A switchable power supply for air separation oxygen production
By introducing a combination of UPS power supply and dual power transfer switch into the air separation oxygen production equipment, the problem of excessively long power switching time was solved, enabling immediate power restoration, ensuring continuous operation of the equipment, and avoiding production stoppage losses.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGSHU LONGTENG SPECIAL STEEL CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-06-02
AI Technical Summary
When the existing air separation oxygen production equipment experiences a sudden 10KV power outage, the EPS power switching time is too long, resulting in the inability to seamlessly switch power, causing equipment power outages and production stoppages, and causing huge losses to the company.
The system adopts a combination of UPS power supply and dual power transfer switch. The UPS power supply includes a battery and a bypass low-voltage input line to ensure immediate power supply when the high-voltage power supply module fails, achieving fast and seamless switching.
It enables immediate power restoration during high-voltage power outages, preventing equipment shutdowns, ensuring production continuity, and reducing losses caused by power outages.
Smart Images
Figure CN224319101U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air separation oxygen production, and in particular to a switchable power supply for air separation oxygen production. Background Technology
[0002] The original dual-power switching system for the air separation oxygen production equipment in the energy power plant used two incoming lines. One line supplied power from the plant's substation (10kV) to the 10kV switchgear in the air separation oxygen production high-voltage room, then stepped down by a transformer to the low-voltage switchgear. The low-voltage switchgear output connected to the 400V low-voltage busbar, which in turn connected to the dual-power automatic transfer switch incoming line. The other line supplied power from the EPS (Emergency Power Supply) to the dual-power automatic transfer switch incoming line. Both power supplies were output to the production equipment power cabinet via the dual-power automatic transfer switch. In actual use, when a sudden power outage occurred from the 10kV substation, one incoming line lost power. During the automatic switchover to the other EPS power supply, the EPS (Emergency Power Supply) switching time was relatively long, approximately 5 seconds, causing the two power supplies to fail to switch seamlessly. This resulted in power outages for on-site equipment, workshop shutdowns, and significant losses to the company due to the shutdown of the air separation oxygen production line. Ironmaking and steelmaking also experienced unplanned shutdowns due to the interruption of energy supply. Utility Model Content
[0003] The purpose of this invention is to provide a switchable power supply for air separation oxygen production, which solves the problem of slow power restoration after power outage.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] This invention provides a switchable power supply for air separation oxygen production, including a high-voltage power supply module and a dual power supply switching switch.
[0006] The high-voltage power supply module includes a high-voltage switchgear, a transformer, and a low-voltage switchgear. The high-voltage switchgear is connected to an external high-voltage power supply. The high-voltage switchgear is electrically connected to the transformer, and the transformer is electrically connected to the low-voltage switchgear.
[0007] A UPS power supply is provided between the low-voltage switchgear and the dual power transfer switch, and the UPS power supply is electrically connected to both the low-voltage switchgear and the dual power transfer switch.
[0008] The UPS power supply has a battery and a bypass low-voltage input line. The battery is used to supply power to the UPS power supply, and the bypass low-voltage input line is used to connect to an external low-voltage power supply.
[0009] Optionally, the high-voltage switchgear is characterized by having a trolley switch, an outgoing current transformer, and a zero-sequence transformer installed inside the trolley switch, wherein the trolley switch is electrically connected to the outgoing current transformer, and the outgoing current transformer is electrically connected to the zero-sequence transformer.
[0010] Optionally, the high-voltage switchgear is characterized by having a grounding switch, a live indicator, and an overcurrent protector connected in parallel.
[0011] Optionally, a surge protector is provided in conjunction with the transformer.
[0012] Optionally, the low-voltage switchgear is equipped with an incoming current transformer and a low-voltage circuit breaker, and the incoming current transformer is electrically connected to the low-voltage circuit breaker.
[0013] Optionally, the low-voltage switchgear is electrically connected to the low-voltage busbar, and the low-voltage busbar is electrically connected to the UPS power supply.
[0014] Optionally, a first voltage transmitter is electrically connected to the first conductor, and a first alarm device is signal-connected to the first voltage transmitter.
[0015] Optionally, a second voltage transmitter is electrically connected to the second conductor, and the second voltage transmitter is signal-connected to a second alarm device.
[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0017] This utility model discloses a switchable power supply for air separation oxygen production. Due to the connection of a UPS power supply, which contains a battery and a bypass low-voltage input line, the battery and bypass low-voltage input line provide immediate power when the high-voltage power supply module is interrupted. In this way, the dual power supply switch is always in the power supply state, thus solving the problem of slow power restoration after power interruption. Attached Figure Description
[0018] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:
[0019] Figure 1 This is a schematic diagram of a switchable power supply connection for an air separation oxygen generator according to a preferred embodiment of the present invention;
[0020] Figure 2 yes Figure 1 The diagram shows the connection of the high-voltage power supply module.
[0021] Figure 3This is an enlarged schematic diagram of the dual power transfer switch and UPS power supply connection.
[0022] The reference numerals in the attached figures are explained as follows:
[0023] 1. High-voltage power supply module; 2. Dual power supply transfer switch; 3. UPS power supply; 4. Low-voltage busbar;
[0024] 5. Emergency power supply; 10. Surge protector; 11. High-voltage switchgear; 12. Transformer; 13. Low-voltage switchgear; 14. Trolley switch; 15. Outgoing current transformer; 16. Zero-sequence transformer; 17. Grounding switch; 18. Live indicator; 19. Overcurrent protector; 21. First conductor; 22. Second conductor; 23. First voltage transmitter; 24. Second voltage transmitter; 25. First alarm; 26. Second alarm; 27. Third molded case circuit breaker; 31. Battery; 32. Bypass low-voltage incoming line; 33. Third conductor; 35. First molded case circuit breaker; 36. Second molded case circuit breaker; 131. Incoming current transformer; 132. Low-voltage circuit breaker. Detailed Implementation
[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0028] like Figure 1 and Figure 2 and Figure 3 As shown, a switchable power supply for air separation oxygen generation includes a high-voltage power supply module 1 and a dual power supply switching switch 2. The high-voltage power supply module 1 is used to connect to an external high-voltage power supply, and the dual power supply switching switch 2 is used to connect to various external electrical equipment.
[0029] The high-voltage power supply module 1 includes a high-voltage switchgear 11, a transformer 12, and a low-voltage switchgear 13. The high-voltage switchgear 11 is connected to an external high-voltage power supply. The high-voltage switchgear 11 is electrically connected to the transformer 12, and the transformer 12 is electrically connected to the low-voltage switchgear 13. The high-voltage electricity is converted into low-voltage electricity by the transformer 12, and the low-voltage electricity then comes out from the low-voltage switchgear 13.
[0030] A UPS (Uninterruptible Power Supply) 3 is installed between the low-voltage switchgear 13 and the dual power transfer switch 2. The UPS 3 is electrically connected to both the low-voltage switchgear 13 and the dual power transfer switch 2. The low-voltage switchgear 13 supplies low-voltage power to the UPS 3, and then the UPS 3 supplies power to the dual power transfer switch 2.
[0031] The UPS power supply 3 has a battery 31 inside and a bypass low-voltage input line 32. The battery 31 is used to supply power to the UPS power supply 3, and the bypass low-voltage input line 32 is used to connect to an external low-voltage power supply.
[0032] UPS power supplies typically have a large power capacity and a long power supply time, enabling multiple devices to operate for extended periods. In addition, UPS power supplies also have functions such as power conversion, voltage and frequency stabilization, and can filter out noise and interference in the power supply, providing clean and stable power.
[0033] Furthermore, the switching time of UPS power supply 3 is very short, generally between a few milliseconds and tens of milliseconds, which can achieve seamless switching and ensure that the load equipment is not affected by the mains power interruption.
[0034] In this way, the UPS power supply 3 has three power supply channels. If the high-voltage power supply module 1 loses power, the bypass low-voltage input line 32 will continue to supply power. If the bypass low-voltage input line 32 loses power, the high-voltage power supply module 1 will continue to supply power. If both the high-voltage power supply module 1 and the bypass low-voltage input line 32 lose power, the battery 31 will be put into operation to supply power, so that the dual power supply switching switch 2 will supply power uninterruptedly.
[0035] The high-voltage switchgear 11 is equipped with a trolley switch 14, an outgoing current transformer 15, and a zero-sequence transformer 16. The trolley switch 14 is electrically connected to the outgoing current transformer 15, and the outgoing current transformer 15 is electrically connected to the zero-sequence transformer 16. The outgoing current transformer 15 is located between the trolley switch 14 and the zero-sequence transformer 16.
[0036] The high-voltage switchgear 11 is equipped with a grounding switch 17, a live indicator 18 and an overcurrent protector 19 connected in parallel. The grounding switch 17, the live indicator 18 and the overcurrent protector 19 are also connected in parallel with the zero-sequence sensor 16.
[0037] A surge protector 10 is installed in conjunction with the transformer 12. When an overvoltage occurs in the circuit, the surge protector 10 will respond quickly and discharge the overvoltage to the ground to ensure that the transformer 12 is not damaged.
[0038] The low-voltage switchgear 13 is equipped with an incoming current transformer 131 and a low-voltage circuit breaker 132. The incoming current transformer 131 is electrically connected to the low-voltage circuit breaker 132, and the low-voltage circuit breaker 132 is electrically connected to the UPS power supply 3.
[0039] A low-voltage busbar 4 is provided between the low-voltage switchgear 13 and the UPS power supply 3, and the low-voltage busbar 4 is electrically connected to the UPS power supply 3 and the low-voltage switchgear 13.
[0040] A third conductor 33 is externally connected to the UPS power supply 3. The third conductor 33 is electrically connected to the UPS power supply 3 and the low-voltage bus 4. A first molded case circuit breaker 35 is installed on the third conductor 33, and a second molded case circuit breaker 36 is installed on the bypass low-voltage incoming line 32.
[0041] A first wire 21 is provided between the UPS power supply 3 and the dual power transfer switch 2. The two ends of the first wire 21 are electrically connected to the UPS power supply 3 and the dual power transfer switch 2, respectively. A first voltage transmitter 23 is electrically connected to the first wire 21. A first alarm 25 is signal connected to the first voltage transmitter 23. The first voltage transmitter 23 monitors whether the first wire 21 is energized. If the first wire 21 is not energized, the first alarm 25 will sound an alarm.
[0042] The dual power transfer switch 2 is electrically connected to the emergency power supply 5. The emergency power supply 5 can also provide emergency power support to the dual power transfer switch 2. A second wire 22 is provided between the dual power transfer switch 2 and the emergency power supply 5. The second wire 22 is electrically connected to the dual power transfer switch 2 and the emergency power supply 5.
[0043] A second voltage transmitter 24 is electrically connected to the second conductor 22. The second voltage transmitter 24 is signal-connected to a second alarm 26. The second voltage transmitter 24 monitors whether the second conductor 22 is energized. If the second conductor 22 is not energized, the second alarm 26 will sound an alarm. A third molded case circuit breaker 27 is installed on the second conductor 22.
[0044] The preferred power supply is UPS power supply 3 supplying power to dual power transfer switch 2. If the power supply from UPS power supply 3 is interrupted, the first alarm 25 will sound an alarm and the third molded case circuit breaker 27 will be activated. The backup power supply 5 will be manually activated quickly to supply power to dual power transfer switch 2, thereby ensuring that dual power transfer switch 2 continues to supply power. When the backup power supply 5 is not activated to supply power to dual power transfer switch 2, the third molded case circuit breaker 27 will be open.
[0045] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.
Claims
1. A switchable power supply for air separation oxygen production, comprising a high-voltage power supply module (1) and a dual power supply switching switch (2), characterized in that, The high-voltage power supply module (1) includes a high-voltage switch cabinet (11), a transformer (12) and a low-voltage switch cabinet (13). The high-voltage switch cabinet (11) is connected to an external high-voltage power supply. The high-voltage switch cabinet (11) is electrically connected to the transformer (12), and the transformer (12) is electrically connected to the low-voltage switch cabinet (13). A UPS power supply (3) is provided between the low-voltage switch cabinet (13) and the dual power supply switching switch (2), and the UPS power supply (3) is electrically connected to the low-voltage switch cabinet (13) and the dual power supply switching switch (2) respectively. The UPS power supply (3) contains a battery (31) and a bypass low-voltage input line (32). The battery (31) is used to supply power to the UPS power supply (3), and the bypass low-voltage input line (32) is used to connect to an external low-voltage power supply. A first wire (21) is provided between the UPS power supply (3) and the dual power switch (2). The two ends of the first wire (21) are electrically connected to the UPS power supply (3) and the dual power switch (2), respectively. The dual power switch (2) is electrically connected to the backup power supply (5). A second wire (22) is provided between the dual power switch (2) and the backup power supply (5). The second wire (22) is electrically connected to the dual power switch (2) and the backup power supply (5).
2. The switchable power supply for air separation oxygen production according to claim 1, characterized in that, The high-voltage switchgear (11) is equipped with a trolley switch (14), an outgoing current transformer (15), and a zero-sequence transformer (16). The trolley switch (14) is electrically connected to the outgoing current transformer (15), and the outgoing current transformer (15) is electrically connected to the zero-sequence transformer (16).
3. The switchable power supply for air separation oxygen generation according to claim 1, characterized in that, The high-voltage switchgear (11) is equipped with a grounding knife (17), a live indicator (18), and an overcurrent protector (19) connected in parallel.
4. The switchable power supply for air separation oxygen production according to claim 1, characterized in that, A surge protector (10) is provided in conjunction with the transformer (12).
5. The switchable power supply for air separation oxygen production according to claim 1, characterized in that, The low-voltage switchgear (13) is equipped with an incoming current transformer (131) and a low-voltage circuit breaker (132), and the incoming current transformer (131) is electrically connected to the low-voltage circuit breaker (132).
6. The switchable power supply for air separation oxygen production according to claim 1, characterized in that, A low-voltage busbar (4) is provided between the low-voltage switchgear (13) and the UPS power supply (3), and the low-voltage busbar (4) is electrically connected to the UPS power supply (3) and the low-voltage switchgear (13).
7. The switchable power supply for air separation oxygen production according to claim 1, characterized in that, A first voltage transmitter (23) is electrically connected to the first wire (21), and a first alarm (25) is signal connected to the first voltage transmitter (23).
8. The switchable power supply for air separation oxygen production according to claim 1, characterized in that, A second voltage transmitter (24) is electrically connected to the second conductor (22), and a second alarm (26) is connected to the second voltage transmitter (24).