CN201474941U

CN201474941U - Solar photovoltaic intelligent control variable frequency water pump system

Info

Publication number: CN201474941U
Application number: CN2009201868834U
Authority: CN
Inventors: 余海东
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-10
Filing date: 2009-08-10
Publication date: 2010-05-19
Anticipated expiration: 2019-08-10

Abstract

The utility model relates to a solar photovoltaic intelligent control variable frequency water pump system, which comprises a solar photovoltaic cell and a water pump, wherein a universal frequency converter is connected between the solar photovoltaic cell and the water pump; and the part of a controller of the universal frequency converter is internally provided with a maximum power point tracking (MPPT) photovoltaic control module. The controller is externally connected with a water level sensor for drying protection. The water pump system is simple, practical, small in volume, light in weight, convenient for carrying, flexible in installation, easy for operation, high in efficiency and less in consumption, and can reach more than 95% of effect in an inductive load so as to double the effect compared with the prior art. Furthermore, the system has low fault probability, greatly improved stability and wider requirements for the using environment and water quality, thus being widely applied to agricultural irrigation, drinking water and fountain and having certain practical significance for desert control.

Description

Photovoltaic intelligent control variable frequency pump system

Technical field

The utility model relates to pump equipment, is specifically related to a kind of water pump system with the photovoltaic solar power supply.

Background technique

Existingly mainly be made of solar cell, controller, inverter, storage battery solar photovoltaic powered water pump system, solar cell charges a battery by controller, drags water pump after giving the inverter inversion by storage battery again.This traditional mode efficient is low, and cost is big, the rate of fault height, and the life-span is short.And the photovoltaic water pump technical bottleneck of having come out is comparatively obvious, ripe relatively in the world also only has for companies such as German Ben Te-Lao Lunsi, Dutch Grandfos, Mitsubishis, but the brushless water pump of the relative conventional AC of its technology is quite backward, practice shows that these products have very big defective in actual applications, it is also very high to requirements in water quality, can't be applied to desert agricultural and plateau section water quality.It costs an arm and a leg simultaneously, is difficult in agricultural production and the life to promote.There is following defective the said goods in it:

1. with high costs, because need very big solar cell power, often need to be several times as much as the power of load, also need controller and inverter, inverter power generally need be amplified to 5 to 10 times of bearing power, the storage battery cost is also very high, because circulate discharge mode deeply, it just needs to change about less than 3 years.

2. efficient is low, and the power factor of controller and inverter is 0.8, and accumulator cell charging and discharging respectively has 15% loss, adds that idle factors such as system's insertion loss account for about 50%, and efficient is low.

3. equipment is complicated heavy, and volume is big, is unfavorable for installing and using, and particularly is unfavorable for using in agriculture field.

4. system reliability is poor, safeguards that frequently, controller and inverter are owing to load shock load, its rate of fault height.The life-span that influences that storage battery is subjected to environment can seriously change, and needs professional workforce's maintaining.

Summary of the invention

At the use inverter and the storage battery that exist in the above-mentioned prior art, expensive, the structural load that drags by inverter that water pump brings, poor efficiency, poor reliability and the high problem of maintenance cost again, the purpose of this utility model is to provide a kind of photovoltaic and general water pump coupling system, this system effectiveness height, loss is little, simple and practical, volume is little in light weight, and has stability preferably.

The utility model is the technological scheme that its purpose of realization is taked: photovoltaic intelligent control variable frequency pump system, comprise solar-energy photo-voltaic cell and water pump, between described solar-energy photo-voltaic cell and water pump, connect universal frequency converter, the built-in MPPT MPPT maximum power point tracking of the controller part photovoltaic control module of universal frequency converter (MPPT is an english abbreviation, its contain mean MPPT maximum power point tracking).

The external level sensor of described controller is beaten and is done protection.

The utility model adopts control module+universal frequency converter, and these two kinds of product technologies are very ripe, and Maintenance free directly drives water pump.The power of solar module only needs 1.5 times of pump power, and cost is relatively low.The MPPT controller is realized MPPT maximum power point tracking, and voltage maintains certain limit, and electric current changes with the Strength Changes of illumination, and the rotating speed of water pump and lift be change thereupon also, realizes that so maximum utilizes solar cell institute electricity.

The beneficial effects of the utility model: this system is simple and practical, and little in light weight being easy to carry of volume is flexible for installation, easy to operate.The efficient height, loss is little, can reach the effect more than 95% in inductive load, is doubled with respect to prior art.Probability of malfunction is little, and stability has obtained large increase, and is all broad to Environmental Conditions and water quality requirement.This system cost only is existing 20%, can be in agricultural irrigation, and drinking-water, extensive use in the fountain also has certain realistic meaning to administering the desert.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Fig. 1 is the utility model structured flowchart;

Fig. 2 connects schematic representation for the utility model circuit;

Fig. 3 is the utility model MPPT MPPT maximum power point tracking control module I/V working principle plotted curve.

Embodiment

The utility model is that water pump is directly driven by solar-energy photo-voltaic cell, will contain the controller part that MPPT MPPT maximum power point tracking control module is built in frequency variator, need not to provide the photovoltaic special converter again.

Fig. 1 is the utility model system architecture diagram.Solar-energy photo-voltaic cell 1 links with universal frequency converter 2, and MPPT MPPT maximum power point tracking photovoltaic control module is built in MPPT photovoltaic water pump controller 3, and universal frequency converter 2 connects alternately with MPPT photovoltaic water pump controller 3.2 actions of MPPT photovoltaic water pump controller 3 control universal frequency converters, thus make water pump operation.This system mainly disposes solar-energy photo-voltaic cell 1, MPPT photovoltaic water pump controller 3, universal frequency converter 2 and water pump 4, and the voltage of solar-energy photo-voltaic cell 1 and water pump 4 voltages are complementary.Wherein, the concrete model of universal frequency converter and water pump can be according to the field condition flexible configuration.Even flow and lift are being required bigger occasion (as agricultural irrigation), this kind design also makes the user need not to select expensive water pump special converter.The simple structure of system has intelligent protection function, can select power supply as required by user oneself.As can also can directly powering by storage battery power supply by solar cells.In addition, use universal frequency converter and general water pump can also improve the reliability of system works, be convenient to safeguard and produce in batches.The core component of system-MPPT photovoltaic water pump controller 3 possesses the teletransmission data communication interface, can adaptive multiple high performance universal frequency converter (not being subjected to Power Limitation).

Fig. 2 is that the utility model photovoltaic solar water pump system circuit connects schematic representation.Frequency variator terminal 21 connects with the terminal of MPPT photovoltaic water pump controller 3, and the converter power supply both positive and negative polarity connects with the corresponding both positive and negative polarity of water pump controller, and MPPT photovoltaic water pump controller 3 external level sensors 5 are protected to do to beat to do.Solar-energy photo-voltaic cell 1 is through 4 power supplies of universal frequency converter 2 feed water pumps.

Fig. 3 is the utility model MPPT MPPT maximum power point tracking control module I/V working principle plotted curve.MPPT photovoltaic water pump controller 3 is realized MPPT maximum power point tracking, and voltage maintains certain limit, and electric current changes with the Strength Changes of illumination, and the rotating speed of water pump and lift be change thereupon also, realizes that so maximum utilizes solar cell institute electricity.

Because traditional pump technology is very ripe, cost is also very low, it is low that the utility model has a cost with respect to traditional photovoltaic water pump, reliable characteristics flexibly, also can between solar cell and battery (or civil power), mutually switch, need with respect to traditional that efficient is unprecedentedly improved inverter and the battery photovoltaic water pump, be specially adapted to the abundant but lack of water power-shortage area of solar energy. And have characteristics such as non-maintaining, compact, in light weight. The line loads such as air-conditioning that also can be used for photovoltaic power supply. This type control system function is strong, easy to use, is desirable Green Product.

Claims

1. photovoltaic intelligent control variable frequency pump system, comprise solar-energy photo-voltaic cell and water pump, it is characterized in that between described solar-energy photo-voltaic cell and water pump, connecting universal frequency converter the built-in MPPT MPPT maximum power point tracking of the controller part photovoltaic control module of universal frequency converter.

2. photovoltaic intelligent control variable frequency pump according to claim 1 system is characterized in that the external level sensor of described controller is beaten to do protection.