CN109058121B - Main machine fault and disconnection control method and utilization rate method of light Fu Zhineng centralized control water lifting system based on MPPT algorithm - Google Patents
Main machine fault and disconnection control method and utilization rate method of light Fu Zhineng centralized control water lifting system based on MPPT algorithm Download PDFInfo
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- CN109058121B CN109058121B CN201811006249.8A CN201811006249A CN109058121B CN 109058121 B CN109058121 B CN 109058121B CN 201811006249 A CN201811006249 A CN 201811006249A CN 109058121 B CN109058121 B CN 109058121B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 160
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004891 communication Methods 0.000 claims description 25
- 230000006855 networking Effects 0.000 claims description 18
- 238000005086 pumping Methods 0.000 claims description 9
- 238000012163 sequencing technique Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000003809 water extraction Methods 0.000 abstract description 3
- 238000005286 illumination Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- 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
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- 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
- F04D13/12—Combinations of two or more pumps
- F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
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- 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
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- 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
- F04D15/0088—Testing machines
Abstract
The invention discloses an MPPT algorithm-based light Fu Zhineng centralized control water lifting system, and a host fault control method, a host disconnection control method and a method for improving water lifting efficiency based on the system, wherein the MPPT algorithm-based light Fu Zhineng centralized control water lifting system comprises the following components: the photovoltaic array is respectively connected with the drivers, the drivers comprise a driver host and at least one driver slave, and each driver is respectively connected with at least one water pump; the photovoltaic intelligent centralized control module is used for detecting the running condition of a driver, and when the photovoltaic intelligent centralized control module detects that a driver host fails or breaks circuit, the driver host commands the next driver slave connected with the driver host to be automatically switched into a new driver host. The invention maximizes the energy generated by the photovoltaic array and effectively improves the water extraction quantity.
Description
Technical Field
The invention relates to the technical field of photovoltaic water pumping, in particular to a method for controlling host faults and disconnection of a light Fu Zhineng centralized control water pumping system based on an MPPT algorithm and a method for utilizing the host faults and disconnection.
Background
In the case of large water usage and no grid, a single large frequency photovoltaic water lift system or a plurality of independent small frequency photovoltaic water lift systems are generally adopted. The energy generated by the photovoltaic array under sunlight is transmitted to the water pump through the photovoltaic water pump driver, so that the purpose of water lifting is achieved. When a plurality of centrifugal water pumps commonly used work simultaneously under the condition of low illumination, the efficiency of a single water pump is very low, water can not be discharged even sometimes because of a lift, the energy generated by a photovoltaic array is greatly wasted, and the water lifting amount of a photovoltaic water lifting system is directly influenced. In this situation, there is an urgent need for a system and method for maximizing the energy generated by using a photovoltaic array.
Accordingly, the prior art has drawbacks and needs improvement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a host fault and disconnection control method and a utilization rate method of an optical Fu Zhineng centralized control water lifting system based on an MPPT algorithm.
The technical scheme of the invention is as follows: light Fu Zhineng centralized control water lifting system based on MPPT algorithm includes: the photovoltaic array is respectively connected with the drivers, the drivers comprise a driver host and at least one driver slave, and each driver is respectively connected with at least one water pump;
the driver includes: the system comprises a micro-control module, a motor driving module, an inversion module, a current and voltage detection module, an MPPT module, a photovoltaic intelligent centralized control module and a communication module, wherein the micro-control module is respectively and electrically connected with the motor driving module, the inversion module, the MPPT module, the photovoltaic intelligent centralized control module and the communication module, and the motor driving module is also connected with a water pump through the inversion module; the drivers are in communication connection through a communication module, and the driver host controls the driver slave to be started or closed through the communication module; the photovoltaic intelligent centralized control module is used for detecting the running condition of a driver, and when the photovoltaic intelligent centralized control module detects that a driver host fails or breaks circuit, the driver host commands the next driver slave connected with the driver host to be automatically switched into a new driver host.
Further, the driver further comprises a direct current input module, wherein the output end of the direct current input module is connected with the inversion module, and the input end of the direct current input module is connected with the photovoltaic array.
Further, the micro control module is a DSP digital processing chip, and the model is TMS320F28034.
Further, the driver further comprises a pumping and water diffusion protection module, and the pumping and water diffusion protection module is electrically connected with the micro-control module.
The invention also provides a host fault control method of the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm, which comprises the following steps:
s101, numbering and sequencing a driver host and a driver slave respectively in a networking circulation list, and searching an address of a station of the next driver slave arranged behind the driver host in the networking circulation list by the driver host after the driver host fails;
s102, the driver host judges whether the site address is the address of the driver host, when the site address is the local address, the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm does not switch the driver host, and when the site address is not the local driver address, the driver host sends a host switching instruction to the next driver slave;
and S103, after the driver slave receives the instruction, judging whether to confirm switching to a new host, and after the driver slave confirms switching, replying the driver slave to the driver host, wherein the driver slave becomes the new driver host, and after the driver slave refuses switching, repeating the step S101, and searching the site address of the next driver slave of the driver slave.
The invention also provides a host disconnection control method of the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm, which is characterized by comprising the following steps:
s201, the driver slave counts the time interval between data sent by the driver host;
s202, the driver host judges whether the time interval exceeds the time interval of the local code, when the time interval does not exceed, the driver slave clears the count of the time interval of the data sent by the driver host, and when the time interval exceeds, the driver slave judges whether the driver slave has faults or not;
and S203, when the driver slave has no fault, the driver slave controls the local machine to be switched into the driver slave, and when the driver slave has the fault, the driver slave is not switched.
The invention also provides a method for improving the utilization rate of the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm, which is characterized by comprising the following steps:
s301, a driver host acquires the output frequency of a photovoltaic array, and adjusts the output frequency of a water pump connected with the driver host according to an MPPT algorithm;
s302, the driver host judges whether the output frequency obtained through the MPPT algorithm is equal to the rated output frequency of the water pump, so that the driver slave is turned on or off successively.
Further, the method for sequentially starting the driver slaves in the step S302 includes the following steps:
sa3021, numbering and sequencing a driver host and a driver slave respectively in a networking circulation list, wherein the driver host judges whether the output frequency obtained through an MPPT algorithm is equal to the rated output frequency of a water pump, when the output frequency of the water pump is smaller than the rated frequency of the water pump, the driver host clears the time count of the next driver slave in the networking circulation list, the driver host continues to monitor the output frequency, and when the output frequency of the water pump is equal to the rated frequency of the water pump, the driver host starts to count the time of the next driver slave station;
sa3022, judging whether the output frequency of the water pump connected with the drive host reaches the rated frequency of the water pump in the set counting time, when the output frequency of the water pump does not reach the rated frequency of the water pump in the set counting time, the drive host continuously monitors the output frequency, when the output frequency of the water pump reaches the rated frequency of the water pump in the set counting time, the drive host reads the number of the next slave in the circulation list;
sa3023, judging whether the number is the local number, when the number is the local number, indicating that all water pumps are started, and when the number is not the local number, the driver host sends a start command to the driver slave represented by the number;
the Sa3021, the drive master cycles through step S301, and sequentially turns on the next drive slave.
Further, the method for sequentially turning off the driver slaves in step S302 includes the following steps:
sb3021, numbering and sequencing a driver host and a driver slave respectively in a networking circulation list, wherein the driver host judges whether the output frequency obtained through an MPPT algorithm is equal to the lowest running output frequency of a water pump, when the output frequency of the water pump is greater than the lowest running frequency of the water pump, the driver host clears the time count of the next driver slave in the networking circulation list, the driver host continues to monitor the output frequency, and when the output frequency of the water pump is equal to the lowest running frequency of the water pump, the driver host closes the time count of the next driver slave station;
sb3022, judging whether the output frequency of the water pump connected with the drive host reaches the lowest running frequency of the water pump in the set counting time, when the output frequency of the water pump does not reach the lowest running frequency of the water pump in the set counting time, the drive host continuously monitors the output frequency, when the output frequency of the water pump reaches the lowest running frequency of the water pump in the set counting time, the drive host reversely reads the number of the next slave in the circulation list;
sb3023 for judging whether the number is a local number, when the number is the local number, indicating that only the water pump connected with the driver host operates, and when the number is not the local number, the driver host sends a closing command to the driver slave represented by the number;
sb3021, the drive master cycles through step S301, successively turning off the next drive slave.
By adopting the scheme, a plurality of low-power photovoltaic water pumps are connected in parallel to lift water under the same photovoltaic array, and the drivers in the system are communicated through serial ports. One of the drivers is used as a master to control and the other is used as a slave. Through the intelligent algorithm, the next site can be automatically switched to serve as the host under the condition that the host fails or breaks lines, and the normal operation of the water lifting system is ensured.
In the case of sunlight, the drive host is started first, and the output frequency of the drive host is adjusted according to the MPPT algorithm. When the energy of the photovoltaic array is sufficient to support the operation of the master to the rated frequency of the water pump, the driver slave 1 is turned on. And so on, when the illumination is sufficient, all the driver slaves can be started. When the sunlight is weakened, the output frequency of the drive host machine can be reduced according to the MPPT algorithm, when the minimum frequency required by the lift is reached, one slave machine is stopped, and the like, and only one machine of the host machine operates under the condition of insufficient sunlight. The slave machine operates according to the rated frequency of the water pump, and meanwhile, the master machine always adjusts the output frequency through the MPPT algorithm, so that the energy generated by the photovoltaic array is utilized to the maximum extent. The water pump can work at a higher rotating speed under the condition of weak illumination, the energy and the water pump efficiency generated by the photovoltaic array are fully utilized, and the water extraction quantity is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an MPPT algorithm-based light Fu Zhineng centralized control water lifting system;
FIG. 2 is a flow chart of a method for controlling a host fault of an optical Fu Zhineng centralized control water lifting system based on an MPPT algorithm;
FIG. 3 is a flowchart of a method for controlling a host disconnection of an optical Fu Zhineng centralized control water lifting system based on an MPPT algorithm;
fig. 4 is a flowchart of a master start slave of the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm;
fig. 5 is a flowchart of a master shutdown slave of the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The invention will be described in detail below with reference to the drawings and the specific embodiments.
The invention provides an MPPT algorithm-based light Fu Zhineng centralized control water lifting system, which comprises: the photovoltaic array is respectively connected with the drivers, the drivers comprise a driver host and at least one driver slave, and each driver is respectively connected with at least one water pump;
the driver includes: the system comprises a micro-control module, a motor driving module, an inversion module, a current and voltage detection module, an MPPT module, a photovoltaic intelligent centralized control module and a communication module, wherein the micro-control module is respectively and electrically connected with the motor driving module, the inversion module, the MPPT module, the photovoltaic intelligent centralized control module and the communication module, and the motor driving module is also connected with a water pump through the inversion module; the drivers are in communication connection through a communication module, and the driver host controls the driver slave to be started or closed through the communication module; the photovoltaic intelligent centralized control module is used for detecting the running condition of a driver, and when the photovoltaic intelligent centralized control module detects that a driver host fails or breaks circuit, the driver host commands the next driver slave connected with the driver host to be automatically switched into a new driver host.
The driver also comprises a direct current input module, wherein the output end of the direct current input module is connected with the inversion module, and the input end of the direct current input module is connected with the photovoltaic array.
The micro control module is a DSP digital processing chip, and the model is TMS320F28034.
The driver also comprises a pumping and water diffusion protection module, and the pumping and water diffusion protection module is electrically connected with the micro-control module.
The invention also provides a host fault control method of the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm, which comprises the following steps:
s101, numbering and sequencing a driver host and a driver slave respectively in a networking circulation list, and searching an address of a station of the next driver slave arranged behind the driver host in the networking circulation list by the driver host after the driver host fails;
s102, the driver host judges whether the site address is the address of the driver host, when the site address is the local address, the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm does not switch the driver host, and when the site address is not the local driver address, the driver host sends a host switching instruction to the next driver slave;
and S103, after the driver slave receives the instruction, judging whether to confirm switching to a new host, and after the driver slave confirms switching, replying the driver slave to the driver host, wherein the driver slave becomes the new driver host, and after the driver slave refuses switching, repeating the step S101, and searching the site address of the next driver slave of the driver slave.
The invention also provides a host disconnection control method of the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm, which is characterized by comprising the following steps:
s201, the driver slave counts the time interval between data sent by the driver host;
s202, the driver host judges whether the time interval exceeds the time interval of the local code, when the time interval does not exceed, the driver slave clears the count of the time interval of the data sent by the driver host, and when the time interval exceeds, the driver slave judges whether the driver slave has faults or not;
and S203, when the driver slave has no fault, the driver slave controls the local machine to be switched into the driver slave, and when the driver slave has the fault, the driver slave is not switched.
The invention also provides a method for improving the utilization rate of the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm, which is characterized by comprising the following steps:
s301, a driver host acquires the output frequency of a photovoltaic array, and adjusts the output frequency of a water pump connected with the driver host according to an MPPT algorithm;
s302, the driver host judges whether the output frequency obtained through the MPPT algorithm is equal to the rated output frequency of the water pump, so that the driver slave is turned on or off successively.
The method for sequentially starting the driver slaves in step S302 includes the following steps:
sa3021, numbering and sequencing a driver host and a driver slave respectively in a networking circulation list, wherein the driver host judges whether the output frequency obtained through an MPPT algorithm is equal to the rated output frequency of a water pump, when the output frequency of the water pump is smaller than the rated frequency of the water pump, the driver host clears the time count of the next driver slave in the networking circulation list, the driver host continues to monitor the output frequency, and when the output frequency of the water pump is equal to the rated frequency of the water pump, the driver host starts to count the time of the next driver slave station;
sa3022, judging whether the output frequency of the water pump connected with the drive host reaches the rated frequency of the water pump in the set counting time, when the output frequency of the water pump does not reach the rated frequency of the water pump in the set counting time, the drive host continuously monitors the output frequency, when the output frequency of the water pump reaches the rated frequency of the water pump in the set counting time, the drive host reads the number of the next slave in the circulation list;
sa3023, judging whether the number is the local number, when the number is the local number, indicating that all water pumps are started, and when the number is not the local number, the driver host sends a start command to the driver slave represented by the number;
the Sa3021, the drive master cycles through step S301, and sequentially turns on the next drive slave.
The method for sequentially turning off the driver slaves in step S302 includes the following steps:
sb3021, numbering and sequencing a driver host and a driver slave respectively in a networking circulation list, wherein the driver host judges whether the output frequency obtained through an MPPT algorithm is equal to the lowest running output frequency of a water pump, when the output frequency of the water pump is greater than the lowest running frequency of the water pump, the driver host clears the time count of the next driver slave in the networking circulation list, the driver host continues to monitor the output frequency, and when the output frequency of the water pump is equal to the lowest running frequency of the water pump, the driver host closes the time count of the next driver slave station;
sb3022, judging whether the output frequency of the water pump connected with the drive host reaches the lowest running frequency of the water pump in the set counting time, when the output frequency of the water pump does not reach the lowest running frequency of the water pump in the set counting time, the drive host continuously monitors the output frequency, when the output frequency of the water pump reaches the lowest running frequency of the water pump in the set counting time, the drive host reversely reads the number of the next slave in the circulation list;
sb3023 for judging whether the number is a local number, when the number is the local number, indicating that only the water pump connected with the driver host operates, and when the number is not the local number, the driver host sends a closing command to the driver slave represented by the number;
sb3021, the drive master cycles through step S301, successively turning off the next drive slave.
According to the invention, under the same photovoltaic array, a plurality of low-power photovoltaic water pumps are connected in parallel to lift water, and the drivers in the system are communicated through serial ports. One of the drivers is used as a master to control and the other is used as a slave. Through the intelligent algorithm, the next site can be automatically switched to serve as the host under the condition that the host fails or breaks lines, and the normal operation of the water lifting system is ensured.
In the case of sunlight, the drive host is started first, and the output frequency of the drive host is adjusted according to the MPPT algorithm. When the energy of the photovoltaic array is sufficient to support the operation of the master to the rated frequency of the water pump, the driver slave 1 is turned on. And so on, when the illumination is sufficient, all the driver slaves can be started. When the sunlight is weakened, the output frequency of the drive host machine can be reduced according to the MPPT algorithm, when the minimum frequency required by the lift is reached, one slave machine is stopped, and the like, and only one machine of the host machine operates under the condition of insufficient sunlight. The slave machine operates according to the rated frequency of the water pump, and meanwhile, the master machine always adjusts the output frequency through the MPPT algorithm, so that the energy generated by the photovoltaic array is utilized to the maximum extent. The water pump can work at a higher rotating speed under the condition of weak illumination, the energy and the water pump efficiency generated by the photovoltaic array are fully utilized, and the water extraction quantity is effectively improved.
The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The utility model provides a host fault control method of light Fu Zhineng centralized control water lifting system based on MPPT algorithm, light Fu Zhineng centralized control water lifting system includes photovoltaic array, a plurality of driver and a plurality of water pump, photovoltaic array is connected with the driver respectively, the driver includes a driver host computer and at least one driver slave machine, every driver connects at least one water pump respectively;
the driver includes: the system comprises a micro-control module, a motor driving module, an inversion module, a current and voltage detection module, an MPPT module, a photovoltaic intelligent centralized control module and a communication module, wherein the micro-control module is respectively and electrically connected with the motor driving module, the inversion module, the MPPT module, the photovoltaic intelligent centralized control module and the communication module, and the motor driving module is also connected with a water pump through the inversion module; the drivers are in communication connection through a communication module, and the driver host controls the driver slave to be started or closed through the communication module; the photovoltaic intelligent centralized control module is used for detecting the running condition of a driver, and when the photovoltaic intelligent centralized control module detects that a driver host fails or breaks circuit, the driver host commands the next driver slave connected with the driver host to be automatically switched into a new driver host; the method is characterized by comprising the following steps of:
s101, numbering and sequencing a driver host and a driver slave respectively in a networking circulation list, and searching an address of a station of the next driver slave arranged behind the driver host in the networking circulation list by the driver host after the driver host fails;
s102, the driver host judges whether the site address is the address of the driver host, when the site address is the local address, the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm does not switch the driver host, and when the site address is not the local driver address, the driver host sends a host switching instruction to the next driver slave;
and S103, after the driver slave receives the instruction, judging whether to confirm switching to a new host, and after the driver slave confirms switching, replying the driver slave to the driver host, wherein the driver slave becomes the new driver host, and after the driver slave refuses switching, repeating the step S101, and searching the site address of the next driver slave of the driver slave.
2. The method for controlling a host fault of an optical Fu Zhineng centralized control water lifting system based on an MPPT algorithm according to claim 1, wherein the driver further comprises a dc input module, an output end of the dc input module is connected to the inverter module, and an input end of the dc input module is connected to the photovoltaic array.
3. The method for controlling the host fault of the light Fu Zhineng centralized control water lifting system based on the MPPT algorithm according to claim 1, wherein the micro control module is a DSP digital processing chip.
4. The method for controlling a host fault of an optical Fu Zhineng centralized control water lifting system based on an MPPT algorithm of claim 1, wherein the driver further comprises a pumping and water diffusion protection module electrically connected to the micro-control module.
5. The utility model provides a host computer broken line control method of light Fu Zhineng centralized control water lifting system based on MPPT algorithm, light Fu Zhineng centralized control water lifting system includes photovoltaic array, a plurality of driver and a plurality of water pump, photovoltaic array is connected with the driver respectively, the driver includes a driver host computer and at least one driver slave machine, every driver is connected at least one water pump respectively;
the driver includes: the system comprises a micro-control module, a motor driving module, an inversion module, a current and voltage detection module, an MPPT module, a photovoltaic intelligent centralized control module and a communication module, wherein the micro-control module is respectively and electrically connected with the motor driving module, the inversion module, the MPPT module, the photovoltaic intelligent centralized control module and the communication module, and the motor driving module is also connected with a water pump through the inversion module; the drivers are in communication connection through a communication module, and the driver host controls the driver slave to be started or closed through the communication module; the photovoltaic intelligent centralized control module is used for detecting the running condition of a driver, and when the photovoltaic intelligent centralized control module detects that a driver host fails or breaks circuit, the driver host commands the next driver slave connected with the driver host to be automatically switched into a new driver host; the method is characterized by comprising the following steps of:
s201, the driver slave counts the time interval between data sent by the driver host;
s202, the driver host judges whether the time interval exceeds the time interval of the local code, when the time interval does not exceed, the driver slave clears the count of the time interval of the data sent by the driver host, and when the time interval exceeds, the driver slave judges whether the driver slave has faults or not;
and S203, when the driver slave has no fault, the driver slave controls the local machine to be switched into the driver slave, and when the driver slave has the fault, the driver slave is not switched.
6. The method for controlling disconnection of a host of an optical Fu Zhineng centralized control water lifting system based on the MPPT algorithm of claim 5, wherein the driver further comprises a dc input module, an output end of the dc input module is connected to the inverter module, and an input end of the dc input module is connected to the photovoltaic array.
7. The method for controlling a host disconnection of an optical Fu Zhineng centralized control water lifting system based on an MPPT algorithm according to claim 5, wherein the micro-control module is a DSP digital processing chip.
8. The method for controlling a host disconnection of an MPPT algorithm-based light Fu Zhineng centralized control water lifting system according to claim 5, wherein the driver further comprises a pumping and water diffusion protection module electrically connected to the micro control module.
9. The utility model provides a method for improving the utilization ratio of light Fu Zhineng centralized control water lifting system based on MPPT algorithm, the light Fu Zhineng centralized control water lifting system comprises a photovoltaic array, a plurality of drivers and a plurality of water pumps, wherein the photovoltaic array is respectively connected with the drivers, the drivers comprise a driver host and at least one driver slave, and each driver is respectively connected with at least one water pump;
the driver includes: the system comprises a micro-control module, a motor driving module, an inversion module, a current and voltage detection module, an MPPT module, a photovoltaic intelligent centralized control module and a communication module, wherein the micro-control module is respectively and electrically connected with the motor driving module, the inversion module, the MPPT module, the photovoltaic intelligent centralized control module and the communication module, and the motor driving module is also connected with a water pump through the inversion module; the drivers are in communication connection through a communication module, and the driver host controls the driver slave to be started or closed through the communication module; the photovoltaic intelligent centralized control module is used for detecting the running condition of a driver, and when the photovoltaic intelligent centralized control module detects that a driver host fails or breaks circuit, the driver host commands the next driver slave connected with the driver host to be automatically switched into a new driver host; the method is characterized by comprising the following steps of:
s301, a driver host acquires the output frequency of a photovoltaic array, and adjusts the output frequency of a water pump connected with the driver host according to an MPPT algorithm;
s302, the driver host judges whether the output frequency obtained through an MPPT algorithm is equal to the rated output frequency of the water pump, so that the driver slave is turned on or turned off successively;
the method for sequentially starting the driver slaves in step S302 includes the following steps:
sa3021, numbering and sequencing a driver host and a driver slave respectively in a networking circulation list, wherein the driver host judges whether the output frequency obtained through an MPPT algorithm is equal to the rated output frequency of a water pump, when the output frequency of the water pump is smaller than the rated frequency of the water pump, the driver host clears the time count of the next driver slave in the networking circulation list, the driver host continues to monitor the output frequency, and when the output frequency of the water pump is equal to the rated frequency of the water pump, the driver host starts to count the time of the next driver slave station;
sa3022, judging whether the output frequency of the water pump connected with the drive host reaches the rated frequency of the water pump in the set counting time, when the output frequency of the water pump does not reach the rated frequency of the water pump in the set counting time, the drive host continuously monitors the output frequency, when the output frequency of the water pump reaches the rated frequency of the water pump in the set counting time, the drive host reads the number of the next slave in the circulation list;
sa3023, judging whether the number is the local number, when the number is the local number, indicating that all water pumps are started, and when the number is not the local number, the driver host sends a start command to the driver slave represented by the number;
the Sa3021, the drive master cycles through step S301, and sequentially turns on the next drive slave.
10. The method for improving the utilization rate of the light Fu Zhineng centralized control water pumping system based on the MPPT algorithm according to claim 9, wherein the method for sequentially turning off the driver slaves in step S302 comprises the following steps:
sb3021, numbering and sequencing a driver host and a driver slave respectively in a networking circulation list, wherein the driver host judges whether the output frequency obtained through an MPPT algorithm is equal to the lowest running output frequency of a water pump, when the output frequency of the water pump is greater than the lowest running frequency of the water pump, the driver host clears the time count of the next driver slave in the networking circulation list, the driver host continues to monitor the output frequency, and when the output frequency of the water pump is equal to the lowest running frequency of the water pump, the driver host closes the time count of the next driver slave station;
sb3022, judging whether the output frequency of the water pump connected with the drive host reaches the lowest running frequency of the water pump in the set counting time, when the output frequency of the water pump does not reach the lowest running frequency of the water pump in the set counting time, the drive host continuously monitors the output frequency, when the output frequency of the water pump reaches the lowest running frequency of the water pump in the set counting time, the drive host reversely reads the number of the next slave in the circulation list;
sb3023 for judging whether the number is a local number, when the number is the local number, indicating that only the water pump connected with the driver host operates, and when the number is not the local number, the driver host sends a closing command to the driver slave represented by the number;
sb3021, the drive master cycles through step S301, successively turning off the next drive slave.
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| CN113623166B (en) * | 2021-07-21 | 2022-07-05 | 深圳天源新能源股份有限公司 | Control method of multi-pump parallel photovoltaic pumping system, inverter and photovoltaic pumping system |
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