CN210074867U - Control circuit of standby power supply - Google Patents
Control circuit of standby power supply Download PDFInfo
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- CN210074867U CN210074867U CN201921037978.XU CN201921037978U CN210074867U CN 210074867 U CN210074867 U CN 210074867U CN 201921037978 U CN201921037978 U CN 201921037978U CN 210074867 U CN210074867 U CN 210074867U
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Abstract
The utility model provides a stand-by power supply's control circuit, this control circuit includes: a first backup power supply and a second backup power supply; the first standby power supply is connected with the second standby power supply through the first bus coupler switch and 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 the first feeder switch, and the first load group is connected with the second load group through the 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, and the second standby power supply is connected with the second load group through a second feeder switch and is connected with the fourth load group through a fourth feeder switch; the third load group is connected with the first standby power supply through a third feeder switch and is connected with the fourth load group through a third bus coupler 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 utility model relates to a stand-by power supply technical field especially indicates a stand-by power supply's 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.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a stand-by power supply's control circuit to solve the stand-by power supply who uses after large-scale mill and important research base have a power failure because the condition such as bus or generator maintenance or trouble can not satisfy the power supply demand, thereby lead to partial equipment can not normal operating and probably cause the problem of power supply potential safety hazard.
According to a first aspect, embodiments of the present invention provide a control circuit of a standby 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.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
an embodiment of the utility model provides a stand-by power supply's control circuit, include: 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.
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 structure of a control circuit of the standby power supply according to the embodiment of the present invention;
fig. 3 is a flowchart of a control method of a control circuit of the backup power supply according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another configuration of the control circuit of the backup power supply according to the embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can 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 sets of the first load group 2, the second load group 3, the third load group 6, and the fourth load group 7 is 1 set as an example, and in practical application, the sets of the first load group 2, the second load group 3, the third load group 6, and the fourth load group 7 can 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, the two third backup power supplies are taken as an example for description, and in practical applications, the number of the third backup power supplies may be set to 1 or more according to actual needs, which is not limited by the present invention.
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.
The embodiment of the utility model provides a control method of stand-by power supply's control circuit is still provided, as shown in fig. 3, control method is applied to as above stand-by power supply's control circuit, include:
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 above-mentioned step S1 to step S4, the embodiment of the utility model provides a stand-by power supply' S control method, the number of judging power supply and being in abnormal state, the state according to stand-by power supply comes nimble alternative use stand-by power supply, has realized the uninterrupted power supply of consumer, avoids because the outage, causes the emergence of the equipment normal operating condition, has also effectively avoided the emergence of 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 will be described in detail with an example of four groups of standby power supplies in total, in which 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, a plurality of generating sets that set up on each stand-by power supply are diesel generating set, of course, do not influence the utility model discloses a under the condition of using, can adopt other types of generator. 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 the utility model discloses an optional implementation of embodiment, in practical application, when being in the fault condition for the stand-by power supply of the load group power supply that the power supply that is in abnormal state corresponds, can not consider the power supply demand of the load group that the power supply that is in abnormal state corresponds, and directly choose for use other trouble-free stand-by power supplies to supply power for the load group that is in the power-off state, the utility model discloses it is not limited to this.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A control circuit for a backup power supply, comprising: a first backup power supply (100) and a second backup power supply (200), wherein,
the first standby power supply (100) is connected with the second standby power supply (200) through a first bus-coupled 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).
2. The control circuit of a backup power supply according to claim 1, characterized in that 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).
3. 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).
4. The control circuit of a backup power supply according to claim 1, further comprising: at least one third backup power supply;
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 coupler switch.
5. The control circuit of a backup power supply according to claim 4, 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).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921037978.XU CN210074867U (en) | 2019-07-04 | 2019-07-04 | Control circuit of standby power supply |
| PCT/CN2019/113222 WO2021000462A1 (en) | 2019-07-04 | 2019-10-25 | Control circuit of backup power supply and control method for control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921037978.XU CN210074867U (en) | 2019-07-04 | 2019-07-04 | Control circuit of standby power supply |
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| CN210074867U true CN210074867U (en) | 2020-02-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247469A (en) * | 2019-07-04 | 2019-09-17 | 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 |
| 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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2019
- 2019-07-04 CN CN201921037978.XU patent/CN210074867U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247469A (en) * | 2019-07-04 | 2019-09-17 | 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 |
| 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 |
| CN110247469B (en) * | 2019-07-04 | 2021-06-08 | 河北秦淮数据有限公司 | Control circuit of standby power supply and control method of control circuit |
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