Modular UPS and working method of modular UPS

1. A method for operating a modular uninterruptible power supply (UPS), wherein the method comprises:

obtaining working parameters of the modular UPS, wherein the working parameters comprise an input voltage parameter, a load parameter, and a battery parameter;

determining whether the input voltage parameter meets a preset threshold, wherein the input voltage parameter comprises a voltage amplitude and a voltage frequency;

based on at least one of the voltage amplitude or the voltage frequency not meeting the preset threshold, adjusting working modes of S power modules of K power modules in the modular UPS to a battery power supply mode such that an output of the modular UPS satisfies a power requirement of a load, wherein K is a total quantity of the power modules in the modular UPS, and 1≤S<K;

determining whether one or more remaining power modules other than one or more power modules that provide power for the load exist in the modular UPS; and

based on one or more remaining power modules existing in the modular UPS, executing at least one of the following steps:

determining whether the battery parameter is less than a first threshold, wherein the battery parameter comprises a remaining battery capacity; and based on the remaining battery capacity being less than the first threshold, adjusting a working mode of at least one power module of the one or more remaining power modules to a charging mode; or

determining whether the load parameter is less than a second threshold, wherein the load parameter comprises a load capacity; and based on the load capacity being less than the second threshold, adjusting a working mode of at least one power module of the one or more remaining power modules to a feedback mode; or

determining whether an output load type indicated by the load parameter is an energy feedback load, wherein the load parameter comprises the output load type; and based on the output load type being the energy feedback load, adjusting a working mode of at least one power module of the one or more remaining power modules to a feedback mode or a charging mode.

2. The method according to claim 1 , wherein the power modules in the modular UPS are initially in a mains power supply mode, and the method further comprises:

based on the voltage amplitude and the voltage frequency being restored to meet the preset threshold, adjusting a power module in the battery power supply mode to be in the mains power supply mode; or

based on the remaining battery capacity being restored to be not less than the first threshold, adjusting a power module in the charging mode to be in the mains power supply mode; or

based on the load capacity being changed to be not less than the second threshold, adjusting a power module in the feedback mode to be in the mains power supply mode.

3. The method according to claim 1 , wherein the method further comprises:

based on no remaining power module existing in the modular UPS, and the voltage amplitude and the voltage frequency being restored to meet the preset threshold, executing at least one of the following steps:

determining whether the remaining battery capacity is less than the first threshold, and based on the remaining battery capacity being less than the first threshold, adjusting a working mode of at least one power module from the battery power supply mode to the charging mode; or

determining whether the load capacity is less than the second threshold, and based on the load capacity being less than the second threshold, adjusting a working mode of at least one power module from the battery power supply mode to the feedback mode; or

determining whether the output load type indicated by the load parameter is an energy feedback load, and based on the output load type being the energy feedback load, adjusting a working mode of at least one power module from the battery power supply mode to the feedback mode or the charging mode.

4. A method for operating a modular uninterruptible power supply (UPS), wherein the method comprises:

obtaining working parameters of the modular UPS, wherein the working parameters comprise an input voltage parameter, a load parameter, and a battery parameter; and

adjusting a working mode of at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS such that not all power modules of the modular UPS are in a same working mode, wherein the modular UPS comprises K power modules, and 2≤K.

5. The method according to claim 4 , wherein adjusting the working mode of the at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS comprises:

determining whether the input voltage parameter meets a preset threshold, wherein the input voltage parameter comprises a voltage amplitude and a voltage frequency; and

based on at least one of the voltage amplitude or the voltage frequency not meeting the preset threshold, adjusting working modes of L power modules of the K power modules in the modular UPS to a battery power supply mode, wherein K is a total quantity of the power modules in the modular UPS, and 1≤L<K.

6. The method according to claim 4 , wherein adjusting the working mode of the at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS comprises:

determining whether the battery parameter is less than a first threshold, wherein the battery parameter comprises a remaining battery capacity; and

based on the remaining battery capacity being less than the first threshold, adjusting working modes of P power modules of the K power modules in the modular UPS to a charging mode, wherein K is a total quantity of the power modules in the modular UPS, and 1≤P<K.

7. The method according to claim 4 , wherein adjusting the working mode of the at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS comprises:

determining whether the load parameter is less than a second threshold, wherein the load parameter comprises a load capacity; and

based on the load capacity being less than the second threshold, adjusting working modes of Q power modules of the K power modules in the modular UPS to a feedback mode, wherein K is a total quantity of the power modules in the modular UPS, and 1≤Q<K.

8. The method according to claim 4 , wherein adjusting the working mode of the at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS comprises:

determining whether an output load type indicated by the load parameter is an energy feedback load, wherein the load parameter comprises the output load type, and based on the output load type being the energy feedback load, adjusting working modes of R power modules of the K power modules in the modular UPS to a feedback mode or a charging mode, wherein K is a total quantity of the power modules in the modular UPS, and 1≤R<K.

9. The method according to claim 4 , wherein working modes for power supplies of the modular UPS comprise a battery power supply mode, a mains power supply mode, a feedback mode, and a charging mode.

10. A modular uninterruptible power supply (UPS), comprising:

power modules;

a bypass module; and

a control module, wherein the control module is connected to the power modules and the bypass module;

wherein the control module is configured to:

obtain working parameters of the modular UPS, wherein the working parameters comprise an input voltage parameter, a load parameter, and a battery parameter;

determine whether the input voltage parameter meets a preset threshold, wherein the input voltage parameter comprises a voltage amplitude and a voltage frequency;

based on at least one of the voltage amplitude or the voltage frequency not meeting the preset threshold, adjust working modes of S power modules of K power modules in the modular UPS to a battery power supply mode such that output of the modular UPS satisfies a power requirement of a load, wherein K is a total quantity of the power modules in the modular UPS, and 1≤S<K;

determine whether one or more remaining power modules other than one or more power modules that provide power for the load exist in the modular UPS; and

based on one or more remaining power modules existing in the modular UPS, execute at least one of the following steps:

determining whether the battery parameter is less than a first threshold, wherein the battery parameter comprises a remaining battery capacity; and based on the remaining battery capacity being less than the first threshold, adjusting a working mode of at least one power module of the one or more remaining power modules to a charging mode; or

determining whether the load parameter is less than a second threshold, wherein the load parameter comprises a load capacity; and based on the load capacity being less than the second threshold, adjusting a working mode of at least one power module of the one or more remaining power modules to a feedback mode; or

determining whether an output load type indicated by the load parameter is an energy feedback load, wherein the load parameter comprises the output load type; and based on the output load type being the energy feedback load, adjusting a working mode of at least one power module of the one or more remaining power modules to a feedback mode or a charging mode.

11. The modular UPS according to claim 10 , wherein the power modules in the modular UPS are configured to initially be in a mains power supply mode, and the control module is further configured to:

based on the voltage amplitude and the voltage frequency being restored to meet the preset threshold, adjust a power module in the battery power supply mode to be in the mains power supply mode; or

based on the remaining battery capacity being restored to be not less than the first threshold, adjust a power module in the charging mode to be in the mains power supply mode; or

based on the load capacity being changed to be not less than the second threshold, adjust a power module in the feedback mode to be in the mains power supply mode.

12. The modular UPS according to claim 10 , wherein the control module is further configured to:

based on no remaining power module existing in the modular UPS, and the voltage amplitude and the voltage frequency being restored to meet the preset threshold, execute at least one of the following steps:

determining whether the remaining battery capacity is less than the first threshold, and based on the remaining battery capacity being less than the first threshold, adjusting a working mode of at least one power module from the battery power supply mode to the charging mode; or

determining whether the load capacity is less than the second threshold, and based on the load capacity being less than the second threshold, adjusting a working mode of at least one power module from the battery power supply mode to the feedback mode; or

determining whether the output load type indicated by the load parameter is an energy feedback load, and based on the output load type being the energy feedback load, adjusting a working mode of at least one power module from the battery power supply mode to the feedback mode or the charging mode.

13. A modular uninterruptible power supply (UPS), comprising:

power modules;

a bypass module; and

a control module, wherein the control module is connected to the power modules and the bypass module;

wherein the control module is configured to:

obtain working parameters of the modular UPS, wherein the working parameters comprise an input voltage parameter, a load parameter, and a battery parameter; and

adjust a working mode of at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS such that not all power modules of the modular UPS are in a same working mode, wherein the modular UPS comprises K power modules, and 2≤K.

14. The modular UPS according to claim 13 , wherein adjusting the working mode of the at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS comprises:

determining whether the input voltage parameter meets a preset threshold, wherein the input voltage parameter comprises a voltage amplitude and a voltage frequency; and

based on at least one of the voltage amplitude or the voltage frequency not meeting the preset threshold, adjusting working modes of L power modules of the K power modules in the modular UPS to a battery power supply mode, wherein K is a total quantity of the power modules in the modular UPS, and 1≤L<K.

15. The modular UPS according to claim 13 , wherein adjusting the working mode of the at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS comprises:

determining whether the battery parameter is less than a first threshold, wherein the battery parameter comprises a remaining battery capacity; and

based on the remaining battery capacity being less than the first threshold, adjusting working modes of P power modules of the K power modules in the modular UPS to a charging mode, wherein K is a total quantity of the power modules in the modular UPS, and 1≤P<K.

16. The modular UPS according to claim 13 , wherein adjusting the working mode of the at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS comprises:

determining whether the load parameter is less than a second threshold, wherein the load parameter comprises a load capacity; and

based on the load capacity being less than the second threshold, adjusting working modes of Q power modules of the K power modules in the modular UPS to a feedback mode, wherein K is a total quantity of the power modules in the modular UPS, and 1≤Q<K.

17. The modular UPS according to claim 13 , wherein adjusting the working mode of the at least one power module in the modular UPS according to at least one of the working parameters of the modular UPS comprises:

determining whether an output load type indicated by the load parameter is an energy feedback load, wherein the load parameter comprises the output load type; and

based on the output load type being the energy feedback load, adjusting working modes of R power modules of the K power modules in the modular UPS to a feedback mode or a charging mode, wherein K is a total quantity of the power modules in the modular UPS, and 1≤R<K.

18. The modular UPS according to claim 13 , wherein working modes for power supplies of the modular UPS comprise a battery power supply mode, a mains power supply mode, a feedback mode, and a charging mode.