CN109595178A - Photovoltaic water pump system water hammer-resistant control method - Google Patents
Photovoltaic water pump system water hammer-resistant control method Download PDFInfo
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- CN109595178A CN109595178A CN201811516177.1A CN201811516177A CN109595178A CN 109595178 A CN109595178 A CN 109595178A CN 201811516177 A CN201811516177 A CN 201811516177A CN 109595178 A CN109595178 A CN 109595178A
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- Prior art keywords
- module
- battery
- photovoltaic
- pump motor
- current
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/068—Battery powered
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
Photovoltaic water pump system water hammer-resistant control method, it is related to photovoltaic water pump system, especially one kind effectively avoids generating water hammer in photovoltaic water pump system under the conditions of sunshine stroboscopic, while being also avoided that battery reduces the photovoltaic water pump system water hammer-resistant control method in service life because of over-discharge.The present invention is applied to novel photovoltaic pumping plant, the device includes photovoltaic array, DC/DC module, inverter module, pump motor, battery, controller, current meter and hydraulic gage, photovoltaic array, DC/DC module, inverter module and pump motor are linked in sequence by cable, battery is connect with DC/DC module, and controller is connect by data line with DC/DC module, inverter module, current meter and hydraulic gage；Current meter and hydraulic gage are mounted in outlet pipe, and outlet pipe is connect with pump motor.The present invention increases energy storage device on existing photovoltaic water pump system, and supplement sunshine stroboscopic reduces period, photovoltaic array electricity shortage, to ensure that water speed no longer becomes negative value from zero-turn in pipeline, avoids the formation of water hammer effect.
Description
Technical field
The present invention relates to photovoltaic water pump system, especially one kind effectively to avoid photovoltaic water pump system under the conditions of sunshine stroboscopic
Water hammer is generated in system, while being also avoided that battery reduces the photovoltaic water pump system water hammer-resistant control method in service life because of over-discharge.
Background technique
Design has energy storage device in the photovoltaic water pump system of early stage, and whole system includes photovoltaic array, controller, water pump electricity
Machine, battery group and inverter.In such system, pump motor is under rated power when running, and has sunshine on daytime
In the case where, it is that battery supplements beyond part if the real-time output power of photovoltaic array is greater than the operating power of pump motor
Electric energy, if the real-time output power of photovoltaic array is less than the operating power of pump motor, insufficient section is mended by battery
It fills.The design of the system is as traditional mains-supplied, and the pumping station operation time can independently arrange, as long as electric energy energy in battery
Meet power supply, no matter daytime, cloudy day or night, can star pumping station operation；But the battery configured in the system,
It is chronically at frequent deep-cycle electric discharge, causes service life short, considerably increases the operation expense in later period.
And no longer retain accumulator plant in system, whole system is directly by photovoltaic on mainstream photovoltaic water pump system at present
Square matrix, inverter and pump motor are grouped as, and at runtime, if photovoltaic array power meets pump motor operation, inverter is
The direct current of photovoltaic array is converted to the alternating current for meeting pump motor working voltage, directly drives pump motor operation, from
Early to evening, when solar radiation value changes at parabolic, photovoltaic array power also changes therewith, the pump-out of pump motor
Photovoltaic array power real-time change is followed, every morning starting operation stops at dusk；The type water pump is in Africa, the Middle East, China
The Northwest, the dry season in Yunnan are commonplace.
But in the process of running, when there is the frequent flickering of sunshine, pumping plant pipeline opening water yield is quickly reduced, or even is gone out
Existing return water, just will form water hammer effect；Such situation is the most universal in May to the October that Yunnan enters rainy season every year, often
Its cloud layer frequent activity causes the ground total solar radiation amount of photovoltaic array position frequent flickering occur, when sun spoke
The reduction of value moment is penetrated, water speed in pumping plant pipeline is caused water hammer effect occur from when being down to zero.
Water hammer is in unexpected have a power failure, and due to the inertia of pressure flow, inside water pipe, inside pipe wall is smooth, and water flowing is certainly
Such as, rivers shock wave is generated, impact is formed to valve, water pump, tube wall.The power that rivers shock wave generates back and forth, it is very big sometimes,
To damage.Conventional photovoltaic water pump station is in terms of water hammer-resistant, the basic technology for using traditional pump station, such as: installing water additional
It hammers arrester, check-valves, anchor block and thickening tube wall etc. into shape, but virtually increases construction investment, and frequent water hammer is easy
Pipeline weak link, water pump and pipe element are caused to damage, reduced the service life.
Summary of the invention
To be solved by this invention is exactly existing conventional photovoltaic water pump system using batteries to store energy, battery long term frequent
Deep discharge causes service life reduction, and maintenance cost is high, and existing no storage battery photovoltaic water pump system holds under the conditions of sunshine stroboscopic
It is also easy to produce water hammer effect, causes internal damage, the problem of service life the, one kind is provided under the conditions of sunshine stroboscopic, effectively keeps away
Exempt to generate water hammer in photovoltaic water pump system, while being also avoided that battery reduces the photovoltaic water pump system water hammer-resistant in service life because of over-discharge
Control method.
Photovoltaic water pump system water hammer-resistant control method of the invention, it is characterised in that the control method is applied to novel photovoltaic
Pumping plant, the device include photovoltaic array, DC/DC module, inverter module, pump motor, battery, controller, current meter
And hydraulic gage, photovoltaic array, DC/DC module, inverter module and pump motor are linked in sequence by cable, battery and DC/DC
Module connection, controller are connect by data line with DC/DC module, inverter module, current meter and hydraulic gage；Current meter and water
Pressure meter is mounted in outlet pipe, and outlet pipe is connect with pump motor；Specific control mode is as follows:
1) three periods are set in controller, respectively energy section is filled in preparation energy storage section, active section and end, wherein preparing storage
Can section be that photovoltaic array output power from zero is gradually increased to period between pump motor rated operating power, energy is filled in end
Section is that photovoltaic array output power is gradually reduced to from pump motor rated operating power is greater than lower than pump motor nominal operation
Period between power, preparing energy storage section in the period for terminating to fill between energy section is active section；
2) prepare energy storage section: the direct current of photovoltaic array output, by entering battery after DC/DC module, to charge the battery,
When the electric current exported in photovoltaic array is not less than the rated operational current of pump motor, then into active section；
3) active section: the DC power supply of photovoltaic array output is turned by DC/DC module transfer to inverter module by inverter module
Shift to alternating current, driving pump motor work, pumping plant normal pumping；During this, the current meter and hydraulic gage in outlet pipe are real
Monitoring in-pipe flow state is applied, and working condition is exported to control module；
4) in step 3), when decline suddenly occurs in solar radiation, the electric current of photovoltaic array output quickly reduces, pump motor power
Reduce, water flow velocity caused in outlet pipe to reduce, when flow velocity level off to zero when, control module by DC/DC module starting storage battery,
Battery current enters inverter module by DC/DC module, is pump motor supplemental current, and battery current is gradually increased, and protects
Card water outlet velocity in pipes is not less than zero；
5) in step 4), when solar radiation increases, photovoltaic array exports electric current and increases, and battery output electric current is accordingly reduced, directly
Exit workmanship completely to battery；
6) in step 4), when battery continued power reach 0.5 it is small when, control module closes battery and DC/DC module, water pump
Motor power-off stops working；
7) in step 6), sunshine occurs again, when exporting electric current in photovoltaic array, repeats since step 2；
8) terminate to fill energy section: when photovoltaic array output electric current is gradually decrease to lower than pump motor rated operational current, into knot
Beam fills energy section, and the direct current of photovoltaic array output fully enters battery by DC/DC module, to charge the battery.
In the active section, when accumulator electric-quantity deficiency, it is greater than metered flow and if only if water flow in outlet pipe
50%, DC/DC module will exceed the current distributing of pump motor rated operational current to battery, to charge the battery.
Photovoltaic water pump system water hammer-resistant control method of the invention, increases energy storage device on existing photovoltaic water pump system,
When in water lift pipeline water speed from positive value gradually reduce, up to be reduced to zero when, start spare energy storage device electric energy supplement immediately, supplement
Sunshine stroboscopic reduces period, photovoltaic array electricity shortage, to ensure that water speed no longer becomes negative value from zero-turn in pipeline, avoids the formation of
Water hammer effect, and by the powers duration of control battery, the frequent deep discharge situation of battery is effectively prevented, is effectively mentioned
The high working life of battery.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Specific embodiment
Embodiment 1: a kind of photovoltaic water pump system water hammer-resistant control method is applied to novel photovoltaic pumping plant, the device
Including photovoltaic array, DC/DC module, inverter module, pump motor, battery, controller, current meter and hydraulic gage, photovoltaic side
Battle array, DC/DC module, inverter module and pump motor are linked in sequence by cable, and battery is connect with DC/DC module, controller
It is connect by data line with DC/DC module, inverter module, current meter and hydraulic gage；Current meter and hydraulic gage are mounted on water outlet
In pipe, outlet pipe is connect with pump motor；Specific control mode is as follows:
1) three periods are set in controller, respectively energy section is filled in preparation energy storage section, active section and end, wherein preparing storage
Can section be that photovoltaic array output power from zero is gradually increased to period between pump motor rated operating power, energy is filled in end
Section is that photovoltaic array output power is gradually reduced to from pump motor rated operating power is greater than lower than pump motor nominal operation
Period between power, preparing energy storage section in the period for terminating to fill between energy section is active section；
2) prepare energy storage section: the direct current of photovoltaic array output, by entering battery after DC/DC module, to charge the battery,
When the electric current exported in photovoltaic array is not less than the rated operational current of pump motor, then into active section；
3) active section: the DC power supply of photovoltaic array output is turned by DC/DC module transfer to inverter module by inverter module
Shift to alternating current, driving pump motor work, pumping plant normal pumping；During this, the current meter and hydraulic gage in outlet pipe are real
Monitoring in-pipe flow state is applied, and working condition is exported to control module；
4) in step 3), when decline suddenly occurs in solar radiation, the electric current of photovoltaic array output quickly reduces, pump motor power
Reduce, water flow velocity caused in outlet pipe to reduce, when flow velocity level off to zero when, control module by DC/DC module starting storage battery,
Battery current enters inverter module by DC/DC module, is pump motor supplemental current, and battery current is gradually increased, and protects
Card water outlet velocity in pipes is not less than zero；
5) in step 4), when solar radiation increases, photovoltaic array exports electric current and increases, and battery output electric current is accordingly reduced, directly
Exit workmanship completely to battery；
6) in step 4), when battery continued power reach 0.5 it is small when, control module closes battery and DC/DC module, water pump
Motor power-off stops working；
7) in step 6), sunshine occurs again, when exporting electric current in photovoltaic array, repeats since step 2；
8) terminate to fill energy section: when photovoltaic array output electric current is gradually decrease to lower than pump motor rated operational current, into knot
Beam fills energy section, and the direct current of photovoltaic array output fully enters battery by DC/DC module, to charge the battery.
In active section, when accumulator electric-quantity deficiency, it is greater than metered flow and if only if water flow in outlet pipe
50%, DC/DC module will exceed the current distributing of pump motor rated operational current to battery, to charge the battery.
Claims (2)
1. a kind of photovoltaic water pump system water hammer-resistant control method, it is characterised in that the control method is filled applied to novel photovoltaic water pump
It sets, which includes photovoltaic array, DC/DC module, inverter module, pump motor, battery, controller, current meter and hydraulic pressure
Meter, photovoltaic array, DC/DC module, inverter module and pump motor are linked in sequence by cable, and battery and DC/DC module connect
It connects, controller is connect by data line with DC/DC module, inverter module, current meter and hydraulic gage；Current meter and hydraulic gage peace
In outlet pipe, outlet pipe is connect with pump motor；Specific control mode is as follows:
1) three periods are set in controller, respectively energy section is filled in preparation energy storage section, active section and end, wherein preparing storage
Can section be that photovoltaic array output power from zero is gradually increased to period between pump motor rated operating power, energy is filled in end
Section is that photovoltaic array output power is gradually reduced to from pump motor rated operating power is greater than lower than pump motor nominal operation
Period between power, preparing energy storage section in the period for terminating to fill between energy section is active section；
2) prepare energy storage section: the direct current of photovoltaic array output, by entering battery after DC/DC module, to charge the battery,
When the electric current exported in photovoltaic array is not less than the rated operational current of pump motor, then into active section；
3) active section: the DC power supply of photovoltaic array output is turned by DC/DC module transfer to inverter module by inverter module
Shift to alternating current, driving pump motor work, pumping plant normal pumping；During this, the current meter and hydraulic gage in outlet pipe are real
Monitoring in-pipe flow state is applied, and working condition is exported to control module；
4) in step 3), when decline suddenly occurs in solar radiation, the electric current of photovoltaic array output quickly reduces, pump motor power
Reduce, water flow velocity caused in outlet pipe to reduce, when flow velocity level off to zero when, control module by DC/DC module starting storage battery,
Battery current enters inverter module by DC/DC module, is pump motor supplemental current, and battery current is gradually increased, and protects
Card water outlet velocity in pipes is not less than zero；
5) in step 4), when solar radiation increases, photovoltaic array exports electric current and increases, and battery output electric current is accordingly reduced, directly
Exit workmanship completely to battery；
6) in step 4), when battery continued power reach 0.5 it is small when, control module closes battery and DC/DC module, water pump
Motor power-off stops working；
7) in step 6), sunshine occurs again, when exporting electric current in photovoltaic array, repeats since step 2；
8) terminate to fill energy section: when photovoltaic array output electric current is gradually decrease to lower than pump motor rated operational current, into knot
Beam fills energy section, and the direct current of photovoltaic array output fully enters battery by DC/DC module, to charge the battery.
2. photovoltaic water pump system water hammer-resistant control method as described in claim 1, it is characterised in that in the active section, when
Accumulator electric-quantity is insufficient, will exceed water pump and if only if 50%, the DC/DC module that water flow in outlet pipe is greater than metered flow
The current distributing of Rated motor operating current is to battery, to charge the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811516177.1A CN109595178A (en) | 2018-12-12 | 2018-12-12 | Photovoltaic water pump system water hammer-resistant control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811516177.1A CN109595178A (en) | 2018-12-12 | 2018-12-12 | Photovoltaic water pump system water hammer-resistant control method |
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| Publication Number | Publication Date |
|---|---|
| CN109595178A true CN109595178A (en) | 2019-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811516177.1A Withdrawn CN109595178A (en) | 2018-12-12 | 2018-12-12 | Photovoltaic water pump system water hammer-resistant control method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109595178A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3831142A1 (en) * | 1987-09-18 | 1989-04-06 | Grundfos Int | Solar pump system |
| CN1793639A (en) * | 2004-10-08 | 2006-06-28 | 小松赛诺尔株式会社 | Battery, engine starting device, engine starting device and portable operation machine |
| CN201858104U (en) * | 2010-09-30 | 2011-06-08 | 泉州市英德光电科技有限公司 | Solar water suction pump |
| CN204746728U (en) * | 2015-07-20 | 2015-11-11 | 郭亚华 | Solar energy fountain |
| CN205841170U (en) * | 2016-07-25 | 2016-12-28 | 浙江天赐新能源科技有限公司 | The constant pressure water supply controller of Driven by Solar Energy |
-
2018
- 2018-12-12 CN CN201811516177.1A patent/CN109595178A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3831142A1 (en) * | 1987-09-18 | 1989-04-06 | Grundfos Int | Solar pump system |
| CN1793639A (en) * | 2004-10-08 | 2006-06-28 | 小松赛诺尔株式会社 | Battery, engine starting device, engine starting device and portable operation machine |
| CN201858104U (en) * | 2010-09-30 | 2011-06-08 | 泉州市英德光电科技有限公司 | Solar water suction pump |
| CN204746728U (en) * | 2015-07-20 | 2015-11-11 | 郭亚华 | Solar energy fountain |
| CN205841170U (en) * | 2016-07-25 | 2016-12-28 | 浙江天赐新能源科技有限公司 | The constant pressure water supply controller of Driven by Solar Energy |
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Application publication date: 20190409 |
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| WW01 | Invention patent application withdrawn after publication |