CN212676943U - Structure for live-line-free maintenance of UPS (uninterrupted Power supply) host system - Google Patents
Structure for live-line-free maintenance of UPS (uninterrupted Power supply) host system Download PDFInfo
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- CN212676943U CN212676943U CN202021198661.7U CN202021198661U CN212676943U CN 212676943 U CN212676943 U CN 212676943U CN 202021198661 U CN202021198661 U CN 202021198661U CN 212676943 U CN212676943 U CN 212676943U
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Abstract
The utility model relates to a structure that is used for UPS host computer system to have electrified maintenance, its characterized in that: the UPS main machine cabinet and the UPS bypass cabinet respectively adopt AC-DC-AC converters; the UPS main cabinet is internally provided with a static switch, the static switch is provided with two input ends and one output end, the input ends are connected with the power output end of the UPS main cabinet and the output end of a bypass change-over switch QF2 in the UPS bypass cabinet to form an automatic bypass; the output end of the static switch is connected with a load through one of the load switches; the UPS bypass cabinet is provided with a bypass change-over switch QF2 and a first dimension modification bypass switch QX1, the input end of the bypass change-over switch QF2 is connected with the power output end of the UPS bypass cabinet through a wiring terminal row, and the output end of the first dimension modification bypass switch QX1 is connected with a load through a second dimension modification bypass switch QX2, so that a UPS maintenance bypass is formed. Has the characteristics of electric shock accident prevention, safety, convenience and the like.
Description
Technical Field
The utility model relates to a structure that is used for UPS host computer system to have no electrified maintenance is applicable to the important auxiliary assembly UPS system in power plant's maintenance without electrification. Belongs to the technical field of power generation industry and accessory equipment.
Background
At present, most power plants in China are provided with a UPS system which mainly supplies power to important loads, so that the UPS system has few chances to stop completely, and when a host of the UPS system is maintained, the UPS bypass system supplies power. In the prior art, because the connection structure between the UPS bypass system of the power plant and the UPS host system is unreasonable, when the UPS bypass system supplies power to an important load, a live component still exists in the UPS host system, and therefore the following problems exist: when the UPS host system fails and the bypass system supplies power, the UPS host system is electrified, and maintenance personnel can carry out electrified operation on the UPS host system during maintenance work, so that electric shock accidents and potential safety hazards are easy to happen.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving prior art and maintaining the problem of during operation live working, taking place the electric shock accident easily at UPS host system, providing a structure that is used for UPS host system to have no electrified maintenance, have UPS host system and maintain the during operation electroless operation, prevent to take place electric shock accident, safe outstanding substantive characteristics such as convenient and showing technological progress.
The purpose of the utility model can be achieved by adopting the following technical scheme:
the utility model provides a structure that is used for UPS host computer system to have no electrified maintenance, its structural feature lies in: the UPS main machine cabinet and the UPS bypass cabinet respectively adopt AC-DC-AC converters; the UPS main cabinet is provided with a static switch, the static switch is provided with two input ends and one output end, one input end is connected with the power output end of the UPS main cabinet, and the other input end is connected with the output end of a bypass change-over switch QF2 in the UPS bypass cabinet through a main machine change-over switch Q2 to form an automatic bypass; the output end of the static switch is connected with a load through one of the load switches; a bypass change-over switch QF2 and a first dimension modification bypass switch QX1 are arranged in the UPS bypass cabinet, the input end of the bypass change-over switch QF2 is connected with the power output end of the UPS bypass cabinet through a wiring terminal row, the input end of the first dimension modification bypass switch QX1 is connected with the power output end of the UPS bypass cabinet, and the output end of the first dimension modification bypass switch QX1 is connected with a load through a second dimension modification bypass switch QX2 to form a UPS maintenance bypass; by arranging the bypass change-over switch QF2 and modifying the bypass switch QX1 in the first dimension, the non-electric maintenance switching structure of the UPS main cabinet is formed.
The purpose of the utility model can also be achieved by adopting the following technical scheme:
furthermore, a storage battery is arranged in the UPS main cabinet, a three-phase alternating current input voltage is converted into a stable direct current bus voltage through first-stage conversion AC-DC, and when the UPS main cabinet is in a normal power supply, the rectifier and the inverter work simultaneously to supply power to a load and charge the storage battery; when the UPS main cabinet is abnormal, the three-phase full-control bridge rectifier stops working, and the battery supplies power to the load through the inverter; when the battery voltage drops to the set voltage and the power supply of the host computer is not recovered to be normal, the UPS can be supplied with power by the automatic bypass.
Further, a three-phase fully-controlled bridge rectifier is adopted for the first-stage conversion of AC-DC to convert the three-phase alternating-current input voltage into stable direct-current bus voltage; the main power of the second-stage conversion DC-AC inverter adopts a high-power transistor as an inversion element thereof to invert the DC bus voltage to AC voltage.
Furthermore, a wiring terminal block is arranged in the UPS bypass cabinet 2, a power output end of the UPS bypass cabinet is arranged on the wiring terminal block, and the power output end of the UPS bypass cabinet is connected with the bypass change-over switch QF2 and the first dimension modification bypass switch QX1 through the wiring terminal block, so that a UPS main cabinet electroless maintenance switching loop is formed.
The utility model discloses there is following outstanding substantive characteristics and showing the progress:
1. the utility model relates to a structure for UPS host system non-live overhaul, which comprises a UPS host cabinet and a UPS bypass cabinet, wherein AC-DC-AC converters are respectively adopted in the UPS host cabinet and the UPS bypass cabinet; the UPS main cabinet is provided with a static switch, the static switch is provided with two input ends and one output end, one input end is connected with the power output end of the UPS main cabinet, and the other input end is connected with the output end of a bypass change-over switch QF2 in the UPS bypass cabinet through a main machine change-over switch Q2 to form an automatic bypass; the output end of the static switch is connected with a load through one of the load switches; a bypass change-over switch QF2 and a first dimension modification bypass switch QX1 are arranged in the UPS bypass cabinet, the input end of the bypass change-over switch QF2 is connected with the power output end of the UPS bypass cabinet through a wiring terminal row, the input end of the first dimension modification bypass switch QX1 is connected with the power output end of the UPS bypass cabinet, and the output end of the first dimension modification bypass switch QX1 is connected with a load through a second dimension modification bypass switch QX2 to form a UPS maintenance bypass; by arranging the bypass change-over switch QF2 and modifying the bypass switch QX1 in the first dimension, the non-electric maintenance switching structure of the UPS main cabinet is formed. Therefore, the problems that the UPS host system is in live-line operation and is easy to have electric shock accidents in the maintenance work in the prior art can be solved, and the UPS host system has prominent substantive characteristics and obvious technical progress of no-power operation, electric shock accidents prevention, safety, convenience and the like in the maintenance work.
2. The utility model discloses a setting up bypass change over switch QF2 and first dimension and revising bypass switch QX1, forming the no electric maintenance switching structure of UPS host computer cabinet, when maintaining the UPS host computer cabinet, there is not electrified region in the UPS host computer cabinet, make the staff security improve greatly. Through with bypass system control unit and maintenance bypass control unit setting in UPS bypass cabinet in the host computer cabinet, make not have electrified region in the UPS host computer cabinet, can improve maintenance personal work safety nature.
Drawings
Fig. 1 is an electrical schematic block diagram of an embodiment of the present invention.
Detailed Description
Specific example 1:
referring to fig. 1, the structure for live overhaul of a UPS host system according to embodiment 1 includes a UPS host cabinet 1 and a UPS bypass cabinet 2, where the UPS host cabinet 1 and the UPS bypass cabinet 2 each employ an AC-DC-AC converter; a static switch is arranged in the UPS main cabinet 1, and the static switch is provided with two input ends and one output end, wherein one input end is connected with the power output end of the UPS main cabinet 1, and the other input end is connected with the output end of a bypass change-over switch QF2 in the UPS bypass cabinet 2 through a main machine change-over switch Q2 to form an automatic bypass; the output end of the static switch is connected with a load through one of the load switches; a bypass change-over switch QF2 and a first dimension modification bypass switch QX1 are arranged in the UPS bypass cabinet 2, the input end of the bypass change-over switch QF2 is connected with the power output end of the UPS bypass cabinet 2 through a wiring terminal row, the input end of the first dimension modification bypass switch QX1 is connected with the power output end of the UPS bypass cabinet 2, and the output end is connected with a load through a second dimension modification bypass switch QX2 to form a UPS maintenance bypass; by arranging the bypass change-over switch QF2 and the first dimension modification bypass switch QX1, the non-electric maintenance switching structure of the UPS main cabinet 1 is formed
In the present embodiment, the first and second electrodes are,
the UPS main machine cabinet 1 is internally provided with a storage battery, a three-phase alternating current input voltage is converted into a stable direct current bus voltage through first-stage conversion AC-DC, and when a power supply of the UPS main machine cabinet 1 is normal, a rectifier and an inverter work simultaneously to supply power to a load and charge the storage battery; when the UPS main cabinet 1 is abnormal, the three-phase full-control bridge rectifier stops working, and a battery supplies power to a load through an inverter; when the battery voltage drops to the set voltage and the power supply of the host computer is not recovered to be normal, the UPS can be supplied with power by the automatic bypass. The UPS main cabinet 1 may adopt a UPS power cabinet structure of a conventional art.
The first-stage conversion AC-DC adopts a conventional three-phase fully-controlled bridge rectifier to convert the three-phase alternating-current input voltage into stable direct-current bus voltage; the main power of the second-stage conversion DC-AC inverter adopts a conventional high-power transistor as an inversion element thereof to invert the voltage of the direct-current bus back to the alternating-current voltage.
The UPS bypass cabinet 2 is internally provided with a wiring terminal block, the power output end of the UPS bypass cabinet 2 is arranged on the wiring terminal block, and the power output end of the UPS bypass cabinet 2 is connected with the bypass change-over switch QF2 and the first dimension modification bypass switch QX1 through the wiring terminal block, so that a non-electric maintenance switching loop of the UPS main cabinet 1 is formed. The UPS bypass cabinet 2 may employ a conventional UPS power cabinet configuration.
Q2 provides power for the UPS host to the bypass power main cabinet internal transfer switch. A conventional transfer switch structure may be employed.
QF2 provides power for the UPS host to the bypass powered bypass in-cabinet diverter switch. A conventional transfer switch structure may be employed.
The first dimension modifying bypass switch QX1 and the second dimension modifying bypass switch QX2 may employ a switch structure of a conventional technique.
When the maintenance bypass is maintained by the UPS host, the switch at the side of the maintenance bypass is closed to supply power to the load section.
The method for the UPS host system to overhaul without electrification in the embodiment is characterized in that:
1) the UPS main machine cabinet 1 and the UPS bypass cabinet 2 are arranged, and AC-DC-AC converters are respectively adopted in the UPS main machine cabinet 1 and the UPS bypass cabinet 2;
2) the power output end of the UPS main cabinet 1 is connected with a load through a static switch, and the other input end of the static switch is connected with the output end of a bypass change-over switch QF2 in the UPS bypass cabinet 2 through a main machine change-over switch Q2 to form an automatic bypass; the power output end of the UPS bypass cabinet 2 is connected with the input end of the bypass switch QF2, the power output end of the UPS bypass cabinet 2 is connected with the input end of a second dimension modification bypass switch QX2 through a first dimension modification bypass switch QX1, and the output end of the second dimension modification bypass switch QX2 is connected with a load to form a UPS maintenance bypass;
3) the switch component for controlling the UPS maintenance bypass and the automatic bypass is arranged in the UPS bypass cabinet 2, when the UPS main cabinet 1 is regularly maintained or maintained and the UPS maintenance bypass supplies power to a load, the first maintenance bypass switch QX1 and the second maintenance bypass switch QX2 are manually switched on and off, the electrified part is avoided when the UPS main cabinet 1 is powered off and maintained, the maintenance state of the uncharged part of the UPS main cabinet 1 under the normal power supply condition of the UPS bypass cabinet 2 is formed, and the UPS main cabinet 1 completes maintenance under the uncharged condition.
Further, when the UPS main machine cabinet is maintained in a power failure mode, the changeover switch Q2 for supplying power to the bypass power supply main machine cabinet for the UPS main machine is disconnected, the changeover switch QF2 for the UPS bypass machine cabinet 1 connected to the bypass power supply 2 is disconnected, the UPS main machine cabinet is stopped, and the first maintenance bypass switch QX1 and the second maintenance bypass switch QX2 are switched on.
Further, when the UPS main cabinet 1 is about to be repaired after the UPS main cabinet 1 fails and stops operating, the external ac power supply of the UPS main cabinet 1 is cut off, then the bypass change-over switch QF2 is cut off to cut off the connection relationship between the UPS bypass cabinet 2 and the UPS main cabinet 1, and the power output end of the UPS bypass cabinet 2 is directly connected to the load through the first maintenance bypass switch QX1 and the second maintenance bypass switch QX2, that is, the power is supplied to the load through the UPS maintenance bypass.
Further, when the UPS main cabinet 1 is abnormal, the three-phase fully-controlled bridge rectifier stops working, and the UPS is supplied with power by the automatic bypass; through the automatic control of the static switch module, the load can be supplied with power by the inverter or the automatic bypass power supply; under normal conditions, the load is supplied by the inverter, and the static switch on the side of the inverter is closed at the moment; the UPS automatic bypass is in a standby state and follows the working state of the host.
In practical application, when the UPS main machine cabinet is powered off for maintenance, the UPS main machine is powered on and disconnected with the switch Q2 in the bypass power supply main machine cabinet, the UPS main machine is powered on and disconnected with the switch QF2 in the bypass power supply bypass cabinet, the UPS main machine cabinet is stopped, and the first maintenance bypass switch QX1 and the second maintenance bypass switch QX2 are switched on. After the wiring terminal block is installed on the bypass cabinet, no live part exists in the UPS main machine cabinet 1 during power failure maintenance, the UPS main machine cabinet works under the condition that the UPS system load does not stop, and no potential safety hazard exists.
When the UPS main machine cabinet is powered off for maintenance, the UPS main machine supplies power to the changeover switch Q2 in the bypass power supply main machine cabinet to be disconnected, the UPS main machine supplies power to the changeover switch QF2 in the bypass power supply bypass cabinet to be disconnected, the UPS main machine cabinet is stopped, and the maintenance bypass switches QX1 and QX2 are switched on. After the wiring terminal block is installed on the bypass cabinet, no live part exists in the UPS main machine cabinet when power is cut off for maintenance, the UPS main machine cabinet works under the condition that the UPS system load does not stop, and no potential safety hazard exists.
The UPS maintenance bypass is used for supplying power to the load when the UPS host machine is maintained regularly or maintained, and the maintenance bypass can be manually switched on or off through the maintenance bypass switch. Through the UPS maintenance bypass, after the UPS main machine is shut down, the load is directly connected to the bypass power supply through the maintenance bypass switches QX1 and QX 2.
The utility model discloses mainly be under the circumstances that generator important load does not have a power failure, by the power supply of UPS bypass system, when the host computer is maintained, improve maintainer safety in operation, solved the problem that the maintainer that prior art exists probably arouses the electric shock.
Claims (4)
1. The utility model provides a structure that is used for UPS host computer system to have no electrified maintenance which characterized in that: the UPS comprises a UPS main cabinet (1) and a UPS bypass cabinet (2), wherein an AC-DC-AC converter is adopted in each of the UPS main cabinet (1) and the UPS bypass cabinet (2); a static switch is arranged in the UPS main cabinet (1), and is provided with two input ends and one output end, wherein one input end is connected with the power output end of the UPS main cabinet (1), and the other input end is connected with the output end of a bypass change-over switch QF2 in the UPS bypass cabinet (2) through a host change-over switch Q2 to form an automatic bypass; the output end of the static switch is connected with a load through one of the load switches; a bypass change-over switch QF2 and a first dimension modification bypass switch QX1 are arranged in the UPS bypass cabinet (2), the input end of the bypass change-over switch QF2 is connected with the power output end of the UPS bypass cabinet (2) through a wiring terminal row, the input end of the first dimension modification bypass switch QX1 is connected with the power output end of the UPS bypass cabinet (2), and the output end is connected with a load through a second dimension modification bypass switch QX2 to form a UPS maintenance bypass; by arranging the bypass change-over switch QF2 and modifying the bypass switch QX1 in the first dimension, a UPS main cabinet (1) electroless maintenance switching structure is formed.
2. The structure of claim 1, wherein the structure is configured to enable live maintenance of the UPS host system, and further comprising: a storage battery is arranged in the UPS main cabinet (1).
3. The structure of claim 2, wherein the structure is used for live-free maintenance of the UPS host system, and comprises: the first-stage conversion AC-DC adopts a three-phase fully-controlled bridge rectifier to convert the three-phase alternating-current input voltage into stable direct-current bus voltage; the main power of the second-stage conversion DC-AC inverter adopts a high-power transistor as an inversion element thereof to invert the DC bus voltage to AC voltage.
4. A structure for live overhaul of a UPS host system according to any one of claims 1 to 3, wherein: the UPS bypass cabinet is characterized in that a wiring terminal block is arranged in the UPS bypass cabinet (2), a power output end of the UPS bypass cabinet (2) is arranged on the wiring terminal block, and the power output end of the UPS bypass cabinet (2) is connected with a bypass change-over switch QF2 and a first dimension modification bypass switch QX1 through the wiring terminal block, so that a UPS main cabinet (1) electroless maintenance switching loop is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021198661.7U CN212676943U (en) | 2020-06-25 | 2020-06-25 | Structure for live-line-free maintenance of UPS (uninterrupted Power supply) host system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021198661.7U CN212676943U (en) | 2020-06-25 | 2020-06-25 | Structure for live-line-free maintenance of UPS (uninterrupted Power supply) host system |
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| CN212676943U true CN212676943U (en) | 2021-03-09 |
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| CN202021198661.7U Active CN212676943U (en) | 2020-06-25 | 2020-06-25 | Structure for live-line-free maintenance of UPS (uninterrupted Power supply) host system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113131605A (en) * | 2021-05-01 | 2021-07-16 | 大庆华凯石油化工设计工程有限公司 | Power distribution system for carrying out double-loop power supply with maintenance bypass on maintenance-free bypass single-power-supply UPS |
| CN114336941A (en) * | 2021-12-31 | 2022-04-12 | 合肥联信电源有限公司 | Electric power uninterrupted power source with replaceable host cabinet body |
-
2020
- 2020-06-25 CN CN202021198661.7U patent/CN212676943U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113131605A (en) * | 2021-05-01 | 2021-07-16 | 大庆华凯石油化工设计工程有限公司 | Power distribution system for carrying out double-loop power supply with maintenance bypass on maintenance-free bypass single-power-supply UPS |
| CN114336941A (en) * | 2021-12-31 | 2022-04-12 | 合肥联信电源有限公司 | Electric power uninterrupted power source with replaceable host cabinet body |
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