PLC (Programmable Logic Controller) intelligent automatic regulation and control method and system for gas generator set under multiple scenes

Abstract

The invention discloses a PLC intelligent automatic regulation and control method and system for a gas generator set in multiple scenes. The method comprises the following operation steps of setting starting gas concentration, automatically pumping oil, starting a motor, opening an electromagnetic valve, quitting the motor, and starting successfully. Idle speed and rated speed are switched, the unit runs for 5 minutes at the idle speed of more than 600 revolutions, and when the oil temperature exceeds 25 DEG C, the unit is automatically switched to the rated speed; the rotating speed, the excitation, the closing and the constant power factor are automatically adjusted; jC closed-loop control is added, and automatic adjustment of the gas concentration is achieved; preconditions of automatic loading detection include normal oil temperature, normal water temperature, normal intercooling temperature, normal exhaust temperature and normal exhaust temperature difference. According to the PLC intelligent automatic regulation and control method and system for the gas generator set in the multiple scenes, the one-key starting function of the gas generator set can be simply and conveniently achieved, the gas generator set is automatically loaded to the target power for operation, and the current situations that the gas generator set is difficult to start and low in automation degree are solved.

Description

Technical Field

[0001] The present invention relates to the field of generator set control technology, and in particular to a PLC intelligent automatic control method and system for a gas generator set in multiple scenarios. Background Art

[0002] The gas generator control system is a system for starting and shutting down gas generators. The general principle of the generator control system transformation is to upgrade the control system without changing the existing system operation mode (that is, after exiting the new transformation system, the original operation mode can be directly restored). From the concentration measurement and real-time air-fuel ratio control of the unit, to the one-button start-up of the unit, grid connection, loading, and unloading, all are automated and the unit's operating status evaluation is realized. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of PLC intelligent automatic control of gas generator sets.

[0003] The existing gas generator set control has certain drawbacks when in use. First of all, the existing gas generator set control has a low degree of intelligence, and more often the unit is manually controlled, which is not conducive to people's use. In addition, the existing gas generator set is difficult to start, which brings certain adverse effects to people's use process. For this reason, we propose a PLC intelligent automatic control method and system for gas generator sets in multiple scenarios. Summary of the invention

[0004] Technical problems to be solved: In view of the shortcomings of the prior art, the present invention provides a PLC intelligent automatic control method and system for gas generator sets in multiple scenarios, which can simply and conveniently realize the one-key start function of the gas generator set and automatically load it to the target power operation, thereby solving the current situation of difficulty in starting the gas generator set and low degree of automation, and can effectively solve the problems in the background technology.

[0005] Technical solution: To achieve the above purpose, the technical solution adopted by the present invention is: a PLC intelligent automatic control method for gas generator sets in multiple scenarios, including the following operating steps: S1: Start: Set the starting gas concentration, automatically pump oil, start the motor, open the solenoid valve, the motor exits, and the start is successful; S2: Switch between idle and rated speed: Switch between idle and rated speed. When the unit idles at 600 rpm or above for 5 minutes and the oil temperature exceeds 25 degrees, it will automatically switch to the rated speed. S3: Automatic closing: automatic adjustment of speed, automatic excitation, automatic closing, and constant power factor; S4: Automatically adapt to gas concentration: Add JC closed-loop control to achieve automatic adjustment of gas concentration; S5: Automatic load increase and decrease: The preconditions for automatic load detection are that the oil temperature is normal, the water temperature is normal, the intercooler temperature is normal, the exhaust temperature is normal, the exhaust temperature difference is normal, the cylinder temperature is normal, the cylinder temperature difference is normal, the gas pressure is normal, the gas concentration is normal, and the power does not exceed the set maximum power. Automatic load reduction includes load reduction due to high oil and water temperature, high intercooler water temperature, high exhaust temperature, exhaust temperature difference, low gas pressure difference, power fluctuation, power overshoot, and large concentration change. S6: One-key stop: After clicking the one-key stop button, the unit automatically and slowly reduces the load. When the power is lower than 100KW, a trip command is issued. At the same time, the constant power switch is turned off, the excitation is turned off, and the unit switches to idle speed. After running for 5 minutes, the solenoid valve is turned off when the oil temperature is lower than 70℃. S7: Post-pre-supply function: Start the post-lubrication pump to perform post-lubrication on the unit for 10 minutes to further cool the supercharger.

[0006] As a preferred technical solution of the present application, in the step S1, the starting gas concentration is set, and a method of manual input or reading and writing the data of the pipeline system concentration meter into the LCD screen can be selected.

[0007] As a preferred technical solution of the present application, the maximum oil pumping time and the normal oil pumping pressure for automatic oil pumping in the S1 step can be set. After clicking one button, the control system outputs the oil pumping instruction to the required oil pressure, and the oil pumping is detected to be normal. The status is locked for 30-50S. It can be set that when the oil pumping time reaches the maximum oil pumping time but does not reach the required oil pumping pressure, it starts and stops, and is detected as an oil pumping failure.

[0008] As a preferred technical solution of the present application, in the step S1, the control system detects that the pump oil is normal and then proceeds to the motor output. If the motor speed exceeds 8 revolutions within 3S, it is detected that the motor engagement is normal and the motor continues to output. If the motor speed is lower than 8 revolutions within 3S, it is detected as a motor engagement failure and the start-stop is performed.

[0009] As a preferred technical solution of the present application, in the step S1, when the control system detects that the motor speed exceeds 80-100 revolutions, the solenoid valve can be set to open.

[0010] As a preferred technical solution of the present application, in the step S1, after the control system detects that the speed exceeds the starting set speed by 300 revolutions, the motor exits, wherein the speed can be set.

[0011] As a preferred technical solution of the present application, in the step S1, when the speed reaches the normal operating speed of 500 rpm, the startup is judged to be successful, wherein the speed can be set.

[0012] As a preferred technical solution of the present application, when the speed is unstable in the S3 step, the LCD screen slowly adjusts the set concentration, first in a large direction, then in a small direction, until the speed is stable, with a maximum adjustment of 3% concentration; after detecting that the speed is stable, the control system switches the excitation switch, and the excitation is normal when the voltage reaches between 9500-10500, otherwise the excitation fails, stops automatically, and sends a fault to the operator; the closing is completed by the UC2 controller and the LCD screen, and the LCD screen issues a synchronization command according to the excitation and speed preconditions, and UC2 adjusts the voltage, automatically synchronizes, and closes the switch; after closing, the control system switches the constant power factor switch and puts it into constant power factor control.

[0013] As a preferred technical solution of the present application, the PLC control system is connected to an automatic start module, an idle rated switching module, an automatic closing module, an automatic adaptation to gas concentration module, an automatic load addition and reduction module, a one-button automatic parking module and a post-pre-supply function module.

[0014] As a preferred technical solution of the present application, the automatic start module includes a gas concentration monitoring read-write module, an oil pump setting module, a motor control module, a solenoid valve control module, and a start control and judgment module; the idle rated switching module includes an oil temperature monitoring module; the automatic closing module includes an automatic speed monitoring and adjustment module, an excitation switch control module, a voltage adjustment module, an automatic closing control module and a constant power factor control module; the automatic load addition and reduction module includes an oil temperature monitoring module, a water temperature monitoring module, an intercooler temperature monitoring module, an exhaust temperature monitoring module, a cylinder temperature monitoring module, a gas pressure monitoring module, a gas concentration monitoring module and a power monitoring module.

[0015] Beneficial effects: Compared with the prior art, the present invention provides a PLC intelligent automatic control method and system for a gas generator set in multiple scenarios, which has the following beneficial effects: The PLC intelligent automatic control method and system for a gas generator set in multiple scenarios can simply and conveniently realize the one-key start function of the gas generator set, automatically load to the target power operation, and solve the current situation that the gas generator set is difficult to start and the degree of automation is low. The entire gas generator set PLC intelligent automatic control structure is simple, easy to operate, and the effect of use is better than the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the PLC intelligent automatic control method of a gas generator set in multiple scenarios of the present invention.

[0017] Figure 2 The present invention is a flow chart of the PLC intelligent automatic control method for gas generator sets in multiple scenarios.

[0018] Figure 3Schematic diagram of the PLC intelligent automatic control system of the gas generator set in multiple scenarios of the present invention. DETAILED DESCRIPTION

[0019] The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but it will be understood by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1-3 As shown in the figure, the PLC intelligent automatic control method of gas generator sets in multiple scenarios includes the following steps: S1: Start: Set the starting gas concentration, automatically pump oil, start the motor, open the solenoid valve, the motor exits, and the start is successful; S2: Switch between idle and rated speed: Switch between idle and rated speed. When the unit idles at 600 rpm or above for 5 minutes and the oil temperature exceeds 25 degrees, it will automatically switch to the rated speed. S3: Automatic closing: automatic adjustment of speed, automatic excitation, automatic closing, and constant power factor; S4: Automatically adapt to gas concentration: Add JC closed-loop control to achieve automatic adjustment of gas concentration; S5: Automatic load increase and decrease: The preconditions for automatic load detection are that the oil temperature is normal, the water temperature is normal, the intercooler temperature is normal, the exhaust temperature is normal, the exhaust temperature difference is normal, the cylinder temperature is normal, the cylinder temperature difference is normal, the gas pressure is normal, the gas concentration is normal, and the power does not exceed the set maximum power. Automatic load reduction includes load reduction due to high oil and water temperature, high intercooler water temperature, high exhaust temperature, exhaust temperature difference, low gas pressure difference, power fluctuation, power overshoot, and large concentration change. S6: One-key stop: After clicking the one-key stop button, the unit automatically and slowly reduces the load. When the power is lower than 100KW, a trip command is issued. At the same time, the constant power switch is turned off, the excitation is turned off, and the unit switches to idle speed. After running for 5 minutes, the solenoid valve is turned off when the oil temperature is lower than 70℃. S7: Post-pre-supply function: Start the post-lubrication pump to perform post-lubrication on the unit for 10 minutes to further cool the supercharger.

[0023] It can simply and conveniently realize the one-key start function of the gas generator set, automatically load to the target power operation, and solve the current situation of difficulty in starting the gas generator set and low degree of automation.

[0024] Furthermore, in step S1, the starting gas concentration is set, and a method of manually inputting or reading and writing the data of the pipeline system concentration meter into the LCD screen can be selected.

[0025] Furthermore, in step S1, the maximum oil pumping time and the normal oil pumping pressure for automatic oil pumping can be set. After clicking the one-key operation, the control system outputs the oil pumping instruction to the required oil pressure, and the oil pumping is detected to be normal. The status is locked for 30-50S. It can be set that when the oil pumping time reaches the maximum oil pumping time but does not reach the required oil pumping pressure, it starts and stops, and is detected as an oil pumping failure.

[0026] Furthermore, in step S1, the control system detects that the pump oil is normal and then proceeds with the motor output. If the motor speed exceeds 8 revolutions within 3S, it is detected that the motor engagement is normal and the motor continues to output. If the motor speed is lower than 8 revolutions within 3S, it is detected as a motor engagement failure and the start-stop is performed.

[0027] Furthermore, in step S1, the control system detects that the motor speed exceeds 80-100 revolutions, and the solenoid valve can be set to open.

[0028] Furthermore, in step S1, after the control system detects that the speed exceeds the start-up set speed by 300 revolutions, the motor exits, wherein the speed can be set.

[0029] Furthermore, in step S1, when the speed reaches the normal operating speed of 500 rpm, it is determined that the startup is successful, wherein the speed can be set.

[0030] Furthermore, when the speed is unstable in step S3, the LCD screen slowly adjusts the set concentration, first in a large direction, then in a small direction, until the speed is stable, with a maximum adjustment of 3% concentration; after detecting that the speed is stable, the control system switches the excitation switch, and the excitation is normal when the voltage reaches between 9500-10500, otherwise the excitation fails, stops automatically, and sends a fault to the operator; the closing is completed by the UC2 controller and the LCD screen, and the LCD screen issues a synchronization command according to the excitation and speed preconditions, and UC2 adjusts the voltage, automatically synchronizes, and closes the switch; after closing, the control system switches the constant power factor switch and puts it into constant power factor control.

[0031] Furthermore, the PLC control system is connected to an automatic start module, an idle rated switching module, an automatic closing module, an automatic adaptation to gas concentration module, an automatic load increase and decrease module, a one-button automatic parking module and a post-pre-supply function module.

[0032] Furthermore, the automatic start module includes a gas concentration monitoring read-write module, an oil pump setting module, a motor control module, a solenoid valve control module, a start control and judgment module, the idle rated switching module includes an oil temperature monitoring module, the automatic closing module includes an automatic speed monitoring and adjustment module, an excitation switch control module, a voltage adjustment module, an automatic closing control module and a constant power factor control module, and the automatic load addition and reduction module includes an oil temperature monitoring module, a water temperature monitoring module, an intercooler temperature monitoring module, an exhaust temperature monitoring module, a cylinder temperature monitoring module, a gas pressure monitoring module, a gas concentration monitoring module and a power monitoring module.

[0033] Control system transformation The automation transformation including full automation of related one-key operation and automatic activation and deactivation of related signals is mainly achieved by adding a PLC control system.

[0034] Manual operation contents of carding unit 1) Start operation 1. Regulate the current or start the AC power supply.

[0035] 2. Set the starting concentration.

[0036] 3. Pump oil before starting. Use an oil circulation pump to pump oil. The oil pressure before starting (kPa) = (120-oil temperature).

[0037] 4. Click the start button. After about 1 second, the motor will rotate. If you only hear the sound of the motor's top gear, but no rotation or speed, release the button and click it again. Or stop the power supply and manually fluctuate the motor gears, then supply power and click the start button again.

[0038] 5. When the motor rotates for 2-3 seconds or the speed reaches 80-100 rpm, open the solenoid valve.

[0039] 6. Release the start button after the starting speed reaches 300 rpm. If the unit reaches 500 rpm, the start is successful, otherwise it is a start failure.

[0040] 2) Idle speed 1. After starting, pay attention to the oil temperature, water temperature, and oil pressure. When the oil temperature is below 20 degrees, the rated speed must not be reached.

[0041] 2. The rated speed is allowed only after running at idle speed for at least 5 minutes.

[0042] 3) Closing 1. When the oil temperature is below 40 degrees, the load shall not be closed. When the load is large, the oil temperature shall not be lower than 50 degrees. The oil pressure shall not be lower than 0.300MPa at any time.

[0043] 2. The oil pressure difference before and after filtration shall not exceed 0.15MPa.

[0044] 3. Adjust the speed to stabilize. When adjusting the speed, try to adjust it to a thicker level. If you need to dilute it, adjust the data to the valve close to 2 or 1, and then properly shut off some gas to reduce the gas pressure until the speed stabilizes.

[0045] 4. Magnetize (turn the excitation / demagnetization switch to the open position. At this time, you must pay attention to the constant power factor switch being in the off position).

[0046] 5. Adjust the voltage. Turn the AVR adjustment switch to adjust the generator voltage to about 0.1 higher than the mains voltage.

[0047] 6. Close the switch and connect to the grid. Set the power to 60-100KW.

[0048] 4) Run and load 1. After closing the circuit breaker, turn the constant power switch to the open position.

[0049] 2. When loaded to 320KW, the LCD screen is put into JC closed loop to automatically adapt to changes in gas concentration and pressure.

[0050] 3. When the engine is operating normally, the maximum water outlet temperature should not be higher than 85℃.

[0051] 4. The low-temperature circulating water temperature should not exceed 45°C and should not be lower than 15°C.

[0052] 5. The engine oil temperature is not higher than 85℃.

[0053] 6. The oil pressure after filtration should be within the range of 0.350~0.600MPa.

[0054] 7. In addition to replacing the filter element according to maintenance requirements, the oil pressure difference generally does not exceed about 0.15MPa.

[0055] 8. The exhaust temperature is generally below 650 degrees.

[0056] 9. After the power is loaded to 320KW, the exhaust temperature difference is less than 100 degrees.

[0057] 5) Unit shutdown 1. After the load is reduced to about 100KW.

[0058] 2. Turn the "Constant Power Factor" switch to the off position.

[0059] 3. Press the opening button.

[0060] 4. Demagnetize after opening the gate, and set the excitation / demagnetization switch to the demagnetization position.

[0061] 5. Run at idle speed and turn the idle / rated switch to the idle position.

[0062] 6. Run at idle speed for at least 10 minutes. After stopping, close the solenoid valve in time (or cut off the manual valve).

[0063] One-click operation scheme Automatically operate the sorted manual operations one by one 1) Start (pump oil to run to idle speed) 1. Set the starting gas concentration The data can be input manually or read from the pipeline system concentration meter into the LCD screen for reading and writing.

[0064] 2. Automatic oil pump Set the longest pumping time (adjustable), and set the normal pumping pressure (adjustable).

[0065] After clicking the one-button operation, the control system outputs the oil pumping instruction to the required oil pressure, and the oil pumping is detected as normal (the state is locked for 30-50S (settable)); when the oil pumping time reaches the maximum oil pumping time but does not reach the required oil pumping pressure, it starts and stops, and it is detected as an oil pumping failure 3. Start the motor The control system detects that the pump oil is normal and then the motor outputs. If the motor speed exceeds 8 revolutions within 3S, it is detected that the motor is engaged normally and the motor continues to output; if the motor speed is less than 8 revolutions within 3S, it is detected as a motor engagement failure and the start-up stops.

[0066] 4. Open the solenoid valve The control system detects that the motor speed exceeds 80-100 rpm (adjustable), and the solenoid valve opens.

[0067] 5. Motor exit When the control system detects that the speed exceeds the starting set speed by 300 rpm (settable), the motor exits.

[0068] 6. Startup Successfully When the speed reaches the normal operating speed of 500 rpm (settable), the startup is considered successful.

[0069] 2) Idle speed / rated speed 1. Switch idle / rated speed When the unit idles at 600 rpm or above for 5 minutes and the oil temperature exceeds 25 degrees, it will automatically switch to the rated speed.

[0070] 3) Automatic closing 1. Automatically adjust the speed When the speed is unstable, the LCD screen slowly adjusts the set concentration, first in a large direction, then in a small direction, until the speed stabilizes. The maximum adjustment amount is 3% concentration.

[0071] 2. Automatic excitation After the speed is detected to be stable, the control system switches the excitation switch. When the voltage reaches between 9500-10500, the excitation is normal, otherwise the excitation fails. It stops automatically and sends a fault to the operator.

[0072] 3. Automatic closing The closing is completed by the cooperation of the UC2 controller and the LCD screen. The LCD screen issues a synchronization command based on the excitation and speed preconditions. UC2 adjusts the voltage, automatically synchronizes, and closes the circuit breaker.

[0073] 4. Constant power factor After closing the circuit breaker, the control system switches to the constant power factor switch and puts the circuit breaker into constant power factor control.

[0074] 4) Automatically adapt to gas concentration Add JC closed-loop control to achieve automatic adjustment of gas concentration.

[0075] 5) Automatic load increase and decrease The preconditions for automatic loading detection are as follows: 1. Oil temperature is normal 2. Water temperature is normal 3. Intercooler temperature is normal 4. Exhaust temperature is normal 5. Exhaust temperature difference is normal 6. Cylinder temperature is normal 7. The cylinder temperature difference is normal 8. Gas pressure is normal 9. Gas concentration is normal 10. The power does not exceed the set maximum power Automatic load shedding is as follows: 1. Reduce load when oil and water temperature is high 2. Load reduction when the intercooler water temperature is high 3. High exhaust temperature load reduction 4. Exhaust temperature difference to reduce load 5. Load reduction due to low gas pressure difference 6. Power Fluctuation Load Reduction 7. Reduce load when power overshoots.

[0076] 8. Large load shedding due to concentration changes 6) One-click parking After clicking the one-key stop button, the unit automatically and slowly reduces the load. When the power is less than 100KW, a trip command is issued, and the constant power switch is turned off at the same time, the excitation is turned off, and the unit switches to idle speed. After running for 5 minutes, the solenoid valve is turned off when the oil temperature is less than 70℃.

[0077] 7) Post-pre-supply function When the unit shuts down normally or due to a fault, start the rear lubrication pump to lubricate the unit for 10 minutes to further cool the supercharger.

[0078] In summary, the one-key start function of the gas generator set can be realized simply and conveniently, and it can be automatically loaded to the target power for operation.

[0079] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0080] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. The PLC intelligent automatic control method of gas generator sets in multiple scenarios is characterized by: The steps include: S1: Start: Set the starting gas concentration, automatically pump oil, start the motor, open the solenoid valve, the motor exits, and the start is successful; S2: Switch between idle and rated speed: Switch between idle and rated speed. When the unit idles at 600 rpm or above for 5 minutes and the oil temperature exceeds 25 degrees, it will automatically switch to the rated speed. S3: Automatic closing: automatic adjustment of speed, automatic excitation, automatic closing, and constant power factor; S4: Automatically adapt to gas concentration: Add JC closed-loop control to achieve automatic adjustment of gas concentration; S5: Automatic load increase and decrease: The preconditions for automatic load detection are that the oil temperature is normal, the water temperature is normal, the intercooler temperature is normal, the exhaust temperature is normal, the exhaust temperature difference is normal, the cylinder temperature is normal, the cylinder temperature difference is normal, the gas pressure is normal, the gas concentration is normal, and the power does not exceed the set maximum power. Automatic load reduction includes load reduction due to high oil and water temperature, high intercooler water temperature, high exhaust temperature, exhaust temperature difference, low gas pressure difference, power fluctuation, power overshoot, and large concentration change. S6: One-key stop: After clicking the one-key stop button, the unit automatically and slowly reduces the load. When the power is lower than 100KW, a trip command is issued. At the same time, the constant power switch is turned off, the excitation is turned off, and the unit switches to idle speed. After running for 5 minutes, the solenoid valve is turned off when the oil temperature is lower than 70℃. S7: Post-pre-supply function: Start the post-lubrication pump to perform post-lubrication on the unit for 10 minutes to further cool the supercharger.

2. The PLC intelligent automatic control method for gas generator sets in multiple scenarios according to claim 1 is characterized in that: In the step S1, the starting gas concentration is set, and a method of manual input or reading and writing the data of the pipeline system concentration meter into the LCD screen can be selected.

3. The PLC intelligent automatic control method for gas generator sets in multiple scenarios according to claim 1 is characterized in that: In the step S1, the maximum oil pumping time and the normal oil pumping pressure for automatic oil pumping can be set. After clicking the one-key operation, the control system outputs the oil pumping instruction to the required oil pressure, and the oil pumping is detected to be normal. The status is locked for 30-50S. It can be set that when the oil pumping time reaches the maximum oil pumping time but does not reach the required oil pumping pressure, it starts and stops, and is detected as an oil pumping failure.

4. The PLC intelligent automatic control method for gas generator sets in multiple scenarios according to claim 1 is characterized in that: In the step S1, the control system detects that the pump oil is normal and then proceeds to the motor output. If the motor speed exceeds 8 revolutions within 3S, it is detected that the motor engagement is normal and the motor continues to output. If the motor speed is lower than 8 revolutions within 3S, it is detected that the motor engagement fails and the start-stop is performed.

5. The PLC intelligent automatic control method for gas generator sets in multiple scenarios according to claim 1 is characterized in that: In the step S1, the control system detects that the motor speed exceeds 80-100 revolutions, and the solenoid valve can be set to open.

6. The PLC intelligent automatic control method for gas generator sets in multiple scenarios according to claim 1 is characterized in that: In the step S1, after the control system detects that the speed exceeds the start-up set speed by 300 revolutions, the motor exits, wherein the speed can be set.

7. The multi-scenario PLC intelligent automatic control method for gas generator sets according to claim 1 is characterized in that: In the step S1, the speed reaches the normal operating speed of 500 rpm, and the startup is judged to be successful, wherein the speed can be set.

8. The PLC intelligent automatic control method for gas generator sets in multiple scenarios according to claim 1 is characterized in that: When the speed is unstable in the S3 step, the LCD screen slowly adjusts the set concentration, first in a large direction, then in a small direction, until the speed is stable, with a maximum adjustment of 3% concentration; after detecting that the speed is stable, the control system switches the excitation switch, and the excitation is normal when the voltage reaches between 9500-10500, otherwise the excitation fails, stops automatically, and sends a fault to the operator; the closing is completed by the UC2 controller and the LCD screen, and the LCD screen issues a synchronization command according to the excitation and speed preconditions, and UC2 adjusts the voltage, automatically synchronizes, and closes the switch; after closing, the control system switches the constant power factor switch and puts it into constant power factor control.

9. The PLC intelligent automatic control system for gas generator sets in multiple scenarios includes a PLC control system, which is characterized by: The PLC control system is connected to an automatic start module, an idle rated switching module, an automatic closing module, an automatic adaptation to gas concentration module, an automatic load increase and decrease module, a one-button automatic parking module and a rear pre-supply function module.

10. The multi-scenario PLC intelligent automatic control system for gas generator sets according to claim 9 is characterized in that: The automatic start module includes a gas concentration monitoring read-write module, an oil pump setting module, a motor control module, a solenoid valve control module, and a start control and judgment module. The idle rated switching module includes an oil temperature monitoring module. The automatic closing module includes an automatic speed monitoring and adjustment module, an excitation switch control module, a voltage adjustment module, an automatic closing control module and a constant power factor control module. The automatic load addition and reduction module includes an oil temperature monitoring module, a water temperature monitoring module, an intercooler temperature monitoring module, an exhaust temperature monitoring module, a cylinder temperature monitoring module, a gas pressure monitoring module, a gas concentration monitoring module and a power monitoring module.

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