CN201549892U - DC power supply control system - Google Patents

DC power supply control system Download PDF

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Publication number
CN201549892U
CN201549892U CN2009202470487U CN200920247048U CN201549892U CN 201549892 U CN201549892 U CN 201549892U CN 2009202470487 U CN2009202470487 U CN 2009202470487U CN 200920247048 U CN200920247048 U CN 200920247048U CN 201549892 U CN201549892 U CN 201549892U
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CN
China
Prior art keywords
direct current
voltage
power supply
supply control
equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2009202470487U
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Chinese (zh)
Inventor
秦光泽
靳松
张路
彭广香
王兵
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BEIJING CHUANGHE CENTURY TELECOMMUNICATION TECHNOLOGY CO., LTD.
Original Assignee
Beijing Chuanghe Century Communication Technology Co Ltd
China Mobile Communications Group Co Ltd
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Filing date
Publication date
Application filed by Beijing Chuanghe Century Communication Technology Co Ltd, China Mobile Communications Group Co Ltd filed Critical Beijing Chuanghe Century Communication Technology Co Ltd
Priority to CN2009202470487U priority Critical patent/CN201549892U/en
Application granted granted Critical
Publication of CN201549892U publication Critical patent/CN201549892U/en
Anticipated expiration legal-status Critical
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

The utility model relates to a DC power supply control system which comprises a renewable energy source power supply unit and a commercial power supply unit, wherein an output voltage of the renewable energy source power supply unit is higher than an output voltage of the commercial power supply unit; and the renewable energy source power supply unit is connected in parallel with a DC output end of the commercial power supply unit. The DC power supply control system can solve defect of providing the renewable energy source power supply for the DC load of the base station in the prior art and realize to carry out DC power supply on the load with lower cost.

Description

The direct current supply control system
Technical field
The utility model relates to the communication power supply field, is specifically related to a kind of direct current supply control system of utilizing the nature renewable energy to carry out direct current supply.
Background technology
Existing wind generator system is made of several parts such as wind-driven generator (hereinafter to be referred as blower fan), control circuit, storage battery dedicated group, existing mode of operation is to give storage battery dedicated charging with blower fan earlier, after this battery pack is full of, control circuit is linked into this battery pack one side to load, is electric by this battery pack; When this battery pack is used a period of time, after voltage was lower than threshold value, control circuit disconnected load, stopped to be electric, or switched back the original system power supply.
If with existing technical scheme is that existing base station is equipped with renewable energy system (as wind power generation), will has following problem and occur:
1, existing base station has been equipped with battery pack, and its effect is to continue to provide electric energy for load in mains failure.If give blower fan control with this battery pack, if mains failure when not having wind so, load will quit work, in view of this can only provide the reserve battery group for wind generator system, but this will increase the integral body investment of base station again, and the space and the load-bearing of existing machine room all proposed new requirement.
2, blower fan reserve battery group will frequently discharge and recharge when wind is arranged, and this has not only seriously shortened the life-span of battery, has also produced extra heat simultaneously, has increased the load of air-conditioning in the machine room, has wasted civil power.
3, in the time of wind, blower fan electric power system and mains-supplied system can often switch, and this switching may cause the sudden strain of a muscle of load voltage to fall, and is unfavorable to the life-span and the stable operation of load.
4, the operating voltage of load can change along with the variation of blower fan battery voltage, and this life-span and stable operation to load is also unfavorable.
5, existing this wind generator system is installed, must transform original electric power system, rectifier is placed under the management of power-supply controller of blower fan, load is reconnected on the power-supply controller of blower fan, these work will cause the load interruption of work.
The utility model content
The purpose of this utility model is to be that the base station is equipped with the problem that regenerative resource power supply exists at prior art, and a kind of direct current supply control system of utilizing the nature regenerative resource is provided, and can be the DC load power supply of base station.
To achieve these goals, the utility model provides a kind of direct current supply control system, comprise: regenerative resource power supply equipment and mains-supplied equipment, wherein, the output voltage of this regenerative resource power supply equipment is higher than the output voltage of this mains-supplied equipment, and is connected in parallel on the dc output end of mains-supplied equipment.
Wherein, regenerative resource can comprise wind energy, solar energy, tidal energy.
Preferably, mains-supplied equipment can comprise an AC/DC changeover switch and the direct current bus-bar that is connected with load, the output of regenerative resource power supply equipment and the dc output end of rectifier are connected in parallel on this direct current bus-bar, be this DC load power supply, load can comprise the DC equipment, storage battery of base station etc.
Preferably, rectifier can comprise: detection module, be used to detect the voltage in the load, and compare with the magnitude of voltage of setting; Pulse width modulation module is used for increasing the PWM duty ratio when the voltage that this detection module detects is lower than the magnitude of voltage of setting, makes the magnitude of voltage of output voltage to this setting; Otherwise reduce the PWM duty ratio, make output voltage be reduced to the magnitude of voltage of this setting.
Preferably, rectifier can be-48 volts of DC power-supply system, and supply district is-40~-54 volts.
Preferably, the output voltage of regenerative resource power supply equipment can be-55~-64 volts.
Wherein, regenerative resource power supply equipment can comprise renewable energy power generation machine and renewable energy source adapter, the renewable energy source adapter can comprise the three-phase commutation bridge that links to each other with the renewable energy power generation machine, and the DC/DC transducer that links to each other with this three-phase commutation bridge.
Three-phase commutation bridge can adopt the three-phase bridge full-wave rectifying circuit, is connected with the renewable energy power generation machine, and the three-phase alternating current that the renewable energy power generation machine is sent converts direct current to.
The input voltage of three-phase commutation bridge can lie prostrate alternating current for 0-20, and output voltage 0-20 lies prostrate direct current; The output voltage of described DC/DC transducer is-56 volts.
The direct current supply control system of various embodiments of the present invention do not need to be regenerative resource power supply equipment configuration reserve battery group, but the existing battery pack even load in shared base station can improve resource utilization and save cost.Because the output voltage of regenerative resource power supply equipment is higher than the output voltage of base station power supply unit among the present invention, and is connected in parallel on the dc output end of this base station power supply unit, so the electric energy that regenerative resource produces will preferentially be used, and can power for load.In addition, also some embodiment describes in detail various device, for example the rectifier in the power supply unit of base station detects by the output voltage to regenerative resource on the bus-bar, adjust self amount of power supply, to realize stable output (being automatic current equalizing) to load bulk supply amount to load.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is the utility model direct current supply control system embodiment one structural representation;
Fig. 2 is the utility model direct current supply control system embodiment two structural representations;
Fig. 3 is the wind energy adapter schematic diagram of the renewable energy source device of the utility model direct current supply control system;
Fig. 4 is the DC/DC transducer schematic diagram of the renewable energy source device of the utility model direct current supply control system.
Embodiment
Embodiment one
Fig. 1 is the utility model direct current supply control system embodiment one structural representation.As shown in Figure 1, present embodiment comprises regenerative resource power supply equipment and existing base station mains-supplied equipment, wherein, the output voltage of regenerative resource power supply equipment is higher than the output voltage of base station mains-supplied equipment, and is connected in parallel on the dc output end of mains-supplied equipment.As Fig. 1, the regenerative resource of present embodiment is a wind energy, and wind energy is become direct current by wind-driven generator (abbreviation blower fan) and wind energy adapter (ac-dc conversion), is connected in parallel on the output of the existing mains-supplied equipment in base station.As Fig. 1, the base station power supply unit of present embodiment is existing mains-supplied equipment, and civil power is become direct current by rectifier, and the direct current parallel connection of exporting with wind energy on the direct current bus-bar, one is all DC load power supplies such as storage battery, base station equipment, specifically can be referring to Fig. 2.
The electric power supply control system difference with the prior art of present embodiment is, needn't be regenerative resource power supply equipment disposition reserve battery group, do not change the structural relation of the original electric power system in base station, but by voltage transformation and control, the alternating current that wind-driven generator is sent becomes direct current through adapter, output voltage is set at the output voltage that is higher than base station mains-supplied equipment, the dc output end (also equal simultaneously and on batteries) that is directly parallel in rectifier is then worked together, because the blower fan output voltage is a little more than the output voltage of base station mains-supplied equipment, so the electric energy that blower fan sends will preferentially be used.
It will be understood by a person skilled in the art that regenerative resource can also comprise other renewable energy resources except that wind energy, as solar energy, tidal energy etc., can be the DC equipment power supply with the electric energy that sends by same mode access base station.
Embodiment two
Fig. 2 is the utility model direct current supply control system embodiment two structural representations.As shown in Figure 2, base station power supply unit (being existing mains-supplied equipment) comprises a rectifier, rectifier inside comprises AC/DC transducer and the direct current bus-bar that is connected with load, the regenerative resource power supply equipment of present embodiment is wind energy plant, the dc output end of its output voltage and this AC/DC transducer is connected in parallel on the direct current bus-bar, is the DC load power supply of storage battery and base station.
In the present embodiment, rectifier adopts-48 volts of electric power systems, be 0 volt (following volt is abbreviated as V) and-48 volts as the direct current bus-bar of rectifier among Fig. 2, but its actual supply district is-40 to-54 volts.As shown in Figure 2, the AC/DC transducer converts the civil power of input-direct current of 48V to, and is transported on the direct current bus-bar.The DC equipment of base station all is connected with the direct current bus-bar with storage battery, obtains electric energy from the direct current bus-bar.At this moment the DC equipment of base station and storage battery all are the loads of AC/DC transducer, and the AC/DC transducer powers to the load by the direct current bus-bar.
Wind energy plant comprises wind energy adapter and wind-driven generator.The wind energy adapter comprises three-phase commutation bridge and DC/DC transducer.Three-phase commutation bridge becomes direct current to the three-phase alternating current that wind-driven generator sends.Because the wind-force size is probabilistic, so this direct voltage is also uncertain.The DC/DC transducer is connected with three-phase commutation bridge, and is that the DC/DC transducer becomes to determine uncertain voltage transitions and a little more than the voltage of rectifier DC bus-bar.Rectifier employing-48V electric power system in the present embodiment, actual output voltage are-54V that therefore, the output of wind energy plant is set to-55~-64 volts, a little more than the output of rectifier.
Present embodiment is that the alternating current that wind-driven generator sends is become direct current through the wind energy adapter, output voltage is being set at-55~-64V, be directly parallel in the dc output end of rectifier then, since the blower fan output voltage a little more than the output voltage of rectifier (54V), thus the electric energy that sends of blower fan will preferentially be used.
In the present embodiment, rectifier can comprise: detection module, be used to detect the voltage in the load, and compare with the magnitude of voltage of setting, be-54 volts as the magnitude of voltage of setting; Pulse width modulation module is used for increasing the PWM duty ratio when the voltage that described detection module detects is lower than the magnitude of voltage of this setting, makes output voltage be increased to the magnitude of voltage of setting; Otherwise reduce the PWM duty ratio, make output voltage be reduced to the magnitude of voltage of this setting.Rectifier is applied to the voltage in the load and adjusts inner pulse width modulator (PWM) duty ratio by detecting it, adjust duty ratio, because this pace of change is exceedingly fast, and output voltage is minimum in the scope that set point fluctuates up and down, therefore can be considered the voltage that rectifier is applied in the load is stabilized on the set point, output voltage is remained unchanged, for using the load of electric energy, the unsteadiness of wind energy output will be overcome, equipment life and stable operation are all unaffected, have the advantage of stable output.
Rectifier in the present embodiment has the function of adjusting its power output according to the load size in real time.The output that the electric energy that comes from wind energy inserts rectifier equals load concerning rectifier power has diminished, the output of rectifier just will be sent the increase of electric energy and reduce along with blower fan, the also corresponding minimizing of the civil power that is consumed, because the unsteadiness of wind energy, the power that blower fan sends electric energy is suddenly big or suddenly small variation at any time, therefore rectifier can be adjusted its power output automatically and neglect the little big variation of neglecting thereupon, this is dynamic, real-time, as not need a human intervention process, has the advantage of automatic current equalizing.
As shown in Figure 2, K1, K2 are whether the electric energy that the control wind-driven generator sends inserts the switch that has the mains-supplied system now.K3, K4 are the switches that control storage battery and base station DC load etc. insert electric power system.For guaranteeing that (54V), input AC (interchanges) voltage range of three-phase commutation bridge is 0~20V to the wind energy plant output voltage, and exporting DC (direct current) voltage range is 0~20V, and the output voltage of DC/DC transducer is set to-56V a little more than the output voltage of rectifier.
The utility model the various embodiments described above rely on the mains-supplied system of existing communication base station, it is not being made under the situation of any change, the electric energy that wind-driven generator is sent becomes behind the direct current directly in conjunction with (parallel connection) output to the rectifier of mains-supplied system, at this moment the output current of rectifier will send the increase of electric energy and reduce along with blower fan, the also corresponding minimizing of the civil power that is consumed, promptly do not influencing original system work, do not disturb civil power, do not reduce power supply quality, do not influence under the situation of equipment life wind energy is offered load, and realize purpose of energy saving; And owing to the output voltage of output voltage a little more than the mains-supplied system, regenerative resource will preferentially be used, thereby reduce the consumption of civil power.
Embodiment three
Fig. 3 is the wind energy adapter schematic diagram of the renewable energy source device of the utility model direct current supply control system, and Fig. 3 is a three-phase commutation bridge schematic diagram among Fig. 2.Fig. 4 is the DC/DC transducer schematic diagram among this Fig. 2.
As shown in Figure 3, three-phase commutation bridge can adopt the three-phase bridge full-wave rectifying circuit.Three-phase commutation bridge is connected with wind-driven generator, and the three-phase alternating current that wind-driven generator is sent converts direct current to.As shown in Figure 4, the DC/DC conversion portion adopts high frequency push-pull type translation circuit to realize that the push-pull type translation circuit belongs to the double-end type translation circuit.Its high frequency transformer works in the both sides of magnetic hysteresis loop, is a kind of simplicity of design, the rational circuit of working, and the scope of application is wider.Its typical circuit as shown in Figure 4.Switching transistor VT1, VT2 are encouraged alternate conduction and are ended by base drive circuit, and input direct voltage Ui is transformed into the high frequency square wave alternating voltage.During the VT1 conducting, Ui is added on the elementary winding N1 of transformer T1 by VT1.Because the effect of transformer, therefore the transistor VT2 that ends will put on 2 times input voltage, i.e. 2Ui.When base drive disappeared, VT1, VT2 pipe all ended.The voltage that its collector electrode applies is input voltage Ui.Following half period, the VT2 conducting, VT1 ends, and VT1 applies 2 times input voltage, and is that two pipes end, and next cycle restarts.For guaranteeing that (54V), the input AC voltage of three-phase commutation bridge can be set to 0~20V to the wind energy plant output voltage, and output dc voltage is 0~20V, and the output voltage of DC/DC transducer is set to-56V a little more than the output voltage of rectifier.
Compared with prior art, technological merit of the present utility model has following several:
1, in original mains-supplied loop, electric energy input communication base station that regenerative resources such as wind-driven generator are produced, because voltage is a little more than original mains-supplied loop, thus will preferentially be used, thus the use amount of civil power reduced, realize energy-conservation target.
2, do not need for regenerative resource is equipped with the reserve battery group, but existing battery pack in the shared base station, the utilance that this has improved resource has reduced overlapping investment, has saved investment, has also reduced the requirement to machine room space and load-bearing simultaneously.
3, original rectifier detects management, the life-span that guarantees battery pack does not change, the supply power voltage that proof load receives does not change, and work as mains failure, when battery pack begins to electric, if at this time regenerative resource is relatively good, the discharge time of battery pack can be prolonged greatly.
4, do not had blower fan reserve battery group frequently to discharge and recharge the additional heat of generation, do not increased the load of air-conditioning in the machine room.
5, avoid the sudden strain of a muscle that regenerative resource power supply equipment and mains-supplied equipment often switch the load voltage that causes to fall, helped the life-span and the stable operation of proof load.
6, the operating voltage of having avoided load machine battery group voltage fluctuation and changing with the wind helps the life-span and the stable operation of proof load.
7, can well combine with existing mains-supplied equipment, do not change the structural relation of existing base station power supply, renewable energy resources power supply unit can be come in seamless access, the electric energy that the renewable energy resources produce is preferentially used, the electric energy that rectifier produces according to the renewable energy resources is dynamically adjusted the use amount of civil power, concerning load with the as broad as long (voltage constant and not do not dodge of original mains-supplied, do not switch), power quality to the base station power supply does not reduce, can not cause the interruption of loaded work piece, keep the management ground invariant position of rectifier simultaneously, keep the stability of whole base station electric power system all loads.Life-span to storage battery does not have influence yet.
In case 8 renewable energy resources power supply unit power packs break down, and are equal to the renewable energy resources and are output as 0, rectifier will return to the power consumption of original civil power, can not bring any negative effect to the power supply unit and the powered operation of base station.
It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the spirit and scope of technical solutions of the utility model.

Claims (10)

1. direct current supply control system, it is characterized in that, comprise regenerative resource power supply equipment and mains-supplied equipment, wherein, the output voltage of described regenerative resource power supply equipment is higher than the output voltage of described mains-supplied equipment, and is connected in parallel on the dc output end of described mains-supplied equipment.
2. direct current supply control system according to claim 1 is characterized in that described regenerative resource comprises wind energy, solar energy, tidal energy.
3. direct current supply control system according to claim 1, it is characterized in that, described mains-supplied equipment comprises an AC/DC changeover switch and the direct current bus-bar that is connected with load, the output of described regenerative resource power supply equipment and the dc output end of described rectifier are connected in parallel on the described direct current bus-bar, be described electric, described load comprises DC equipment, the storage battery of base station.
4. direct current supply control system according to claim 3 is characterized in that, described rectifier comprises:
Detection module is used to detect the voltage in the described load, compares with the magnitude of voltage of setting;
Pulse width modulation module is used for increasing the PWM duty ratio when the voltage that described detection module detects is lower than the magnitude of voltage of described setting, makes the magnitude of voltage of output voltage to described setting; Otherwise reduce the PWM duty ratio, make output voltage be reduced to the magnitude of voltage of described setting.
5. direct current supply control system according to claim 3 is characterized in that, described rectifier is-48 volts of DC power-supply system, and supply district is-40~-54 volts.
6. direct current supply control system according to claim 1 is characterized in that, the output voltage of described regenerative resource power supply equipment is-55~-64 volts.
7. according to each described direct current supply control system among the claim 1-6, it is characterized in that described regenerative resource power supply equipment comprises renewable energy power generation machine and renewable energy source adapter.
8. direct current supply control system according to claim 7 is characterized in that, described renewable energy source adapter comprises the three-phase commutation bridge that links to each other with described renewable energy power generation machine, and the DC/DC transducer that links to each other with described three-phase commutation bridge.
9. direct current supply control system according to claim 8, it is characterized in that, described three-phase commutation bridge adopts the three-phase bridge full-wave rectifying circuit, is connected with described renewable energy power generation machine, and the three-phase alternating current that the renewable energy power generation machine is sent converts direct current to.
10. direct current supply control system according to claim 8 is characterized in that, the input voltage of described three-phase commutation bridge is a 0-20 volt alternating current, and output voltage 0-20 lies prostrate direct current; The output voltage of described DC/DC transducer is-56 volts.
CN2009202470487U 2009-11-17 2009-11-17 DC power supply control system Expired - Lifetime CN201549892U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102545299A (en) * 2010-12-08 2012-07-04 中国电信股份有限公司 Solar photovoltaic power generation system and power supply method for communication
CN104638759A (en) * 2015-03-12 2015-05-20 成都砾奇能机电设备有限公司 Power supply device for unattended base station
CN104810913A (en) * 2015-05-22 2015-07-29 蚌埠市徽泰电气自动化有限公司 Photovoltaic power generation device based on commercial power compensation and water pump system of photovoltaic power generation device
CN105048443A (en) * 2015-08-27 2015-11-11 北京宏光星宇科技发展有限公司 Shared storage battery pack based distributed DC power supply system and method
CN106099901A (en) * 2013-12-18 2016-11-09 郭淑华 Communication base station solar DC electricity-generating control method
CN108574330A (en) * 2018-05-18 2018-09-25 云南电网有限责任公司电力科学研究院 A kind of power supply system based on shared electric power tower communication base station
CN110311367A (en) * 2019-07-24 2019-10-08 中国工商银行股份有限公司 Power supply unit and power supply system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102545299A (en) * 2010-12-08 2012-07-04 中国电信股份有限公司 Solar photovoltaic power generation system and power supply method for communication
CN102545299B (en) * 2010-12-08 2014-04-09 中国电信股份有限公司 Solar photovoltaic power generation system and power supply method for communication
CN106099901A (en) * 2013-12-18 2016-11-09 郭淑华 Communication base station solar DC electricity-generating control method
CN104638759A (en) * 2015-03-12 2015-05-20 成都砾奇能机电设备有限公司 Power supply device for unattended base station
CN104810913A (en) * 2015-05-22 2015-07-29 蚌埠市徽泰电气自动化有限公司 Photovoltaic power generation device based on commercial power compensation and water pump system of photovoltaic power generation device
CN105048443A (en) * 2015-08-27 2015-11-11 北京宏光星宇科技发展有限公司 Shared storage battery pack based distributed DC power supply system and method
CN105048443B (en) * 2015-08-27 2018-11-20 北京宏光星宇科技发展有限公司 A kind of distributing DC power-supply system and method based on shared battery group
CN108574330A (en) * 2018-05-18 2018-09-25 云南电网有限责任公司电力科学研究院 A kind of power supply system based on shared electric power tower communication base station
CN108574330B (en) * 2018-05-18 2021-04-13 云南电网有限责任公司电力科学研究院 Power supply system based on shared power iron tower communication base station
CN110311367A (en) * 2019-07-24 2019-10-08 中国工商银行股份有限公司 Power supply unit and power supply system

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Address after: 100032 Beijing Finance Street, No. 29, Xicheng District

Patentee after: China Mobile Communications Group Corp.

Patentee after: BEIJING CHUANGHE CENTURY TELECOMMUNICATION TECHNOLOGY CO., LTD.

Address before: 100032 Beijing Finance Street, No. 29, Xicheng District

Patentee before: China Mobile Communications Group Corp.

Patentee before: Beijing Chuanghe Century Communication Technology Co., Ltd.

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Granted publication date: 20100811