CN110247469B - Control circuit of standby power supply and control method of control circuit - Google Patents
Control circuit of standby power supply and control method of control circuit Download PDFInfo
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- CN110247469B CN110247469B CN201910600934.1A CN201910600934A CN110247469B CN 110247469 B CN110247469 B CN 110247469B CN 201910600934 A CN201910600934 A CN 201910600934A CN 110247469 B CN110247469 B CN 110247469B
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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
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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
- H02J9/08—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 requiring starting of a prime-mover
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Direct Current Feeding And Distribution (AREA)
Abstract
The invention provides a control circuit of a standby power supply and a control method of the control circuit, wherein the control circuit comprises: the system comprises a first standby power supply, a second standby power supply and at least one third standby power supply; the first standby power supply and the second standby power supply and all the third standby power supplies are sequentially connected through a bus coupler switch, the second standby power supply is connected with the first third standby power supply through the bus coupler switch, each standby power supply is correspondingly provided with at least one load group, and each standby power supply is connected with the load group through a feeder switch; when the power supply is in an abnormal state, the standby power supply can be flexibly selected to supply power to the load group corresponding to the power supply in the abnormal state uninterruptedly.
Description
Technical Field
The present invention relates to the field of standby power supply technologies, and in particular, to a control circuit of a standby power supply and a control method of the control circuit.
Background
With the development of society, more and more large-scale factories and important research bases need to continuously supply power to equipment at present, and once power is cut off, all the equipment cannot continuously work, so that the working process is influenced; the serious result is that the product developed for a long time is abandoned, and huge loss is brought. These large plants and important research sites are often powered by providing backup power when mains failure or other reasons fail to supply power.
However, in the design aspect of the existing standby power supply, the number of used buses and the number of generators connected with each bus are small, and in the using process, when the bus or the generator is overhauled or fails and the like and cannot meet the power supply requirement, part of equipment cannot normally operate; and a power generator can supply power to a plurality of devices simultaneously, so that the problem of potential safety hazard of power supply is caused.
Disclosure of Invention
The invention aims to provide a control circuit of a standby power supply and a control method of the control circuit, and aims to solve the problems that the standby power supply used after power failure of a large-scale factory and an important research base cannot meet the power supply requirement due to the conditions of overhaul or fault of a bus or a generator and the like, so that part of equipment cannot normally operate and potential power supply safety hazards can be caused.
According to a first aspect, an embodiment of the present invention provides a control circuit of a backup power supply, including: the system comprises a first standby power supply and a second standby power supply, wherein the first standby power supply is connected with the second standby power supply through a first bus coupler switch; the first standby power supply is correspondingly provided with at least one first load group and at least one second load group, the first standby power supply is connected with the first load group through a first feeder switch, and the first load group is connected with the second load group through a second bus coupler switch; the second standby power supply is correspondingly provided with at least one third load group and at least one fourth load group, the second standby power supply is connected with the second load group through a second feeder switch, the third load group is connected with the first standby power supply through a third feeder switch, and the third load group is connected with the fourth load group through a third bus coupler switch; the second standby power supply is connected with the fourth load group through a fourth feeder switch.
Optionally, the first backup power supply includes: a first bus bar; the first generator sets are electrically connected with the first bus and used for supplying power to the first load set and/or the second load set and/or the third load set and/or the fourth load set through the first bus.
Optionally, the second backup power supply includes: a second bus bar; and the plurality of second generator sets are electrically connected with the second bus and used for supplying power to the first load group and/or the second load group and/or the third load group and/or the fourth load group through the second bus.
Optionally, the method further includes: at least one third backup power supply; all the third standby power supplies are connected through the bus coupler switch in sequence; and the second standby power supply is connected with the first third standby power supply through a fourth bus coupler switch.
Optionally, when the first backup power source and the second backup power source cannot meet the preset power supply requirement of the first load group and/or the second load group and/or the third load group and/or the fourth load group, the third backup power source is configured to supply power to the first load group and/or the second load group and/or the third load group and/or the fourth load group.
According to a second aspect, an embodiment of the present invention further provides a control method of a control circuit of a backup power supply, the control method being applied to the control circuit of the backup power supply according to the first aspect, including: judging whether power supply sources corresponding to the first load group, the second load group, the third load group and the fourth load group are in an abnormal working state or not; when the power supplies are in an abnormal state, judging the number of the power supplies in the abnormal state; when the number of the power supplies in the abnormal state is less than or equal to a first preset threshold value, judging whether the first standby power supply is in a maintenance mode; when the first standby power supply is not in the maintenance mode, the first feeder switch is closed, or the first feeder switch and the second bus coupler switch are closed, and/or the third feeder switch is closed, or the third feeder switch and the third bus coupler switch are closed, so that the first standby power supply is enabled to supply power to the load group corresponding to the power supply in the abnormal state.
Optionally, when the first standby power supply is in the maintenance mode, determining whether the second standby power supply is in the maintenance mode; and when the second standby power supply is not in the maintenance mode, closing the second feeder switch and the second bus coupler switch, and/or closing the fourth feeder switch and the third bus coupler switch, so as to start the second standby power supply to supply power to the load group corresponding to the power supply in the abnormal state.
Optionally, when the number of the power supplies in the abnormal state is greater than the first preset threshold, the first standby power supply and the second standby power supply are started to supply power to the load group corresponding to the power supply in the abnormal state.
Optionally, the starting the first standby power supply and the second standby power supply to supply power to the load group corresponding to the power supply in the abnormal state includes: and selecting to close the first feeder switch, the second feeder switch and the second buscouple switch and/or close the third feeder switch, the fourth feeder switch and the third buscouple switch according to the number of the power supplies in the abnormal state, so as to enable the first standby power supply and the second standby power supply to supply power to the load group corresponding to the power supplies in the abnormal state.
Optionally, when the control circuit of the standby power supply further includes: when at least one third standby power supply is used, the control method further comprises the following steps: when the number of the power supplies in the abnormal state is larger than a second preset threshold, the second preset threshold is larger than the first preset threshold, and the first standby power supply, the second standby power supply and at least one third standby power supply are started to supply power to the load group corresponding to the power supply in the abnormal state according to the number of the power supplies in the abnormal state.
The technical scheme of the invention has the following beneficial effects:
an embodiment of the present invention provides a control circuit of a standby power supply, including: the first standby power supply is connected with the second standby power supply through a first bus coupler switch; the first standby power supply is correspondingly provided with at least one first load group and at least one second load group, the first standby power supply is connected with the first load group through a first feeder switch, and the first load group is connected with the second load group through a second bus coupler switch; the second standby power supply is correspondingly provided with at least one third load group and at least one fourth load group, the second standby power supply is connected with the second load group through a second feeder switch, the third load group is connected with the first standby power supply through a third feeder switch, and the third load group is connected with the fourth load group through a third bus coupler switch; the second standby power supply is connected with the fourth load group through the fourth feeder switch. Therefore, cross power supply between the first standby power supply and the second standby power supply can be realized; when the power supply is in an abnormal state, different standby power supplies can be flexibly selected to supply power uninterruptedly to the load group corresponding to the power supply in the abnormal state, the situation that the equipment cannot normally run due to power failure is avoided, and the potential safety hazard of power supply is effectively avoided.
The embodiment of the invention provides a control method of a control circuit of a standby power supply, which comprises the following steps: judging whether power supply sources corresponding to the first load group, the second load group, the third load group and the fourth load group are in an abnormal working state or not; when the power supplies are in an abnormal state, judging the number of the power supplies in the abnormal state; when the number of the power supplies in the abnormal state is less than or equal to a first preset threshold value, judging whether the first standby power supply is in a maintenance mode; and when the first standby power supply is not in the maintenance mode, closing the first feeder switch and the second bus coupler switch, and/or closing the third feeder switch and the third bus coupler switch so as to start the first standby power supply to supply power to the load group corresponding to the power supply in the abnormal state. By judging the number of the power supplies in the abnormal state and flexibly selecting the standby power supplies according to the state of the standby power supplies, the uninterrupted power supply of the electric equipment is realized, the situation that the equipment cannot normally run due to power failure is avoided, and the potential safety hazard of power supply is also effectively avoided.
Drawings
Fig. 1 is a schematic structural diagram of a control circuit of a standby power supply according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of a control circuit of a standby power supply;
FIG. 3 is a flow chart illustrating a method of controlling a control circuit of the backup power supply according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another structure of the control circuit of the standby power supply according to the embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, an embodiment of the present invention provides a control circuit of a standby power supply, including: the power supply system comprises a first standby power supply 100 and a second standby power supply 200, wherein the first standby power supply 100 is connected with the second standby power supply 200 through a first bus coupler switch 1; the first standby power supply 100 is correspondingly provided with a first load group 2 and a second load group 3, the first standby power supply 100 is connected with the first load group 2 through a first feeder switch 4, and the first load group 2 is connected with the second load group 3 through a second bus coupler switch 5; the second standby power supply 200 is correspondingly provided with a third load group 6 and a fourth load group 7, the second standby power supply 200 is connected with the second load group 3 through a second feeder switch 8, the third load group 6 is connected with the first standby power supply 100 through a third feeder switch 17, and the third load group 6 is connected with the fourth load group 7 through a third bus coupler switch 9; the second backup power supply is connected to the fourth load group 7 via a fourth feeder switch 10. It should be noted that, in the embodiment of the present invention, the number of the first load group 2, the second load group 3, the third load group 6, and the fourth load group 7 is 1 group as an example, in practical application, a plurality of groups of the first load group 2, the second load group 3, the third load group 6, and the fourth load group 7 may be set according to practical needs, and the present invention is not limited thereto. Through the design of the circuit, the cross power supply between the first standby power supply 100 and the second standby power supply 200 can be realized; when the power supply is in an abnormal state, the standby power supply can be flexibly selected to supply power uninterruptedly to the load group corresponding to the power supply in the abnormal state, the situation that the equipment cannot normally run due to power failure is avoided, and the potential safety hazard of power supply is effectively avoided.
When the first standby power supply 100 is in maintenance or failure, the second standby power supply 200 can supply power to the first load group 2 connected with the first standby power supply 100 by closing the second feeder switch 8 and the second buscouple switch 5, and the second standby power supply 200 can supply power to the third load group 6 connected with the first standby power supply 100 by closing the fourth feeder switch 10 and the third buscouple switch 9; when the second backup power supply 200 is in maintenance or failure, the first backup power supply 100 can supply power to the second load group 3 connected with the second backup power supply 200 by closing the first feeder switch 4 and the second buscouple switch 5, or the first backup power supply 100 can supply power to the fourth load group 7 connected with the second backup power supply 200 by closing the third feeder switch 17 and the third buscouple switch 9.
In one embodiment, as shown in fig. 2, the first backup power supply 100 includes: a first bus bar 11; and the plurality of first generator sets 12 are electrically connected with the first bus bar 11 and are used for supplying power to the first load set 2 and/or the second load set 3 and/or the third load set 6 and/or the fourth load set 7 through the first bus bar 11. The second backup power supply 200 includes: a second bus bar 13; and the plurality of second generator sets 14 are electrically connected with the second bus 13 and used for supplying power to the first load group 2 and/or the second load group 3 and/or the third load group 6 and/or the fourth load group 7 through the second bus 13.
In an embodiment, as shown in fig. 4, the control circuit of the backup power supply further includes: two third backup power supplies, namely, a third backup power supply 300 and a third backup power supply 400; the third standby power supply 300 and the third standby power supply 400 are connected through the bus coupler switch in sequence; the second backup power supply 200 is connected to the first third backup power supply 300 through the fourth buscouple switch. It should be noted that, in the embodiment of the present invention, two third backup power supplies are taken as an example for description, in practical applications, the number of the third backup power supplies may be set to be 1 or more according to actual needs, and the present invention is not limited thereto.
In practical application, when the number of the third backup power supplies is an even number, the connection relationship between the load group corresponding to each of the two third backup power supplies and each of the third backup power supplies may be the same as the connection relationship between the first backup power supply and the second backup power supply, so as to implement cross power supply.
In an embodiment, as shown in fig. 4, the third backup power source includes: a third bus bar 32; and the third generator sets are electrically connected with the third bus bar 32 and used for supplying power to the load groups corresponding to the first load group 2, the second load group 3, the third load group 6, the fourth load group 7 and/or the third standby power supply through the third bus bar 32.
In an embodiment, when the first backup power source 100 and the second backup power source 200 cannot meet the preset power supply requirement of the first load group 2 and/or the second load group 3 and/or the third load group 6 and/or the fourth load group 7, the third backup power source is used as a supplement to supply power to the load corresponding to the first load group 2 and/or the second load group 3 and/or the third load group 6 and/or the fourth load group 7 and/or the third backup power source.
In one embodiment, as shown in fig. 2, the first backup power supply 100 further includes: the first voltage signal synchronization module 15 is configured to detect whether voltage signals of the plurality of first generator sets 12 are synchronized after the plurality of first generator sets 12 are started; when the voltage signals of the first generator sets 12 are asynchronous, the voltage signals of the first generator sets 12 need to be synchronized, and then the corresponding generator set switches are closed to start the first generator sets 12, otherwise, potential safety hazards can occur; the second backup power supply 200 further includes: the second voltage signal synchronization module 16 is configured to detect whether the voltage signals of the plurality of second generator sets 14 are synchronized after the plurality of second generator sets 14 are started; when the voltage signals of the second generator sets 14 are asynchronous, the voltage signals of the second generator sets 14 need to be synchronized, and then corresponding generator set switches are closed to start the second generator sets 14, otherwise, potential safety hazards can occur; certainly, before the first buscouple switch 1 between the first standby power supply 100 and the second standby power supply 200 is closed, it is also required to detect whether the voltage signals on the first bus 11 and the second bus 13 are synchronous through the first voltage signal synchronization module 15 and the second voltage signal synchronization module 16, and when the voltage signals on the first bus 11 and the second bus 13 are asynchronous, it is required to synchronize the voltage signals on the first bus 11 and the second bus 13, and then close the first buscouple switch 1; when the third standby power is needed, it is also needed to detect whether to synchronize with the voltage signal of the first standby power 100 and/or the second standby power 200; the voltage signal includes: phase angle, phase, and waveform, etc.
In one embodiment, as shown in fig. 2, the first backup power supply 100 further includes: the debugging feeder switch 18 can be closed when each standby power supply needs to be debugged, so that each standby power supply can be debugged conveniently.
Through the design of the circuit, the cross power supply between the first standby power supply 100 and the second standby power supply 200 can be realized; when the first standby power supply 100 is in maintenance or failure, the second standby power supply 200 can supply power to the first load group 2 connected with the first standby power supply 100 by closing the second feeder switch 8 and the second buscouple switch 5, and the second standby power supply 200 can supply power to the third load group 6 connected with the first standby power supply 100 by closing the fourth feeder switch 10 and the third buscouple switch 9; when the second backup power supply 200 is in an overhaul or fault state, the first backup power supply 100 can supply power to the second load group 3 connected with the second backup power supply 200 by closing the first feeder switch 4 and the second bus coupler switch 5, and the first backup power supply 100 can supply power to the fourth load group 7 connected with the second backup power supply 200 by closing the third feeder switch 17 and the third bus coupler switch 9, so that even if the first backup power supply 100 or the second backup power supply 200 is in an overhaul or fault state, uninterrupted power supply can be performed for the electric equipment, and therefore the occurrence of power supply potential safety hazards can be avoided.
An embodiment of the present invention further provides a control method of a control circuit of a standby power supply, as shown in fig. 3, where the control method is applied to the control circuit of the standby power supply, and includes:
step S1: judging whether power supply sources corresponding to the first load group 2, the second load group 3, the third load group 6 and the fourth load group 7 are in an abnormal working state or not; when the power supply is in the abnormal working state, which means that the power supply cannot normally supply power to the corresponding first load group 2, second load group 3, third load group 6 and fourth load group 7, the switch between the load group and the corresponding power supply needs to be disconnected.
Step S2: when the power supplies are in an abnormal state, judging the number of the power supplies in the abnormal state;
step S3: when the number of the power supplies in the abnormal state is less than or equal to a first preset threshold, judging whether the first standby power supply 100 is in a maintenance mode; the first preset threshold is a value set by a worker according to work requirements, and is greater than zero;
step S4: when the first backup power supply 100 is not in the maintenance mode, the first feeder switch 4 is closed, or the first feeder switch 4 and the second buscouple switch 5 are closed, and/or the third feeder switch 17 is closed, or the third feeder switch 17 and the third buscouple switch 9 are closed, so as to start the first backup power supply 100 to supply power to the load group corresponding to the power supply in the abnormal state.
Through the steps S1 to S4, the control method of the control circuit of the standby power supply according to the embodiment of the present invention determines the number of power supplies in the abnormal state, and flexibly selects and uses the standby power supply according to the state of the standby power supply, thereby implementing uninterrupted power supply of the electrical equipment, avoiding the occurrence of the situation that the equipment cannot normally operate due to power failure, and effectively avoiding the occurrence of the power supply potential safety hazard.
It should be noted that, before the feeder switch between the load group corresponding to the power supply in the abnormal state and the standby power supply is closed, the generator set is already started, and after the feeder switch is closed, the generator set can directly supply power to the power-off load group.
In an embodiment, when the number of the power supplies in the abnormal state is greater than a first preset threshold, and neither the first backup power supply 100 nor the second backup power supply 200 is in the maintenance state, the first backup power supply 100 and the second backup power supply 200 are started to supply power to the load group corresponding to the power supply in the abnormal state. Thus, when one standby power supply cannot supply power to the load group corresponding to the power supply in the abnormal state, two standby power supplies can supply power to the load in the abnormal state.
Specifically, starting the first standby power supply 100 and the second standby power supply 200 to supply power to the load group corresponding to the power supply in the abnormal state includes: and according to the number of the power supplies in the abnormal state, selectively closing the first feeder switch 4, the second feeder switch 8 and the second bus coupler switch 5, and/or closing the third feeder switch 17, the fourth feeder switch 10 and the third bus coupler switch 9 to start the first standby power supply 100 and the second standby power supply 200 to supply power to the load group corresponding to the power supplies in the abnormal state.
In one embodiment, when the first backup power supply 100 is in the maintenance mode, it is determined whether the second backup power supply 200 is in the maintenance mode; and when the second standby power supply 200 is not in the maintenance mode, closing the second feeder switch 8 and the second bus bar switch 5, and/or closing the fourth feeder switch 10 and the third bus bar switch 9, so as to start the second standby power supply 200 to supply power to the load group corresponding to the power supply in the abnormal state.
Therefore, when the standby power supply is in the maintenance mode, the load group corresponding to the standby power supply in the maintenance mode can be supplied with power through other standby power supplies, so that the electric equipment corresponding to the standby power supply in the maintenance mode cannot be in a power-off state; therefore, the problem that the load group cannot normally operate does not occur.
In one embodiment, as shown in fig. 4, the control circuit of the standby power further includes: when two third backup power supplies are used, the control method further includes: when the number of the power supplies in the abnormal state is greater than a second preset threshold, wherein the second preset threshold is greater than the first preset threshold, the first standby power supply 100, the second standby power supply 200 and the two third standby power supplies are started to supply power to the load group corresponding to the power supply in the abnormal state according to the number of the power supplies in the abnormal state. The first preset threshold and the second preset threshold both refer to the number of power supplies in an abnormal state, and in practical application, the first preset threshold and the second preset threshold may be set according to the number of generator sets of each standby power supply and the number of load sets corresponding to the power supplies.
In practical application, the prior art may also be adopted, after the feeder switch between the load group corresponding to the power supply in the abnormal state and the backup power supply is closed, and the corresponding generator set supplies power to the power-losing load group, if the corresponding backup power supply cannot supply power to the power-losing load group, the bus-tie switch between the backup power supply and the other backup power supply is closed, so that the generator sets on the adjacent backup power supplies simultaneously supply power to the power-losing load group.
For convenience of understanding, as shown in fig. 4, the embodiment of the present invention takes four groups of standby power supplies as an example to describe in detail the control method of the control circuit of the standby power supplies, where the control circuit includes: a first backup power supply 100, a second backup power supply 200, a third backup power supply 300, and a third backup power supply 400;
the third backup power supply 300 is connected to the third backup power supply 400 through the eighth buscouple switch 35; the first backup power supply 100 may be connected 400 to the third backup power supply through a seventh buscouple switch 19; the second backup power supply 200 may be connected to the third backup power supply 300 through the fourth buscouple switch 20;
the third standby power supply 300 is correspondingly provided with at least one fifth load group 21 and at least one sixth load group 22, the third standby power supply 300 is connected with the fifth load group 21 through a fifth feeder switch 23, and the sixth load group 22 is connected with the fifth load group 21 through a fifth bus coupler switch 24;
the third standby power supply 400 is correspondingly provided with at least one seventh load group 25 and at least one eighth load group 26, the third standby power supply 400 is connected with the sixth load group 22 through a sixth feeder switch 27, the seventh load group 25 is connected with the third standby power supply 300 through a seventh feeder switch 28, and the seventh load group 25 is connected with the eighth load group 26 through a sixth bus coupler switch; the third backup power supply 400 is connected to the eighth load group 26 through the eighth feeder switch 30.
The first backup power supply 100 includes: a plurality of first generator sets 12 each connected to the first bus bar 11; the first load group 2 corresponds to a first power supply 36, and the second load group 3 corresponds to a second power supply 37;
the second backup power supply 200 includes: a plurality of second generator sets 14, each connected to the second bus bar 13; the third load group 6 corresponds to the third power supply 38, and the fourth load group 7 corresponds to the fourth power supply 39;
the third backup power supply 300 includes: a plurality of third generator sets 31 each connected to a third bus bar 32; the fifth load group 21 corresponds to the fifth power supply 40, and the sixth load group 22 corresponds to the sixth power supply 41;
the third backup power supply 400 includes: a plurality of fourth generator sets 33 each connected to a fourth bus bar 34; the seventh load group 25 corresponds to the seventh power supply 42, and the eighth load group 26 corresponds to the eighth power supply 43.
Specifically, when the first standby power supply 100, the second standby power supply 200, the third standby power supply 300, and the third standby power supply 400 are not in the maintenance mode, taking as an example that the first power supply 36, the second power supply 37, the third power supply 38, and the fourth power supply 39 respectively corresponding to the first standby power supply 100 and the second standby power supply 200 are in an abnormal state, so as to start the first standby power supply 100, the second standby power supply 200, the third standby power supply 300, and the third standby power supply 400 to supply power to the load groups corresponding to the first power supply 36 and/or the second power supply 37 and/or the third power supply 38 and/or the fourth power supply 39 in the abnormal state, the following four working conditions are divided into:
in a first working condition, when the first preset threshold is set to be 2 and the number of the power supplies in the abnormal state is equal to 1, and the first power supply 36 corresponding to the first load group 2 is in the abnormal state, the first feeder switch 4 needs to be closed, and the second bus tie switch 5 needs to be opened, so that the plurality of first generator groups 12 on the first backup power supply 100 supply power to the first load group 2; in an alternative embodiment, the second buscouple switch 5 may also be closed if the capacity of the second power supply 37 is sufficient to supply the first load group 2, so that the second power supply supplies the first load group 2.
If the second power supply 37, the third power supply 38, and the fourth power supply 39 corresponding to the second load group 3, the third load group 6, or the fourth load group 7 are in an abnormal state, the process logic of selecting the standby power is the same as that when the first power supply 36 corresponding to the first load group 2 is in an abnormal state, and details thereof are not repeated here.
In the second working condition, when the first preset threshold is set to 2, the second preset threshold is set to 3, and the number of the power supplies in the abnormal state is equal to 2, the following situations are described.
Firstly, if the first power supply 36 and the second power supply 37 respectively corresponding to the first load group 2 and the second load group 3 are in an abnormal state, the second bus-bar switch 5 and the first feeder switch 4 need to be closed, so that the plurality of first generator groups 12 on the first standby power supply 100 supply power to the first load group 2 and the second load group 3.
If the third power supply 38 and the fourth power supply 39 corresponding to the third load group 6 and the fourth load group 7 are in an abnormal state, the process logic of selecting the standby power supply is the same as the process when the first power supply 36 and the second power supply 37 corresponding to the first load group 2 and the second load group 3 are in an abnormal state, and details are not repeated here.
Secondly, if the first power supply 36 and the third power supply 38 respectively corresponding to the first load group 2 and the third load group 6 are in an abnormal state, the first feeder switch 4 and the third feeder switch 17 need to be closed, so that the plurality of first generator groups 12 on the first standby power supply 100 supply power to the first load group 2 and the third load group 6; in an alternative embodiment, if the capacity of the second power supply 37 is sufficient to supply power to the first load group 2, the second buscouple switch 5 may also be closed, so that the second power supply 37 supplies power to the first load group 2; when the capacity of the fourth power supply 39 is sufficient to supply power to the third load group 6, the third buscouple switch 9 may also be closed, so that the fourth power supply 39 supplies power to the third load group 6.
If the second power supply 37 and the fourth power supply 39 corresponding to the second load group 3 and the fourth load group 7 are in an abnormal state, the process logic of selecting the standby power supply is the same as the process when the first power supply 36 and the third power supply 38 corresponding to the first load group 2 and the third load group 6 are in an abnormal state, and details are not repeated here.
Thirdly, if the first power supply 36 and the fourth power supply 39 respectively corresponding to the first load group 2 and the fourth load group 7 are in an abnormal state, the first feeder switch 4 and the third buscouple switch 9 need to be closed, and the switches between the second buscouple switch 5 and the third power supply 38 and the third load group 6 need to be opened; enabling a plurality of first generator sets 12 on the first backup power source 100 to supply power for the first load set 2, the third load set 6 and the fourth load set 7; in an alternative embodiment, the second buscouple switch 5 may also be closed if the capacity of the second power supply 37 is sufficient to supply the first load group 2, so that the first power supply supplies the first load group 2; when the capacity of the third power supply 38 is sufficient to supply power to the fourth load group 7, the third buscouple switch 9 may also be closed, so that the third power supply 38 supplies power to the fourth load group 7.
If the second power supply 37 and the third power supply 38 respectively corresponding to the second load group 3 and the third load group 6 are in an abnormal state, the process logic of selecting the standby power supply is the same as the process when the first power supply 36 and the fourth power supply 39 respectively corresponding to the first load group 2 and the fourth load group 7 are in an abnormal state, and details are not repeated here.
In a third working condition, when the first preset threshold is set to 2, the second preset threshold is set to 3, and the number of power supplies in an abnormal state is equal to 3, if the first power supply 36, the second power supply 37, and the third power supply 38 respectively corresponding to the first load group 2, the second load group 3, and the third load group 6 are in an abnormal state, the first feeder switch 4, the second feeder switch 8, and the third feeder switch 17 need to be closed, and the second bus coupler switch 5 and the third bus coupler switch 9 need to be opened; a plurality of first generator sets 12 on the first backup power source 100 are caused to supply power to the first load set 2 and the third load set 6, and a plurality of second generator sets 14 on the second backup power source 200 are caused to supply power to the second load set 3.
If the first power supply 36, the second power supply 37, and the fourth power supply 39 respectively corresponding to the first load group 2, the second load group 3, and the fourth load group 7 are in an abnormal state, or if the second power supply 37, the third power supply 38, and the fourth power supply 39 respectively corresponding to the second load group 3, the third load group 6, and the fourth load group 7 are in an abnormal state, the process logic of selecting the backup power is the same as that when the first power supply 36, the second power supply 37, and the third power supply 38 respectively corresponding to the first load group 2, the second load group 3, and the third load group 6 are in an abnormal state, and details thereof are not repeated herein.
Under a fourth working condition, when the first preset threshold is set to 2, the second preset threshold is set to 3, and the number of the power supplies in the abnormal state is equal to 4, at this time, the first standby power supply 100, the second standby power supply 200, the third standby power supply 300, and/or the third standby power supply 400 need to be started; if the first power supply 36, the second power supply 37, the third power supply 38 and the fourth power supply 39 respectively corresponding to the first load group 2, the second load group 3, the third load group 6 and the fourth load group 7 are in an abnormal state, the first feeder switch 4, the second feeder switch 8, the third feeder switch 17 and the fourth feeder switch 10 need to be closed, and the fourth bus coupler switch 20 or the seventh bus coupler switch 19 needs to be closed; the first load group 2, the second load group 3, the third load group 6 and the fourth load group 7 are powered by a plurality of first generator sets 12 on the first backup power source 100, a plurality of second generator sets 14 on the second backup power source 200, a plurality of third generator sets 31 on the third backup power source 300 and/or a plurality of fourth generator sets 33 on the third backup power source 400.
It should be noted that, when the power supplies corresponding to the third backup power supply 300 and the third backup power supply 400 are in an abnormal state, so as to start the third backup power supply 300 and the third backup power supply 400, and the first backup power supply 100 and the second backup power supply 200 supply power to the load group corresponding to the power supply in the abnormal state, the process logic of selecting the backup power supply is the same as the process when the power supplies corresponding to the first backup power supply 100 and the second backup power supply 200 are in the abnormal state, and details are not repeated here.
Specifically, when the first backup power supply 100, the second backup power supply 200, the third backup power supply 300, or the third backup power supply 400 is in the maintenance mode, the following description will be given by taking the case where the first backup power supply 100 is in the maintenance mode as an example:
firstly, when the first power supply 36 corresponding to the first load group 2 is in an abnormal state, the second feeder switch 8 is closed, the switch between the second power supply 37 and the second load group 3 is opened, and the second bus-bar switch 5 is closed, so that a plurality of generator sets on the second standby power supply 200 can simultaneously supply power to the first load group 2 and the second load group 3; in an alternative embodiment, if the capacity of the second power supply 37 is sufficient to supply the first load group 2, the second buscouple switch 5 may be closed so that the second power supply 37 supplies the first load group 2.
If the third power supply 38 corresponding to the third load group 6 is in an abnormal state, the process logic of selecting the standby power supply is the same as that of the first power supply 36 corresponding to the first load group 2 in the abnormal state, and details thereof are not repeated herein.
Secondly, when the first power supply 36 corresponding to the first load group 2 and the second power supply 37 corresponding to the second load group 3 are in an abnormal state, the second feeder switch 8 and the second bus tie switch 5 need to be closed, so that the plurality of second generator sets 14 of the second standby power supply 200 provide power for the first load group 2 and the second load group 3;
thirdly, when the first power supply 36 and the third power supply 38 respectively corresponding to the first load group 2 and the third load group 6 are in an abnormal state, the second feeder switch 8 and the second bus bar switch 5 are closed, the switch between the second power supply 37 and the second load group 3 is opened, so that the plurality of second generator sets 14 on the second backup power supply 200 supply power for the first load group 2 and the second load group 3, the fourth feeder switch 10 and the third bus bar switch 9 are closed, the switch between the fourth power supply 39 and the fourth load group 7 is opened, and the plurality of second generator sets 14 on the second backup power supply 200 supply power for the third load group 6 and the fourth load group 7; in an alternative embodiment, if the capacity of the second power supply 37 is sufficient to supply the first load group 2, the second buscouple switch 5 may be closed, so that the second power supply 37 supplies the first load group 2; when the capacity of the fourth power supply 39 is sufficient to supply the third load group 6, the third buscouple switch 9 may be closed, so that the fourth power supply 39 supplies power to the third load group 6.
Fourthly, when the first power supply 36 and the fourth power supply 39 respectively corresponding to the first load group 2 and the fourth load group 7 are in an abnormal state, the second feeder switch 8 and the second bus bar switch 5 are closed, and simultaneously the switch between the second power supply 37 and the second load group 3 is opened, so that the plurality of second generator sets 14 on the second backup power supply 200 supply power for the first load group 2 and the second load group 3, and the fourth feeder switch 10 is closed, and the third bus bar switch 9 is opened, so that the plurality of second generator sets 14 on the second backup power supply 200 supply power for the fourth load group 7; in an alternative embodiment, if the capacity of the second power supply 37 is sufficient to supply the first load group 2, the second buscouple switch 5 may be closed, so that the second power supply 37 supplies the first load group 2; when the capacity of the third power supply 38 is sufficient to supply power to the fourth load group 7, the third buscouple switch 9 may be closed, so that the third power supply 38 supplies power to the fourth load group 7.
If the second standby power supply 200, the third standby power supply 300, or the third standby power supply 400 is in the maintenance mode, the process logic of selecting the standby power supply for the corresponding load group is the same as that of selecting the standby power supply for the first standby power supply 100 in the maintenance mode, and details thereof are not repeated herein.
In one embodiment, when the bus tie switch between the buses is closed and each generator set is started, whether the voltage signals between the buses and the voltage signals between the generators are consistent or not is judged; when the voltage signals are inconsistent, adjustment is needed, and corresponding bus tie switches and switches between the generator set and the bus bar can not be closed until the adjustment is consistent, otherwise, danger can occur.
It should be noted that the multiple generator sets provided on each backup power supply are all diesel generator sets, and of course, other types of generators may be adopted without affecting the use of the present invention. By the control method of the control circuit of the standby power supply, when the standby power supply is in the maintenance mode, the load group corresponding to the standby power supply in the maintenance mode can be supplied with power through other standby power supplies, so that the load group corresponding to the standby power supply in the maintenance mode cannot be in a power-off state; therefore, the problem that the load group cannot normally operate does not occur.
As an optional implementation manner of the embodiment of the present invention, in practical application, when the backup power supply that supplies power to the load group corresponding to the power supply in the abnormal state is in the fault state, the power supply requirement of the load group corresponding to the power supply in the abnormal state may not be considered, and other non-fault backup power supplies may be directly selected to supply power to the load group in the power loss state, which is not limited to this.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A control circuit for a backup power supply, comprising: a first backup power source (100), a second backup power source (200), and at least a third backup power source, wherein,
the first standby power supply (100) is connected with the second standby power supply (200) through a first bus coupler switch (1);
the first standby power supply (100) is correspondingly provided with at least one first load group (2) and at least one second load group (3), the first standby power supply (100) is connected with the first load group (2) through a first feeder switch (4), and the first load group (2) is connected with the second load group (3) through a second bus coupler switch (5);
the second standby power supply (200) is correspondingly provided with at least one third load group (6) and at least one fourth load group (7), the second standby power supply (200) is connected with the second load group (3) through a second feeder switch (8), the third load group (6) is connected with the first standby power supply (100) through a third feeder switch (17), and the third load group (6) is connected with the fourth load group (7) through a third bus coupler switch (9); the second standby power supply (200) is connected with the fourth load group (7) through a fourth feeder switch (10);
all the third standby power supplies are connected through the bus coupler switch in sequence;
the second standby power supply (200) is connected with the first third standby power supply through a fourth bus-coupled switch;
the first backup power supply (100) comprises:
a first bus bar (11);
a plurality of first generator sets (12) electrically connected to the first busbar (11) for supplying the first load set (2) and/or the second load set (3) and/or the third load set (6) and/or the fourth load set (7) with power via the first busbar (11).
2. The control circuit of a backup power supply according to claim 1, characterized in that the second backup power supply (200) comprises:
a second bus bar (13);
a plurality of second generator sets (14), electrically connected to the second busbar (13), for supplying the first load group (2) and/or the second load group (3) and/or the third load group (6) and/or the fourth load group (7) with power via the second busbar (13).
3. The control circuit of a backup power supply according to claim 2, characterized in that the third backup power supply is configured to power the first load group (2) and/or the second load group (3) and/or the third load group (6) and/or the fourth load group (7) when the first backup power supply (100) and the second backup power supply (200) are unable to meet the preset power supply requirements of the first load group (2) and/or the second load group (3) and/or the third load group (6) and/or the fourth load group (7).
4. A control method of a control circuit of a backup power supply, the control method being applied to the control circuit of the backup power supply according to any one of claims 1 to 3, comprising:
judging whether power supply sources corresponding to the first load group (2), the second load group (3), the third load group (6) and the fourth load group (7) are in an abnormal working state or not;
when the power supplies are in an abnormal state, judging the number of the power supplies in the abnormal state;
when the number of the power supplies in the abnormal state is less than or equal to a first preset threshold value, judging whether the first standby power supply (100) is in a maintenance mode;
when the first standby power supply (100) is not in a maintenance mode, closing the first feeder switch (4), or closing the first feeder switch (4) and the second buscouple switch (5), and/or closing the third feeder switch (17), or closing the third feeder switch (17) and the third buscouple switch (9), so as to enable the first standby power supply (100) to supply power to a load group corresponding to the power supply in the abnormal state;
when the number of the power supplies in the abnormal state is larger than a second preset threshold, the second preset threshold is larger than the first preset threshold, and the first standby power supply (100), the second standby power supply (200) and at least one third standby power supply are started to supply power to the load group corresponding to the power supply in the abnormal state according to the number of the power supplies in the abnormal state.
5. The control method of the control circuit of the backup power supply according to claim 4,
when the first standby power supply (100) is in a maintenance mode, judging whether the second standby power supply (200) is in the maintenance mode;
and when the second standby power supply (200) is not in the maintenance mode, closing the second feeder switch (8) and the second buscouple switch (5), and/or closing the fourth feeder switch (10) and the third buscouple switch (9) to enable the second standby power supply (200) to supply power to the load group corresponding to the power supply in the abnormal state.
6. The control method of the control circuit of the backup power supply according to claim 4,
and when the number of the power supplies in the abnormal state is larger than the first preset threshold and smaller than the second preset threshold, starting the first standby power supply (100) and the second standby power supply (200) to supply power to the load group corresponding to the power supply in the abnormal state.
7. The method for controlling the control circuit of the backup power supply according to claim 6, wherein the activating the first backup power supply (100) and the second backup power supply (200) to supply power to the load group corresponding to the power supply in the abnormal state comprises: and according to the number of the power supplies in the abnormal state, selectively closing the first feeder switch (4), the second feeder switch (8) and the second bus-coupled switch (5), and/or closing the third feeder switch (17), the fourth feeder switch (10) and the third bus-coupled switch (9) so as to start the first standby power supply (100) and the second standby power supply (200) to supply power to the load group corresponding to the power supplies in the abnormal state.
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| WO2021000462A1 (en) * | 2019-07-04 | 2021-01-07 | 北京秦淮数据有限公司 | Control circuit of backup power supply and control method for control circuit |
| CN110323828A (en) * | 2019-07-04 | 2019-10-11 | 河北秦淮数据有限公司 | A kind of control circuit of backup power source and the control method of control circuit |
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