CN111130205A

CN111130205A - Backup power supply system, control method thereof and storage medium

Info

Publication number: CN111130205A
Application number: CN201811280814.XA
Authority: CN
Inventors: 陈炎昌; 徐伟轩; 陈炎其
Original assignee: Shenzhen Zhonghanyun Technology Co Ltd
Current assignee: Shenzhen Hangyi Intellectual Property Services Co ltd
Priority date: 2018-10-30
Filing date: 2018-10-30
Publication date: 2020-05-08
Anticipated expiration: 2038-10-30
Also published as: CN111130205B

Abstract

The embodiment of the application discloses a backup power supply system, a control method thereof and a storage medium. The backup power supply system may include: n +1 uninterrupted power supplies UPS, wherein N is a positive integer; at least one switch set, wherein one of the switch sets comprises: the UPS comprises N controlled switches, a UPS and a power supply circuit, wherein the N controlled switches can be switched between two power supply circuits, the power supply circuits conducted by the N controlled switches are different, and the UPS connected with the N controlled switches is different; and the control module is connected with the controlled switch and is at least used for controlling the controlled switch to switch the conducted power supply loop according to the power supply state of the conducted power supply loop.

Description

Backup power supply system, control method thereof and storage medium

Technical Field

The present disclosure relates to the field of power supply technologies, and in particular, to a backup power supply system, a control method thereof, and a storage medium.

Background

In order to reduce the Power failure of the external Power supply of the backup Power supply System, an Uninterruptible Power Supply (UPS) is provided in the backup Power supply System to supply Power. However, in the process of supplying power by using an uninterruptible power supply, a plurality of main UPSs and a fixed common backup UPS are provided in order to ensure power supply stability.

Researches find that the backup power supply system of the fixed public backup UPS has the problem of inflexible UPS power supply; and if a plurality of UPS breaks down, only one backup UPS supplies power, and power supply abnormity such as overload phenomenon and the like easily occurs.

Disclosure of Invention

In view of the above, embodiments of the present application are intended to provide a backup power supply system, a control method thereof, and a storage medium.

The technical scheme of the application is realized as follows:

a backup power supply system comprising:

n +1 uninterrupted power supplies UPS, wherein N is a positive integer;

at least one switch set, wherein one of the switch sets comprises: n controlled switches; the controlled switch can be switched between two power supply loops, the conducted power supply loops of the controlled switch are different, and the UPS connected with the controlled switch is different;

and the control module is connected with the controlled switch and is at least used for controlling the controlled switch to switch the conducted power supply loop according to the power supply state of the conducted power supply loop.

Based on the above scheme, if the backup power supply system is an N-channel power supply system, the number of the switch groups is N, where N is a positive integer.

Based on the above scheme, the control module comprises:

the first controller is connected with the controlled switch through a control bus;

the second controller is connected with the controlled switch through the control bus;

the first controller and the second controller are backup controllers.

Based on the above scheme, the control bus comprises:

the first bus is respectively connected with the first controller, the second controller and the controlled switch;

the second bus is respectively connected with the first controller, the second controller and the controlled switch;

wherein the first bus and the second bus are backups of each other.

Based on the above scheme, the control module is specifically configured to maintain the power supply loop switched on by the controlled switch if the power supply state of the currently switched-on power supply loop is normal;

and/or the presence of a gas in the gas,

and the control module is also used for controlling a controlled switch corresponding to the power supply state abnormal power supply loop to switch the conducted power supply loop if the power supply state is abnormal due to the power supply fault of one UPS.

Based on the above scheme, the control module is further configured to obtain a mapping relationship between the UPS and the controlled switches, and if the mapping relationship indicates that one UPS is currently connected to two conducted power supply loops, control one or more controlled switches to switch the conducted power supply loops to ensure that one UPS supplies power to loads not exceeding a predetermined number of paths.

Based on the above scheme, the control module is further configured to control at least one UPS to be connected to a power supply loop where at least two paths of loads are located according to a load condition of multiple paths of power supply loops if the multiple UPS fails, where a load value of the power supply loop where the at least one UPS is connected meets a preset load condition.

A control method of a backup power supply system, the backup power supply system comprising: n +1 Uninterruptible Power Supplies (UPSs), the method comprising:

acquiring a power supply state of a power supply loop conducted by at least one switch group, wherein one switch group comprises: n controlled switches; the controlled switch can be switched between two power supply loops, the conducted power supply loops of the controlled switch are different, and the UPS connected with the controlled switch is different;

and controlling the switching of the power supply loop conducted by the controlled switch according to the power supply state.

Based on the above scheme, the controlling the switching of the power supply loop conducted by the controlled switch according to the power supply state includes:

according to the power supply state of the current conducting loop of the controlled switch, if the power supply state is normal, maintaining the conducting power supply loop of the controlled switch;

and/or the presence of a gas in the gas,

and if the power supply state is abnormal due to the power supply fault of one UPS, controlling a controlled switch corresponding to the power supply state abnormal power supply loop to switch the conducted power supply loop.

Based on the above scheme, the method further comprises:

according to the UPS connected with the controlled switch, establishing a mapping relation between the controlled switch and the UPS;

and if the mapping relation indicates that one UPS is currently connected in the two conducted power supply loops, controlling one or more controlled switches to switch the conducted power supply loops so as to ensure that one UPS supplies power to loads not exceeding a preset number of paths.

Based on the above scheme, the method further comprises:

and if the power supply faults of the multiple UPSs exist, acquiring the load conditions of the multiple power supply loops, and controlling at least one UPS to be connected to the power supply loop where the at least two loads are located, wherein the load value of the power supply loop connected with the at least one UPS meets the preset load condition.

Based on the above scheme, the load value of the power supply loop connected to the at least one UPS satisfies a preset load condition, which includes at least one of:

the load value of any power supply circuit connected with the at least one UPS is smaller than a first load threshold value;

the sum of the load values of at least two power supply circuits connected with the at least one UPS is smaller than a second load threshold value;

and when the load values of at least two power supply circuits connected with the at least one UPS are the minimum, the load values in all the power supply circuits are the minimum.

A computer storage medium having computer executable code stored thereon; the computer executable code can be used for realizing the control method of the backup power supply system provided by one or more of the technical schemes after being executed.

In the backup power supply system, the control method thereof and the storage medium provided by the embodiment of the application, N +1 UPSs are connected with at least one switch group, and one switch group at least comprises N controlled switches; through the introduction of the control module, the power supply loop conducted by the controlled switch is controlled, so that the UPS supplying power to the load is controlled. Therefore, in the scheme provided by the embodiment of the application, a special fixed backup UPS is not needed, so that the UPS can be flexibly connected and flexibly powered by the UPS.

Drawings

Fig. 1 is a schematic structural diagram of a backup power supply system;

FIG. 2 is a schematic diagram of a backup power system with a UPS power failure;

fig. 3 is a schematic structural diagram of a backup power supply system according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a backup power supply system according to an embodiment of the present disclosure;

fig. 5 is a schematic flowchart of a control method for a backup power supply system according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a backup power supply system according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a backup power supply system according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a backup power supply system according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram illustrating a UPS power failure in a backup power supply system according to an embodiment of the present disclosure;

fig. 10 is a schematic flowchart of another backup power supply system control method according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a backup power supply system according to an embodiment of the present application.

Detailed Description

Fig. 1 shows a backup power supply system, which includes:

5 Main Switch boards (Main Switch Board, MSB);

5 UPS, UPS-1, UPS-2, UPS-3, UPS-4 and UPS-5; wherein, the UPS-5 is a fixed backup UPS;

5 Static Transfer Switch (STS).

In the backup power supply system shown in fig. 1, all STS must be set with a primary loop and a backup loop, and the priority of the primary loop is higher than that of the backup loop. And each STS has a self-switching and self-resetting function, it is necessary to ensure that only one STS is powered by the backup loop at any time through a program.

As shown in fig. 1, each main switch board MSB is supplied with a backup generator and a transformer. When the transformer powered by the commercial power loses power, the generator can be automatically started and switched to the generator for power supply through the change-over switch of the MSB of the main power distribution cabinet. When any one of UPS-1 to UPS-4 is in fault, the corresponding STS is switched to the backup loop and the power is supplied by the public backup loop.

As shown in FIG. 2, if UPS-2 fails (e.g., USP-2 is not running/supplying online), STS-2 is switched from source S1 to source S2, powered by the common backup UPS-5. When the UPS-2 is restored to the power supply online state, the STS-2 is automatically reset to S1 (set to the self-switching and self-resetting function) from S2, and the backup power supply system diagram is restored to the diagram of FIG. 1 from FIG. 2.

In the backup power supply system shown in fig. 1, the UPS-5 is fixed as a backup UPS, and the backup power supply system is inflexible in power supply. And for using the common backup UPS, all STSs have and only one STSs are supplied by the common backup UPS, otherwise, when a plurality of STSs are simultaneously supplied by the common backup UPS (such as UPS-5 in fig. 2), the possibility of UPS-5 overload and related failure occurs.

In view of this, in the embodiments of the present application, in order to achieve flexible connection and flexible power supply of each UPS, or to reduce as much as possible a phenomenon such as power supply abnormality due to an overload phenomenon. The backup power supply system provided by the embodiment of the application is provided with N +1 UPSs, the UPSs with the head and tail numbers are only connected to 1 power supply loop, and the other UPSs except the head and tail numbers are connected to 2 power supply loops; setting 2N controlled switches, wherein one controlled switch can be connected with at least two power supply loops; and a controller is introduced to flexibly control the power supply loop conducted by the controlled switch. Therefore, a fixed standby UPS is not required to be specially arranged, and flexible connection and flexible power supply of the UPS are achieved. And because the controller controls the current power supply loop of the controlled switch, the UPS for supplying power can be flexibly set according to the power supply requirement, for example, the connection condition of the controlled switch is flexibly controlled based on the load, so that the power supply of the UPS is flexibly controlled, the overload phenomenon easily occurring in fixed connection is reduced, and the power supply abnormity is reduced.

The technical solution of the present application is further described in detail with reference to the drawings and specific embodiments of the specification.

As shown in fig. 3, the present embodiment provides a backup power supply system, including:

n +1 uninterrupted power supplies UPS, wherein N is a positive integer;

at least one switch set, wherein one of the switch sets comprises: the N controlled switches can be switched between two power supply loops, the conducted power supply loops of the controlled switches are different, and the UPS connected with the controlled switches is different;

and the control module is connected with the controlled switch and at least used for controlling the controlled switch to switch the conducted power supply loop according to the power supply state of the conducted power supply loop and controlling the switching of the conducted power supply loop of the controlled switch.

In some embodiments, the UPS may be an energy storage or power device, such as a converter and a battery.

In other embodiments, the UPS may be other forms of power supplies including: an energy storage portion and a power supply portion; when an external power supply (for example, commercial power) normally supplies power, the energy storage part can convert alternating current power supply into direct current power supply through a rectifier to store the direct current power supply; the power supply part can be used for converting the energy of the energy storage part into electric energy to be output to a load when the input power of commercial power and the like is lost. Therefore, when the external input power supply is not on-line or abnormal, the UPS can continuously supply power to the load by using the energy storage part until the input of the external power supply is recovered to be normal.

In the embodiment of the present application, if N +1 UPSs are provided, at least one switch set is provided, where one switch set includes: n controlled switches. For example, if 4 UPSs are provided in the backup power supply system, one switch group includes 3 controlled switches.

In FIG. 3, N +1 UPSs, respectively, UPS1, UPS2, UPS3, through UPS N + 1; the backup power supply system is provided with a switch group, wherein the switch group comprises N controlled switches from a controlled switch 1 to a controlled switch 2 to a controlled switch 3 to a controlled switch N. As shown in fig. 1, the conducting power supply loop can be switched by switching of the controlled switch.

The controlled Switch may be various types of controlled switches, for example, various types of controlled switches such as an STS or an Automatic Transfer Switch (ATS).

In some embodiments, if the backup power supply system is an N-channel power supply system, the number of the switch sets is N, where N is a positive integer. The value of N can be 1, 2, 3 or 6.

In this embodiment, one power source may correspond to one UPS or one power supply loop.

For example, when the backup power supply system is a single-path power supply system, the backup power supply system includes a switch group, and a controlled switch in the switch group turns on a power supply loop.

For another example, when the backup power supply system is a dual-path power supply system, 1 controlled switch (2 controlled switches in total) from 2 switch groups in the backup power supply system forms a power supply group pair, and the same load is subjected to dual-path power supply by using different UPSs. In the case of a two-way supply, in order to further increase the stability of the supply, the loads coming from different switch groups and connected to controlled switches that can be connected to the same UPS are different. In the case of the dual power supply shown in fig. 4, the backup power supply system includes 2 switch sets. The 2 switch groups shown in fig. 4 include N controlled switches, respectively.

In some embodiments, the 1 st switch group includes N controlled switches that are: STS 1-1,

STS 1-2, STS 1-3 up to STS 1-N; the 2 nd switch group comprises N controlled switches which are respectively: STS2-1, STS 2-2, STS 2-3 up to STS 2-N. The double-circuit power supply supplies power to N loads respectively, and the N loads are numbered as follows: load 1, load 2, load 3 up to load N. In this way, one load is supplied with power by two power supply loops and the two loads can be connected to different UPSs, so that when the UPS of the connected load cannot supply power, the load can also supply power by the UPSs normally supplied by other departments, and the reliability of the backup power supply system is improved so as to improve the usability. Of course, in some embodiments, the two-way load may also be connected to the same UPS.

For another example, when the load of the backup power supply system includes an IT load, in order to ensure the power supply reliability of the IT load, 3 UPS or 6 UPS may be configured for the IT load, and so on, 3 or 6 switch sets may be correspondingly configured for the IT load in the backup power supply system.

In the embodiment of the present application, a load is connected to the power supply circuit. The load connected in a power supply loop may be referred to as a load. In the present embodiment, the load may be various types of power consuming devices, such as a load formed by an information service system, a load formed by lighting, a load formed by motor operation, and the like.

In some embodiments, two controlled switches of the UPS are connected within two switch groups, with different loads connected. Therefore, the phenomenon that the load cannot obtain power supply when the UPS connected with the two controlled switches connected with the load has faults is avoided.

As shown in fig. 4, the control module may include: one or more controllers; the controller can be various integrated circuits or packaged control devices, such as a single chip microcomputer, an application specific integrated circuit, a field programmable array or a complex programmable array.

In this embodiment, the control module is connected to each controlled switch, and can control the switching state of each controlled switch and the power supply loop connected thereto. For example, if the controlled switch includes a multiplexer, the control module may control a terminal to which the multiplexer is connected, so as to control a power supply loop conducted by the controlled switch, so as to control the UPS currently in a power supply state.

In summary, in the present embodiment, at least one switch set is provided, wherein one switch set comprises: the introduction of N controlled switches and a control module realizes flexible connection and flexible power supply of any UPS in a backup power supply system; meanwhile, due to the control function of the controller, the current power supply load number of the UPS, the load value of a single load and the like can be flexibly controlled, and the occurrence of power supply abnormal phenomena such as overload phenomena and the like can be reduced.

In some embodiments, the control module comprises:

the first controller and the second controller are backup controllers.

In order to ensure the power supply stability of the backup power supply system, the control module comprises two controllers, and the two controllers are backup to each other.

For example, if the first controller is an active controller, the second controller is a standby controller, and if the first controller works normally, the first controller is in a control state for the backup power supply system, and the second controller is in a standby state; if the first controller is abnormal, the second controller can be quickly switched from a standby state to a control state of the backup power supply system.

The control bus may be various types of buses. For example, the control bus may be: integrated circuit bus (I)²C) Or a communication BUS such as a controller area network BUS (CAN BUS).

In some embodiments, the control bus comprises:

wherein the first bus and the second bus are backups of each other.

In this embodiment, the control bus also includes the first bus and the second bus, so that a bus backup is realized, and if one of the buses is abnormal, the other bus is in a normal state, and the control of the control module on the controlled switch can be maintained.

In some embodiments, the control module, specifically according to a power supply state of a current connection loop of the controlled switch, maintains a power supply loop conducted by the controlled switch if the power supply state is normal;

and/or the presence of a gas in the gas,

If the power supply of the power supply loop connected to the currently controlled switch is normal, for example, there is no short circuit, open circuit, overvoltage or no power output state, the power supply can be considered to be normal, and thus, at least one switch group can be maintained, wherein one switch group includes: and the power supply loops conducted by the N controlled switches do not need to be switched, namely the power supply loops accessed by the controlled switches are not needed to be switched.

If the power supply loop connected to the currently controlled switch is abnormal in power supply, for example, an excessively low voltage or an excessively high voltage exceeding an allowable voltage range occurs, once the control module finds such a condition, it needs to switch the power supply loop on which at least a part of the controlled switch is conducted. The at least partially controlled switch herein may comprise: 1 or more controlled switches.

In some embodiments, the control module is further configured to obtain a mapping relationship between the UPS and the controlled switches, and if the mapping relationship indicates that one UPS is currently connected to two conducting power supply loops, control one or more of the controlled switches to switch the conducting power supply loops to ensure that one UPS supplies power to no more than a predetermined number of loads.

Table 1 shows a mapping relationship between a controlled switch and a UPS in a single-circuit power supply according to an embodiment of the present disclosure.

TABLE 1

Table 2 shows a mapping relationship between the controlled switch and the UPS in the dual-path power supply according to the embodiment of the present application.

TABLE 2

In short, if a controlled switch conducts a power supply loop where a UPS is located, a mapping relationship is established between the controlled switch and the UPS.

In some embodiments, the control module is further configured to control at least one UPS to be connected to a power supply loop of at least two paths of loads according to a load condition of the multiple paths of power supply loops if there is a power supply failure of the multiple UPSs, where a load value of the power supply loop to which the at least one UPS is connected satisfies a preset load condition.

If at least two UPSs can not supply power (namely UPS power supply failure) due to special conditions, one UPS is selected to supply power to different loads according to the load condition of each power supply loop.

The load may be various types of loads, such as an IT load, general lighting, a motor, or a home appliance.

In the design of the load of each power supply loop in the backup power supply system, the problem of load balancing is considered, and the load values on different power supply loops are matched with the power supply capacity of the UPS, but in the actual application process, because the on-off state of the load still causes the power consumption loads of different loops which are actually in the working state to be different, in this embodiment, one UPS can be used for supplying power to a plurality of light loads when a plurality of UPSs have power supply faults according to the load condition.

For example, in an IT load, when the power supply of an external power source such as the commercial power is abnormal, if a certain part is idle and many computers or experimental devices are in a closed state, the actual power consumption load is small at this time, and the load value of a power supply loop corresponding to the load is relatively low. If a plurality of UPS power supply faults occur at the moment, the part and another part with lighter load can share one UPS power supply.

Therefore, continuous power supply when external power supply is abnormal is achieved, the overload condition caused by the fact that the UPS can only supply power to the fixed power supply loop is reduced, and the power supply stability is improved.

As shown in fig. 5, this embodiment provides a method for controlling a backup power supply system, where the backup power supply system includes: n +1 Uninterruptible Power Supplies (UPSs), the method comprising:

step S110: acquiring a power supply state of a power supply loop conducted by at least one switch group, wherein one switch group comprises: n controlled switches; the controlled switch can be switched between two power supply loops, the conducted power supply loops of the controlled switch are different, and the UPS connected with the controlled switch is different;

step S120: and controlling the switching of the power supply loop conducted by the controlled switch according to the power supply state.

The control method of the backup power supply system in this embodiment may be applied to the backup power supply system provided in any one of the foregoing technical solutions, where the power supply state may include: normal output power and power output abnormality; specifically, the current detection can be realized by detecting the current by a meter provided on each power supply circuit.

After the power supply state is detected, whether the current power supply loop can normally supply power can be known. If the power supply can not be normally supplied, one or more controlled switches in the switch group are required to be controlled to switch the conducted power supply loop, so that the normal power supply of the backup power supply system on the loop where the load is located is ensured.

In some embodiments, the step S120 may include:

according to the power supply state of the current conducting loop of the controlled switch, if the power supply state is normal, maintaining the conducting power supply loop of the controlled switch; and/or if the power supply state is abnormal due to the power supply failure of one UPS, controlling a controlled switch corresponding to the power supply state abnormal power supply loop to switch the conducted power supply loop.

In other embodiments, the method further comprises: according to the UPS connected with the same group of controlled switches, establishing a mapping relation between the controlled switches and the UPS; and if the mapping relation indicates that one UPS is currently connected in the two conducted power supply loops, controlling one or more controlled switches to switch the conducted power supply loops so as to ensure that one UPS supplies power to loads not exceeding a preset number of paths.

If the mapping relationship is scanned, it is found that one UPS is connected to two power supply loops, which indicates that one UPS simultaneously supplies power to two loads, and an overload phenomenon may occur. At this time, one or more controlled switches are controlled to switch the conductive power supply loop, so that the number of load circuits supplied by one UPS is controlled. For example, if the predetermined number of lines is 1, one UPS can supply power to at most one load by switching the power supply loop that is turned on by the controlled switch. If the preset path number is 2, one UPS can supply power to the 1-path or 2-path load by switching the power supply loop conducted by the controlled switch.

In some embodiments, the method further comprises: and if the power supply faults of the multiple UPSs exist, acquiring the load conditions of the multiple power supply loops, and controlling at least one UPS to be connected to the power supply loop where the at least two loads are located, wherein the load value of the power supply loop connected with the at least one UPS meets the preset load condition.

In this embodiment, if the multiple UPSs fail to supply power, in order to ensure continuous power supply after the external power supply is disconnected, the load condition of the multiple power supply loops is automatically obtained, at least two paths of loads are selected to be connected to one UPS based on the load condition, and one UPS supplies power; on one hand, the overload phenomenon can be avoided, and on the other hand, the normal power supply is ensured.

In some embodiments, if the UPS fails, the load value connected to each UPS may not exceed the maximum load value of the UPS according to the power supply capability (e.g., maximum output power) of the UPS, so as to reduce overload as much as possible.

In some embodiments, the load value of the power supply circuit to which the at least one UPS is connected satisfies a predetermined load condition, which includes at least one of:

In some embodiments, the first load threshold and the second load threshold are adapted to a maximum load of a UPS.

In some specific cases, due to power supply failure of multiple UPSs, if it is ensured that the load connected to each UPS does not exceed the maximum load, there may be a case where one or more loads cannot be supplied with power, in this embodiment, in order to prioritize each load to be powered on, multiple loads with small loads may be connected to one UPS as much as possible while ignoring a few UPSs to be overloaded, so that as few UPSs as possible are overloaded; and meanwhile, each load is ensured to be supplied with power.

In some embodiments, the control module in the backup power supply system may also preferentially disconnect a power supply loop where a load with a lower priority level is located and switch the UPS to a power supply loop where a load with a higher priority level is located to supply power, according to the power supply priority level of each load, if the UPS cannot bear the power supply of all the loads.

The present embodiment also provides a computer storage medium, in which computer executable code is stored; the computer executable code can be used to implement a control method of the backup power supply system provided by one or more of the above technical solutions, for example, the method shown in fig. 5 and/or fig. 10.

The computer storage media provided by the present embodiments may be non-transitory storage media.

Several specific examples are provided below in connection with any of the embodiments described above:

example 1

Fig. 6 is a block diagram of a backup power supply system with dynamic backup switching according to this example.

This example may be applied to other STS or ATS common backup domains using N + 1. In fig. 6, the IT load is powered by dual power sources, power is taken from the outputs of any two STS devices, and STS is configured to be 2N (N is the number of UPS devices meeting the requirement of the lowest power supply capacity). As can be seen, the STS configuration is divided into 2 groups of STS, one group being STS-10, STS-20, STS-30, and the other group being STS-11, STS-21, STS-31. The power supply status of all STS is connected to the control bus, for example, there are 2 controllers in fig. 6, and the number of the controllers is not limited to 2. The control bus may be provided with redundancy, for example, a first bus, a second bus, a third bus, or the like.

Fig. 7 shows a simplified case where only one power supply is provided. Fig. 7 shows 5 UPS's forming a 4+1 redundancy, where the solid lines indicate that the UPS's are supplying power to the power loop conducted by the STS and the dashed lines indicate not supplying power.

Example 2:

referring to fig. 7, a practical case is used for illustration, and fig. 8 shows the switching status of STS as S1 and S2, where STS-1 to STS-4 are in S1 status but not in S2 status. And the switching states of the STS are different, and the conducted power supply loops are different.

Fig. 9 is a schematic connection diagram of a backup power supply system in case of UPS-2 power supply failure, and according to the control method of the backup power supply system provided in the embodiment of the present application, the turned-on power supply loop can be switched by a controlled switch (e.g., the STS power supply system in fig. 9 and the STS switching control method in fig. 10). Fig. 11 is a schematic connection diagram after the controlled switch switches the conductive loop.

When the power supply of the UPS-2 fails, a control method of the backup power supply system shown in fig. 10 may be adopted, and the control method may include:

recording the original switching states of all STSs (for example, originally in S1 or S2), and establishing a mapping relation between the UPS and the STS;

checking whether the power supply state of the power supply loop conducted by S1/S2 of all STSs is normal;

if yes, the STS keeps the original switching state;

if not, determining and recording the STS corresponding to the power supply loop with the circuit output fault, and preparing to switch the switched power supply loop;

checking whether the mapping relation between the switched STS and the UPS is mapped to the same UPS as another STS after the STS is switched; if yes, confirming the superposition state, and the STS needs to be switched; if not, the switching of the related STS is executed at the same time.

Taking fig. 8 as an example, the following mapping relationship between the status of STS and UPS is established, as shown in table 3.

TABLE 3

As can be seen from table 3, the original switching states of STS-1 to STS-4 are all S1, and thus, different UPSs are connected in the power supply loops through which STS-1 to STS-4 are conducted.

TABLE 4

When the UPS-2 is in a power supply failure, the switching S1 is switched to S2, so that the power supply loops conducted by the STS-2 and the STS-3 are connected with the UPS-3, and the UPS-3 needs to supply power to two loads.

Accordingly, the switching status of the STS-3 needs to be switched, and the switching status of the STS-3 is switched from S1 to S2, so that the mapping relationship between the STS and the UPS is shown in table 5.

TABLE 5

When the power supply loops which are switched on under the current switching states of the STS-2 and the STS-3 are detected to be supplied with power by the UPS-4, the switching state of the STS-4 needs to be further adjusted; the switching status of STS-4 is switched from S1 to S2. After the switching status of STS-4 is switched from S1 to S2, the mapping relationship between STS and UPS is shown in table 6.

TABLE 6

In summary, when the power loss of the power supply loop conducted in the S1 state of the STS-2 is found, the STS-2 needs to be switched from S1 to S2, the STS-2 needing to be switched is recorded, when the STS-2 is at the source S2, both the STS-2 and the STS3 correspond to the UPS-3, and a duplicate mapping relationship occurs, then the STS-3 also needs to be switched to the source S2, and the same process continues to check the STS-3 and the STS-4, and finally, it is ensured that the mapping relationships of all STSs and UPSs are not overlapped by 1 to 1.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all functional units in the embodiments of the present application may be integrated into one processing module, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A backup power supply system, comprising:

n +1 uninterrupted power supplies UPS, wherein N is a positive integer;

2. The backup power supply system according to claim 1,

and if the backup power supply system is an N-path power supply system, the number of the switch groups is N, wherein N is a positive integer.

3. The backup power supply system of claim 1, wherein said control module comprises:

the first controller and the second controller are backup controllers.

4. The backup power supply system according to claim 3,

the control bus includes:

wherein the first bus and the second bus are backups of each other.

5. The backup power supply system according to any one of claims 1 to 4,

the control module is specifically configured to maintain the power supply loop switched on by the controlled switch if the power supply state of the currently switched-on power supply loop is normal;

and/or the presence of a gas in the gas,

6. The backup power supply system according to claim 5,

the control module is further configured to obtain a mapping relationship between the UPS and the controlled switches, and if the mapping relationship indicates that one UPS is currently connected to two conducted power supply loops, control one or more controlled switches to switch the conducted power supply loops to ensure that one UPS supplies power to loads not exceeding a predetermined number of paths.

7. The backup power supply system according to any one of claims 1 to 4,

the control module is further configured to control at least one UPS to be connected to a power supply loop where at least two paths of loads are located according to a load condition of multiple paths of power supply loops if the multiple UPS fails, where a load value of the power supply loop where the at least one UPS is connected meets a preset load condition.

8. A backup power supply system control method is characterized in that the backup power supply system comprises: n +1 Uninterruptible Power Supplies (UPSs), the method comprising:

9. The method of claim 8,

the controlling the switching of the power supply loop conducted by the controlled switch according to the power supply state comprises:

and/or the presence of a gas in the gas,

10. The method according to claim 8 or 9,

the method further comprises the following steps:

11. The method according to claim 8 or 9,

the method further comprises the following steps:

12. The method of claim 11,

the load value of the power supply loop connected with the at least one UPS meets a preset load condition, and the load value comprises at least one of the following conditions:

13. A computer storage medium having computer executable code stored thereon; the computer executable code, when executed, is operable to implement a method of controlling a backup power supply system as provided in any of claims 8 to 12.