Wind and light storage inversion integrated control system for rural sewage treatment

Abstract

The invention relates to a wind and light storage inversion integrated control system for rural sewage treatment, which is applied to the technical field of sewage treatment, and comprises the steps that a fan charging control module, a photovoltaic charging control module, an inverter module, a main control module, a display screen and a key module are integrated into a whole to form a wind and light storage inversion integrated machine; the all-in-one machine is connected with the outside through terminal wiring, such as a wind power generation device, a solar power generation device and a storage battery, high integration is achieved, all control modules and functions are integrated, and the size of the device is greatly reduced while wind and light clean energy is used for supplying power; meanwhile, multiple control modes are preset in the main control module, selection can be carried out through an operation keyboard and a display screen according to the actual situation, the control task of field equipment can be completed only through the integrated control device, a traditional PLC system does not need to be used for control, investment cost is saved, and meanwhile the professional technical requirement for maintenance personnel is lowered.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a wind-solar-storage-inverter integrated control system for rural sewage treatment. Background Art

[0002] Rural sewage treatment sites generally occupy a small area and scale, and the overall system required is as small as possible; the sewage treatment load used by the system has a small power and is a single-phase power supply device with a relatively simple control function. At present, PLC (programmable logic controller) control systems are generally used in the control of the site to control the start and stop of the sewage treatment load, and the electricity is all from the mains. Although the annual electricity consumption of a single rural sewage treatment site is not large, the size of the village sewage site is very large, and the scale of electricity used cannot be underestimated. If it is necessary to use wind and solar clean energy for power supply, it is necessary to use multiple independent functional systems for integration, and the control system will become extremely large, which is not suitable for village sewage sites with smaller areas; at the same time, the control of the site sewage treatment load uses a PLC control system, which requires high professional knowledge of the operation and maintenance personnel, but in fact the operation and maintenance personnel of the village sewage site have limited capabilities. When problems occur in the control system, they cannot be solved in time and require on-site support from professional manufacturers. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an integrated wind, solar, storage and inverter control system for rural sewage treatment, so as to solve the problem in the prior art that rural sewage treatment sites usually use municipal electricity, which consumes a lot of electricity, while using wind and solar clean energy for power supply requires the use of multiple independent functional systems for integration, and the control system volume will become extremely large, which is not suitable for village sewage sites with smaller areas; at the same time, it solves the problem that the control of the site sewage treatment load uses a PLC control system, which requires high professional knowledge of the operation and maintenance personnel.

[0004] According to a first aspect of an embodiment of the present invention, a wind-solar-storage-inverter integrated control system for rural sewage treatment is provided; The wind-solar-storage-inverter integrated control system comprises: a display screen and a key module, a wind turbine charging control module, a photovoltaic charging control module, an inverter module and a main control module; The wind turbine charging control module is connected to the external wind power generation device and the storage battery respectively, and is used to rectify the three-phase alternating current generated by the external wind power generation device into direct current and store it in the external storage battery; The photovoltaic charging control module is connected to the external solar power generation device and the storage battery respectively, and is used to store the direct current generated by the external solar power generation device in the external storage battery; The inverter module is connected to the main control module and the external battery respectively, and the main control module is connected to the external sewage treatment load. The inverter module is used to invert the direct current stored in the external battery into a single-phase sinusoidal alternating current, and output it through the main control module to power the external sewage treatment load; The main control module is also connected to the external mains power, and is used to supply power to the external sewage treatment load through the external mains power when the power of the external battery is lower than the preset power threshold; and is also used to switch back to the battery to supply power to the external sewage treatment load when the power of the external battery is higher than the preset power threshold; The main control module has multiple control modes preset inside. The main control module is connected to the display screen and the button module. The display screen and the button module are used to select the control mode of the main control module. The display screen and the button module are also used to set parameters of different control modes and display parameter status.

[0005] Preferably, The main control module is also used to receive an analog input signal, and output an analog output signal according to the analog input signal to control the opening of the electric valve; The main control module is also used to receive a digital input signal, and output a digital output signal according to the digital input signal to control the start and stop of the external sewage treatment load. The external sewage treatment loads may include multiple loads, and the start and stop of multiple external sewage treatment loads may be controlled simultaneously according to the digital output signal.

[0006] Preferably, The digital input signal includes a plurality of sewage liquid level signals, and the plurality of sewage liquid level signals include a minimum liquid level signal, a low liquid level signal, a middle liquid level signal, a high liquid level signal, and a maximum liquid level signal.

[0007] Preferably, The wind-solar-storage-inverter integrated control system also includes an alarm module; When the main control module receives the minimum liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to stop running according to the digital output signal; at the same time, the main control module controls the alarm module to sound an alarm; When the main control module receives a low liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to stop running according to the digital output signal; When the main control module receives the middle liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to start running according to the digital output signal; When the main control module receives a high liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to start running according to the digital output signal; at the same time, the main control module controls the display screen and the button module to display preset warning information; When the main control module receives the highest liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to start running according to the digital output signal; at the same time, the main control module controls the alarm module to sound an alarm.

[0008] Preferably, The control modes of the main control module include: manual mode, time mode, automatic mode and remote mode.

[0009] Preferably, When the control mode of the main control module is the manual mode, the start and stop control of multiple external sewage treatment loads is achieved through the display screen and the button module.

[0010] Preferably, When the control mode of the main control module is the time mode, the start time and stop time of multiple external sewage loads are set through the display screen and the button module; The main control module outputs a digital output signal to control multiple external sewage treatment loads to start running during the start-stop time period; the main control module outputs a digital output signal to control multiple external sewage treatment loads to stop running outside the start-stop time period; The start-stop time period includes multiple ones.

[0011] Preferably, When the control mode of the main control module is automatic mode, either an analog input signal or a digital input signal is selected as a control basis; When the analog input signal is selected as the control basis, the start liquid level and stop liquid level of multiple external sewage treatment loads are set through the display screen and the key module. When the actual external liquid level received by the main control module is greater than the start liquid level, the main control module controls the multiple external sewage treatment loads to start running. When the actual external liquid level received by the main control module is less than the stop liquid level, the main control module controls the multiple external sewage treatment loads to stop running. The actual external liquid level is obtained through the analog input signal received by the main control module; When the digital input signal is selected as the control basis, when the main control module receives the middle liquid level signal, the high liquid level signal or the maximum liquid level signal, the main control module controls multiple external sewage treatment loads to start running; when the main control module receives the low liquid level signal or the lowest liquid level signal, the main control module controls multiple external sewage treatment loads to stop running.

[0012] Preferably, The main control module is also connected to an external remote control module; When the control mode of the main control module is the remote mode, the main control module controls the start and stop of the multiple external sewage treatment loads according to the control signal of the remote control module.

[0013] The technical solution provided by the embodiments of the present invention may have the following beneficial effects: The present application integrates the wind turbine charging control module, the photovoltaic charging control module, the inverter module, the main control module, the display screen and the button module into one to form a wind, solar, storage and inverter all-in-one machine. The connection between the all-in-one machine and the outside is realized through terminal wiring, such as wind power generation devices, solar power generation devices and batteries, etc., to achieve high integration. By integrating all control modules and functions into one, it meets the needs of using wind and solar clean energy for power supply while greatly reducing the size of the device; at the same time, by pre-setting a variety of control modes in the main control module, the selection can be made through the operating keyboard and display screen according to actual conditions. The control task of the on-site equipment can be completed by the integrated control device alone. There is no need to use the traditional PLC system for control, which saves investment costs. There is no need for manual intervention, and the operation and maintenance personnel do not need professional knowledge to operate the system, which reduces the professional and technical requirements for maintenance personnel.

[0014] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] Figure 1 is an overall system schematic diagram of a wind-solar-storage-inverter integrated control system for rural sewage treatment according to an exemplary embodiment; Figure 2 is a schematic diagram of control signal input and output of a main control module according to another exemplary embodiment; In the attached figure: 1-main control module, 2-wind turbine charging control module, 3-photovoltaic charging control module, 4-inverter module, 5-display screen and button module, 6-alarm module, 7-wind power generation device, 8-solar power generation device, 9-battery, 10-mains power, 11-sewage treatment load, 12-electric valve, 13-remote control module. DETAILED DESCRIPTION

[0017] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0018] Embodiment 1 Figure 1 is a schematic diagram of an overall system of a wind-solar-storage-inverter integrated control system for rural sewage treatment according to an exemplary embodiment. Figure 1 As shown, the system includes: Display screen and key module 5, wind turbine charging control module 2, photovoltaic charging control module 3, inverter module 4 and main control module 1; the main control module 1 is used for input / output connection of all external power or signals, is a unified interface of the all-in-one machine, and adopts terminal form; The wind turbine charging control module 2 is connected to the external wind power generation device 7 and the battery 9 respectively, and is used to rectify the three-phase AC power generated by the external wind power generation device 7 into DC power and store it in the external battery 9; the photovoltaic charging control module 3 is connected to the external solar power generation device 8 and the battery 9 respectively, and is used to store the DC power generated by the external solar power generation device 8 in the external battery 9; it is worth noting that when the battery 9 is in a fully charged state, the excess electric energy generated by the wind power generation device 7 is released through the unloading resistor integrated in the all-in-one machine; The inverter module 4 is connected to the main control module 1 and the external battery 9 respectively, and the main control module 1 is connected to the external sewage treatment load 11. The inverter module 4 is used to invert the direct current stored in the external battery 9 into a single-phase sinusoidal alternating current, and output it through the main control module 1 to supply power to the external sewage treatment load 11; the external sewage treatment load 11 is a single-phase AC motor; The main control module 1 is also connected to the external mains 10, and is used to supply power to the external sewage treatment load 11 through the external mains 10 when the power of the external battery 9 is lower than the preset power threshold; it is also used to switch back to the battery 9 to supply power to the external sewage treatment load 11 when the power of the external battery 9 is higher than the preset power threshold; the all-in-one machine gives priority to solar energy and wind energy storage power supply, and automatically switches to mains power supply when there is no light, no wind and insufficient energy storage; when the energy storage and photovoltaic and wind power are satisfied, it automatically switches back to wind and solar power supply; The main control module 1 is preset with multiple control modes. The main control module 1 is connected to the display screen and the button module 5. The display screen and the button module 5 are used to select the control mode of the main control module 1. The display screen and the button module 5 are also used to set the parameters of different control modes and display the parameter status. The main control module 1 is also used to receive an analog input signal, and output an analog output signal according to the analog input signal to control the opening of the electric valve 12; The main control module 1 is also used to receive a digital input signal, output a digital output signal according to the digital input signal to control the start and stop of the external sewage treatment load 11, the external sewage treatment load 11 includes multiple, and the start and stop of multiple external sewage treatment loads 11 are controlled simultaneously according to the digital output signal; The digital input signal includes a plurality of sewage level signals, namely: a minimum level signal, a low level signal, a middle level signal, a high level signal and a maximum level signal, and may also be in the form of a receiving relay signal and a transistor signal, etc.; The wind-solar-storage-inverter integrated control system also includes an alarm module 6. When the main control module 1 receives the lowest liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads 11 to stop running according to the digital output signal; at the same time, the main control module 1 controls the alarm module 6 to alarm; when the main control module 1 receives a low liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads 11 to stop running according to the digital output signal; when the main control module 1 receives a medium liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads 11 to start running according to the digital output signal; when the main control module 1 receives a high liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads 11 to start running according to the digital output signal; at the same time, the main control module 1 controls the display screen and the button module 5 to display preset warning information; when the main control module 1 receives the highest liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads 11 to start running according to the digital output signal; at the same time, the main control module 1 controls the alarm module 6 to alarm, and the alarm module 6 can be a buzzer, etc.; The analog input signal AI is used to receive the 4~20mA liquid level signal, and the analog output signal AO is used to control the opening of the electric valve 12 according to the 4~20mA liquid level signal. It can also be a 0~20mA, 0~10V, ±10V signal to control the opening of the electric valve. For example: when the liquid level signal is 4mA, the opening of the electric valve 12 is 0, that is, the closed state. When the liquid level signal is 20mA, the opening of the electric valve 12 is 100%, that is, the maximum opening state. In other words, when the liquid level signal is 4~20mA, the opening of the electric valve 12 corresponds to 0-100%; There are many control methods for the external sewage treatment load 11, including but not limited to manual, time, automatic, remote and other modes. When the control method is manual, the start and stop control of the sewage treatment load 11 is completed according to the combined operation of the display screen and the button module 5; when the control method is time, the load start time point and stop time point are set according to the user interface provided by the display screen and the button module 5. When the system time is within the start time point and the stop time point, the load starts automatically. When the system time is outside the start time point and the stop time point, the load stops automatically. The start and stop time periods support the setting of multiple time periods; when the control method is automatic, select one from the analog quantity or digital quantity as the control basis according to the user interface provided by the display screen and the button module 5. When the analog quantity is selected, set the load start liquid When the actual external liquid level received by the wind, solar, storage and inverter integrated machine is greater than the starting liquid level, the load starts automatically; when the actual external liquid level is less than the stop liquid level, the load stops automatically. The actual liquid level is collected by the analog input signal AI on the main control module 1; when the digital quantity is selected, when the main control module 1 receives a medium liquid level signal, a high liquid level signal or a maximum liquid level signal, it controls multiple external sewage treatment loads 11 to start running; when the main control module 1 receives a low liquid level signal or a minimum liquid level signal, it controls multiple external sewage treatment loads 11 to stop running; the main control module 1 is also connected to an external remote control module 13; when the control mode of the main control module 1 is remote mode, the start and stop of the load are controlled according to the signal of the remote control module 13 received by the RS485 communication interface on the main control module 1.

[0019] This embodiment also provides specific experimental results, as shown below: The sewage treatment load 11 has a total of 3 motors with a total power of 335W. The maximum input of the fan is designed to be 1, and the power of each fan is ≤1000W. The photovoltaic charging uses 2 MPPT (maximum power point tracking) modules, and the single MPPT is ≤3000W. The power consumption record table is as follows:

[0020] The above table is a record of the electricity used by the sewage treatment load in a certain period of time in an embodiment of the application of the wind, solar, storage and inverter integrated device. It can be seen from the table that the power generation of the wind and solar complementary system accounts for at least 91.4%, with obvious power saving effect and high clean energy utilization rate.

[0021] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0022] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0023] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0024] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0025] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0026] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0027] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0029] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A wind, solar, storage and inverter integrated control system for rural sewage treatment, characterized by: The wind-solar-storage-inverter integrated control system comprises: a display screen and a key module, a wind turbine charging control module, a photovoltaic charging control module, an inverter module and a main control module; The wind turbine charging control module is connected to the external wind power generation device and the storage battery respectively, and is used to rectify the three-phase alternating current generated by the external wind power generation device into direct current and store it in the external storage battery; The photovoltaic charging control module is connected to the external solar power generation device and the storage battery respectively, and is used to store the direct current generated by the external solar power generation device in the external storage battery; The inverter module is connected to the main control module and the external battery respectively, and the main control module is connected to the external sewage treatment load. The inverter module is used to invert the direct current stored in the external battery into a single-phase sinusoidal alternating current, and output it through the main control module to power the external sewage treatment load; The main control module is also connected to the external mains power, and is used to supply power to the external sewage treatment load through the external mains power when the power of the external battery is lower than the preset power threshold; and is also used to switch back to the battery to supply power to the external sewage treatment load when the power of the external battery is higher than the preset power threshold; The main control module has multiple control modes preset inside. The main control module is connected to the display screen and the button module. The display screen and the button module are used to select the control mode of the main control module. The display screen and the button module are also used to set parameters of different control modes and display parameter status.

2. The system according to claim 1, characterized in that The main control module is also used to receive an analog input signal, and output an analog output signal according to the analog input signal to control the opening of the electric valve; The main control module is also used to receive a digital input signal, and output a digital output signal according to the digital input signal to control the start and stop of the external sewage treatment load. The external sewage treatment loads may include multiple loads, and the start and stop of multiple external sewage treatment loads may be controlled simultaneously according to the digital output signal.

3. The system according to claim 2, characterized in that The digital input signal includes a plurality of sewage liquid level signals, and the plurality of sewage liquid level signals include a minimum liquid level signal, a low liquid level signal, a middle liquid level signal, a high liquid level signal, and a maximum liquid level signal.

4. The system according to claim 3, characterized in that The wind-solar-storage-inverter integrated control system also includes an alarm module; When the main control module receives the minimum liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to stop running according to the digital output signal; at the same time, the main control module controls the alarm module to sound an alarm; When the main control module receives a low liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to stop running according to the digital output signal; When the main control module receives the middle liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to start running according to the digital output signal; When the main control module receives a high liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to start running according to the digital output signal; at the same time, the main control module controls the display screen and the button module to display preset warning information; When the main control module receives the highest liquid level signal, it outputs a digital output signal, and controls multiple external sewage treatment loads to start running according to the digital output signal; at the same time, the main control module controls the alarm module to sound an alarm.

5. The system according to claim 4, characterized in that The control modes of the main control module include: manual mode, time mode, automatic mode and remote mode.

6. The system according to claim 5, characterized in that When the control mode of the main control module is the manual mode, the start and stop control of multiple external sewage treatment loads is achieved through the display screen and the button module.

7. The system according to claim 6, characterized in that When the control mode of the main control module is the time mode, the start time and stop time of multiple external sewage loads are set through the display screen and the button module; The main control module outputs a digital output signal to control multiple external sewage treatment loads to start running during the start-stop time period; the main control module outputs a digital output signal to control multiple external sewage treatment loads to stop running outside the start-stop time period; The start-stop time period includes multiple ones.

8. The system according to claim 7, characterized in that When the control mode of the main control module is automatic mode, either an analog input signal or a digital input signal is selected as a control basis; When the analog input signal is selected as the control basis, the start liquid level and stop liquid level of multiple external sewage treatment loads are set through the display screen and the key module. When the actual external liquid level received by the main control module is greater than the start liquid level, the main control module controls the multiple external sewage treatment loads to start running. When the actual external liquid level received by the main control module is less than the stop liquid level, the main control module controls the multiple external sewage treatment loads to stop running. The actual external liquid level is obtained through the analog input signal received by the main control module; When the digital input signal is selected as the control basis, when the main control module receives the middle liquid level signal, the high liquid level signal or the maximum liquid level signal, the main control module controls multiple external sewage treatment loads to start running; when the main control module receives the low liquid level signal or the lowest liquid level signal, the main control module controls multiple external sewage treatment loads to stop running.

9. The system according to claim 8, characterized in that The main control module is also connected to an external remote control module; When the control mode of the main control module is the remote mode, the main control module controls the start and stop of the multiple external sewage treatment loads according to the control signal of the remote control module.

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