CN104242810A - Embedded type solar direct-current power supply system - Google Patents
Embedded type solar direct-current power supply system Download PDFInfo
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- CN104242810A CN104242810A CN201310232125.2A CN201310232125A CN104242810A CN 104242810 A CN104242810 A CN 104242810A CN 201310232125 A CN201310232125 A CN 201310232125A CN 104242810 A CN104242810 A CN 104242810A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention relates to an embedded type solar direct-current power supply system. The embedded type solar direct-current power supply system comprises a solar cell array, storage cells and a direct-current load, and is characterized in that an embedded type controller is connected between the solar cell array and the direct-current load in series. The embedded type controller is mainly composed of a PV input part, a BUCK circuit, a CPU control unit, a sampling device, an anti-backswing diode and a direct-current electric quantity metering system. According to the embedded type solar direct-current power supply system, solar green resources are utilized, an embedded type base station photovoltaic power supply system is provided for a base station area with commercial power supply, the consumption of normalization energy and secondhand energy of a base station is greatly reduced, and the power supply safety of the base station is improved.
Description
Technical field
The present invention relates to a kind of solar energy equipment, specifically a kind of solar DC electric power system.
Background technology
Along with progress and the growth in the living standard of society, people are more and more large to the dependence of electricity, although the production capacity of electricity is in continuous increase, are in the situation that supply falls short of demand all the time.For increasingly competitive global telecommunications industry, the ratio that its electricity charge account for operation cost is very high, and according to statistics, in the good region of electrical network, the ratio that the electricity charge account for whole telecom operation cost is about 50%; And in the poor area of electrical network, as areas such as Africa, Asia, need use diesel generating set in support or main power source, add the maintenance cost of fuel cost and generating set, its electric cost is about 3 times of General Electric Network power supply cost.Global communications network is made up of millions of communication sites, and in developed regions, city, existing website adopts traditional energy and power supply system, there is the problem that energy conversion efficiency is low, energy consumption is large; In under-developed areas such as rural areas, generally adopt conventional diesel generation technology, there is the problems such as the Frequent Troubles that converting electrical energy efficiency is on the low side, long-play brings equally, have impact on the stability of communication service, add station and safeguard frequency, O&M cost is high.
A few days ago, the Ministry of Industry and Information Technology of China has issued " communication industry " 12 " development plan ", point out " to Green Development theory be carried out in energy-saving and emission-reduction, environmental protection etc. ... rationally adopt the regenerative resources such as scene ... "
Traditional solar energy photovoltaic direct current electric power system, being mainly used in the power supplies such as the communication base station of remote areas without electricity, machine room at present, is the photoelectric effect by solar module, converts solar energy into direct current energy and the equipment of storage.Tradition solar electric power supply system (as shown in Figure 1), primarily of the composition such as solar cell array, controller for solar, batteries, DC load that solar module is formed, controller for solar is electrically connected with solar cell array, batteries, DC load respectively.During work, when there being illumination, solar energy is converted to electric energy, when the load of solar cell array power ratio is large, by controller for solar powering load, accumulators group charging simultaneously; And when unglazed photograph, solar cell array power ratio bearing power hour, controller for solar is by batteries powering load.Controller for solar, by the adjustment of system input-output power and distribution, realizes the various controlling functions of solar energy photovoltaic system.
The application cost of tradition solar energy base station electric power system is higher, and its main cause is:
One, must energy storage battery be equipped with, ensure the power supply at night and the power supply of 2-3 days overcast and rainy situations.The cost compare of storage battery is high, in the useful life under its discharge and recharge every day condition, is only 2 to three years.
Two, in order to ensure overcast and rainy power supply, the configuration of photovoltaic module must can meet the ability being full of storage battery within the time, and therefore the installed capacity of assembly is generally the 8-10 of load of base station power doubly.
Three, arrangement of components is higher, and due to weather reason, under continuous sunny condition, storage battery is full of, and assembly can be far longer than the power consumption of load by generated output, cause most of generating capacity of assembly to be wasted, increase the cost of electric energy output.
Because the application cost of photovoltaic system is very high, the knot only application of current photovoltaic system in communication base station system is still confined to the areas without electricity of rigid demand.How on the whole nation and even global communication base station, to apply economically viable solar electric power supply system, be a relevant research topic.
Summary of the invention
There are nearly 1,900,000 communication base stations in China, and wherein the overwhelming majority has commercial power supply.The object of the invention is to, utilize the green resource of the sun, for the area, base station having commercial power supply, provide a kind of embedded base station photovoltaic power supply system, to routinize the consumption of the energy and secondary energy sources significantly to reduce base station, and improve the fail safe that base station powers.
The present invention is achieved in that
The present invention is based on following thinking: because base station has had civil power to ensure as power supply, therefore can consider to allow photovoltaic system not as protection electric power system, only as the means of energy-saving and emission-reduction--this system can increase photovoltaic module and controller in original electric power system, and does not need additionally to use energy-storage system.
The solar DC electric power system of the present invention is achieved in that
This system has solar cell array, storage battery, DC load, it is characterized in that: an embedded controller of contacting between solar cell array and DC load.
Described embedded controller, primarily of PV importation, BUCK circuit, CPU control unit, sampling apparatus, anti-recoil diode, direct current measurement metering system composition.System is sampled to the voltage and current that PV inputs, and carries out FEEDBACK CONTROL through CPU control unit, and the instant input terminal voltage regulating main power BUCK circuit, realizes maximum power point tracking function.Simultaneously, system gathers output current by sampling system, feeds back to cpu controller unit, is regulated the output voltage of main power BUCK circuit by CPU control unit, ensure the voltage of output voltage a little more than the former base station DC power-supply system in parallel with it, the preferential electricity using photovoltaic power supply system.Anti-recoil diode is installed on the output of controller, is connected with current sampling system--and its Main Function prevents photovoltaic system under non-illuminated conditions, and original communication switch power system carries out reverse charge to photovoltaic power supply system.
During workpiece, the direct current (about about 70V) that solar cell array produces enters embedded controller, embedded controller first makes solar power generation be operated in maximum power state by the maximum power point tracking function of self, power to equipment DC load, supply power voltage is the voltage (about 53.5V) of the original electric power system of automatic tracing.Because the capacity configuring photovoltaic module is less than DC load power, whole solar power generation will be used to DC load, and the former electric power system driven by civil power is supplied by the part of all the other deficiencies.This system achieves the function utilizing solar energy to power to DC load, reduces the use of civil power, namely decreases the discharge of the toxic and harmfuls such as carbon dioxide isothermal chamber gas that fossil energy makes and nitrogen oxide.
The configuration of system is according to the weather conditions of locality, and the installed capacity of normal light photovoltaic assembly and the ratio of system dc load are about 1: 1.Which decrease the arrangement of components at single station, and the generated output of assembly is less than the DC load power of system, can ensure that system is run all the time under maximum power output condition, the energy output of system can maximize.Because photovoltaic system does not carry out punching electricity to storage battery, Conventional communication adopts the facility of the accumulator cell charging and discharging function of photovoltaic controller to be saved, and farthest reduces costs.
This system has the following advantages:
equipment only increases photovoltaic module and controller part, not containing storage battery, and simple installation.
system is embedded, on original system without any impact.
be formula between equipment and civil power, but not suitching type, the MPPT function of controller ensures the maximum output of photovoltaic, and insufficient section civil power supplements.
rationally determine photovoltaic module capacity, the generating capacity of Assurance component is less than the power consumption of equipment, guarantees assembly maximum generating watt.
during mains failure, if by day, photovoltaic module can generate electricity, and reduces original battery discharging degree of depth, prolonging service life of battery on the one hand, can extend the power failure cruising time of electric power system on the other hand.
system adopts direct current supply, compared with original Alternating Current Power Supply, avoids the power loss exchanging and turn direct current on the one hand, avoids the various surcharges of civil power on the other hand.System is improved rear total electricity consumption and will obviously be reduced.
namely the energy-saving and emission-reduction amount of system is the energy output of system, is convenient to mobile computing and determines energy-saving and emission-reduction index.
Accompanying drawing explanation
Fig. 1. the structural representation of traditional solar electric power supply system
Fig. 2. the position of embedded controller in traditional solar electric power supply system of the present invention
Fig. 3. the photovoltaic module of the present invention and the circuit theory schematic diagram of controller
Fig. 4. the electrical block diagram of the present embodiment
Embodiment
Describe an embodiment below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 2 shows the position of embedded controller in traditional solar electric power supply system of the present invention
On the basis of traditional solar electric power supply system, namely mainly contain the solar electric power supply system of solar cell array, storage battery, DC load composition, the present invention is connected with an embedded controller between solar cell array and DC load.
Fig. 3 shows the photovoltaic module of the present invention and the circuit structure principle of controller
The embedded controller of the present embodiment, primarily of PV importation, BUCK circuit, CPU control unit, sampling apparatus, anti-recoil diode, direct current measurement metering system composition.System is sampled to the voltage and current that PV inputs, and carries out FEEDBACK CONTROL through CPU control unit, and the instant input terminal voltage regulating main power BUCK circuit, realizes maximum power point tracking function.Simultaneously, system gathers output current by sampling system, feeds back to cpu controller unit, is regulated the output voltage of main power BUCK circuit by CPU control unit, ensure the voltage of output voltage a little more than the former base station DC power-supply system in parallel with it, the preferential electricity using photovoltaic power supply system.Anti-recoil diode is installed on the output of controller, is connected with current sampling system.
DC meter system is connected between anti-recoil system and DC load, total electricity, real-time power, voltage, current parameters that metering exports.
Digital display screen is connected with CPU control unit, can the input of display system and the relevant parameter such as voltage, electric current, power of output.Secondary power system can directly from photovoltaic module power taking, as the power supply of controller system itself.
Fig. 4 shows the circuit structure of the present embodiment
Certain DC load power is the communication base station of 2000W, and original electric power system is that 220V electric main is transformed to the direct current of 53.5V for equipment use by Switching Power Supply.For realizing the object utilizing clean energy resource energy-saving and emission-reduction, embedded solar electric power supply system is adopted to carry out energize portions.Embedded solar energy system adopts solar components and the 1000W embedded controller two of 2000Wp, one, ammeter.Photovoltaic module adopts specification to be 250Wp/ block.Amount to use 8 pieces, wherein every two pieces as one group, series connection, access embedded controller a unit (as in Fig. 4 left side embedded controller unit 1).According to this principle, 8 pieces of solar components are divided into four groups, access the input that two embedded controllers amount to four unit respectively.After the output-parallel of each unit of embedded controller, after DC meter, communication system original in base station is in parallel.So, then the installation of system is completed.When there being illumination, light energy conversion is electric energy by photovoltaic module, and assembly exports the direct current of about 70V to controller.Controller uses maximum power electricity tracking function, regulates input voltage, makes assembly be in maximum power output state.With Time Controller by BUCK circuit, direct current (about 54V) supply load exported a little more than original switch power supply system voltage uses.Because voltage is a little more than the voltage of Switching Power Supply, can the proof load electricity that preferentially uses photovoltaic system to produce, and the part of deficiency, then provided by switch power supply system.When not having illumination resource, photovoltaic system does not work, and the electricity consumption of load is all provided by switch power supply system.Anti-recoil diode in controller, ensures that the electricity of Switching Power Supply can not spring back in photovoltaic system.This system achieves the function utilizing solar energy to power to DC load, reduces the use of civil power, namely decreases the discharge of the toxic and harmfuls such as carbon dioxide isothermal chamber gas that fossil energy makes and nitrogen oxide.
Claims (4)
1. embedded solar DC electric power system, has solar cell array, storage battery, DC load, it is characterized in that, an embedded controller of contacting between solar cell array and DC load;
Described embedded controller, mainly contain PV importation, BUCK circuit, CPU control unit, sampling apparatus, anti-recoil diode and direct current measurement metering system, system is sampled to the voltage and current that PV inputs, FEEDBACK CONTROL is carried out through CPU control unit, the input terminal voltage of instant adjustment main power BUCK circuit, realizes maximum power point tracking function; Simultaneously, system gathers output current by sampling system, feeds back to cpu controller unit, is regulated the output voltage of main power BUCK circuit by CPU control unit, ensure the voltage of output voltage a little more than the former base station DC power-supply system in parallel with it, the preferential electricity using photovoltaic power supply system; Anti-recoil diode is installed on the output of controller, is connected with current sampling system; DC meter system is connected between anti-recoil system and DC load.
2. embedded solar DC electric power system according to claim 1, is characterized in that: DC meter system is connected between anti-recoil system and DC load, total electricity, real-time power, voltage, current parameters that metering exports.
3. embedded solar DC electric power system according to claim 1, is characterized in that: digital display screen is connected with CPU control unit.
4. embedded solar DC electric power system according to claim 1, is characterized in that: secondary power system from photovoltaic module power taking, as the power supply of controller system itself.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310232125.2A CN104242810A (en) | 2013-06-13 | 2013-06-13 | Embedded type solar direct-current power supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310232125.2A CN104242810A (en) | 2013-06-13 | 2013-06-13 | Embedded type solar direct-current power supply system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017097131A1 (en) * | 2015-12-09 | 2017-06-15 | 中国银联股份有限公司 | Photovoltaic power generation system for supplying power for beacon base station |
| CN115912308A (en) * | 2022-11-24 | 2023-04-04 | 广东南方电信规划咨询设计院有限公司 | A photovoltaic plus mains power supply system for hybrid power supply to communication base station RRU |
-
2013
- 2013-06-13 CN CN201310232125.2A patent/CN104242810A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017097131A1 (en) * | 2015-12-09 | 2017-06-15 | 中国银联股份有限公司 | Photovoltaic power generation system for supplying power for beacon base station |
| CN115912308A (en) * | 2022-11-24 | 2023-04-04 | 广东南方电信规划咨询设计院有限公司 | A photovoltaic plus mains power supply system for hybrid power supply to communication base station RRU |
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Application publication date: 20141224 |