CN217956765U

CN217956765U - Power supply system

Info

Publication number: CN217956765U
Application number: CN202220751392.5U
Authority: CN
Inventors: 张敏翔; 张春涛; 李勇
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-12-02
Anticipated expiration: 2032-04-02
Also published as: DE202023101432U1

Abstract

The application provides a power supply system, and relates to the technical field of power distribution. The UPS power supply system comprises an incoming line switch circuit and at least one uninterruptible power supply unit, two isolating switches and two fuses are additionally arranged in the UPS unit, the input end of each UPS unit is electrically connected with a power distribution system through the fuses and the isolating switches, and the output end of each UPS unit is electrically connected with a load through the fuses and the isolating switches. When the UPS unit is abnormal, the mode of fusing the fuse in the fuse and disconnecting the isolating switch is adopted, so that the UPS unit is electrically disconnected with the power distribution system, and the normal work of the power distribution system is prevented from being influenced by the UPS unit. The isolating switch and the fuse are added into the UPS unit to replace a UPS input circuit breaker and a UPS output circuit breaker, so that the number of parts of the power distribution system can be reduced, the complexity of the power distribution system is favorably reduced, a large number of parts are reduced, and the density of the power distribution system is favorably improved.

Description

Power supply system

Technical Field

The utility model relates to a distribution technical field especially relates to a power supply system.

Background

In an existing Uninterruptible Power Supply (UPS) power supply system, a transformer, an incoming line breaker, a wayside breaker, a UPS input breaker, a UPS output breaker, and other components generally constitute the UPS power supply system. Because the number of the parts of the UPS power supply system is large, and the parts are connected together through connecting parts such as cables, copper wires and the like, the UPS power supply system is complex and is not beneficial to subsequent maintenance and management.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, embodiments of the present application provide a power supply system, in which a UPS unit is added with a disconnecting switch and a fuse, instead of a UPS input breaker and a UPS output breaker, so that the number of components of a UPS power distribution system can be reduced, which is beneficial to reducing the complexity of the UPS power distribution system, and a large number of components are reduced, which is beneficial to increasing the density of the UPS power distribution system.

Therefore, the following technical scheme is adopted in the embodiment of the application:

in a first aspect, the present application provides a power supply system comprising: the incoming line switch circuit is used for controlling whether the external power supply supplies power to at least one load; every uninterrupted power source unit of at least one uninterrupted power source unit all includes two isolator, two at least fuses and at least one uninterrupted power source, at least one uninterrupted power source's input through at least one fuse and an isolator with the inlet wire switch circuit electricity is connected, at least one uninterrupted power source's output through at least one fuse and an isolator with at least one load electricity is connected.

In this embodiment, two disconnectors and two fuses are added to the UPS unit, the input of each UPS is electrically connected to the UPS power distribution system through at least one fuse and one disconnector, and the output of each UPS is electrically connected to at least one load through at least one fuse and one disconnector. When the UPS in the UPS unit is abnormal or the subjective intention of a user occurs, the electric connection between the UPS unit and the UPS power distribution system is disconnected in a mode of fusing off a fuse in a fuse and disconnecting a disconnecting switch, and the UPS unit 240 is prevented from influencing the normal work of the UPS power distribution system. Two isolating switches and two fuses are added in the UPS unit, and the UPS unit can replace a UPS input circuit breaker and a UPS output circuit breaker in the prior art. Therefore, the UPS power distribution system can eliminate the UPS input breaker and the UPS output breaker, thereby reducing the number of parts of the UPS power distribution system, being beneficial to reducing the complexity of the UPS power distribution system, reducing a large number of parts and being beneficial to improving the density of the UPS power distribution system.

In one embodiment, an input terminal of each uninterruptible power supply is electrically connected with one end of a first fuse, and the other end of the first fuse is electrically connected with a first isolating switch; every uninterrupted power source's output is connected with the one end electricity of second fuse, the other end and the second isolator electricity of second fuse are connected, two isolator include first isolator with second isolator, at least two fuses include first fuse with the second fuse.

In this embodiment, one fuse is electrically connected at the input and output of each UPS. When a single UPS in one UPS unit is abnormal, the abnormal UPS is only required to be electrically disconnected with the UPS distribution system, and other UPSs are still electrically connected with the UPS distribution system, so that the phenomenon that the abnormal UPS causes the electrical disconnection between all UPSs in the whole UPS unit and the UPS distribution system is avoided, and the reliability of the UPS distribution system is improved.

In one embodiment, the input terminal of each of the at least one ups unit is electrically connected to the incoming line switch circuit, and the output terminal of each of the at least one ups unit is electrically connected to the load respectively

In the embodiment, the output end of each UPS unit is electrically connected with at least one load, so that the influence on the normal power supply of all the loads when one UPS unit is abnormal is avoided.

Meanwhile, loads of the same rated voltage can be electrically connected to the output terminal of one UPS unit. Different UPS units can output electric signals of different rated voltages to supply power for loads of different rated voltages, the UPS power distribution system can supply power for the loads of different rated voltages, and the practicability of the UPS power distribution system is improved.

In one embodiment, the method further comprises: and one end of the other side-maintenance switch circuit is electrically connected to the incoming line switch circuit, the other end of the other side-maintenance switch circuit is electrically connected to the at least one load, and the other side-maintenance switch circuit is used for enabling the external power supply to supply power for the at least one load when the at least one uninterruptible power supply unit cannot supply power for the at least one load.

In this embodiment, a wiki switch circuit is added between the inlet switch circuit and the plurality of UPS units. When the internal components of the UPS unit are damaged, the electric energy quality of the commercial power system or the standby power supply is normal and the like, a user can close a breaker in the bypass switch circuit to enable the commercial power system or the standby power supply to directly supply power for each load, and therefore the stability of the UPS power distribution system is improved.

In one embodiment, the dimension-side switch circuit comprises at least one first breaker, one end of each first breaker is electrically connected with the incoming line switch circuit, and the other end of each first breaker is electrically connected with a load electrically connected to the output end of one uninterruptible power supply unit.

In this embodiment, the wiki switching circuit includes a plurality of circuit breakers, one end of each circuit breaker is electrically connected to the incoming switching circuit, and the other end of each circuit breaker is electrically connected to a load electrically connected to the output of one of the modules, respectively. When a UPS unit is abnormal, the UPS unit can not supply power to a load connected with the UPS unit, the corresponding breaker of the bypass switch circuit can be controlled to be closed, a mains supply system or a standby power supply can supply power to the load electrically connected with the UPS unit, the load is guaranteed not to be powered off, and the reliability of the UPS power distribution system is improved.

In one embodiment, the method further comprises: at least one switching circuit respectively disposed in the at least one uninterruptible power supply unit; wherein, switching circuit's one end connect one isolator with between the inlet wire switching circuit, the other end connect another isolator with between at least one load, be used for the uninterrupted power source unit that switching circuit located can not do when at least one load supplies power, let external power supply do at least one load supplies power.

In the embodiment, a switch circuit is added to each UPS unit to replace the function of the bypass switch circuit, so as to further reduce the number of components of the UPS power distribution system, thereby reducing the complexity of the UPS power distribution system, reducing the floor area of the UPS power distribution system, and increasing the density of the UPS power distribution system.

In one embodiment, the method further comprises: and the transformer circuit is electrically connected on the incoming line switch circuit and used for converting the electric signal input by the external power supply into an electric signal with set voltage.

In this embodiment, a transformer circuit is electrically connected to the front end of the incoming line switch circuit, i.e. the end electrically connected to the external power supply, to convert the high-voltage electrical signal in the utility power system into an electrical signal with a set voltage, so as to provide an electrical signal with a rated voltage for each load.

In one embodiment, the method further comprises: the incoming line switching circuit is electrically connected with the input end of the at least one uninterrupted power supply unit through the input bus; the output ends of the near-maintenance switch circuit and the uninterrupted power supply unit are electrically connected with the at least one load through the at least one output bus bar.

In this embodiment, by adding the bus bar in the UPS power distribution system, the number of connections between components can be reduced, and the complexity of the UPS power distribution system can be reduced.

In an embodiment, the service entrance switch circuit includes second circuit breaker and third circuit breaker, the one end and the transformer circuit electricity of first circuit breaker are connected, the one end and the stand-by power supply electricity of second circuit breaker are connected, the other end of first circuit breaker with the other end of second circuit breaker all with dimension other switch circuit and/or at least one uninterrupted power source unit electricity is connected.

Drawings

The drawings that accompany the detailed description can be briefly described as follows.

FIG. 1 is a schematic circuit diagram of a UPS power distribution system according to the prior art;

fig. 2 is a schematic diagram of an architecture of a UPS power distribution system provided in an embodiment of the present application;

fig. 3 is a schematic circuit diagram of a first UPS power distribution system provided in an embodiment of the present application;

fig. 4 is a schematic circuit diagram of a second UPS power distribution system provided in an embodiment of the present application;

FIG. 5 is a schematic circuit diagram of a third UPS power distribution system provided in an embodiment of the present application;

FIG. 6 is a schematic circuit diagram of a fourth UPS power distribution system provided in an embodiment of the present application;

fig. 7 is a schematic circuit diagram of a fifth UPS power distribution system provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The term "and/or" herein is an association relationship describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The symbol "/" herein denotes a relationship in which the associated object is or, for example, a/B denotes a or B.

The terms "first" and "second," and the like, in the description and in the claims herein are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first response message and the second response message, etc. are for distinguishing different response messages, not for describing a specific order of the response messages.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present application, unless otherwise specified, "a plurality" means two or more, for example, a plurality of processing units means two or more processing units, or the like; plural elements means two or more elements, and the like.

Fig. 1 is a schematic diagram of a UPS power distribution system in the prior art. As shown in FIG. 1, the UPS power distribution system 100 includes a transformer 110, an incoming breaker 120, a bypass breaker 130, UPS input breakers (140-1, 140-2), UPSs (150-1, 150-2), and UPS output breakers (160-1, 160-2).

The transformer 110 changes the voltage of the input electrical signal by using the principle of electromagnetic induction, and converts the voltage of the input electrical signal into a set voltage, for example, 6-35 kV voltage into 380/400/415/480V. The electrical signal output from the transformer 100 passes through the incoming breaker 120 and the UPS input breaker 140 in sequence, and then is input to the UPS 150. The UPS 150 converts the electrical signal into a stable and reliable electrical signal after receiving the electrical signal, and inputs the stable and reliable electrical signal to the load through the UPS output breaker, so as to provide the stable and reliable electrical signal for each load. When the UPS 150 is abnormal, the UPS input breaker 140 and the UPS output breaker 160 are opened, the bypass breaker 130 is closed, and the external power source directly supplies power to the loads.

In the existing UPS power distribution system, the UPS input circuit breaker and the UPS output circuit breaker are independently arranged, and each UPS is provided with one UPS input circuit breaker and one UPS output circuit breaker, so that a large number of independent parts exist in the UPS power distribution system, a large amount of space between power supply and distribution rooms can be occupied, and the connection among the parts can make the UPS power supply system more complex, which is not beneficial to subsequent maintenance and management. The number of UPS power supply systems is seemingly reduced, as well as the complexity of the UPS power supply system, if the UPS input breaker at the UPS input and the UPS output breaker at the output are simply eliminated. However, the two ends of the UPS lack the management and control of the circuit breaker, and if the UPS unit is abnormal, the UPS unit cannot be electrically disconnected from the UPS power supply system, so that the normal operation of the UPS power supply system can be affected, the reliability and maintainability of the UPS power supply system are reduced, the performance of the UPS power supply system is reduced, and the product popularization is not facilitated.

In order to solve the problems of the conventional UPS power distribution system, the embodiment of the present application provides a UPS power distribution system, as shown in fig. 2, the UPS power distribution system 200 includes a transformer circuit 210, an incoming line switch circuit 220, a wiki switch circuit 230, and at least one UPS unit (240-1, \8230; 240-N). In the application, a disconnecting switch and a fuse are added in the UPS unit to replace a UPS input circuit breaker and a UPS output circuit breaker.

If the UPS has abnormal conditions such as internal component damage, the disconnecting switch may be disconnected or the fuse may be blown, so that the UPS unit 240 is disconnected from other circuits, and then the external power supply directly supplies power to each load. This application adds isolator and fuse in the UPS unit, replaces UPS input circuit breaker and UPS output circuit breaker, can reduce UPS distribution system's part quantity, is favorable to reducing UPS distribution system's complexity to and reduced a large amount of parts, be favorable to promoting UPS distribution system's density.

The solution claimed by the present application is described in detail below by means of four embodiments shown in figures 3-7.

Fig. 3 is a schematic circuit diagram of a first UPS power distribution system provided in an embodiment of the present application. The UPS power distribution system 200 shown in fig. 3 includes a transformer circuit 210, an inlet switch circuit 220, a dimensional bypass switch circuit 230, and a plurality of UPS units 240. The transformer circuit 210, the incoming line switch circuit 220, the dimension side switch circuit 230 and the input busbar 250 are electrically connected in sequence. The input terminal of each UPS unit 240 is electrically connected to the input busbar 250, and the output terminal of each UPS unit 240 is electrically connected to the output busbar 260. The output bus bar 260 is electrically connected to each load. The UPS distribution system 200 is generally configured on a utility power system, and converts electric energy on the utility power system into an electric signal with a set requirement, and then inputs the electric signal into each load to supply power to the load with a relatively high requirement. Of course, the UPS power distribution system 200 may also be configured in a solar power generation system, a wind power generation system, and the like, and the application is not limited thereto.

The transformer circuit 210 includes a transformer for converting a high-voltage electrical signal in a utility power system into an electrical signal of a set voltage to provide an electrical signal of a rated voltage for each load. Generally, the voltage of the electrical signal output by the utility power system is generally hundreds of volts, thousands of volts, or even hundreds of thousands of volts, and the rated voltage of the load is generally other rated voltages such as 220V, 110V, etc. In order to supply power to each load by the utility power system, a transformer circuit 210 is disposed on the utility power system side to convert the electrical signal inputted by the utility power system into an electrical signal with a predetermined voltage. Alternatively, if the voltage of the electrical signal input by the utility power system is equal to the rated voltage of each load, the transformer circuit 210 may be omitted from the UPS power distribution system 200, so as to further reduce the number of components of the UPS power distribution system, thereby facilitating the complexity reduction and the density increase of the UPS power distribution system.

The incoming line switch circuit 220 includes a switch circuit therein for controlling whether the utility power system supplies power to each load. Preferably, the switching circuit is a circuit breaker, and the circuit breaker refers to a mechanical switching apparatus capable of switching on, carrying and breaking current under normal circuit conditions, and also capable of switching on, carrying and breaking current for a certain time under specified abnormal conditions (such as short circuit conditions). Because the circuit breaker has advantages such as short circuit prevention, overcurrent protection, arc extinguishing, the circuit breaker is selected for use as switch circuit in this application, improves UPS distribution system 200's security. Of course, the switch circuit may also be selected from other types of switch devices, such as a knife switch, an electromagnetic control switch, etc., and the application is not limited herein.

In order to ensure the power stability of the load, the UPS power distribution system 200 also needs to be electrically connected to other backup power sources. The backup power source can be a solar power generation system, an oil engine power generation device, an energy storage power source and the like. When the power supply of the utility power system is interrupted or abnormal, the UPS power distribution system 200 can switch to the backup power supply to supply power to each load. Illustratively, as shown in fig. 3, the incoming switching circuit 220 includes a breaker 221 and a breaker 222. The breaker 221 is connected to the utility system side, and the breaker 222 is connected to the backup power side. If the mains system is normally powered, the breaker 221 is closed and the breaker 222 is opened, so that the mains system supplies power to each load. If the mains system is abnormal, the breaker 221 is opened, and the breaker 222 is closed, so that the standby power supply supplies power to each load.

If the load does not have high requirements for the stability of power supply, the UPS power distribution system 200 may not need to be electrically connected to other backup power sources, and may not need to additionally add accessories electrically connected to the backup power sources, thereby further reducing the number of components of the UPS power distribution system, facilitating the reduction of the complexity of the UPS power distribution system, and increasing the density of the UPS power distribution system.

The bypass switch circuit 230 is configured to switch the utility power system or the standby power supply to the input bus 260 when the UPS unit 240 is abnormal, so that the utility power system or the standby power supply directly supplies power to each load. Illustratively, the switch circuit in the wiener switch circuit 230 is preferably a circuit breaker, and may also be a disconnector. In the case of a circuit breaker, the circuit breaker is electrically connected between the incoming switching circuit 220 and the input busbar 260. When the internal components of the UPS unit 240 are damaged, the power quality of the utility power system or the backup power supply is normal, and the like, the user may close the circuit breaker in the bypass switch circuit 230, so that the utility power system or the backup power supply directly supplies power to each load.

The UPS unit 240 includes two disconnectors 241, two fuses 242, and at least one UPS 243. The UPSs are connected in parallel, the input end of each UPS 243 is electrically connected with the input busbar 250 through a fuse 242 and an isolation switch 241, and the output end of each UPS 243 is electrically connected with the output busbar 260 through a fuse 242 and an isolation switch 241. Preferably, the isolating switch 241 is not limited to an isolating switch known in the art, but may also refer to a fuse combiner and a device having a switching function, and the application is not limited thereto.

A UPS is a device capable of continuously supplying power to a load, and mainly includes: a rectifier, an inverter and a battery. When the power input is normal, the power input supplies power to the load through the rectifier and the inverter, and charges the battery through the rectifier, and the UPS can output stable voltage; when the input of the commercial power system fails, the battery supplies the electric energy stored by the battery to the load through the inverter. Optionally, the stable voltage refers to a voltage with a fluctuation smaller than a set threshold, and the size of the set threshold is related to an application scenario of the power supply system and also related to a requirement of the load, and the present application is not limited herein.

If the UPS 243 in the UPS unit 240 has an output short circuit or the like, the current passing through the fuse 242 is relatively large. If the current flowing through the fuse 242 exceeds a predetermined threshold, a large amount of heat is generated to blow the fuse 242 to open the fuse. After the fuses 242 at the input end and the fuses 242 at the output end of each UPS 243 are disconnected, the UPS unit 240 is electrically disconnected from the UPS power distribution system 200, so as to prevent the UPS unit 240 from affecting the normal operation of the UPS power distribution system 200. If the UPS 243 in the UPS unit 240 is damaged or the user's subjective intention is met, the input isolation switch 241 and the output isolation switch 241 of each UPS 243 may be disconnected to disconnect the UPS unit 240 from the UPS power distribution system 200, and the UPS power distribution system 200 may provide power to each load in other manners.

The UPS units 240 are electrically connected in parallel, that is, an input of each UPS unit 240 is electrically connected to the input busbar 250, and an output of each UPS unit 240 is electrically connected to the output busbar 260. If one or more of the UPS units 240 is electrically disconnected from the UPS power distribution system 200, other UPS units 240 may also provide power to various loads to ensure stability of the UPS power distribution system 200.

In the embodiment of the application, two isolating switches and two fuses are added in the UPS unit, the input end of each UPS is electrically connected with the UPS distribution system through one fuse and one isolating switch, and the output end of each UPS is electrically connected with the UPS distribution system through one fuse and one isolating switch. When the UPS in the UPS unit is abnormal or the subjective intention of a user occurs, the electric connection between the UPS unit and the UPS power distribution system is disconnected in a mode of fusing off a fuse in a fuse and disconnecting a disconnecting switch, and the UPS unit 240 is prevented from influencing the normal work of the UPS power distribution system. Two isolating switches and two fuses are added in the UPS unit, and the UPS unit can replace a UPS input circuit breaker and a UPS output circuit breaker in the prior art. Therefore, the UPS power distribution system can eliminate the UPS input breaker and the UPS output breaker, thereby reducing the number of parts of the UPS power distribution system, being beneficial to reducing the complexity of the UPS power distribution system, reducing a large number of parts and being beneficial to improving the density of the UPS power distribution system.

Fig. 4 is a circuit schematic diagram of a second UPS power distribution system provided in an embodiment of the present application. The UPS power distribution system 400 shown in fig. 4 includes a transformer circuit 410, an inlet switch circuit 420, a dimensional bypass switch circuit 430, and a plurality of UPS units 440. The transformer circuit 410, the incoming line switch circuit 420, the dimension side switch circuit 430 and the input bus bar 450 are electrically connected in sequence. The input of each UPS unit 440 is electrically connected to the input bus bar 450, and the output of each UPS unit 440 is electrically connected to the output bus bar 460. The output bus bar 460 is electrically connected to each load.

This embodiment is improved over the UPS power distribution system 200 shown in fig. 3 in that the UPS units 440. The UPS unit 440 includes two isolation switches and at least one UPS 443, with two fuses 442 included in each UPS 443. In each UPS 443, two fuses 442 are respectively connected to two outputs of an energy storage device, or to an input and an output of an alternating-current (AC-AC) converter, or to two ends of other devices such as a rectifier, an inverter, and the like. The UPSs 443 are connected in parallel, the input end of each UPS 443 is electrically connected with the input bus bar 450 through an isolation switch 441, and the output end of each UPS 443 is electrically connected with the output bus bar 460 through an isolation switch 441.

When an output short circuit or the like occurs in any one of the UPSs 443 (denoted as "UPS 443-m") in one of the UPS units 440 (denoted as "UPS units 440-n"), the current through the fuse 442 in that UPS 443-m is relatively large. If the current flowing through the fuse 442 of the UPS 443-m exceeds a predetermined threshold, a large amount of heat may be generated to blow the fuse and thus to open the fuse 442 of the UPS 443-m. After the fuses 242 at the input and output of the UPS 443-m are disconnected, the UPS 443-m is electrically disconnected from the UPS distribution system 400, thereby preventing the UPS 443-m from affecting the normal operation of the UPS distribution system 400. If no abnormality occurs in any of the other UPSs 443 of the UPS units 440-n, the other UPSs 443 of the UPS units 440-n remain electrically connected to the UPS power distribution system 400.

In this embodiment, one fuse 442 is electrically connected at the input and output of each UPS 443. When a single UPS 443 in one UPS unit 440 is abnormal, only the UPS 443 with the abnormality needs to be electrically disconnected from the UPS power distribution system 400, and the other UPSs 443 are still electrically connected to the UPS power distribution system 400, so as to avoid that all the UPSs 443 in the entire UPS unit 440 are electrically disconnected from the UPS power distribution system 400 due to the abnormality of one UPS 443, thereby improving the reliability of the UPS power distribution system 400.

Fig. 5 is a schematic circuit diagram of a third UPS power distribution system provided in an embodiment of the present application. The UPS power distribution system 500 shown in fig. 5 includes a transformer circuit 510, an inlet switch circuit 520, and a plurality of UPS units 540. The transformer circuit 510, the incoming line switch circuit 520 and the input busbar 550 are electrically connected in sequence. The input terminal of each UPS unit 540 is electrically connected to the input busbar 550, and the output terminal of each UPS unit 540 is electrically connected to the output busbar 560. The output bus bar 560 is electrically connected to each load.

This embodiment improves upon the UPS power distribution system 400 of fig. 4 by reducing a dimension bypass switch circuit and adding a switch circuit 544 to each UPS unit 540. The incoming switch circuit 520 has two circuit breakers, one end of one circuit breaker is electrically connected to the transformer, one end of one circuit breaker is electrically connected to the standby power supply, and the other ends of the two circuit breakers are electrically connected to the input busbar 550. In the UPS unit 540, one end of the switch circuit 544 is electrically connected to an end of one of the isolation switches 541 close to the input bus bar 550, and the other end of the switch circuit 544 is electrically connected to an end of another isolation switch 541 close to the output bus bar 560.

In this embodiment, the elimination of a separate component, a bypass switch circuit, and the addition of a switch circuit 544 to each UPS unit 540, corresponds to the movement of a bypass switch circuit into each UPS unit 540. When the UPS 543 in the UPS unit 540 is abnormal, the UPS 543 and the UPS distribution system 500 are electrically disconnected, and the switch circuit 544 may be closed, so that the input busbar 550 is electrically connected to the output busbar 560, and the utility power system or the standby power supply directly supplies power to each load.

In this embodiment, a switch circuit 544 is added to each UPS unit 540 to replace the function of the bypass switch circuit, thereby further reducing the number of components of the UPS power distribution system 500, which is beneficial to reduce the complexity of the UPS power distribution system, and to reduce the floor space of the UPS power distribution system, thereby increasing the density of the UPS power distribution system.

Alternatively, the UPS power distribution system 500 may eliminate the addition of the switching circuit 544 to each UPS unit 540 after a one-dimensional bypass switching circuit reduction. As shown in fig. 5, in a UPS unit 540, if one or more UPSs 543 in the UPS unit 540 are abnormal, the UPS unit 540 may be electrically connected to the UPS power distribution system 500. If one or more of the UPS units 540 in the UPS power distribution system 500 is abnormal, there are other UPS units 540 electrically connected to the UPS power distribution system 500. The chances of all UPS units 540 being electrically disconnected from the UPS power distribution system 500 are very small, so the switch circuit 544 may not be added to each UPS unit 540, or the switch circuit 544 may be added to one UPS unit 540.

Fig. 6 is a schematic circuit diagram of a fourth UPS power distribution system provided in an embodiment of the present application. The UPS power distribution system 600 shown in fig. 6 includes a transformer circuit 610, an inlet switch circuit 620, and a plurality of UPS units 640. The transformer circuit 610, the incoming line switch circuit 620 and the input busbar 650 are electrically connected in sequence. The input terminal of each UPS unit 640 is electrically connected to the input bus bar 650, and the output terminal of each UPS unit 640 is electrically connected to one output bus bar 660. Each output busbar 660 is electrically connected to at least one load.

Compared to the UPS power distribution system 500 shown in fig. 5, this embodiment is improved by adding N-1 output busbars 660, N being a positive integer greater than 1. In this embodiment, the output end of each UPS unit 640 is electrically connected to an output bus bar 660, and each output bus bar 660 is electrically connected to at least one load, so as to prevent the influence on the normal power supply of all the loads when one UPS unit 640 is abnormal.

Meanwhile, loads with the same rated voltage can be electrically connected to one output busbar 660. Different UPS units 640 can output electric signals with different or the same rated voltage, and then power is supplied to loads with different rated voltages through different output busbars 660, so that the UPS power distribution system 600 can supply power to the loads with different rated voltages, and the practicability of the UPS power distribution system 600 is improved.

Fig. 7 is a schematic circuit diagram of a fifth UPS power distribution system provided in an embodiment of the present application. The UPS power distribution system 700 shown in fig. 7 includes a transformer circuit 710, an inlet switch circuit 720, a dimensional bypass switch circuit 730, and a plurality of UPS units 740. The transformer circuit 710, the incoming line switch circuit 720, the dimension side switch circuit 730 and the input bus bar 750 are electrically connected in sequence. The input terminal of each UPS unit 740 is electrically connected to the input bus bar 750, and the output terminal of each UPS unit 740 is electrically connected to one output bus bar 760. Each output busbar 760 is electrically connected to at least one load.

In comparison to the UPS power distribution system 600 of fig. 6, this embodiment improves by removing the wayside switch circuits 730 from the UPS units 740, i.e., by adding a wayside switch circuit 730 to the UPS units 740, eliminating the switch circuits in each UPS unit 740. In this embodiment, the dimension-side switch circuit 730 includes N breakers or other switches, one end of each breaker is electrically connected to the input bus bar 750, and the other end of each breaker is electrically connected to one output bus bar 760. The UPS power distribution system 700 can provide power to loads of different voltage ratings, improving the utility of the UPS power distribution system 700.

Meanwhile, when one UPS unit 740 is abnormal, the output bus 760 electrically connected to the UPS unit 740 interrupts power supply, and the switch of the bypass switch circuit 730 can be controlled to be closed, so that the output bus 760 electrically connected to the UPS unit 740 is electrically connected to the utility power system or the standby power supply to ensure that a single UPS unit 740 fails, the bypass switch circuit 730 can be operated externally to continue power supply for the load on the output bus 760, thereby improving the reliability of the UPS distribution system 400.

Embodiments of the present application provide a power distribution system, which may be the UPS power distribution system described in fig. 2 to fig. 7 and the corresponding protection schemes described above, or may be other power distribution systems, and the present application is not limited herein. The technical solutions of the UPS power distribution system described in fig. 2 to 7 and the corresponding protection solutions described above, which are implemented under the principles of the present application, are within the protection scope of the present solution.

The positions, the number, the connection mode and the like of the disconnecting switch and the fuse in the UPS distribution system are not limited to the embodiments, and technical schemes realized under the principle of the application are within the protection range of the scheme. Any one or more of the embodiments or illustrations in the specification are intended to be combined in any suitable manner within the scope of the present disclosure.

Finally, the above embodiments are merely used to illustrate the technical solutions of the present application. It will be understood by those skilled in the art that although the present application has been described in detail with reference to the foregoing embodiments, various changes in the embodiments described above may be made and equivalents may be substituted for elements thereof. Such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A power supply system, comprising:

the incoming line switch circuit is used for controlling an external power supply to supply power to at least one load;

at least one uninterrupted power source unit, every uninterrupted power source unit all include two isolator, two at least fuses and at least one uninterrupted power source, at least one uninterrupted power source's input through at least one fuse and an isolator with the inlet wire switch circuit electricity is connected, at least one uninterrupted power source's output through at least one fuse and an isolator with at least one load electricity is connected.

2. The power supply system of claim 1, wherein the input of each uninterruptible power supply is electrically connected to one end of a first fuse, the other end of the first fuse being electrically connected to a first isolation switch; every uninterrupted power source's output is connected with the one end electricity of second fuse, the other end and the second isolator electricity of second fuse are connected, two isolator include first isolator with second isolator, at least two fuses include first fuse with the second fuse.

3. The power supply system of claim 1, wherein an input of each of the at least one ups unit is electrically connected to the incoming switching circuit, and an output of each of the at least one ups unit is electrically connected to a load.

4. The power supply system according to any one of claims 1 to 3, further comprising:

and one end of the other side-maintenance switch circuit is electrically connected to the incoming line switch circuit, the other end of the other side-maintenance switch circuit is electrically connected to the at least one load, and the other side-maintenance switch circuit is used for enabling the external power supply to supply power for the at least one load when the at least one uninterruptible power supply unit cannot supply power for the at least one load.

5. The power supply system of claim 4, wherein the dimensional bypass switch circuit comprises at least one first circuit breaker, one end of each first circuit breaker is electrically connected with the incoming switch circuit, and the other end of each first circuit breaker is electrically connected with a load electrically connected to an output terminal of one uninterruptible power supply unit.

6. The power supply system according to any one of claims 1 to 3, further comprising:

at least one switching circuit respectively disposed in the at least one uninterruptible power supply unit; wherein, switching circuit's one end connect in an isolator with between the inlet wire switching circuit, the other end connect in another isolator with between at least one load, be used for the uninterrupted power source unit that switching circuit was located can not be for when at least one load supplies power, let external power supply be at least one load supplies power.

7. The power supply system according to any one of claims 1 to 3, further comprising:

and the transformer circuit is electrically connected on the incoming line switch circuit and used for converting the electric signal input by the external power supply into an electric signal with set voltage.

8. The power supply system according to any one of claims 1 to 3, further comprising:

the incoming line switching circuit is electrically connected with the input end of the at least one uninterrupted power supply unit through the input bus;

the output ends of the near-maintenance switch circuit and the uninterrupted power supply unit are electrically connected with the at least one load through the at least one output bus bar.

9. The power supply system according to any one of claims 1 to 3, wherein the incoming line switch circuit comprises a second circuit breaker and a third circuit breaker, one end of the first circuit breaker is electrically connected with the transformer circuit, one end of the second circuit breaker is electrically connected with the standby power supply, and the other end of the first circuit breaker and the other end of the second circuit breaker are both electrically connected with the wielder switch circuit and/or the at least one uninterruptible power supply unit.