TWI633740B - Power supply backup system and method of controlling the same - Google Patents

Abstract

A power backup system includes: a switch module comprising a plurality of switch units, each switch unit switching a power source to be an input power source; a power supply module comprising a plurality of power supply units, each power supply unit Correspondingly connecting the switch units, and converting the input power source to an output power source and supplying power to a load; a control unit controlling the switch units to switch one of the input sources of the power source to the input power source; wherein, when When one of the switch units or the power supply unit fails, the power supplies of the remaining power supply units connected to the remaining switch units are greater than or equal to the power required by the load; when one of the input sources is abnormal The control unit controls the switching units to switch to another input source.

Description

Power backup system and its operation method

The present invention relates to a power backup system and an operation method thereof, and more particularly to a high reliability centralized power backup system and an operation method thereof.

With the rapid development of technology, the demand for data processing centers has increased. The data processing center is equipped with computers. It uses computers and related equipment to process large amounts of information, providing convenient, reliable and fast services to assist enterprises in various departments to increase Productivity or administrative efficiency is often referred to as the Computing Center or Computer Center. The data processing center is a service function. Within an organization, the services provided by the data processing center have an impact on the efficiency and achievements of other units. Most of the data is processed from the remote terminal to the computer host of the data processing center. Due to actual needs, the data processing center often needs to operate 24 hours. The power of the data processing center must be specially designed to maintain the stability of the data processing center. Therefore, most data processing centers use a power backup system at the front end. When there is a problem with the input power, the power backup system can be switched to the backup power supply to continue to provide the power required by the data processing center.

Please refer to FIG. 1 for a circuit block diagram of an existing power backup system. The power backup system 100A converts a power source Vs into an output power source Vo and supplies it to the load 40A (data processing center) of the back end. The power backup system 100A includes a switch module 10A (having a high power capacity module) and a plurality of power supplies (P1-1~P1-M) connected to the switch module 10A, wherein the switch module The 10A is an automatic transfer switch (ATS). Since the current power backup system 100A supplies the power supply Vs to the rack or shelf power converter (P1-1~P1-M) with only a single automatic transfer switch, when the automatic transfer switch fails, it is caused. The power supply (P1-1~P1-M) of the entire rack is invalid, which affects the data processing center of the back end. Due to the lack of the circuit architecture of the current power backup system 100A, the reliability of the overall power backup system 100A is poor.

Therefore, how to design a power backup system and its operation method to maintain the stability of the data processing center is a major issue that the creators of this case want to overcome and solve.

In order to solve the above problems, the present invention provides a power backup system to overcome the problems of the prior art. Therefore, the power backup system of the present invention comprises: a switch module comprising a plurality of switch units, each switch unit switching a power source to an input power source. A power supply module includes a plurality of power supply units, each of which is connected to the switch units, and converts the input power to an output power supply and supplies power to a load. Wherein, when one of the switch units or the power supply unit fails, the power supplies of the remaining power supply units connected to the remaining switch units are greater than or equal to the power required by the load.

In an embodiment, the power source includes a plurality of input sources, and the switch units switch one of the input sources of the power source to the input power source.

In the first embodiment, the power backup system further includes: a control unit that connects the switch units. Wherein, when one of the input sources is abnormal, the control unit controls the switching units to switch to another input source.

In the first embodiment, the input sources include a first input source and a second input source, and the switch units include: a first switch, the first input source is received at one end, and the other end is connected to the other end. A power supply unit. A second switch receives the second input source at one end and the other end of the first switch at the other end. If the first input source is abnormal, the control unit controls the first switch to be non-conductive, and turns on the second switch to switch the switch units to output the second input source; if the second input source is abnormal The control unit controls the second switch to be non-conductive, and turns on the first switch to switch the switch units to output the first input source.

In the first embodiment, the first switch is not turned on between the second switch, or the second switch is not turned on between the first switch, and has a switching time.

In the first embodiment, wherein the switching time is within 10 milliseconds.

In the second embodiment, the power backup system further includes: a plurality of control units, and the control units are correspondingly connected to the switch units. Wherein, when one of the input sources is abnormal, some of the control units control the switching of the switching units to another input source.

In the second embodiment, the input sources include a first input source and a second input source, and the switch units include: a first switch, the first input source is received at one end, and the other end is connected to the other end. A power supply unit. A second switch receives the second input source at one end and the other end of the first switch at the other end. If the first input source is abnormal, the control units control the first switch to be non-conductive, and turn on the second switch to switch the switch units to output the second input source; If the second input source is abnormal, the control units control the second switch to be non-conductive, and turn on the first switch to switch the switch units to output the first input source.

In the second embodiment, the first switch is not turned on between the second switch, or the second switch is not turned on between the first switch, and has a switching time.

In the second embodiment, the switching time is within 10 milliseconds.

In an embodiment, the switch units are automatic transfer switches.

In the first embodiment, the power backup system further includes a first chassis, and the switch module and the power supply module are disposed in the first chassis.

In an embodiment, the first accommodating space further includes a plurality of first accommodating spaces and a plurality of second accommodating spaces, and the first accommodating spaces and the second accommodating spaces are staggered and juxtaposed. Housing structure.

In the first embodiment, the first accommodating space or the second accommodating spaces respectively accommodate the switch units and the power supply units, and the switch units and the power supply units are The first accommodating space and the second accommodating spaces are arbitrarily exchanged.

In the second embodiment, the power backup system further includes a first chassis and a second chassis, the first chassis is configured to receive the switch module, and the second chassis is configured to receive the power The module is supplied, and the switch module is connected to the power supply module.

In one embodiment, each of the power supply units includes at least one power supply, and the input power is converted to an output power. When one of the switch units or the power supply unit fails, the at least one power supply of the corresponding connection The output power is not output.

In order to solve the above problems, the present invention provides a method of operating a power backup system to overcome the problems of the prior art. Therefore, the power backup system of the present invention includes a plurality of switch units, and a plurality of power supply units corresponding to the switch unit, and converts the plurality of input sources into an output power source and supplies power to a load, the operation method includes : (a) providing a control unit, the control unit The switch unit is controlled to switch one of the input sources to the input power. (b) When one of the switching units or the power supply unit fails, the remaining power supply units to which the remaining switching units are connected can provide power greater than or equal to the power required by the load. (c) The power supply system includes a plurality of input sources, and when one of the input sources is abnormal, the control unit controls the switching units to switch to another input source.

In an embodiment, the input sources include a first input source and a second input source, wherein if the first input source is abnormal, the control unit controls the switch units to switch the first input source to the a second input source; if the second input source is abnormal, the control unit switches the switch units to switch the second input source to the first input source.

In an embodiment, the control unit controls the switch units to switch the first input source to the second input source, or switch the second input source to be between the first input sources, and has a switching time.

In an embodiment, wherein the switching time is within 10 milliseconds.

In order to further understand the technology, the means and the effect of the present invention in order to achieve the intended purpose, refer to the following detailed description of the invention and the accompanying drawings. The detailed description is to be understood as illustrative and not restrictive.

[technical technology]

100A‧‧‧Power Backup System

10A‧‧‧Switch Module

(P1-1~P1-M)‧‧‧Power supply

40A‧‧‧load

Vs‧‧‧ power supply

Vo‧‧‧Output power supply

〔this invention〕

100, 100’‧‧‧ Power Backup System

10‧‧‧Switch Module

(Q1~Qn+1)‧‧‧Switch unit

SW1‧‧‧ first switch

SW2‧‧‧second switch

20‧‧‧Power supply module

(P1~Pn+1)‧‧‧Power supply unit

(P1-1~Pn+1-M)‧‧‧Power supply

30, (30-1~30-n+1) ‧‧‧ control unit

40‧‧‧ load

50‧‧‧First rack

50’‧‧‧Second rack

Vs‧‧‧ power supply

Vs1‧‧‧ first input source

Vs2‧‧‧ second input source

Vin‧‧‧Input power supply

Vo‧‧‧Output power supply

Sc‧‧‧ control signal

Th‧‧‧ Switching time

(S100)~(S300)‧‧‧ steps

1 is a circuit block diagram of a conventional power backup system; FIG. 2 is a circuit block diagram of a power backup system according to a first embodiment of the present invention; FIG. 3 is a power backup system according to a second embodiment of the present invention; Circuit block diagram; FIG. 4 is a schematic circuit diagram of the switch unit of the present invention; 5 is a schematic diagram of a circuit switching structure of the first embodiment of the power supply backup system of the present invention; FIG. 6B is a schematic diagram of a circuit structure of a second embodiment of the power supply backup system of the present invention; 6C is a schematic diagram of the physical architecture of the second embodiment of the power backup system of the present invention; FIG. 7 is a flowchart of the operation method of the power backup system of the present invention.

The technical content and detailed description of the present invention are as follows with reference to the following drawings: Please refer to FIG. 2, which is a circuit block diagram of a power backup system according to a first embodiment of the present invention. The power backup system 100 receives a power source Vs and supplies power to a load 40. The power backup system 100 includes a switch module 10, a power supply module 20, and a control unit 30. The switch module 10 receives the power source Vs and switches the power source to an input power source Vin. The power supply module 20 is connected between the switch module 10 and the load 40, and converts the input power source Vin into an output power source Vo, and supplies power to the load 40. The control unit 30 transmits a control signal Sc to control the opening and closing of the switch module 10 according to the power supply Vs state of the power backup system 100. The power source Vs, the input power source Vin, and the power source form of the output power source Vo may be a voltage source, a current source, or the like. However, it is not limited thereto, in other words, any form of power supply capable of providing electric power should be included in the scope of the present invention. It is worth mentioning that the power supply Vs is at least one input source. For a detailed description of the power supply Vs, please refer to the description below.

Referring to FIG. 2, the switch module 10 includes a plurality of switch units (Q1~Qn+1), each switch unit (Q1~Qn+1) receiving the power source Vs and switching the power source Vs to the input. Power supply Vin. The power supply module 20 includes a plurality of power supply units (P1~Pn+1), and each power supply unit (P1~Pn+1) is connected to each switch unit (Q1~Qn+1), and is converted. The input power source Vin is the input The power supply Vo is output and the load 40 is powered. The control unit 30 transmits a control signal Sc to control the opening and closing of the switch module 10 to switch an input source suitable for the power backup system 100.

The power backup system 100 is a backup system of n+1, wherein the symbol n+1 refers to the power required by the n power supply units to be greater than or equal to the power required by the load 40, plus one Backup power supply unit. When one of the switching units (assumed to be Qn+1) or the power supply unit (assumed to be Pn+1) fails, causing the path to fail to output power to the back-end load normally, the remaining switching units (Q1~Qn) The total power that the corresponding power supply units (P1~Pn) can provide is still greater than or equal to the power required by the load 40 to maintain the smooth operation of the load 40 and achieve the backup effect. Taking FIG. 2 as an example, when one of the switching units (assumed to be Qn+1) fails, the power supply unit Pn+1 representing the corresponding connection cannot output the output power Vo. However, since the power backup system 100 is a backup system of n+1, the remaining power supply units (P1~Pn) can also stably supply the power required by the load 40 to prevent the power backup system 100 from being provided. The load 40 requires the power to cause the load to fail. When one of the power supply units (assumed to be P2) fails, it means that the power supply unit P2 cannot output the output power supply Vo, or the power supply unit P2 cannot provide the same power as the other power supply units. However, since the power backup system 100 is a backup system of n+1, the remaining power supply units (P1, P3~Pn+1) can also stably supply the power required by the load 40 to avoid the power backup. System 100 is unable to provide the power required by the load 40 to cause the load to fail. It is worth mentioning that the power mentioned in the present invention may be voltage, current, power capacity, etc. For example, as shown in Figure 2, assuming n = 10, and the load 40 requires 1000 watts during normal operation, the maximum output power that each power supply unit can provide when designing the power supply unit should be designed to be 1000. /n=1000/10=100 watts or more, because the entire power backup system uses n+1 power supply units, that is, in addition to the original 10 power supply units, plus one power supply unit, therefore, when When one of the power supply units (assumed to be P11) or one of the switch units (assumed to be Q11) fails to provide 100 watts of output power, the remaining 1~10 The total output power of the power supply unit can still reach more than 1000 watts to meet the power demand of the load 40.

As shown in FIG. 2, each power supply unit (P1~Pn+1) includes a plurality of power supplies (P1-1~Pn+1-M), and the switch units (Q1~Qn+1) correspond to each other. Each power supply (P1-1~Pn+1-M) in the power supply units (P1~Pn+1) is connected. When one of the power supplies (assumed to be P2-2) fails, the output power supply Vo outputted by the group of power supply units P2 is abnormal. However, since the power backup system 100 is a backup system of n+1, the total power that the remaining power supply units (P1, P3~Pn+1) can provide is still greater than or equal to the power required by the load 40. In order to prevent the power backup system 100 from providing the power required by the load 40, the load cannot be operated, wherein the symbol M has 1 to M power supplies in each power supply unit.

Please refer to FIG. 3 , which is a circuit block diagram of a power backup system according to a second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the power backup system 100' includes a plurality of control units (30-1~30-n+1). Each control unit (30-1~30-n+1) is connected to each switch unit (Q1~Qn+1), and each switch unit (Q1~Qn+1) is controlled correspondingly. The control units (30-1~30-n+1) respectively transmit a control signal Sc to control corresponding switch units (Q1~Qn) in the switch module 10 according to the power supply Vs state of the power backup system 100'. +1) opening and closing. Since the power backup system 100' controls a single switching unit (Q1~Qn+1) for a single control unit (30-1~30-n+1), one of the control units (30-1~30-n) +1) When it is damaged, it will not cause all the switching units (Q1~Qn+1) to be inoperable, and the power supply units (P1~Pn+1) will not receive the power supply Vs, so that the power supply is redundant. The system 100' is unable to provide the power required by the load 40 and the load is not operational.

Please refer to FIG. 4 , which is a circuit diagram of the switch unit of the present invention. Referring to FIGS. 2~3, each switching unit (Q1~Qn+1) includes a first switch SW1 and a second switch SW2. One end of the first switch SW1 receives a first input source Vs1 of the power source Vs, one end of the second switch SW2 receives a second input source Vs2 of the power source Vs, and the other end of the first switch SW1 is Connect the second The switch SW2 is output and the input power source Vin is output. When the control unit 30 controls the first switch SW1 to be turned on, the first input source Vs1 is the input power source Vin; and when the control unit 30 controls the second switch SW2 to be turned on, the second input source Vs2 is The input power source Vin. When the power backup system 100 is in operation, the control unit 30 turns on the first switch SW1 or the second switch SW2 to output the first input source Vs1 or the second input source Vs2. The corresponding power supply unit (P1~Pn+1) converts the first input source Vs1 or the second input source Vs2 to the output power source Vo, when the first input source Vs1 or the second input source Vs2 is When an abnormality occurs, the control unit 30 controls the switching units (Q1~Qn+1) to switch to another input source. It should be noted that in the embodiment, the power source Vs is not limited to only the first input source Vs1 and the second input source Vs2, and is merely taken as an example for convenience of description. In other words, the power source Vs can include a plurality of input sources or only a single input source, and the number of internal switches of each of the switch units (Q1~Qn+1) is corresponding to the number of input sources.

Take Figure 2 as an example, and refer to Figure 4 for cooperation. It is assumed that the power supply backup system 100 uses the first input source Vs1 as the input power source Vin. When the control unit 30 detects that the first input source Vs1 is abnormal, the control unit 30 controls the first switch SW1 to be non-conductive. And turning on the second switch SW2, and switching to the second input source Vs2 as the input power source Vin. It is worth mentioning that the switch units (Q1~Qn+1) in the embodiment are automatic transfer switches (ATS), and may be semiconductor switches or mechanical switches. However, it is not limited thereto. In other words, as long as the type of the switching unit of the above-mentioned utility can reach the cost, it should be included in the scope of the present embodiment.

Please refer to FIG. 5, which is a waveform diagram of the switch switching of the present invention. Referring to FIG. 2 to FIG. 4, the power backup system 100 detects the first input source Vs1 and the second input source Vs2 before running. When the quality of one of the input sources is better, the control unit 30 is configured. Switching the switch corresponding to the better quality input source. Taking FIG. 5 as an example, the quality of the first input source Vs1 is better, and thus the first switch SW1 is turned on. And when the quality of the first input source Vs1 is lower than the threshold or the first input source Vs1, the control unit 30 does not turn on the first switch SW1 and turns on the second switch SW2 to input the input power Vin By the first loser The source Vs1 is switched to the second input source Vs2. The first switch SW1 and the second switch SW2 inside the switch units (Q1~Qn+1) have a switching time Th when the first input source Vs1 and the second input source Vs2 are switched. More specifically, the switching time Th is a delay time between when the first switch SW1 is turned off and when the second switch SW2 is turned on, or when the second switch SW2 is turned off to when the first switch SW1 is turned on. The time must be such that the power supply units (P1~Pn+1) can tolerate the time when the input power source Vin is not present temporarily. It is worth mentioning that, in order to prevent the first input source Vs1 from being lower than the threshold, the second input source Vs2 also fails to reach the threshold value while turning on the first switch SW1 and the second switch SW2. Therefore, in the present embodiment, it is preferable that the threshold is set to within 10% of the error of the input source reference value. In addition, the output power supply Vo that supplies the load to the power backup system 100 is affected to avoid the switching time Th being too long. Therefore, in the present embodiment, it is preferable that the switching time Th is set to 10 milliseconds.

6A is a schematic diagram of a circuit architecture of a first embodiment of a power backup system according to the present invention. Referring to FIGS. 2 to 4, the switch module 10 is housed in a first rack (rack or Shelf) 50, and the power supply module 20 is housed in a second rack 50'. As shown in FIG. 6A, the switch module 10 and the power supply module 20 are respectively housed in different racks, so the switch module 10 and the power supply module 20 can be placed in different places (for example, In the different equipment rooms, the switch module 10 and the power supply module 20 are separately managed. Please refer to FIG. 6B , which is a schematic diagram of a circuit structure of a second embodiment of the power backup system of the present invention. Referring to FIGS. 2 to 4 , the switch module 10 and the power supply module 20 are housed in the first chassis 50 . The circuit structure of the single rack is integrated by the switch module 10 and the power supply module 20, which facilitates centralized control of the power backup system 100.

Please refer to FIG. 6C , which is a schematic diagram of the physical architecture of the second embodiment of the power backup system of the present invention. Referring to FIGS. 2 to 4 and 6B, the power backup system 100 is a physical structure in which the switch module 10 and the power supply module 20 are integrated into a single rack. The first gantry 50 further includes a plurality of first accommodating spaces 51 and a plurality of second accommodating spaces 52. The first accommodating spaces 51 and the second accommodating spaces 52 are staggered and juxtaposed. Set the structure. The first accommodating spaces 51 or the second accommodating spaces 52 are respectively The switch units (Q1~Qn+1) and the power supply unit (P1~Pn+1) are accommodated, and the switch units (Q1~Qn+1) and the power supply units (P1~Pn+1) are The first accommodating space 51 and the second accommodating spaces 52 can be arbitrarily exchanged.

Referring to FIG. 6C, the power backup system 100 includes five switch units (Q1~Q5) housed in the first accommodating space 51 and five power supply units (P1~ housed in the second accommodating space 52). P5), and the switch units (Q1~Q5) and the power supply units (P1~P5) are arranged in a staggered arrangement. However, it is not limited thereto. In other words, the switching positions of the switch units (Q1~Q5) and the power supply units (P1~P5) can be arbitrarily exchanged to facilitate flexible and flexible management of the power backup system. 100. Taking FIG. 6C as an example, when the power supply unit (P1~P5) controlled by the switching unit (Q1~Q5) has only one power supply (P1-1~P5-1), the order from left to right in FIG. 6C is Q1, P1-1, Q2, P2-1 to Q5, P5-1; when the power supply unit (P1~P5) controlled by the switching unit (Q1~Q5) has two power supplies (P1-1~P5-2) ), the order from left to right in the figure is Q1, P1-1, P1-2, Q2, P2-1, P2-2 to Q5, P5-1, P5-2; its switching unit (Q1~Q5) The position of the power supply unit (P1~P5) can also be arbitrarily reversed.

Please refer to FIG. 7 , which is a flowchart of a method for operating a power backup system according to the present invention. Referring to FIG. 2 to FIG. 5, the power backup system 100 includes a plurality of switch units (Q1~Qn+1), and a plurality of power supply units (P1) corresponding to the switch units (Q1~Qn+1). ~Pn+1), and converting a power source Vs to an output power source Vo, and supplying power to a load 40, the operating method includes: first, providing a control unit, the control unit controlling the switch units to switch one of the switches The input source is the input power source (S100). The control unit 30 detects the quality of the input source, and outputs a control signal Sc to control the switch units (Q1~Qn+1) to switch to an input source suitable for the power backup system 100. Then, when one of the switch units or the power supply unit fails, the power supply units of the remaining power supply units connected to the remaining switch units can provide power greater than or equal to the power required by the load (S200). Since the power backup system 100 is a backup system of n+1, when one of the switch units (assumed to be Qn+1) or the power supply unit (assumed to be Pn+1) fails, the remaining switches are The power supplies connected to the units (Q1~Qn) are provided. The total power that can be provided by the unit (P1~Pn) is still greater than or equal to the power required by the load 40 to prevent the power backup system 100 from providing the power required by the load 40 to cause the load to fail. Finally, the power supply system includes a plurality of input sources, and when one of the input sources is abnormal, the control unit controls the switching units to switch to another input source (S300). Taking FIG. 4 to 5 as an example, the power source Vs includes a first input source Vs1 and a second input source Vs2. When the quality of one of the input sources is lower than the threshold or no input source, the control unit 30 controls the switching units (Q1~Qn+1) to be switched to another input source, so that the load can operate smoothly.

In order to maintain the power supply system more efficiently, this patent proposes a new type of high reliability redundant automatic transfer switch (ATS).

Therefore, the power backup system 100 is a backup system of n+1. When the backup system is in operation, it has n power supply units, which can supply at least the power required by the load to maintain the smooth operation of the load 40 and achieve the backup effect.

In summary, the present invention has the following advantages:

1. Since the power backup system has a plurality of automatic transfer switches (ATS) and correspondingly connected to a plurality of power supply units, it is possible to avoid failure of the entire power backup system when the automatic transfer switch (ATS) fails. efficacy;

2. The power backup system is an n+1 backup system having one redundant power supply unit and n power supply units capable of providing at least the power required by the load. And when one of the automatic transfer switches (ATS) or the power supply unit fails in operation, the power supply units of the remaining automatic transfer switches (ATS) can provide power greater than or equal to the load. The required power to achieve stable operation of the back-end load;

3. By replacing a conventional automatic transfer switch (ATS) with a plurality of automatic transfer switches (ATS), the power backup system evenly disperses the power capacity of each automatic transfer switch (ATS), and thus can be replaced by medium/ Low power capacity automatic transfer switch (ATS), no need to cooperate with this power backup system High-power automatic transfer switch (ATS) with special specifications required, so there are many types of automatic transfer switches (ATS) that are compatible with the power backup system, and avoid the cost increase due to the special specifications of the automatic transfer switch (ATS). The effect.

4. Controlling a plurality of switching units correspondingly by a plurality of control units to prevent all of the switching units from being inoperable when one of the control units is damaged, so that all power supply units do not receive power, thereby avoiding power supply The backup system is unable to provide the power required by the load and the effect of the load failure.

However, the above description is only for the detailed description and the drawings of the preferred embodiments of the present invention, and the present invention is not limited thereto, and is not intended to limit the present invention. The scope of the patent application is intended to be included in the scope of the present invention, and any one skilled in the art can readily appreciate it in the field of the present invention. Variations or modifications may be covered by the patents in this case below.

Claims (20)

A power backup system includes: a switch module comprising a plurality of switch units, each switch unit switching a power source to an input power source; and a power supply module comprising a plurality of power sources a power supply unit, wherein each power supply unit is respectively connected to each switch unit, and the power supply module converts the input power source into an output power source and supplies power to a load; wherein the number of the switch units is equal to the power sources The number of the supply units; when one of the switch units or the power supply unit fails, the remaining power supply units of the plurality of switch units can provide power greater than or equal to the power required by the load. The power backup system of claim 1, wherein the power source comprises a plurality of input sources, and the switch units switch one of the input sources of the power source to be the input power source. The power backup system of claim 2, wherein the power backup system further comprises: a control unit connecting the switch units; wherein, when one of the input sources is abnormal, the control unit controls The switching units are switched to another input source. The power supply backup system of claim 3, wherein the input sources comprise a first input source and a second input source, the switch units include: a first switch, the first input is received at one end a source, the other end is connected to one of the power supply units; a second switch, one end receives the second input source, and the other end is connected to the other end of the first switch; If the first input source is abnormal, the control unit controls the first switch to be non-conductive, and turns on the second switch to switch the switch units to output the second input source; if the second input source is abnormal The control unit controls the second switch to be non-conductive, and turns on the first switch to switch the switch units to output the first input source. The power backup system of claim 4, wherein the first switch does not conduct between the second switch, or the second switch does not conduct between the first switch, and has a Switch time. The power backup system of claim 5, wherein the switching time is within 10 milliseconds. The power backup system of claim 2, wherein the power backup system further comprises: a plurality of control units, wherein the control units are connected to the switch units; wherein, when one of the input sources is abnormal Some of the control units control the switching of the switching units to another input source. The power supply backup system of claim 7, wherein the input sources include a first input source and a second input source, the switch units include: a first switch, the first input is received at one end a source, the other end is connected to one of the power supply units; a second switch, one end receives the second input source, and the other end is connected to the other end of the first switch; wherein, if the first input source is abnormal, the The control unit controls the first switch to be non-conductive, and turns on the second switch to switch the switch units to output the second input source; if the second input source is abnormal, the control units control the second switch to be non-conductive And turning on the first switch to switch the switch units to output the first input source. The power backup system of claim 8, wherein the first switch does not conduct between the second switch, or the second switch does not conduct between the first switch, and has a Switch time. The power backup system of claim 9, wherein the switching time is within 10 milliseconds. The power backup system according to claim 1, wherein the switch units are automatic transfer switches. The power backup system of claim 1, wherein the power backup system further includes a first rack, and the switch module and the power supply module are disposed in the first rack. The power supply backup system of claim 12, wherein the first rack further includes a plurality of first accommodating spaces and a plurality of second accommodating spaces, and the first accommodating spaces and the first accommodating spaces The two accommodating spaces are staggered and juxtaposed accommodating structures. The power supply backup system of claim 13, wherein the first accommodating space or the second accommodating space respectively accommodates the switch unit and the power supply units, and the switch units The power supply unit can be arbitrarily exchanged between the first accommodating space and the second accommodating spaces. The power backup system of claim 1, wherein the power backup system further includes a first chassis and a second chassis, the first chassis accommodating the switch module, the first The two racks house the power supply module, and the switch module is connected to the power supply module. The power backup system of claim 1, wherein each power supply unit comprises at least one power supply, and the input power is converted to an output power, and when one of the switch units or the power supply unit fails The at least one power supply corresponding to the connection does not output the output power, or cannot provide the same power as the other power supply units. A power backup system operating method, the power backup system includes a plurality of switch units, and a plurality of power supply units corresponding to the switch unit, the number of the switch units being equal to the number of the power supply units, and the power source The supply module converts the plurality of input sources into an output power source and supplies power to a load. The operation method includes: (a) providing a control unit, wherein the control unit controls the switch units to switch one of the input sources to the Input power; (b) when one of the switch units or the power supply unit fails, the power supply units of the remaining power supply units connected to the switch units are greater than or equal to the power required by the load; c) The power supply system includes a plurality of input sources, and when one of the input sources is abnormal, the control unit controls the switching units to switch to another input source. The power supply backup system operating method of claim 17, wherein the input source comprises a first input source and a second input source, wherein if the first input source is abnormal, the control unit controls the The switch unit switches the first input source to the second input source; if the second input source is abnormal, the control unit switches the switch units to switch the second input source to the first input source. The method for operating a power backup system according to claim 18, wherein the control unit controls the switch units to switch the first input source to the second input source, or switch the second input source to the first There is a switching time between input sources. The method of operating a power backup system according to claim 19, wherein the switching time is within 10 milliseconds.