CN104753162B - Base station electric power system and its multichannel AC power-supply switching method - Google Patents
Base station electric power system and its multichannel AC power-supply switching method Download PDFInfo
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- CN104753162B CN104753162B CN201310743780.4A CN201310743780A CN104753162B CN 104753162 B CN104753162 B CN 104753162B CN 201310743780 A CN201310743780 A CN 201310743780A CN 104753162 B CN104753162 B CN 104753162B
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- power supply
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
-
- 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
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Rectifiers (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a kind of base station electric power system and its multichannel AC power-supply switching method, it is related to supply of electric power technical field, solves the problem of existing high failure rate when switching multichannel AC power supply using ATS in existing system, the reliability of oil machine output is low.In the electric power system of base station, rectification module has ac input end and the first DC output end, it is electrically connected after the ac output end parallel connection of each road AC power with ac input end, for the direct current for by the alternating current inputted from ac input end being converted into that there is first voltage, exported from the first DC output end；DC DC conversion module has the first direct-flow input end and the second DC output end, first DC output end is electrically connected the first direct-flow input end, for the direct current with first voltage to be converted into the direct current with second voltage, exported from the second DC output end to power to base station equipment；Control module is used to control at least that AC power to be turned on and off all the way.
Description
Technical field
The present invention relates to supply of electric power technology, more particularly to base station electric power system and its multichannel AC power-supply switching method.
Background technology
With being continuously increased for mobile phone user, the covering surface of base station is also constantly expanding, it is often necessary to suburb, highway,
The remote areas such as mountain area and island establishes base station, and these remote districts be typically without the unstable area of alternating current or alternating current, because
This needs to use diesel generating set in these areas（Referred to as：Oil machine）As spare AC power.
Under normal conditions, the electric power system for a base station power supply from far-off regions includes three tunnel AC powers, such as Fig. 6
It is shown, it is all the way alternating current, is exported all the way for the exchange of the first oil machine, is exported all the way for the exchange of the second oil machine, the second oil machine is
The spare oil machine of first oil machine, in an oil machine failure, another oil machine can ensure the normal work of base station.Hand on this three tunnel
Pass through two exchange automatic switching control equipments between galvanic electricity source（ATS, Automatic transfer switching
equipment）Parallel connection, the action for being turned on and off and coordinating control ATS of control module control oil machine is to realize multichannel AC
The switching of power supply, so that in no alternating current or alternating current shakiness the first oil machine of start by set date as spare AC power, or first
In the case that oil machine cannot normally start, start the second oil machine and meet base station as spare AC power, or in city's electric energy
During power demands, oil machine is closed.Wherein, the first ATS is used to select the output of the first oil machine or the second oil machine defeated as exchanging
Go out, the 2nd ATS is used to select the output of alternating current or oil machine to export as exchange.Exchange output is converted into direct current again, with
Used for base station.
During ATS switching AC powers are used, inventor has found：ATS is using double contactors（It is spaced apart）It is or single
Knife is double to press switch, belongs to mechanical action and switchs, and when switch on and switch off, has a mechanical action and electric arc, high failure rate, in addition,
The output of oil machine will pass through two switching switches, and reliability is relatively low.
The content of the invention
The embodiment of the present invention provides a kind of base station electric power system and its multichannel AC power-supply switching method, solves existing
The problem of existing high failure rate when switching multichannel AC power supply using ATS in system, the reliability of oil machine output is low.
To reach above-mentioned purpose, the embodiment of the present invention adopts the following technical scheme that：
In a first aspect, the embodiment of the present invention provides a kind of base station electric power system, including multichannel AC power supply and control mould
Block, further includes rectification module and DC-dc conversion module；Rectification module, has ac input end and the first DC output end,
It is electrically connected after the ac output end parallel connection of AC power described in each road with the ac input end, the rectification module is used for will be from
The alternating current of the ac input end input is converted into the direct current with first voltage, defeated from first DC output end
Go out；DC-dc conversion module, has the first direct-flow input end and the second DC output end, the first DC output end electricity
First direct-flow input end is connected, DC-dc conversion module is used to the direct current with the first voltage being converted into
Direct current with second voltage, exports from second DC output end to power to base station equipment；Control module, for controlling
At least the AC power is turned on and off system all the way.
With reference to first aspect, in the first possible implementation of first aspect, the multichannel AC power supply includes
Alternating current and the first oil machine；The control module, for controlling first oil machine to be turned on and off.
The possible implementation of with reference to first aspect the first, in second of possible implementation, the base station
Electric power system further includes power supply unit, has the 3rd DC output end that is electrically connected with base station equipment, and with described second
The second direct-flow input end that DC output end is electrically connected, the power supply unit are used for the direct current with second voltage
Electricity is converted into the direct current with given voltage needed for the base station equipment, is exported from the 3rd DC output end；It is described
Control module is additionally operable to control the current value of the 3rd DC output end output.
Second of possible implementation with reference to first aspect, in the third possible implementation, the exchange
Power supply further includes the second oil machine；The control module, for controlling being turned on and off for second oil machine.
Second with reference to first aspect or the third possible implementation, in the 4th kind of possible implementation
In, the base station electric power system further includes storage battery, has the charging end that is electrically connected with the 3rd DC output end, and with institute
The discharge end of base station equipment electrical connection is stated, the storage battery is used for there be the straight of the given voltage by the charging end
Galvanic electricity is converted into electric energy storage, or is converted into having the direct current of the given voltage defeated by discharge end the electric energy of storage
Go out to the base station equipment；The control module is used for the state for detecting the storage battery.
With reference to first aspect, in the 5th kind of possible implementation of first aspect, the rectification module is bridge-type half
Ripple rectification circuit or full-wave bridge rectifier circuit.
Second aspect, the embodiment of the present invention provide a kind of multichannel AC power-supply switching method, are for powering to base station
Multichannel AC power supply in system switches over, and the base station electric power system further includes：Rectification module, DC-dc conversion module,
Power supply unit and storage battery；It is electrically connected after the ac output end parallel connection of AC power described in each road with the rectification module,
The rectification module is electrically connected with the DC-dc conversion module, and the DC-dc conversion module is supplied with the power supply
Unit is electrically connected, and the DC output end of the power supply unit is electrically connected with the storage battery；The multichannel AC power supply bag
Include alternating current and oil machine；The described method includes：When mains failure and discharged or defective battery, make the direct current of the power supply unit defeated
The electric current of outlet output is gradually decrease to the power supply unit and closes；The oil machine is opened, and starts timer；When described
Timer time arrives, and opens the power supply unit.
With reference to second aspect, in the first possible implementation of second aspect, the multichannel AC power supply switching
Method further includes：When the oil machine scarce capacity, reduce the electric current that the DC output end of the power supply unit exports.
With reference to the possible implementation of the first of second aspect or second aspect, second in second aspect may
Implementation in, the multichannel AC power-supply switching method further includes：When alternating current ability is sufficient and the oil machine has turned on,
Make the electric current that the DC output end of the power supply unit exports be gradually decrease to the power supply unit to close；Close institute
Oil machine is stated, and starts the timer；When the timer time arrives, the power supply unit is opened.
With reference to second of possible implementation of second aspect, in the third possible implementation, the multichannel
AC power switching method further includes：When the alternating current scarce capacity, make the DC output end of the power supply unit defeated
The electric current gone out reduces.
In base station electric power system provided in an embodiment of the present invention and its multichannel AC power-supply switching method, each road AC power
Ac output end parallel connection after be electrically connected with the ac input end of rectification module, can be by each road AC power by rectification module
The alternating current of output is converted to direct current, and then the direct current of rectification module output directly passes through DC-dc conversion module
Direct-flow input end supplies DC-dc conversion module, is transformed into the direct current with given voltage, so that base station equipment uses,
Control module is only turned on and off at least AC power all the way when needed, so as to fulfill the switching of AC power, due to whole
Mechanical action switch need not be used to can be achieved with switching different AC powers as base station equipment power supply in electric power system, therefore
Can solve in existing electric power system and be exported reliable using existing high failure rate during ATS switching multichannel AC power supplys, oil machine
The problem of property is low.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of block diagram of base station electric power system provided in an embodiment of the present invention；
Fig. 2 is the block diagram of another base station electric power system provided in an embodiment of the present invention comprising base station equipment；
The square frame for the base station electric power system that Fig. 3 is applied by multichannel AC power-supply switching method provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of flow chart of multichannel AC power-supply switching method provided in an embodiment of the present invention；
Fig. 5 is the flow chart of another multichannel AC power-supply switching method provided in an embodiment of the present invention；
Fig. 6 is the block diagram of existing base station electric power system.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
An embodiment of the present invention provides a kind of base station electric power system, as shown in Figure 1, the system includes multichannel AC power supply
（11~13）, control module 14, rectification module 15 and DC-dc conversion module 16.Wherein, rectification module 15 is defeated with exchanging
Enter 151 and first DC output end 152 of end, each road AC power（11~13）Ac output end parallel connection after with ac input end
151 are electrically connected.
It should be noted that show 3 tunnel AC powers in Fig. 1, but the present invention is not limited thereto, can be 2 roads or
More than 3 tunnels.What it is generally using AC power is three-phase alternating current, it has three ac output ends, such as three exchange outputs
End is respectively：A, b, c.The ac output end parallel connection of above-mentioned each road AC power refers to：The a ends of all AC powers are electrically connected
Together, b ends are electrically connected, and c ends are electrically connected, and form three ac output ends after parallel connection respectively.
When AC power is single-phase alternating current, AC power 12 as shown in Figure 1, only there is an exchange to export for it
This ac output end, can be connected a ends, b ends and c ends of other AC powers respectively, realize single phase alternating current power supply and three by end
The output terminal of cross streams power supply is in parallel.
Rectification module 15 can use existing three-phase bridge rectifier circuit, and three ac input ends 151 of the circuit are distinguished
It is electrically connected with three ac output ends after AC power parallel connection, realizes that the backward rectification module output in parallel of multichannel AC power supply is handed over
Galvanic electricity energy.
Rectification module 15 is used to the alternating current inputted from ac input end 151 being converted into the direct current with first voltage
Electricity, exports from the first DC output end 152.That is, rectification module 15 can convert alternating current to direct current and export.
DC-dc conversion module 16 in the electric power system of base station is defeated with the first direct-flow input end 161 and the second direct current
Outlet 162, the first DC output end 152 of rectification module 15 are electrically connected first direct-flow input end 162, DC-dc conversion
Module 16 is used to the direct current with first voltage that 15 first DC output end 152 of rectification module exports being converted into the
The direct current of two voltages, and exported from the second DC output end 162 to power to base station equipment.That is, DC-DC becomes
The direct current that mold changing block exports rectification module 15 has carried out further processing, generates the direct current that suitable base station equipment uses
Electricity.
Control module 14 in the electric power system of base station, for controlling, at least AC power is turned on and off all the way.
In base station electric power system provided in an embodiment of the present invention, after the ac output end parallel connection of each road AC power with rectification
The ac input end of module is electrically connected, and the alternating current that each road AC power exports can be converted to direct current by rectification module
Electricity, the direct-flow input end that the direct current that then rectification module exports directly passes through DC-dc conversion module supply DC-DC
Conversion module, is transformed into the direct current with given voltage, for base station equipment use, control module only when needed open or
At least AC power all the way is closed, so as to fulfill the switching of AC power, since machinery need not be used in whole electric power system
Step switch can be achieved with switching different AC powers as base station equipment power supply, therefore can solve and be adopted in existing electric power system
The problem of existing high failure rate when switching multichannel AC power supply with ATS, the reliability of oil machine output is low.
Usually, as shown in Fig. 2, multichannel AC power supply can include 21 and first oil machine 22 of alternating current.Herein " the
One " is only used for not being to oil machine quantity nominally otherwise varied with " the second oil machine " mentioned in example below and making
With limitation sequentially.The first oil machine 22 in multichannel AC power supply can be realized by the control of control module 14 opens and closes
Close.First oil machine 22 produces three-phase alternating current when opening.
Alternating current 21 is three-phase alternating current, has three ac output ends, and the first oil machine 22 also has three ac output ends,
It is electrically connected after the ac output end parallel connection of two kinds of AC powers with rectification module 15.Through such a connection manner, when alternating current 21
During phase shortage, i.e., the virtual value for having an intersecting galvanic electricity in three-phase alternating current is 0, since the alternating current of other phases also can input rectifying
Module 15, therefore electric energy can be made full use of, improve efficiency of energy utilization.
Base station electric power system shown in Fig. 2 can also include power supply unit（Power supply unit, referred to as：
PSU）23, there is the 3rd DC output end 232 that is electrically connected with base station equipment 24, and with DC-dc conversion module 16 second
The second direct-flow input end 231 that DC output end 162 is electrically connected, power supply unit 23 are used for DC-dc conversion module
The direct current with second voltage of 16 second DC output ends 162 output is converted into electric with specifying needed for base station equipment 24
The direct current of pressure.Usual second voltage has 400v or so, is 48v through the transformed voltages of PSU23, from the 3rd DC output end
232 outputs, directly feed base station equipment 24.PSU is common power-supply device, and can be converted to alternating current or direct current has
The direct current of required voltage, the present invention are the high straightening for exporting DC-dc conversion module 16 using the purpose of PSU here
Galvanic electricity is depressured.
The control module 14 in the electric power system of base station shown in Fig. 2 can be also used for the 3rd direct current output of control PSU23
The current value of the output of end 232.Purpose is：It is defeated by limiting the 3rd DC output end 232 before the first oil machine 22 is turned on and off
The current value gone out, realizes No Load Start or the shutdown of the first oil machine 22；It can also realize according to whether the ability of AC power fills
Foot come adjust the 3rd DC output end 232 output current value, to prevent the overload of AC power.Specific control method
It is described in detail in following embodiment of the method.
In addition, the first oil machine 22 makes power supply because failure cannot start in the base station electric power system shown in Fig. 2 in order to prevent
Systemic breakdown, can also include the second spare oil machine 25 in multichannel AC power supply, and the function of control module 14 further includes control
Make being turned on and off for the second oil machine 25.
Base station electric power system shown in Fig. 2 can also usually include storage battery 26, it has defeated with the 3rd direct current of PSU23
The charging end 261 that outlet 232 is electrically connected, and the discharge end 262 being electrically connected with base station equipment 24, storage battery 26 is used for will be by filling
The direct current with given voltage at electric end 261 is converted into electric energy storage, or the electric energy of storage is converted into having and specifies electricity
The direct current of pressure is exported to base station equipment 24 by discharge end 262；Control module is used for the state for detecting storage battery 26, i.e. basis
Whether the voltage or the size of electric current that storage battery 26 exports are less than preset value, determine storage battery 26 whether power shortage.When storage battery 26
When the voltage or electric current of output are less than preset value, it is determined that 26 power shortage of storage battery.The effect of storage battery 26 be alternating current power-off and
When the electric energy that oil machine produces does not reach base station equipment 24 also, interim electric energy is provided for base station equipment 24, makes the electricity of base station equipment 25
Source is uninterrupted.
In the base station electric power system that above-described embodiment provides, rectification module 15 can be known to those skilled in the art appoints
What a kind of circuit module that can convert alternating current to direct current, such as bridge-type half-wave rectifying circuit or full-wave bridge rectifier circuit.
The embodiment of the present invention additionally provides a kind of multichannel AC power-supply switching method, for powering to the base station shown in Fig. 3
Multichannel AC power supply in system switches over, which further includes：Rectification module 33, DC-dc conversion mould
Block 34, power supply unit 35 and storage battery 36；It is electrically connected after the ac output end parallel connection of each road AC power with rectification module 33
Connect, which is electrically connected with DC-dc conversion module 34, and the DC-dc conversion module 34 and power supply supply are single
Member 35 is electrically connected, and the DC output end 351 of the power supply unit 35 is electrically connected with storage battery 36；The multichannel AC power supply includes
Alternating current 31 and oil machine 32.As shown in figure 4, the multichannel AC power-supply switching method includes the following steps.The executive agent of this method
It is the control module 37 in the electric power system of base station.The control module 37 be electrically connected alternating current 31, oil machine 32, power supply unit 35 and
Storage battery 36.
401st, when mains failure and discharged or defective battery, make the electric current that the DC output end of power supply unit exports gradual
It is decreased to power supply unit closing.
Specifically, whether alternating current 31, which has a power failure, to be obtained by control module 37 by its being electrically connected between alternating current 31 to detect
, whether power shortage can also be determined storage battery 36 by control module 37, and control module 37 passes through its being electrically connected between storage battery 36
When connecing detection and obtain the voltage and current that storage battery 36 exports, and judging that the size of voltage or electric current be less than preset value, storage is determined
36 power shortage of battery.When mains failure and discharged or defective battery, between ensureing that base station electric power system can provide not for base station equipment
Power-off source, it is necessary to start oil machine 32, be that base station equipment is powered after its caused alternating current is converted to direct current.
But oil machine 32, in start-up course, the starting current that inside produces is larger, if oil machine 32 is in connection load
In the case of start, starting current can bigger, oil machine 32 can be damaged when serious, it is therefore desirable to by load shedding, start etc. oil machine 32
Finish, during stable operation, reconnect load.Control module 37 is by exporting the DC output end 351 of power supply unit 35
Electric current be gradually decrease to power supply unit closing, to realize load shedding.
402nd, oil machine is opened, and starts timer.
Specifically, the time of timer can according to set using the model of oil machine, the oil start of different model
The time that process needs is different.
403rd, when timer time arrives, power supply unit is opened.
Power supply unit 35 is opened to realize the connection load of oil feeder 32.
Multichannel AC power-supply switching method provided in an embodiment of the present invention is used for the multichannel AC in the electric power system of base station
Power supply switches over, in the base station electric power system, the friendship after the ac output end parallel connection of each road AC power with rectification module
Flow input terminal to be electrically connected, the alternating current that each road AC power exports can be converted to by direct current by rectification module, it is then whole
The direct current of flow module output directly supplies DC-dc conversion module by the direct-flow input end of DC-dc conversion module,
The direct current with given voltage is transformed into, so that base station equipment uses, control module is only turned on and off at least when needed
AC power all the way, so as to fulfill the switching of AC power, due to need not be switched in whole electric power system using mechanical action
It can be achieved with switching different AC powers as base station equipment power supply, therefore can solve and be cut in existing electric power system using ATS
Change existing high failure rate during multichannel AC power supply, the problem of reliability of oil machine output is low.
After oil machine normally starts, in 32 operational process of oil machine, it may occur however that the problem of oil machine scarce capacity, such as oil machine 32
Cooling water water temperature over-high or oil machine 32 output voltage it is very low, at this moment, if the load of connection does not change, oil
Electric current inside machine 32 will increase, and the caloric value of oil machine 31 can increase, and cause water temperature to continue to increase, serious to damage oil machine
32.Therefore need to perform following step 404, to prevent oil machine 32 to be damaged.
404th, when oil machine scarce capacity, reduce the electric current that the DC output end of power supply unit exports.
Specifically, the load that can reduce oil machine 32 by performing the step and be connected, ensures the operation of 32 low-load of oil machine.
In addition, when alternating current ability is sufficient, i.e. alternating current not phase shortage, and output voltage, electric current and frequency be attained by control
During the value that molding block 37 is default to be met to base station equipment power demands, the oil machine having turned on can be closed, to reach section
The about purpose of the energy.Therefore, which can also include step as shown in Figure 5.
501st, when alternating current ability is sufficient and oil machine has turned on, the electric current that exports the DC output end of power supply unit
It is gradually decrease to power supply unit closing.
Specifically, for oil machine 32 in closing process, inside can also produce larger electric current, if oil machine 32 is loaded in connection
In the case of close, electric current can bigger, oil machine 32 can be damaged when serious, it is therefore desirable to by load shedding, etc. oil machine 32 close to
During dead halt, load is reconnected, so that alternating current becomes the AC power for base station equipment power supply.Control module 37 is by making electricity
The electric current that the DC output end 351 of source feed unit 35 exports is gradually decrease to power supply unit closing, to realize that load is unloaded
Remove.
502nd, oil machine is closed, and starts timer.
Specifically, the time of timer can according to set using the model of oil machine 32, the oil machine 32 of different model
Close（Shut down）The time that process needs is different.
503rd, when timer time arrives, power supply unit is opened.
Open power supply unit 35 and loaded with realizing to connect to alternating current 31.
During being powered using alternating current 31 for base station equipment, it may occur however that the problem of 31 scarce capacity of alternating current, such as lack
Mutually or output voltage, electric current or frequency cannot reach that control module 37 is default to be met to base station equipment power demands
Value, at this moment, if the load of connection does not change, the electric current on 31 circuit of alternating current will increase, more than on 31 circuit of alternating current
During the maximum current that the current limiter of setting can bear, current limiter can cut off 31 circuit of alternating current, so as to cause alternating current 31 to power off.Cause
This needs to perform following step 504, to prevent alternating current 31 from being powered off because of overload.
504th, when alternating current scarce capacity, reduce the electric current that the DC output end of power supply unit exports.
Specifically, the load that can reduce alternating current 31 by performing the step and be connected, ensures the power supply of 31 low-load of alternating current.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should using the scope of the claims as
It is accurate.
Claims (7)
1. a kind of base station electric power system, including multichannel AC power supply and control module, it is characterised in that further include rectification module and
DC-dc conversion module；
Rectification module, has ac input end and the first DC output end, and the ac output end of AC power described in each road is in parallel
It is electrically connected afterwards with the ac input end, the rectification module is used to the alternating current inputted from the ac input end being converted into
Direct current with first voltage, exports from first DC output end；
DC-dc conversion module, has the first direct-flow input end and the second DC output end, the first DC output end electricity
First direct-flow input end is connected, DC-dc conversion module is used to the direct current with the first voltage being converted into
Direct current with second voltage, exports from second DC output end to power to base station equipment；
Control module, for controlling, at least the AC power is turned on and off all the way；
The multichannel AC power supply includes alternating current and the first oil machine；The control module, for controlling first oil machine to open
Or close；
The base station electric power system further includes power supply unit, it has the 3rd direct current output being electrically connected with base station equipment
End, and the second direct-flow input end being electrically connected with second DC output end, the power supply unit are used for the tool
The direct current for having second voltage is converted into the direct current with given voltage needed for the base station equipment, from the 3rd direct current
Output terminal exports；
The control module is additionally operable to control the current value of the 3rd DC output end output；
When alternating current ability is sufficient and first oil machine has turned on, make the 3rd DC output end of the power supply unit defeated
The electric current gone out is gradually decrease to the power supply unit and closes；
First oil machine is closed, and starts timer；
When the timer time arrives, the power supply unit is opened.
2. base station electric power system according to claim 1, it is characterised in that the AC power further includes the second oil machine；
The control module, for controlling being turned on and off for second oil machine.
3. base station electric power system according to claim 1 or 2, it is characterised in that further include storage battery, have and described the
The charging end that three DC output ends are electrically connected, and the discharge end being electrically connected with the base station equipment, the storage battery is used for will be logical
The direct current with the given voltage for crossing the charging end is converted into electric energy storage, or the electric energy of storage is passed through
Discharge end is exported to the base station equipment；
The control module is used for the state for detecting the storage battery.
4. base station electric power system according to claim 1, it is characterised in that the rectification module is bridge-type halfwave rectifier electricity
Road or full-wave bridge rectifier circuit.
5. a kind of multichannel AC power-supply switching method, it is characterised in that for the multichannel AC power supply in the electric power system of base station
Switch over, the base station electric power system further includes：Rectification module, DC-dc conversion module, power supply unit and electric power storage
Pond；
Be electrically connected after the ac output end parallel connection of AC power described in each road with the rectification module, the rectification module with it is described
DC-dc conversion module is electrically connected, and the DC-dc conversion module is electrically connected with the power supply unit, the electricity
The DC output end of source feed unit is electrically connected with the storage battery；The multichannel AC power supply includes alternating current and oil machine；
The described method includes：
When mains failure and discharged or defective battery, it is gradually reduced the electric current that the DC output end of the power supply unit exports
Closed to the power supply unit；
The oil machine is opened, and starts timer；
When the timer time arrives, the power supply unit is opened；
When alternating current ability is sufficient and the oil machine has turned on, the electric current that exports the DC output end of the power supply unit
The power supply unit is gradually decrease to close；
The oil machine is closed, and starts the timer；
When the timer time arrives, the power supply unit is opened.
6. multichannel AC power-supply switching method according to claim 5, it is characterised in that further include：When the oil machine energy
When power is insufficient, reduce the electric current that the DC output end of the power supply unit exports.
7. multichannel AC power-supply switching method according to claim 5, it is characterised in that further include：When city's electric energy
When power is insufficient, reduce the electric current that the DC output end of the power supply unit exports.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105896723B (en) * | 2016-04-29 | 2018-03-30 | 浪潮集团有限公司 | A kind of emergency power supply and a kind of emergency system |
| CN107065632A (en) * | 2017-06-15 | 2017-08-18 | 数码辰星科技发展（北京）有限公司 | A kind of electric power management circuit and system |
| CN111725885A (en) * | 2020-07-22 | 2020-09-29 | 辽宁凯信工业技术工程有限公司 | Intelligent power-switching and 5G base station standby power supply system |
| CN112104064A (en) * | 2020-09-10 | 2020-12-18 | 陕西疆晨信息科技有限公司 | Base station power supply control method, device, equipment and storage medium |
| CN114336907A (en) * | 2021-12-09 | 2022-04-12 | 华人运通(江苏)技术有限公司 | Charging control method, device, equipment and medium for charging pile |
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| CN201312129Y (en) * | 2008-08-06 | 2009-09-16 | ***通信集团甘肃有限公司 | Mobile edge base station power supply system |
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| CN202178611U (en) * | 2011-08-10 | 2012-03-28 | 新疆立昂电信技术有限公司 | Power supply system of three-stage safety communication base station |
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