Methanol Range Extender Parallel Power Generation System and Control Method Based on Dynamic Master-Slave Coordination

Abstract

This invention relates to the field of power generation technology, and particularly to a methanol range extender parallel power generation system and control method based on dynamic master-slave coordination. The system includes several methanol range extenders, an energy storage device, a conversion device, a comprehensive management device, a remote load monitoring device, and an environmental monitoring device connected in parallel. The comprehensive management device regulates the methanol range extenders, energy storage device, and conversion device based on data from the methanol range extenders, energy storage device, remote load monitoring device, and environmental monitoring device, realizing coupled power generation between the methanol range extenders and energy storage device. A method based on the above system is also disclosed. Employing the aforementioned methanol range extender parallel power generation system and control method based on dynamic master-slave coordination, the system achieves efficient coordination of multiple methanol range extenders through the coupled operation of multiple methanol range extenders and energy storage device, and adjusts the operation according to the actual operating environment, while avoiding the lifespan degradation caused by long-term high-load operation of a single unit.

Description

Technical Field

[0001] This invention relates to the field of power generation technology, and in particular to a methanol range extender parallel power generation system and control method based on dynamic master-slave coordination. Background Technology

[0002] Currently, drilling power systems primarily utilize diesel power, which suffers from high energy consumption, significant pollution, high fuel costs, complex operation and maintenance, and poor power supply stability, hindering the stable operation of precision equipment. Drilling rigs operate at full power (drilling mode) for only 1 / 4 of their total operating time, while auxiliary operations (such as no-load operation, drill retraction, and rod changing) account for 3 / 4. Full-power operation results in high energy consumption, with auxiliary operation powering approximately 1 / 3 of the total power. This non-periodic intermittent load places high demands on the flexibility and adaptability of the power generation system. Furthermore, the drilling environment is complex, especially at high altitudes and low temperatures, where traditional systems exhibit low efficiency and unstable output, impacting overall operational effectiveness. Summary of the Invention

[0003] The purpose of this invention is to provide a methanol range extender parallel power generation system and control method based on dynamic master-slave collaboration, so as to solve the problems of high energy consumption, high pollution, poor adaptability and unstable output in high altitude and low temperature environments of existing diesel power systems.

[0004] To achieve the above objectives, the present invention provides a methanol range extender parallel power generation system based on dynamic master-slave collaboration, characterized in that it includes several methanol range extenders, energy storage devices, conversion devices, integrated management devices, remote load monitoring devices, and environmental monitoring devices arranged in parallel. The remote load monitoring device communicates with the monitoring components on the load to obtain load operation data; several parallel methanol range extenders and energy storage devices are connected to the load through a conversion device, and the several parallel methanol range extenders are all connected to the energy storage devices for power supply to the load. The methanol range extender, energy storage device, conversion device, remote load monitoring device, and environmental monitoring device all communicate with the integrated management device. The integrated management device determines the operating mode based on the data from the energy storage device and the remote load monitoring device, and corrects and regulates the methanol range extender based on the environmental data collected by the environmental monitoring device; thus realizing the coupling and power generation of several methanol range extenders and energy storage devices.

[0005] Preferably, several methanol range extenders are connected to a methanol tank, which is equipped with a level sensor. Each methanol range extender includes a housing and a range extender controller housed within the housing. A methanol engine and a generator are connected to each other within the housing. The methanol engine and generator are each equipped with an engine controller and a generator controller, respectively. The methanol engine is equipped with an air cooling fan and a preheater, which are connected to the engine controller. Both the engine controller and the generator controller communicate with the range extender controller. Several range extender controllers and level sensors communicate with the integrated management unit.

[0006] Preferably, the energy storage device includes an energy storage cabinet, which contains a plurality of energy storage modules and a battery management module. Each of the energy storage modules is equipped with an energy storage temperature sensor, and a heat dissipation cavity is provided between adjacent energy storage modules. Cooling pipes are provided in the heat dissipation cavity, and the plurality of energy storage modules and the energy storage temperature sensor are all connected to the battery management module. Several range extender controllers communicate with the battery management module.

[0007] Preferably, the cooling pipe is connected to a liquid cooling pipe and a methanol pipe; The inlet of the cooling pipe is connected to one end of the methanol pipe, and the other end of the methanol pipe is connected to the outlet pipe of the methanol tank. The outlet of the cooling pipe and the outlet pipe of the methanol tank are both connected to the fuel inlet of the methanol range extender. The outlet pipe of the methanol tank is equipped with a feed pump. The inlet and outlet of the cooling pipe are connected to both ends of the liquid cooling pipe, and a circulation pump is installed on the liquid cooling pipe. The feed pump and circulation pump communicate with the integrated management unit.

[0008] Preferably, the conversion device includes a DC / DC conversion module and at least one inverter, wherein the DC / DC conversion module is connected to the inverter and the inverter is connected to the load; The inverter communicates with the integrated management unit.

[0009] Preferably, the load operation data includes real-time load power and predicted load power; The environmental monitoring device includes an ambient temperature sensor and an ambient altitude sensor, which are used to detect ambient temperature and altitude, respectively, and communicate with the integrated management device.

[0010] Based on the above-mentioned control method for a methanol range extender parallel power generation system based on dynamic master-slave cooperation, the specific steps are as follows: Step S1: Set the priority of several methanol range extenders. The range extender controller in the methanol range extender that starts first is the master controller, and the range extender controllers of other methanol range extenders are slave controllers. Perform calibration tests on the engine to obtain the optimal fixed speed mapping table for methanol engines with different power outputs. Step S2: The integrated management device acquires load operation data, energy storage device charge status, and environmental data; Step S3: Determine the operating mode based on load operation data and the charge status of the energy storage device; adjust the methanol range extender based on environmental data; and calculate the environmental correction coefficient based on the environmental data. Step S4: Calculate the number of methanol range extenders to be started and their output power based on the environmental correction factor and operating mode; Step S5: Based on the output power, look up the table to obtain the optimal fixed speed of the methanol engine, and obtain the control strategy. The control strategy includes the operating mode, the number of methanol range extenders started, the output power of the methanol range extenders, and the optimal fixed speed of the methanol engine. Step S6: According to the control strategy, the methanol range extender is coupled with the energy storage device to generate electricity. The electrical energy is converted into the required electrical energy to power the load.

[0011] Preferably, in step S3, the operating modes include pure electric discharge, hybrid charging, and hybrid discharge; Pure electric discharge refers to the discharge of only the energy storage device, under the following conditions: and ; in, for The charge state of the energy storage device at all times. Set the value for the first charge state; This represents the maximum discharge power of the energy storage device. The power required by the load; Hybrid charging uses the methanol range extender to generate electricity and the energy storage device to charge, under the following conditions: ; in, Set the value for the second charge state; Hybrid discharge generates electricity from the methanol range extender. The energy storage device discharges or charges based on the difference between the total power generated by the activated methanol range extender and the load power, under the following conditions: and ; in, Set the value for the third charge state; Furthermore, to prevent oscillation, a first charge state return value and a first charge state return value are provided.

[0012] Preferably, in step S3, the following adjustments are made based on the ambient temperature: When the ambient temperature is higher than the first lower limit set temperature but lower than the first upper limit set temperature, methanol fuel directly enters the methanol range extender for combustion and power generation. At this time, the temperature correction coefficient is 1. When the ambient temperature is lower than the first lower limit set temperature and higher than the second lower limit set temperature, the preheater is started by providing electrical energy through the energy storage device. After a set time, the methanol fuel enters the methanol range extender through the cooling pipe. The methanol fuel is preheated by the waste heat of the energy storage device and then preheated again by the preheater before entering the methanol range extender. At this time, the temperature correction coefficient is 1. When the ambient temperature is lower than the second lower limit set temperature, the methanol fuel enters the methanol range extender after preliminary waste heat preheating and secondary preheating in the preheater. At this time, the temperature correction coefficient is 0.8. When the ambient temperature is higher than the first upper limit set temperature but lower than the second upper limit set temperature, the air cooling fan is activated, and the methanol fuel directly enters the methanol range extender for combustion and power generation. At this time, the temperature correction coefficient is 1. When the ambient temperature is higher than the second upper limit set temperature, the air cooling fan will be activated, with a temperature correction factor of 0.8. In step S3, the following adjustments are made based on the ambient altitude: When the altitude is higher than the set value, the power of the feed pump is increased to the set value to increase the methanol-air mixing ratio; and the altitude correction factor is calculated using the following formula: ; in, This is the altitude correction factor. Altitude correction factor This is the difference between the altitude and the set value. When the altitude exceeds the upper limit (5000m), Take 0.5; The formula for calculating the environmental correction factor is as follows: ; in, This is the environmental correction factor. This is the temperature correction factor.

[0013] Preferably, in pure electric discharge mode, the number of methanol range extenders started is zero, and the output power is zero; The formula for calculating the number of methanol range extenders activated in hybrid charging mode is as follows: ; in, For the number of launches, The charging coefficient of the energy storage device. This represents the maximum charging power of the energy storage device. This represents the range-extending load factor for methanol. This represents the maximum output power for methanol range extension. It is a rounding function; Output power of methanol range extender The calculation formula is as follows: ; The formula for calculating the number of methanol range extenders started in hybrid discharge mode is as follows: ; Output power of methanol range extender The calculation formula is as follows: ; in, This is the optimal output power proportional coefficient.

[0014] Therefore, the present invention adopts the above-mentioned methanol range extender parallel power generation system and control method based on dynamic master-slave collaboration, which has the following beneficial effects: by coupling multiple methanol range extenders with energy storage devices and adjusting them according to the actual operating environment, efficient collaboration of multiple methanol range extenders is achieved, while avoiding the lifespan degradation caused by long-term high-load operation of a single unit. On the one hand, by switching between pure electric discharge, hybrid charging and hybrid discharge modes, the rapid response characteristics of energy storage are fully utilized, reducing the start-stop frequency and load fluctuation of the range extenders; on the other hand, the waste heat of the energy storage module is used to preheat methanol fuel through cooling pipes, reducing the power consumption of the preheater and realizing energy recovery and utilization.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a methanol range extender parallel power generation system based on dynamic master-slave collaboration according to the present invention; Figure 2 This is a schematic diagram of a methanol range extender. Figure 3 This is a schematic diagram of the energy storage device structure; Figure 4 This is a flowchart of the method of the present invention; Figure 5 The image shows the engine calibration test results.

[0017] Figure Labels 1. Methanol range extender; 11. Housing; 12. Range extender controller; 13. Methanol engine; 14. Generator; 15. Engine controller; 16. Generator controller; 17. Air cooling fan; 18. Preheater; 2. Energy storage device; 21. Energy storage module; 22. Battery management module; 23. Cooling pipes. Detailed Implementation

[0018] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] like Figure 1 As shown, a methanol range extender 1 parallel power generation system based on dynamic master-slave collaboration includes several methanol range extenders 1, energy storage devices 2, conversion devices, integrated management devices, remote load monitoring devices, and environmental monitoring devices arranged in parallel.

[0021] The remote load monitoring device communicates with the monitoring components on the load to obtain load operation data. Several parallel methanol range extenders 1 and energy storage devices 2 are connected to the load through a conversion device, and each of the parallel methanol range extenders 1 is connected to the energy storage device 2 for power supply to the load.

[0022] Several methanol range extenders 1 are connected to a methanol tank, which is equipped with a level sensor to detect the fuel level. For example... Figure 2As shown, the methanol range extender 1 includes a housing 11 and a range extender controller 12 disposed within the housing 11. A methanol engine 13 and a generator 14 are disposed within the housing 11 and connected to each other. The methanol engine 13 and the generator 14 are respectively equipped with an engine controller 15 and a generator controller 16. The methanol engine 13 is equipped with an air cooling fan 17 and a preheater 18, which are connected to the engine controller 15. The engine controller 15 and the generator controller 16 communicate with the range extender controller 12. Several range extender controllers 12 and a liquid level sensor communicate with an integrated management device. The main controller is started first by multiple range extender controllers 12, and the others are started sequentially according to a set priority.

[0023] The methanol range extender 1, energy storage device 2, conversion device, remote load monitoring device, and environmental monitoring device all communicate with the integrated management device. The integrated management device regulates the methanol range extender 1, energy storage device 2, and conversion device based on the data from the methanol range extender 1, energy storage device 2, remote load monitoring device, and environmental monitoring device, thereby enabling several methanol range extenders 1 and energy storage devices 2 to couple and generate electricity.

[0024] like Figure 3 As shown, the energy storage device 2 is equipped with several energy storage modules 21 and a battery management module 22. Each energy storage module 21 is equipped with an energy storage temperature sensor. Both the energy storage modules 21 and the energy storage temperature sensor are connected to the battery management module 22. Several range extender controllers 12 communicate with the battery management module 22.

[0025] To demonstrate the heat dissipation of the energy storage module 21, a heat dissipation cavity is provided between adjacent energy storage modules 21. A cooling pipe 23 is provided inside the heat dissipation cavity, and the cooling pipe 23 is connected to a liquid cooling pipe and a methanol pipe.

[0026] The inlet of cooling pipe 23 is connected to one end of a methanol pipe, and the other end of the methanol pipe is connected to the outlet pipe of the methanol tank. Both the outlet of cooling pipe 23 and the outlet pipe of the methanol tank are connected to the fuel inlet of the methanol range extender 1. A feed pump is installed on the outlet pipe of the methanol tank. Preliminary preheating of the methanol fuel can be achieved through cooling pipe 23. The inlet and outlet of cooling pipe 23 are connected to both ends of a liquid cooling pipe, which is equipped with a circulation pump. Cooling pipe 23 can be configured with a double S-shaped arrangement to prevent interference between the coolant and methanol fuel. The feed pump and circulation pump communicate with the integrated management unit.

[0027] The conversion device includes a DC / DC conversion module and at least one inverter. The DC / DC conversion module is connected to the inverter, the inverter is connected to the load, and the inverter communicates with the integrated management device to realize the conversion between DC and DC and between DC and AC, adapting to different load requirements.

[0028] The load operation data includes real-time load power and predicted load power. The methanol range extender 1 is adjusted based on the real-time load power, or it can be adjusted in advance based on the predicted load power.

[0029] The environmental monitoring device includes an ambient temperature sensor and an ambient altitude sensor, which are used to detect ambient temperature and altitude, respectively, and communicate with the integrated management device.

[0030] like Figure 4 As shown, the control method for a methanol range extender 1 parallel power generation system based on dynamic master-slave cooperation, as described above, includes the following specific steps: Step S1: Set the priority of the four methanol range extenders 1 (the priority of the four methanol range extenders 1 decreases sequentially). The range extender controller 12 of the first methanol range extender 1 to start is the master controller, and the range extender controllers 12 of the other methanol range extenders 1 are slave controllers. If the master controller fails, one of the slave controllers will switch to become the master controller. Dynamic master-slave collaboration realizes dynamic master-slave collaborative control, such as... Figure 5 As shown, calibration tests were performed on the engine to obtain the optimal fixed speed mapping table for methanol engines 13 with different power outputs.

[0031] The optimal fixed speed mapping table for the methanol engine 13 in this embodiment is shown in Table 1.

[0032] Table 1. Optimal Fixed Speed ​​Mapping Table for 13-Power Methanol Engine

[0033] Step S2: The integrated management device acquires load operation data, the charge status of energy storage device 2, and environmental data.

[0034] Step S3: Determine the operating mode based on the load operation data and the charge status of the energy storage device 2, adjust the methanol range extender 1 according to the environmental data, and calculate the environmental correction coefficient based on the environmental data.

[0035] The operating modes include pure electric discharge, hybrid charging, and hybrid discharge.

[0036] Pure electric discharge involves only energy storage device 2 discharging, achieving zero-emission and silent operation, and fully utilizing battery energy storage, under the following conditions: and ; in, for The charge state of energy storage device 2 at all times. Set the first charge state value (90%, return value is 85%). This represents the maximum discharge power of energy storage device 2. The power required by the load.

[0037] Hybrid charging generates electricity for the methanol range extender 1 and charges the energy storage device 2, simultaneously supplying power to the low-charge battery and extending the system's range. The conditions are as follows: ; in, Set the second charge state value (50%, return value 85%). Hybrid discharge generates electricity for methanol range extender 1. Energy storage device 2 discharges or charges based on the difference between the total power generated by methanol range extender 1 and the load power. Energy storage device 2 plays a role in valley filling or peak shaving, enabling methanol range extender 1 to operate in the optimal power generation state, under the following conditions: and ; in, Set the value for the third charge state (70%, return value is 50%). It also has a return value set to form a hysteresis loop and prevent oscillation.

[0038] Adjustments will be made based on the ambient temperature as follows: When the ambient temperature is higher than the first lower limit set temperature (10 degrees Celsius) and lower than the first upper limit set temperature (30 degrees Celsius), the methanol fuel directly enters the methanol range extender 1 for combustion and power generation. At this time, the temperature correction coefficient is 1.

[0039] When the ambient temperature is lower than the first lower limit set temperature (10 degrees Celsius) and higher than the second lower limit set temperature (0 degrees Celsius), the energy storage device 2 provides electrical energy to start the preheater 18. After a set time, the methanol fuel enters the methanol range extender 1 through the cooling pipe 23. The methanol fuel is preheated by the waste heat of the energy storage device 2, and then preheated again by the preheater 18 before entering the methanol range extender 1. At this time, the temperature correction coefficient is 1.

[0040] When the ambient temperature is lower than the second lower limit set temperature (0 degrees Celsius), the methanol fuel enters the methanol range extender 1 after preliminary waste heat preheating and secondary preheating by preheater 18. At this time, the temperature correction coefficient is 0.8.

[0041] When the ambient temperature is higher than the first upper limit setting temperature (30 degrees Celsius) and lower than the second upper limit setting temperature (50 degrees Celsius), the air cooling fan 17 is started, and the methanol fuel directly enters the methanol range extender 1 for combustion and power generation. At this time, the temperature correction coefficient is 1.

[0042] When the ambient temperature is higher than the second upper limit set temperature (50 degrees Celsius), the air cooling fan 17 is activated, with a temperature correction factor of 0.8.

[0043] The following adjustments will be made based on the ambient altitude: When the altitude is lower than the set value (2000m), the altitude correction factor is 1; When the altitude is higher than the set value (2000m), increase the power of the feed pump to the set value to increase the methanol-air mixing ratio; and the altitude correction factor is calculated using the following formula: ; in, This is the altitude correction factor. As an altitude correction factor, the power of methanol range extender 1 decreases by 2% for every 1000m increase in altitude. This is the difference between the altitude and the set value. When the altitude exceeds the upper limit (5000m), Use 0.5 to avoid overcorrection.

[0044] The formula for calculating the environmental correction factor is as follows: ; in, This is the environmental correction factor. This is the temperature correction factor.

[0045] Step S4: Calculate the number of methanol range extenders 1 to be started and their output power based on the environmental correction factor and operating mode. In pure electric discharge mode, the number of methanol range extenders 1 to be started is zero, and the output power is zero; In hybrid charging mode, the formula for calculating the number of methanol range extenders 1 activated is as follows: ; in, For the number of launches, The charging coefficient of energy storage device 2, This is the maximum charging power for energy storage device 2. The range extension load factor for methanol is 50%. This represents the maximum output power for methanol range extension. It is a rounding function; Output power of methanol range extender 1 The calculation formula is as follows: ; The formula for calculating the number of methanol range extenders 1 to be started in hybrid discharge mode is as follows: ; Output power of methanol range extender 1 The calculation formula is as follows: ; The optimal output power ratio (80%). The remaining power is provided by the energy storage device 2 or absorbs excess generated energy.

[0046] Step S5: Based on the output power, look up the table to obtain the optimal fixed speed of the methanol engine 13, and obtain the control strategy. The control strategy includes the operating mode, the number of methanol range extenders 1 started, the output power of methanol range extenders 1, and the optimal fixed speed of methanol engine 13.

[0047] Step S6: According to the control strategy, the methanol range extender 1 is coupled with the energy storage device 2 to generate electricity. The electrical energy is converted into the required electrical energy to power the load.

[0048] To verify the superiority of the technical solution in this embodiment, a simulation module was used to simulate the following scenario: a drilling rig (comprising four 30kW motors, totaling approximately 120kW; a mud system consisting of an automatic mud mixing system, a solid phase control system, and a waste mud treatment system, totaling approximately 30kW; and a robotic arm of approximately 5kW; the entire system is designed to have a stable output power of no less than 180kW) performs a lifting operation, with the load increasing from 50kW to 100kW and then decreasing to 30kW. The battery's initial SOC was 80%.

[0049] Methanol range extender 1: rated power 60kW, generator 14 (permanent magnet synchronous generator 14) rated voltage 614VDC; energy storage device 2: nominal voltage 614.4V; Altitude parameters: 1000m, 2500m, 3000m; Ambient temperature parameters: -10 degrees Celsius, 0 degrees Celsius, 25 degrees Celsius, 60 degrees Celsius.

[0050] The simulation results are as follows: The results for normal temperature and low altitude (25 degrees Celsius, 1000m) are shown in Table 2, with an environmental correction factor of 1.

[0051] Table 2 Simulation results at normal temperature and low altitude

[0052] The results for low temperature and high altitude (minus 10 degrees Celsius, 3000m) are shown in Table 3, with an environmental correction factor of 0.8. 0.98 = 0.784.

[0053] Table 3 Results at low temperatures and high altitudes

[0054] Even in low-temperature, high-altitude environments, this system can operate efficiently, achieving efficient collaboration among multiple methanol range extenders 1 while avoiding lifespan degradation caused by long-term high-load operation of a single unit. The coupled operation of the energy storage device 2 and the methanol range extender 1, on the one hand, utilizes the rapid response characteristics of energy storage by switching between pure electric discharge, hybrid charging, and hybrid discharge modes (although pure electric and hybrid charging were not triggered in this scenario, the SOC was always maintained within a reasonable range of 70%-80%), reducing the start-stop frequency and load fluctuation of the methanol range extender 1; on the other hand, the waste heat of the energy storage module 21 preheats the methanol fuel through the cooling pipe 23, reducing the power consumption of the preheater 18 and achieving energy recovery and utilization.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A methanol range extender parallel power generation system based on dynamic master-slave collaboration, characterized in that: It includes several methanol range extenders, energy storage devices, conversion devices, integrated management devices, remote load monitoring devices, and environmental monitoring devices arranged in parallel; The remote load monitoring device communicates with the monitoring components on the load to obtain load operation data; several parallel methanol range extenders and energy storage devices are connected to the load through a conversion device, and the several parallel methanol range extenders are all connected to the energy storage devices for power supply to the load. The methanol range extender, energy storage device, conversion device, remote load monitoring device, and environmental monitoring device all communicate with the integrated management device. The integrated management device determines the operating mode based on the data from the energy storage device and the remote load monitoring device, and corrects and regulates the methanol range extender based on the environmental data collected by the environmental monitoring device. Achieve power generation by coupling several methanol range extenders with energy storage devices.

2. The methanol range extender parallel power generation system based on dynamic master-slave collaboration according to claim 1, characterized in that: Several methanol range extenders are connected to a methanol tank, which is equipped with a level sensor. Each methanol range extender includes a housing and a range extender controller housed within the housing. The housing also houses a connected methanol engine and a generator. The methanol engine and generator are each equipped with an engine controller and a generator controller, respectively. The methanol engine is equipped with an air cooling fan and a preheater, which are connected to the engine controller. Both the engine controller and the generator controller communicate with the range extender controller. Several range extender controllers and level sensors communicate with the integrated management unit.

3. The methanol range extender parallel power generation system based on dynamic master-slave collaboration according to claim 2, characterized in that: The energy storage device includes an energy storage cabinet, which contains several energy storage modules and a battery management module. Each energy storage module is equipped with an energy storage temperature sensor, and a heat dissipation cavity is provided between adjacent energy storage modules. Cooling pipes are installed in the heat dissipation cavity, and the energy storage modules and the energy storage temperature sensor are all connected to the battery management module. Several range extender controllers communicate with the battery management module.

4. A methanol range extender parallel power generation system based on dynamic master-slave collaboration according to claim 3, characterized in that: The cooling system is connected to both liquid cooling pipes and methanol pipes. The inlet of the cooling pipe is connected to one end of the methanol pipe, and the other end of the methanol pipe is connected to the outlet pipe of the methanol tank. The outlet of the cooling pipe and the outlet pipe of the methanol tank are both connected to the fuel inlet of the methanol range extender. The outlet pipe of the methanol tank is equipped with a feed pump. The inlet and outlet of the cooling pipe are connected to both ends of the liquid cooling pipe, and a circulation pump is installed on the liquid cooling pipe. The feed pump and circulation pump communicate with the integrated management unit.

5. A methanol range extender parallel power generation system based on dynamic master-slave collaboration according to claim 4, characterized in that: The conversion device includes a DC / DC conversion module and at least one inverter, wherein the DC / DC conversion module is connected to the inverter and the inverter is connected to the load; The inverter communicates with the integrated management unit.

6. A methanol range extender parallel power generation system based on dynamic master-slave collaboration according to claim 5, characterized in that: Load operation data includes real-time load power and predicted load power; The environmental monitoring device includes an ambient temperature sensor and an ambient altitude sensor, which are used to detect ambient temperature and altitude, respectively, and communicate with the integrated management device.

7. A control method for a methanol range extender parallel power generation system based on dynamic master-slave coordination as described in claim 6, characterized in that, The specific steps are as follows: Step S1: Set the priority of several methanol range extenders. The range extender controller in the methanol range extender that starts first is the master controller, and the range extender controllers of other methanol range extenders are slave controllers. Perform calibration tests on the engine to obtain the optimal fixed speed mapping table for methanol engines with different power outputs. Step S2: The integrated management device acquires load operation data, energy storage device charge status, and environmental data; Step S3: Determine the operating mode based on load operation data and the charge status of the energy storage device, and adjust the methanol range extender based on environmental data; And calculate the environmental correction factor based on the environmental data; Step S4: Calculate the number of methanol range extenders to be started and their output power based on the environmental correction factor and operating mode; Step S5: Based on the output power, look up the table to obtain the optimal fixed speed of the methanol engine, and obtain the control strategy. The control strategy includes the operating mode, the number of methanol range extenders started, the output power of the methanol range extenders, and the optimal fixed speed of the methanol engine. Step S6: According to the control strategy, the methanol range extender is coupled with the energy storage device to generate electricity. The electrical energy is converted into the required electrical energy to power the load.

8. The control method for a methanol range extender parallel power generation system based on dynamic master-slave cooperation according to claim 7, characterized in that: In step S3, the operating modes include pure electric discharge, hybrid charging, and hybrid discharge; Pure electric discharge refers to the discharge of only the energy storage device, under the following conditions: and ; in, for The charge state of the energy storage device at all times. Set the value for the first charge state; This represents the maximum discharge power of the energy storage device. The power required by the load; Hybrid charging uses the methanol range extender to generate electricity and the energy storage device to charge, under the following conditions: ； in, Set the value for the second charge state; Hybrid discharge generates electricity from the methanol range extender. The energy storage device discharges or charges based on the difference between the total power generated by the activated methanol range extender and the load power, under the following conditions: and ; in, Set the value for the third charge state; Furthermore, to prevent oscillation, a first charge state return value and a first charge state return value are provided.

9. The control method for a methanol range extender parallel power generation system based on dynamic master-slave cooperation according to claim 8, characterized in that: In step S3, the following adjustments are made based on the ambient temperature: When the ambient temperature is higher than the first lower limit set temperature but lower than the first upper limit set temperature, methanol fuel directly enters the methanol range extender for combustion and power generation. At this time, the temperature correction coefficient is 1. When the ambient temperature is lower than the first lower limit set temperature and higher than the second lower limit set temperature, the preheater is started by providing electrical energy through the energy storage device. After a set time, the methanol fuel enters the methanol range extender through the cooling pipe. The methanol fuel is preheated by the waste heat of the energy storage device and then preheated again by the preheater before entering the methanol range extender. At this time, the temperature correction coefficient is 1. When the ambient temperature is lower than the second lower limit set temperature, the methanol fuel enters the methanol range extender after preliminary waste heat preheating and secondary preheating in the preheater. At this time, the temperature correction coefficient is 0.

8. When the ambient temperature is higher than the first upper limit set temperature but lower than the second upper limit set temperature, the air cooling fan is activated, and the methanol fuel directly enters the methanol range extender for combustion and power generation. At this time, the temperature correction coefficient is 1. When the ambient temperature is higher than the second upper limit set temperature, the air cooling fan will be activated, with a temperature correction factor of 0.

8. In step S3, the following adjustments are made based on the ambient altitude: When the altitude is higher than the set value, the power of the feed pump is increased to the set value to increase the methanol-air mixing ratio; and the altitude correction factor is calculated using the following formula: ； in, This is the altitude correction factor. Altitude correction factor This is the difference between the altitude and the set value; when the altitude is higher than the upper limit... Take 0.5; The formula for calculating the environmental correction factor is as follows: ； in, This is the environmental correction factor. This is the temperature correction factor.

10. The control method for a methanol range extender parallel power generation system based on dynamic master-slave cooperation according to claim 9, characterized in that: In pure electric discharge mode, the number of methanol range extenders started is zero, and the output power is zero. The formula for calculating the number of methanol range extenders activated in hybrid charging mode is as follows: ； in, For the number of launches, The charging coefficient of the energy storage device. This represents the maximum charging power of the energy storage device. This represents the range-extending load factor for methanol. This represents the maximum output power for methanol range extension. It is a rounding function; Output power of methanol range extender The calculation formula is as follows: ； The formula for calculating the number of methanol range extenders started in hybrid discharge mode is as follows: ； Output power of methanol range extender The calculation formula is as follows: ； in, This is the optimal output power proportional coefficient.

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