CN204392083U - A kind of intelligent solar photovoltaic module circuit - Google Patents
A kind of intelligent solar photovoltaic module circuit Download PDFInfo
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- CN204392083U CN204392083U CN201520131591.6U CN201520131591U CN204392083U CN 204392083 U CN204392083 U CN 204392083U CN 201520131591 U CN201520131591 U CN 201520131591U CN 204392083 U CN204392083 U CN 204392083U
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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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model relates to a kind of intelligent solar photovoltaic module circuit, circuit comprises the photovoltaic group string of many group series connection, often organize described photovoltaic group string and comprise intelligent photovoltaic component unit, MPPT functional module, switching tube, CPU memory modules, the control module that intelligent photovoltaic component unit can be made to be in short circuit or this photovoltaic group string and other photovoltaic group strings are disconnected, described switching tube is controlled by described control module.The utility model has the advantages that: 1, MPPT structure can be simplified, reduce the application of power electric component, raise the efficiency, reduce costs; Even if 2 are in off-state due to monolithic solar photovoltaic assembly failure cause, also can not have influence on the output of whole group of string, increase substantially the utilance of photoelectricity.
Description
Technical field
The utility model relates to a kind of photovoltaic apparatus field, particularly a kind of intelligent solar photovoltaic module circuit.
Background technology
Generally, in photovoltaic plant, be solve mismatch problems, in the DC side of combining inverter all with MPPT translation circuit, comprise traditional centralized grid-connected photovoltaic inverter and group string data grid-connected photovoltaic inverter.
In recent years, for solving unmatched problem between single solar photovoltaic assembly, newly occurred interchange assembly and intelligent assembly, they and traditional solar photovoltaic assembly compare, and primary structure is as Fig. 1.
Wherein, exchange assembly due to its circuit structure more complicated, the electronic devices and components of use are more, and cost is higher.General use intelligent assembly can reach the objects such as mismatch optimization, communication.
General intelligence modular construction is as Fig. 2: wherein, the duty ratio of by-pass cock S, can reach regulation output voltage, thus reaches MPPT maximum power point tracking object; CPU & internal memory is communicated with the external world by RF mode, when intelligent assembly breaks down, when needing to break from whole group of string, by Long-distance Control, makes T1, T2 be in off-state, thus is isolated by intelligent assembly.In this scheme, when single solar photovoltaic assembly disconnects time, whole group of string can be made to break, have influence on the output of whole group of string, as Fig. 3: suppose due to failure cause, solar photovoltaic assembly in the middle of Fig. 3 is needed to isolate group string, by the action of control T3, T4 switch, middle solar photovoltaic assembly is exported and is in off-state, by the method, middle solar photovoltaic assembly is isolated group string, disconnecting as schemed switch in red circle, then no current in whole loop, causing inactivity in whole string solar photovoltaic assembly to export.
Utility model content
The purpose of this utility model is to provide a kind of in the photovoltaic plant of intelligent assembly, when carrying out output to monolithic solar photovoltaic assembly and turning off, do not affect other solar photovoltaic assemblies in group string, there is the intelligent solar photovoltaic module circuit of original power optimization and communication function simultaneously.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of intelligent solar photovoltaic module circuit, it comprises the photovoltaic group string of many group series connection, often organize described photovoltaic group string and comprise intelligent photovoltaic component unit, with the MPPT functional module of connecting of intelligent photovoltaic component unit, it also comprises the CPU memory modules for intelligent photovoltaic component location mode described in receiving and analyzing, be electrically connected with described CPU memory modules and control module for controlling described MPPT function, each described photovoltaic group string is also connected with the switching tube that intelligent photovoltaic component unit can be made to be in short circuit or this photovoltaic group string and other photovoltaic group strings are disconnected, described switching tube is controlled by described control module.
Optimize, each described photovoltaic group string has a described switching tube, described switching tube anode is connected to the anode of described intelligent photovoltaic component unit, its negative electrode is connected to the negative electrode of described photovoltaic module, it controls pole and is connected with the output of described control module, switching tube described in arbitrary photovoltaic group string is connected, and the photovoltaic module unit in this photovoltaic group string is in short-circuit condition.
Optimize, each described MPPT functional module comprises the by-pass cock for regulating duty ratio that negative pole is connected with the positive pole of described photovoltaic module unit, the first diode that positive pole is connected with the negative pole of described photovoltaic module unit and the second diode, induction coil between the negative pole being connected to the first diode and the second diode, between the negative pole that one end is connected to induction coil and the second diode, the other end is connected to the electric capacity of described photovoltaic module unit negative pole, the negative pole of described first diode is connected to the positive pole of by-pass cock, described switching tube comprises the first switching tube and second switch pipe, the positive pole of described first switching tube is connected on the link of described induction coil and described electric capacity, its negative pole is connected on the negative pole of described second diode, the negative pole of described second switch pipe is connected to the negative pole of described photovoltaic module unit, its positive pole is connected on the positive pole of described second diode, still the first switching tube described in a photovoltaic group string and the second diode disconnect, photovoltaic module unit in this photovoltaic group string is in off-state.
The beneficial effects of the utility model are: 1, can simplify MPPT structure, reduce the application of power electric component, raise the efficiency, reduce costs; Even if 2 are in off-state due to monolithic solar photovoltaic assembly failure cause, also can not have influence on the output of whole group of string, increase substantially the utilance of photoelectricity.
Accompanying drawing explanation
Accompanying drawing 1 is the structure diagram of existing tradition, interchange, intelligent photovoltaic component;
Accompanying drawing 2 is the structural representation of existing photovoltaic module unit;
Accompanying drawing 3 is the structural representation of existing photovoltaic group string;
Accompanying drawing 4 is non-linear and the IV performance plot of linear electrical element;
Accompanying drawing 5 is the structural representation of photovoltaic module unit in the utility model embodiment 1;
Accompanying drawing 6 is the structural representation of photovoltaic group string in the utility model embodiment 1;
Accompanying drawing 7 is the structural representation of photovoltaic module unit in the utility model embodiment 2;
Accompanying drawing 8 is the structural representation of photovoltaic group string in the utility model embodiment 2;
Embodiment
Below in conjunction with embodiment shown in the drawings, the utility model is described in detail below:
Embodiment one
As shown in Figure 4, because solar photovoltaic assembly is non-linear element, its IV characteristic unlike the IV characteristic of power supply.The IV curve of solar photovoltaic assembly can be similar to regard as and form with perpendicular to transverse axis (voltage axis) part by perpendicular to the longitudinal axis (current axis) part, when the working point of load is on the former, solar photovoltaic assembly can be similar to and regards current source as; When the working point of load is on the latter, voltage source can be regarded as by approximate for solar photovoltaic assembly, so, can say that the characteristic of the existing current source of solar photovoltaic assembly has again the characteristic of voltage source.Namely solar photovoltaic assembly can the such short circuiting work in image current source.Utilize this characteristic, design intelligent solar photovoltaic module circuit, by Fig. 2 Central Plains T1, T2 two switches are cancelled, export between both positive and negative polarity at photovoltaic module unit and add switch transistor T, as shown in Figure 5, the intelligent solar photovoltaic module circuit formed comprises the photovoltaic group string of many group series connection, often organize described photovoltaic group string and comprise intelligent photovoltaic component unit, with the MPPT(MPPT maximum power point tracking of connecting of intelligent photovoltaic component unit) functional module, intelligent solar photovoltaic module circuit also comprises the CPU memory modules for intelligent photovoltaic component location mode described in receiving and analyzing, be electrically connected with described CPU memory modules and control module for controlling described MPPT function, each described photovoltaic group string is also connected with the switching tube that photovoltaic module unit can be made to be in short circuit or this photovoltaic group string and other photovoltaic group strings are disconnected, described switching tube is controlled by described control module.Each described photovoltaic group string has a described switching tube, and described switching tube anode is connected to the anode of described photovoltaic module unit, and its negative electrode is connected to the negative electrode of described photovoltaic module unit, and it controls pole and is connected with the output of described control module.
When certain photovoltaic module unit is out of order or needs to safeguard, by control switch pipe T, control whether be in short-circuit condition between this photovoltaic module unit both positive and negative polarity, only need turn on-switch pipe T, short-circuit condition is in, then this photovoltaic module unit no-output to external world between photovoltaic module unit both positive and negative polarity.As Fig. 6: suppose due to failure cause, intermediate light photovoltaic assembly cell isolation is needed to go out photovoltaic group string, only need by control switch T2, its photovoltaic module unit is made to be in short-circuit condition, then the photovoltaic module unit of centre can be isolated from whole string, do not affect again the operating state of whole group of string simultaneously, thus improve energy utilization rate.
Embodiment two
As shown in Figure 7, intelligent solar photovoltaic module circuit comprises the photovoltaic group string of many group series connection in the present embodiment, often organize described photovoltaic group string and comprise intelligent photovoltaic component unit, with the MPPT functional module of connecting of intelligent photovoltaic component unit, intelligent solar photovoltaic module circuit also comprises the CPU memory modules for intelligent photovoltaic component location mode described in receiving and analyzing, be electrically connected with described CPU memory modules and control module for controlling described MPPT function, each described photovoltaic group string is also connected with the switching tube that intelligent photovoltaic component unit can be made to be in short circuit or this photovoltaic group string and other photovoltaic group strings are disconnected, described switching tube is controlled by described control module.Each described MPPT functional module comprises the by-pass cock for regulating duty ratio that negative pole is connected with the positive pole of described photovoltaic module unit, the first diode that positive pole is connected with the negative pole of described photovoltaic module unit and the second diode, induction coil between the negative pole being connected to the first diode and the second diode, between the negative pole that one end is connected to induction coil and the second diode, the other end is connected to the electric capacity of described photovoltaic module unit negative pole, the negative pole of described first diode is connected to the positive pole of by-pass cock, described switching tube comprises the first switching tube and second switch pipe, the positive pole of described first switching tube is connected on the link of described induction coil and described electric capacity, its negative pole is connected on the negative pole of described second diode, the negative pole of described second switch pipe is connected to the negative pole of described photovoltaic module unit, its positive pole is connected on the positive pole of described second diode.
Can be disconnected by first, second switching tube of control, make single photovoltaic module cell isolation go out whole group of string, do not affect again the operating state of whole group of string simultaneously.Following Fig. 8: if need the photovoltaic module cell isolation of centre, only need disconnect T3, T4 and middle solar photovoltaic assembly can be eliminated whole group of string, not affect the output of this group string simultaneously.
Based on the control/guard method of the intelligent solar photovoltaic module circuit in above-mentioned two embodiments, whether it comprises the following steps: first detect described intelligent photovoltaic component unit by described CPU memory modules and to break down or the need of maintenance, when breaking down or need to safeguard, output signal to described control module by described CPU memory modules; Output signal to described switching tube by described control module again thus make intelligent photovoltaic component unit be in short circuit or this photovoltaic group string and other photovoltaic group strings are disconnected.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences done according to the utility model spirit change or modify, and all should be encompassed within protection range of the present utility model.
Claims (3)
1. an intelligent solar photovoltaic module circuit, it comprises the photovoltaic group string of many group series connection, often organize described photovoltaic group string and comprise intelligent photovoltaic component unit, with the MPPT functional module of connecting of intelligent photovoltaic component unit, it also comprises the CPU memory modules for intelligent photovoltaic component location mode described in receiving and analyzing, be electrically connected with described CPU memory modules and control module for controlling described MPPT function, it is characterized in that: each described photovoltaic group string is also connected with the switching tube that intelligent photovoltaic component unit can be made to be in short circuit or this photovoltaic group string and other photovoltaic group strings are disconnected, described switching tube is controlled by described control module.
2. intelligent solar photovoltaic module circuit according to claim 1, it is characterized in that: each described photovoltaic group string has a described switching tube, described switching tube anode is connected to the anode of described intelligent photovoltaic component unit, its negative electrode is connected to the negative electrode of described photovoltaic module, it controls pole and is connected with the output of described control module, switching tube described in arbitrary photovoltaic group string is connected, and the photovoltaic module unit in this photovoltaic group string is in short-circuit condition.
3. intelligent solar photovoltaic module circuit according to claim 1, it is characterized in that: each described MPPT functional module comprises the by-pass cock for regulating duty ratio that negative pole is connected with the positive pole of described photovoltaic module unit, the first diode that positive pole is connected with the negative pole of described photovoltaic module unit and the second diode, induction coil between the negative pole being connected to the first diode and the second diode, between the negative pole that one end is connected to induction coil and the second diode, the other end is connected to the electric capacity of described photovoltaic module unit negative pole, the negative pole of described first diode is connected to the positive pole of by-pass cock, described switching tube comprises the first switching tube and second switch pipe, the positive pole of described first switching tube is connected on the link of described induction coil and described electric capacity, its negative pole is connected on the negative pole of described second diode, the negative pole of described second switch pipe is connected to the negative pole of described photovoltaic module unit, its positive pole is connected on the positive pole of described second diode, still the first switching tube described in a photovoltaic group string and the second diode disconnect, photovoltaic module unit in this photovoltaic group string is in off-state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520131591.6U CN204392083U (en) | 2015-03-09 | 2015-03-09 | A kind of intelligent solar photovoltaic module circuit |
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| CN201520131591.6U CN204392083U (en) | 2015-03-09 | 2015-03-09 | A kind of intelligent solar photovoltaic module circuit |
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| CN204392083U true CN204392083U (en) | 2015-06-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104660038A (en) * | 2015-03-09 | 2015-05-27 | 中利腾晖光伏科技有限公司 | Intelligent solar photovoltaic module circuit and control/protection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104660038A (en) * | 2015-03-09 | 2015-05-27 | 中利腾晖光伏科技有限公司 | Intelligent solar photovoltaic module circuit and control/protection method thereof |
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Address after: 215542 Jiangsu city of Suzhou province Changshou City Shajiabang Changkun Industrial Park Teng Hui Road No. 1 Patentee after: Suzhou Tenghui Photovoltaic Technology Co., Ltd. Address before: 215542 Jiangsu city of Suzhou province Changshu Shajiabang Changkun Industrial Park Teng Hui Road No. 1 Patentee before: Zhongli Talesun Solar Technology Co., Ltd. |