CN106300631A - UPS online hot backup switching device and switching method for realizing independent power supply and complete power failure - Google Patents
UPS online hot backup switching device and switching method for realizing independent power supply and complete power failure Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本发明涉及实现单独供电、完全停电的UPS在线热备份切换装置及切换方法，切换装置通过线路连接于主机UPS1与备机UPS2之间，包括切换电路、负载电路及负载外旁路供电系统，主机UPS1和备机UPS2分别由上级供电系统供电，备机UPS2的输出端通过两个切换开关与主机UPS1的静态旁路输入端相连，切换电路连接在主机UPS1的供电电路和负载电路之间，并与主机UPS1和备机UPS2的连接电路交汇，交汇点前后分别设有切换开关。当两台UPS必须均置于旁路输出状态下才允许切换，两台UPS均置于逆变输出或一台UPS置于逆变输出另一台置于旁路输出均不允许切换。本发明投资少，在提高UPS输出电源的稳定性及可靠性前提下合理切换。为UPS定期保养维护、单台或两台UPS设备停机故障处理期间不影响负载设备的供电提供了解决方案。
The present invention relates to UPS online hot backup switching device and switching method for realizing separate power supply and complete power failure. UPS1 and backup UPS2 are powered by the upper power supply system respectively. The output terminal of backup UPS2 is connected to the static bypass input terminal of main UPS1 through two switchover switches. The switching circuit is connected between the power supply circuit and load circuit of main UPS1, and Intersect with the connecting circuit of the host UPS1 and the standby UPS2, and there are switches before and after the intersection. Switching is allowed only when both UPSs are placed in the bypass output state, and switching is not allowed if both UPSs are placed in the inverter output or one UPS is placed in the inverter output and the other is placed in the bypass output state. The invention requires less investment and can switch reasonably under the premise of improving the stability and reliability of the output power of the UPS. It provides a solution for UPS regular maintenance, single or two UPS equipment downtime troubleshooting without affecting the power supply of load equipment.
Description
技术领域technical field
本发明涉及电气设备领域，特别涉及实现单独供电、完全停电的UPS在线热备份切换装置及切换方法。The invention relates to the field of electrical equipment, in particular to a UPS online hot backup switching device and a switching method for realizing separate power supply and complete power failure.
背景技术Background technique
UPS在线热备份是由一台UPS的逆变输出作为另一台UPS静态旁路输入的备份，即：如果主UPS故障，静态开关将负载转到备机UPS的逆变器输出回路上，不仅不会中断供电，而且保证UPS输出电源电压为逆变输出电压。因此，这种配置可有效地提高UPS供电负载电源的稳定性及可靠性。应用这种配置，如果主UPS或备机UPS出现故障需维修时，无法切换到另一台运行正常UPS单独为负载供电。由于两台UPS之间存在“热备份”形式的连接，处理故障UPS时，可能影响到正常工作的UPS，严重时将影响负载的供电。采用这种配置的负载一般为重要负载，可能无法停电，在对UPS检修时，只能切换至维修旁路，在此期间负载供电为市电，由于电压不稳定，可能导致负载电源烧损等次生事故。由于UPS只能切换至维修旁路无法实现完全停电，存在无法对UPS实现完全停电检修的问题，如需完全检修部分检修作业必须带电进行、甚至需停负载进行。UPS online hot backup uses the inverter output of one UPS as the backup of the static bypass input of another UPS, that is, if the main UPS fails, the static switch will transfer the load to the inverter output circuit of the standby UPS, not only The power supply will not be interrupted, and the UPS output power supply voltage is guaranteed to be the inverter output voltage. Therefore, this configuration can effectively improve the stability and reliability of the load power supplied by the UPS. With this configuration, if the main UPS or backup UPS fails and needs to be repaired, it cannot be switched to another normal UPS to supply power to the load alone. Since there is a "hot backup" connection between the two UPSs, when dealing with a faulty UPS, it may affect the normal working UPS, and in severe cases, it will affect the power supply of the load. The load using this configuration is generally an important load, and may not be able to cut off the power. When the UPS is overhauled, it can only be switched to the maintenance bypass. During this period, the load is powered by the mains. Due to the unstable voltage, it may cause the load power supply to burn out, etc. secondary accident. Since the UPS can only be switched to the maintenance bypass and cannot achieve a complete power outage, there is a problem that the UPS cannot be completely powered off for maintenance. If a complete maintenance is required, some maintenance operations must be carried out with power on, or even with the load off.
发明内容Contents of the invention
本发明所要解决的技术问题是提供实现单独供电、完全停电的UPS在线热备份切换装置。克服了UPS在线热备份技术存在的单独一台UPS无法为负载供电、检修风险大的弊端，进一步提升在线热备份技术供电的稳定性及可靠性。The technical problem to be solved by the present invention is to provide a UPS online hot backup switching device that realizes separate power supply and complete power failure. It overcomes the shortcomings of UPS online hot backup technology that a single UPS cannot supply power to the load and has high maintenance risks, and further improves the stability and reliability of online hot backup technology power supply.
为实现上述目的，本发明采用以下技术方案实现：To achieve the above object, the present invention adopts the following technical solutions:
实现单独供电、完全停电的UPS在线热备份切换装置，切换装置通过线路连接于主机UPS1与备机UPS2之间；包括切换电路、负载电路及负载外旁路供电系统，主机UPS1和备机UPS2分别由上级供电系统供电，其输入端分别设置输入开关Q1和输入开关Q3，主机UPS1输出端连接负载电路，并设有输出开关Q2，备机UPS2的输出端与主机UPS1的静态旁路输入端相连，并设有切换开关Q4和切换开关Q5，切换电路连接在主机UPS1的供电电路和负载电路之间，并与主机UPS1和备机UPS2的连接电路交汇，交汇点前后分别设有切换开关Q6和切换开关Q7，负载外旁路供电系统连接在负载电路上，并设有外旁路输入开关Q8。A UPS online hot backup switching device that realizes separate power supply and complete power failure. The switching device is connected between the main UPS1 and the backup UPS2 through lines; including switching circuits, load circuits and external load bypass power supply systems. The main UPS1 and backup UPS2 are respectively It is powered by the superior power supply system, and its input terminals are respectively equipped with input switch Q1 and input switch Q3, the output terminal of the main unit UPS1 is connected to the load circuit, and is equipped with an output switch Q2, and the output terminal of the backup UPS2 is connected to the static bypass input terminal of the main unit UPS1 , and is provided with a switch Q4 and a switch Q5, the switch circuit is connected between the power supply circuit and the load circuit of the host UPS1, and intersects with the connection circuit of the host UPS1 and the backup UPS2, and there are switch Q6 and switch before and after the intersection. Switching switch Q7, the load external bypass power supply system is connected to the load circuit, and an external bypass input switch Q8 is provided.
所述的上级供电系统及负载外旁路供电系统均配有低压配电柜，低压配电柜分别设有低压柜开关。Both the upper-level power supply system and the external load bypass power supply system are equipped with low-voltage distribution cabinets, and the low-voltage distribution cabinets are respectively equipped with low-voltage cabinet switches.
所述的主机UPS1和备机UPS2正常工作状态下，主机UPS1输入开关Q1、主机UPS1输出开关Q2、备机UPS2输入开关Q3、切换开关Q4和切换开关Q5均为合闸状态，切换开关Q6、切换开关Q7和外旁路输入开关Q8均为分闸状态。Under the normal working state of the main UPS1 and the standby UPS2, the main UPS1 input switch Q1, the main UPS1 output switch Q2, the standby UPS2 input switch Q3, the switch Q4 and the switch Q5 are all in the closing state, and the switch Q6, Both the transfer switch Q7 and the external bypass input switch Q8 are in the OFF state.
所述的主机UPS1和备机UPS2的上级供电系统来自两台不同的变压器，不允许并列运行。The upper-level power supply systems of the main UPS1 and the backup UPS2 come from two different transformers, and parallel operation is not allowed.
UPS在线热备份切换装置的切换方法，当两台UPS必须均置于旁路输出状态下才允许切换，两台UPS均置于逆变输出或一台UPS置于逆变输出另一台置于旁路输出均不允许切换，具体操作如下：The switching method of the UPS online hot backup switching device, when the two UPSs must be placed in the bypass output state, the switching is allowed. Both UPSs are placed in the inverter output or one UPS is placed in the inverter output and the other is placed in the inverter output. The bypass output is not allowed to switch, the specific operation is as follows:
1)主机UPS1故障1) Host UPS1 failure
a.主机UPS1故障时将负载切换至备机UPS2供电：确认主机UPS1处于旁路输出状态，切换电路上切换开关Q7合闸，主机UPS1的输入开关Q1、主机UPS1输出开关Q2、切换开关Q5分闸，主机UPS1关机；a. When the host UPS1 fails, switch the load to the standby UPS2 for power supply: Confirm that the host UPS1 is in the bypass output state, switch the switch Q7 on the switching circuit, and switch on the input switch Q1 of the host UPS1, the output switch Q2 of the host UPS1, and the switch Q5. gate, the host UPS1 shuts down;
b.主机UPS1故障解除恢复为正常工作方式：主机UPS1的输入开关Q1、切换开关Q5合闸；主机UPS1开机，正常后，操作面板关闭逆变器，主机UPS1输出开关Q2合闸，切换开关Q7分闸，操作面板启动主机UPS1逆变器；b. The failure of main unit UPS1 is restored to normal working mode: the input switch Q1 and transfer switch Q5 of main unit UPS1 are closed; main unit UPS1 is turned on, and after normal operation, the operation panel turns off the inverter, main unit UPS1 output switch Q2 is closed, and transfer switch Q7 Open the switch, and the operation panel starts the host UPS1 inverter;
2)备机UPS2故障2) Standby UPS2 failure
a.备机UPS2故障将负载切换至主机UPS1供电：确认UPS2处于旁路输出状态，备机UPS2输入开关Q3、切换开关Q4分闸，切换开关Q6合闸；备机UPS2关机；a. Standby UPS2 fails, switch the load to main UPS1 for power supply: confirm that UPS2 is in bypass output state, standby UPS2 input switch Q3, transfer switch Q4 open, transfer switch Q6 close; standby UPS2 shut down;
b.备机UPS2故障解除恢复为正常工作方式：切换开关Q6分闸，备机UPS2输入开关Q3、切换开关Q4合闸，备机UPS2开机；b. The standby UPS2 fails and returns to the normal working mode: switch Q6 is opened, the standby UPS2 input switch Q3 and switch Q4 are closed, and the standby UPS2 is turned on;
3)主机UPS1和备机UPS2均出现故障3) Both the host UPS1 and backup UPS2 are faulty
a.主机UPS1和备机UPS2均出现故障，负载切换至外旁路供电：确认主机UPS1、备机UPS2均处于旁路输出状态；两台UPS内电池组开关分闸；负载外旁路供电系统低压柜开关、外旁路输入开关Q8合闸，主机UPS1的输入开关Q1、主机UPS1输出开关Q2、备机UPS2输入开关Q3、切换开关Q4、切换开关Q5分闸，两台UPS分别关机；a. The main UPS1 and standby UPS2 are both faulty, and the load is switched to the external bypass power supply: confirm that the main UPS1 and standby UPS2 are both in the bypass output state; the battery pack switches in the two UPSs are off; the load external bypass power supply system The low-voltage cabinet switch and external bypass input switch Q8 are closed, the input switch Q1 of the main UPS1, the output switch Q2 of the main UPS1, the input switch Q3 of the backup UPS2, the transfer switch Q4, and the transfer switch Q5 are opened, and the two UPSs are shut down respectively;
b.主机UPS1和备机UPS2故障解除恢复为正常工作方式：备机UPS2输入开关Q3、切换开关Q4、切换开关Q5合闸，备机UPS2开机，主机UPS1的输入开关Q1合闸，主机UPS1开机，确认两台UPS逆变器均未启动，主机UPS1输出开关Q2合闸，外旁路输入开关Q8、负载外旁路供电系统低压柜开关分闸，操作面板启动主机UPS1逆变器和备机UPS2逆变器。b. The main UPS1 and backup UPS2 fail to return to the normal working mode: the backup UPS2 input switch Q3, transfer switch Q4, transfer switch Q5 are closed, the backup UPS2 is turned on, the input switch Q1 of the main UPS1 is closed, and the main UPS1 is turned on , confirm that the two UPS inverters are not started, the host UPS1 output switch Q2 is closed, the external bypass input switch Q8, and the low-voltage cabinet switch of the load external bypass power supply system are open, and the operation panel starts the host UPS1 inverter and the backup machine UPS2 inverter.
与现有的技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
本发明投资少，在提高UPS输出电源的稳定性及可靠性前提下合理切换。为UPS定期保养维护、单台或两台UPS设备停机故障处理期间不影响负载设备的供电提供了解决方案。当单台UPS故障或维护时，可将负载切换到另一台运行正常的UPS，降低了故障UPS维修或维护的风险，保证了在此期间负载供电仍为逆变器输出电源。当两台UPS同时故障时，增设了外旁路切换功能，可将两台UPS从在线热备份配置中脱离，实现外旁路直接给负载供电。此外，该切换装置能够实现在线热备份配置的两台UPS完全停电检修或维护。The invention requires less investment and can switch reasonably under the premise of improving the stability and reliability of the output power of the UPS. It provides a solution for UPS regular maintenance, single or two UPS equipment downtime troubleshooting without affecting the power supply of load equipment. When a single UPS fails or is maintained, the load can be switched to another UPS that is operating normally, reducing the risk of repair or maintenance of the faulty UPS and ensuring that the load power supply is still the output power of the inverter during this period. When two UPSs fail at the same time, the external bypass switching function is added to separate the two UPSs from the online hot backup configuration, and the external bypass can directly supply power to the load. In addition, the switching device can realize the complete power failure inspection or maintenance of two UPSs configured with online hot backup.
附图说明Description of drawings
图1为本发明电气原理图。Fig. 1 is the electrical schematic diagram of the present invention.
具体实施方式detailed description
下面结合附图对本发明的具体实施方式进一步说明：The specific embodiment of the present invention is further described below in conjunction with accompanying drawing:
如图1所示，市电1为主机UPS1供电，配有低压开关柜，低压开关柜的开关为W1，市电2为备机UPS2供电，配有低压开关柜，低压开关柜的开关为W2，市电3为负载外旁路供电电源，配有低压开关柜，低压开关柜的开关为W3，市电2和市电3来自同一台变压器，市电1和市电2来自两台变压器，不允许并列运行。As shown in Figure 1, mains 1 supplies power to the host UPS1 and is equipped with a low-voltage switchgear. The switch of the low-voltage switchgear is W1. Mains 2 supplies power to the standby UPS2. Mains 3 is the external load bypass power supply, equipped with a low-voltage switchgear, the switch of the low-voltage switchgear is W3, mains 2 and 3 come from the same transformer, and mains 1 and 2 come from two transformers, Parallel operation is not allowed.
主机UPS1输入端设有输入开关Q1，输出端设有输出开关Q2连接负载电路，备机UPS2的输入端设有输入开关Q3，备机UPS2的输出端与主机UPS1的静态旁路输入端相连，并设有切换开关Q4和切换开关Q5，切换电路连接在主机UPS1的供电电路和负载电路之间，并与主机UPS1和备机UPS2的连接电路交汇，交汇点前设有切换开关Q6，交汇点后设有切换开关Q7，负载外旁路供电系统连接在负载电路上，并设有外旁路输入开关Q8，Q1～Q8均为3P自动开关，负载电路上设有若干2P开关C1～C12连接各个负载。The input end of the host UPS1 is provided with an input switch Q1, the output end is provided with an output switch Q2 connected to the load circuit, the input end of the backup UPS2 is provided with an input switch Q3, and the output end of the backup UPS2 is connected to the static bypass input end of the host UPS1. There is also a switch Q4 and a switch Q5. The switch circuit is connected between the power supply circuit and the load circuit of the host UPS1, and intersects with the connection circuit of the host UPS1 and the standby UPS2. There is a switch Q6 in front of the intersection point. There is a changeover switch Q7 at the back, the load external bypass power supply system is connected to the load circuit, and an external bypass input switch Q8 is provided, Q1～Q8 are all 3P automatic switches, and there are several 2P switches C1～C12 connected to the load circuit individual loads.
主机UPS1和备机UPS2正常工作状态下，主机UPS1输入开关Q1、主机UPS1输出开关Q2、备机UPS2输入开关Q3、切换开关Q4和切换开关Q5均为合闸状态，切换开关Q6、切换开关Q7和外旁路输入开关Q8均为分闸状态。In the normal working state of main UPS1 and standby UPS2, main UPS1 input switch Q1, main UPS1 output switch Q2, standby UPS2 input switch Q3, transfer switch Q4 and transfer switch Q5 are all closed, transfer switch Q6, transfer switch Q7 And the external bypass input switch Q8 is in the off state.
UPS在线热备份切换装置的切换方法，当两台UPS必须均置于旁路输出状态下才允许切换，两台UPS均置于逆变输出或一台UPS置于逆变输出另一台置于旁路输出均不允许切换，具体操作如下：The switching method of the UPS online hot backup switching device, when the two UPSs must be placed in the bypass output state, the switching is allowed. Both UPSs are placed in the inverter output or one UPS is placed in the inverter output and the other is placed in the inverter output. The bypass output is not allowed to switch, the specific operation is as follows:
1.主机UPS1故障1. Host UPS1 failure
a.UPS1故障将负载切换至UPS2供电切换方法：确认UPS1处于旁路输出状态；Q7合闸；Q2、Q1、Q5分闸；UPS1关机。a. UPS1 failure, switch the load to UPS2 power supply switching method: confirm that UPS1 is in bypass output state; Q7 closes; Q2, Q1, Q5 open; UPS1 shuts down.
b.UPS1故障解除，恢复为正常工作方式切换方法：Q1、Q5合闸；UPS1开机，正常后，操作面板关闭逆变器；Q2合闸，Q7分闸，操作面板启动UPS1逆变器。b. The UPS1 fault is removed and it returns to the normal working mode Switching method: switch on Q1 and Q5; switch on UPS1, and turn off the inverter on the operation panel after normal operation; switch on Q2, open the switch on Q7, and start the inverter on the operation panel.
2.备机UPS2故障2. Standby UPS2 failure
a.备机UPS2故障将负载切换至UPS1供电切换方法：确认UPS2处于旁路输出状态；Q3、Q4分闸，Q6合闸；UPS2关机。a. Standby UPS2 failure, switch the load to UPS1 power supply switching method: confirm that UPS2 is in the bypass output state; Q3, Q4 open, Q6 closes; UPS2 shuts down.
b.备机UPS2故障解除，恢复为正常工作方式切换方法：Q6分闸，Q3、Q4合闸；UPS2开机。b. The failure of standby UPS2 is eliminated, and it returns to the normal working mode. Switching method: Q6 opens, Q3 and Q4 close; UPS2 starts.
3.UPS1、UPS2均出现故障3. Both UPS1 and UPS2 are faulty
a.UPS1、UPS2均出现故障,负载切换至外旁路供电切换方法：确认UPS1、UPS2均处于旁路输出状态；两台UPS电池组开关BB分闸；W3，Q8合闸，Q1、Q2、Q3、Q4、Q5分闸；两台UPS分别关机。a. Both UPS1 and UPS2 are faulty, and the load is switched to the external bypass power supply Switching method: Confirm that UPS1 and UPS2 are in the bypass output state; the battery switch BB of the two UPSs is off; W3, Q8 are on, Q1, Q2, Q3, Q4, Q5 switch off; two UPSs shut down respectively.
b.UPS1、UPS2均故障解除，恢复为正常工作方式切换方法：Q3、Q4、Q5合闸；UPS2开机(逆变器不启动)；Q1合闸，UPS1开机(逆变器不启动)；确认两台UPS逆变器均未启动，Q2合闸，Q8、W3分闸；操作面板启动UPS1逆变器；操作面板启动UPS2逆变器。b. The faults of UPS1 and UPS2 are removed and they return to the normal working mode. Switching method: switch on Q3, Q4, Q5; switch on UPS2 (inverter does not start); switch on Q1, switch on UPS1 (inverter does not start); confirm The two UPS inverters are not started, Q2 is closed, Q8 and W3 are open; the operation panel starts the UPS1 inverter; the operation panel starts the UPS2 inverter.
上面所述仅是本发明的基本原理，并非对本发明作任何限制，凡是依据本发明对其进行等同变化和修饰，均在本专利技术保护方案的范畴之内。The above is only the basic principle of the present invention, and does not limit the present invention in any way. All equivalent changes and modifications according to the present invention are within the scope of the technical protection scheme of this patent.
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