UPS (Uninterrupted Power Supply) system with multi-voltage output

Abstract

The utility model provides a multi-voltage output UPS (Uninterrupted Power Supply) system, which comprises UPS equipment, a first voltage output device, a voltage adjusting device and a second voltage output device, when a plurality of UPS devices work in a redundant parallel operation or capacity-increasing parallel connection mode, loads are automatically and uniformly distributed among the UPS devices, if one UPS device breaks down or needs to be maintained, the UPS device is off-line and off-line, and the remaining UPS devices automatically and uniformly distributed with the loads, so that the balance of the load rates among the UPS devices is good, and the service life of the UPS devices is prolonged. The overall utilization rate of the UPS equipment is improved, the service life of the UPS equipment is prolonged, and the redundancy function of the UPS equipment is also increased. The arrangement of the voltage adjusting device ensures that the system can realize power supply voltage output of at least two voltage levels, and UPS systems with different voltage levels of output do not need to be independently constructed, so that the construction cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power electronics, especially relates to a multi-voltage output UPS system. BACKGROUND

[0002] The UPS system (Uninterruptible Power Supply) is an important power protection device, which can provide uninterrupted power supply when the mains is abnormal, and ensure the normal operation of the key equipment. The existing UPS configuration system is single voltage grade output, in the semiconductor industry, the demand capacity of 208V voltage grade is greater than that of 380V voltage grade, but both groups of voltage are necessary. That is, two independent UPS systems need to be built, one group outputs 208V voltage, and the other group outputs 380V voltage. The use capacity of 208V is relatively large, and the use capacity of 380V is relatively small, so the load rate of the UPS outputting 208V voltage is relatively high, and the load rate of the UPS outputting 380V voltage is relatively low, which causes the problem of unbalanced resource use.

[0003] Under the same construction cost, the UPS device of the single voltage grade output UPS configuration system has no redundancy setting, and the load rates of the UPS devices are inconsistent when the demand capacities of different voltage grades are inconsistent. The utilization rate of the UPS device with low load rate is low, and the unit cost is high. The UPS device with high load rate generates a large amount of heat, which affects the service life of the system in the long run. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a multi-voltage output UPS system to solve the problem of inconsistent load rate of the UPS device and unbalanced resource use in the construction of the UPS system with different voltage grades.

[0005] To solve the above technical problems, the utility model provides a multi-voltage output UPS system, which comprises a UPS device, a first voltage output device, a voltage adjusting device and a second voltage output device.

[0006] The UPS device is used for converting the mains into a first power supply voltage, the UPS device is connected with the first voltage output device, and a plurality of UPS devices are connected in parallel, the first voltage output device is used for outputting the first power supply voltage to a first load, the voltage adjusting device is connected with the first voltage output device and is used for converting the first power supply voltage into a second power supply voltage, and the second voltage output device is connected with the voltage adjusting device and is used for outputting the second power supply voltage to a second load.

[0007] Optionally, the first voltage output device comprises a UPS output cabinet, a main busbar and a first feeder cabinet, a plurality of the UPS devices are connected in parallel to the UPS output cabinet, the main busbar is connected to the UPS output cabinet, the main busbar is connected to the voltage adjustment device, and the first feeder cabinet is connected to the main busbar and the first load respectively.

[0008] Optionally, the number of the first feeder cabinets is plural.

[0009] Optionally, the voltage adjustment device comprises a transformer input cabinet, a transformer connected to the transformer input cabinet and a transformer output cabinet connected to the transformer, the transformer input cabinet is connected to the first voltage output device, and the transformer output cabinet is connected to the second voltage output device.

[0010] Optionally, the second voltage output device comprises a secondary busbar and a second feeder cabinet, the secondary busbar is connected to the voltage adjustment device, and the second feeder cabinet is connected to the secondary busbar and the second load respectively.

[0011] Optionally, the number of the second feeder cabinets is plural.

[0012] Optionally, the UPS device comprises a rectifier, an inverter, a battery and a static switch, the input end of the rectifier is connected to the commercial power, the output end of the rectifier is connected to the input end of the inverter, the output end of the inverter is connected to the first voltage output device, the output end of the rectifier is connected to the battery through the charge-discharge circuit, one end of the static switch is connected to the commercial power, and the other end of the static switch is connected to the first voltage output device.

[0013] Optionally, the multi-voltage output UPS system further comprises a maintenance bypass power supply connected to the first voltage output device, and the first voltage output device is configured to output the voltage of the maintenance bypass power supply to the first load and the voltage adjustment device.

[0014] Optionally, the first supply voltage is greater than the second supply voltage.

[0015] Optionally, the number of the UPS devices is three.

[0016] Optionally, the number of the voltage adjustment devices is at least two, the number of the second voltage output devices is at least two, the voltage adjustment devices correspond to the second voltage output devices one by one, and the second supply voltages of the voltage adjustment devices are different.

[0017] The UPS system with multiple voltage outputs as above, when multiple UPS devices are in the working mode of redundancy parallel or capacity-increasing parallel, the load is automatically divided among the UPS devices, if one of the UPS devices fails or needs to be repaired, the UPS device is offline, and the remaining UPS devices automatically divide the load, thus, the load rate balance among the UPS devices is better, which is beneficial to improve the overall utilization rate and adjustment service life of the UPS devices, and also increases the redundancy function of the UPS devices. The voltage adjusting device ensures that the system can realize power supply voltage output of at least two voltage levels, and does not need to separately construct UPS systems with different voltage level outputs, thereby reducing the construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Those skilled in the art should understand that the provided drawings are used to better understand the present application, and do not constitute any limitation on the scope of the present application. Among them:

[0019] Figure 1 is a schematic diagram of a multiple voltage output UPS system according to an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of a UPS device according to an embodiment of the present application;

[0021] Figure 3 is another schematic diagram of a multiple voltage output UPS system according to an embodiment of the present application.

[0022] In the drawings:

[0023] 10-UPS device; 11-rectifier; 12-inverter; 13-battery; 14-charge and discharge circuit; 15-static switch; 20-first voltage output device; 21-UPS output cabinet; 22-main bus; 23-first feeder cabinet; 30-voltage adjusting device; 31-transformer input cabinet; 32-transformer; 33-transformer output cabinet; 40-second voltage output device; 41-secondary bus; 42-second feeder cabinet; 50-first load; 60-second load; 70-repair bypass power supply; 80-bypass cabinet. DETAILED DESCRIPTION

[0024] In order to make the purpose, advantages and characteristics of the present application clearer, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be noted that the drawings are all very simplified and not drawn to scale, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present application. In addition, the structures shown in the drawings are often part of the actual structures. In particular, different scales are sometimes used in different emphasis of the drawings.

[0025] As used in the present application, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The term "or" is generally employed in its sense of "and / or" unless the content clearly dictates otherwise. The term "a number of" is generally employed in its sense of "at least one" unless the content clearly dictates otherwise. The term "at least two" is generally employed in its sense of "two or more" unless the content clearly dictates otherwise. In addition, the terms "first," "second," "third," etc. are used only to describe different instances and do not imply or suggest relative importance or imply a number of the indicated technical features. Thus, features qualified by "first," "second," "third," etc. can expressly or implicitly include one or at least two of the features. The terms "one end" and "the other end" and "proximal end" and "distal end" generally refer to two parts corresponding to each other, which not only include end points, but also the terms "mounting," "connecting," and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. In addition, as used in the present application, a component disposed in another component generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two components, and the two components can be directly connected or indirectly connected through an intermediate component, and cannot be understood as indicating or suggesting the spatial positional relationship between the two components, i.e. one component can be in any orientation inside, outside, above, below or one side of another component, unless the content clearly indicates otherwise. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Figure 1 is a schematic diagram of a multi-voltage output UPS system according to an embodiment of the present application. Referring to Figure 1The utility model discloses a UPS system of multi -voltage output, including many UPS equipment 10, first voltage output device 20, voltage adjustment device 30 and second voltage output device 40, and UPS equipment 10 is used to convert commercial power into first power supply voltage, and UPS equipment 10 is connected with first voltage output device 20, and many UPS equipment 10 is arranged in parallel, and first voltage output device 20 is used to output first power supply voltage to first load 50 to power supply first load 50. The input of voltage adjustment device 30 is connected with first voltage output device 20, and the output of voltage adjustment device 30 is connected with second voltage output device 40, and voltage adjustment device 30 is used to convert first power supply voltage into second power supply voltage, and is used to output second power supply voltage to second load 60 to power supply second load 60. The adjustment mode of voltage adjustment device 30 to first power supply voltage is such as step-up, step-down. Understandable, the power supply voltage grade required by first load 50 and second load 60 respectively is different, for example, the grade of the power supply voltage required by first load 50 is greater than the grade of the power supply voltage required by second load 60, and thus, first power supply voltage is greater than second power supply voltage, and first power supply voltage is for example 380V, and second power supply voltage is 208V. In the system, many UPS equipment 10 are in the working mode of redundancy parallel or capacity parallel, and each UPS equipment 10 is automatically divided among the load, if one of the UPS equipment 10 fails or needs maintenance, the UPS equipment 10 is offline, and the remaining UPS equipment 10 is automatically divided among the load, and thus, the load rate balance between the UPS equipment 10 is better, which is conducive to improving the overall utilization rate and the adjustment service life of the UPS equipment 10, and also increases the redundancy function of the UPS equipment 10. The setting of voltage adjustment device 30 ensures that the system can realize at least two voltage grade power supply voltage outputs, and does not need to construct many groups of UPS systems of different voltage grade outputs separately, thereby reducing construction cost.

[0027] Further, the number of voltage adjustment devices 30 is at least two, the number of second voltage output devices 40 is at least two, and the voltage adjustment devices 30 and the second voltage output devices 40 correspond one-to-one, and the second power supply voltages of each voltage adjustment device 30 are different. In this way, the first power supply voltage can be converted into second power supply voltages of multiple different voltage grades by increasing the number of voltage adjustment devices 30, and the corresponding second voltage output devices 40 can be used to supply power to second loads 60 of the corresponding voltage grades, thereby realizing the power supply function of multiple different second power supply voltages of the system and meeting the power supply needs of different second loads 60.

[0028] Figure 2 is the schematic diagram of the UPS equipment of an embodiment of the utility model. Further, referring to Figure 2The UPS device 10 comprises a rectifier 11, an inverter 12, a battery 13 and a static switch 15, the input end of the rectifier 11 is connected to the commercial power (for example, 380V), the output end of the rectifier 11 is connected to the input end of the inverter 12, the output end of the inverter 12 is connected to the first voltage output device 20, the output end of the rectifier 11 is connected to the battery 13 through a charge-discharge circuit 14, one end of the static switch 15 is connected to the commercial power, and the other end of the static switch 15 is connected to the first voltage output device 20. The rectifier 11 converts the commercial power into direct current and charges the battery 13 through the charge-discharge circuit 14; the inverter 12 converts the direct current into alternating current (namely, the first power supply voltage) and provides stable power output. When the commercial power is terminated, the voltage of the battery 13 is converted into alternating current by the inverter 12 and output to the first voltage output device 20. The static switch 15 is composed of two reverse-parallel controllable silicones (SCRs) for example, and the static switch 15 can switch the commercial power directly to the first voltage output device 20 when the inverter 12 fails.

[0029] Further, the first voltage output device 20 comprises a UPS output cabinet 21, a main bus 22 and a first feeder cabinet 23, a plurality of UPS devices 10 are connected in parallel to the UPS output cabinet 21, the UPS device 10 converts the commercial power into the first power supply voltage and outputs the first power supply voltage to the UPS output cabinet 21, the main bus 22 is connected to the UPS output cabinet 21 and transmits the first power supply voltage to the main bus 22, the main bus 22 is connected to the voltage adjustment device 30 and transmits the first power supply voltage to the voltage adjustment device 30, and the two sides of the first feeder cabinet 23 are connected to the main bus 22 and the first load 50 respectively, the first feeder cabinet 23 outputs the first power supply voltage to the first load 50 and supplies power to the first load 50. Optionally, the number of the first feeder cabinet 23 is plural, and the number of the first feeder cabinet 23 can be configured according to the number of the first load 50 to be connected, and the plurality of first feeder cabinets 23 are connected in parallel to the main bus 22.

[0030] Figure 3 is another schematic view of the multi-voltage output UPS system of one embodiment of the utility model. Further, referring to Figure 3 , the voltage adjustment device 30 comprises a transformer input cabinet 31, a transformer 32 connected to the transformer input cabinet 31 and a transformer output cabinet 33 connected to the transformer 32, the transformer input cabinet 31 is connected to the first voltage output device 20, and the transformer output cabinet 33 is connected to the second voltage output device 40. The first power supply voltage is input to the transformer 32 through the transformer input cabinet 31, the second power supply voltage is obtained through the transformer 32, and the second power supply voltage is output to the second voltage output device 40 through the transformer output cabinet 33.

[0031] Further, the second voltage output device 40 comprises a secondary busbar 41 and a second feeder cabinet 42, the secondary busbar 41 is connected with the voltage adjustment device 30, the voltage adjustment device 30 outputs the second power supply voltage to the secondary busbar 41, two sides of the second feeder cabinet 42 are connected with the secondary busbar 41 and the second load 60 respectively, the secondary busbar 41 outputs the second power supply voltage to the second load 60 through the second feeder cabinet 42, and the second load 60 is provided with power. Optionally, the number of the second feeder cabinets 42 is multiple, and the number of the second feeder cabinets 42 can be configured according to the number of the second loads 60 to be connected as needed, and the multiple second feeder cabinets 42 are connected in parallel on the secondary busbar 41.

[0032] Further, the multi-voltage output UPS system further comprises a maintenance bypass power supply 70 connected with the first voltage output device 20, the maintenance bypass power supply 70 is connected with a bypass cabinet 80, and the bypass cabinet 80 is connected with the main busbar 22. The first voltage output device 20 is used for outputting the voltage of the maintenance bypass power supply 70 to the first load 50 and the voltage adjustment device 30. When all the UPS devices 10 are faulty or need to be maintained, the maintenance bypass power supply 70 is connected with the first voltage output device 20 (specifically connected with the main busbar 22), and the voltage of the maintenance bypass power supply 70 is output to the first feeder cabinet 23, so as to supply power to the first load 50, and the voltage of the maintenance bypass power supply 70 enters the transformer 32 through the transformer input cabinet 31, and the second power supply voltage is obtained through the voltage transformation processing of the transformer 32, and the second load 60 is continuously supplied with power. The setting of the maintenance bypass power supply 70 can ensure that the power supply of the first load 50 and the second load 60 is uninterrupted when all the UPS devices 10 are offline.

[0033] Preferably, the number of the UPS devices 10 is three. Generally, if the load rate of a single UPS device 10 is too high, the service life of the UPS device 10 will be affected, and if the load rate is too low, the construction cost will be increased, and generally the load rate is controlled to be 40% to 60%, and the maximum is not more than 60%. For example, in the embodiment, three 500kVA UPS devices 10 are adopted, and then the controlled terminal load is not more than 945kVA.

[0034] In the embodiment, the UPS systems of two voltage grades are integrated together, and two separate UPS systems do not need to be constructed, the voltage output of the two voltage grades is ensured, and the construction cost can be greatly reduced, for example, one set of maintenance bypass power supply 70, the number of the UPS output cabinets 21 and the number of the voltage adjustment devices 30 can be saved.

[0035] Although the utility model discloses the above with preferable embodiment, however the above embodiment is not used to limit the utility model. For any person skilled in the art, without departing from the utility model technical scheme range, can utilize the technical content disclosed above to the utility model technical scheme make many possible change and modification, or modify as equivalent variation equivalent embodiment. Therefore, any simple modification, equivalent variation and modification of the above embodiment according to the technical essence of the utility model, all still belong to the range of the utility model technical scheme protection.

Claims

1. A multi-voltage output UPS system, characterized by, The UPS device, the first voltage output device, the voltage adjustment device and the second voltage output device are included. The UPS device is used for converting commercial power into a first power supply voltage, the UPS device is connected with the first voltage output device, and a plurality of UPS devices are connected in parallel, the first voltage output device is used for outputting the first power supply voltage to a first load; the voltage adjustment device is connected with the first voltage output device and is used for converting the first power supply voltage into a second power supply voltage. The second voltage output device is connected with the voltage adjustment device and is used for outputting the second power supply voltage to a second load.

2. The multiple-voltage output UPS system of claim 1, wherein, The first voltage output device includes a UPS output cabinet, a main busbar and a first feeder cabinet, a plurality of UPS devices are connected in parallel with the UPS output cabinet, the main busbar is connected with the UPS output cabinet, the main busbar is connected with the voltage adjustment device, and two sides of the first feeder cabinet are connected with the main busbar and the first load respectively.

3. The multiple-voltage output UPS system of claim 2, wherein, The number of the first feeder cabinets is multiple.

4. The multiple-voltage output UPS system of claim 1, wherein, The voltage adjustment device includes a transformer input cabinet, a transformer connected with the transformer input cabinet and a transformer output cabinet connected with the transformer, the transformer input cabinet is connected with the first voltage output device, and the transformer output cabinet is connected with the second voltage output device.

5. The multiple-voltage output UPS system of claim 1, wherein, The second voltage output device includes a secondary busbar and a second feeder cabinet, the secondary busbar is connected with the voltage adjustment device, and two sides of the second feeder cabinet are connected with the secondary busbar and the second load respectively.

6. The multiple-voltage output UPS system of claim 5, wherein, The number of the second feeder cabinets is multiple.

7. The multiple-voltage output UPS system of claim 1, wherein, The UPS device includes a rectifier, an inverter, a battery, a charge-discharge circuit and a static switch, an input end of the rectifier is connected with the commercial power, an output end of the rectifier is connected with an input end of the inverter, an output end of the inverter is connected with the first voltage output device, an output end of the rectifier is connected with the battery through the charge-discharge circuit, one end of the static switch is connected with the commercial power, and the other end of the static switch is connected with the first voltage output device.

8. The multiple-voltage output UPS system of claim 1, wherein, The multi-voltage output UPS system further includes a maintenance bypass power supply connected with the first voltage output device, and the first voltage output device is used for outputting a voltage of the maintenance bypass power supply to the first load and the voltage adjustment device.

9. The multiple-voltage output UPS system of claim 1, wherein, The first power supply voltage is greater than the second power supply voltage.

10. The multiple-voltage output UPS system of claim 1, wherein, The number of the voltage adjustment devices is at least two, the number of the second voltage output devices is at least two, and the voltage adjustment devices and the second voltage output devices correspond to each other, and the second power supply voltages of the voltage adjustment devices are different.

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