CN112737090A - Parallel operation UPS system control method - Google Patents
Parallel operation UPS system control method Download PDFInfo
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- CN112737090A CN112737090A CN202011580611.XA CN202011580611A CN112737090A CN 112737090 A CN112737090 A CN 112737090A CN 202011580611 A CN202011580611 A CN 202011580611A CN 112737090 A CN112737090 A CN 112737090A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
Abstract
The invention provides a parallel operation UPS system control method, which comprises the following steps: detecting the state of the mains supply and the state of the inverter of the local machine in real time; if the mains supply voltage of the machine is normal, the inverter of the machine is normal, the mains supply voltage of the parallel UPS is normal, and the parallel inverter is normal, controlling the machine to work in a first mode; in a first mode, the mains supply of the parallel machine is used for charging the battery pack and supplying power to the load through the inverter of the local machine, and the mains supply of the parallel machine is used for charging the battery pack and supplying power to the load through the inverter of the parallel machine; if the mains supply voltage of the machine is normal, the inverter of the machine is normal, the mains supply voltage of the parallel UPS is abnormal, and the parallel inverter is normal, controlling the machine to work in a second mode; in the second mode, the local commercial power is used for charging the battery pack, supplying power to the load through the local inverter and supplying power to the load through the parallel inverter. The parallel operation UPS system control method provided by the invention can effectively improve the reliability of the parallel operation UPS system.
Description
Technical Field
The invention belongs to the technical field of UPS, and particularly relates to a parallel UPS system control method.
Background
A UPS (Uninterruptible Power System) is a System device that connects an energy storage unit (e.g., a battery pack) to a host and converts dc Power into commercial Power through an inverter of the host, and is mainly used to provide stable and uninterrupted Power supply to a load such as a single computer, a computer network System, or other Power devices, and therefore how to improve the reliability of the UPS becomes an urgent problem to be solved in the art.
In the prior art, in order to improve the reliability of the UPS system, a control scheme of parallel redundancy of two UPSs is generally adopted. The specific control scheme is as follows: when the two UPSs are normally operated, the two UPSs jointly supply power to the load; when the commercial power of one UPS is abnormal, the UPS is turned off, and the normally running UPS is used for independently supplying power to the load. However, the existing control schemes have the following drawbacks:
1) when the commercial power of one UPS is abnormal, the UPS is turned off, so that the reliability of the current UPS system is reduced;
2) on the premise of 1), if the second UPS is also failed, the second UPS needs to be shut down, and the first UPS is restarted, and at this time, a certain time is required for restarting the first UPS, which may also reduce the reliability of the current UPS system.
Disclosure of Invention
The invention aims to provide a parallel operation UPS system control method to solve the technical problem of low reliability of a UPS system in the prior art.
In order to achieve the above object, the technical solution adopted by the present invention is to provide a method for controlling a parallel operation UPS system, where the method for controlling a parallel operation UPS system is applied to a target UPS in a parallel operation UPS system, the parallel operation UPS system includes the target UPS and the parallel operation UPS, the target UPS and the parallel operation UPS are connected to a same battery pack, and the target UPS and the parallel operation UPS are connected in communication;
the parallel operation UPS system control method comprises the following steps:
detecting the mains voltage of a local machine and the voltage of the output side of an inverter of the local machine in real time;
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are not received, controlling the local machine to work in a first mode; in the first mode, local commercial power is used for charging the battery pack and supplying power to a load through a local inverter, and parallel commercial power is used for charging the battery pack and supplying power to the load through a parallel inverter;
the first fault signal is a signal sent by the parallel operation UPS to the target UPS when the mains voltage of the parallel operation exceeds a preset first voltage range; the second fault signal is a signal sent by the parallel operation UPS to the target UPS when the voltage of the output side of the parallel operation inverter exceeds a preset second voltage range;
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, a first fault signal sent by the parallel operation UPS is received, and a second fault signal sent by the parallel operation UPS is not received, controlling the local machine to work in a second mode; in the second mode, local commercial power is used for supplying power to the battery pack, the load through the local inverter and the load through the parallel inverter.
Optionally, the parallel UPS system control method further includes:
if the mains voltage of the local machine exceeds a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are not received, controlling the local machine to work in a third mode;
in the third mode, the parallel operation commercial power is used for charging the battery pack, supplying power to the load through the parallel operation inverter and supplying power to the load through the local inverter.
Optionally, the parallel UPS system control method further includes:
if the mains voltage of the local machine exceeds a preset first voltage range, the output side voltage of the local machine inverter does not exceed a preset second voltage range, a first fault signal sent by the parallel operation UPS is received, and a second fault signal sent by the parallel operation UPS is not received, controlling the local machine to work in a fourth mode;
wherein, in the fourth mode, the battery pack supplies power to the load through the local inverter and supplies power to the load through the parallel inverter.
Optionally, the parallel UPS system control method further includes:
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, a first fault signal sent by the parallel operation UPS is not received, and a second fault signal sent by the parallel operation UPS is received, controlling the local machine to work in a fifth mode;
in the fifth mode, the local commercial power is used for charging the battery pack and supplying power to the load through the local inverter, and the parallel commercial power is used for charging the battery pack.
Optionally, the parallel UPS system control method further includes:
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter exceeds a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are not received, controlling the local machine to work in a sixth mode;
in the sixth mode, the commercial power of the parallel machine is used for charging the battery pack, and the commercial power of the parallel machine is used for charging the battery pack and supplying power to a load through the parallel machine inverter.
Optionally, the parallel UPS system control method further includes:
if the mains voltage of the local machine does not exceed a preset first voltage range, the output side voltage of the local machine inverter exceeds a preset second voltage range, a first fault signal sent by the parallel operation UPS is received, and a second fault signal sent by the parallel operation UPS is not received, controlling the local machine to work in a seventh mode;
in the seventh mode, the local commercial power is used for supplying power to the battery pack and supplying power to the load through the parallel inverter.
Optionally, the parallel UPS system control method further includes:
if the mains voltage of the local machine exceeds a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, a first fault signal sent by the parallel operation UPS is not received, and a second fault signal sent by the parallel operation UPS is received, controlling the local machine to work in an eighth mode;
in the eighth mode, the parallel operation commercial power is used for charging the battery pack and supplying power to a load through the local inverter.
Optionally, the parallel UPS system control method further includes:
and if the mains voltage of the local machine exceeds a preset first voltage range and the output side voltage of the local machine inverter exceeds a preset second voltage range, controlling the local machine to be switched off.
Optionally, the parallel UPS system control method further includes:
if the mains voltage of the local machine exceeds a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are received, controlling the local machine to work in a ninth mode;
wherein in the ninth mode the battery pack supplies power to a load through a local inverter.
Optionally, the parallel UPS system control method further includes:
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are received, controlling the local machine to work in a tenth mode;
in the tenth mode, the local commercial power is used for charging the battery pack and supplying power to the load through the local inverter, and the parallel operation UPS is turned off.
The parallel UPS system control method provided by the invention has the beneficial effects that:
the UPS and the parallel UPS are designed to jointly charge the battery pack when the mains supply of the target UPS and the parallel UPS is normal, and when the mains supply of one UPS is abnormal, the UPS with the normal mains supply is designed to charge the battery pack and simultaneously supply power to a load through the inverter of the UPS with the abnormal mains supply. In other words, different from the scheme of directly turning off the UPS with the abnormal mains supply and taking the UPS with the abnormal mains supply off the line in the prior art, the control method of the parallel operation UPS system provided by the invention can ensure that each UPS on the parallel operation UPS system is in the online state as much as possible, thereby improving the reliability of the parallel operation UPS system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a parallel UPS system according to an embodiment of the present invention;
fig. 2 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention;
fig. 3 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention;
fig. 4 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention;
fig. 5 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention;
fig. 6 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention;
fig. 7 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention;
fig. 8 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention;
fig. 9 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention;
fig. 10 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention;
fig. 11 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a parallel UPS system according to an embodiment of the present invention, the parallel UPS system control method is applied to a target UPS in the parallel UPS system, the parallel UPS system includes the target UPS and the parallel UPS, the target UPS and the parallel UPS are connected to a same battery pack, and the target UPS and the parallel UPS are communicatively connected.
In fig. 1 to 11, the UPS1 is a target UPS, the UPS2 is a parallel UPS, AC/DC denotes a rectifier, DC/AC denotes an inverter, DC/DC denotes a DC-DC converter, and a dotted line with an arrow in fig. 2 to 11 denotes a signal flow direction.
Referring to fig. 2, fig. 2 is a signal flow diagram illustrating a parallel UPS system control method according to an embodiment of the present invention, where the parallel UPS system control method is applied to a target UPS in a parallel UPS system.
In the parallel UPS system, one UPS is a target UPS, and the other UPS is a parallel UPS, that is, the method for controlling the parallel UPS system provided by the present invention is applied to any UPS in the parallel UPS system.
The parallel UPS system control method comprises the following steps (taking a target UPS as an example, the local UPS is the target UPS):
and detecting the mains voltage of the local machine and the output side voltage of the local machine inverter in real time.
And if the mains voltage of the local machine does not exceed a preset first voltage range, the output side voltage of the local machine inverter does not exceed a preset second voltage range and a first fault signal and a second fault signal sent by the parallel machine UPS are not received, controlling the local machine to work in a first mode. In the first mode, the local commercial power is used for charging the battery pack and supplying power to the load through the local inverter, and the parallel commercial power is used for charging the battery pack and supplying power to the load through the parallel inverter.
The first fault signal is a signal sent by the parallel operation UPS to the target UPS when the mains voltage of the parallel operation exceeds a preset first voltage range. The second fault signal is a signal sent by the parallel operation UPS to the target UPS when the voltage of the output side of the parallel operation inverter exceeds a preset second voltage range.
In this embodiment, the target UPS receives a fault signal sent by the parallel UPS, in addition to detecting the local utility voltage and the output-side voltage of the local inverter in real time.
The purpose of detecting the mains voltage of the local machine in real time by the target UPS is to judge the mains state of the local machine according to the mains voltage of the local machine, if the mains voltage of the local machine does not exceed a preset first voltage range, the mains voltage of the local machine is normal, and if the mains voltage of the local machine exceeds the preset first voltage range, the mains voltage of the local machine is abnormal.
The purpose of detecting the output side voltage of the local inverter in real time by the target UPS is to judge the state of the local inverter according to the output side voltage of the local inverter, if the output side voltage of the local inverter does not exceed a preset second voltage range, the local inverter is normal, and if the output side voltage of the local inverter exceeds the preset second voltage range, the local inverter is in failure. Similarly, the parallel operation UPS also detects the state of the parallel operation mains supply and the state of the parallel operation inverter in real time, and sends a corresponding fault signal according to the detection result.
In the embodiment, referring to fig. 2, if the local utility power is normal, the local inverter is normal, the parallel utility power is normal, and the parallel inverter is normal, the battery pack is charged by the target UPS and the parallel UPS together.
And if the mains voltage of the local machine does not exceed the preset first voltage range, the output side voltage of the local machine inverter does not exceed the preset second voltage range, the first fault signal sent by the parallel operation UPS is received, and the second fault signal sent by the parallel operation UPS is not received, controlling the local machine to work in a second mode. In the second mode, the local commercial power is used for charging the battery pack, supplying power to the load through the local inverter and supplying power to the load through the parallel inverter.
In this embodiment, referring to fig. 3, if the local utility power is normal, the local inverter is normal, the parallel utility power is abnormal, and the parallel inverter is normal, the target UPS charges the battery pack, supplies power to the load based on the local inverter, and also supplies power to the load through the parallel inverter.
In this embodiment, the parallel UPS system control method may further include:
and if the voltage of the output side of the inverter of the local machine exceeds a preset second voltage range, sending a fourth fault signal to the parallel operation UPS, wherein the third fault signal and the fourth fault signal are used for indicating the conversion working mode of the parallel operation UPS. The third fault signal is a first fault signal corresponding to the parallel operation, the fourth fault signal is a second fault signal corresponding to the parallel operation, and the local computer also sends a fault signal to enable the parallel operation UPS to switch the working mode.
Optionally, referring to fig. 4, as a specific implementation of the parallel UPS system control method provided in the present invention, the parallel UPS system control method further includes:
and if the mains voltage of the local machine exceeds a preset first voltage range, the output side voltage of the local machine inverter does not exceed a preset second voltage range and a first fault signal and a second fault signal sent by the parallel machine UPS are not received, controlling the local machine to work in a third mode.
In the third mode, the parallel machine commercial power is used for charging the battery pack, supplying power to the load through the parallel machine inverter and supplying power to the load through the local inverter.
In this embodiment, if the local utility power is abnormal, the local inverter is normal, the parallel utility power is normal, and the parallel inverter is normal, the parallel utility power supplies power to the load through the inverter of the target UPS in addition to charging the battery pack and supplying power to the load through the parallel inverter.
Optionally, referring to fig. 5, as a specific implementation of the parallel UPS system control method provided in the present invention, the parallel UPS system control method further includes:
and if the mains voltage of the local machine exceeds a preset first voltage range, the output side voltage of the local machine inverter does not exceed a preset second voltage range, the first fault signal sent by the parallel operation UPS is received, and the second fault signal sent by the parallel operation UPS is not received, controlling the local machine to work in a fourth mode.
In the fourth mode, the battery pack supplies power to the load through the local inverter and supplies power to the load through the parallel inverter.
In this embodiment, if the local utility power is abnormal, the local inverter is normal, the parallel utility power is abnormal, and the parallel inverter is normal, the battery pack discharges, and the inverter of the two UPSs supplies power to the load.
Optionally, referring to fig. 6, as a specific implementation of the parallel UPS system control method provided in the present invention, the parallel UPS system control method further includes:
and if the mains voltage of the local machine does not exceed the preset first voltage range, the output side voltage of the local machine inverter does not exceed the preset second voltage range, the first fault signal sent by the parallel operation UPS is not received, and the second fault signal sent by the parallel operation UPS is received, controlling the local machine to work in a fifth mode.
In the fifth mode, the local commercial power is used for charging the battery pack and supplying power to the load through the local inverter, and the parallel commercial power is used for charging the battery pack.
In this embodiment, if the local utility power is normal, the local inverter is normal, the parallel utility power is normal, and the parallel inverter is abnormal, the local and parallel UPSs supply power to the battery pack together, and the local supplies power to the load through the local inverter at the same time.
Optionally, referring to fig. 7, as a specific implementation of the parallel UPS system control method provided in the present invention, the parallel UPS system control method further includes:
and if the mains voltage of the local machine does not exceed the preset first voltage range, the output side voltage of the local machine inverter exceeds the preset second voltage range and the first fault signal and the second fault signal sent by the parallel machine UPS are not received, controlling the local machine to work in a sixth mode.
In the sixth mode, the commercial power of the parallel machine is used for charging the battery pack, and the commercial power of the parallel machine is used for charging the battery pack and supplying power to the load through the parallel machine inverter.
In this embodiment, if the local utility power is normal, the local inverter is abnormal, the parallel utility power is normal, and the parallel inverter is normal, the local and the parallel UPS supply power to the battery pack together, and the parallel UPS also supplies power to the load through the parallel inverter at the same time.
Optionally, referring to fig. 8, as a specific implementation of the parallel UPS system control method provided in the present invention, the parallel UPS system control method further includes:
and if the mains voltage of the local machine does not exceed the preset first voltage range, the output side voltage of the local machine inverter exceeds the preset second voltage range, the first fault signal sent by the parallel machine UPS is received, and the second fault signal sent by the parallel machine UPS is not received, controlling the local machine to work in a seventh mode.
In the seventh mode, the local commercial power is used for charging the battery pack and supplying power to the load through the parallel inverter.
In this embodiment, if the local utility power is normal, the local inverter is abnormal, the parallel utility power is abnormal, and the parallel inverter is normal, the local device charges the battery pack, and the local utility power supplies power to the load through the parallel inverter.
Optionally, referring to fig. 9, as a specific implementation of the parallel UPS system control method provided in the present invention, the parallel UPS system control method further includes:
and if the mains voltage of the local machine exceeds a preset first voltage range, the output side voltage of the local machine inverter does not exceed a preset second voltage range, a first fault signal sent by the parallel operation UPS is not received, and a second fault signal sent by the parallel operation UPS is received, controlling the local machine to work in an eighth mode.
In the eighth mode, the parallel machine commercial power is used for charging the battery pack and supplying power to the load through the local inverter.
In this embodiment, if the local utility power is abnormal, the local inverter is normal, the parallel utility power is normal, and the parallel inverter is abnormal, the parallel power charges the battery pack, and the parallel utility power supplies power to the load through the local inverter.
Optionally, as a specific implementation manner of the parallel UPS system control method provided by the present invention, the parallel UPS system control method further includes:
and if the mains voltage of the local machine exceeds a preset first voltage range and the output side voltage of the local machine inverter exceeds a preset second voltage range, controlling the local machine to be switched off.
In the present embodiment, if the local utility power is abnormal and the local inverter is abnormal, the local utility power is turned off.
Optionally, referring to fig. 10, as a specific implementation of the parallel UPS system control method provided in the present invention, the parallel UPS system control method further includes:
and if the mains voltage of the local machine exceeds a preset first voltage range, the output side voltage of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are received, controlling the local machine to work in a ninth mode.
Wherein, in a ninth mode, the battery pack supplies power to the load through the local inverter.
In the present embodiment, when the local utility power is abnormal, the local inverter is normal, the parallel utility power is abnormal, and the parallel inverter is abnormal, the battery pack is discharged, and power is supplied to the load through the local inverter.
Optionally, referring to fig. 11, as a specific implementation of the parallel UPS system control method provided in the present invention, the parallel UPS system control method further includes:
and if the mains voltage of the local machine does not exceed a preset first voltage range, the output side voltage of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are received, controlling the local machine to work in a tenth mode.
In the tenth mode, the commercial power of the parallel operation UPS is used for charging the battery pack and supplying power to the load through the local inverter, and the parallel operation UPS is turned off.
In this embodiment, if the local utility power is normal, the local inverter is normal, the parallel operation utility power is abnormal, and the parallel operation inverter is abnormal, the parallel operation UPS is turned off, and the target UPS (i.e., the local unit) charges the battery pack and supplies power to the load.
In the above embodiments, the switching of the target UPS operation mode includes switching of a main current of the target UPS or switching of a current direction of the target UPS. The main circuit current of the target UPS refers to a current obtained by the target UPS converting the commercial power (i.e., an output current of the rectifier in fig. 2 to 11). For example, if the target UPS is switched from the first mode to the second mode, the main circuit current of the target UPS needs to be controlled to be increased so as to ensure that the load can be supplied through the parallel inverter while the battery pack is charged and the load is supplied through the local inverter. For example, if the target UPS is switched from the first mode to the third mode, the current direction of the target UPS needs to be controlled (the current direction before switching is from the utility side of the target UPS to the battery pack side, and the current direction after switching is from the battery pack side to the utility side of the target UPS). The conversion of other modes is similar to the above description, and is not described herein again.
Specifically, the adjustment of the main circuit current of the target UPS and the conversion of the current direction of the target UPS can be realized by controlling a switching tube in a rectifier in the target UPS, a switching tube in a DC-DC converter in the target UPS and a switching tube in an inverter in the target UPS.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A parallel operation UPS system control method is applied to a target UPS in a parallel operation UPS system, the parallel operation UPS system comprises the target UPS and the parallel operation UPS, the target UPS is connected with the same battery pack with the parallel operation UPS, and the target UPS is connected with the parallel operation UPS in a communication mode;
the parallel operation UPS system control method comprises the following steps:
detecting the mains voltage of a local machine and the voltage of the output side of an inverter of the local machine in real time;
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are not received, controlling the local machine to work in a first mode; in the first mode, local commercial power is used for charging the battery pack and supplying power to a load through a local inverter, and parallel commercial power is used for charging the battery pack and supplying power to the load through a parallel inverter;
the first fault signal is a signal sent by the parallel operation UPS to the target UPS when the mains voltage of the parallel operation exceeds a preset first voltage range; the second fault signal is a signal sent by the parallel operation UPS to the target UPS when the voltage of the output side of the parallel operation inverter exceeds a preset second voltage range;
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, a first fault signal sent by the parallel operation UPS is received, and a second fault signal sent by the parallel operation UPS is not received, controlling the local machine to work in a second mode; in the second mode, local commercial power is used for supplying power to the battery pack, the load through the local inverter and the load through the parallel inverter.
2. The parallel UPS system control method of claim 1, further comprising:
if the mains voltage of the local machine exceeds a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are not received, controlling the local machine to work in a third mode;
in the third mode, the parallel operation commercial power is used for charging the battery pack, supplying power to the load through the parallel operation inverter and supplying power to the load through the local inverter.
3. The parallel UPS system control method of claim 1, further comprising:
if the mains voltage of the local machine exceeds a preset first voltage range, the output side voltage of the local machine inverter does not exceed a preset second voltage range, a first fault signal sent by the parallel operation UPS is received, and a second fault signal sent by the parallel operation UPS is not received, controlling the local machine to work in a fourth mode;
wherein, in the fourth mode, the battery pack supplies power to the load through the local inverter and supplies power to the load through the parallel inverter.
4. The parallel UPS system control method of claim 1, further comprising:
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, a first fault signal sent by the parallel operation UPS is not received, and a second fault signal sent by the parallel operation UPS is received, controlling the local machine to work in a fifth mode;
in the fifth mode, the local commercial power is used for charging the battery pack and supplying power to the load through the local inverter, and the parallel commercial power is used for charging the battery pack.
5. The parallel UPS system control method of claim 1, further comprising:
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter exceeds a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are not received, controlling the local machine to work in a sixth mode;
in the sixth mode, the commercial power of the parallel machine is used for charging the battery pack, and the commercial power of the parallel machine is used for charging the battery pack and supplying power to a load through the parallel machine inverter.
6. The parallel UPS system control method of claim 1, further comprising:
if the mains voltage of the local machine does not exceed a preset first voltage range, the output side voltage of the local machine inverter exceeds a preset second voltage range, a first fault signal sent by the parallel operation UPS is received, and a second fault signal sent by the parallel operation UPS is not received, controlling the local machine to work in a seventh mode;
in the seventh mode, the local commercial power is used for supplying power to the battery pack and supplying power to the load through the parallel inverter.
7. The parallel UPS system control method of claim 1, further comprising:
if the mains voltage of the local machine exceeds a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, a first fault signal sent by the parallel operation UPS is not received, and a second fault signal sent by the parallel operation UPS is received, controlling the local machine to work in an eighth mode;
in the eighth mode, the parallel operation commercial power is used for charging the battery pack and supplying power to a load through the local inverter.
8. The parallel UPS system control method of claim 1, further comprising:
and if the mains voltage of the local machine exceeds a preset first voltage range and the output side voltage of the local machine inverter exceeds a preset second voltage range, controlling the local machine to be switched off.
9. The parallel UPS system control method of claim 1, further comprising:
if the mains voltage of the local machine exceeds a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are received, controlling the local machine to work in a ninth mode;
wherein in the ninth mode the battery pack supplies power to a load through a local inverter.
10. The parallel UPS system control method of claim 1, further comprising:
if the mains voltage of the local machine does not exceed a preset first voltage range, the voltage of the output side of the local machine inverter does not exceed a preset second voltage range, and a first fault signal and a second fault signal sent by the parallel machine UPS are received, controlling the local machine to work in a tenth mode;
in the tenth mode, the local commercial power is used for charging the battery pack and supplying power to the load through the local inverter, and the parallel operation UPS is turned off.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310950278.4A CN117081229A (en) | 2020-12-28 | 2020-12-28 | Building block sharing type parallel operation UPS system sharing battery |
| CN202011580611.XA CN112737090A (en) | 2020-12-28 | 2020-12-28 | Parallel operation UPS system control method |
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| CN202011580611.XA CN112737090A (en) | 2020-12-28 | 2020-12-28 | Parallel operation UPS system control method |
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| CN202310950278.4A Division CN117081229A (en) | 2020-12-28 | 2020-12-28 | Building block sharing type parallel operation UPS system sharing battery |
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| CN112737090A true CN112737090A (en) | 2021-04-30 |
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| CN202011580611.XA Pending CN112737090A (en) | 2020-12-28 | 2020-12-28 | Parallel operation UPS system control method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104065157A (en) * | 2014-06-09 | 2014-09-24 | 深圳微网能源管理系统实验室有限公司 | Uninterruptible power supply with improved power supply reliability |
| CN108923524A (en) * | 2018-07-11 | 2018-11-30 | 佛山市众盈电子有限公司 | A kind of off-line UPS power control system |
| CN109687569A (en) * | 2018-12-11 | 2019-04-26 | 漳州科华技术有限责任公司 | Data center's power supply system |
| CN111799883A (en) * | 2020-06-22 | 2020-10-20 | 深圳科士达科技股份有限公司 | Lithium battery power supply system for supplying power to series connection hot backup uninterrupted power supply |
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2020
- 2020-12-28 CN CN202310950278.4A patent/CN117081229A/en active Pending
- 2020-12-28 CN CN202011580611.XA patent/CN112737090A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065157A (en) * | 2014-06-09 | 2014-09-24 | 深圳微网能源管理系统实验室有限公司 | Uninterruptible power supply with improved power supply reliability |
| CN108923524A (en) * | 2018-07-11 | 2018-11-30 | 佛山市众盈电子有限公司 | A kind of off-line UPS power control system |
| CN109687569A (en) * | 2018-12-11 | 2019-04-26 | 漳州科华技术有限责任公司 | Data center's power supply system |
| CN111799883A (en) * | 2020-06-22 | 2020-10-20 | 深圳科士达科技股份有限公司 | Lithium battery power supply system for supplying power to series connection hot backup uninterrupted power supply |
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| CN117081229A (en) | 2023-11-17 |
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