.

[0365] For example, when an abnormality occurs in the entire grid power supply G that is supplying power to the multiple power boards 100, 200, 300, 400, it can be controlled as follows: by transmitting a control instruction to open the first circuit breaker, the second circuit breaker 130, 230, 330, 430, receive power from a power source other than the grid power supply G, and convert and supply the DC power supply to the control units 140, 240, 340, 440 included in each of the multiple power boards 100, 200, 300, 400, so that the first circuit breaker 130a, 230a, 330a, 430a is opened, the second circuit breaker 130b, 230b, 330b, 430b is closed, power is received from the bypass power supply P or the battery power supply B, and the DC power is converted and supplied, so as to block the power supply from the grid power supply G and switch to other power supply sources.

[0366] When an abnormality occurs in any one or more of the multiple power boards 100, 200, 300, 400, the control device 600 can be controlled to close the first circuit breaker, the second circuit breaker 130, 230, 330, 430 of the power board where the abnormality occurs, and the first circuit breaker 130a, 230a, 330a, 430a of the power board most adjacent to the power board, thereby enabling the power board where the abnormality occurs to receive the DC power from the adjacent power board through the bus 1.

[0367] For example, when a failure occurs in the conversion device 110 of the first power board 100 among the plurality of power boards 100, 200, 300, 400, control can be transmitted to the first power board 100 and the second power board 200 respectively so that the first circuit breaker 130a, the second circuit breaker 130b of the first power board 100 and the first circuit breaker 230a of the second power board 200 are closed, and the second circuit breaker 230b of the second power board 200 is opened, so as to disconnect the plurality of first power conversion devices 110 of the first power board 100, and supply power to any one of the plurality of first power conversion devices 210 of the second power board 200 through the bus 1. The control instructions of the DC power supply are thereby controlled to close the first circuit breaker 130a, the second circuit breaker 130b and the first circuit breaker 230a of the first power board 100, and open the second circuit breaker 230b of the second power board 200, so that any one of the multiple first power conversion devices 210 of the second power board 200 supplies the DC power to the one or more second power conversion devices 120 of the first power board 100 through the bus 1, so as to supply the DC power converted by any one conversion device 210 of the second power board 200 most adjacent to the first power board 100 to the one or more second power conversion devices 120 of the first power board 100 through the bus 1.

[0368] In this way, when an abnormality occurs in any one or more of the multiple power boards 100, 200, 300, 400, it can be controlled to receive the DC power from the adjacent power board through the bus 1, so that each of the multiple power boards 100, 200, 300, 400 can perform UPS function between the multiple power boards 100, 200, 300, 400.

[0369] Therefore, even when unexpected abnormalities occur in the multiple power supply sources 10, the multiple power boards 100, 200, 300, 400 and the multiple loads 20, the power supply system 1000 can continue to maintain the supply of the driving power to the multiple loads 20, thereby maintaining the operation of the multiple loads 20 without interruption, and can implement active power supply countermeasures suitable for the abnormalities that have occurred, and can stably operate the multiple loads 20 and control the power supply system 1000 regardless of the type and degree of the abnormality.

[0370] The operation example of the power supply system 1000 described above can be performed as follows: Figures 5 to 8 Implementation shown.

[0371] like Figures 5 to 8 The operation example shown is an operation example when the power supply system 1000 includes five power boards 100, 200, 300, 400, 500. The power supply system 1000 may also include less than five or more than five of the plurality of power boards 100, 200, 300, 400, 500.

[0372] like Figures 5 to 8 As shown, the preferred embodiment of the power supply system 1000 may include five power boards 100, 200, 300, 400, 500. Figures 5 to 8 As shown, the case where the plurality of power boards 100 , 200 , 300 , 400 , 500 are five is taken as an example for description.

[0373] Figure 5 This is a situation where each of the plurality of power boards 100, 200, 300, 400, 500 receives power from the grid power supply G in the plurality of power supply sources 10. In this case, the power supply from the bypass power supply P and the battery power supply B will be disconnected, and the power can be received through the grid power supply G and converted in the order of the DC power supply and the drive power supply, and supplied to each of the plurality of loads 20.

[0374] like Figure 5 The operation example shown is a general operation case of receiving power from the grid power source G and operating. The general operation of the power supply system 1000 can be performed as shown in the figure.

[0375] Figure 6 The situation where each of the plurality of power boards 100, 200, 300, 400, 500 receives power from the bypass power supply P in the plurality of power supply sources 10 may be a situation where an abnormality occurs in the grid power supply G. In this case, the power supply from the grid power supply G and the battery power supply B is disconnected, and power can be received through the bypass power supply P and converted in the order of the DC power supply and the drive power supply, and supplied to each of the plurality of loads 20.

[0376] like Figure 6 The operation example shown is a special operation case where the power is received from the bypass power source P and operates. The special operation of the power supply system 1000 can be performed as shown in the figure.

[0377] Figure 7The situation in which each of the plurality of power boards 100, 200, 300, 400, 500 receives power from the battery power supply B in the plurality of power supply sources 10 may be a situation in which an abnormality occurs in the grid power supply G and the bypass power supply P. In this case, the power supply from the grid power supply G and the bypass power supply P is disconnected, and power can be received by the battery power supply B and converted in the order of the DC power supply and the drive power supply, and supplied to each of the plurality of loads 20.

[0378] like Figure 7 The operation example shown is a case of power-off operation in which the power supply system 1000 receives power from the battery power source B and operates. The power-off operation of the power supply system 1000 can be performed as shown in the figure.

[0379] Figure 8 The situation where each of the plurality of power boards 100, 200, 300, 400, 500 receives power from the emergency power supply A in the plurality of power supply sources 10 may be a situation where an abnormality occurs in the grid power supply G, the bypass power supply P and the battery power supply B. In this case, the power supply from the grid power supply G, the bypass power supply P and the battery power supply B is disconnected, and the emergency power supply A can directly supply the driving power to each of the plurality of loads 20.

[0380] like Figure 8 The operation example shown is a case of emergency operation in which the power is received from the emergency power supply A and operated. The emergency operation of the power supply system 1000 can be performed as shown in the figure.

[0381] As described above, each of the multiple power boards 100, 200, 300, 400, 500 of the power supply system 1000 can receive power and operate from the same power supply source, or each of the multiple power boards 100, 200, 300, 400, 500 can also selectively receive power and operate from any one of the multiple power supply sources 10.

[0382] For example, the first power board 100 and the second power board 200 can receive power from the grid power supply G and operate, the third power board 300 and the fourth power board 400 can receive power from the bypass power supply P and operate, and the fifth power board 500 can receive power from the battery power supply B and operate.

[0383] In addition, each of the plurality of power strips 100 , 200 , 300 , 400 , 500 may also receive power from at least one power supply source 10 and operate.

[0384] For example, in the case where the DC power is supplied from the second power board 200 to the first power board 100 due to an abnormality in the first power board 100, the second power board 200 can convert the power received from the grid power supply G into the DC power supply through the second-1 conversion device 210#1 and transmit it to the one or more second power conversion devices 220, and also receive power from the bypass power supply P and convert it into the DC power supply through the second-3 conversion device 210#3, and then transmit the DC power converted by the second-3 conversion device 210#3 to the one or more second power conversion devices 120 of the first power board 100 through the bus 1.

[0385] In the example described above, the first power strip 100 and the second power strip 200 can be connected to the bus 1 by closing the first circuit breaker 130a, the second circuit breaker 130b, and the first circuit breaker 230a of the second power strip 200 of the first power strip 100, and the supply of the DC power from the second power strip 200 to the first power strip 100 can be achieved through the bus 1.

[0386] In this way, each of the multiple power boards 100, 200, 300, 400, 500 can receive power from more than one power supply source 10 and operate to realize power supply between the multiple power boards 100, 200, 300, 400, 500, that is, the execution of UPS functions between the multiple power boards 100, 200, 300, 400, 500.

[0387] The embodiments of the power supply device and power supply system of the present invention as described above can be applied to power supply devices, power supply systems, and power supply system operation methods that supply / use DC power. In particular, they can be effectively applied to DCUPS modules and power supply systems equipped with the DCUPS modules, and can also be applied to motor control groups, motor control systems, motor operation systems, etc. that control multiple motor loads.

[0388] The above describes the specific embodiments of the present invention, but various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims and their equivalents.

[0389] Although the present invention is described above through limited embodiments and drawings, the present invention is not limited to the above embodiments, and a person skilled in the art can make various modifications and variations from such descriptions. Therefore, the concept of the present invention should be interpreted only by the claims, and variations that are equal or equivalent to them should all fall within the scope of the concept of the present invention.

[0390] Description of Reference Numerals

[0391] 10: Power supply 20: Load

[0392] 100, 200, 300, 400: power supply (power board)

[0393] 110, 210, 310, 410: first power conversion device (converter)

[0394] 120, 220, 320, 420: second power conversion device (inverter)

[0395] 130, 230, 330, 430: Circuit breaker

[0396] 140, 240, 340, 440: Control unit

[0397] 600: Control device 1000: Power supply system

Claims

1. A power supply device, characterized in that: include: A plurality of first power conversion devices convert power received from each of a plurality of power supply sources into DC power; One or more second power conversion devices convert the DC power into driving power and supply it to a load; A first circuit breaker is arranged between a first power supply terminal and a bus bar, wherein the first power supply terminal is connected to an output terminal of any one of the plurality of first power conversion devices to input / output the DC power supply, and the bus bar is connected to the first power supply terminal to allow the DC power supply to pass through; as well as A second circuit breaker is provided between the first power supply terminal and the second power supply terminal, the second power supply terminal is connected to the output terminal of the remaining first power conversion devices among the plurality of first power conversion devices and the input terminal of the second power conversion device, and the second circuit breaker connects or disconnects the first power supply terminal and the second power supply terminal; The first circuit breaker changes opening and closing according to the state of at least one of the DC power supply, the driving power supply, the plurality of first power conversion devices, and the load, thereby connecting or limiting the DC power supply between the first power supply terminal and the bus. The second circuit breaker changes opening and closing according to the state of at least one of the DC power supply, the driving power supply, the plurality of first power conversion devices, and the load, thereby connecting or limiting the DC power supply between the first power supply terminal and the second power supply terminal. The first circuit breaker is closed when the DC power source is connected between the first power source terminal and the bus bar, and is open when the first power source terminal and the bus bar are disconnected. The second circuit breaker becomes a closed circuit when the DC power source is connected between the first power source terminal and the second power source terminal, and becomes an open circuit when the first power source terminal and the second power source terminal are disconnected.

2. The power supply device according to claim 1, characterized in that: The plurality of power sources include a first alternating current power source and a second alternating current power source that supply AC power.

3. The power supply device according to claim 2, characterized in that: The plurality of power sources also include batteries storing DC power. When the supply of the DC power source to the second power conversion device is interrupted, the power stored in the battery is supplied to the first power conversion device while the supply of the DC power source is resumed.

4. The power supply device according to claim 3, characterized in that: The interruption of the supply of the DC power supply is at least one of an interruption of the supply of the first AC power supply and the second AC power supply and an interruption of the operation of the plurality of first power conversion devices receiving power from the first AC power supply and the second AC power supply.

5. The power supply device according to claim 3, characterized in that: After the supply of the DC power source is interrupted, the battery uninterruptedly supplies the stored power to the plurality of first power conversion devices until the supply of the DC power source is switched and restored.

6. The power supply device according to claim 3, characterized in that: The plurality of first power conversion devices include a first conversion device, a second conversion device and a third conversion device, The first conversion device, the second conversion device and the third conversion device are respectively connected to the first AC power source, the battery and the second AC power source, and receive power from the power supply sources connected thereto.

7. The power supply device according to claim 6, characterized in that: The plurality of first power conversion devices supply the DC power to the second power conversion device by operating any one of the first conversion device, the second conversion device, and the third conversion device.

8. The power supply device according to claim 7, characterized in that: In the event that power is interrupted for the conversion device that supplies the DC power to the second power conversion device, the plurality of first power conversion devices supply the DC power to the second power conversion device through the first conversion device, the second conversion device, and other conversion devices among the third conversion device except the conversion device to which power is interrupted.

9. The power supply device according to claim 8, characterized in that: The case where the power supply of the power supply interrupted conversion device is interrupted is a case where an abnormal state is detected in any one or more of the power supply interrupted conversion device, the power supply source connected to the power supply interrupted conversion device, and the rated value of the DC power supply.

10. The power supply device according to claim 8, characterized in that: While the conversion device whose power supply is interrupted is switched to the other conversion device, the plurality of first power conversion devices supply the DC power to the second power conversion device via the second conversion device.

11. The power supply device according to claim 3, characterized in that: The at least one state is at least one of a situation where the DC power supply changes from an initial state, a situation where the driving power supply changes from an initial state, a situation where the operation states of the plurality of first power conversion devices change, and a situation where the driving state of the load changes.

12. The power supply device according to claim 3, characterized in that: In the event that the power supply of the conversion device connected to the first AC power source and the second AC power source is interrupted, The first circuit breaker is closed to connect the first power supply terminal to the bus bar, so that the DC power supply is conducted from the bus bar to the first power supply terminal. The second circuit breaker is closed to connect the first power supply terminal and the second power supply terminal, so that the DC power is conducted from the first power supply terminal to the second power supply terminal and supplied to the second power conversion device.

13. The power supply device according to claim 12, characterized in that: After the power supply of the conversion device connected to the first AC power source and the second AC power source is interrupted, the DC power is supplied to the second power conversion device by the conversion device connected to the battery until the DC power conducted from the bus is supplied to the second power conversion device.

14. The power supply device according to claim 3, characterized in that: When power supply from other power supply devices connected to the bus is interrupted, the first circuit breaker is closed to connect the first power supply terminal to the bus, so that the DC power is conducted from the first power supply terminal to the bus and supplied to the other power supply devices. The second circuit breaker becomes open circuit to separate the first power terminal and the second power terminal, thereby disconnecting the first power terminal and the second power terminal.

15. A power supply system, characterized in that: include: A plurality of power boards convert power received from each of a plurality of power sources into DC power, and convert the DC power into a driving power of a load and supply the driving power to the load; A bus bar, to which first power supply terminals for inputting / outputting the DC power supply in each of the plurality of power supply boards are commonly connected, so that the DC power supply converted in the plurality of power supply boards is turned on; a plurality of first circuit breakers, disposed between each of the first power terminals and the busbar; and A plurality of second circuit breakers, arranged between each second power supply terminal and the first power supply terminal, and inputting the DC power from each of the plurality of power boards through the first power supply terminal to the second power supply terminal; The plurality of first circuit breakers change opening and closing according to the operating state of at least one of the plurality of power boards, thereby connecting or limiting the DC power supply between the first power supply terminal and the bus bar. The plurality of second circuit breakers are switched on and off according to the operating state of at least one of the plurality of power boards, thereby connecting or limiting the DC power supply between the first power supply terminal and the second power supply terminal. The first circuit breaker is closed when the DC power source is connected between the first power source terminal and the bus bar, and is open when the first power source terminal and the bus bar are disconnected. The second circuit breaker becomes a closed circuit when the DC power source is connected between the first power source terminal and the second power source terminal, and becomes an open circuit when the first power source terminal and the second power source terminal are disconnected.

16. The power supply system according to claim 15, characterized in that: The plurality of power sources include: A first alternating current power source and a second alternating current power source supplying AC power; and a battery power supply storing DC power, and supplying the stored power to the plurality of power boards while the power supply is switched and restored in the event of a power supply interruption of the first AC power supply and the second AC power supply; After the power supply is interrupted, the stored power is continuously supplied from the battery power source to the plurality of power boards until the power supply is switched and restored.

17. The power supply system according to claim 16, characterized in that: The plurality of power boards respectively include: a plurality of first power conversion devices, converting power received from the plurality of power supply sources into the DC power; and a second power conversion device, converting the DC power received from the plurality of first power conversion devices into the driving power and supplying the driving power to the load; The DC power is supplied to the second power conversion device by any one of the plurality of first power conversion devices according to the states of the plurality of power supply sources.

18. The power supply system according to claim 16, characterized in that: In the plurality of first circuit breakers and the plurality of second circuit breakers, In the event of a power outage in one or more of the plurality of power boards, the first circuit breaker, the second circuit breaker of the power board with the power interruption, and the first circuit breaker of the power board adjacent to the power board with the power interruption become closed, thereby connecting the power board with the power interruption and the adjacent power board to the busbar to supply the DC power from the adjacent power board to the power board with the power interruption.

19. The power supply system according to claim 18, characterized in that: After power supply is interrupted, until the DC power conducted from the adjacent power supply board is supplied to the power supply board to which power supply is interrupted, the power supply board to which power supply is interrupted receives the DC power from the conversion device connected to the battery power.

20. The power supply system according to claim 19, characterized in that: The adjacent power board is a power board adjacent to the power board with power supply interruption and having a non-actuated conversion device for outputting the DC power to the first power supply end.

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