Energy supply system of photovoltaic production line

Abstract

The utility model relates to an energy supply system of a photovoltaic production line. The system comprises a pump set, a pressure gauge and energy supply equipment, the pump set comprises an energy delivery pump and a frequency converter. The output end of the energy supply equipment is connected with the input end of the energy delivery pump, the output end of the energy delivery pump is connected with the photovoltaic production line equipment, the output end of the energy delivery pump is further connected with one end of the pressure gauge, the other end of the pressure gauge is connected with the signal receiving end of the frequency converter, and the signal output end of the frequency converter is connected with a controller of the energy delivery pump; and the frequency converter is used for receiving the real-time pressure, sent by the pressure gauge, of the output end of the energy delivery pump, comparing the real-time pressure with the target pressure, and adjusting the working power of the energy delivery pump according to a comparison result, so that the real-time pressure is the same as the target pressure. According to the invention, the produced photovoltaic quality meets the requirements, and the production equipment is protected.

Description

Technical Field

[0001] This disclosure relates to the field of photovoltaic manufacturing technology, and in particular to the energy supply system of a photovoltaic production line. Background Technology

[0002] Photovoltaic production lines involve various energy supplies during manufacturing, such as water, oil, and compressed air. A sufficient energy supply ensures the continuous operation of production equipment and improves production efficiency. During the silicon wafer cutting process in photovoltaic production, coolant is needed to reduce the cutting temperature. The coolant is supplied to the cutting area through a cooling circulation system, carrying away the large amount of heat generated during cutting. Especially when using diamond wire cutting, the coolant needs to be supplied under certain pressure. This is because the cutting area requires the coolant to quickly and effectively remove heat and impurities. For example, when cutting silicon ingots at high speed, insufficient coolant pressure may prevent it from reaching the cutting area adequately.

[0003] However, after the equipment is installed, as the operating time increases and the equipment itself wears out, the energy pressure provided by the equipment often fails to meet the requirements, resulting in the photovoltaic products not meeting the requirements or damage to the production equipment. Utility Model Content

[0004] To overcome the problems existing in related technologies, this disclosure provides an energy supply system for a photovoltaic production line. The technical solution is as follows:

[0005] According to a first aspect of the present disclosure, an energy supply system for a photovoltaic production line is provided, the system comprising:

[0006] Pump sets, pressure gauges, and energy supply equipment;

[0007] The pump set includes: an energy delivery pump and a frequency converter;

[0008] The output end of the energy supply equipment is connected to the input end of the energy delivery pump, the output end of the energy delivery pump is connected to the photovoltaic production line equipment, the output end of the energy delivery pump is also connected to one end of a pressure gauge, the other end of the pressure gauge is connected to the signal receiving end of the frequency converter, and the signal output end of the frequency converter is connected to the controller of the energy delivery pump.

[0009] The frequency converter is used to receive the real-time pressure at the output end of the energy delivery pump sent by the pressure gauge, compare the real-time pressure with the target pressure, and adjust the working power of the energy delivery pump according to the comparison result so that the real-time pressure is the same as the target pressure.

[0010] In one embodiment, the energy supply equipment includes: an energy supply host and an energy storage tank;

[0011] The pump unit further includes: a float switch; the float switch includes: a float and a switch;

[0012] The energy output terminal of the energy supply host is connected to the input terminal of the energy storage tank, and the output terminal of the energy storage tank is connected to the input terminal of the energy delivery pump.

[0013] The float is located in the energy storage tank, one end of the switch is connected to the first power terminal of the energy supply host, and the other end of the switch is connected to the second power terminal of the energy supply host;

[0014] The float switch is used to control the switch to open when the energy stored in the energy storage tank reaches a preset height, so as to control the energy supply host to stop working.

[0015] In one embodiment, the system further includes: a control switch;

[0016] The control switch includes: remote gear, local gear, and stop gear;

[0017] One contact corresponding to the remote gear position is connected to the energy supply equipment and the energy delivery pump, the other contact corresponding to the remote gear position is connected to the input terminal of the remote signal switch, the output terminal of the remote signal switch is connected to the power supply, and the signal terminal of the remote signal switch is connected to the remote control host.

[0018] One contact corresponding to the local gear is connected to the energy supply equipment and the energy delivery pump, and the other contact corresponding to the local gear is connected to the power supply.

[0019] One contact corresponding to the stop position is connected to the energy supply equipment and the energy delivery pump, and the other contact corresponding to the stop position is connected to the power supply.

[0020] In one embodiment, the control switch includes a relay;

[0021] The first normally open contact of the relay is connected to the energy supply equipment and the energy delivery pump, and the second normally open contact of the relay is connected to the input terminal of the remote signal switch.

[0022] In one embodiment, the control switch includes a rotary switch.

[0023] In one embodiment, the signal terminal of the remote signal switch communicates with the remote control host via TCP / IP.

[0024] In one embodiment, the energy supply host includes a water purifier, and the energy storage tank includes a water storage tank.

[0025] In one embodiment,

[0026] The pressure gauge outputs an analog signal;

[0027] The frequency converter includes: analog input terminals;

[0028] The other end of the pressure gauge is connected to the analog input terminal.

[0029] In one embodiment, the pressure gauge includes: a pressure transmitter;

[0030] The output end of the energy transfer pump is also connected to one end of the pressure transmitter, and the other end of the pressure transmitter is connected to the signal receiving end of the frequency converter.

[0031] In one embodiment, the frequency converter includes: a proportional-derivative adjustment module;

[0032] The other end of the pressure gauge is connected to the input end of the proportional-derivative adjustment module, and the output end of the proportional-derivative adjustment module is connected to the controller of the energy delivery pump.

[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0035] Figure 1 This is a schematic diagram of the energy supply system of a photovoltaic production line according to an exemplary embodiment. Figure 1 .

[0036] Figure 2 This is a schematic diagram of the energy supply system of a photovoltaic production line according to an exemplary embodiment. Figure 2 .

[0037] Figure 3 This is a schematic diagram of the energy supply system of a photovoltaic production line according to an exemplary embodiment. Figure 3 .

[0038] Figure 4 This is a schematic diagram of a remote screen display of an energy supply system for a photovoltaic production line, according to an exemplary embodiment.

[0039] Figure 5 This is a schematic diagram illustrating the connection between a pressure transmitter and a frequency converter controller according to an exemplary embodiment.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Pump set; 11-Energy transfer pump; 12-Frequency converter; 2-Pressure gauge; 21-Pressure transmitter; 3-Energy supply equipment; 31-Energy supply main unit; 311-Water purifier; 32-Energy storage tank; 321-Water storage tank; 4-Photovoltaic production line equipment. Detailed Implementation

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0043] Figure 1 This is a schematic diagram of the energy supply system of a photovoltaic production line according to an exemplary embodiment, such as... Figure 1 As shown, the system includes: pump set 1, pressure gauge 2 and energy supply equipment 3; pump set 1 includes: energy delivery pump 11 and frequency converter 12.

[0044] The output end of the energy supply equipment 3 is connected to the input end of the energy delivery pump 11. The output end of the energy delivery pump 11 is connected to the photovoltaic production line equipment. The output end of the energy delivery pump 11 is also connected to one end of the pressure gauge 2. The other end of the pressure gauge 2 is connected to the signal receiving end of the frequency converter 12. The signal output end of the frequency converter 12 is connected to the controller of the energy delivery pump 11.

[0045] The frequency converter 12 is used to receive the real-time pressure at the output end of the energy delivery pump 11 sent by the pressure gauge 2, compare the real-time pressure with the target pressure, and adjust the working power of the energy delivery pump 11 according to the comparison result so that the real-time pressure is the same as the target pressure.

[0046] In this disclosure, the real-time pressure of the energy output from the energy delivery pump 11 is obtained through pressure gauge 2, and the collected real-time pressure is sent to the frequency converter 12. The frequency converter 12 compares the real-time pressure with the target pressure. If a difference is found between the real-time pressure and the target pressure, the operating power of the energy delivery pump 11 is adjusted to make the real-time pressure of the energy output from the energy delivery pump 11 the same as the target pressure. In this way, even after the equipment is installed and the operating time increases, due to wear and tear of the equipment itself, the energy pressure provided by the equipment will still meet the requirements, thereby ensuring that the quality of the photovoltaic products meets the requirements and protecting the production equipment.

[0047] In one embodiment, such as Figure 2As shown, the energy supply equipment 3 includes: an energy supply host 31 and an energy storage tank 32.

[0048] The energy output end of the energy supply host 31 is connected to the input end of the energy storage tank 32, and the output end of the energy storage tank 32 is connected to the input end of the energy delivery pump 11.

[0049] The energy supply host 31 can provide energy, and the energy storage tank 32 can store the energy provided by the energy supply host 31.

[0050] In photovoltaic production, equipment such as silicon wafer cleaning equipment, solution preparation equipment, photolithography equipment, coating equipment, and cooling equipment require water purification (ultrapure water).

[0051] Silicon wafer cleaning equipment: Silicon wafers are the basic material for photovoltaic cells, and the cleanliness of their surface is crucial to the performance and conversion efficiency of photovoltaic cells. During the production process, silicon wafers need to undergo multiple cleaning processes to remove impurities, dust, oil, and other contaminants from their surface. If the cleaning water contains impurities, residues will form on the silicon wafer surface, affecting subsequent process steps and product quality. Therefore, silicon wafer cleaning equipment needs to use ultrapure water.

[0052] Solution preparation equipment: In the production process of photovoltaic cells, the preparation of some chemical reagents requires the use of high-purity water. For example, in the production of transistors and integrated circuits in the photovoltaic industry, a small amount of pure water is used for preparing chemical solutions. If the water contains impurities, it may affect the chemical reaction, leading to a decline in product quality or instability in the production process.

[0053] Photolithography equipment: Photolithography is one of the key processes in photovoltaic cell production, used to form circuit patterns on silicon wafers. The photolithography process requires chemical reagents such as photoresist and developer, and the preparation and use of these reagents require high-purity water. If the water contains impurities, it may affect the performance of the photoresist and the development effect, thus affecting the accuracy and quality of the circuit pattern.

[0054] Coating equipment: Coating is used to form a protective film or conductive layer on the surface of photovoltaic cells to improve their performance and stability. The coating process requires the use of high-purity water to clean the substrate and prepare the coating solution. If the water contains impurities, it may lead to uneven coating or a decrease in film quality.

[0055] Cooling equipment: Photovoltaic production equipment generates a large amount of heat during operation, requiring water for cooling. To prevent impurities in the water from corroding or clogging the equipment, the cooling equipment typically uses high-purity water.

[0056] Therefore, in one embodiment, such as Figure 3As shown, the energy supply host 31 includes a water maker 311, and the energy storage tank 32 includes a water storage tank 321. The water maker 311 is used to produce the water required by the aforementioned equipment, and the water storage tank 321 is used to store the water produced by the water maker 311.

[0057] In one embodiment, pump unit 1 further includes: a float switch; the float switch includes: a float and a switch.

[0058] The float is located in the energy storage tank 32. One end of the switch is connected to the first power terminal of the energy supply host 31, and the other end of the switch is connected to the second power terminal of the energy supply host 31. The float switch is used to control the switch to open when the energy stored in the energy storage tank 32 reaches a preset height, so as to control the energy supply host 31 to stop working.

[0059] A float switch, also called a floating switch, is a simple and easy-to-use liquid level control device. Float switches typically operate magnetically and have no mechanical connecting parts. When the measured medium floats the float, the float moves the main body, and simultaneously, the magnet at the other end of the float actuates the magnetic switch on the control rod, thus achieving the detection and control of the liquid level. Specifically, when the liquid level rises or falls, the float moves up and down accordingly, interacting with the magnetic elements inside the switch to trigger its on / off action, thereby controlling the operation or shutdown of related equipment.

[0060] In this disclosure, the float switch can prevent the energy storage tank 32 from overflowing. When the float switch detects that the energy stored in the energy storage tank 32 has reached a preset height, it controls the float switch to open, thereby cutting off the power supply line of the energy supply host 31 and forcing the energy supply host 31 to stop working, so as to prevent the energy supply host 31 from continuing to supply energy to the energy storage tank 32.

[0061] In one embodiment, the system further includes a control switch.

[0062] The control switches include: remote gear, local gear, and stop gear.

[0063] One contact corresponding to the local gear position is connected to the energy supply device 3 and the energy delivery pump 11, and the other contact corresponding to the local gear position is connected to the power supply. One contact corresponding to the remote gear position is connected to the energy supply device 3 and the energy delivery pump 11, and the other contact corresponding to the remote gear position is connected to the input terminal of the remote signal switch. The output terminal of the remote signal switch is connected to the power supply, and the signal terminal of the remote signal switch is connected to the remote control host. One contact corresponding to the stop gear position is connected to the energy supply device 3 and the energy delivery pump 11, and the other contact corresponding to the stop gear position is connected to the power supply.

[0064] By setting control switches including remote, local, and shutdown modes, diversified control of the energy supply system of the photovoltaic production line can be achieved.

[0065] When using the local gear, the user switches the control switch to the local gear, and the switch corresponding to the local gear closes. That is, the circuit between the two contacts of the switch corresponding to the local gear is connected. At this time, the circuit between the energy supply device 3 and the energy delivery pump 11 and the power supply is connected, so that the energy supply device 3 and the energy delivery pump 11 are powered on and work normally.

[0066] During remote control, the signal terminal of the remote signal switch communicates with the remote control host via TCP / IP.

[0067] The control host can adopt an existing automated control system, such as SIEMENS 410SMAR. During signal transmission, WinCC is used with TCP / IP for data communication to send signals to the signal terminals of remote signal switches. When using the remote setting, the user switches the control switch to the remote setting on-site and clicks "Start Energy Supply Device 3" on the display screen in the control room. This sends a work command to the remote signal switch. Upon receiving the work command, the remote signal switch closes to supply power to the energy supply device 3 and the energy delivery pump 11, enabling them to operate normally. Clicking "Close Energy Supply Device 3" on the screen sends a stop command to the remote signal switch. Upon receiving the stop command, the remote signal switch opens to disconnect the power supply circuit to the energy supply device 3 and the energy delivery pump 11, causing them to stop working.

[0068] The photovoltaic industry involves various energy supplies in its production and manufacturing processes, such as water, oil, and compressed air. However, due to planning oversights or subsequent equipment installation and adjustments, there is often insufficient linkage control between equipment. This is especially true in liquid supply, where the distance between the equipment operating point and the equipment monitoring room is far, making it difficult for personnel to monitor the equipment's operating status in real time. Furthermore, atmospheric pressure alone cannot meet the liquid pressure required for production. This invention will install an energy delivery pump 11 to increase the supply pressure and provides remote settings to enable remote control of the equipment.

[0069] like Figure 4 As shown, in control such Figure 3When the system is shown, a virtual start button and a virtual stop button for the water purifier 311 are displayed on the screen. Clicking "Start Energy Supply Device 3" on the display screen in the control room sends a working command to the remote signal switch. After receiving the working command, the remote signal switch closes to conduct power to supply power to the water purifier 311 and the energy delivery pump 11, enabling the water purifier 311 and the energy delivery pump 11 to work normally. Clicking "Stop Energy Supply Device 3" on the screen sends a stop working command to the remote signal switch. After receiving the stop working command, the remote signal switch opens to disconnect the power supply circuit to the water purifier 311 and the energy delivery pump 11, causing the water purifier 311 and the energy delivery pump 11 to stop working due to power failure.

[0070] When using the stop position, the user switches the control switch to the stop position on site. At this time, the corresponding switch of the stop position disconnects the circuit between the energy supply equipment 3 and the energy delivery pump 11 and the power supply.

[0071] Because rotary switches typically have multiple positions, enabling various functions or state switching, and their operation is relatively unique, requiring rotation for control, this reduces the probability of accidental operation. Furthermore, the internal structure of rotary switches is relatively simple, lacking complex springs, latches, and other easily damaged parts, and their rotating mechanical structure is quite robust and durable. With proper use and a good working environment, rotary switches generally have a long service life. Moreover, their contact method is relatively stable, not easily affected by external environmental factors, ensuring a long-term stable electrical connection. Therefore, the control switch in this disclosure can be a rotary switch.

[0072] Of course, in practical applications, other types of switches such as toggle switches and push-button switches can also be selected, and this disclosure does not limit them.

[0073] The system startup and shutdown disclosed herein has remote and local operation modes, which facilitates management and debugging.

[0074] The control switch can be implemented by a relay. In this case, the first normally open contact of the relay is connected to the energy supply equipment 3 and the energy delivery pump 11, and the second normally open contact of the relay is connected to the input terminal of the remote signal switch.

[0075] In one embodiment, pressure gauge 2 outputs an analog signal; frequency converter 12 includes: an analog input terminal; the other end of pressure gauge 2 is connected to the analog input terminal.

[0076] In one embodiment, pressure gauge 2 includes: pressure transmitter 21;

[0077] like Figure 5As shown, the output end of the energy transfer pump 11 is also connected to one end of the pressure transmitter 21, and the other end of the pressure transmitter 21 is connected to the signal receiving end of the frequency converter 12.

[0078] The pressure transmitter 21 is an instrument that converts pressure signals into standard output signals. The pressure transmitter 21 primarily operates based on the physical characteristics of pressure sensing elements. When pressure is applied to a sensing element (such as a strain gauge, capacitive sensor, or piezoresistive sensor), it causes a change in the physical quantity of the sensing element. Taking a strain gauge as an example, when subjected to pressure, the strain gauge deforms, and its resistance value changes accordingly.

[0079] The pressure transmitter 21 includes: a pressure sensor part, a signal conversion circuit, and a housing and interface part.

[0080] The pressure sensor is the core component, used to sense pressure signals. Its quality and performance directly determine the accuracy and stability of the pressure transmitter 21. For example, a high-precision pressure sensor uses advanced micromachining technology, enabling it to detect minute pressure changes more accurately.

[0081] The main function of a signal conversion circuit is to amplify, filter, and linearize the weak signals sensed by the sensor. For example, an amplifier circuit can amplify millivolt-level signals to a suitable voltage or current range, a linearization circuit can ensure that the output signal has a good linear relationship with pressure changes, and a filter circuit can remove noise interference from the signal.

[0082] The housing serves to protect the internal circuitry and sensors, and is typically made of corrosion-resistant and pressure-resistant materials. The interface section includes a pressure interface and a signal output interface. The pressure interface is used to connect to the pressure source being measured, and the signal output interface is used to transmit the converted standard signal to other devices.

[0083] In this embodiment, an energy delivery pump 11 is installed at the output end of the water storage tank 321, which includes a frequency converter 12 and the energy delivery pump 11; then, a pressure gauge 2 with analog feedback is installed at the output pipe port of the energy delivery pump 11 and connected to the analog input terminal of the frequency converter 12 (e.g., pressure gauge 2 with analog feedback). Figure 5 (As shown); the inverter 12 is started by terminal starting, and a passive float switch is installed at the starting terminal; finally, the position of the float in the float switch in the water tank 321 is adjusted so that the float is closed when the water tank 321 is short of water, and the float switch is opened when the liquid level meets a certain height.

[0084] In one embodiment, the frequency converter 12 may include: a proportional adjustment module;

[0085] The other end of pressure gauge 2 is connected to the input end of proportional control module, and the output end of proportional control module is connected to the controller of energy transfer pump 11.

[0086] Proportional control (P control): Proportional control is a basic control strategy. Its control action is to output a control signal proportional to the magnitude of the deviation. Let the deviation be e(t) (the difference between the setpoint and the actual value), and the proportional coefficient be K. p Then the output of proportional control is u(t) = K p ×e(t). For example, in a temperature control system, if the set temperature is 80℃ and the actual temperature is 70℃, the deviation e(t) = 80 - 70 = 10℃. If K p If = 2, then the output control signal u(t) = 2 × 10 = 20. The characteristic of proportional control is its fast adjustment speed, but it has a steady-state error.

[0087] In one embodiment, the frequency converter 12 includes: a differential adjustment module;

[0088] The other end of pressure gauge 2 is connected to the input end of the differential adjustment module, and the output end of the differential adjustment module is connected to the controller of energy transfer pump 11.

[0089] Derivative control (D control): Derivative control adjusts the signal based on the rate of change of the deviation signal. Let the rate of change of the deviation signal be... The differential time constant is T d The output of the differential adjustment For example, in a liquid level control system, if the liquid level drops rapidly, the differential control will output a large control signal based on this rate of drop to quickly stop the drop in liquid level. It can predict the trend of deviation changes and play a proactive regulatory role.

[0090] In one embodiment, the frequency converter 12 includes: a proportional-derivative adjustment module;

[0091] The other end of pressure gauge 2 is connected to the input end of the proportional-derivative control module, and the output end of the proportional-derivative control module is connected to the controller of energy transfer pump 11.

[0092] Proportional-Derivative (PD) Control: Combines proportional and derivative control to control the output. This adjustment method utilizes both the advantage of proportional control in quickly responding to deviations and the proactive control characteristic of derivative control, which can effectively improve the dynamic performance of the system.

[0093] In a typical automatic control system, such as the system disclosed herein, when a deviation occurs between a given target pressure and the actual pressure, the proportional component immediately outputs a control signal based on the magnitude of the deviation to adjust the operating power of the energy transfer pump 11, bringing the actual pressure closer to the target pressure. Simultaneously, the derivative component monitors the rate of change of the real-time pressure deviation. If the rate of change of the real-time pressure deviation is rapid, for example, if the energy transfer pump 11 is suddenly affected by external factors and its power drops sharply, the derivative component outputs a larger control signal. This signal is added to the signal from the proportional component, and together they act on the controller of the energy transfer pump 11, rapidly adjusting the operating power and speed of the energy transfer pump 11, allowing the actual pressure to recover to the target pressure more quickly.

[0094] Of the three adjustment methods mentioned above, increasing K... p The system's response speed will increase. Because the proportional gain is larger, the output control signal is stronger for the same deviation, enabling the controlled object to approach the given value more quickly. However, K... p An excessively large value could cause system oscillations. For example, in a robotic arm position control system, if K... p If K is too large, the robotic arm may oscillate due to over-correction when approaching the target position, making it unable to stabilize at the target position. Decrease K. p The system response speed will be slower, but the system will be more stable. In some systems with high stability requirements, such as high-precision optical instrument position adjustment systems, K may be appropriately reduced. p To ensure system stability.

[0095] Increase T d The system's proactive control capability is enhanced. It can better predict the changing trend of deviations and implement control measures in advance, which is very helpful for systems with large inertia or significant time delays. For example, in a temperature control system for a large heating furnace, due to the furnace's large thermal inertia, appropriately increasing T... d The heating power can be adjusted in advance to reduce temperature overshoot.

[0096] Decrease T d The predictive control effect of differential regulation weakens. If T d If the value is too small, the differential adjustment may not be able to effectively predict the trend of the deviation, and the dynamic performance of the system may be affected, especially when the system is subjected to rapid disturbances, the time to recover to a steady state may become longer.

[0097] The automatic control system for the output pressure of the energy transfer pump 11 in this disclosure can adopt a closed-loop control method. The pressure gauge 2 with analog output feeds back the signal corresponding to the real-time pressure to the frequency converter 12. If there is an error with the target pressure set in the frequency converter 12, the output frequency of the frequency converter 12 is adjusted through the proportional and derivative links to keep the output real-time pressure near the target pressure. For example, if the real-time pressure is low, the power is increased, and if the real-time pressure is high, the power is decreased. The PID parameters can also be modified to adjust the system response speed.

[0098] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0099] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An energy supply system for a photovoltaic production line, characterized in that, The system includes: Pump set (1), pressure gauge (2) and energy supply equipment (3); The pump set (1) includes: an energy delivery pump (11) and a frequency converter (12); The output end of the energy supply equipment (3) is connected to the input end of the energy delivery pump (11), the output end of the energy delivery pump (11) is connected to the photovoltaic production line equipment, the output end of the energy delivery pump (11) is also connected to one end of the pressure gauge (2), the other end of the pressure gauge (2) is connected to the signal receiving end of the frequency converter (12), and the signal output end of the frequency converter (12) is connected to the controller of the energy delivery pump (11). The frequency converter (12) is used to receive the real-time pressure at the output end of the energy delivery pump (11) sent by the pressure gauge (2), compare the real-time pressure with the target pressure, and adjust the working power of the energy delivery pump (11) according to the comparison result so that the real-time pressure is the same as the target pressure.

2. The system according to claim 1, characterized in that, The energy supply equipment (3) includes: an energy supply host (31) and an energy storage tank (32); The pump unit (1) further includes: a float switch; the float switch includes: a float and a switch; The energy output end of the energy supply host (31) is connected to the input end of the energy storage tank (32), and the output end of the energy storage tank (32) is connected to the input end of the energy delivery pump (11). The float is located in the energy storage tank (32), one end of the switch is connected to the first power terminal of the energy supply host (31), and the other end of the switch is connected to the second power terminal of the energy supply host (31); The float switch is used to control the switch to open when the energy stored in the energy storage tank (32) reaches a preset height, so as to control the energy supply host (31) to stop working.

3. The system according to claim 1, characterized in that, The system also includes: a control switch; The control switch includes: remote gear, local gear, and stop gear; One contact corresponding to the remote gear position is connected to the energy supply device (3) and the energy delivery pump (11), the other contact corresponding to the remote gear position is connected to the input terminal of the remote signal switch, the output terminal of the remote signal switch is connected to the power supply, and the signal terminal of the remote signal switch is connected to the remote control host. One contact corresponding to the local gear position is connected to the energy supply device (3) and the energy delivery pump (11), and the other contact corresponding to the local gear position is connected to the power supply. One contact corresponding to the stop position is connected to the energy supply equipment (3) and the energy delivery pump (11), and the other contact corresponding to the stop position is connected to the power supply.

4. The system according to claim 3, characterized in that, The control switch includes a relay; The first normally open contact of the relay is connected to the energy supply device (3) and the energy delivery pump (11), and the second normally open contact of the relay is connected to the input terminal of the remote signal switch.

5. The system according to claim 3, characterized in that, The control switch includes: a rotary switch.

6. The system according to claim 3, characterized in that, The signal terminal of the remote signal switch communicates with the remote control host via TCP / IP.

7. The system according to any one of claims 1-6, characterized in that, The energy supply host (31) includes a water purifier (311), and the energy storage tank (32) includes a water storage tank (321).

8. The system according to any one of claims 1-6, characterized in that, The pressure gauge (2) outputs an analog quantity; The frequency converter (12) includes: analog input terminals; The other end of the pressure gauge (2) is connected to the analog input terminal.

9. The system according to any one of claims 1-6, characterized in that, The pressure gauge (2) includes: a pressure transmitter (21); The output end of the energy transfer pump (11) is also connected to one end of the pressure transmitter (21), and the other end of the pressure transmitter (21) is connected to the signal receiving end of the frequency converter (12).

10. The system according to any one of claims 1-6, characterized in that, The frequency converter (12) includes: a proportional-derivative adjustment module; The other end of the pressure gauge (2) is connected to the input end of the proportional-derivative adjustment module, and the output end of the proportional-derivative adjustment module is connected to the controller of the energy delivery pump (11).

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