CN113054736B - Control method of four-inlet-wire power distribution system and four-inlet-wire power distribution system - Google Patents
Control method of four-inlet-wire power distribution system and four-inlet-wire power distribution system Download PDFInfo
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- CN113054736B CN113054736B CN201911389674.4A CN201911389674A CN113054736B CN 113054736 B CN113054736 B CN 113054736B CN 201911389674 A CN201911389674 A CN 201911389674A CN 113054736 B CN113054736 B CN 113054736B
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- 238000006243 chemical reaction Methods 0.000 description 3
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Classifications
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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
- H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
-
- 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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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention relates to a four-inlet-wire power distribution system which comprises a first commercial power supply, a second commercial power supply, a first uninterrupted power supply and a second uninterrupted power supply, wherein the first commercial power supply is connected with a first bus through a first commercial power switch module, the first uninterrupted power supply is connected with the first bus through the first switch module, the second commercial power supply is connected with a second bus through the second commercial power switch module, the second uninterrupted power supply is connected with the second bus through the second switch module, and the first bus and the second bus are connected through a communication switch module. And controlling the on-off of the switch module to control the first commercial power supply and the first uninterrupted power supply to supply power to the first bus respectively, and controlling the second commercial power supply and the second uninterrupted power supply to supply power to the second bus respectively. The invention also relates to a control method of the four-inlet-wire power distribution system. By implementing the invention, the power supply reliability of the four-inlet-wire power distribution system can be ensured at the source, and overload of the oil engine is avoided.
Description
Technical Field
The invention relates to the field of power distribution systems, in particular to a control method of a four-wire distribution system and the four-wire distribution system.
Background
Modern smart grids place new and higher demands on the continuous and reliable operation of power systems. In the power distribution field with higher requirements on power supply reliability in a data center, extremely high power supply reliability needs to be ensured. The prior art has various schemes for increasing the reliability of uninterruptible power supplies. However, when the commercial power and the oil engine are used as power supply sources to supply power simultaneously, a technical scheme for improving the source power supply reliability of the power distribution system from the consideration of the power supply sources is not available.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides a control method of a four-wire distribution system and the four-wire distribution system, which can ensure the power supply reliability of the distribution system at the source.
The technical scheme adopted for solving the technical problems is as follows: the control method comprises the steps that a four-wire distribution system is constructed, the four-wire distribution system comprises a first mains supply, a second mains supply, a first uninterrupted power supply and a second uninterrupted power supply, the first mains supply is connected with a first bus through a first mains switch module, the first uninterrupted power supply is connected with the first bus through the first switch module, the second mains supply is connected with a second bus through a second mains switch module, the second uninterrupted power supply is connected with the second bus through the second switch module, and the first bus and the second bus are connected through a connecting switch module; the control method comprises the following steps: s1, controlling the first mains supply and the first uninterruptible power supply to supply power to a first bus respectively and controlling the second mains supply and the second uninterruptible power supply to supply power to a second bus respectively by controlling the on-off of the first mains supply switch module, the second switch module and the interconnection switch module.
In the control method of the four-wire distribution system of the present invention, the step S1 further includes:
s11, when the first commercial power supply and the second commercial power supply work normally, controlling the first commercial power switch module and the second commercial power switch module to be conducted and the first switch module, the second switch module and the interconnection switch module to be disconnected so as to respectively control the first commercial power supply to supply power to the first bus and the second commercial power supply to supply power to the second bus;
s12, when the first commercial power supply fails, the second commercial power supply works normally and the first uninterrupted power supply is started, controlling the second commercial power switch module and the first switch module to be conducted and the first commercial power switch module, the second switch module and the interconnection switch module to be disconnected so as to respectively control the first uninterrupted power supply to supply power to the first bus and the second commercial power supply to supply power to the second bus;
s13, when the first commercial power supply fails, the second commercial power supply works normally and the first uninterrupted power supply fails, controlling the second commercial power switch module and the interconnection switch module to be conducted and the first commercial power switch module, the first switch module and the second switch module to be disconnected so as to respectively control the second commercial power supply to supply power to the first bus and the second bus;
S14, when the first commercial power source works normally, the second commercial power source fails and the second uninterrupted power source is started, controlling the first commercial power switch module and the second switch module to be conducted, and the second commercial power switch module, the first switch module and the interconnection switch module to be disconnected so as to respectively control the first commercial power source to supply power to the first bus and the second uninterrupted power source to supply power to the second bus;
s15, when the first commercial power source works normally, the second commercial power source fails and the second uninterruptible power source fails, controlling the first commercial power switch module and the interconnection switch module to be conducted and the second commercial power switch module, the first switch module and the second switch module to be disconnected so as to respectively control the first commercial power source to supply power to the first bus and the second bus;
and S16, when the first commercial power supply and the second commercial power supply are failed, controlling the first switch module, the second switch module to be conducted, and the first commercial power switch module, the second commercial power switch module and the interconnection switch module to be disconnected so as to respectively control the first uninterrupted power supply to supply power to the first bus and the second uninterrupted power supply to supply power to the second bus.
In the control method of the four-wire distribution system, the first commercial power supply comprises a first transformer connected with commercial power, the second commercial power supply comprises a second transformer connected with commercial power, the first uninterruptible power supply comprises a first oil engine, and the second uninterruptible power supply comprises a second oil engine.
In the control method of the four-wire distribution system, the first mains supply switch module comprises a first mains supply switch unit, a first mains supply control unit and a first linkage control unit, and in the step S1, the control of the first mains supply switch module to be conducted comprises the control of the first mains supply switch unit to be conducted through the first mains supply control unit based on the fact that the first linkage control unit is turned off when the first switch module is turned off and the linkage switch module or the second mains supply switch module is turned off.
In the control method of the four-wire distribution system of the present invention, the first switch module includes a first switch unit, a first control unit and a second linkage control unit, and in the step S1, controlling the first switch module to be turned on includes controlling the first switch unit to be turned on by the first control unit based on the second linkage control unit when the first switch module and the linkage switch module are turned off and the first mains supply fails.
In the control method of the four-wire distribution system of the present invention, the second mains switch module includes a second mains switch unit, a second mains control unit and a third linkage control unit, and in the step S1, controlling the second mains switch module to be turned on includes controlling the second mains switch unit to be turned on through the second mains control unit based on the third linkage control unit when the second switch module is turned off and the interconnection switch module or the first mains switch module is turned off.
In the control method of the four-wire distribution system of the present invention, the second switch module includes a second switch unit, a second control unit and a fourth linkage control unit, and in the step S1, controlling the second switch module to be turned on includes controlling the second switch unit to be turned on by the second control unit based on the fourth linkage control unit when the second mains switch module and the interconnection switch module are turned off and the second mains supply fails.
In the control method of the four-wire distribution system, the interconnection switch module comprises an interconnection switch unit, an interconnection switch control unit and a fifth interconnection control unit, and in the step S1, the control of the interconnection switch module to be conducted comprises the control of the interconnection switch unit to be conducted through the interconnection switch control unit when the first switch module and the second switch module are disconnected and the second mains switch module or the first mains switch module is disconnected based on the fourth interconnection control unit.
The invention solves the technical problem by adopting another technical scheme that a four-wire distribution system is constructed, the four-wire distribution system comprises a first commercial power supply, a second commercial power supply, a first uninterrupted power supply and a second uninterrupted power supply, wherein the first commercial power supply is connected with a first bus through a first commercial power switch module, the first uninterrupted power supply is connected with the first bus through the first switch module, the second commercial power supply is connected with a second bus through the second commercial power switch module, the second uninterrupted power supply is connected with the second bus through the second switch module, and the first bus and the second bus are connected through a tie switch module; the four-inlet-wire distribution system further comprises a control circuit, and the control circuit is used for controlling the first mains supply switch module, the second mains supply switch module, the first switch module, the second switch module and the connection switch module to be on-off, controlling the first mains supply and the first uninterrupted power source to supply power to the first bus respectively, and controlling the second mains supply and the second uninterrupted power source to supply power to the second bus respectively.
In the four-wire distribution system of the present invention, the control circuit further includes:
The first control module is used for controlling the first mains supply and the second mains supply to be conducted and the first switch module, the second switch module and the interconnecting switch module to be disconnected when the first mains supply and the second mains supply work normally, so as to respectively control the first mains supply to supply power to the first bus and the second mains supply to supply power to the second bus;
the second control module is used for controlling the second mains switch module and the first switch module to be conducted and the first mains switch module, the second switch module and the interconnecting switch module to be disconnected when the first mains supply fails, the second mains supply works normally and the first uninterrupted power supply is started so as to respectively control the first uninterrupted power supply to supply power to the first bus and the second mains supply to supply power to the second bus;
the third control module is used for controlling the second mains supply switch module and the interconnection switch module to be conducted and the first mains supply switch module, the first switch module and the second switch module to be disconnected so as to respectively control the second mains supply to supply power to the first bus and the second bus when the first mains supply fails, the second mains supply works normally and the first uninterrupted power supply fails;
The fourth control module is used for controlling the first mains supply to be conducted with the second switch module and the second mains supply to be disconnected with the interconnection switch module when the first mains supply works normally, the second mains supply fails and the second uninterrupted power supply is started, so as to respectively control the first mains supply to supply power to the first bus and the second uninterrupted power supply to supply power to the second bus;
the fifth control module is used for controlling the first mains supply to be conducted with the interconnection switch module and controlling the second mains supply switch module, the first switch module and the second switch module to be disconnected so as to respectively control the first mains supply to supply power to the first bus and the second bus when the first mains supply is in normal operation, the second mains supply is out of operation and the second uninterrupted power supply is out of operation;
and the sixth control module is used for controlling the first switch module, the second switch module to be conducted and the first commercial power switch module, the second commercial power switch module and the interconnection switch module to be disconnected when the first commercial power source and the second commercial power source are in failure and the first uninterrupted power source and the second uninterrupted power source are started, so as to respectively control the first uninterrupted power source to supply power to the first bus and the second uninterrupted power source to supply power to the second bus.
By implementing the control method of the four-inlet-wire power distribution system and the four-inlet-wire power distribution system, the power supply reliability of the four-inlet-wire power distribution system can be ensured at the source, overload of an oil engine is avoided, and the stability of two paths of mains supplies and two paths of uninterrupted power supplies is ensured by avoiding the mains supply and the uninterrupted power supplies to supply power to the same bus at the same time.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic diagram of a four-wire distribution system to which the control method of the four-wire distribution system of the present invention is applied;
FIG. 2 is a control schematic of a first mains switch module of a preferred embodiment of a four-wire distribution system of the present invention;
fig. 3 is a control schematic of a first switch module of a preferred embodiment of a four-wire distribution system of the present invention;
FIG. 4 is a control schematic of a second mains switch module of a preferred embodiment of a four-wire distribution system of the present invention;
fig. 5 is a control schematic of a second switch module of a preferred embodiment of the four-wire distribution system of the present invention;
fig. 6 is a control schematic of a tie switch module of a preferred embodiment of a four-wire distribution system of the present invention;
fig. 7 is a functional block diagram of a preferred embodiment of the four-wire distribution system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention relates to a control method of a four-wire-inlet power distribution system, which comprises a first mains supply, a second mains supply, a first uninterrupted power supply and a second uninterrupted power supply, wherein the first mains supply is connected with a first bus through a first mains supply switch module, the first uninterrupted power supply is connected with the first bus through the first switch module, the second mains supply is connected with a second bus through the second mains supply switch module, the second uninterrupted power supply is connected with the second bus through the second switch module, and the first bus and the second bus are connected through a tie switch module; the control method comprises the following steps: the first commercial power supply and the first uninterruptible power supply are controlled to supply power to the first bus respectively, and the second commercial power supply and the second uninterruptible power supply are controlled to supply power to the second bus respectively by controlling the on-off of the first commercial power switch module, the second switch module and the interconnection switch module. By implementing the control method of the four-wire distribution system, the power supply reliability of the four-wire distribution system can be ensured at the source by avoiding the power supply of the mains supply and the uninterrupted power supply to the same bus at the same time, the overload of an oil engine is avoided, and the stability of the two-way mains supply and the two-way uninterrupted power supply is ensured.
Fig. 1 shows a schematic diagram of a four-wire distribution system to which the control method of the four-wire distribution system of the present invention is applied. As shown in fig. 1. The four-wire distribution system comprises a first commercial power supply M1, a second commercial power supply M2, a first uninterruptible power supply P1 and a second uninterruptible power supply P2. The first commercial power supply M1 is connected with the first bus I through the first commercial power switch module K2, the first uninterruptible power supply P1 is connected with the first bus I through the first switch module K1, the second commercial power supply M2 is connected with the second bus II through the second commercial power switch module K4, and the second uninterruptible power supply P2 is connected with the second bus II through the second switch module K5. The first bus I and the second bus II are connected through a tie switch module K3.
In the control method of the four-wire distribution system, the first commercial power supply M1 and the first uninterruptible power supply P1 are controlled to supply power to the first bus I respectively, and the second commercial power supply M2 and the second uninterruptible power supply P2 are controlled to supply power to the second bus II respectively by controlling the on-off of the first commercial power switch module K2, the second commercial power switch module K4, the first switch module K1, the second switch module K5 and the interconnection switch module K3.
In the preferred embodiment of the invention, the first mains supply switch module K2, the second mains supply switch module K4, the first switch module K1, the second switch module K5 and the interconnecting switch module K3 can be arranged in different working modes to be conducted or disconnected in different modes, so that the mains supply and the uninterrupted power supply cannot supply power to the same bus at the same time, the conflict of the two mains supplies through the interconnecting switch module K3 is avoided, the overload of the uninterrupted power supply caused by the fact that the uninterrupted power supply supplies power to the two buses at the same time is avoided, and the reliable and stable operation of the power supply systems of the two mains supplies and the two uninterrupted power supplies is ensured.
By implementing the control method of the four-wire distribution system, the power supply reliability of the four-wire distribution system can be ensured at the source by avoiding the power supply of the mains supply and the uninterrupted power supply to the same bus at the same time, the overload of an oil engine is avoided, and the stability of the two-way mains supply and the two-way uninterrupted power supply is ensured.
In a preferred embodiment of the invention, the first mains supply M1 comprises a first transformer connected to mains, the second mains supply M2 comprises a second transformer connected to mains, the first uninterruptible power supply P1 comprises a first oil engine, and the second uninterruptible power supply P2 comprises a second oil engine. In other preferred embodiments of the invention other power supply parts or components may be provided, such as a rectifying and filtering network connected to a transformer, an AC/DC conversion device, a rectifying and filtering network connected to an oil engine, a DC/DC conversion device, etc. Of course, in a further preferred embodiment of the invention, the uninterruptible power supply may also be a rechargeable battery, a solar cell, a fan or the like.
In the preferred embodiment, the first mains switch module K2, the second mains switch module K4, the first switch module K1, the second switch module K5 and the interconnection switch module K3 may be mechanically and electrically interlocked, and may be manually or automatically controlled. Any linkage known in the art may be suitable for use in the present invention.
In a further preferred embodiment of the invention, the first mains supply M1, the second mains supply M2, the first ups P1 and the second ups P2 may be arranged to operate in six modes of operation as shown in table 1. Through in different mode, control first commercial power switch module K2 second commercial power switch module K4 first switch module K1 second switch module K5 with the switch of interconnection switch module K3, and then avoid commercial power and uninterrupted power source to supply power to same generating line simultaneously to avoid the oil engine overload, ensure the stability of two ways commercial power and two ways uninterrupted power source.
TABLE 1
In the first operation mode, that is, when the first and second mains supplies M1 and M2 are both operating normally, the first and second mains switch modules K2 and K4 are controlled to be turned on and the first switch module K1, the second switch module K5 and the interconnecting switch module K3 are controlled to be turned off, so as to control the first mains supply M1 to supply power to the first bus I and the second mains supply M2 to supply power to the second bus II, respectively.
In the second working mode, when the first commercial power supply M1 fails, the second commercial power supply M2 works normally and the first uninterruptible power supply P1 is started, the second commercial power switch module K4 and the first switch module K1 are controlled to be turned on, and the first commercial power switch module K2, the second switch module K5 and the interconnection switch module K3 are controlled to be turned off, so that the first uninterruptible power supply P1 supplies power to the first bus I and the second commercial power supply M2 supplies power to the second bus II.
In the third working mode, when the first commercial power M1 fails, the second commercial power M2 works normally, and the first uninterruptible power P1 fails, the second commercial power switch module K4 and the interconnection switch module K3 are controlled to be turned on, and the first commercial power switch module K2, the first switch module K1 and the second switch module K5 are controlled to be turned off, so that the second commercial power M2 is controlled to supply power to the first bus I and the second bus II respectively.
In the fourth operation mode, when the first commercial power M1 is in normal operation, the second commercial power M2 is disabled and the second uninterruptible power P2 is started, the first commercial power switch module K2 and the second switch module K5 are controlled to be turned on, and the second commercial power switch module K4, the first switch module K1 and the interconnection switch module K3 are controlled to be turned off, so as to respectively control the first commercial power M1 to supply power to the first bus I and the second uninterruptible power P2 to supply power to the second bus II.
In the fifth operation mode, when the first commercial power M1 is in normal operation, the second commercial power M2 is disabled, and the second uninterruptible power P2 is disabled, the first commercial power switch module K2 and the interconnection switch module K3 are controlled to be turned on, and the second commercial power switch module K4, the first switch module K1, and the second switch module K5 are controlled to be turned off, so as to respectively control the first commercial power M1 to supply power to the first bus I and the second bus II.
In the sixth operation mode, when the first and second commercial power sources M1 and M2 fail and the first and second uninterruptible power sources P1 and P2 are started, the first, second and interconnecting switch modules K1, K4 and K3 are controlled to be turned on and turned off respectively to control the first and second uninterruptible power sources P1 and P2 to supply power to the first and second bus bars I and II.
In the invention, by controlling the first mains switch module K2, the second mains switch module K4, the first switch module K1, the second switch module K5 and the interconnecting switch module K3, only two switch modules can be conducted, and the mains switch modules and the switch modules cannot be conducted simultaneously, so that the mains supply and the uninterruptible power supply can be prevented from supplying power to the same bus at the same time, overload of an oil engine is avoided, and the stability of two paths of mains supply and two paths of uninterruptible power supply is ensured.
In a further preferred embodiment of the present invention, the first mains switch module K2, the second mains switch module K4, the first switch module K1, the second switch module K5 and the interconnecting switch module K3 adopt frame switches, and the switching-on principle of the frame switches is utilized, so long as auxiliary contacts (normally closed contacts) of other switches are connected in series or in parallel in an electric switching-on loop of the frame switches, switching-on of the switch module is controlled by switching-on/off setting logic of the auxiliary contacts of the other switches, so as to realize an interlocking function, thereby realizing switching-on and switching-off of each of the switch modules K1-K5. Fig. 2 to 6 show the structure and the control principle of the first mains switch module K2, the second mains switch module K4, the first switch module K1, the second switch module K5 and the interconnection switch module K3, respectively.
As shown in fig. 2, the first mains switch module K2 includes a first mains switch unit K21, a first mains control unit K22, and a first linkage control unit K23. In this embodiment, controlling the first utility power switch module K2 to be turned on includes controlling the first utility power switch unit K21 to be turned on by the first utility power control unit K22 based on the first coordinated control unit K23 when the first switch unit K11 is turned off and the liaison switch unit K31 or the second utility power switch unit K41 is turned off.
As shown in fig. 2, the turning-on of the first mains switch unit K21 may include manual closing and automatic closing. The first mains control unit K22 includes a changeover switch 2SA, a closing button 2ST, and connection contacts 209, 203, 213. When the change-over switch 2SA is turned to a manual gear, that is, the contacts 203 and 209 are turned on, the switch-on coil is powered by manually pressing the 2ST switch-on button, and the first mains switch unit K21 is controlled to be turned on. When the change-over switch 2SA is turned to an automatic gear, namely the contacts 203 and 213 are turned on, when the control power supply L22 is electrified, the time relay 2KT of the first mains switch unit K21 is controlled to delay to close the contacts, automatic delay time is set, a switch closing coil is turned on, and automatic closing of the first mains switch unit K21 is achieved. The disconnection of the first mains supply switch unit K21 is divided into manual brake-off and under-voltage tripping, and the brake-off coil is switched on and powered on by manually pressing a 2STP brake-off button; when the under-voltage coil is powered down, the switch will trip under-voltage.
The precondition for the switching-on of the first mains switch unit K21 is that the first switch unit K11 is switched off and the tie switch unit K31 or the second mains switch unit K41 is switched off. Because the first coordinated control unit K23 controls the on/off of the contacts 201, 200, and 203 according to the states of the first switch module K1, the tie switch module K3, and the second utility switch module K4. When the first switching unit K11 is turned on, the contacts 201 and 200 cannot be turned on, and thus the first mains switching unit K21 is controlled to be unable to be turned on. In contrast, the first mains switch unit K21 can only be switched on when the first switch unit K11 is switched off. This is because, as described above, the mains power supply and the uninterruptible power supply can be integrated. When the tie switch unit K31 and the second mains switch unit K41 are simultaneously turned on, the contacts 200 and 203 cannot be turned on, and thus the first mains switch unit K21 cannot be turned on. And only when any one of the interconnection switch unit K31 and the second mains switch unit K41 is turned off, the first mains switch unit K21 can be turned on, and the principle is that the two mains supplies and the interconnection switch can only be three or two. In this way, the electrical interlock control of the second mains switch module K4, the first switch module K1 and the tie switch module K3 can be achieved.
As shown in fig. 3, the first switch module K1 includes a first switch unit K11, a first control unit K12, and a second linkage control unit K13. In this embodiment, controlling the first switch module K1 to be turned on includes controlling the first switch unit K11 to be turned on by the first control unit K12 when the first switch unit K11 and the tie switch unit K31 are turned off and the first mains supply M1 fails, based on the second tie control unit K13.
As shown in fig. 3, the turning-on of the first switching unit K11 may include manual closing and automatic closing. The first control unit K12 includes a changeover switch 1SA, a closing button 1ST, and connection contacts 109, 103, 113. When the change-over switch 1SA is turned to a manual gear, that is, the contacts 103 and 109 are turned on, the first switch unit K11 is controlled to be turned on by manually pressing the 1ST closing button to switch on the closing coil. When the change-over switch 1SA is turned to an automatic gear, namely the contacts 103 and 113 are switched on, when the control power supply L12 is electrified, the time delay of the time relay 1KT of the first switch unit K11 is controlled to close the contacts, the automatic time delay is set, the switch-on coil is switched on, and the first switch unit K11 is automatically switched on. The disconnection of the first switch unit K11 is divided into manual brake-off and under-voltage tripping, and the brake-off coil is switched on and powered off by manually pressing a 1STP brake-off button; when the under-voltage coil is powered down, the switch will trip under-voltage.
The precondition for the switching-on of the first switching unit K11 is that the first mains supply switching unit K21 and the interconnection switching unit K31 are switched off and the first mains supply M1 is deactivated. This is because the second interlock control unit K13 controls the on-off of the contacts 101, 100, and 103 according to the operation states of the first utility switch module K2, the tie switch module K3, and the first utility power M1. When the first mains switch module K2 or the interconnecting switch module K3 is turned on or the first mains supply M1 works normally, the contacts 101 and 103 cannot be turned on, so that the first switch unit K11 is controlled to be unable to be turned on. The first switching unit K11 can be switched on only if the first mains supply M1 fails while the first mains switching module K2 and the tie switching module K3 are open. This is because, as described above, the utility power source and the ups can be integrated, the ups and the tie switch can be integrated, and the ups cannot be integrated when the utility power source is operating normally, thereby realizing the electrical interlock control of the first utility power switch module K2 and the tie switch module K3.
As shown in fig. 4, the second mains switch module K4 includes a second mains switch unit K41, a second mains control unit K42, and a third linkage control unit K43. In this embodiment, controlling the second utility switch module K4 to be turned on includes controlling the second utility switch unit K41 to be turned on by the second utility control unit K42 based on the third linkage control unit K43 when the second switch unit K51 is turned off and the tie switch unit K31 or the first utility switch unit K21 is turned off.
As shown in fig. 4, the turning-on of the second mains switch unit K41 may include manual closing and automatic closing. The second mains control unit K42 comprises a change-over switch 2SA, a closing button 2ST, and connection contacts 409, 403, 413. When the change-over switch 2SA is turned to a manual gear, that is, the contacts 403 and 409 are turned on, the switch-on coil is powered by manually pressing the 2ST switch-on button, and the second mains switch unit K41 is controlled to be turned on. When the change-over switch 2SA is turned to an automatic gear, namely the contacts 403 and 413 are turned on, when the control power supply L22 is powered on, the time delay of the time relay 2KT of the second commercial power switch unit K41 is controlled to close the contacts, automatic time delay is set, the switch-on coil is turned on, and automatic switching-on of the second commercial power switch unit K41 is realized. The disconnection of the second mains supply switch unit K41 is divided into manual brake-off and under-voltage tripping, and the brake-off coil is switched on and powered on by manually pressing a 2STP brake-off button; when the under-voltage coil is powered down, the switch will trip under-voltage.
The precondition that the second mains switch unit K41 is switched on is that any one of the interconnection switch unit K31 or the first mains switch unit K21 is switched off at the same time as the second switch unit K51 is switched off. When the second switching unit K51 is closed, the contacts 401 and 400 cannot be closed, and thus the second mains switching unit K41 cannot be controlled to be closed. On the contrary, the second mains switch unit K41 can only be switched on when the second switch unit K51 is switched off. This is because, as described above, the mains power supply and the uninterruptible power supply can be integrated. When the tie switch unit K31 and the first mains switch unit K21 are simultaneously turned on, the contacts 400 and 403 cannot be turned on, and thus the second mains switch unit K41 cannot be turned on. And only when any one of the interconnection switch unit K31 and the first mains switch unit K21 is turned off, the second mains switch unit K41 can be turned on, and the principle is that the two mains supplies and the interconnection switch can only be three or two. In this way, the electrical interlock control of the first mains switch module K2, the second switch module K5 and the tie switch module K3 can be achieved.
As shown in fig. 5, the second switch module K5 includes a second switch unit K51, a second control unit K52, and a fourth linkage control unit K53. In this embodiment, controlling the second switch module K5 to be turned on includes controlling the second switch unit K51 to be turned on by the second control unit K52 when the second mains switch unit K41 and the interconnecting switch unit K31 are turned off and the second mains supply M2 fails, based on the fourth interconnecting control unit K53.
As shown in fig. 5, the turning-on of the second switching unit K51 may include manual closing and automatic closing. The second control unit K52 includes a changeover switch 1SA, a closing button 1ST, and connection contacts 509, 503, 513. When the change-over switch 1SA is turned to a manual gear, namely the contacts 503 and 509 are turned on, the switch-on coil is electrified by manually pressing the 1ST switch-on button, and the second switch unit K51 is controlled to be conducted. When the change-over switch 1SA is turned to an automatic gear, namely the contacts 503 and 513 are turned on, when the control power supply L12 is powered on, the time delay of the time relay 1KT of the second switch unit K51 is controlled to close the contacts, automatic time delay is set, the switch closing coil is turned on, and automatic closing of the second switch unit K51 is achieved. The disconnection of the second switch unit K51 is divided into manual brake-off and under-voltage tripping, and the brake-off coil is switched on and powered off by manually pressing a 1STP brake-off button; when the under-voltage coil is powered down, the switch will trip under-voltage.
The precondition for the second switching unit K51 to be switched on is that the second mains supply M2 fails when the second mains switching unit K41 and the tie switching unit K31 are switched off. This is because the fourth linkage control unit K53 controls the on-off of the contacts 501, 500 and 503 according to the operating states of the second mains switch unit K41, the tie switch module K3 and the second mains supply M2. The second switching unit K51 can be switched on only when the second mains supply M2 fails while the second mains switching unit K41 and the tie switching unit K31 are switched off. When the second mains switch unit K41 or the interconnecting switch unit K31 is closed or the second mains supply M2 is operating normally, the contacts 501 and 503 cannot be turned on, and thus the second switch unit K51 cannot be controlled to be closed. This is because, as described above, the utility power source and the ups can be integrated, the ups and the tie switch can be integrated, and the ups cannot be integrated when the utility power source is operating normally, thereby realizing the electrical interlock control of the second utility power switch module K4 and the tie switch module K3.
As shown in fig. 6, the tie switch module K3 includes a tie switch unit K31, a tie switch control unit K32, and a fifth linkage control unit K33. In this embodiment, controlling the interconnection switch module K3 to be turned on includes controlling the interconnection switch unit K31 to be turned on by the interconnection switch control unit K32 based on the fourth interconnection control unit when the first switch unit K11 and the second switch unit K51 are turned off and the second utility switch unit K41 or the first utility switch unit K21 is turned off.
As shown in fig. 6, the tie switch control unit K32 includes a closing button 1ST and a separating button 1STP, and connects the contacts 303, 305, 307. When the manual switch-on is performed, the 1ST switch-on button is manually pressed, the switch-on coil is electrified, and the contact switch unit K31 is electrically switched on. Manual brake-off is carried out, a brake-off coil is switched on and off to obtain electricity by manually pressing a 1STP brake-off button, and a switch unit K31 is connected to electrically brake-off. And on the premise that the switching-on of the switching-on unit K31 is carried out, the first switching unit K11 and the second switching unit K51 are disconnected, and the second mains supply switching unit K41 or the first mains supply switching unit K21 is disconnected. When the first switch unit K11 and the second switch unit K51 are closed, the contacts 301 and 300 cannot be turned on, and the tie switch unit K31 cannot be electrically closed, but the tie switch unit K31 can be closed only when the first switch unit K11 or the second switch unit K51 is turned off. This is because, as described above, the tie switch and the uninterruptible power supply switch can be integrated. When the second mains switch unit K41 and the first mains switch unit K21 are simultaneously switched on, the contacts 300 and 303 cannot be switched on, the tie switch unit K31 cannot be electrically switched on, and on the contrary, the tie switch unit K31 can only be switched on when the second mains switch unit K41 or the first mains switch unit K21 is switched off. The principle is that the two mains supplies and the interconnecting switch can only be combined in three or two, so that the electric interlocking control of the first mains supply switch module K2, the second mains supply switch module K4, the first switch module K1 and the second switch module K5 is realized.
By implementing the control method of the four-wire distribution system, the power supply reliability of the four-wire distribution system can be ensured at the source by avoiding the power supply of the mains supply and the uninterrupted power supply to the same bus at the same time, the overload of an oil engine is avoided, and the stability of the two-way mains supply and the two-way uninterrupted power supply is ensured.
Fig. 7 is a functional block diagram of a preferred embodiment of the four-wire distribution system of the present invention. As shown in fig. 7, the four-wire distribution system includes a first mains supply M1, a second mains supply M2, a first uninterruptible power supply P1, a second uninterruptible power supply P2, and a control circuit 100. The first commercial power M1 is connected with the first bus I through the first commercial power switch module K2, the first uninterrupted power P1 is connected with the first bus I through the first switch module K1, the second commercial power M2 is connected with the second bus II through the second commercial power switch module K4, the second uninterrupted power P2 is connected with the second bus II through the second switch module K5, and the first bus I and the second bus II are connected through the interconnection switch module K3. The control circuit 100 is configured to control the first mains supply M1 and the first uninterruptible power supply P1 to supply power to the first bus I, and control the second mains supply M2 and the second uninterruptible power supply P2 to supply power to the second bus II, respectively, by controlling the on/off of the first mains supply switch module K2, the second mains supply switch module K4, the first switch module K1, the second switch module K5, and the interconnection switch module K3.
In a preferred embodiment of the present invention, the control circuit 100 further comprises: and the first to sixth control modules are used for controlling the four-inlet-wire power distribution system to work in six modes. The first control module is configured to control, when the first mains supply M1 and the second mains supply M2 are both operating normally, the first mains switch module K2 and the second mains switch module K4 to be turned on and the first switch module K1, the second switch module K5 and the interconnection switch module K3 to be turned off, so as to respectively control the first mains supply M1 to supply power to the first bus I and the second mains supply M2 to supply power to the second bus II. The second control module is configured to control, when the first commercial power supply M1 fails, the second commercial power supply M2 works normally, and the first uninterruptible power supply P1 is started, the second commercial power switch module K4 and the first switch module K1 to be turned on, and the first commercial power switch module K2, the second switch module K5 and the interconnection switch module K3 to be turned off, so as to respectively control the first uninterruptible power supply P1 to supply power to the first bus I, and the second commercial power supply M2 to supply power to the second bus II. The third control module is configured to control, when the first commercial power M1 fails, the second commercial power M2 works normally, and the first uninterruptible power supply P1 fails, the second commercial power switch module K4 and the interconnection switch module K3 to be turned on, and the first commercial power switch module K2, the first switch module K1, and the second switch module K5 to be turned off, so as to control the second commercial power M2 to supply power to the first bus I and the second bus II, respectively. The fourth control module is configured to control, when the first commercial power M1 works normally, the second commercial power M2 fails and the second uninterruptible power P2 is started, the first commercial power switch module K2 and the second switch module K5 to be turned on, and the second commercial power switch module K4, the first switch module K1 and the interconnection switch module K3 to be turned off, so as to respectively control the first commercial power M1 to supply power to the first bus I and the second uninterruptible power P2 to supply power to the second bus II. The fifth control module is configured to control, when the first commercial power M1 works normally, the second commercial power M2 fails, and the second uninterruptible power P2 fails, the first commercial power switch module K2 and the interconnection switch module K3 to be turned on, and the second commercial power switch module K4, the first switch module K1, and the second switch module K5 to be turned off, so as to control the first commercial power M1 to supply power to the first bus I and the second bus II, respectively. The sixth control module is configured to control, when the first and second commercial power sources M1 and M2 fail and the first and second uninterruptible power sources P1 and P2 are started, the first switch module K1, the second switch module K5 to be turned on and the first commercial power switch module K2, the second commercial power switch module K4 and the interconnection switch module K3 to be turned off so as to respectively control the first uninterruptible power source P1 to supply power to the first bus I and the second uninterruptible power source P2 to supply power to the second bus II.
Those skilled in the art will appreciate that the first and second power supplies M1 and M2, the first and second uninterruptible power supplies P1 and P2, and the control circuit 100 described above may be constructed according to the embodiments shown in fig. 1-6.
The control circuit and the first to sixth control modules may be realized by hardware, software, or a combination of hardware and software. The invention may be implemented in a centralized fashion in at least one computer system or in a distributed fashion where different elements are spread across several interconnected computer systems. Any kind of computer system or other apparatus adapted for carrying out the methods of the invention is suited. The combination of hardware and software may be a general-purpose computer system with a computer program installed thereon, which, when executed, controls the computer system such that it carries out the methods of the present invention.
The control circuit and the first to sixth control modules described above may also be implemented by a computer program product, the program comprising all the features enabling the implementation of the methods described herein, when those features are installed in a computer system. The computer program in this document refers to: any expression, in any programming language, code or notation, of a set of instructions intended to cause a system having an information processing capability to perform a particular function either directly or after either or both of the following: a) Conversion to other languages, codes or symbols; b) Reproduced in a different format.
By implementing the four-inlet-wire power distribution system, the power supply reliability of the four-inlet-wire power distribution system can be ensured at the source by avoiding the power supply of the mains supply and the uninterrupted power supply to the same bus at the same time, the overload of an oil engine is avoided, and the stability of the two-way mains supply and the two-way uninterrupted power supply is ensured.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. The control method of the four-wire-inlet power distribution system comprises a first commercial power supply, a second commercial power supply, a first uninterrupted power supply and a second uninterrupted power supply, and is characterized in that the first commercial power supply is connected with a first bus through a first commercial power switch module, the first uninterrupted power supply is connected with the first bus through the first switch module, the second commercial power supply is connected with a second bus through a second commercial power switch module, the second uninterrupted power supply is connected with the second bus through the second switch module, and the first bus and the second bus are connected through a tie switch module;
The control method comprises the following steps:
s1, controlling the first mains supply and the first uninterruptible power supply to supply power to a first bus respectively and controlling the second mains supply and the second uninterruptible power supply to supply power to a second bus respectively by controlling the on-off of the first mains supply switch module, the second mains supply switch module, the first switch module, the second switch module and the interconnection switch module;
the step S1 further includes:
s11, when the first commercial power supply and the second commercial power supply work normally, controlling the first commercial power switch module and the second commercial power switch module to be conducted and the first switch module, the second switch module and the interconnection switch module to be disconnected so as to respectively control the first commercial power supply to supply power to the first bus and the second commercial power supply to supply power to the second bus;
s12, when the first commercial power supply fails, the second commercial power supply works normally and the first uninterrupted power supply is started, controlling the second commercial power switch module and the first switch module to be conducted and the first commercial power switch module, the second switch module and the interconnection switch module to be disconnected so as to respectively control the first uninterrupted power supply to supply power to the first bus and the second commercial power supply to supply power to the second bus;
S13, when the first commercial power supply fails, the second commercial power supply works normally and the first uninterrupted power supply fails, controlling the second commercial power switch module and the interconnection switch module to be conducted and the first commercial power switch module, the first switch module and the second switch module to be disconnected so as to respectively control the second commercial power supply to supply power to the first bus and the second bus;
s14, when the first commercial power source works normally, the second commercial power source fails and the second uninterrupted power source is started, controlling the first commercial power switch module and the second switch module to be conducted, and the second commercial power switch module, the first switch module and the interconnection switch module to be disconnected so as to respectively control the first commercial power source to supply power to the first bus and the second uninterrupted power source to supply power to the second bus;
s15, when the first commercial power source works normally, the second commercial power source fails and the second uninterruptible power source fails, controlling the first commercial power switch module and the interconnection switch module to be conducted and the second commercial power switch module, the first switch module and the second switch module to be disconnected so as to respectively control the first commercial power source to supply power to the first bus and the second bus;
S16, when the first commercial power supply and the second commercial power supply are failed, controlling the first switch module, the second switch module to be conducted and the first commercial power switch module, the second commercial power switch module and the interconnection switch module to be disconnected so as to respectively control the first uninterrupted power supply to supply power to the first bus and the second uninterrupted power supply to supply power to the second bus;
the first commercial power supply comprises a first transformer connected with commercial power, the second commercial power supply comprises a second transformer connected with the commercial power, the first uninterruptible power supply comprises a first oil engine, and the second uninterruptible power supply comprises a second oil engine;
the first mains supply switch module comprises a first mains supply switch unit, a first mains supply control unit and a first linkage control unit, and in the step S1, the control of the first mains supply switch module to be conducted comprises the control of the first mains supply switch unit to be conducted through the first mains supply control unit based on the first linkage control unit when the first switch module is disconnected and the linkage switch module or the second mains supply switch module is disconnected;
the first switch module comprises a first switch unit, a first control unit and a second linkage control unit, and in the step S1, the control of the first switch module to be conducted comprises the control of the first switch unit to be conducted through the first control unit based on the second linkage control unit when the first switch module and the linkage switch module are disconnected and the first mains supply fails;
The second mains switch module comprises a second mains switch unit, a second mains control unit and a third linkage control unit, and in the step S1, controlling the second mains switch module to be turned on comprises controlling the second mains switch unit to be turned on through the second mains control unit based on the third linkage control unit when the second switch module is turned off and the interconnection switch module or the first mains switch module is turned off;
the second switch module comprises a second switch unit, a second control unit and a fourth linkage control unit, and in the step S1, controlling the second switch module to be turned on comprises controlling the second switch unit to be turned on by the second control unit based on the fourth linkage control unit when the second mains switch module and the interconnection switch module are turned off and the second mains supply fails;
the interconnection switch module comprises an interconnection switch unit, an interconnection switch control unit and a fifth linkage control unit, and in the step S1, the interconnection switch module is controlled to be conducted based on the fourth linkage control unit, and the interconnection switch unit is controlled to be conducted through the interconnection switch control unit when the first switch module and the second switch module are disconnected and the second mains supply switch module or the first mains supply switch module is disconnected.
2. The four-inlet-wire power distribution system comprises a first commercial power supply, a second commercial power supply, a first uninterrupted power supply and a second uninterrupted power supply, and is characterized in that the first commercial power supply is connected with a first bus through a first commercial power switch module, the first uninterrupted power supply is connected with the first bus through the first switch module, the second commercial power supply is connected with a second bus through a second commercial power switch module, the second uninterrupted power supply is connected with the second bus through the second switch module, and the first bus and the second bus are connected through a connecting switch module;
the four-inlet-wire distribution system further comprises a control circuit, wherein the control circuit is used for controlling the first mains supply and the first uninterruptible power supply to supply power to the first bus respectively and controlling the second mains supply and the second uninterruptible power supply to supply power to the second bus respectively by controlling the on-off of the first mains supply switch module, the second mains supply switch module, the first switch module, the second switch module and the interconnection switch module; the control circuit further includes:
the first control module is used for controlling the first mains supply and the second mains supply to be conducted and the first switch module, the second switch module and the interconnecting switch module to be disconnected when the first mains supply and the second mains supply work normally, so as to respectively control the first mains supply to supply power to the first bus and the second mains supply to supply power to the second bus;
The second control module is used for controlling the second mains switch module and the first switch module to be conducted and the first mains switch module, the second switch module and the interconnecting switch module to be disconnected when the first mains supply fails, the second mains supply works normally and the first uninterrupted power supply is started so as to respectively control the first uninterrupted power supply to supply power to the first bus and the second mains supply to supply power to the second bus;
the third control module is used for controlling the second mains supply switch module and the interconnection switch module to be conducted and the first mains supply switch module, the first switch module and the second switch module to be disconnected so as to respectively control the second mains supply to supply power to the first bus and the second bus when the first mains supply fails, the second mains supply works normally and the first uninterrupted power supply fails;
the fourth control module is used for controlling the first mains supply to be conducted with the second switch module and the second mains supply to be disconnected with the interconnection switch module when the first mains supply works normally, the second mains supply fails and the second uninterrupted power supply is started, so as to respectively control the first mains supply to supply power to the first bus and the second uninterrupted power supply to supply power to the second bus;
The fifth control module is used for controlling the first mains supply to be conducted with the interconnection switch module and controlling the second mains supply switch module, the first switch module and the second switch module to be disconnected so as to respectively control the first mains supply to supply power to the first bus and the second bus when the first mains supply is in normal operation, the second mains supply is out of operation and the second uninterrupted power supply is out of operation;
a sixth control module, configured to control, when the first and second commercial power sources are both disabled and the first and second uninterruptible power sources are both started, the first and second switch modules to be turned on and the first and second commercial switch modules to be turned off, so as to control the first uninterruptible power source to supply power to the first bus and the second uninterruptible power source to supply power to the second bus, respectively;
the first commercial power supply comprises a first transformer connected with commercial power, the second commercial power supply comprises a second transformer connected with the commercial power, the first uninterruptible power supply comprises a first oil engine, and the second uninterruptible power supply comprises a second oil engine; the first mains supply switch module comprises a first mains supply switch unit, a first mains supply control unit and a first linkage control unit; the first switch module comprises a first switch unit, a first control unit and a second linkage control unit; the second mains supply switch module comprises a second mains supply switch unit, a second mains supply control unit and a third linkage control unit; the second switch module comprises a second switch unit, a second control unit and a fourth linkage control unit; the interconnection switch module comprises an interconnection switch unit, an interconnection switch control unit and a fifth linkage control unit;
The first control module, the second control module, the third control module, the fourth control module, the fifth control module and the sixth control module are further configured to control the first mains switch unit to be turned on through the first mains control unit based on the first coordinated control unit when the first switch module is turned off and the interconnection switch module or the second mains switch module is turned off; controlling the first switch unit to be turned on by the first control unit based on the second linkage control unit when the first switch module and the tie switch module are turned off and the first mains supply fails; controlling the second mains supply switch unit to be turned on through the second mains supply control unit based on the third linkage control unit when the second switch module is turned off and the interconnection switch module or the first mains supply switch module is turned off; controlling the second switch unit to be conducted through the second control unit based on the fourth linkage control unit when the second mains switch module and the interconnecting switch module are disconnected and the second mains supply fails; and controlling the connection switch unit to be connected through the connection switch control unit based on the fourth connection control unit when the first switch module and the second switch module are disconnected and the second mains supply switch module or the first mains supply switch module is disconnected.
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| CN201911389674.4A CN113054736B (en) | 2019-12-27 | 2019-12-27 | Control method of four-inlet-wire power distribution system and four-inlet-wire power distribution system |
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| CN201911389674.4A CN113054736B (en) | 2019-12-27 | 2019-12-27 | Control method of four-inlet-wire power distribution system and four-inlet-wire power distribution system |
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| CN107026449A (en) * | 2016-02-02 | 2017-08-08 | 艾默生网络能源（江门）有限公司 | A kind of source power distribution system |
| CN107040039A (en) * | 2016-02-03 | 2017-08-11 | 艾默生网络能源（江门）有限公司 | A kind of distribution system and its control method |
| CN206977148U (en) * | 2017-07-31 | 2018-02-06 | 烟台海珐电气科技有限公司 | It is a kind of that civil power and the circuit of oil machine switching are controlled using PLC and touch-screen |
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2019
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107026449A (en) * | 2016-02-02 | 2017-08-08 | 艾默生网络能源（江门）有限公司 | A kind of source power distribution system |
| CN107040039A (en) * | 2016-02-03 | 2017-08-11 | 艾默生网络能源（江门）有限公司 | A kind of distribution system and its control method |
| CN206977148U (en) * | 2017-07-31 | 2018-02-06 | 烟台海珐电气科技有限公司 | It is a kind of that civil power and the circuit of oil machine switching are controlled using PLC and touch-screen |
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