CN101697462A - Dynamic interconnected control system and control method for solar battery pack - Google Patents
Dynamic interconnected control system and control method for solar battery pack Download PDFInfo
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- CN101697462A CN101697462A CN200910075828A CN200910075828A CN101697462A CN 101697462 A CN101697462 A CN 101697462A CN 200910075828 A CN200910075828 A CN 200910075828A CN 200910075828 A CN200910075828 A CN 200910075828A CN 101697462 A CN101697462 A CN 101697462A
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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
Abstract
The invention provides a dynamic interconnected control system and a control method for a solar battery pack, which comprises a plurality of MOS switch units, a connection terminal array and a control unit, wherein MOS switches are connected in series to form an array; each electric node of the MOS switch array is connected with a corresponding node of the connection terminal; the MOS switches are electrically connected with a control unit; and the control unit controls switch-on/switch-off of the MOS switches according to the state of the solar battery unit connected with the connection terminal array. The method comprises the following steps of: connecting a plurality of MOS switch units in series; connecting each solar battery unit and an MOS switch in parallel and electrically connecting the solar battery unit and the control unit; using the control unit to monitor the state of each solar battery unit and controlling the switch-on/switch-off of the MOS switches according to the state of the solar battery unit. The dynamic interconnected control system and the control method for the solar battery pack provided by the invention solve the problem that the entire system is affected when a single solar battery unit fails by using a very simple circuit structure.
Description
Technical field
The present invention relates to dynamic interconnected control system of a kind of solar battery group and control method.
Background technology
The monomer generating voltage of solar cell is between the 0.8-1.6v.Therefore in order to realize the output of high voltage, big electric current, must adopt the complex topology structure of series multiple, parallel connection.But in series multiple, the parallel-connection structure, when cell damages or is in occlusion state, the pn knot that himself is equivalent to a very high internal resistance is connected in the circuit, makes the whole solar cell group be in mismatch Conditions, and significantly increasing of internal resistance causes exporting specified electric current.Though this moment, most battery units were in generating state,, thereby reduce generating efficiency because the existence of high internal resistance unit will make whole series arm output current reduce.
Existing solar battery group generally adopts simple series, parallel structure, when the series-connected cell unit on the cell panel damages or is blocked, the output current of monoblock series arm sharply reduces, and then influence the generating efficiency of monoblock cell panel, the solar power system environmental suitability that such cell panel is formed is low, very easily reduce generating efficiency, thereby influence applying of whole solar power system because of external condition influences.
Summary of the invention
At defective that exists in the prior art and deficiency, the objective of the invention is to propose dynamic interconnected control system of a kind of solar battery group and control method, can solve that single battery unit that solar battery group in the prior art simply adopts the series, parallel structure to cause damages or when being blocked whole solar cell group output current reduce and cause the low problem of generating efficiency.
In order to achieve the above object, the present invention proposes the dynamic interconnected control system of a kind of solar battery group, comprise two or more MOS switch elements, described MOS switch element is connected mutually, it is characterized in that, also comprises binding post array and control unit;
Each electrical nodes of described MOS switch arrays connects binding post array corresponding node, and is electrically connected control unit; Described control unit is according to the cut-off/close of the described MOS switch of the State Control of described solar battery cell.
Preferred as technique scheme, described control unit has test cell, and test cell is tested the polarity of each solar battery cell, and according to the cut-off/close of the described MOS switch of the Polarity Control of described solar battery cell.
Preferred as technique scheme, described control unit comprises:
The polarity comparator, described polarity comparator is electrically connected the binding post array, connects the polarity of solar battery cell to test described binding post array, and according to the polarity output signal;
Main controller, described main controller are electrically connected described polarity comparator, and according to the signal of described polarity comparator, and with the address date output of the solar battery cell that lost efficacy;
Drive latch, described driving latch is electrically connected described main controller, after described driving latch receives the address date of inefficacy, the address of losing efficacy is locked;
Drive decoder, described driving decoder is electrically connected described driving latch, and the address date of described inefficacy is deciphered and exported;
The isolated location array, described isolated location array is electrically connected described driving decoder, and connects each MOS switch; Described isolated location array is according to the address date control of losing efficacy, the MOS switch conduction that control is corresponding.
Preferred as technique scheme, described control unit also comprises:
Drive charge pump, described driving charge pump is electrically connected each MOS switch and thinks that described MOS switch provides electric power.
Simultaneously, the invention allows for a kind of solar battery group control method, comprising:
Step 1, two or more solar battery cells are connected mutually, and be each solar battery cell MOS switch in parallel, and be electrically connected control unit;
Preferred as technique scheme, described step 2 is specially:
Dynamic interconnected control system of solar battery group and control method that the present invention proposes adopt very simple circuit configuration just can solve in the prior art solar battery cell and lost efficacy and will have influence on the problem of whole system.
Description of drawings
Fig. 1 is the structural representation of first preferred embodiment of the invention;
Fig. 2 is the structural representation of second preferred embodiment of the invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
First preferred embodiment of the invention comprises binding post array 1 and MOS switch 2 and control unit 3 as shown in Figure 1.As shown in Figure 1, the external solar battery cell 1 of binding post array, solar battery cell 2...... solar battery cell N, series connection mutually between the solar battery cell, and each solar battery cell parallel connection is with the MOS switch, and described each MOS switch is electrically connected control unit, and described MOS switch initial condition is in disconnection.Wherein, control unit has test cell, and test cell is tested the polarity of each solar battery cell.Owing to when solar battery cell takes place to lose efficacy, polar switching can take place.Change if find the polarity of solar battery cell, then test cell can detect this solar battery cell and lost efficacy, then the MOS switch of closed this solar battery cell correspondence.The significantly increase of back internal resistance because solar battery cell lost efficacy, and behind the MOS switch closure, electric current can reach next solar battery cell through the MOS switch.
Like this, adopt simple circuit configuration just can solve that a solar battery cell damages the problem that will have influence on whole system in the prior art very much.
Wherein, as a concrete example, second preferred embodiment of the invention comprises that binding post array 1, MOS switch arrays 2, N select 2 multiway analog switches 11, polarity comparator 4, Single Chip Microcomputer (SCM) system 5, driving latch 6, drive decoder 7, sampling decoder 8, drive charge pump 9, isolated location array 10 as shown in Figure 2.
This binding post array 1 external solar battery group that constitutes by the series-connected solar cells unit, its each be electrically connected node and be input to N and select in 2 multiway analog switches 11, mode by scanning is input in proper order in the polarity comparator 4 and compares, and judges the operating state of each battery unit.
The initial data that N selects the scan address signal of 2 multiway analog switches 11 to be produced by Single Chip Microcomputer (SCM) system 5 is by providing the realization sequential scanning after 8 decodings of sampling decoder; 4 pairs of current battery both end voltage of polarity comparator compare the operating state of judging battery.Polarity inversion behind battery failure, polarity comparator 4 output Failure Control level after Single Chip Microcomputer (SCM) system 5 receives the inefficacy level, to driving on the latch 6, latch the current address data delivery to the fail address.
Address date after latching is transported to and drives in the decoder 7, address date is deciphered, control the corresponding unit conducting in the isolated location array 10 then, corresponding MOS switch conduction in the driven MOS switch 2, the line terminals that achieves a butt joint array 1 in the external solar battery group short circuit of corresponding dead battery unit handle, reduce the loop internal resistance, derive the electric weight of other effective unit effectively.
Drive charge pump 9 and be used to provide the required direct voltage of driven MOS switch arrays 2, be operated in low impedance state, reduce the loop internal resistance to greatest extent to guarantee the MOS switch in the MOS switch arrays.
Third preferred embodiment of the invention has proposed a kind of solar battery group control method, comprising:
Step 1, two or more solar battery cells are connected mutually, and be each solar battery cell MOS switch in parallel, and be electrically connected control unit;
Wherein, described step 2 is specially:
Certainly; the present invention also can have other embodiment; under the situation that does not deviate from spirit of the present invention and essence thereof; the person of ordinary skill in the field works as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of claim of the present invention.
Claims (6)
1. the dynamic interconnected control system of solar battery group comprises two or more MOS switch elements, and described MOS switch element is connected mutually, it is characterized in that, also comprises binding post array and control unit;
Each electrical nodes of described MOS switch arrays connects binding post array corresponding node, and is electrically connected control unit; Described control unit is according to the cut-off/close of the described MOS switch of State Control of binding post solar battery cell that array connects.
2. the dynamic interconnected control system of solar battery group according to claim 1, it is characterized in that, described control unit has test cell, and test cell is tested the polarity of each solar battery cell, and according to the cut-off/close of the described MOS switch of the Polarity Control of described solar battery group.
3. the dynamic interconnected control system of solar battery group according to claim 1 is characterized in that described control unit comprises:
The polarity comparator, described polarity comparator is electrically connected the binding post array, testing the polarity of the solar battery cell that described binding post array connects, and according to the polarity output signal;
Main controller, described main controller are electrically connected described polarity comparator, and according to the signal of described polarity comparator, and with the address date output of the solar battery cell that lost efficacy;
Drive latch, described driving latch is electrically connected described main controller, after described driving latch receives the address date of inefficacy, the address of losing efficacy is locked;
Drive decoder, described driving decoder is electrically connected described driving latch, and the address date of described inefficacy is deciphered and exported;
The isolated location array, described isolated location array is electrically connected described driving decoder, and connects each MOS switch; Described isolated location array is according to the address date control of losing efficacy, the MOS switch conduction that control is corresponding.
4. the dynamic interconnected control system of solar battery group according to claim 3 is characterized in that described control unit also comprises:
Drive charge pump, described driving charge pump is electrically connected each MOS switch and thinks that described MOS switch provides electric power.
5. solar battery group control method comprises:
Step 1, two or more solar battery cells are connected mutually, and be each solar battery cell electronic switch in parallel, and be electrically connected control unit;
Step 2, make the state of described each solar battery cell of control unit monitoring, and according to the cut-off/close of the described electronic switch of State Control of described solar battery cell.
6. solar battery group control method according to claim 5 is characterized in that, described step 2 is specially:
Step 2`, a test cell is set, test cell is tested the polarity of each solar battery cell, and according to the cut-off/close of the described electronic switch of Polarity Control of described solar battery group.
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| CN200910075828A CN101697462A (en) | 2009-10-30 | 2009-10-30 | Dynamic interconnected control system and control method for solar battery pack |
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| CN200910075828A CN101697462A (en) | 2009-10-30 | 2009-10-30 | Dynamic interconnected control system and control method for solar battery pack |
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