A transformer intelligent cooling system for a transformer substation

Abstract

The application discloses a transformer intelligent cooling system for a transformer substation, and particularly relates to the field of power equipment operation and maintenance, and is used for solving various defects of existing transformer cooling schemes, and comprises a core communication control device and a transformer fine water mist cooling device; the transformer is determined in a multidimensional manner according to environmental temperature information of the transformer, transformer body load information and operation environment information, and the transformer is precisely cooled by using a PID time domain control algorithm according to a real-time operation state of the transformer, so that the safe operation of the transformer is ensured, and the cost of maintenance of the transformer in the later period is reduced.

Description

Technical Field

[0001] This invention relates to the field of power equipment operation and maintenance, specifically to an intelligent cooling system for transformers in substations. Background Technology

[0002] As core equipment in substations, the stable operation of transformers is crucial for reliable power supply. Excessive temperatures accelerate the aging of internal components in power grid equipment, and prolonged operation of transformers at high temperatures poses safety hazards. To cool power facilities and create a healthier operating environment, external cooling of transformers is necessary. Common methods include using ice, blowers, mist cannons, and air conditioners. However, these methods have significant drawbacks: for example, ice cooling requires a large amount of ice, with an estimated cost of 30,000 RMB per 12 hours; blowers generate significant noise, affecting nearby residents; mist cannons can cause corrosion of power facilities; and while air conditioners offer high cooling efficiency, the initial investment in an air conditioner is substantial (100,000 RMB per unit), making large-scale application impractical.

[0003] Therefore, taking into account factors such as economy, people's livelihood, and safety, this invention proposes an intelligent cooling system for transformers in substations and other similar facilities. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of existing technical solutions, this invention provides an intelligent transformer cooling system for substations. This system determines the transformer's operating status from multiple dimensions by combining the transformer's ambient temperature information, transformer load information, and operating environment information. Based on the transformer's real-time operating status, a PID time-domain control algorithm is used to precisely cool the transformer, ensuring its safe operation and facilitating future maintenance and repair.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A transformer intelligent cooling system for substations includes a core communication control device and a transformer fine water mist cooling device. The core communication control device consists of a relay controller, a DI acquisition unit, dual Ethernet, RS485, a power supply, a CPU, etc., and adopts a 1U standard chassis. The transformer fine water mist cooling device mainly consists of a water tank, a pump group, a control cabinet, cooling pipes, nozzles, etc. The water tank, pump group, and control cabinet are integrated, with the pump group located at the bottom of the control cabinet and the water tank and control cabinet located at the top.

[0007] A further technical improvement of the present invention is that the core communication control device obtains data such as the active power P1, reactive power P0, power factor λ, and main transformer temperature T of the two main transformers in the substation through the relay controller, determines the action threshold of each main transformer load and the local temperature of the main transformer according to the site conditions, and performs real-time control of the fine water mist device on site after intelligent judgment through the PID time domain control algorithm.

[0008] The logic for determining the closing of the main transformer control relay is as follows: Given the main transformer control relay status V0, the main transformer fine water mist discharge status V1, the main transformer temperature T, the main transformer active power P1, and the power factor λ, and setting V2 = T and V3 = P1 / λ, the logic expression for determining the closing of the main transformer control relay is:

[0009] (V0==0&&V1==0)&&(V2≥α||V3≥β);

[0010] In the formula, V0 is the state of the main transformer control relay, with a default value of 0; V1 is the state of the main transformer fine water mist spray, with a default value of 0; V2 is the real-time acquired main transformer temperature T; V3 is the apparent power of the main transformer, calculated from the main transformer active power P1 and power factor λ; α and β are the control parameters of V2 and V3, respectively, obtained by the PID time-domain control algorithm. The discrete form of the formula for the control parameter α is as follows:

[0011]

[0012] In the formula, K p This is the proportional gain coefficient, with a default value of 0. K i It is the coefficient of the integral term, K d K is the coefficient of the differential term. i and K d This data is derived from the manufacturer's historical data.

[0013] When the above closing logic expression is true, the core communication control device feeds back a passive start signal to the field fine water mist device through the main transformer control relay. After receiving the start signal, the transformer cooling device opens the partition valve, the water supply pump and the main pump to spray water to cool the transformer.

[0014] The logic expression for determining the tripping of the main transformer control relay is as follows:

[0015] (V0==1||V1==1)&&(V2<α&&V3<β);

[0016] In the formula, V0 is the main transformer control relay state, with a default value of 0; V1 is the main transformer fine water mist spraying state, with a default value of 0; V2 is the main transformer temperature T obtained in real time; V3 is the apparent power of the main transformer, calculated from the main transformer active power P1 and power factor λ; α and β are the control parameters of V2 and V3, respectively, and α and β are obtained by PID control algorithm.

[0017] When the above tripping logic expression is true, the core communication control device sends a passive stop signal to the fine water mist device on site through the main transformer control relay. After receiving the stop signal, the transformer cooling device shuts down the main pump, the water supply pump, and the partition valve in sequence, and the transformer nozzles stop working.

[0018] It should be noted that the core communication control device acquires various transformer parameters at 10-second intervals and provides passive signals to the on-site fine water mist device at 30-second intervals.

[0019] A further technical improvement of the present invention is that the core communication control device has both manual and automatic operation modes;

[0020] Manual operation: Use the manual operation buttons on the control cabinet panel to control the main pump, water supply pump, No. 1 zone valve, No. 2 zone valve, and water supply solenoid valve;

[0021] Automatic operation: With the input of two passive signals, automatic start and stop functions can be realized, and the operating status is fed back out as a passive signal. When transformer #1 needs cooling protection, upon receiving the first set of passive signals, the system automatically starts the #1 partition valve, water supply pump, and main pump, and feeds back the operating status (#1 pressure switch) as a passive signal. When transformer #2 needs cooling protection, upon receiving the second set of passive signals, the system automatically starts the #2 partition valve, water supply pump, and main pump, and feeds back the operating status (#2 pressure switch) as a passive signal.

[0022] A further technical improvement of the present invention is that: the transformer fine water mist cooling device uses high-pressure fine water mist technology as its core, tap water as the medium, and after being pressurized by a high-pressure water pump, it is sprayed out in a mist form from a special nozzle, and performs three-dimensional motion in space in the following form with high-speed turbulence and rotation:

[0023]

[0024] In the formula, v is the water flow velocity, f is the vector sum of various forces acting on the water flow, and ρ is the water flow density. After being sprayed out, the water flow is fully entrained, broken, and atomized with the external air to produce a high-speed, uniform, and fine water mist with a diameter of 1 to 100 μm. The fine water mist is very easy to vaporize and absorb a large amount of heat, and has the advantages of fast cooling speed and low water consumption.

[0025] A further technical improvement of the present invention is that the transformer fine water mist cooling device has both manual and automatic control modes;

[0026] 1) Manual control mode:

[0027] a. Ensure the water tank is filled to 90% capacity;

[0028] b. Set the water injection solenoid valve to automatic mode;

[0029] c. Switch the main pump control, water supply pump control, and No. 1 zone valve control to manual mode;

[0030] d. First press the start button of the 1# zone valve or the start button of the 2# zone valve, or both, then press the start button of the water supply pump, and finally press the start button of the main pump. The 1# and 2# transformer nozzles will start spraying.

[0031] e. When it is necessary to stop, first press the main pump stop button, then press the water supply pump stop button, and finally press the stop button for the 1# zone valve and the 2# zone valve. The 1# and 2# transformer nozzles will then stop working.

[0032] 2) Automatic control mode:

[0033] a. Ensure the water tank is filled to 90% capacity;

[0034] b. Set the water injection solenoid valve to automatic mode;

[0035] c. Set the main pump control, water supply pump control, and No. 1 zone valve control to automatic mode;

[0036] d. Remotely send a #1 passive start signal, the #1 transformer nozzle starts spraying, and the system reports the spraying status. Remotely send a #1 passive stop signal, the #1 transformer nozzle stops spraying, and the system reports the stop status.

[0037] e. Remotely send a #2 passive start signal, the #2 transformer nozzle starts spraying, and the system reports the spraying status. Remotely send a #2 passive stop signal, the #2 transformer nozzle stops spraying, and the system reports the stop status.

[0038] f. When the system is in automatic control mode, the indicator light will remain on.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] 1. This invention determines the operating status of a transformer from multiple dimensions by combining the ambient temperature information, the load information of the transformer itself, and the operating environment information. Based on the real-time operating status of the transformer, a PID time-domain control algorithm is used to precisely cool the transformer, ensuring its safe operation and facilitating its maintenance in the future.

[0041] 2. The transformer fine water mist cooling device of the present invention takes high-pressure fine water mist technology as its core and tap water as the medium. It ensures the advantages of rapid cooling and low water consumption. By adding corrosion inhibitors to the water, the degree of corrosion on the transformer surface is reduced.

[0042] 3. In addition to intelligent control, the core communication control device and transformer fine water mist device of this invention retain human intervention measures, increase system redundancy and safety, and ensure the stable operation of the entire system. Attached Figure Description

[0043] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0044] Figure 1 This is a schematic diagram illustrating the working principle of the system of the present invention.

[0045] Figure 2 This is a structural diagram of the core communication control device of the present invention.

[0046] Figure 3 This is a structural diagram of the transformer cooling device of the present invention.

[0047] Figure 1 In the middle section: 1. Water tank; 2. Inlet solenoid valve; 3. Level transmitter; 4. Filter; 5. Low-pressure ball valve; 6. Make-up water pump; 7. High-pressure water pump; 8. Safety valve; 9. Pressure regulating overflow valve; 10. Pressure transmitter; 11. No. 1 zone valve; 12. No. 1 pressure switch; 13. No. 2 zone valve; 14. No. 2 pressure switch; 15. No. 1 spray pipeline; 16. No. 2 spray pipeline; 17. Fine water mist nozzle.

[0048] Figure 2In the center: L, AC 220V live wire or DC 220V; N, AC 220V neutral wire or DC 220V; PE, ground wire; COM, common terminal for digital inputs; D4, 4th digital input; D3, 3rd digital input; D2, 2nd digital input; D1, 1st digital input; K4, 4th passive relay input contact; K3, 3rd passive relay input contact; K2, 2nd passive relay input contact; K1, 1st passive relay input contact; B, RS485 communication interface; A, RS485 communication interface; NET2, 2nd network interface; NET1, 1st network interface; USB3, 3rd USB interface; USB5, 5th USB interface.

[0049] Figure 3 In the middle: 1. Water tank; 2. Control cabinet; 3. Vent port; 4. Pump set; 5. Motor; 6. High-pressure water pump; 7. No. 1 zone outlet; 8. No. 2 zone outlet. Detailed Implementation

[0050] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Example 1

[0052] This invention discloses an intelligent transformer cooling system for substations, comprising a core communication control device and a transformer fine water mist cooling device. The core communication control device consists of a relay controller, a DI acquisition unit, dual Ethernet, RS485, a power supply, a CPU, etc., and adopts a 1U standard chassis. The transformer fine water mist cooling device includes a water tank, a pump set, a control cabinet, cooling pipes, nozzles, etc., wherein the water tank, pump set, and control cabinet are integrated, with the pump set located at the bottom of the control cabinet and the water tank and control cabinet located at the top.

[0053] Figure 1 The present invention provides a system working principle diagram of an intelligent transformer cooling system for substations. The core communication control device obtains data such as active power P1, reactive power P0, power factor λ, and transformer temperature T of the two main transformers in the substation through the relay controller. Based on the site conditions, it determines the action threshold of each main transformer load and local transformer temperature, and performs real-time control of the fine water mist device on site after intelligent judgment through PID time-domain control algorithm.

[0054] The logic for determining the closing of the main transformer control relay is as follows: Given the main transformer control relay status V0, the main transformer fine water mist discharge status V1, the main transformer temperature T, the main transformer active power P1, and the power factor λ, and setting V2 = T and V3 = P1 / λ, the logic expression for determining the closing of the main transformer control relay is:

[0055] (V0==0&&V1==0)&&(V2≥α||V3≥β);

[0056] In the formula, V0 is the state of the main transformer control relay, with a default value of 0; V1 is the state of the main transformer fine water mist spray, with a default value of 0; V2 is the real-time acquired main transformer temperature T; V3 is the apparent power of the main transformer, calculated from the main transformer active power P1 and power factor λ; α and β are the control parameters of V2 and V3, respectively, obtained by the PID time-domain control algorithm. The discrete form of the formula for the control parameter α is as follows:

[0057]

[0058] In the formula, K p This is the proportional gain coefficient, with a default value of 0. K i It is the coefficient of the integral term, K d K is the coefficient of the differential term. i and K d This data is derived from the manufacturer's historical data.

[0059] When the above closing logic expression is true, the core communication control device feeds back a passive start signal to the field fine water mist device through the main transformer control relay. After receiving the start signal, the transformer cooling device opens the partition valve, the water supply pump and the main pump to spray water to cool the transformer.

[0060] The logic expression for determining the tripping of the main transformer control relay is as follows:

[0061] (V0==1||V1==1)&&(V2<α&&V3<β);

[0062] In the formula, V0 is the main transformer control relay state, with a default value of 0; V1 is the main transformer fine water mist spraying state, with a default value of 0; V2 is the main transformer temperature T obtained in real time; V3 is the apparent power of the main transformer, calculated from the main transformer active power P1 and power factor λ; α and β are the control parameters of V2 and V3, respectively, and α and β are obtained by PID control algorithm.

[0063] When the above tripping logic expression is true, the core communication control device sends a passive stop signal to the fine water mist device on site through the main transformer control relay. After receiving the stop signal, the transformer cooling device shuts down the main pump, the water supply pump, and the partition valve in sequence, and the transformer nozzles stop working.

[0064] It should be noted that the core communication control device acquires various transformer parameters at 10-second intervals and provides passive signals to the on-site fine water mist device at 30-second intervals.

[0065] The on-site fine water mist device uses high-pressure fine water mist technology as its core, with tap water as the medium. After being pressurized by a high-pressure water pump, the water is sprayed out in a mist form from a specially designed nozzle, and performs three-dimensional motion in space in the following manner through high-speed turbulence and optional configuration:

[0066]

[0067] In the formula, v is the water flow velocity, f is the vector sum of various forces acting on the water flow, and ρ is the water flow density. After being sprayed out, the water flow is fully entrained, broken, and atomized with the external air to produce a high-speed, uniform, and fine water mist with a diameter of 1 to 100 μm. The fine water mist is very easy to vaporize and absorb a large amount of heat, and has the advantages of fast cooling speed and low water consumption.

[0068] Example 2

[0069] Figure 2 The structural diagram of the core communication control device of this invention is provided. The device adopts a 1U standard chassis structure, and the wiring instructions for the terminals on the back of the chassis are as follows:

[0070] L, N, PE: Connect to AC220V or DC220V on the remote control panel;

[0071] COM: Common terminal for signal feedback from the on-site fine water mist device;

[0072] D1: Connect to the feedback signal for fine water mist discharge from main transformer No. 1;

[0073] D2: Connect to the feedback signal for the fine water mist discharge of main transformer No. 2;

[0074] K1: Connects to the fine water mist spray control signal of main transformer No. 1;

[0075] K2: Connect to the fine water mist spray control signal of main transformer No. 2;

[0076] NET2: Connect to auxiliary remote control motor;

[0077] NET1: Connect to auxiliary control or dispatch remote motor.

[0078] The default parameters for the rear terminal blocks of the chassis are as follows:

[0079] NET1 IP: 192.168.100.123;

[0080] NET2 IP: 192.168.0.111;

[0081] RS485: 9600bps, 8 data bits, 1 stop bit, no parity.

[0082] Example 3

[0083] Figure 3 A structural diagram of the transformer cooling device of the present invention is provided. The transformer cooling device mainly includes a water tank, a pump set, a control cabinet, cooling pipes, and nozzles. The water tank, pump set, and control cabinet are integrated as a whole, with the pump set located at the lower part of the control cabinet and the water tank and control cabinet located at the upper part. A brief description of each component is provided below.

[0084] The water tank is made of 304 stainless steel, with thermal insulation material added to the side panels and top. The water tank is equipped with an inlet filter and an outlet filter to ensure the normal operation of the high-pressure water pump and nozzles in the system. The water tank has a liquid level display function and can automatically replenish water. When the water level in the tank is below 90%, it will automatically replenish water, and when the water level reaches 100%, it will stop replenishing water. There is a vent at the bottom of the water tank. When the tank is not used for a long time or when the ambient temperature is below 4℃, the water should be drained.

[0085] The pump set includes a makeup water pump, a high-pressure water pump, a pressure regulating relief valve, a safety valve, a pressure transmitter, zone valves, and pressure switches. The makeup water pump supplies positive pressure water to the high-pressure pump. The high-pressure pump, a positive displacement piston pump, is one of the core components of the pump set; driven by a motor, it pressurizes the water to the working pressure. The pressure regulating relief valve is used to unload the system and control the system pressure, ensuring pressure stability and safety protection for the high-pressure water pump during system operation. The safety valve ensures normal system operation. The pressure transmitter detects system pressure and has a pump stop protection function. The zone valves (No. 1 and No. 2) allow simultaneous spray cooling of two transformers. The pressure switches (No. 1 and No. 2) provide signal feedback on the spray status of the two transformers.

[0086] The control cabinet is used to display voltage, current, water tank level, and system working pressure parameters in real time, and has both manual and automatic functions.

[0087] Cooling pipes and nozzles are arranged around the transformer radiator to spray the transformer for real-time cooling.

[0088] The transformer's fine water mist device has both manual and automatic operation modes. The two operation modes are described in detail below:

[0089] 1. Preparation:

[0090] First, ensure that the spray pipes of transformers #1 and #2 are connected and tightened; then, turn on the three-phase power supply. The voltmeter and ammeter indicate normal readings, the water tank level display is normal (90% to 100%), and the power indicator light is on.

[0091] 2. Manual operation:

[0092] a. Ensure the water tank is filled to 90% capacity;

[0093] b. Set the water injection solenoid valve to automatic mode;

[0094] c. Switch the main pump control, water supply pump control, and No. 1 zone valve control to manual mode;

[0095] d. First press the start button of the 1# zone valve or the start button of the 2# zone valve, or both, then press the start button of the water supply pump, and finally press the start button of the main pump. The 1# and 2# transformer nozzles will start spraying.

[0096] e. When it is necessary to stop, first press the main pump stop button, then press the water replenishment pump stop button, and finally press the stop button for 1# zone valve and 2# zone valve. The 1# and 2# transformer nozzles will then stop working.

[0097] 2) Automatic control mode:

[0098] a. Ensure the water tank is filled to 90% capacity;

[0099] b. Set the water injection solenoid valve to automatic mode;

[0100] c. Set the main pump control, water supply pump control, and No. 1 zone valve control to automatic mode;

[0101] d. Remotely send a #1 passive start signal, the #1 transformer nozzle starts spraying, and the system reports the spraying status. Remotely send a #1 passive stop signal, the #1 transformer nozzle stops spraying, and the system reports the stop status.

[0102] e. Remotely send a #2 passive start signal, the #2 transformer nozzle starts spraying, and the system reports the spraying status. Remotely send a #2 passive stop signal, the #2 transformer nozzle stops spraying, and the system reports the stop status.

[0103] f. When the system is in automatic control mode, the indicator light will remain on.

[0104] The following are precautions for using a transformer fine water mist device:

[0105] a. Please do not use this device in violation of regulations to avoid personal injury and property damage;

[0106] b. It is strictly forbidden to operate the high-pressure water pump without oil or water;

[0107] c. All valves in the system are in the normally open position (except for air raid vents).

[0108] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A smart transformer cooling system for substations, characterized in that, By combining the ambient temperature information, transformer load information, and operating environment information of the transformer, the operating status of the transformer is determined from multiple dimensions. Based on the real-time operating status of the transformer, a PID time-domain control algorithm is used to precisely cool the transformer. The intelligent cooling system includes a core communication control device and a fine water mist cooling device. The core communication control device consists of a relay controller, a DI acquisition unit, dual Ethernet, RS485, a power supply, and a CPU, and adopts a 1U standard chassis. The fine water mist cooling device includes a water tank, a pump group, a control cabinet, cooling pipes, and nozzles. The water tank, pump group, and control cabinet are integrated into one unit, with the pump group located at the bottom of the control cabinet and the water tank and control cabinet located at the top. The core communication control device obtains the active power P1, reactive power P0, and power factor of the two main transformers in the substation through the relay controller. The main transformer temperature T data is used to determine the action threshold of each main transformer load and local temperature based on the site conditions. After intelligent judgment through PID time domain control algorithm, the main transformer control relay is used to control the fine water mist cooling device on site in real time. Main transformer control relay closing judgment logic: Obtain the main transformer control relay status V0, the main transformer fine water mist discharge status V1, the main transformer temperature T, the main transformer active power P1, and the power factor. and order , The logic expression for determining the closing of the main transformer control relay is as follows: ; In the formula, V0 represents the state of the main transformer control relay (default value is 0), V1 represents the state of the main transformer's fine water mist spray (default value is 0), V2 represents the real-time main transformer temperature T, and V3 represents the apparent power of the main transformer, which is composed of the main transformer's active power P1 and power factor. Calculations show that and These are the control parameters for V2 and V3, obtained using a PID time-domain control algorithm. The discrete form of the formula is as follows: ; In the formula, This is the proportional gain coefficient, with a default value of 0. , It is the coefficient of the integral term. These are the coefficients of the differential term. and Derived from historical data of the manufacturer; When the closing logic expression is true, the core communication control device sends a passive start signal to the fine water mist cooling device on site through the main transformer control relay. After receiving the start signal, the fine water mist cooling device opens the partition valve, the water supply pump and the main pump to spray water to cool the transformer. Similarly, the logic expression for determining the tripping of the main transformer control relay is as follows: ； When the tripping logic expression is true, the core communication control device sends a passive stop signal to the fine water mist cooling device on site through the main transformer control relay. After receiving the stop signal, the fine water mist cooling device shuts down the main pump, the water supply pump, and the partition valve in sequence, and the transformer nozzles stop working. The core communication control device acquires various transformer parameters at 10-second intervals and provides passive signals to the on-site fine water mist cooling device at 30-second intervals.

2. The intelligent transformer cooling system for substations according to claim 1, characterized in that: The fine water mist cooling device uses high-pressure fine water mist technology as its core, and tap water as the medium. After being pressurized by a high-pressure water pump, the water is sprayed out in a mist form from a special nozzle. The mist moves in space in a three-dimensional manner with high-speed turbulence and rotation as follows: ； In the formula, v is the water flow velocity, and f is the vector sum of various forces acting on the water flow. It refers to the water flow density. After being sprayed out, it is fully entrained, broken, and atomized with the outside air. The fine water mist is very easy to vaporize and absorb a large amount of heat.

3. The intelligent transformer cooling system for substations according to claim 1, characterized in that: The core communication control device has both manual and automatic operation modes. Manual operation: Use the manual operation buttons on the control cabinet panel to control the main pump, water supply pump, No. 1 zone valve, No. 2 zone valve, and water supply solenoid valve; Automatic operation: Two passive signals are connected to realize automatic start and stop functions, and the operating status is fed back out as a passive signal. When transformer #1 needs cooling protection, the system receives the first set of passive signals, automatically starts the #1 partition valve, water supply pump and main pump, and feeds back the operating status of pressure switch #1 as a passive signal. When transformer #2 needs cooling protection, the system receives the second set of passive signals, automatically starts the #2 partition valve, water supply pump and main pump, and feeds back the operating status of pressure switch #2 as a passive signal.

4. The intelligent transformer cooling system for substations according to claim 2, characterized in that: The fine water mist cooling device has both manual and automatic control modes. 1) Manual control mode: a. Ensure the water tank is filled to 90% or more; b. Set the water injection solenoid valve to automatic mode; c. Switch the main pump control, water supply pump control, and No. 1 zone valve control to manual mode; d. First press the start button for 1# zone valve or 2# zone valve or both, then press the start button for the water supply pump, and finally press the start button for the main pump. The 1# and 2# transformer nozzles will then start spraying. e. When it is necessary to stop, first press the main pump stop button, then press the water supply pump stop button, and finally press the stop button for the 1# zone valve and the 2# zone valve. The 1# and 2# transformer nozzles will then stop working. 2) Automatic control mode: a. Ensure the water tank is filled to 90% or more; b. Set the water injection solenoid valve to automatic mode; c. Set the main pump control, water supply pump control, and No. 1 zone valve control to automatic mode; d. Remotely send a #1 passive start signal, the #1 transformer nozzle starts spraying, and the system reports the spraying status. Remotely send a #1 passive stop signal, the #1 transformer nozzle stops spraying, and the system reports the stop status. e. Remotely send a #2 passive start signal, the #2 transformer nozzle starts spraying, and the system reports the spraying status. Remotely send a #2 passive stop signal, the #2 transformer nozzle stops spraying, and the system reports the stop status. f. When the system is in automatic control mode, the indicator light will remain on.

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