CN204836076U - Solar cell's maximum power point tracer - Google Patents
Solar cell's maximum power point tracer Download PDFInfo
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- CN204836076U CN204836076U CN201520606761.1U CN201520606761U CN204836076U CN 204836076 U CN204836076 U CN 204836076U CN 201520606761 U CN201520606761 U CN 201520606761U CN 204836076 U CN204836076 U CN 204836076U
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- maximum power
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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 utility model provides a solar cell maximum power point tracer, positive pole with a termination BUS capacitors of the biggest the 2nd solar energy component of magnitude of voltage cluster, another termination BUS capacitors's negative pole, BUS capacitors's both ends parallel connection has back level direct current - interchange converter, then not only can obtain independent the pursuit obtains the 2nd solar energy component cluster and all the other solar energy component cluster maximum power point, can reduce simultaneously ceiling voltage inductance of the same kind in the solar energy component cluster, the switch tube, devices such as diode, the device among the tracer has been practiced thrift, cost is reduced and loss, the efficiency of it is whole is improved, the plant bulk has been reduced.
Description
Technical field
The application relates to a kind of solar cell maximum power point tracking device.
Background technology
Obtain extensive along with new and renewable sources of energy in the whole world and develop rapidly, solar energy power generating obtains develop rapidly as a kind of clean energy resource, and is widely used.At present, in solar energy power generating application, mainly utilize inverter using the DC power supply of solar components string as input, direct current is transferred to AC regeneration to electrical network or be directly supplied to load.Inverter obtains fast development as the core devices of convertor assembly in new forms of energy and renewable energy system, develop and comprised photovoltaic DC-to-AC converter, energy storage inverter, solar charger etc., these and the matching used convertor assembly of solar components have a common feature must possess maximum power point tracking function exactly, export with the maximum power point obtaining solar components, this function generally relies on a boosting or reduction voltage circuit as hardware platform, is undertaken controlling and modulating by a controller with maximum power point tracking algorithm simultaneously.The generating voltage of maximum power point tracking energy detecting real-time solar components, and tracking presents nonlinear electric current and voltage value (VI), makes solar components be able to maximum power output, obtains maximum generation benefit.
Due to spatial limitation, radiation condition difference, solar components often appearance group string quantity, install towards differences such as, intensities of illumination, this just requires the maximum power point tracking device possessing multiple standalone feature in same inverter, connect different solar components inputs respectively, monitor the electric current and voltage value of each solar components, thus maximum power point tracking way usually increases along with power and increases, and usually possesses more than two-way.In common convertor assembly, multichannel maximum power tracing adopts booster circuit (BOOST) as conversion topologies, a kind of two-way maximum power point tracking topology as shown in Figure 1, the circuit realiration be made up of current sensor 10, inductance L 1, switching tube Q1, diode D1, second controller U1 falls solar components string 1 and is transformed to burning voltage, and obtains maximum power point output; The circuit realiration be made up of current sensor 20, inductance L 2, switching tube Q2, diode D2, second controller U2 falls solar components string 2 and is transformed to burning voltage, and obtains maximum power point output.Two cover circuit realize independently maximum power point tracking (MPP) respectively, same, as long as more the maximum power point tracking of multichannel adds more similar circuit and controller can realize.
But each road maximum power point tracking device of existing converter all needs to possess a road booster circuit and realizes, and just can reach the object that each road solar components string works alone.But each road maximum power point tracking device all needs the independently device such as inductance, switching tube, controller, adds cost, adds loss, reduces system effectiveness, and variator is made to need larger volume and weight ratio.
Utility model content
The application provides a kind of maximum power point tracking device of solar cell, can reduce the electronic component used when following the trail of the maximum power point of multichannel solar components string.
According to the first aspect of the application, the application provides a kind of solar cell maximum power point tracking device, comprise: at least one first solar components string, one end of each described first solar components string connects the first current sensor, the first inductance, the positive pole of the first diode and the positive pole of bus capacitor successively, the other end connects the source electrode of the first switching tube and the negative pole of bus capacitor, and the drain electrode of described first switching tube is connected between described first inductance and described first diode; The grid of described first switching tube is connected with the first controller; Also comprise: the second solar components string, the maximum power point voltage value of described second solar components string is more than or equal to the maximum power point voltage value of described first solar components; One end of described second solar components string connects the positive pole of the second current sensor and described bus capacitor, the negative pole of bus capacitor described in another termination successively; The two ends of described bus capacitor are connected in parallel to rear class DC-AC converter.
An embodiment, when the maximum power point voltage value of described second solar components string equals the maximum power point voltage value of described first solar components string, also comprise: switch, the two ends of described switch are connected with described first current sensor and described second current sensor respectively.
The solar cell maximum power point tracking device that the utility model provides, by the positive pole of a termination bus capacitor of the second maximum for magnitude of voltage solar components string, the negative pole of another termination bus capacitor, the two ends of bus capacitor are connected in parallel to rear class DC-AC converter, then not only can obtain independent trails and obtain the second solar components string and all the other the first solar components string maximum power points, the inductance on ceiling voltage one tunnel in solar components string can be reduced simultaneously, switching tube, the devices such as diode, save the device in follow-up mechanism, reduce costs and loss, improve whole efficiency, reduce plant bulk.
Accompanying drawing explanation
Fig. 1 is the structural representation of solar cell maximum power point tracking device of the prior art;
Fig. 2 is the structural representation of the solar cell maximum power point tracking device of the utility model embodiment;
Fig. 3 is the structural equivalents schematic diagram of solar cell maximum power point tracking device of the present utility model.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail below by embodiment.
In the embodiment of the present application, provide a kind of solar cell maximum power point tracking device, the electronic component used when the maximum power point of multichannel solar components string is followed the trail of can be reduced.
Please refer to Fig. 2, Fig. 2 is the structural representation of solar cell maximum power point tracking device of the present utility model.As shown in Figure 2, the solar cell maximum power point tracking device of the present embodiment can comprise: at least one first solar components string 1, one end of each first solar components string 1 connects the positive pole of the first current sensor 10, first inductance L 1, first diode D1 and the positive pole of bus capacitor C successively, the other end connects the source S of the first switching tube Q1 and the negative pole of bus capacitor C, and the drain D of the first switching tube Q1 is connected between the first inductance L 1 and the first diode D1.The grid G of the first switching tube Q1 is connected with the first controller U1.Be understandable that, the first controller U1 is the controller with maximum power point tracking algorithm, can control maximum power point tracking and modulate.
The solar cell maximum power point tracking device of the present embodiment also comprises:
The maximum power point voltage value of the second solar components string 2, second solar components string 2 is more than or equal to the maximum power point voltage value of the first solar components string 1.
One end of second solar components string 2 connects the positive pole of the second current sensor 20 and bus capacitor C successively, the negative pole of another termination bus capacitor C.
The two ends of bus capacitor C are connected in parallel to rear class DC-AC converter 3.
In an embodiment, when the maximum power point voltage value of the second solar components string 2 equals the maximum power point voltage value of the first solar components string 1, solar cell maximum power point tracking device of the present utility model also comprises: switch 4, and the two ends of switch 4 are connected with the first current sensor 10 and the second current sensor 20 respectively.
Solar components string 2 is connected on bus capacitor C by the utility model, and the voltage of solar components string 2 equals the both end voltage of bus capacitor C, i.e. busbar voltage Ubus.By rear class DC-AC conversion equipment 3 control bus voltage U bus, the namely output voltage of the second solar components string 2, follow the trail of the electric current of the second solar components string 2 and obtain realtime power, thus realizing the maximum power point tracking of the second solar components string 2.
What needs further illustrated is, the present embodiment device comprises at least one first solar components string 1, when the quantity of the first solar components string 1 is two or more, structure between multiple first solar components string 1 might not be identical, herein, maximum the second solar components string 2 of magnitude of voltage is directly connected on bus capacitor C, and remaining solar components string is all expressed as the first solar components string 1.
Multiple first solar components string 1 can be set in the present embodiment device, one end of each first solar components string 1 connects the positive pole of the first current sensor 10, first inductance L 1, first diode D1 and the positive pole of bus capacitor C successively, the other end connects the source S of the first switching tube Q1, and the drain D of the first switching tube Q1 is connected between the first inductance L 1 and the first diode D1.The grid G of the first switching tube Q1 is connected with the first controller U1, and the maximum power tracing circuit that these the first solar components strings 1 are formed still can work alone, and realizes the maximum power point tracking of different solar components strings 1.
It is worthy of note, in the present embodiment, the maximum power point voltage of the second solar components string 2 is greater than or equal to other at least one first solar components string 1, when the maximum power point voltage of the second solar components string 2 equals other at least one first solar components string 1, such as shown in Fig. 2, the present embodiment is to arrange a first solar components string 1, and the present embodiment device can also comprise: switch 4.During Closing Switch 4, as shown in Figure 3, the first solar components string 1 and the second solar components string 2 parallel operation can be made, and the first solar components string 1 is directly parallel on bus, thus can conversion efficiency be improved.Can see, by the present embodiment device, still the maximum power point tracking of independently multichannel solar components string can be obtained, the device such as inductance, switching tube, diode on ceiling voltage one tunnel in solar components string can be reduced simultaneously, save the device on Liao Gai road, reduce costs, reduce the wastage, improve whole efficiency, reduce plant bulk.What needs further illustrated is, the present embodiment device is applicable to the maximum power point tracking mode on N road (N is more than or equal to 2), namely the first solar components string 1 is not limited only to 1 tunnel in the present embodiment, can also be two-way or multichannel, its principle and annexation and foregoing circuit similar, no longer repeat at this.The present embodiment device can simplify the circuit of ceiling voltage in wherein comprised solar components string.
The solar cell maximum power point tracking device that the utility model provides, by the positive pole of a termination bus capacitor of the second maximum for magnitude of voltage solar components string, the negative pole of another termination bus capacitor, the two ends of bus capacitor are connected in parallel to rear class DC-AC converter, then not only can obtain independent trails and obtain the second solar components string and all the other the first solar components string maximum power points, the inductance on ceiling voltage one tunnel in solar components string can be reduced simultaneously, switching tube, the devices such as diode, save the device in follow-up mechanism, reduce costs and loss, improve whole efficiency, reduce plant bulk.
Above content is in conjunction with concrete execution mode further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made.
Claims (2)
1. a solar cell maximum power point tracking device, comprise at least one first solar components string, one end of each described first solar components string connects the first current sensor, the first inductance, the positive pole of the first diode and the positive pole of bus capacitor successively, the other end connects the source electrode of the first switching tube and the negative pole of bus capacitor, and the drain electrode of described first switching tube is connected between described first inductance and described first diode; The grid of described first switching tube is connected with the first controller; It is characterized in that, also comprise:
Second solar components string, the maximum power point voltage value of described second solar components string is more than or equal to the maximum power point voltage value of described first solar components;
One end of described second solar components string connects the positive pole of the second current sensor and described bus capacitor, the negative pole of bus capacitor described in another termination successively;
The two ends of described bus capacitor are connected in parallel to rear class DC-AC converter.
2. solar cell maximum power point tracking device as claimed in claim 1, it is characterized in that, when the maximum power point voltage value of described second solar components string equals the maximum power point voltage value of described first solar components string, also comprise: switch, the two ends of described switch are connected with described first current sensor and described second current sensor respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520606761.1U CN204836076U (en) | 2015-08-12 | 2015-08-12 | Solar cell's maximum power point tracer |
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| CN201520606761.1U CN204836076U (en) | 2015-08-12 | 2015-08-12 | Solar cell's maximum power point tracer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300623A (en) * | 2016-11-07 | 2017-01-04 | 珠海格力电器股份有限公司 | Light energy collecting circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300623A (en) * | 2016-11-07 | 2017-01-04 | 珠海格力电器股份有限公司 | Light energy collecting circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20210208 Address after: 518101 2 / F and 3 / F, building 4, xibianling Jiayu Company Industrial Zone, Shangwu village, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN GROWATT NEW ENERGY Co.,Ltd. Address before: 518000 East and third floors, 1st floor, building 5, xibianling Jiayu Company Industrial Zone, Shangwu village, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: GROWATT NEW ENERGY TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518101 floor a401, 4-13, building a, Sino German European Industrial Demonstration Park, Hangcheng Avenue, guxing community, Xixiang street, Bao'an District, Shenzhen, Guangdong Patentee after: Shenzhen Growatt New Energy Technology Co.,Ltd. Address before: 518101 2 / F and 3 / F, building 4, xibianling Jiayu Company Industrial Zone, Shangwu village, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN GROWATT NEW ENERGY Co.,Ltd. |