CN112542830A - Power supply system - Google Patents

Disclosure of Invention

In view of the above, it is desirable to provide an electrical system according to embodiments of the present application.

The technical scheme of the application is realized as follows:

an embodiment of the present application provides a power supply system, including:

the output end of each power supply module is connected with one power supply bus, wherein different power supply modules are connected to different power supply buses, and N is a positive integer greater than or equal to 4;

n load module, wherein, each load module includes: n-1 power supply branches perform distributed power supply on a load;

the input end of the power supply branch is connected with the two power supply buses; one of the two power supply buses connected with different power supply branches in one load module is different; one path of load is connected with the output ends of the two power supply branches; at least one of the two power supply branches connected with the loads in different paths in one load module is different.

Based on the scheme, each power supply branch is provided with a first uninterrupted power supply UPS;

the input end of the first UPS is connected with the two power supply buses;

and the output end of the first UPS is connected with the two paths of power supply loads.

Based on the scheme, different power supply branches in the mth load module are connected to the mth power supply bus;

the power supply system further includes: n second-type UPSs;

the first end and the second end of the mth second type UPS are both connected to the mth power supply bus, wherein m is a positive integer smaller than or equal to N.

Based on the scheme, the output end of the power supply module is connected with a third UPS;

the output end of the third type UPS is connected to one power supply bus.

Based on the scheme, each power supply branch is provided with a static selector switch;

the two input ends of the static selector switch are respectively connected with the two power supply buses;

and the output end of the static selector switch is respectively connected with the two paths of loads for supplying power of the same load module.

Based on the scheme, each power supply branch is provided with an automatic change-over switch and high-voltage direct-current power supply equipment connected with the automatic change-over switch in series;

the two input ends of the automatic change-over switch are respectively connected with the two power supply buses;

the output end of the automatic change-over switch is connected with the high-voltage direct-current power supply equipment;

and the output end of the high-voltage direct-current power supply equipment is connected with the two paths of loads for power supply.

Based on the above scheme, the power module includes: an automatic transfer switch and a generator;

the automatic change-over switch comprises two input ends and an output end;

one input end of the automatic change-over switch is used for being connected with a mains supply system, and the other input end of the automatic change-over switch is connected with the generator;

the output end of the automatic change-over switch is connected to one power supply bus through the UPS or directly connected to one power supply bus.

Based on the above scheme, the load comprises: an IT load and/or a dual power supply load.

Based on the scheme, each power supply branch is also provided with a power distribution assembly;

the power distribution assembly is used for providing power distribution for two paths of loads connected with the power supply branch.

Based on the scheme, each power supply branch comprises a main input end and a standby input end, and the standby input ends of different power supply branches in the same load module are connected with different power supply buses; and the main input ends of different power supply branches in one load module are connected with the same power supply bus;

when the power supply of the main input end is normal, the standby input end is in a non-power supply state.

The power supply system that this application embodiment provided, N power supply module can use N-1 power supply branch road to carry out the redundant power supply of distributing type to load module, and simultaneously, each power supply module all can have certain surplus power supply capacity, and surplus power supply capacity, form power supply bus connection to all the other power supply modules through a power supply branch road of this application, can realize the redundancy backup, thereby each way power supply branch road of first aspect all has the redundancy of the power supply of different backup buses, in order to ensure the continuity of supplying power. In the second aspect, each power supply module is directly connected to the power supply branch for supplying power, so that even if the abnormal condition of the power supply module is not existed, the loading rate of each power supply module cannot be zero, and the operating efficiency of the power supply module is improved. In a third aspect, the residual power of each power supply bus can be used as a common backup bus of other power supply buses, so that the number of the common backup buses in the power supply system provided in the embodiment of the present application is equivalent to that of the common backup buses, a distributed design of the common backup buses is realized, the probability of failure of each of the plurality of power supply buses is very small, and the safety and reliability of the power supply system are improved again.

Detailed Description

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 power supply system including:

the output end of each power supply module is connected with one power supply bus, wherein different power supply modules are connected to different power supply buses, and N is a positive integer greater than or equal to 4;

n load module, wherein, each load module includes: n-1 power supply branches and loads are subjected to distributed power supply;

the input end of the power supply branch is connected with the two power supply buses; one of the two power supply buses connected with different power supply branches in one load module is different; one path of load is connected with the output ends of the two power supply branches; at least one of the two power supply branches connected with the loads in different paths in one load module is different.

In some embodiments, the remaining one path of the power supply module is connected to any one power supply branch of the remaining load modules as a common backup power supply bus as a backup power supply branch.

The power supply system provided by the embodiment of the application can be applied to power supply for a data center, and is a power supply system of the data center, but the power supply system is not limited to power supply for the data center. In this embodiment, the N power supply modules may be arranged in parallel in the power supply system.

In the power supply system shown in fig. 3, N is 4, and a value of N may be any positive integer greater than 4 in specific implementation, for example, N may be a value such as 5 or 6.

The power supply structures of the power supply modules can be the same, or one or more power supply parameters in the power supply parameters are the same. The power supply parameters may include: maximum output power, maximum output current, maximum output voltage, average output power, average output current, rated output power, rated output voltage, and rated output current.

When the structures of the power supply modules are the same and the power supply parameters are the same, the normal operation of the power supply system is convenient to maintain.

In the embodiment of the present application, one of the load modules includes N-1 power supply branches, and one of the power supply branches is connected to one of the loads.

The rated output power of the single power supply module is larger than the average power required by the load module. Therefore, each power supply module can supply power to the power supply module normally, and can also have residual power, and the residual power is transmitted to the power supply bus, so that redundant backup of power supply is realized, and the continuity of power supply is ensured. Meanwhile, each power supply module is connected to at least four power supply branches, so that each power supply module is in a power supply state, and the power supply module cannot have the condition that the load factor is zero, so that the application efficiency of the whole power supply system is ensured compared with the power supply system comprising the power supply modules with pure redundancy backup.

In the embodiment of the present application, the N load modules are connected in parallel to the output end of the power supply system.

In some embodiments, each of the power supply branches is provided with a first uninterruptible power supply UPS;

the input end of the first UPS is connected with the two power supply buses;

and the output end of the first UPS is connected with the two paths of power supply loads.

The UPS can output the alternating current voltage to the alternating current load in a voltage stabilizing mode, meanwhile, part of input alternating current is used for charging the backup energy storage device, and stored electric energy is directly output to the direct current load or is output to the alternating current load after being converted into alternating current when no alternating current is input subsequently. In a word, the UPS can store the residual electric quantity through a storage battery in the UPS, and continuously supplies power to the load under the condition of short-time power failure.

In some embodiments, one of the power supply branches is connected to one of the first type UPSs.

Fig. 4 is a schematic diagram of a power supply system including a first type UPS for a load module.

In some embodiments, different power supply branches in the nth load module are connected to the nth power supply bus; the power supply module connected with the nth power supply bus is a main power supply module of the nth load module; n is a positive integer less than or equal to N;

the input end of the first type UPS of the nth load module comprises:

the input end of the main circuit is connected with the main power supply module of the nth load module;

the input end of the bypass is connected with the other power supply bus except the nth power supply bus;

and the output end is connected with the load of the nth load module which supplies power by two paths.

In some embodiments, different power supply branches in the mth load module are connected to the mth power supply bus; the power supply system further includes: n second-type UPSs;

the first end and the second end of the mth second type UPS are both connected to the mth power supply bus, wherein m is a positive integer smaller than or equal to N.

In the embodiment of the application, the first type UPS and the second type UPS are both UPSs.

Therefore, in the power supply system, the mth load module comprises a second type UPS, the output of the second type UPS forms a common backup bus and is connected to any UPS static bypass of the rest load modules in a series cold backup mode

Unlike the first type of UPS, however, both the main and static bypass inputs of the first type of UPS are connected to the supply bus without UPS protection. Therefore, when a main circuit of a certain UPS in the load module is in fault and the mains supply is abnormal, the UPS of the second type can be uninterruptedly switched to the static bypass power supply after the battery discharge is finished, the power of the static bypass is from the public bus of the output of the upper UPS, and the static bypass power supply is protected by the upstream UPS. Therefore, the introduction of the second UPS enables the power supply system to be more stable, and the uninterrupted power supply is further improved.

Fig. 5 is a schematic diagram of a power supply system including a second type UPS.

Fig. 6 provides an internal connection configuration for the second type of UPS, which is connected in a series backup manner by two UPSs, i.e., the output of an upstream UPS forms a common backup bus and then is connected to the static bypass input of another UPS.

In some embodiments, the output end of the power supply module is connected with a third type UPS;

the output end of the third type UPS is connected to one power supply bus.

The third type of UPS is the same as the first and second types of UPS, but the third type of UPS is connected to the rear end of the power supply module and located in front of the load module.

Therefore, N-1 power supply branches of one power supply module share one third type UPS, the number of the UPSs and the hardware cost of the UPS system are reduced, and meanwhile, due to the introduction of the third type UPS, the continuity of power supply is ensured.

Fig. 7 is a schematic diagram of a power supply system including a third type of UPS.

In some embodiments, a static switch STS is disposed on each of the power supply branches;

two input ends of the static transfer switch STS are respectively connected with the two power supply buses;

and the output end of the static selector switch STS is respectively connected with the two paths of loads of the same load module.

The STS is an electronic transfer switch that automatically reverses the input when one input fails.

In some embodiments, each of the power supply branches is provided with an automatic transfer switch ATS and a high-voltage direct-current power supply device connected in series with the automatic transfer switch ATS;

the two input ends of the automatic transfer switch ATS are respectively connected with the two power supply buses; the output end of the automatic transfer switch ATS is connected with the high-voltage direct-current power supply equipment; and the output end of the high-voltage direct-current power supply equipment is connected with the two paths of loads.

The high-voltage direct-current power supply device is a rectifying device capable of converting alternating current into direct current, the output direct-current voltage value can be 100-380V, and the specific direct-current voltage value can be determined according to the acceptable input voltage range of the load.

Therefore, the high-voltage direct-current power supply equipment is adopted to replace an alternating-current UPS, and the load application scene needing high-voltage direct-current power supply is met.

In some embodiments, the power supply module comprises: an automatic transfer switch ATS and a generator;

the automatic transfer switch ATS comprises two input ends and an output end;

one input end of the automatic change-over switch is used for being connected with a mains supply system, and the other input end of the automatic change-over switch is connected with the generator; the input end connected with the commercial power supply system is used for inputting commercial power; and the input end is connected with the generator and is used for inputting the power supply of the generator. When the mains supply is normal, the mains supply can supply power, and when the mains supply is abnormal, the generator generates power to maintain the continuous power supply of the power supply module.

And the output end of the automatic transfer switch ATS is connected to one power supply bus through the UPS or is directly connected to one power supply bus.

The output end of the power supply module can be directly connected with the power supply bus or connected into the power supply bus through the UPS.

In some embodiments, the load comprises: an IT load and/or a dual power supply load.

In some embodiments, each of the power supply branches is further provided with a power distribution assembly;

the power distribution assembly is used for providing power distribution for two paths of power supply loads connected with the power supply branch.

The distribution subassembly can include the switch board, and this switch board can carry out power distribution, and the output of supplying power is carried out according to the required power supply of load, promotes power supply efficiency.

In some embodiments, each of the power supply branches includes a main input terminal and a standby input terminal, and the standby input terminals of different power supply branches in the same load module are connected to different power supply buses; and the main input ends of different power supply branches in one load module are connected with the same power supply bus. Therefore, the standby input ends of the power supply branches in the same load module are connected to other different power supply buses, namely, when the main input circuit fails, the other standby power supply buses are connected for supplying power, and at the moment, the main input ends of the power supply branches in the same load module are connected to the same power supply module. Under the condition of main circuit failure, the standby circuits of the power supply branches of the load modules are connected to different buses, and the condition that more than two circuits of abnormal circuits occur simultaneously on different buses is extremely low, so that the phenomenon of power supply interruption of a single load module is reduced.

In other embodiments, each of the power supply branches includes a main input terminal and a standby input terminal, and the main input terminals of different power supply branches in the same load module are connected to different power supply buses; and the standby input ends of different power supply branches in one load module are connected with the same power supply bus. At the moment, the main input ends of the power supply branches of one load module are connected to different power supply modules, so that when one power supply module is abnormal, the phenomenon that the power supply of the main input ends is interrupted in the corresponding load module in the whole power supply system is avoided.

The specific connection mode of the main input end and the standby input end of each power supply branch in the power supply system is set according to an application scenario, and is not limited here.

When the power supply of the main input end is normal, the standby input end is in a non-power supply state, no line loss exists on a power supply line, and unnecessary power supply expense is reduced.

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

example 1:

compared with a Distributed Redundant (DR) power supply system, the Distributed Redundant (DR) power supply system is combined with a public backup (Reserve Redundant) power supply system, so that each power supply loop of the load has a double-path power supply redundancy characteristic, and the reliability of power supply is improved.

Compared with a common backup redundancy design, the single common redundancy power supply module is not provided, and each power supply module has common redundancy, so that equipment of each power supply module is loaded, and the efficiency of equipment such as a key power supply, a cable and a transformer is higher.

The backup power supply loops of all distributed redundant DR power supply modules are all from different power supply modules by supplying power through the distributed common backup buses, so that the backup reliability is improved.

As shown in fig. 4, the distributed redundancy ratio is 3N/2, that is, 3 UPS form a pairwise crossing distribution to supply power to IT loads, and the redundant power of the power supply module forms a common backup bus to supply power to any UPS bypass of the other power supply modules. Therefore, the bypass power supply of each UPS in the power supply module is realized by other public backup buses, so that in the embodiment of the application, if N power supply modules exist, N public backup buses exist, and the fault rate is low compared with that of a single public backup bus.

TABLE 1

If compared to distributed redundancy (fig. 1), it can be seen that there are two switchable loop options upstream of each supply loop of the load, and that the loop of the backup option is different.

When the power supply system is used, the configuration of the capacity and the number of the equipment has the following characteristics:

if there are N sets of power supply modules, there are 4 sets of power supply modules as shown in fig. 4. Each power supply module is composed of a transformer, a generator and an ATS. The generator can be a low-voltage generator, a medium-voltage generator or other various types of generators capable of generating electricity.

N-1 independent single UPS are arranged under each set of power supply module to form the framework of the DR power supply system, and meanwhile, redundant power can form a common backup bus of other power supply buses.

And the static bypass of the UPS under each set of power supply module is respectively connected to the public backup buses of the rest N-1 power supply modules.

Compared with a DR power supply system, the power supply system has the characteristic that each power supply loop of the load has double-path power supply redundancy by combining a common backup mode.

And the distributed public backup buses are used for supplying power, so that backup power supply loops of each distributed redundant DR power supply module are from different power supplies.

Example 2:

under each set of ATS, the commercial power and the power supply module consisting of the generator, a plurality of sets of UPS form a Distributed Redundant mode (3N/2 as shown in figure 5), wherein one set of UPS forms a common backup bus to supply power to the UPS of the other power supply modules.

The power supply structure of the power supply system has the following characteristics:

if there are N sets of power supply modules, there are 4 sets of modules (transformer, low voltage generator, ATS) as shown in fig. 5.

N independent single-machine UPSs are configured below each set of power supply module, wherein N-1 UPSs form a distributed redundant DR framework, and the rest is used as a common backup UPS and outputs a common backup bus; this may increase the reliability of the common backup.

And the UPS bypass under each set of power supply module is respectively connected to the public backup buses of the rest N-1 power supply modules to form a serial cold backup mode.

The power supply system shown in fig. 5 can improve the reliability of the UPS bypass power supply compared to the DR power supply system.

Example 3:

The structure of the power supply system has the following characteristics:

if there are N sets of power supply modules, the power supply system shown in fig. 7 has 4 sets of modules. The power supply module comprises a transformer, a low voltage generator and an ATS.

1 UPS is arranged under each set of power supply module, and the UPS can be a large single UPS or a modular UPS. One UPS can output N-1 STSs to form a distributed redundant DR framework, and the rest UPS power can be used as a common backup bus of other power supply buses and respectively connected to the common backup buses of the rest N-1 power supply modules.

The power supply system provided by the example uses a large UPS, and the UPS and the power supply module are in a one-to-one relationship, so that the power supply stability can be further improved due to the addition of the STS.

Example 4:

in some application scenarios of IT loads requiring a dc input, a High Voltage Direct Current (HVDC) device is used instead of an ac UPS, and the HVDC device does not have a static bypass of the UPS and is not suitable for an ac STS. Under each power supply module, a plurality of sets of high-voltage direct current HVDC equipment form distributed redundancy, for example, the redundancy ratio of fig. 8 is 3N/2, and redundant electric power forms a common backup bus to supply power to the HVDC equipment of the other power supply modules.

As shown in fig. 8, the structure of the power supply system has the following features:

if there are N sets of power supply modules, there are 4 sets of power supply modules as in fig. 8, this power supply module includes: transformer, low voltage generator and ATS.

And N-1 independent high-voltage direct current HVDC and input ATS are arranged below each set of power supply module, wherein the N-1 sets form a distributed redundant DR framework (direct current power supply), and redundant power forms a common backup bus (alternating current power supply).

And an ATS input of each set of HVDC equipment, a main circuit is connected to the corresponding power supply module, and a backup circuit is connected to other public backup buses.

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.