CN201103546Y - High-efficiency photovoltaic water pump system - Google Patents
High-efficiency photovoltaic water pump system Download PDFInfo
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- CN201103546Y CN201103546Y CN 200720055204 CN200720055204U CN201103546Y CN 201103546 Y CN201103546 Y CN 201103546Y CN 200720055204 CN200720055204 CN 200720055204 CN 200720055204 U CN200720055204 U CN 200720055204U CN 201103546 Y CN201103546 Y CN 201103546Y
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- 238000007599 discharging Methods 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 2
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- 230000000694 effects Effects 0.000 description 5
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- 241001465754 Metazoa Species 0.000 description 2
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- 239000002253 acid Substances 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 239000003673 groundwater Substances 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The utility model discloses an efficient photovoltaic pump system, which belongs to the technology field of solar photovoltaic utilization. The photovoltaic pump system mainly comprises a solar cell photovoltaic array, a motor, a DC/AC converter, a water pump, a storage battery group, a charge-discharge controller, a controller and a water pressure sensor. The solar cell photovoltaic array is used for absorbing sunshine energy that is stored in the storage battery for meeting the need when the sunshine is weak or sunshine does not exist. The absorbed or the stored energy is provided for various motors through a power converter or a DC motor driver to drive the pump for water lifting. At the same time, a water pressure detection device is adopted for the detection and the closed loop control to the water pressure. The method of 'peak load shifting' is adopted for improving the efficiency of the photovoltaic pump system and leading the system to pump water in more time, thus achieving the most optimization of the system efficiency and the maximum of water yield. The efficient photovoltaic pump system has the advantages of no contamination, full-automation and high reliability, etc.
Description
Technical field
The utility model belongs to the photovoltaic water pump technical field, specifically is a kind of high efficiency photovoltaic water pump system that utilizes device for detecting water pressure to detect hydraulic pressure and control according to hydraulic pressure.
Background technique
In the many areas of China, amount of precipitation is few, arid throughout the year, the growth of vegetation is restricted, human domestic water supply is difficulty very, but these regional solar energy resourceses are very abundant, also have goodish groundwater resources, best solution is to utilize local abundant solar energy resources, and exploitation need not fuel consumption, pollution-free, be convenient to carrying, photovoltaic water pump system easy to maintenance is installed, abundant underground water is caused the face of land by water pump, the supply people and animals drink and vegetation is irrigated, to solving rural area, China various places especially potable water and the vegetation irrigation of western China, to promoting regional economic development and preventing that desertification from playing important effect.
Because photovoltaic water pump system costs an arm and a leg, its efficient has key effect to applying of photovoltaic water pump system.By the structure of photovoltaic water pump system as can be known, photovoltaic water pump system is made of photovoltaic array, power converter, motor and water pump four parts usually, and system effectiveness can be described by the product form of each component efficiencies in the system, promptly
η in the formula
i(t) be the momentary efficiency of i parts of system, n is the number of components in the system.For photovoltaic water pump system, the representation of its system's momentary efficiency can be write:
η
s(t)＝η
sp(t)η
i(t)η
m(t)η
p(t) (2)
η in the formula
Sp(t) be the instantaneous conversion efficiency of solar cell, η
i(t) be the momentary efficiency of variable frequency inverter, η
m(t) be the momentary efficiency of motor, η
p(t) be the momentary efficiency of water pump.Be the plotted curve of the efficient of photovoltaic water pump system as shown in Figure 1 with the intensity of sunshine variation.
At present, the method that improves photovoltaic water pump system pump efficient mainly is the parameter matching of adjusting between photovoltaic array, inverter, motor and the water pump, takes all factors into consideration in conjunction with the factors such as load characteristic of machine, pump, thereby determines a kind of reasonable configuration scheme.But this method is before the design photovoltaic water pump system, need investigate meticulously hydrologic condition (static water level and dynamic water level) and weather conditions (size of intensity of sunshine and situation of change) that ground is installed, and need carry out a large amount of field experiment, and be subjected to meteorological condition effect very big.On the other hand,, make that photovoltaic water pump system can't start when sunshine was more weak, cause solar energy to waste because the startup of water pump needs certain energy.In addition, when illumination is strong, water pump pumps the water that comes and obtains a lot of energy, because its static lift is constant, extra transformation of energy is its kinetic energy, makes its flow velocity increase, and water outlet hydraulic pressure raises, in fact in many application, we only need water carried to the face of land does not need it to satisfy the hydraulic pressure index.Therefore, even if the parameter configuration of photovoltaic water pump system is best, its pump efficient also is difficult to surpass 90%.
The model utility content
In order to be electric energy farthest with conversion of solar energy, improve the effective rate of utilization of photovoltaic water pump, system was pumped up water in the more time, reach the optimization and the maximized purpose of water-outlet quantity of system effectiveness, the utility model provides a kind of and has increased photovoltaic water pump efficient to make its scheme that obtains more to have more the water yield be a kind of high efficiency photovoltaic water pump system.The utility model system disposition has battery pack and hydraulic pressure sensor, pass through controller, hydraulic pressure situation according to pump outlet, portion of energy is stored in the storage battery in strong at sunshine, and at sunshine when more weak storage battery give off energy, make photovoltaic water pump system be operated in the peak efficiency state.
The technological scheme that the utility model adopted is as follows: a kind of high efficiency photovoltaic water pump system, mainly comprise solar energy photovoltaic array, motor, DC/AC transducer, water pump, the solar energy photovoltaic array directly links to each other with the DC/AC transducer, it is characterized in that: native system also comprises battery pack, the charging-discharging controller that is connected between solar energy photovoltaic array and the DC/AC transducer, be connected the controller between battery pack and the DC/AC transducer, the water outlet of described water pump is equipped with hydraulic pressure sensor; Is direct current by the solar energy photovoltaic array with solar energy converting, then by DC/AC transducer drive motor, thereby driving water pump fetches water, controller is by the real-time monitoring of hydraulic pressure sensor realization to pump outlet hydraulic pressure, and control discharging and recharging of DC/AC transducer and battery pack, thereby improve the efficient of system according to the hydraulic pressure situation.
Be connected with the DC/DC transducer between described solar energy photovoltaic array and the DC/AC transducer, the output energy of solar energy photovoltaic array is earlier by DC/DC transducer (keep when mainly being convenient to MPPT and being MPPT maximum power point tracking dc voltage stable), again by the DC/AC transducer with energy transport to motor.
Described motor is a direct current generator, and described DC/AC converter using direct current motor drive circuit replaces.
Described charging-discharging controller can adopt diode, relay, contactor or switch to replace.
Described battery pack can adopt energy storage devices such as capacitor and super capacitor to replace, and charging-discharging controller is done corresponding conversion simultaneously.
System has at least one solar energy photovoltaic array, at least one water pump and at least one hydraulic pressure sensor, is direct current by the solar energy photovoltaic array with solar energy converting, dragging water pump by DC/AC conversion drive circuit again fetches water, control power converter on this basis by the real-time monitoring of hydraulic pressure sensor realization, and according to the hydraulic pressure situation to pump outlet hydraulic pressure.
Shown in the accompanying drawing 2 lift～rating curve figure, the wherein H of photovoltaic water pump
0DCA is a pipeline characteristic curve.In the more weak moment at sunshine, the rotating speed of photovoltaic water pump is slower, is n
1, this moment, the lift of photovoltaic water pump system was H
1, flow is Q
1, when sunshine was strong, motor speed raise and is n
2, this moment, the operation point of photovoltaic water pump was transferred to the C point by the D point, and its flow also correspondingly increases to Q
2, and if we are controlled at H according to the hydraulic pressure of photovoltaic water pump with its lift
1When neighbouring, its flow is Q
1, its dump energy is stored in the storage battery, therefore can move the longer time, and its equivalent flow can reach Q
0This shows that the amount of pumping up water of photovoltaic water pump system will increase, its efficient also correspondingly is improved.
Technique effect of the present utility model is:
1. utilize the photovoltaic effect of solar cells that transform light energy is electric energy, output energy with photovoltaic array, give motor and water pump by the DC/AC transducer with energy transfer again, perhaps the energy of directly photovoltaic array being exported passes to motor by the DC/AC transducer, drives water pump from water source water lifts such as deep-well, river, river, lake, the pools.
2. employing hydraulic pressure closed loop control method is exported by pump outlet hydraulic pressure being detected in real time the conversion of controlling power converter, thereby improves the efficient of photovoltaic water pump system easily and effectively.
3. adopt battery pack to store a part of sunshine energy of sunshine when strong, and energy is supplied with water pump when more weak at sunshine.The mode of this " peak shifting and valley filling " makes photovoltaic water pump system can reach best efficiency state.
Description of drawings
Fig. 1 is the plotted curve that the efficient of photovoltaic water pump system changes with intensity of sunshine;
Fig. 2 is photovoltaic water pump system " lift-flow " performance diagram;
Fig. 3 is the structural representation of the utility model system embodiment;
Fig. 4 is the control flow chart of Fig. 3 middle controller;
Fig. 5 is the utility model system architecture schematic representation that has the DC/DC transducer;
Fig. 6 is the hydraulic pressure feedback photovoltaic water pump system allocation plan of three-phase direct-current brushless motor;
Fig. 7 has the DC/DC transducer, adopts the system architecture schematic representation of three-phase direct-current brushless motor.
Embodiment
Below in conjunction with drawings and Examples the utility model system is described further.
Be an embodiment of the utility model system as shown in Figure 3.It mainly is made up of solar cells photovoltaic array 1, motor 2, DC/AC transducer 3, water pump 4, battery pack 5, charging-discharging controller 6, controller 7, hydraulic pressure sensor 8.Solar energy photovoltaic array 1 directly links to each other with DC/AC transducer 3, and battery pack 5 and charging-discharging controller 6 are connected between solar energy photovoltaic array 1 and the DC/AC transducer 3, and controller 7 is connected between battery pack 5 and the DC/AC transducer 3.Hydraulic pressure sensor 8 is installed in the water outlet of water pump 4.Native system is direct current by solar energy photovoltaic array 1 with solar energy converting, then by DC/AC transducer drive motor 2, thereby driving water pump 4 fetches water, the real-time monitoring that controller 6 is realized pump outlet hydraulic pressure by hydraulic pressure sensor 8, and control discharging and recharging of DC/AC transducer 3 and battery pack 5, thereby improve the efficient of system according to the hydraulic pressure situation.
Solar cells photovoltaic array 1 adopts the HIT of Sanyo high efficiency solar cell to constitute, and is electric energy with solar energy converting; Battery pack 5 adopts lead-acid batterys, in order to store the energy of surplus when strong at sunshine; The charging-discharging controller 6 of battery pack 5 adopts two-way DC/DC transducer, can control the charging rate and the degree of depth of storage battery, can control its generating speed and degree of depth again, and two-way DC/DC converter switches device adopts Mitsubishi's high-speed intelligent power model (IPM module).DC/AC transducer 3 mainly is made of IPM module and auxiliary cicuit thereof, adopts the topological structure of three phase full bridge, and it is transformed to the load of Ac supply pump with the direct current of photovoltaic array output; Motor 2 adopts three-phase AC asynchronous motor, and water pump 4 adopts deep well submerged pump, and motor and water pump adopt integral structure, and underground water is caused the face of land by submersible pump by aqueduct, and the supply people and animals drink with vegetation and irrigate; Controller 7 is with TS320F2812 DSP digital signal processor (DSP) chip, LCD MODULE and keyboard etc. are equipped with, to system condition detect, the control signal of output DC/AC transducer and battery pack charging-discharging controller after the analytical calculation, through the device for power switching in photoelectricity isolation rear driving DC/AC transducer and the battery pack charging-discharging controller, realize the coordination control between DC/AC transducer and the battery pack charging-discharging controller, its control flow block diagram as shown in Figure 4.Hydraulic pressure sensor 8 adopts the full digital hydraulic pressure sensor, exports the 0-4V voltage signal corresponding with hydraulic pressure, is sent to the TMS320F2812 chip and carries out the A/D sampling analysis after signal processing circuit.
Native system is determined the discharge and recharge speed of charging-discharging controller to battery pack 5 by the hydraulic pressure that hydraulic pressure sensor 8 detects water pump output, makes whole system be in the highest state of whole efficiency.When illumination intensity was big, water outlet hydraulic pressure raise and makes the portion of energy of photovoltaic array be converted into the kinetic energy of water, made that the water-outlet quantity of photovoltaic water pump reduces under identical photovoltaic array output energy.And under the more weak situation of illumination intensity, part water can't flow out well head because energy is not enough, and this makes the output energy of the following photovoltaic array of low light level photograph lose in a large number.For this reason, at sunshine strong in, by water pressure monitoring, it is stabilized under certain optimum hydraulic pressure, and energy remaining is stored in the energy storage device pump outlet, when intensity of sunshine is more weak, energy is discharged, replenish the output energy of photovoltaic array.The way of carrying out " peak shifting and valley filling " according to hydraulic pressure can improve the efficient of photovoltaic water pump system, obtains more water-outlet quantity.
System realizes the maximal power tracing of the photovoltaic array Comprehensive Control by DC/AC transducer and accumulator cell charging and discharging controller, the control target that is the DC/AC transducer is the maximal power tracing (MPPT) of photovoltaic array, it is realized by the degree of modulation of control DC/AC transducer PWM modulation, satisfying under the prerequisite of this condition, hydraulic pressure according to photovoltaic water pump adopts proportional integral (PI) controller to regulate charging and discharging of accumulator speed, reaches the purpose of hydraulic pressure control.The hydraulic pressure setting value is adjusted according to changes of seasons, and Various Seasonal is provided with different hydraulic pressure reference values.
As shown in Figure 5, native system can increase DC/DC transducer 9 between solar energy photovoltaic array 1 and DC/AC transducer 3, keeps dc voltage stable when mainly being convenient to MPPT and being MPPT maximum power point tracking.The output energy of solar energy photovoltaic array 1 is given motor 2 by the DC/AC transducer with energy transport more earlier by DC/DC transducer 9.The maximal power tracing of photovoltaic array is realized by the control of DC/AC transducer.For the requirement of the motor that adapts to dissimilar and characteristics, the DC/AC transducer can replace with dissimilar transducers or motor-drive circuit, as shown in Figure 6 and Figure 7.
This photovoltaic water pump system that has the hydraulic pressure feedback means, employing is different from the method that tradition improves the efficient of photovoltaic water pump system, only need add the efficient that a hydraulic pressure sensor just can improve photovoltaic water pump, implementation algorithm is also fairly simple, is a kind of solution of less expensive.
Claims (6)
1, a kind of high efficiency photovoltaic water pump system, mainly comprise solar energy photovoltaic array [1], motor [2], DC/AC transducer [3], water pump [4], solar energy photovoltaic array [1] directly links to each other with DC/AC transducer [3], it is characterized in that: native system also comprises battery pack [5], the charging-discharging controller [6] that is connected between solar energy photovoltaic array [1] and the DC/AC transducer [3], be connected the controller [7] between battery pack [5] and the DC/AC transducer [3], the water outlet of described water pump [4] is equipped with hydraulic pressure sensor [8]; Is direct current by solar energy photovoltaic array [1] with solar energy converting, then by DC/AC transducer drive motor [2], thereby driving water pump [4] fetches water, controller [6] is by the real-time monitoring of hydraulic pressure sensor [8] realization to pump outlet hydraulic pressure, and control discharging and recharging of DC/AC transducer [3] and battery pack [5], thereby improve the efficient of system according to the hydraulic pressure situation.
2, photovoltaic water pump system according to claim 1, it is characterized in that being connected with DC/DC transducer [9] between described solar energy photovoltaic array [1] and the DC/AC transducer [3], the output energy of solar energy photovoltaic array [1] is given motor [2] by the DC/AC transducer with energy transport more earlier by DC/DC transducer [9].
3, photovoltaic water pump system according to claim 1 and 2 is characterized in that described motor [2] is a direct current generator, and described DC/AC transducer [3] adopts direct current motor drive circuit to replace.
4, photovoltaic water pump system according to claim 1 and 2, described charging-discharging controller [6] can adopt diode to replace.
5, photovoltaic water pump system according to claim 3, described charging-discharging controller [6] can adopt diode, relay, contactor or switch to replace.
6, photovoltaic water pump system according to claim 1 is characterized in that described battery pack [5] can adopt energy storage devices such as capacitor and super capacitor to replace, and charging-discharging controller [6] is done corresponding conversion simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720055204 CN201103546Y (en) | 2007-08-06 | 2007-08-06 | High-efficiency photovoltaic water pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720055204 CN201103546Y (en) | 2007-08-06 | 2007-08-06 | High-efficiency photovoltaic water pump system |
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| CN201103546Y true CN201103546Y (en) | 2008-08-20 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251549A (en) * | 2011-04-29 | 2011-11-23 | 宜春市龙腾机械电气有限公司 | Solar photovoltaic full-automatic tower-free water supply method and water supply system thereof |
| CN102774916A (en) * | 2012-08-21 | 2012-11-14 | 青岛炅阳光伏科技有限公司 | Photovoltaic seawater desalting system |
| CN103291593A (en) * | 2013-06-09 | 2013-09-11 | 北京吉阳技术股份有限公司 | Control method for photovoltaic water pump system |
| CN104805888A (en) * | 2015-04-07 | 2015-07-29 | 南京欧陆电气传动有限公司 | Photovoltaic water pumping system |
| CN105186970A (en) * | 2015-08-30 | 2015-12-23 | 湖北金福阳科技有限公司 | Capacitive buffering and collecting system for independent solar or wind power generation |
| CN105201866A (en) * | 2015-10-27 | 2015-12-30 | 余雷 | High-efficiency low-consumption solar pump |
| CN109058121A (en) * | 2018-08-30 | 2018-12-21 | 深圳市迈凯诺电气股份有限公司 | A kind of photovoltaic intelligent collection control water pumping system and control method based on MPPT algorithm |
-
2007
- 2007-08-06 CN CN 200720055204 patent/CN201103546Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251549A (en) * | 2011-04-29 | 2011-11-23 | 宜春市龙腾机械电气有限公司 | Solar photovoltaic full-automatic tower-free water supply method and water supply system thereof |
| CN102774916A (en) * | 2012-08-21 | 2012-11-14 | 青岛炅阳光伏科技有限公司 | Photovoltaic seawater desalting system |
| CN103291593A (en) * | 2013-06-09 | 2013-09-11 | 北京吉阳技术股份有限公司 | Control method for photovoltaic water pump system |
| CN103291593B (en) * | 2013-06-09 | 2016-06-29 | 北京吉阳技术股份有限公司 | A kind of control method being applied to photovoltaic water pump system |
| CN104805888A (en) * | 2015-04-07 | 2015-07-29 | 南京欧陆电气传动有限公司 | Photovoltaic water pumping system |
| CN105186970A (en) * | 2015-08-30 | 2015-12-23 | 湖北金福阳科技有限公司 | Capacitive buffering and collecting system for independent solar or wind power generation |
| CN105201866A (en) * | 2015-10-27 | 2015-12-30 | 余雷 | High-efficiency low-consumption solar pump |
| CN109058121A (en) * | 2018-08-30 | 2018-12-21 | 深圳市迈凯诺电气股份有限公司 | A kind of photovoltaic intelligent collection control water pumping system and control method based on MPPT algorithm |
| CN109058121B (en) * | 2018-08-30 | 2023-12-29 | 深圳市迈凯诺电气股份有限公司 | Main machine fault and disconnection control method and utilization rate method of light Fu Zhineng centralized control water lifting system based on MPPT algorithm |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20100806 |