阅读说明：本技术 一种加氢站高效加氢的优化控制方法 (Optimization control method for efficient hydrogenation of hydrogenation station ) 是由 方沛军 宣锋 石祥 姜方 伍远安 曹俊 于 2021-07-20 设计创作，主要内容包括：本发明涉及一种加氢站高效加氢的优化控制方法,所述优化控制方法,包括如下步骤：S-(1)：通过装卸柱为长管拖车充装；S-(2)：启动加氢、卸气以及充装按钮,使整站处于工作模式；S-(3)：当得到加氢信号时,加氢机对车辆进行加注操作；S-(4)：当得到卸气使能信号时,打开卸气阀门,并关闭45Mpa氢压机；S-(5)：人工启动20Mpa氢压机,检测低压瓶组内的压力,并判断是否有充装使能信号以及加注信号；S-(6)：根据氢气压力范围,选择对应氢压机进行增压；S-(7)：判断有无加氢信号以及增压指令,长管拖车内的氢气经卸气系统和氢压机,向低、中、高压瓶组储氢；S-(8)：当有加注信号时,氢压机启动给该瓶组增压。本发明可以提高氢气利用率,降低运输成本。(The invention relates to an optimization control method for efficient hydrogenation of a hydrogenation station, which comprises the following steps: s 1 : filling the long-tube trailer through the loading and unloading column; s 2 : starting a hydrogenation button, a gas discharge button and a filling button to enable the whole station to be in a working mode; s 3 : when a hydrogenation signal is obtained, the hydrogenation machine performs charging operation on the vehicle; s 4 : when an air discharge enabling signal is obtained, opening an air discharge valve, and closing a 45Mpa hydrogen press; s 5 : manually starting the 20Mpa hydrogen compressor, detecting the pressure in the low-pressure cylinder group, and judging whether a filling enabling signal exists or notAnd a filling signal; s 6 : selecting a corresponding hydrogen press to carry out pressurization according to the hydrogen pressure range; s 7 : judging whether a hydrogenation signal and a pressurization instruction exist, and storing hydrogen in the long-tube trailer to low, medium and high-pressure bottle groups through a gas unloading system and a hydrogen compressor; s 8 : when a filling signal is available, the hydrogen compressor is started to pressurize the cylinder group. The invention can improve the utilization rate of hydrogen and reduce the transportation cost.)

1. An optimization control method for efficient hydrogenation of a hydrogenation station is characterized by comprising the following steps:

S₁: after the hydrogen long-tube trailer enters a station area filling position of a hydrogenation station, a vehicle is fixed and an unloading hose is connected, low-pressure hydrogen from a hydrogen storage cylinder group of the hydrogenation station is pressurized by a 20MPa hydrogen compressor, and the long-tube trailer is filled through a loading and unloading column;

S₂: under the condition of no fault signal, starting a hydrogenation button, an air discharge button and a filling button on the hydrogenation machine to enable the whole station to be in a working mode;

S₃: when a hydrogenation signal is obtained, starting the water chilling unit, filling the vehicle by the hydrogenation unit until the vehicle is finished, and closing the water chilling unit if no hydrogenation signal exists within 5 minutes;

S₄: when the gas unloading enabling signal is obtained, judging the pressure and the gas unloading pressure of a low-pressure cylinder group in the hydrogen long-tube trailer, opening a gas unloading valve until the pressure and the gas unloading pressure of the low-pressure cylinder group are less than 5Mpa, sending an alarm prompt by the gas unloading pressure, and closing a 45Mpa hydrogen press;

S₅: manually starting the 20Mpa hydrogen compressor, detecting the pressure in the low-pressure cylinder group, and judging whether a filling enabling signal and a filling signal exist or not;

S₆: selecting a corresponding hydrogen compressor to carry out pressurization according to the hydrogen pressure range in the hydrogen storage cylinder group on the hydrogen long tube trailer;

S₇: judging whether a hydrogenation signal and a pressurization instruction exist, and storing hydrogen in the long-tube trailer to low, medium and high-pressure bottle groups through a gas unloading system and a hydrogen compressor;

S₈: when a filling signal is available, if the pressure of any one of the hydrogen storage cylinder groups in the hydrogenation unit is lower than a set value, the hydrogen compressor is started to supply hydrogen to the hydrogenation unitThe vial set is pressurized.

2. The method for optimizing and controlling the hydrogenation of the hydrogenation station in high efficiency according to claim 1, wherein in step S₄The detecting the pressure in the low-pressure bottle group and judging whether a filling enabling signal and a filling signal exist specifically comprises the following steps:

S₄₁: if the pressure of the low-pressure bottle group is less than 15Mpa, opening a pneumatic ball valve on the low-pressure bottle group, filling the low-pressure bottle group to 20Mpa, and judging whether a filling signal is received;

S₄₂: if the pressure of the low-pressure cylinder group is larger than or equal to 15Mpa, whether a charging enabling signal exists is further confirmed.

3. The method for optimizing and controlling the hydrogenation of the hydrogenation station in high efficiency according to claim 1, wherein in step S₄₁The determining whether the filling signal is received specifically includes:

S₄₁₁: if a filling signal exists, manually starting a 45Mpa hydrogen compressor to switch to filling operation control; otherwise, the pneumatic ball valve on the low-pressure bottle group is closed.

4. The optimized control method for hydrogenation with high efficiency of hydrogenation station in accordance with claim 3, characterized in that in step S₄₂In the above, the pressure of the low pressure cylinder group is greater than or equal to 15Mpa, and whether there is a charging enable signal is further determined, which specifically includes:

S₄₂₁: if a filling enabling signal is received, judging the pressure of the long-tube trailer; and if the filling enabling signal is not received, judging whether the pressure in the low-pressure bottle group is less than 5Mpa or not.

5. The method for optimizing and controlling the hydrogenation of the hydrogenation station in high efficiency according to claim 4, wherein in step S₄₂₁In (3), judging whether the pressure in the low pressure bottle group is less than P₁The method specifically comprises the following steps:

if the pressure in the low-pressure cylinder group is less than P₁Then go to step S₄(ii) a If the pressure in the low-pressure bottle group is largeAnd when the pressure is equal to or higher than 5Mpa, the hydrogen compressor enters a self-circulation mode, and the hydrogen compressor is stopped after circulation for a period of time T.

6. The method for optimizing and controlling the hydrogenation of the hydrogenation station in high efficiency according to claim 4, wherein in step S₄₂₁In, if receive and fill the enabling signal, judge the pressure of long-tube trailer and specifically include:

if the pressure of the tube trailer is 3Mpa<P₂<17Mpa and when receiving to fill the dress enable signal, then begin to fill the dress long-tube trailer, end to pressure reaches 20Mpa, reset and fill dress enable signal to go to step S_7。

7. The method for optimizing and controlling the hydrogenation of the hydrogenation station in high efficiency according to claim 1, wherein in step S₆In the middle, according to the hydrogen pressure scope in the hydrogen cylinder group on the hydrogen long-tube trailer, choose to correspond the hydrogen compressor and carry out the pressure boost, specifically include the following steps:

S₆₁: if the hydrogen pressure in the hydrogen storage bottle group on the hydrogen long-tube trailer is lower than 5MPa and is more than 1MPa, the pressure is increased by discharging the gas to a 20MPa hydrogen compressor, and the gas is discharged into the hydrogen storage bottle group in the hydrogen long-tube trailer or the 20MPa hydrogen storage bottle group in the hydrogen station;

S₆₂: if the hydrogen pressure on the hydrogen long-tube trailer or in the hydrogen filling station in the 20MPa hydrogen storage bottle group is higher than 5MPa and less than 20MPa, the pressure is increased by discharging the gas to a 45MPa hydrogen compressor, and the gas is filled into the hydrogen storage bottle group in the hydrogen long-tube trailer or the 45MPa hydrogen storage bottle group in the hydrogen filling station.

8. The method for optimizing and controlling the hydrogenation of the hydrogenation station in high efficiency according to claim 1, wherein in step S₇In the middle of, judge whether hydrogenation signal and pressure boost instruction exist, hydrogen in the long-tube trailer is through unloading system and hydrogen compressor, stores up hydrogen to low, medium, high-pressure bottle group, specifically includes as follows:

S_71：when no hydrogenation signal exists and a pressurization instruction exists, hydrogen in the long-tube trailer passes through the gas discharging system and the 45M pressure boosterThe hydrogen compressor Pa stores hydrogen to the low, medium and high pressure cylinder groups, when the hydrogen storage pressure of the low, medium and high pressure cylinder groups reaches 45Mpa, the 45MPa hydrogen compressor automatically stops pressurizing and enters a self-circulation flow, and when no pressurizing instruction exists in set time, the 45MPa hydrogen compressor automatically shuts down;

S_72：when a hydrogenation signal is available, low-pressure hydrogen (less than 5MPa) of the hydrogen storage cylinder group enters a 20MPa hydrogen compressor, and the hydrogen is subjected to closed cooling and then is sent to a charging and discharging process from the 20MPa hydrogen compressor and stored in a hydrogen storage cylinder of a hydrogen long-tube trailer or directly stored in the 20MPa hydrogen storage cylinder group in a hydrogenation station;

S_73：when hydrogen (more than 5MPa) on a hydrogen long-tube trailer or hydrogen from a 20MPa hydrogen storage cylinder group enters a 45MPa compressor, the hydrogen goes to a sequence control panel from the 45MPa compressor after being subjected to closed cooling, and respectively enters a low-pressure cylinder group, a medium-pressure cylinder group and a high-pressure cylinder group in the hydrogen storage cylinder group in a hydrogen station after being subjected to sequence control by the sequence control panel.

9. The optimization control method for hydrogenation station high-efficiency hydrogenation according to claim 8, is characterized in that:

in step S₇₁The method specifically comprises the following steps of:

S_711：when the control system monitors that the pressure of the high-pressure cylinder group is less than 42MPa, the control system preferentially pressurizes and stores hydrogen in the high-pressure cylinder group until the pressure is increased to 45 MPa;

S_712：when the control system monitors that the pressure of the medium-pressure bottle group is less than 42MPa, pressurizing and storing hydrogen in the medium-pressure bottle group until the pressure reaches 45 MPa;

S_713：and when the control system monitors that the pressure of the low-pressure cylinder group is less than 42MPa, pressurizing the low-pressure cylinder group for storing hydrogen until the pressure reaches 45 MPa.

10. The method for optimizing and controlling the hydrogenation of the hydrogenation station in high efficiency according to claim 1, wherein in step S₈When a filling signal is received, if the pressure of any one of the hydrogen storage cylinder groups in the hydrogenation unit is lower than a set valueAnd then the hydrogen compressor is started to pressurize the cylinder group, and the method specifically comprises the following steps:

S₈₁: when a plurality of filling signals are received, if the pressure of a high-pressure cylinder group in a hydrogen storage cylinder group in the hydrogenation machine is lower than a set value, the high-pressure cylinder group is preferentially pressurized to be higher than 35 Mpa;

S₈₂: when a plurality of filling signals are received, if the pressure in a high-pressure cylinder group in a hydrogen storage cylinder group in the hydrogenation machine is lower than 35MPa, and when the pressure of the high-pressure cylinder group in the hydrogen storage cylinder group in the hydrogenation machine is balanced with the serial hydrogen of a vehicle-mounted cylinder group, a pneumatic valve of the high-pressure cylinder group in the hydrogen storage cylinder group in the hydrogenation machine is automatically closed, and the hydrogen compressor directly charges hydrogen for a vehicle and pressurizes the hydrogen to 35MPa, and then the hydrogenation work is stopped; then the high-pressure bottle group and the medium-pressure bottle group are continuously pressurized to 45 MPa.

Technical Field

The invention relates to the technical field of hydrogenation optimization control methods, in particular to an optimization control method for efficient hydrogenation of a hydrogenation station.

Background

The hydrogen energy is a new zero-carbon green energy, accords with the clean, low-carbon, safe and efficient energy policy of China, and the hydrogen fuel cell automobile is a key national support object, so that the hydrogen station becomes an important infrastructure for popularization of the hydrogen fuel cell automobile.

At present, a hydrogen tube bundle vehicle is basically used as a gas source in a hydrogenation station, hydrogen in the tube bundle vehicle is required to be transmitted to a compressor by using a gas discharging column after the tube bundle vehicle enters the station, and the gas discharging column is fixedly arranged in a gas discharging area in the hydrogenation station, so that the hydrogen in the hydrogen tube bundle vehicle can be safely discharged through the gas discharging column and can supply gas to the hydrogen compressor.

Most of hydrogen sources of the existing hydrogen filling stations are hydrogen transported by a long tube trailer, and after the hydrogen arrives at the stations, the hydrogen in the hydrogen long tube trailer is pressurized by a gas discharging system and a hydrogen compressor, and then the hydrogen is filled into the fuel cell automobile by a hydrogen filling machine.

However, the hydrogen inlet pressure is maintained at 5-20MPa due to the characteristics of the diaphragm compressor, and the hydrogen of the tube trailer can only be used from 20MPa to about 6MPa, so that the hydrogen with large specific gravity in the hydrogen storage cylinder group cannot be effectively utilized.

For example, in order to pressurize the current membrane compressor to 45MPa, the source hydrogen pressure of the compressor cannot be lower than a certain value, the lowest value of the inlet pressure is set to 5MPa, and the single-stage compression ratio of the membrane compressor is at most 9, so that 5MPa low-pressure hydrogen cannot be used in the hydrogen long-tube trailer, and at the moment, the hydrogen long-tube trailer needs to be replaced to supply gas to the compressor. Therefore, the low utilization rate of hydrogen causes great waste, and the transportation cost is correspondingly increased.

Disclosure of Invention

In order to solve the problems, the invention provides an optimization control method for efficient hydrogenation of a hydrogenation station, which comprises the following steps:

S₁: after the hydrogen long-tube trailer enters a station area filling position of a hydrogenation station, a vehicle is fixed and an unloading hose is connected, low-pressure hydrogen from a hydrogen storage cylinder group of the hydrogenation station is pressurized by a 20MPa hydrogen compressor, and the long-tube trailer is filled through a loading and unloading column;

S₂: under the condition of no fault signal, starting a hydrogenation button, an air discharge button and a filling button on the hydrogenation machine to enable the whole station to be in a working mode;

S₃: when a hydrogenation signal is obtained, starting the water chilling unit, filling the vehicle by the hydrogenation unit until the vehicle is finished, and closing the water chilling unit if no hydrogenation signal exists within 5 minutes;

S₄: when the gas unloading enabling signal is obtained, judging the pressure and the gas unloading pressure of a low-pressure cylinder group in the hydrogen long-tube trailer, opening a gas unloading valve until the pressure and the gas unloading pressure of the low-pressure cylinder group are less than 5Mpa, sending an alarm prompt by the gas unloading pressure, and closing a 45Mpa hydrogen press;

S₅: manually starting the 20Mpa hydrogen compressor, detecting the pressure in the low-pressure cylinder group, and judging whether a filling enabling signal and a filling signal exist or not;

S₆: selecting a corresponding hydrogen compressor to carry out pressurization according to the hydrogen pressure range in the hydrogen storage cylinder group on the hydrogen long tube trailer;

S₇: judging whether a hydrogenation signal and a pressurization instruction exist, and storing hydrogen in the long-tube trailer to low, medium and high-pressure bottle groups through a gas unloading system and a hydrogen compressor;

S₈: when a filling signal is available, if the pressure of any one of the hydrogen storage cylinder groups in the hydrogenation unit is lower than a set value, the hydrogen compressor is started to pressurize the cylinder group.

Preferably, in step S₄In the above-mentioned detection method, the pressure in the low-pressure bottle group is detected, and its judgement is yesWhether a filling enable signal and a filling signal exist specifically comprises the following steps:

S₄₁: if the pressure of the low-pressure cylinder group is less than 15Mpa, opening a pneumatic ball valve on the low-pressure cylinder group, filling the low-pressure cylinder group to 20Mpa, judging whether a filling signal is received or not,

S₄₂: if the pressure of the low-pressure cylinder group is larger than or equal to 15Mpa, whether a charging enabling signal exists is further determined;

preferably, in step S₄₁The determining whether the filling signal is received specifically includes:

S₄₁₁: if a filling signal exists, manually starting a 45Mpa hydrogen compressor to switch to filling operation control; otherwise, the pneumatic ball valve on the low-pressure bottle group is closed;

preferably, in step S₄₂The further determining whether there is a fill enable signal specifically includes:

S₄₂₁: if a filling enabling signal is received, judging the pressure of the long-tube trailer; if the filling enabling signal is not received, judging whether the pressure in the low-pressure bottle group is less than 5 Mpa;

preferably, in step S₄₂₁In, judging whether the pressure in the low pressure cylinder group is less than 5Mpa specifically includes:

if the pressure in the low-pressure cylinder group is less than 5Mpa, the step S is executed₄(ii) a And if the pressure in the low-pressure cylinder group is more than or equal to 5Mpa, the hydrogen compressor enters a self-circulation mode, and the hydrogen compressor is stopped after circulation for a period of time T.

Preferably, in step S₄₂₁In, if receive and fill the enabling signal, judge the pressure of long-tube trailer and specifically include:

if the pressure of the tube trailer is 3Mpa<P₂<17Mpa and when receiving to fill the dress enable signal, then begin to fill the dress long-tube trailer, end to pressure reaches 20Mpa, reset and fill dress enable signal to go to step S_7。

Preferably, in step S₆In the middle, according to the hydrogen pressure scope in the hydrogen cylinder group on the hydrogen long-tube trailer, choose to correspond the hydrogen compressor and carry out the pressure boost, specifically include the following steps:

S₆₁: if the hydrogen pressure in the hydrogen storage bottle group on the hydrogen long-tube trailer is lower than 5MPa and is more than 1MPa, the pressure is increased by discharging the gas to a 20MPa hydrogen compressor, and the gas is discharged into the hydrogen storage bottle group in the hydrogen long-tube trailer or the 20MPa hydrogen storage bottle group in the hydrogen station;

S₆₂: if the hydrogen pressure on the hydrogen long-tube trailer or in the hydrogen filling station in the 20MPa hydrogen storage bottle group is higher than 5MPa and less than 20MPa, the pressure is increased by discharging the gas to a 45MPa hydrogen compressor, and the gas is filled into the hydrogen storage bottle group in the hydrogen long-tube trailer or the 45MPa hydrogen storage bottle group in the hydrogen filling station.

Preferably, in step S₇In the middle of, judge whether hydrogenation signal and pressure boost instruction exist, hydrogen in the long-tube trailer is through unloading system and hydrogen compressor, stores up hydrogen to low, medium, high-pressure bottle group, specifically includes as follows:

S_71：when no hydrogenation signal exists and a pressurization instruction exists, hydrogen in the long-tube trailer is stored in the low, medium and high-pressure cylinder groups through the gas discharging system and the 45MPa hydrogen compressor, when the hydrogen storage pressure of the low, medium and high-pressure cylinder groups reaches 45MPa, the 45MPa hydrogen compressor automatically stops pressurization and enters a self-circulation flow, and when no pressurization instruction exists in set time, the 45MPa hydrogen compressor automatically shuts down;

S_72：when a hydrogenation signal is available, low-pressure hydrogen (less than 5MPa) of the hydrogen storage cylinder group enters the 20MPa hydrogen compressor, and the hydrogen is subjected to closed cooling and then enters the charging and discharging process from the 20MPa hydrogen compressor and is stored in the hydrogen storage cylinder of the hydrogen long-tube trailer or directly stored in the 20MPa hydrogen storage cylinder group in the hydrogenation station.

S_73：When hydrogen (more than 5MPa) on a hydrogen long-tube trailer or hydrogen from a 20MPa hydrogen storage cylinder group enters a 45MPa compressor, the hydrogen goes to a sequence control panel from the 45MPa compressor after being subjected to closed cooling, and respectively enters a low-pressure cylinder group, a medium-pressure cylinder group and a high-pressure cylinder group in the hydrogen storage cylinder group in a hydrogen station after being subjected to sequence control by the sequence control panel.

Preferably, in step S₇₁The method specifically comprises the following steps of:

S_711：when controllingWhen the system monitors that the pressure of the high-pressure cylinder group is less than 42MPa, the system preferentially pressurizes and stores hydrogen in the high-pressure cylinder group until the pressure is increased to 45 MPa;

S_712：when the control system monitors that the pressure of the medium-pressure bottle group is less than 42MPa, pressurizing and storing hydrogen in the medium-pressure bottle group until the pressure reaches 45 MPa;

S_713：and when the control system monitors that the pressure of the low-pressure cylinder group is less than 42MPa, pressurizing the low-pressure cylinder group for storing hydrogen until the pressure reaches 45 MPa.

Preferably, in step S₈When a filling signal is provided, if the pressure of any one of the hydrogen storage cylinder groups in the hydrogenation unit is lower than a set value, the hydrogen compressor is started to pressurize the cylinder group, and the method specifically comprises the following steps:

S₈₁: when a plurality of filling signals are received, if the pressure of a high-pressure cylinder group in a hydrogen storage cylinder group in the hydrogenation machine is lower than a set value, the high-pressure cylinder group is preferentially pressurized to be higher than 35 Mpa;

S₈₂: when a plurality of filling signals are received, if the pressure in a high-pressure cylinder group in a hydrogen storage cylinder group in the hydrogenation machine is lower than 35MPa, and when the pressure of the high-pressure cylinder group in the hydrogen storage cylinder group in the hydrogenation machine is balanced with the serial hydrogen of a vehicle-mounted cylinder group, a pneumatic valve of the high-pressure cylinder group in the hydrogen storage cylinder group in the hydrogenation machine is automatically closed, and the hydrogen compressor directly charges hydrogen for a vehicle and pressurizes the hydrogen to 35MPa, and then the hydrogenation work is stopped; then the high-pressure bottle group and the medium-pressure bottle group are continuously pressurized to 45 MPa.

Compared with the prior art, the filling optimization control method for the high-efficiency hydrogenation of the hydrogenation station has the following beneficial effects:

1. by system integration and optimization filling method, the shortage of hydrogen source in a hydrogen station can be solved, the utilization rate of hydrogen is improved, and hydrogen with the pressure of less than 5MPa in a hydrogen storage cylinder group is used for 1MPa (the water volume of a common long-tube trailer is 24 m)³The transportation cost of the hydrogen long-tube trailer is 10 yuan/km), low-pressure hydrogen is stored in the hydrogen long-tube trailer and the hydrogen storage bottle group of 20MPa in the station through the pressurization of the compressor of 20MPa, then hydrogen (5-20 MPa) which continuously meets the requirements is provided for the compressor of 45MPa, and the hydrogen is stored in the hydrogen storage bottle group of 45MPa through the pressurization of the compressor of 45MPaIn the method, 35MPa of hydrogen is quickly filled into the fuel cell vehicle, or the hydrogen is directly filled into the fuel cell vehicle through pressurization of a 45MPa compressor, so that the problem of high cost of hydrogen long-distance transportation is solved;

2. the process technology and the scheme are advanced, the energy consumption is saved to the maximum extent, a novel high-efficiency compressor is adopted, the self-circulation function is achieved, and the energy conversion efficiency is improved;

3. the invention provides long-tube trailer filling and nitrogen container filling, solves the problem that a single system can only fill the fuel cell, and can provide more functions while filling the fuel cell vehicle. The system adopts automation, informatization, intellectualization, centralized control and unified management.

Drawings

FIG. 1 is a schematic flow chart of an optimization control method for efficient hydrogenation of a hydrogenation station in an embodiment of the invention;

FIG. 2 shows step S in the embodiment of the present invention₄The specific flow diagram in (1);

FIG. 3 shows step S in the embodiment of the present invention₆The specific flow diagram in (1);

FIG. 4 shows step S in the embodiment of the present invention₇The specific flow diagram in (1);

FIG. 5 shows step S in the embodiment of the present invention₇₁The specific flow diagram in (1);

FIG. 6 shows step S in the embodiment of the present invention₈The detailed process diagram in (1).

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, an embodiment of the present invention provides an optimization control method for efficient hydrogenation in a hydrogenation station, including the following steps:

S₁: after the hydrogen long-tube trailer enters a station area filling position of a hydrogenation station, a vehicle is fixed and an unloading hose is connected, low-pressure hydrogen from a hydrogen storage cylinder group of the hydrogenation station is pressurized by a 20MPa hydrogen compressor, and the long-tube trailer is filled through a loading and unloading column;

S₂: under the condition of no fault signal, starting a hydrogenation button, an air discharge button and a filling button on the hydrogenation machine to enable the whole station to be in a working mode;

S₃: when a hydrogenation signal is obtained, starting the water chilling unit, filling the vehicle by the hydrogenation unit until the vehicle is finished, and closing the water chilling unit if no hydrogenation signal exists within 5 minutes;

S₄: when the gas unloading enabling signal is obtained, judging the pressure and the gas unloading pressure of a low-pressure cylinder group in the hydrogen long-tube trailer, opening a gas unloading valve until the pressure and the gas unloading pressure of the low-pressure cylinder group are less than 5Mpa, sending an alarm prompt by the gas unloading pressure, and closing a 45Mpa hydrogen press;

S₅: manually starting the 20Mpa hydrogen compressor, detecting the pressure in the low-pressure cylinder group, and judging whether a filling enabling signal and a filling signal exist or not;

S₆: selecting a corresponding hydrogen compressor to carry out pressurization according to the hydrogen pressure range in the hydrogen storage cylinder group on the hydrogen long tube trailer;

S₇: judging whether a hydrogenation signal and a pressurization instruction exist, and storing hydrogen in the long-tube trailer to low, medium and high-pressure bottle groups through a gas unloading system and a hydrogen compressor;

S₈: when fillingWhen the signal is received, if the pressure of any one cylinder group in the hydrogen storage cylinder group in the hydrogenation machine is lower than the set value, the hydrogen compressor is started to pressurize the cylinder group.

Specifically, referring to FIG. 2, in the embodiment of the present invention, in step S₄The detecting the pressure in the low-pressure bottle group and judging whether a filling enabling signal and a filling signal exist specifically comprises the following steps:

S₄₁: if the pressure of the low-pressure bottle group is less than 15Mpa, opening a pneumatic ball valve on the low-pressure bottle group, filling the low-pressure bottle group to 20Mpa, and judging whether a filling signal is received;

S₄₂: if the pressure of the low-pressure cylinder group is larger than or equal to 15Mpa, whether a charging enabling signal exists is further confirmed.

Specifically, in the embodiment of the present invention, in step S₄₁The determining whether the filling signal is received specifically includes:

S₄₁₁: if a filling signal exists, manually starting a 45Mpa hydrogen compressor to switch to filling operation control; otherwise, the pneumatic ball valve on the low-pressure bottle group is closed.

Specifically, in the embodiment of the present invention, in step S₄₂In the above, the pressure of the low pressure cylinder group is greater than or equal to 15Mpa, and whether there is a charging enable signal is further determined, which specifically includes:

S₄₂₁: if a filling enabling signal is received, judging the pressure of the long-tube trailer; if the filling enabling signal is not received, judging whether the pressure in the low-pressure bottle group is less than 5 Mpa;

specifically, in the embodiment of the present invention, in step S₄₂₁In, judging whether the pressure in the low pressure cylinder group is less than 5Mpa specifically includes:

if the pressure in the low-pressure cylinder group is less than 5Mpa, the step S is executed₄(ii) a And if the pressure in the low-pressure cylinder group is more than or equal to 5Mpa, the hydrogen compressor enters a self-circulation mode, and the hydrogen compressor is stopped after circulation for a period of time T.

Specifically, in the embodiment of the present invention, in step S₄₂₁In, if receive and fill dress enable signal, judge long-tube trailerThe pressure of (a) specifically includes:

if the pressure of the tube trailer is 3Mpa<P₂<17Mpa and when receiving to fill the dress enable signal, then begin to fill the dress long-tube trailer, end to pressure reaches 20Mpa, reset and fill dress enable signal to go to step S_7。

Specifically, referring to FIG. 3, in the embodiment of the present invention, in step S₆In the middle, according to the hydrogen pressure scope in the hydrogen cylinder group on the hydrogen long-tube trailer, choose to correspond the hydrogen compressor and carry out the pressure boost, specifically include the following steps:

S₆₁: if the hydrogen pressure in the hydrogen storage bottle group on the hydrogen long-tube trailer is lower than 5MPa and is more than 1MPa, the pressure is increased by discharging the gas to a 20MPa hydrogen compressor, and the gas is discharged into the hydrogen storage bottle group in the hydrogen long-tube trailer or the 20MPa hydrogen storage bottle group in the hydrogen station;

S₆₂: if the hydrogen pressure on the hydrogen long-tube trailer or in the hydrogen filling station in the 20MPa hydrogen storage bottle group is higher than 5MPa and less than 20MPa, the pressure is increased by discharging the gas to a 45MPa hydrogen compressor, and the gas is filled into the hydrogen storage bottle group in the hydrogen long-tube trailer or the 45MPa hydrogen storage bottle group in the hydrogen filling station.

Specifically, referring to FIG. 4, in the embodiment of the present invention, in step S₇In the middle of, judge whether hydrogenation signal and pressure boost instruction exist, hydrogen in the long-tube trailer is through unloading system and hydrogen compressor, stores up hydrogen to low, medium, high-pressure bottle group, specifically includes as follows:

S_71：when no hydrogenation signal exists and a pressurization instruction exists, hydrogen in the long-tube trailer is stored in the low, medium and high-pressure cylinder groups through the gas discharging system and the 45MPa hydrogen compressor, when the hydrogen storage pressure of the low, medium and high-pressure cylinder groups reaches 45MPa, the 45MPa hydrogen compressor automatically stops pressurization and enters a self-circulation flow, and when no pressurization instruction exists in set time, the 45MPa hydrogen compressor automatically shuts down;

S_72：when a hydrogenation signal is available, low-pressure hydrogen (less than 5MPa) of the hydrogen storage cylinder group enters the 20MPa hydrogen compressor, and the hydrogen is subjected to closed cooling and then goes to a filling and gas unloading process from the 20MPa hydrogen compressor and is stored in the hydrogen storage cylinder of the hydrogen long-tube trailer or in the hydrogen storage cylinder of the hydrogen long-tube trailerDirectly stored in a hydrogen storage cylinder group with the pressure of 20MPa in the hydrogen filling station.

S_73：When hydrogen (more than 5MPa) on a hydrogen long-tube trailer or hydrogen from a 20MPa hydrogen storage cylinder group enters a 45MPa compressor, the hydrogen goes to a sequence control panel from the 45MPa compressor after being subjected to closed cooling, and respectively enters a low-pressure cylinder group, a medium-pressure cylinder group and a high-pressure cylinder group in the hydrogen storage cylinder group in a hydrogen station after being subjected to sequence control by the sequence control panel.

Specifically, in the embodiment of the present invention, in step S₇₁The method specifically comprises the following steps of:

S_711：when the control system monitors that the pressure of the high-pressure cylinder group is less than 42MPa, the control system preferentially pressurizes and stores hydrogen in the high-pressure cylinder group until the pressure is increased to 45 MPa;

S_712：when the control system monitors that the pressure of the medium-pressure bottle group is less than 42MPa, pressurizing and storing hydrogen in the medium-pressure bottle group until the pressure reaches 45 MPa;

S_713：and when the control system monitors that the pressure of the low-pressure cylinder group is less than 42MPa, pressurizing the low-pressure cylinder group for storing hydrogen until the pressure reaches 45 MPa.

Specifically, in the embodiment of the present invention, in step S₈When a filling signal is provided, if the pressure of any one of the hydrogen storage cylinder groups in the hydrogenation unit is lower than a set value, the hydrogen compressor is started to pressurize the cylinder group, and the method specifically comprises the following steps:

S₈₁: when a plurality of filling signals are received, if the pressure of a high-pressure cylinder group in a hydrogen storage cylinder group in the hydrogenation machine is lower than a set value, the high-pressure cylinder group is preferentially pressurized to be higher than 35 Mpa;

S₈₂: when a plurality of filling signals are received, if the pressure in a high-pressure cylinder group in a hydrogen storage cylinder group in the hydrogenation machine is lower than 35MPa, and when the pressure of the high-pressure cylinder group in the hydrogen storage cylinder group in the hydrogenation machine is balanced with the serial hydrogen of a vehicle-mounted cylinder group, a pneumatic valve of the high-pressure cylinder group in the hydrogen storage cylinder group in the hydrogenation machine is automatically closed, and the hydrogen compressor directly charges hydrogen for a vehicle and pressurizes the hydrogen to 35MPa, and then the hydrogenation work is stopped; then the high-pressure bottle group and the medium-pressure bottle group are continuously pressurized to 45 MPa.

Although the present disclosure is made in light of the above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.