CN110138331B - Electric-heat conversion control method for realizing Domino type automatic snow melting by photovoltaic module - Google Patents
Electric-heat conversion control method for realizing Domino type automatic snow melting by photovoltaic module Download PDFInfo
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- CN110138331B CN110138331B CN201910499374.5A CN201910499374A CN110138331B CN 110138331 B CN110138331 B CN 110138331B CN 201910499374 A CN201910499374 A CN 201910499374A CN 110138331 B CN110138331 B CN 110138331B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000002844 melting Methods 0.000 title claims abstract description 26
- 230000008018 melting Effects 0.000 title claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 14
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000155 melt Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/10—Cleaning arrangements
- H02S40/12—Means for removing snow
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/0019—Circuit arrangements
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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 provides an electric-heat conversion control method for realizing Domino type automatic snow melting by a photovoltaic module, which comprises the following steps: when the first detection value reaches a first threshold value, the first photovoltaic module supplies power to the second photovoltaic module in a reverse direction; when the second detection value reaches a second threshold value, reversely supplying power to a third photovoltaic module through the first photovoltaic module and the second photovoltaic module; when the third detection value reaches a third threshold value, reversely supplying power to a fourth photovoltaic module through the first photovoltaic module, the second photovoltaic module and the third photovoltaic module; and so on; and when the M-1 detection value reaches the M-1 threshold value, the M photovoltaic module is reversely powered through the first photovoltaic module to the M-1 photovoltaic module. According to the invention, accumulated snow on the photovoltaic module is melted by reverse power supply, so that automation and self-energy supply of the photovoltaic module during snow accumulation cleaning are realized, the electric heat conversion efficiency is gradually improved along with the increase of the photovoltaic module for power generation, the Domino effect is realized, and the snow melting time is favorably reduced.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to an electric-heat conversion control method for realizing Domino type automatic snow melting by a photovoltaic module.
Background
Roof-top photovoltaic power generation systems arranged in regions with higher latitudes (such as northeast, canada, and northern europe of china) often suffer from the problem that the systems do not generate power due to accumulated snow for a long time in the year, and the traditional snow removal method is to remove accumulated snow on the surfaces of the photovoltaic panels by manually sweeping snow, spraying hot water, sprinkling salt or spraying a snow melting agent. The adoption of a manual mode not only wastes time and labor and has high cost, but also easily damages the photovoltaic panel. The second snow removing mode is to reversely supply power to the photovoltaic panel under the condition that the photovoltaic panel is covered with snow, and use an electrode connecting grid bar on the photovoltaic panel as an electric heating wire to heat the photovoltaic panel. In the past, the method needs an external power supply for supplying power, the power needed during starting is large, not only is the power consumed, but also manual intervention is needed during starting. So that the method has not been widely used so far. The roof of having installed the photovoltaic board in addition, if can not in time snow melting, cause the relapse accumulation of roof snow more easily, increased the requirement to the roof bearing, be unfavorable for the popularization of photovoltaic roof.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides an electric-heat conversion control method for realizing Domino type automatic snow melting by a photovoltaic module.
The invention provides an electric-heat conversion control method for realizing Domino type automatic snow melting by a photovoltaic module, which is characterized by comprising the following steps of:
when the first detection value reaches a first threshold value, the first photovoltaic module supplies power to the second photovoltaic module in a reverse direction;
when the second detection value reaches a second threshold value, reversely supplying power to a third photovoltaic module through the first photovoltaic module and the second photovoltaic module;
when the third detection value reaches a third threshold value, reversely supplying power to a fourth photovoltaic module through the first photovoltaic module, the second photovoltaic module and the third photovoltaic module;
and so on;
when the M-1 detection value reaches the M-1 threshold value, the M photovoltaic module is reversely powered through the first photovoltaic module to the M-1 photovoltaic module;
when the Mth detection value reaches the Mth threshold value, the power is supplied to an external load through the first photovoltaic module to the Mth photovoltaic module, and M is larger than or equal to 5.
Preferably, the specific way of reversely supplying power to the nth photovoltaic module through the first to the N-1 th photovoltaic modules is as follows: the method comprises the steps of connecting a first photovoltaic module to an Nth photovoltaic module in series to form a closed loop, wherein the Nth photovoltaic module is in homopolar connection with an N-1 th photovoltaic module, the Nth photovoltaic module is in homopolar connection with the first photovoltaic module, the Kth photovoltaic module is in heteropolar connection with a K +1 th photovoltaic module, N is more than 2 and less than or equal to M, and K is more than or equal to 1 and less than or equal to N-2.
Preferably, the second detection value is a current detection value for reversely supplying power to the second photovoltaic module by the first photovoltaic module, the J-th detection value is a current detection value for reversely supplying power to the J-th photovoltaic module by the first photovoltaic module to the J-1 th photovoltaic module, and J is more than or equal to 3 and less than or equal to M.
Preferably, the S-th detection value is a pressure detection value on the S-th photovoltaic module, and S is more than or equal to 2 and less than or equal to M.
Preferably, the first detection value is an electrical parameter when the first photovoltaic module to the Mth photovoltaic module supply power to an external load.
Preferably, the output power of the photovoltaic module I is greater than that of the photovoltaic module I-1, and I is greater than or equal to 3 and less than or equal to M.
Preferably, the number of photovoltaic panels included in the ith photovoltaic module is greater than the number of photovoltaic panels included in the ith-1 photovoltaic module.
Preferably, the photovoltaic panel included in the second photovoltaic module, the photovoltaic panel included in the third photovoltaic module to the photovoltaic panel included in the mth photovoltaic module are all installed on the same inclined plane P; the photovoltaic panels on the inclined plane P are arranged in a matrix, the photovoltaic panels belonging to the Lth photovoltaic module are positioned below the photovoltaic panels belonging to the G th photovoltaic module in a row of photovoltaic panels along the inclined direction of the inclined plane P, and L is more than or equal to 2 and less than or equal to G and less than or equal to M.
Preferably, the photovoltaic panels comprised in the first photovoltaic module are mounted on an inclined plane P.
Preferably, the photovoltaic panel comprised in the first photovoltaic module is mounted vertically.
According to the electric-heat conversion control method for realizing Domino type automatic snow melting by the photovoltaic module, the accumulated snow on the photovoltaic module is cleaned through the characteristic of reverse power supply and heating of the photovoltaic module, and automation and self-energy supply of the photovoltaic module during snow melting cleaning are realized. The photovoltaic power generation system can effectively solve the problem of reduction of photovoltaic power generation amount caused by snow cover on the photovoltaic panel on the premise of not using external power supply.
According to the photovoltaic module and the power supply method, with the increase of the photovoltaic module for reverse power supply, the power obtained by the photovoltaic module for reverse power supply is larger and larger, so that the working power of the photovoltaic module for reverse power supply is increased in the process of reverse power supply.
The electric-heat conversion control method for realizing Domino type automatic snow melting by the photovoltaic module is used for gradually improving the electric-heat conversion efficiency along with the increase of the photovoltaic module for power generation when the photovoltaic module reversely supplies power to melt snow, so that the Domino effect is realized, the snow melting efficiency is favorably improved, and the snow melting time is shortened.
Drawings
FIG. 1 is a flow chart of an electrothermal conversion control method for realizing Domino type automatic snow melting by a photovoltaic module according to the present invention;
FIG. 2 is a schematic diagram of a photovoltaic panel grouping for implementing the method of FIG. 1;
FIG. 3 is a schematic circuit diagram of a method of FIG. 1 according to embodiment 2;
FIG. 4 is an equivalent circuit diagram of the embodiment shown in FIG. 3;
FIG. 5 is a schematic circuit diagram of a method according to embodiment 3 for implementing the method shown in FIG. 1;
fig. 6 is an equivalent circuit diagram of the embodiment shown in fig. 5.
Detailed Description
The photovoltaic module provided by the invention comprises one or more photovoltaic panels; when the photovoltaic module contains a plurality of photovoltaic panels, the photovoltaic module is a photovoltaic power supply formed by overlapping power of the photovoltaic panels. Specifically, when the photovoltaic module comprises a plurality of photovoltaic panels, the plurality of photovoltaic panels are connected in series and/or in parallel.
The homopolar connection mentioned in the invention means that when two photovoltaic modules are connected, the anode of one photovoltaic module is connected with the anode of the other photovoltaic module, or the cathode of one photovoltaic module is connected with the cathode of the other photovoltaic module.
The heteropolar connection mentioned in the invention means that when two photovoltaic modules are connected, the anode of one photovoltaic module is connected with the cathode of the other photovoltaic module.
In the invention, the first polarity terminal and the second polarity terminal are positive and negative electrodes of the electrical element, and specifically, when the first polarity terminal is a positive electrode, the second polarity terminal is a negative electrode; alternatively, when the first polarity terminal is a negative electrode, the second polarity terminal is a positive electrode.
Referring to fig. 1, the method for controlling the electric-heat conversion of the photovoltaic module to realize Domino type automatic snow melting provided by the invention comprises the following steps:
when the first detection value reaches a first threshold value, the first photovoltaic module supplies power to the second photovoltaic module in a reverse direction;
when the second detection value reaches a second threshold value, reversely supplying power to a third photovoltaic module through the first photovoltaic module and the second photovoltaic module;
when the third detection value reaches a third threshold value, reversely supplying power to a fourth photovoltaic module through the first photovoltaic module, the second photovoltaic module and the third photovoltaic module;
and so on;
when the M-1 detection value reaches the M-1 threshold value, the M photovoltaic module is reversely powered through the first photovoltaic module to the M-1 photovoltaic module;
and when the Mth detection value reaches the Mth threshold value, supplying power to an external load through the first photovoltaic module to the Mth photovoltaic module.
In the embodiment, when the first photovoltaic module to the (N-1) th photovoltaic module reversely supply power to the Nth photovoltaic module, N is more than 2 and less than or equal to M, and the Nth photovoltaic module generates heat under the large-voltage reverse power supply by accumulating the output power of the first photovoltaic module to the (N-1) th photovoltaic module. So, when the photovoltaic board among the Nth photovoltaic module coats and is stamped the snow, the snow that generates heat of accessible Nth photovoltaic module melts, the snow clearance of being convenient for.
In the embodiment, snow on the photovoltaic module is cleaned through the characteristic that the photovoltaic module reversely supplies power and generates heat, and automation and self-energy supply of the photovoltaic module during snow cleaning are realized. And with the clearance of snow, N value constantly increases, and the photovoltaic module who is supplied power in the opposite direction obtains supply power more and more promptly, is favorable to improving the efficiency of generating heat to improve snow melting efficiency. In specific implementation, M is more than or equal to 5.
Specifically, in this embodiment, the specific way of reversely supplying power to the nth photovoltaic module through the first to the N-1 th photovoltaic modules is as follows: connecting the first photovoltaic module to the Nth photovoltaic module in series to form a closed loop, wherein the Nth photovoltaic module is in homopolar connection with the (N-1) th photovoltaic module, the Nth photovoltaic module is in homopolar connection with the first photovoltaic module, the Kth photovoltaic module is in heteropolar connection with the (K + 1) th photovoltaic module, and 2<N is less than or equal to M, and K is less than or equal to 1 and less than or equal to N-2. Thus, firstA photovoltaic component to an N-1 photovoltaic component are connected in series to form a power supply, and the N-1 photovoltaic component is used as a power consumption load, so that the working voltage obtained by the N-1 photovoltaic component
The sum of the supply voltage of the first photovoltaic module and the supply voltage of the (N-1) th photovoltaic module, i.e.
，
Is as follows
The supply voltage of the photovoltaic module.
In this embodiment, under the same illumination condition, the output power of the ith photovoltaic module is greater than the output power of the (I-1) th photovoltaic module, and I is greater than or equal to 3 and less than or equal to M, and specifically, the number of the photovoltaic panels included in the ith photovoltaic module is greater than the number of the photovoltaic panels included in the (I-1) th photovoltaic module. Therefore, as the power supply power obtained by the photovoltaic module which is reversely powered is larger and larger, the photovoltaic modules which are reversely powered contain more and more photovoltaic panels, and the direct proportional relation between the number of the photovoltaic panels which generate heat in the same batch and the sum of the power supply power is realized, so that the snow melting efficiency of the photovoltaic panels is improved by improving the number of the photovoltaic panels which generate heat in the same batch on the premise of ensuring the heating efficiency of a single photovoltaic panel.
Specifically, in this embodiment, the photovoltaic panel included in the second photovoltaic module, the photovoltaic panel included in the third photovoltaic module to the photovoltaic panel included in the mth photovoltaic module are all installed on the same inclined plane P; the photovoltaic panels on the inclined plane P are arranged in a matrix, the photovoltaic panels belonging to the Lth photovoltaic module are positioned below the photovoltaic panels belonging to the G th photovoltaic module in a row of photovoltaic panels along the inclined direction of the inclined plane P, and L is more than or equal to 2 and less than or equal to G and less than or equal to M.
Thus, in the embodiment, the control method is applied to the photovoltaic panel on the inclined plane P, and when the photovoltaic module self-heats the snow, the snow on the photovoltaic panel starts to melt from the plane close to the photovoltaic panel, so that the snow can conveniently slide along the inclined plane P, and the snow cleaning efficiency is improved. Moreover, in the embodiment, the heating sequence of the photovoltaic panels in the same row from bottom to top is realized on the inclined plane P, so that the sequence of clearing the accumulated snow from bottom to top is realized, the accumulated snow below is prevented from sliding off the accumulated snow above, and the accumulated snow melting and accumulated snow sliding are further matched to improve the accumulated snow clearing efficiency.
Specifically, in the present embodiment, the photovoltaic panels on the inclined plane P can be combined into a seamless plane, so as to further reduce the resistance of snow to slide.
In the present embodiment, the photovoltaic panel included in the first photovoltaic module is mounted on the inclined plane P. So, when snow melts, the snow on the first photovoltaic module can be eliminated through other modes such as manual clearance, then the second photovoltaic module is supplied power through first photovoltaic module, and the third photovoltaic module is supplied power to rethread first photovoltaic module and second photovoltaic module.
During specific implementation, the photovoltaic panel vertical installation included in the first photovoltaic assembly can be set, so that the first photovoltaic assembly is prevented from being covered by accumulated snow, and the first photovoltaic assembly is guaranteed to be in a photoelectric conversion state in real time.
Specifically, in this embodiment, the second detection value is a current detection value for the first photovoltaic module to reversely supply power to the second photovoltaic module, the jth detection value is a current detection value for the first to J-1 th photovoltaic modules to reversely supply power to the jth photovoltaic module, and J is greater than or equal to 2 and less than or equal to M. Specifically, when the J-th photovoltaic module is reversely powered by the first photovoltaic module to the J-1 th photovoltaic module, the light receiving area of the J-th photovoltaic module is increased along with melting of snow on the J-th photovoltaic module, so that the current in a power supply loop formed by the first photovoltaic module to the J-th photovoltaic module gradually increases. Therefore, in the embodiment, whether the accumulated snow on the second photovoltaic module melts can be judged by whether the second detection value reaches the second threshold value, and whether the accumulated snow on the jth photovoltaic module melts can be judged by whether the jth detection value reaches the jth threshold value. Specifically, the second threshold is a current value of reverse power supply of the second photovoltaic module by the first photovoltaic module after snow on the second photovoltaic module melts, and the jth threshold is a current value of reverse power supply of the jth photovoltaic module by the first photovoltaic module to the jth-1 photovoltaic module after snow on the jth photovoltaic module melts.
In specific implementation, the S detection value can also be set as a pressure detection value on the S photovoltaic module, and S is more than or equal to 2 and less than or equal to M. Along with the snow on the photovoltaic module melts, its pressure measurement value that corresponds is littleer and smaller, and the pressure value that detects when setting up no snow on the S photovoltaic module is as the S threshold value, through the comparison of S detection value and S threshold value, alright judge whether snow on the S photovoltaic module melts.
In this embodiment, the first detection value is an electrical parameter when the first to mth photovoltaic modules supply power to the external load, and specifically, a current value, a voltage value, or a resistance value may be used.
Specifically, in the present embodiment, the first threshold, the second threshold, and the mth threshold may be set in advance, or corresponding models may be set for real-time calculation. For example, the first threshold, the second threshold to the mth threshold may be calculated according to the current temperature, the light intensity, and the like, in combination with the operating characteristics of the photovoltaic panel.
The power generation mode of the photovoltaic module in the above method is further described below with reference to several specific examples.
Example 1
The embodiment provides a photovoltaic power generation control system through self-generating realization Domino formula snow, includes: the photovoltaic module comprises M photovoltaic modules, a circuit module and a controller, wherein the circuit module is respectively connected with each photovoltaic module and the controller.
The circuit module comprises M working states, and in the first working state, the first photovoltaic module supplies power to the second photovoltaic module reversely through the circuit module;
under a second working state, the first photovoltaic module and the second photovoltaic module reversely supply power to the third photovoltaic module through the circuit module;
in a third working state, the first photovoltaic module, the second photovoltaic module and the third photovoltaic module reversely supply power to the fourth photovoltaic module through the circuit module;
by the way of analogy, the method can be used,
under the M-2 working state, the first photovoltaic module to the M-2 photovoltaic module reversely supply power to the M-1 photovoltaic module through the circuit module;
under the M-1 working state, the first photovoltaic module to the M-1 photovoltaic module reversely supply power to the M photovoltaic module through the circuit module;
under the Mth working state, the first photovoltaic module to the Mth photovoltaic module supply power to an external load through the circuit module.
In this embodiment, the first photovoltaic module is in a power supply state in any working state of the circuit module, so that in this embodiment, when any one photovoltaic module is reversely powered, the direction charging progress of the photovoltaic module can be judged by detecting an electrical parameter, such as a current value, a voltage value or a resistance value, of a loop in which the first photovoltaic module is located, so that the controller switches the working state according to the obtained electrical parameter working circuit module.
Specifically, when the system is applied to snow melting on a photovoltaic panel, the snow melting condition can be detected by respectively arranging the pressure sensors on the second photovoltaic assembly and the third photovoltaic assembly … …, namely the Mth photovoltaic assembly, so that the controller controls the switching of the working state of the circuit module according to the detection value of the pressure sensors.
Specifically, in the embodiment, in the first working state, the first photovoltaic module and the second photovoltaic module are connected in the same pole to form a closed loop; in a second working state, the first photovoltaic module, the second photovoltaic module and the third photovoltaic module are connected in series to form a closed loop, the first photovoltaic module and the second photovoltaic module are in heteropolar connection, the third photovoltaic module and the first photovoltaic module are in homopolar connection, and the third photovoltaic module and the second photovoltaic module are in homopolar connection; in a third working state, the first photovoltaic module, the second photovoltaic module, the third photovoltaic module and the fourth photovoltaic module are connected in series to form a closed loop, the first photovoltaic module and the second photovoltaic module are connected in a heteropolar mode, the second photovoltaic module and the third photovoltaic module are connected in a heteropolar mode, the fourth photovoltaic module and the first photovoltaic module are connected in a homopolar mode, and the fourth photovoltaic module and the third photovoltaic module are connected in a homopolar mode; and analogizing in sequence, in the working state of the A, the first photovoltaic module and the A photovoltaic module are connected in series to form a closed loop, wherein the A photovoltaic module is in homopolar connection with the A-1 photovoltaic module, the A photovoltaic module is in homopolar connection with the first photovoltaic module, the a photovoltaic module is in heteropolar connection with the a +1 photovoltaic module, A is more than or equal to 3 and less than or equal to M-1, and a is more than or equal to 1 and less than or equal to A-1.
Specifically, in this embodiment, the number of photovoltaic panels included in the second photovoltaic module, the number of photovoltaic panels included in the third photovoltaic module, and the number of photovoltaic panels included in the fourth photovoltaic module … …, and the number of photovoltaic panels included in the mth photovoltaic module are sequentially increased. In the embodiment shown in FIG. 2, the second photovoltaic module comprises 1 photovoltaic panel, the third photovoltaic module comprises 2 photovoltaic panels, the number of the photovoltaic panels contained in the nth photovoltaic module is 2 more than that contained in the (n-1) th photovoltaic module, n is more than or equal to 4 and less than or equal to M, namely, the number of the photovoltaic panels contained in the third photovoltaic module and the number of the photovoltaic panels contained in the fourth photovoltaic module … … are in an arithmetic progression, and the number of the photovoltaic panels contained in the mth photovoltaic module is equal to the number of the photovoltaic panels contained in the fourth photovoltaic module. In specific implementation, the number of photovoltaic panels included in the second photovoltaic module, the number of photovoltaic panels included in the third photovoltaic module, the number of photovoltaic panels included in the fourth photovoltaic module … …, and the number of photovoltaic panels included in the mth photovoltaic module may also be set to increase in an equal ratio series, for example, the setting is performed
Wherein
The number of the photovoltaic panels contained in the ith photovoltaic module is more than or equal to 2 and less than or equal to M.
Example 2
Referring to fig. 3, in the present embodiment, M =6 with respect to embodiment 1, that is, the photovoltaic power generation control system for realizing Domino snow melting by self-generation in the present embodiment includes 6 photovoltaic modules. During specific implementation, the photovoltaic panels can be grouped according to the number of the photovoltaic panels contained in the photovoltaic power generation system, wherein M can be a minimum value of 3, and a maximum value is the sum of the number of the photovoltaic panels contained in the photovoltaic power generation system.
The circuit module in the present embodiment includes conductive lines d12, d13, d14, d15, d16, d1, d2, d3, d4, d5, d61, d62, d63, d64, and d 65.
The first polarity terminal of the first photovoltaic module X1 is connected to the first polarity terminal of the second photovoltaic module X2, the first polarity terminal of the third photovoltaic module X3, the first polarity terminal of the fourth photovoltaic module X4, the first polarity terminal of the fifth photovoltaic module X5, and the first polarity terminal of the sixth photovoltaic module X6 through conductive lines d12, d13, d14, d15, and d16, respectively.
The second polarity terminal of the first photovoltaic module X1 is connected to the first polarity terminal of the second photovoltaic module X2 through the conductive trace d1, the second polarity terminal of the second photovoltaic module X2 is connected to the first polarity terminal of the third photovoltaic module X3 through the conductive trace d2, the second polarity terminal of the third photovoltaic module X3 is connected to the first polarity terminal of the fourth photovoltaic module X4 through the conductive trace d3, the second polarity terminal of the fourth photovoltaic module X4 is connected to the first polarity terminal of the fifth photovoltaic module X5 through the conductive trace d4, and the second polarity terminal of the fifth photovoltaic module X5 is connected to the first polarity terminal of the sixth photovoltaic module X6 through the conductive trace d 5.
The second polarity terminal of the sixth photovoltaic module X6 is connected to the second polarity terminal of the first photovoltaic module X1, the second polarity terminal of the second photovoltaic module X2, the second polarity terminal of the third photovoltaic module X3, the second polarity terminal of the fourth photovoltaic module X4, and the second polarity terminal of the fifth photovoltaic module X5 through conductive traces d61, d62, d63, d64, and d65, respectively.
Therefore, in the embodiment, the power generation mode of each photovoltaic module can be controlled by controlling the on-off of each conductive circuit.
When the d61, the d62 and the d12 are conducted, the first photovoltaic module X1 supplies power to the second photovoltaic module X2 in a reverse direction;
when the d1, the d62, the d63 and the d13 are conducted, the first photovoltaic module X1 and the second photovoltaic module X2 reversely supply power to the third photovoltaic module X3;
when the d1, the d2, the d63, the d64 and the d14 are conducted, the first photovoltaic module X1, the second photovoltaic module X2 and the third photovoltaic module X3 reversely supply power to the fourth photovoltaic module X4;
when the d1, the d2, the d3, the d64, the d65 and the d15 are conducted, the first photovoltaic module X1, the second photovoltaic module X2, the third photovoltaic module X3 and the fourth photovoltaic module X4 reversely supply power to the fifth photovoltaic module X5;
when the d1, the d2, the d3, the d4, the d65 and the d16 are conducted, the first photovoltaic module X1, the second photovoltaic module X2, the third photovoltaic module X3, the fourth photovoltaic module X4 and the fifth photovoltaic module X5 reversely supply power to the sixth photovoltaic module X6;
when the d1, the d2, the d3, the d4 and the d5 are turned on, the first photovoltaic module X1, the second photovoltaic module X2, the third photovoltaic module X3, the fourth photovoltaic module X4, the fifth photovoltaic module X5 and the sixth photovoltaic module X6 are connected in series to form a power supply for generating power for an external load, at this time, the first polarity terminal of the first photovoltaic module X1 serves as a first polarity terminal of the power supply, and the second polarity terminal of the sixth photovoltaic module X6 serves as a second polarity terminal of the power supply.
Specifically, in this embodiment, the switches may be arranged on the conductive lines, and the controller is connected to the switches, so that the controller controls the on/off of the corresponding conductive lines through the switches to control the power generation mode of the photovoltaic module.
Alternatively, referring to fig. 4, it is also possible to provide that the second polarity terminal of the first photovoltaic module X1 is connected to the conductive traces d1 and d61, respectively, through the relay SB 1; the first polarity terminal provided with the second photovoltaic module X2 is connected to the conductive lines d1 and d12 through the relay SA2, respectively, and the second polarity terminal provided with the second photovoltaic module X2 is connected to the conductive lines d2 and d62 through the relay SB2, respectively; the first polarity terminal provided with the third photovoltaic module X3 is connected to the conductive lines d2 and d13, respectively, through the relay SA3, and the second polarity terminal provided with the third photovoltaic module X3 is connected to the conductive lines d3 and d63, respectively, through the relay SB 3; the first polarity terminal provided with the fourth photovoltaic module X4 is connected to the conductive lines d3 and d14, respectively, through the relay SA4, and the second polarity terminal provided with the fourth photovoltaic module X4 is connected to the conductive lines d4 and d64, respectively, through the relay SB 4; the first polarity terminal provided with the fifth photovoltaic module X5 is connected to the conductive lines d4 and d15 through the relay SA5, respectively, and the second polarity terminal provided with the fifth photovoltaic module X5 is connected to the conductive lines d5 and d65 through the relay SB5, respectively; the first polarity terminal of the sixth photovoltaic module X6 is provided to be connected to the conductive traces d5 and d16, respectively, through the relay SA 6. Therefore, the controller is respectively connected with the relays so as to control the on-off of each conductive circuit by controlling the conducting direction of the relays.
Specifically, in this embodiment, the external load is connected to the circuit module through the power supply terminal out, the first polarity terminal of the first photovoltaic module X1 is connected to the first polarity terminal of the power supply terminal through the switch element, and the second polarity terminal of the sixth photovoltaic module X6 is connected to the second polarity terminal of the power supply terminal through the switch element, so that when the photovoltaic modules are reversely powered, the circuit module is disconnected from the external load through the switch element. The switching element may be a switch or a relay.
Example 3
Referring to fig. 5, the present embodiment is, with respect to embodiment 1, M =6, a circuit module including conductive lines t12, t23, t34, t45, t56, y12, y23, y34, y45, y56, t21, t31, t41, t51, and t 61.
The first polarity terminal of the first photovoltaic module X1 is connected to the first polarity terminal of the second photovoltaic module X2 and the second polarity terminal of the second photovoltaic module X2 by conductive traces t12 and y12, respectively;
the first polarity terminal of the second photovoltaic module X2 is connected to the first polarity terminal of the third photovoltaic module X3 and the second polarity terminal of the third photovoltaic module X3 by conductive traces t23 and y23, respectively;
the first polarity terminal of the third photovoltaic module X3 is connected to the first polarity terminal of the fourth photovoltaic module X4 and the second polarity terminal of the fourth photovoltaic module X4 by conductive traces t34 and y34, respectively;
the first polarity terminal of the fourth photovoltaic module X4 is connected to the first polarity terminal of the fifth photovoltaic module X5 and the second polarity terminal of the fifth photovoltaic module X5 by conductive traces t45 and y45, respectively;
the first polarity terminal of the fifth photovoltaic module X5 is connected to the first polarity terminal of the sixth photovoltaic module X6 and the second polarity terminal of the sixth photovoltaic module X6 by conductive traces t56 and y56, respectively;
the second polarity terminal of the second photovoltaic module X2, the second polarity terminal of the third photovoltaic module X3, the second polarity terminal of the fourth photovoltaic module X4, the second polarity terminal of the fifth photovoltaic module X5, and the second polarity terminal of the sixth photovoltaic module X6 are connected to the second polarity terminal of the first photovoltaic module X1 by conductive traces t21, t31, t41, t51, and t61, respectively.
Each of the conductive lines has two states of short circuit (on) and open circuit (off).
When the conductive traces t12 and t21 are conducted, the first photovoltaic module X1 supplies power to the second photovoltaic module X2 in a reverse direction;
when the conductive circuits y12, t23 and t31 are conducted, the first photovoltaic module X1 and the second photovoltaic module X2 supply power to the third photovoltaic module X3 in a reverse direction;
when the conductive circuits y12, y23, t34 and t41 are conducted, the first photovoltaic module X1, the second photovoltaic module X2 and the third photovoltaic module X3 reversely supply power to the fourth photovoltaic module X4;
when the conductive circuits y12, y23, y34, t45 and t51 are conducted, the first photovoltaic module X1, the second photovoltaic module X2, the third photovoltaic module X3 and the fourth photovoltaic module X4 supply power to the fifth photovoltaic module X5 in a reverse direction;
when the conductive circuits y12, y23, y34, y45, t56 and t61 are conducted, the first photovoltaic module X1, the second photovoltaic module X2, the third photovoltaic module X3, the fourth photovoltaic module X4 and the fifth photovoltaic module X5 reversely supply power to the sixth photovoltaic module X6;
when the conductive circuits y12, y23, y34, y45 and y56 are connected, the first photovoltaic module X1, the second photovoltaic module X2, the third photovoltaic module X3, the fourth photovoltaic module X4, the fifth photovoltaic module X5 and the sixth photovoltaic module X6 are connected in series to form a power supply for generating power for an external load, at this time, the first polarity terminal of the first photovoltaic module X1 is used as the first polarity terminal of the power supply, and the second polarity terminal of the sixth photovoltaic module X6 is used as the second polarity terminal of the power supply.
Specifically, in this embodiment, the switches may be arranged on the conductive lines, and the controller is connected to the switches, so that the controller controls the on/off of the corresponding conductive lines through the switches to control the power generation mode of the photovoltaic module.
Alternatively, referring to fig. 6, the first polarity terminal of the second photovoltaic module X2 is connected to the conductive lines t12, t23 and y23 through the relay RA2, the first polarity terminal of the third photovoltaic module X3 is connected to the conductive lines t23, t34 and y34 through the relay RA3, the first polarity terminal of the fourth photovoltaic module X4 is connected to the conductive lines t34, t45 and y45 through the relay RA4, the first polarity terminal of the fifth photovoltaic module X5 is connected to the conductive lines t45, t56 and y56 through the relay RA5, and the first polarity terminal of the sixth photovoltaic module X6 is connected to the conductive line t56 through the relay RA 6; the second polarity terminal of the second photovoltaic module X2 is connected to the conductive lines t21 and y12 through the relay RB2, the second polarity terminal of the third photovoltaic module X3 is connected to the conductive lines t31 and y23 through the relay RB3, the second polarity terminal of the fourth photovoltaic module X4 is connected to the conductive lines t41 and y34 through the relay RB4, the second polarity terminal of the fifth photovoltaic module X5 is connected to the conductive lines t51 and y45 through the relay RB5, and the second polarity terminal of the sixth photovoltaic module X6 is connected to the conductive lines t61 and y56 through the relay RB 6. Therefore, the controller is respectively connected with the relays so as to control the on-off of each conductive circuit by controlling the conducting direction of the relays.
Specifically, in the embodiment, the external load is connected to the circuit module through the power supply terminal out, the second polarity terminal of the first photovoltaic module X1 is connected to the second polarity terminal of the power supply terminal through the switching element, and the first polarity terminal of the sixth photovoltaic module X6 is connected to the first polarity terminal of the power supply terminal through the switching element, so that when the photovoltaic modules are reversely powered, the circuit module is disconnected from the external load through the switching element. The switching element may be a switch or a relay.
Specifically, in the present embodiment, the first polarity terminal of the sixth photovoltaic module X6 is connected to the first polarity terminal of the power supply terminal through the relay RA6, and the second polarity terminal of the first photovoltaic module X1 is directly connected to the second polarity terminal of the power supply terminal.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (8)
1. A method for controlling electric-heat conversion of a photovoltaic module to realize Domino type automatic snow melting is characterized by comprising the following steps:
when the first detection value reaches a first threshold value, the first photovoltaic module supplies power to the second photovoltaic module in a reverse direction;
when the second detection value reaches a second threshold value, reversely supplying power to a third photovoltaic module through the first photovoltaic module and the second photovoltaic module;
when the third detection value reaches a third threshold value, reversely supplying power to a fourth photovoltaic module through the first photovoltaic module, the second photovoltaic module and the third photovoltaic module;
and so on;
when the M-1 detection value reaches the M-1 threshold value, the M photovoltaic module is reversely powered through the first photovoltaic module to the M-1 photovoltaic module;
when the Mth detection value reaches the Mth threshold value, supplying power to an external load through the first photovoltaic module to the Mth photovoltaic module, wherein M is more than or equal to 5;
the second detection value is a current detection value for reversely supplying power to the second photovoltaic module by the first photovoltaic module, the J-th detection value is a current detection value for reversely supplying power to the J-th photovoltaic module from the first photovoltaic module to the J-1 th photovoltaic module, and J is more than or equal to 3 and less than or equal to M.
2. The method as claimed in claim 1, wherein the S-th detection value is a pressure detection value on the S-th photovoltaic module, and S is greater than or equal to 2 and less than or equal to M.
3. The method as claimed in claim 1, wherein the first detection value is an electrical parameter of the first to mth pv modules when supplying power to an external load.
4. The method for controlling electrothermal conversion of a photovoltaic module to realize Domino-type automatic snow melting according to claim 1, wherein the output power of the photovoltaic module I is greater than that of the photovoltaic module I-1, and I is greater than or equal to 3 and less than or equal to M.
5. The method for controlling electrothermal conversion of Domino-type automated snow on photovoltaic modules according to claim 4, wherein the number of photovoltaic panels included in the ith photovoltaic module is greater than the number of photovoltaic panels included in the ith-1 photovoltaic module.
6. The method for controlling electrothermal conversion of Domino-type automated snow on photovoltaic modules according to claim 1, wherein the photovoltaic panel included in the second photovoltaic module, the photovoltaic panel included in the third photovoltaic module to the photovoltaic panel included in the mth photovoltaic module are all mounted on the same inclined plane P; the photovoltaic panels on the inclined plane P are arranged in a matrix, the photovoltaic panels belonging to the Lth photovoltaic module are positioned below the photovoltaic panels belonging to the G th photovoltaic module in a row of photovoltaic panels along the inclined direction of the inclined plane P, and L is more than or equal to 2 and less than or equal to G and less than or equal to M.
7. The method for controlling electrothermal conversion of Domino-type automated snow by photovoltaic modules according to claim 6, wherein the photovoltaic panel included in the first photovoltaic module is installed on the inclined plane P.
8. The method for controlling electric-thermal conversion of a photovoltaic module to achieve Domino-type automatic snow melting according to claim 1 or 6, wherein a photovoltaic panel included in the first photovoltaic module is vertically installed.
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| CN201910499374.5A CN110138331B (en) | 2019-06-11 | 2019-06-11 | Electric-heat conversion control method for realizing Domino type automatic snow melting by photovoltaic module |
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| CN103227216A (en) * | 2013-04-25 | 2013-07-31 | 苏州盖娅智能科技有限公司 | Intelligent snow removing device and control method thereof |
| CN106571774B (en) * | 2016-10-28 | 2018-12-28 | 阳光电源股份有限公司 | A kind of solar panel snow-smelting method, controller and photovoltaic generating system |
| KR102012724B1 (en) * | 2017-09-19 | 2019-08-21 | 솔라시도코리아 주식회사 | Deicing equipment of solar panel and operating method thereof |
| CN109802632A (en) * | 2018-12-19 | 2019-05-24 | 汉能移动能源控股集团有限公司 | Snow melting method, solar junction box, solar power generation system, medium and equipment |
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