CN210134479U - Photovoltaic multistage multi-pump system for sloping field water supply - Google Patents
Photovoltaic multistage multi-pump system for sloping field water supply Download PDFInfo
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- CN210134479U CN210134479U CN201920783343.8U CN201920783343U CN210134479U CN 210134479 U CN210134479 U CN 210134479U CN 201920783343 U CN201920783343 U CN 201920783343U CN 210134479 U CN210134479 U CN 210134479U
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Abstract
The utility model discloses a multistage many pump systems of photovoltaic that hillside fields supplied water aims at providing the multistage many pump systems of photovoltaic that the hillside fields that the energy consumption is low supplied water. The system comprises a first water pump group, a second water pump group, a third water pump group, a first reservoir, a second reservoir, a third reservoir, a master controller and a photovoltaic power generation system; the master controller is respectively electrically connected with the first water pump group, the second water pump group, the third water pump group and the photovoltaic power generation system; the photovoltaic power generation system is arranged on the upper part of the sloping field; the first reservoir is arranged in a first-stage user area of the sloping field; the first water pump group supplies water to the first-stage user area and the first reservoir through a first pipeline respectively; the second reservoir is arranged in a second-level user area of the sloping field; the second water pump group respectively supplies water to the second-stage user area and the second reservoir through a second pipeline; the third reservoir is arranged in a third-stage user area of the sloping field; and the third water pump group supplies water to the third-stage user area and the third reservoir through a third pipeline respectively.
Description
Technical Field
The utility model belongs to the technical field of the water supply equipment technique and specifically relates to a multistage many pump systems of photovoltaic that supply water on hillside fields is related to.
Background
With the continuous improvement of the living standard of people, the construction of tap water in mountain areas, towns and rural areas becomes a problem to be solved urgently, in recent years, a large number of drinking water supply projects are built by utilizing the existing water resources in the mountain areas and the rural areas, great benefits are brought into play, but some projects are limited due to insufficient water yield of water sources or too large lifting cost due to low terrain, or river water and reservoir water with low terrain and poor water quality are selected as living water supply sources for meeting the requirement of water supply quantity, so that although living water supply in the towns or the rural areas is met, the problems of high operation cost, unsafe water supply systems, single water supply source, great influence of weather conditions and the like exist at the same time.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at overcoming the not enough of prior art existence, provide a multistage multi-pump system of photovoltaic that energy-conserving effectual sloping field supplied water.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
a photovoltaic multistage multi-pump system for water supply of sloping fields is characterized in that the sloping fields are sequentially divided into a first-stage user area, a second-stage user area and a third-stage user area from high altitude to low altitude; the photovoltaic multistage multi-pump system comprises a first water pump group, a second water pump group, a third water pump group, a first reservoir, a second reservoir, a third reservoir, a master controller and a photovoltaic power generation system; the master controller is respectively electrically connected with the first water pump group, the second water pump group, the third water pump group and the photovoltaic power generation system; the photovoltaic power generation system is arranged on the upper part of the sloping field; the first reservoir is arranged in a first-stage user area of the sloping field; the first water pump group supplies water to the first-stage user area and the first reservoir through a first pipeline respectively; the second reservoir is arranged in a second-level user area of the sloping field; the second water pump group respectively supplies water to the second-stage user area and the second reservoir through a second pipeline; the third reservoir is arranged in a third-stage user area of the sloping field; the third water pump group respectively supplies water to a third-stage user area and a third reservoir through a third pipeline; the first water pump set, the second water pump set and the third water pump set are used for taking water from a water source.
Preferably, the water inlet ends of the first water pump group, the second water pump group and the third water pump group are all provided with filter screens.
Preferably, the water inlet ends of the first water pump group, the second water pump group and the third water pump group are provided with rotating fan blades.
Preferably, it further comprises a first one-way valve disposed on the first conduit.
Preferably, it further comprises a second one-way valve disposed on the second conduit.
Preferably, it further comprises a third one-way valve disposed on the third conduit.
Compared with the prior art, the utility model has the advantages of as follows:
the utility model discloses a photovoltaic provides the electric energy, can effectively reduce electric wire netting power consumption, through rational design water supply system, can effectively carry out reasonable water supply to each regional actual water consumption of hillside fields, realizes the rational supply of water.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of the present invention in use, and a part of the structure is omitted.
Fig. 2 is a schematic diagram of a water supply process.
Fig. 3 is a schematic diagram of water supply control.
FIG. 4 is a diagram of the overall controller control strategy.
Fig. 5 is a schematic diagram of the first water pump group, and the second water pump group and the third water pump group have substantially the same structure.
Fig. 6 is a schematic diagram of an automatic power management module.
Fig. 7 is a flowchart of the control method.
Fig. 8 is a schematic diagram of battery operation.
Fig. 9 is a schematic diagram of the predicted power generation amount and the distribution amount of the photovoltaic power generation system.
In the figure: the system comprises a first-level user area 1, a second-level user area 2, a third-level user area 3, a first water pump group 4, a second water pump group 5, a third water pump group 6, a first reservoir 7, a second reservoir 8, a third reservoir 9, a master controller 10, a photovoltaic module 11, a filter screen 12, rotating fan blades 13, a first one-way valve 14, a second one-way valve 15, a third one-way valve 16 and an inversion frequency converter 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention. In the following description, for the sake of clarity of illustrating the structure and operation of the present invention, reference will be made to the accompanying drawings by means of directional terms, but the terms "front", "rear", "left", "right", "up", "down", etc. should be construed as convenient terms and not as limitative terms.
The photovoltaic multistage multi-pump system for water supply on the sloping field as shown in fig. 1-9, wherein the sloping field is sequentially divided into a first-stage user area, a second-stage user area and a third-stage user area from high to low according to the altitude; the photovoltaic multistage multi-pump system comprises a first water pump group, a second water pump group, a third water pump group, a first reservoir, a second reservoir, a third reservoir, a master controller and a photovoltaic power generation system; the master controller is respectively electrically connected with the first water pump group, the second water pump group, the third water pump group and the photovoltaic power generation system; the photovoltaic power generation system is arranged on the upper part of the sloping field; the first reservoir is arranged in a first-stage user area of the sloping field; the first water pump group supplies water to the first-stage user area and the first reservoir through a first pipeline respectively; the second reservoir is arranged in a second-level user area of the sloping field; the second water pump group respectively supplies water to the second-stage user area and the second reservoir through a second pipeline; the third reservoir is arranged in a third-stage user area of the sloping field; the third water pump group respectively supplies water to a third-stage user area and a third reservoir through a third pipeline; the first water pump set, the second water pump set and the third water pump set are used for taking water from a water source.
The water source is river water or underground water generally, and it has more impurity, when drawing through the water pump, install the filter screen additional at the end of drawing water of first water pump group, second water pump group and third water pump group for filter the great solid magazine in aquatic, install rotatory flabellum additional at the filter screen inner of first water pump group, second water pump group and third water pump group simultaneously, drive through rivers for the water pump draws water the in-process and smashes weeds or algae etc. that the filter screen is not in time filterable, prevent the inside jam that the water pump long-time operation leads to.
In order to further optimize the technical scheme in the embodiment, the pipeline device further comprises a first one-way valve arranged on the first pipeline, a second one-way valve arranged on the second pipeline and a third one-way valve arranged on the third pipeline. The check valve can also be replaced by a check valve, so that water is prevented from flowing back through the stopped water pump set.
To further optimize the technical solution in the embodiment, in order to eliminate the effect of water hammer effect, a buffering check valve, a controllable slow-closing check valve or a slow-closing butterfly valve (not shown in the figure) may be disposed at the water outlets of the first water pump group, the second water pump group and the third water pump group, but when the valves are operated, a certain amount of water flows backwards, the pump station is provided with an overflow pipe, and a water hammer eliminator ((not shown in the figure) is disposed immediately next to the check valve and downstream thereof).
In this embodiment, the photovoltaic power generation system adopts the prior art, and some components are introduced as follows:
(1) the control chip in the master controller adopts an ARM or DSP chip, wherein an STM32 series single chip microcomputer based on ARM can be used, or a 51 series single chip microcomputer can be used.
(2) The MPPT control is mainly based on a DC/DC conversion circuit, and the output of the photovoltaic module and the output of the array are subjected to voltage boosting, voltage reducing and direct connection through a control strategy and a control algorithm which are set in a master controller, so that the output of the photovoltaic module and the output of the array are maximized. The control strategy can be constant voltage control, disturbance observation control, vector control, neural network control, fuzzy control and the like, the DC/DC circuit can be a Boost circuit, a Buck circuit, a Boost-Buck circuit, a forward circuit, a flyback circuit and the like, the storage battery charging and discharging circuit can be a bidirectional DC circuit with the model of PowerNex-DC of Shanghai Dazhou information technology Limited, and the MPPT control strategy in the master controller performs Buck-Boost control on the storage battery, or the MPPT control of the storage battery charged by the photovoltaic array can be realized through an MPP20 series controller of Shenzhen Auricularia technology Limited or an MCV series controller of Shenzhen vibroseis electric Limited.
(3) The power supply automatic management module comprises a multi-power supply automatic switching controller, a voltage reduction and stabilization circuit and a multi-stage voltage division circuit. The automatic power switching controller may be an automatic power failure switching module YX850, an automatic direct current switching module YX851, or the like. The voltage stabilizing module can be an LTC3780 automatic voltage boosting and stabilizing module of SanErYIGo, or a BT900W automatic voltage boosting and stabilizing module of ailavi, or a high-power voltage boosting constant current module series of SKDZ.
(4) The inverter and frequency modulation device can be a frequency conversion inverter, such as an SB200 series high-performance universal frequency converter expected by Senno Law technology, Inc., or a high-voltage frequency converter series special for a water supply pump expected by Senno Law technology, Inc., or a special frequency converter for a general-purpose technology PI9000-S series photovoltaic water pump of Chengdu Xingchuan technology, Inc., or a WT1000 intelligent water supply special controller added behind the frequency converter.
(5) The alternating-current water pump can be a ZYP series water pump of Yunnan android energy limited company, a Honor100 series soft starter of hope Senlan technology limited company can be additionally arranged, the water hammer phenomenon of the pump is relieved when the alternating-current water pump stops by utilizing the soft parking function, and the system maintenance cost is saved.
(6) The photovoltaic module can be a monocrystalline silicon module, a polycrystalline silicon module, a high-voltage low-current module and the like.
(7) The storage battery can be a colloid storage battery, or a lead-acid storage battery, or a lithium iron phosphate storage battery, or a ternary lithium battery and the like.
(8) The charge and discharge protection module can be a charge and discharge detection and protection circuit, or a storage battery anti-overcharge controller YX-812-B and the like.
The control modules are all controlled by a controller in the master controller.
In mountain areas, the higher the mountain areas, the smaller the lodging area and the cultivated land area, and the smaller the water demand. The water demand of each grade of sloping field can be calculated according to population of residents, cultivated land area, livestock species and quantity and the like. And the daily water pump water lift is calculated by the photovoltaic daily generated energy production capacity according to a photovoltaic generated energy prediction method, so that the water lift required by each grade of sloping field is distributed.
The first water pump group, the second water pump group and the third water pump group have different lifts which are respectively h, 2h and 3h, the rated power of the three water pump groups is different from the rated flow, the rated flow of the second water pump group is 50-60% of the rated flow of the first water pump group, the rated flow of the third water pump group is 50-60% of the rated flow of the second water pump group, and the rated power of each water pump group is obtained through calculation according to the lifts.
The output power of a photovoltaic assembly in the photovoltaic power generation system is matched with the total power of the first water pump group, and the maximum power of the photovoltaic power generation system under the standard condition is 1.3-1.7 times of the total rated power of the first water pump group.
Each water pump set is formed by connecting a plurality of water pumps in parallel, wherein the rated power and the rated flow of each sub-water pump are completely the same as and matched with the designed lift, and each water pump can independently operate to form the water pump set together.
As a preferred embodiment, when designing a photovoltaic multistage multi-pump system, selecting a photovoltaic module matched with the power of a first water pump group, simultaneously selecting a second water pump group with the flow rate of 50% -60% of that of the first water pump group, selecting a third water pump group with the flow rate of 50% -60% of that of the second water pump group, and simultaneously connecting the first water pump group, the second water pump group and the third water pump group in parallel to form a water pump group module, wherein at the moment, a starting light intensity threshold f3 of the third water pump group is 26% -30% of a working frequency threshold f2 of the second water pump group, a starting light intensity threshold f2 of the second water pump group is 26% -30% of a working frequency threshold f1 of the first water pump group, and a storage battery charging circuit is started when the starting power of the third water pump group is lower than that of the first water pump group, and solar energy with low radiation illumination is fully.
The master controller can detect signals such as power and running state of each stage of pump set, add handshaking signals between two adjacent stages of pump sets, judge whether to switch between the pump sets according to the running state of the pump set and the detected power value, and perform maximum power point tracking and frequency adjustment on photovoltaic output power according to the running state of each pump set.
The master controller supplies power through the automatic power management module, the automatic power management module comprises an intelligent multi-power-supply automatic switching controller and a voltage stabilizing circuit, the voltage stabilizing circuit and a DC/DC circuit in the MPPT module are connected with the positive electrode and the negative electrode of the output end of the photovoltaic array in parallel, the voltage stabilizing circuit is connected with the main power supply input end of the intelligent multi-power-supply automatic switching controller, the standby power supply input end of the intelligent multi-power-supply automatic switching controller is connected with the positive electrode and the negative electrode of a storage battery, the output end of the intelligent multi-power-supply automatic switching controller is connected with a multi-stage voltage dividing circuit and used for supplying power for each driving circuit, when irradiance is sufficient, the photovoltaic module is preferentially used for inputting electric energy to supply power to the master controller, and when irradiance.
The utility model discloses a starting mode adopts and starts step by step, is about to pump package and switches to the great one-level pump package of power step by step, carries out start control, specifically as follows:
and collecting the output voltage and current value of the photovoltaic module, and judging the output power of the photovoltaic module.
When the photovoltaic module is detected to have output power, whether the starting working power of the third water pump group is reached is judged, namely the working threshold value f3, if the starting working power of the third water pump group is reached, the third water pump group starts water supply, otherwise, whether the charging power of the storage battery is reached is judged, if the judgment result is yes, the storage battery is charged, if the judgment result is not, the power input is stopped, the output voltage and the current value of the photovoltaic module are continuously collected, and the output power of the photovoltaic module is judged.
When the output power of the photovoltaic module is judged to be larger than the rated power of the third water pump group when the photovoltaic module operates, the third water pump group is closed, and the second water pump group is switched to be started;
when the output power of the photovoltaic module is judged to be larger than the rated power of the second water pump group when the photovoltaic module operates, the second water pump group is closed, and the first water pump group is switched to be started;
the utility model discloses a stop mode adopts and stops step by step, is about to pump package step by step to the less one-level pump package of power and switches, carries out shutdown control, specifically as follows:
and collecting the output voltage and current value of the photovoltaic module, and judging the output power of the photovoltaic module.
And when the detected output power of the photovoltaic module is judged to be less than the working threshold value f1 of the first water pump group, closing the first water pump group, and switching to start the second water pump group.
And when the detected output power of the photovoltaic module is judged to be smaller than the working threshold value f2 of the second water pump group, closing the second water pump group, and switching to start the third water pump group.
And when the detected output power of the photovoltaic module is judged to be smaller than the working threshold value f3 of the third water pump group, the third water pump group is closed, and the storage battery is charged.
And when the detected output power of the photovoltaic module is smaller than the charging power of the storage battery, stopping power input, continuously collecting the output voltage and the current value of the photovoltaic module, and judging the output power of the photovoltaic module.
During the operation of the photovoltaic multi-stage multi-pump system, classified supply is carried out according to the demands of residents, cultivated land and livestock on mountainous regions, water is directly supplied to the residents, the cultivated land and the pastoral area by adopting a pumping-and-playing priority principle, the photovoltaic multi-stage multi-pump system is switched to water delivery to the impounding reservoir after sufficient water supply is carried out in the water-requiring area, and water resources are stored in the impounding reservoir for scheduling and adjusting the insufficient illumination period. In the energy distribution of the multi-stage multi-pump system, a lower-power lower-lift level pump set, namely, a third water pump set, has the highest priority level, and a higher-lift level pump set, namely, a second water pump set, a first water pump set, and the like, has the priority level reduced step by step. Under the condition of sufficient irradiance, starting a third water pump group, and then sequentially switching upwards step by step and starting other pump groups until the topmost pump group (a first water pump group) is completely started; and when the irradiance is insufficient, closing the first water pump set, sequentially switching downwards step by step and starting other pump sets until all the pump sets completely stop, and switching to a storage battery for charging.
In the operation process of the multi-stage multi-pump system group, when the irradiation intensity is enhanced and the output power of the photovoltaic module is increased, if the high-power pump group is switched, the corresponding high-power pump group quickly carries out MPPT response and quickly adjusts the current pump group; meanwhile, when the irradiation intensity is reduced and the output power of the photovoltaic module is reduced, if the small-power pump set is switched, the corresponding small-power pump set quickly carries out MPPT response, and quickly adjusts the current pump set, so that the phenomenon that the pump set is suddenly stopped due to insufficient input in the switching process is avoided, and the stability of the system is improved.
When irradiance change caused by external factors such as cloud cover passing, tree shadow, birds and the like occurs in the operation process of the photovoltaic multi-stage multi-pump system, the photovoltaic input power is unstable, the power change is small, the operating threshold value is not touched, the adjacent-stage pump group is not required to be adjusted, and sub-pumps in the pump group are connected in parallel to adjust the power and are used for absorbing power fluctuation caused by irradiation change.
When the input power of the photovoltaic module is below the working threshold of the third water pump set, the input power directly charges the storage battery, the charging protection device is used in the process that the photovoltaic module transmits electric energy to the storage battery, when the voltage of the storage battery is detected to be full-electricity voltage, the storage battery is automatically stopped to be charged, and when the voltage of the storage battery is detected to be lower than the full-electricity voltage, the storage battery can be normally charged; meanwhile, when the storage battery performs functions on each stage of water pump set, when the voltage of the storage battery is detected to be lower than the preset voltage, the external discharge is stopped, so that the running safety of the storage battery is ensured.
The master controller controls the running and switching of the state to include stable delay setting. When the water pump group is switched, the safe operation of the water pump is ensured by stable time delay setting, and the frequent switching between two water pump groups is avoided, so that the service life of the water pump is short.
The master controller also comprises a protection module which is connected with the input of the photovoltaic module and the input of the storage battery, and is switched to the storage battery for supplying power under the conditions of external light intensity, system faults, frequent power conversion and the like, so as to protect the system.
The control strategy in the master controller comprises a water consumption and power prediction strategy, the daily power generation power and power generation amount are predicted through power prediction based on weather forecast or other photovoltaic power prediction strategies, and meanwhile, the water pumping amount and water demand of each stage of different working valve systems are calculated; meanwhile, the daily necessary water demand of each level is determined according to the national and regional water use standards of users, cultivated land area, livestock types and quantity of each level of the sloping field, and then the elastic water demand of each level of the region is predicted through load prediction; meanwhile, the water pumping proportion and the water storage proportion between all levels of the system are adjusted through photovoltaic and water pumping prediction and water demand prediction of all levels of the system.
When the water pump is suddenly powered off and the valve is closed, the switching module in the master controller also needs to utilize the storage battery to output, adjust and control the power of the water pump set to slowly change, and control the water flow to slowly decrease, so that the damage of the water flow inertia to the pipeline and the system is avoided.
And a sewage discharge pipeline is arranged at the lowest part of the reservoir and is controlled by a valve, and the valve is opened for treatment when the reservoir needs to be cleaned and discharged.
The master controller comprises MPPT control, which is realized by a DC-DC buck-boost circuit and can be constant voltage control, disturbance observation control, vector control, neural network control, fuzzy control and the like.
The control inversion module provides electric energy for the water pump through control modulation, if the direct current water pump is adopted, the inversion function of the control inversion module does not need to operate, and the control inversion module can directly provide electric energy for the direct current water pump set.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A photovoltaic multistage multi-pump system for water supply of sloping fields is characterized in that the sloping fields are sequentially divided into a first-stage user area, a second-stage user area and a third-stage user area from high altitude to low altitude; the photovoltaic multistage multi-pump system comprises a first water pump group, a second water pump group, a third water pump group, a first reservoir, a second reservoir, a third reservoir, a master controller and a photovoltaic power generation system; the method is characterized in that: the master controller is respectively electrically connected with the first water pump group, the second water pump group, the third water pump group and the photovoltaic power generation system; the photovoltaic power generation system is arranged on the upper part of the sloping field; the first reservoir is arranged in a first-stage user area of the sloping field; the first water pump group supplies water to the first-stage user area and the first reservoir through a first pipeline respectively; the second reservoir is arranged in a second-level user area of the sloping field; the second water pump group respectively supplies water to the second-stage user area and the second reservoir through a second pipeline; the third reservoir is arranged in a third-stage user area of the sloping field; the third water pump group respectively supplies water to a third-stage user area and a third reservoir through a third pipeline; the first water pump set, the second water pump set and the third water pump set are used for taking water from a water source.
2. The photovoltaic multistage multi-pump system for sloping field water supply according to claim 1, characterized in that: and filter screens are arranged at the water inlet ends of the first water pump group, the second water pump group and the third water pump group.
3. The photovoltaic multistage multi-pump system for sloping field water supply according to claim 1 or 2, characterized in that: and the water inlet ends of the first water pump group, the second water pump group and the third water pump group are provided with rotating fan blades.
4. The photovoltaic multistage multi-pump system for sloping field water supply according to claim 1 or 2, characterized in that: it still includes the first check valve who sets up on first pipeline.
5. The photovoltaic multistage multi-pump system for sloping field water supply according to claim 1 or 2, characterized in that: it also includes a second one-way valve disposed on the second conduit.
6. The photovoltaic multistage multi-pump system for sloping field water supply according to claim 1 or 2, characterized in that: it also includes a third one-way valve disposed on the third conduit.
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| CN201920783343.8U CN210134479U (en) | 2019-05-28 | 2019-05-28 | Photovoltaic multistage multi-pump system for sloping field water supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056044A (en) * | 2019-05-28 | 2019-07-26 | 云南师范大学 | A kind of the photovoltaic multistage multiple pump and its control method of hillside fields water supply |
| CN112360731A (en) * | 2020-10-10 | 2021-02-12 | 深圳第三代半导体研究院 | Multi-machine parallel photovoltaic equipment control system and optimization method |
-
2019
- 2019-05-28 CN CN201920783343.8U patent/CN210134479U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056044A (en) * | 2019-05-28 | 2019-07-26 | 云南师范大学 | A kind of the photovoltaic multistage multiple pump and its control method of hillside fields water supply |
| CN112360731A (en) * | 2020-10-10 | 2021-02-12 | 深圳第三代半导体研究院 | Multi-machine parallel photovoltaic equipment control system and optimization method |
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