CN104756833A - Distributed gravity irrigation photovoltaic system for layer water lifting and energy storage - Google Patents
Distributed gravity irrigation photovoltaic system for layer water lifting and energy storage Download PDFInfo
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- CN104756833A CN104756833A CN201510142435.4A CN201510142435A CN104756833A CN 104756833 A CN104756833 A CN 104756833A CN 201510142435 A CN201510142435 A CN 201510142435A CN 104756833 A CN104756833 A CN 104756833A
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping
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Abstract
The invention belongs to the field of agricultural irrigation in hilly and mountain areas, and relates to a distributed gravity irrigation photovoltaic system for layer water lifting and energy storage. Hills are layered according to different altitudes, and each layer is provided with a photovoltaic pump system and is provided with a water storage tank; a photovoltaic plate is used for converting acquired solar energy into electric energy, a frequency conversion inverter is used for converting DC (Direct Current) voltage output by the photovoltaic plate into an AC (Alternating Current) voltage to drive a motor to operate, and a water pump is driven to pump water at a low water level to an upper water storage tank for storage by the motor; the system is used for storing the converted electric energy into the potential energy of water by using the difference of elevation of the hills, so as to realize layer water lifting and energy storage; furthermore, each layer of photovoltaic pump system is used for detecting the water level of the upper water storage tank by a liquid level sensor, and transmitting a water level signal to a remote control terminal through a wireless network, so as to prevent field watching and realize time saving and labor saving; in addition, the photovoltaic panel is small in floor area, low in lift and flexible and convenient to use; meanwhile, the electric energy storage cost is low, and the energy-saving irrigation can be effectively realized.
Description
Technical field
The present invention relates to utilization of new energy resources and field of agricultural irrigation, particularly a kind of distributed gravity irrigation photovoltaic system of layering pumping storage.
Background technology
At present, along with the day by day shortage of the energy and going from bad to worse of environment, the development and utilization of green clean energy resource provides the effective way solving the global energy and environmental crisis, and solar energy is one of the most reliable clean energy resource of current development and utilization.China's major part crop irrigation systems all adopts traditional diesel engine or electrical network as power source, and not only system cost is high, and easily pollutes environment.The photovoltaic water pump system occurred in recent years, the centralized water lift technological maheup agricultural irrigation systems of main employing, because water pump demand power is large, solar panel floor space is also comparatively large, the availability in soil is declined, does not meet the requirement of intensive agricultural.The patent No. is that the utility model patent of ZL201120454103.7 discloses a kind of solar energy pumping irrigation station, form primarily of cell panel, inverter, photovoltaic controller, power line and Large Copacity cistern, the described in a particular embodiment pump power of this patent is 9.2kW, solar panel just needs 115 pieces, floor space is comparatively large, and the cistern in this patent does not relate to accumulation of energy function, for water pump pressurization also will be reused during agricultural irrigation systems, cause energy waste.
Through retrieval, the open source literature found no based on the distributed gravity irrigation photovoltaic system in Hills of layering pumping storage is reported.
Summary of the invention
The object of this invention is to provide a kind of distributed gravity irrigation photovoltaic system based on Hills layering pumping storage, centralized high powered water pump system is become distributed small-power water pump system, the floor space of photovoltaic panel is reduced, and utilize the elevation of Hills, low power water pump system layering is arranged on the different elevations of Hills, the solar energy that photovoltaic panel is changed becomes the potential energy in pond, reach the object of accumulation of energy, when needing to irrigate, the potential energy had with upper strata cistern carries out gravity irrigation to lower floor crops, reach energy-conservation object, overcome the floor space adopting the agricultural irrigation systems of a centralized water lift technological maheup to exist large, energy consumption and high in cost of production problem.
Technical scheme of the present invention is: a kind of distributed gravity irrigation photovoltaic system of layering pumping storage, comprise some component layers and be arranged on photovoltaic water pump system in Different Altitude and cistern, every layer of described cistern is connected with water pipe by water pump, and every layer of described photovoltaic water pump system is used for cistern water lift described in last layer;
The variable frequency inverter that described photovoltaic water pump system comprises photovoltaic panel, is connected with described photovoltaic panel, described variable frequency inverter is connected with motor, described water pump and described cistern successively by frequency conversion inverter circuit;
Described photovoltaic panel converts the solar energy of collection to electric energy, the DC voltage conversion that described photovoltaic panel exports becomes alternating voltage with drive motors work by described variable frequency inverter, the water of low water level is extracted into cistern described in upper strata and stores by described driven by motor water pump, be the potential energy of water by electrical power storage, realize layering pumping storage;
Described variable frequency inverter is connected with controller, and described controller regulates the output voltage of described variable frequency inverter, thus realizes the control to described motor and described water pump.
In such scheme, described controller also comprises MPPT module, described MPPT module is connected with described photovoltaic panel, be used for differentiating whether described photovoltaic panel realtime power is maximum power point, and the maximum power point that described photovoltaic panel exports is followed the tracks of, make system works at the maximum power point place of described photovoltaic panel.
Further, described MPPT module calculates module by the power output of described controller and carries out real-time sampling to the output voltage of described photovoltaic panel and electric current, and calculate power output, along with the change of power output, the speed adjusting module of described controller carries out speed governing by the output voltage changing described frequency conversion inverter circuit to described motor, makes described water pump can export maximum flow under current light.
In such scheme, also comprise the liquid level sensor be arranged in every layer of described cistern, described liquid level sensor is connected with described controller; Described liquid level sensor detects the water level of described cistern in real time, water level signal is sent to the water level detecting module of described controller.
In such scheme, also comprise remote control terminal, described remote control terminal is connected with telegon, described water level signal is sent to described telegon by connected wireless signal transceiver by every layer of described controller, described telegon transfers signals to described remote control terminal, carry out data processing by described remote control terminal and send corresponding instruction, be sent to every layer of described wireless signal transceiver by described telegon again and be transferred to described controller, described controller controls the start and stop of described motor according to the instruction received, and realizes remote control.
Further, described controller is MSP430 single-chip microcomputer.
In such scheme, the height above sea level difference between adjacent two-layer described photovoltaic water pump system and described cistern is the same.
The invention has the beneficial effects as follows:
1, be applied in the present invention between the different layers of Hills and carry out layering pumping storage, electrical power storage photovoltaic panel changed is the potential energy of water in cistern, the gradient of water in the cistern of upper strata along hills is flow automatically, for irrigating the crops of low layer, and the photovoltaic water pump system of each layer forms a distributed network mutually.
2, each system of the present invention detects cistern water level by liquid level sensor, and the water level signal detected is communicated with remote control terminal by wireless network, realizes remote control and avoids on-the-spot guard, time saving and energy saving.
3, the photovoltaic panel floor space needed for this system is little, can install on the spot, use on the spot, digest electric energy on the spot, can not only fully and effectively utilize solar irradiation agricultural irrigation is carried out to Hills, and the problem solving electrical power storage overcomes that the floor space adopting the agricultural irrigation systems of a centralized water lift technological maheup to exist is large, energy consumption and high in cost of production problem, achieves energy-conservation irrigation.
4, system controller adopts MSP430 single-chip microcomputer to be processor, and it has super low-power consumption and high performance advantage.
Accompanying drawing explanation
Fig. 1 is distribution schematic diagram of the present invention.
Fig. 2 is system block diagram of the present invention.
Fig. 3 is MPPT maximum power point tracking flow chart.
Fig. 4 is radio communication flow chart.
In figure: 1, photovoltaic panel; 2, variable frequency inverter; 201, frequency conversion inverter circuit; 3, controller; 301, power output calculates module; 302, MPPT module; 303, speed adjusting module; 304, water level detecting module; 305, wireless signal receiver; 4, motor; 5, water pump; 6, cistern; 7, liquid level sensor; 8, telegon; 9, far-end control terminal.
Embodiment
In describing the invention, it will be appreciated that, term " on ", D score, "front", "rear", "left", "right", " top ", " end " " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail, but protection scope of the present invention is not limited to this.
As shown in Figure 1, in hills vertical direction, layering is carried out according to the difference of height above sea level, a set of photovoltaic water pump system is all installed and has been provided with cistern 6 for every layer and formed respective gravity irrigation system respectively, every layer of described cistern 6 is connected by water pump 5, and every layer of described photovoltaic water pump system is used for cistern described in last layer 6 water lift.
As shown in Figure 2, the variable frequency inverter 2 that described photovoltaic water pump system comprises photovoltaic panel 1, is connected with described photovoltaic panel 1, described variable frequency inverter 2 is connected with motor 4, described water pump 5 and described cistern 6 successively by frequency conversion inverter circuit 201;
Described photovoltaic panel 1 converts the solar energy of collection to electric energy, the DC voltage conversion that described photovoltaic panel 1 exports becomes alternating voltage to work with drive motors 4 by described variable frequency inverter 2, described motor 4 drives water pump 5 water of low water level is extracted into cistern 6 described in upper strata and stores, be the potential energy of water by electrical power storage, realize layering pumping storage.
Described variable frequency inverter 2 is connected with controller 3, and described controller 3 regulates the output voltage of described variable frequency inverter 2, thus realizes the control to described motor 4 and described water pump 5.
Described controller 3 also comprises MPPT module 302, described MPPT module 302 is connected with described photovoltaic panel 1, be used for differentiating whether described photovoltaic panel 1 realtime power is maximum power point, and the maximum power point that described photovoltaic panel 1 exports is followed the tracks of, make system works at the maximum power point place of described photovoltaic panel 1.
Described MPPT module 302 calculates module 301 by the power output of described controller 3 and carries out real-time sampling to the output voltage of described photovoltaic panel 1 and electric current, and calculate power output, along with the change of power output, the speed adjusting module 303 of described controller 3 carries out speed governing by the output voltage changing described frequency conversion inverter circuit 201 to described motor 4, makes described water pump 5 can export maximum flow under current light.
Every layer of described cistern 6 li is also provided with liquid level sensor 7, and described liquid level sensor 7 is connected with described controller 3; Described liquid level sensor 7 detects the water level of described cistern 6 in real time, and water level signal is sent to the water level detecting module 304 of described controller 3, described controller 3 controls the start and stop of described motor 4.
This system also comprises remote control terminal 9, described remote control terminal 9 passes through serial ports with telegon 8, parallel port or USB interface connect, described water level signal is sent to described telegon 8 by connected wireless signal transceiver 305 by every layer of described controller 3, described telegon 8 transfers signals to described remote control terminal 9 to carry out data processing and sends corresponding instruction, be sent to every layer of described wireless signal transceiver 305 by described telegon 8 again and be transferred to described controller 3, described controller 3 controls the start and stop of described motor 4 according to the instruction received, realize remote control.
Described controller 3 is MSP430 single-chip microcomputer.
Method of work of the present invention: the photovoltaic water pump system on each layer forms distributed network, and the duty of each system is independent of each other, during system worked well, when solar irradiation is mapped to the described photovoltaic panel 1 be combined into by polylith solar panel, described photovoltaic panel 1 converts solar energy to electric energy, namely DC voltage is exported, the DC voltage exported from described photovoltaic panel 1 is transformed into alternating voltage output through inverter circuit again after the frequency changer circuit boosting of described variable frequency inverter 2, the alternating voltage exported drives described motor 4 to operate under corresponding rotating speed, the described water pump 5 be now connected with motor shaft runs under identical rotating speed, the water of certain flow is extracted in the described cistern 6 of last layer, be the potential energy of water by electrical power storage, realize layering pumping storage, when the crops of this layer need water directly by the water in cistern described in upper strata 6, crop irrigation is used for by the mode of gravity flow.
Height above sea level difference between two-layer described photovoltaic water pump system adjacent in the present invention and described cistern 6 is the same, namely lift when described water pump 5 draws water between each layer is in the same size, by the impact of pump performance parameters, only when solar irradiation reaches certain intensity, i.e. water pump actual pump up water height higher than pump up water threshold value time, described water pump 5 could between adjacent two layers water lift, system could normal work.
Described controller 3 is with super low-power consumption, high performance MSP430 single-chip microcomputer is processor, described power output calculates the output voltage electric current of module 301 by real-time sampling photovoltaic array, and convert the voltage x current of analog quantity to digital quantity through 12 A/D and input described MSP430 single-chip microcomputer, by MPPT maximum power point tracking (MPPT) module, described MSP430 single-chip microcomputer differentiates whether this realtime power is maximum power point, and the maximum power point that described photovoltaic panel 1 exports is followed the tracks of, make system works at the maximum power point place of described photovoltaic panel 1, meanwhile along with the change of power output, described speed adjusting module 303 carries out speed governing by the output voltage that changes inverter circuit to motor, under making described water pump 5 be operated in corresponding operating mode, until described water pump 5 can export maximum flow under current light.Described water level detecting module 304 detects the height of water in described cistern 6 in real time by described liquid level sensor 7, and water level is fed back to described MSP430 single-chip microcomputer, water level signal is transferred to described wireless signal transceiver 305 by serial ports by described MSP430 single-chip microcomputer, then is transferred to described remote control terminal 9 by described wireless signal transceiver 305.
Power output due to described photovoltaic panel 1 is by the Determines of load, described photovoltaic panel 1 is made to be operated in its maximum power point place in order to make full use of solar irradiation, answer the peak power of photovoltaic panel 1 described in real-time tracking and the duty of regulating load, the peak power under making the power output of described photovoltaic panel 1 be current light.Principle such as Fig. 3 of MPPT maximum power point tracking (MPPT) shows, by the A/D module of described MSP430 single-chip microcomputer to the output voltage (U of cell panel
o), electric current (I
o) carry out real-time sampling, and calculate power output (P
o), then disturbance △ U is applied to output voltage, compare the changed power before and after disturbance, constantly regulate the duty of motor and water pump until the stable output power of described photovoltaic panel 1 is at maximum power point place, make described photovoltaic panel 1 Maximum Power Output.
The described photovoltaic water pump system of every layer detects the water level in described cistern 6 by described liquid level sensor 7, and water level signal is sent to aggregation node by described wireless signal transceiver 305, i.e. described telegon 8, finally transfer signals to described remote control terminal 9, carry out data processing and send corresponding instruction, and be sent to separate described photovoltaic water pump system by described wireless signal transceiver 305, realize radio detection cistern water level and the running status of each distributed photovoltaic water pump system of remote control.
Wherein wireless telecommunications flow process as shown in Figure 4, when described liquid level sensor 7 detects the water level signal in described cistern 6, MSP430 SCM program calls wireless communication module, hardware is initialized, find and the receiving system of matching connection, set up network, after network is successfully established, decoded water level signal is transferred to described telegon 8 by described wireless signal transceiver 305 by described MSP430 single-chip microcomputer, described telegon 8 communications interface transmission gives described remote control terminal 9, described remote control terminal 9 pairs of signals are analyzed, and provide corresponding operational order, described MSP430 single-chip microcomputer reception of wireless signals module is passed to by communication interface.
The present invention is applicable to the agricultural irrigation of Hills, the water of bottom is adjusted toward upper strata step by step, meet the demand of agricultural irrigation, and the photovoltaic water pump system on an each layer in hills forms a distributed sensor network, and controlled by a remote terminal, exempt from on-the-spot guard, time saving and energy saving.Photovoltaic panel floor space needed for this system is little, can install on the spot, use on the spot, digest electric energy on the spot, can not only fully and effectively utilize solar irradiation agricultural irrigation is carried out to Hills, and the problem solving electrical power storage overcomes that the floor space adopting the agricultural irrigation systems of a centralized water lift technological maheup to exist is large, energy consumption and high in cost of production problem, achieves energy-conservation irrigation.
Described embodiment is preferred embodiment of the present invention; but the present invention is not limited to above-mentioned embodiment; when not deviating from flesh and blood of the present invention, any apparent improvement that those skilled in the art can make, replacement or modification all belong to protection scope of the present invention.
Claims (7)
1. the distributed gravity irrigation photovoltaic system of a layering pumping storage, it is characterized in that, comprise some component layers and be arranged on photovoltaic water pump system in Different Altitude and cistern (6), every layer of described cistern (6) is connected by water pump (5) and water-supply-pipe, and every layer of described photovoltaic water pump system is used for cistern described in last layer (6) water lift;
The variable frequency inverter (2) that described photovoltaic water pump system comprises photovoltaic panel (1), is connected with described photovoltaic panel (1), described variable frequency inverter (2) is connected with motor (4), described water pump (5) and described cistern (6) successively by frequency conversion inverter circuit (201);
Described photovoltaic panel (1) converts the solar energy of collection to electric energy, the DC voltage conversion that described photovoltaic panel (1) exports becomes alternating voltage to work with drive motors (4) by described variable frequency inverter (2), described motor (4) drives water pump (5) water of low water level is extracted into cistern described in upper strata (6) and stores, be the potential energy of water by electrical power storage, realize layering pumping storage;
Described variable frequency inverter (2) is connected with controller (3), described controller (3) regulates the output voltage of described variable frequency inverter (2), thus realizes the control to described motor (4) and described water pump (5).
2. the distributed gravity irrigation photovoltaic system of a kind of layering pumping storage according to claim 1, it is characterized in that, described controller (3) also comprises MPPT module (302), described MPPT module (302) is connected with described photovoltaic panel (1), be used for differentiating whether described photovoltaic panel (1) realtime power is maximum power point, and the maximum power point that described photovoltaic panel (1) exports is followed the tracks of, make system works at the maximum power point place of described photovoltaic panel (1).
3. the distributed gravity irrigation photovoltaic system of a kind of layering pumping storage according to claim 2, it is characterized in that, described MPPT module (302) calculates module (301) by the power output of described controller (3) and carries out real-time sampling to the output voltage of described photovoltaic panel (1) and electric current, and calculate power output, along with the change of power output, the speed adjusting module (303) of described controller (3) carries out speed governing by the output voltage changing described frequency conversion inverter circuit (201) to described motor (4), described water pump (5) is made can maximum flow to be exported under current light.
4. the distributed gravity irrigation photovoltaic system of a kind of layering pumping storage according to claim 1, it is characterized in that, also comprise and be arranged on the inner liquid level sensor (7) of every layer of described cistern (6), described liquid level sensor (7) is connected with described controller (3); Described liquid level sensor (7) detects the water level of described cistern (6) in real time, water level signal is sent to the water level detecting module (304) of described controller (3).
5. the distributed gravity irrigation photovoltaic system of a kind of layering pumping storage according to claim 1 or 4, it is characterized in that, also comprise remote control terminal (9), described remote control terminal (9) is connected with telegon (8), described water level signal is sent to described telegon (8) by connected wireless signal transceiver (305) by every layer of described controller (3), described telegon (8) transfers signals to described remote control terminal (9), carry out data processing by described remote control terminal (9) and send corresponding instruction, be sent to every layer of described wireless signal transceiver (305) by described telegon (8) and be transferred to described controller (3) again, described controller (3) controls the start and stop of described motor (4) according to the instruction received, realize remote control.
6. the distributed gravity irrigation photovoltaic system of a kind of layering pumping storage according to claim 5, is characterized in that, described controller (3) is MSP430 single-chip microcomputer.
7. the distributed gravity irrigation photovoltaic system of a kind of layering pumping storage according to claim 1, is characterized in that, the height above sea level difference between adjacent two-layer described photovoltaic water pump system and described cistern (6) is the same.
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Cited By (14)
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| ES2608527A1 (en) * | 2017-01-19 | 2017-04-11 | Universidad Politécnica de Madrid | Photovoltaic pumping system hydraulically hybridized with the electric network or with diesel groups for irrigation applications (Machine-translation by Google Translate, not legally binding) |
| ES2619555A1 (en) * | 2017-02-06 | 2017-06-26 | Universidad Politécnica de Madrid | System of irrigation by photovoltaic pumping electrically hybridized (Machine-translation by Google Translate, not legally binding) |
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