A method, system, and computer program product for the safety management of hydrogen refueling stations.

Abstract

This invention relates to a method, system, and computer program product for hydrogen refueling station safety management, belonging to the field of hydrogen refueling station management technology. Based on the upper limits of response time and detection range for each sensor, and the positional relationship between the sensor's corresponding detection area and the area where the hydrogen leak point is located, an evaluation score for the sensor sensitivity index is determined. Based on the maintenance values ​​of each maintenance item in the graded maintenance cycle of the filling equipment and historical hydrogen leak data of the filling equipment, an evaluation score for the filling equipment health index is obtained. Based on the evaluation scores of the sensor sensitivity index and the filling equipment health index, a hydrogen refueling station safety evaluation score is determined. Based on the hydrogen refueling station safety evaluation score, a hydrogen refueling station safety management plan is determined. This invention can quantify the overall safety status of a hydrogen refueling station, facilitating the acquisition and evaluation of the overall safety status, and facilitating the formulation or adjustment of hydrogen refueling station safety management plans.

Description

Technical Field

[0001] This invention relates to the field of hydrogen refueling station management technology, and in particular to a hydrogen refueling station safety management method, system, and computer program product. Background Technology

[0002] With the continued expansion of demand for green energy, the number of newly built hydrogen refueling stations is growing rapidly. A hydrogen refueling station is a facility or site for refueling hydrogen fuel cell vehicles, hydrogen internal combustion engine vehicles, and hydrogen-natural gas hybrid fuel vehicles with hydrogen storage tanks. It includes refueling equipment such as compressors (diaphragm compressors, liquid-driven compressors), hydrogen dispensers, unloading columns, sequential control panels, high, medium, and low-pressure hydrogen storage tanks, and chillers. Safety is the foundation and inherent requirement for the industrialization of hydrogen energy. The main safety risk faced by hydrogen refueling stations is hydrogen leakage. Hydrogen is a Class A flammable gas with high thermal expansion, low density, strong diffusivity, and is highly flammable and explosive. It is colorless and odorless, making leaks difficult to detect. In pressure vessels or pipelines, rising temperatures can cause overpressure and hydrogen leakage, or hydrogen embrittlement of metallic materials can also lead to leaks. Based solely on parameters such as the response time and detection range of hydrogen detection sensors, it is difficult to directly obtain the overall sensitivity of the sensors at a hydrogen refueling station. This makes it challenging to monitor hydrogen leakage, diffusion, and concentration distribution in real time. Furthermore, different types of filling equipment involve different maintenance cycles and items, hindering a comprehensive understanding of the station's overall safety situation and making it difficult to determine appropriate safety management plans. Therefore, it is necessary to adopt safety management technologies adapted to the safe operation of hydrogen refueling stations to prevent safety risks arising from hydrogen leaks. Summary of the Invention

[0003] To address the aforementioned problems, the inventors have developed this invention, which provides a method, system, and computer program product for the safety management of hydrogen refueling stations.

[0004] In a first aspect, the present invention provides a method for safety management of hydrogen refueling stations, comprising:

[0005] A safety management assessment model for hydrogen refueling stations is established, and the assessment indicators of the safety management assessment model include sensor sensitivity indicators and filling equipment health indicators.

[0006] Multiple detection zones are set up at the hydrogen refueling station, and at least one sensor for hydrogen detection is arranged in each detection zone; the index value of the sensor sensitivity index is determined according to the upper limit of the response time and the upper limit of the detection range of each sensor; the weight of the sensor sensitivity index is adjusted according to the positional relationship between the detection zone corresponding to the sensor and the area where the hydrogen leak point is located; the evaluation score of the sensor sensitivity index is determined according to the index value and weight of the sensor sensitivity index.

[0007] The process involves: acquiring the maintenance status of each maintenance item in the graded maintenance cycle of the filling equipment; mapping the maintenance status of the graded maintenance cycle of the filling equipment to a preset score range to obtain the maintenance value of each maintenance item in the graded maintenance cycle of the filling equipment; obtaining the index value of the health index of the filling equipment based on the maintenance value of each maintenance item in each graded maintenance cycle of the filling equipment; adjusting the weight of the health index of the filling equipment based on the historical hydrogen leakage data of the filling equipment; and determining the evaluation score of the health index of the filling equipment based on the index value and weight of the health index of the filling equipment.

[0008] Based on the evaluation scores of the sensor sensitivity index and the evaluation scores of the filling equipment health index, the hydrogen refueling station safety evaluation score of the safety management evaluation model is determined; based on the hydrogen refueling station safety evaluation score, the hydrogen refueling station safety management plan is determined.

[0009] Optionally, the sensitivity index of the sensor is determined based on the upper limit of the response time and the upper limit of the detection range of each sensor, including:

[0010] Obtain the upper limit of response time and the upper limit of detection range for each sensor, convert different upper limit values ​​of response time to the same unit of measurement, and convert different upper limit values ​​of detection range to the same unit of measurement;

[0011] according to Determine the index value of the sensor sensitivity index, wherein, The index value represents the sensor's sensitivity index. N s This indicates the total number of sensors used for hydrogen detection. i This indicates the sensor number used for hydrogen detection. R i Indicates the number is i The upper limit of the detection range of the sensor used for hydrogen detection. t i Indicates the number is i The upper limit of the response time of the sensor used for hydrogen detection.

[0012] Optionally, the weight of the sensor sensitivity index can be adjusted based on the positional relationship between the sensor's detection area and the area where the hydrogen leak point is located, including:

[0013] Acquire the detection data from each of the sensors;

[0014] Based on the detection data, the sensor that detected hydrogen was identified;

[0015] The direction of hydrogen diffusion is obtained based on the location of the sensor that detected hydrogen and the time when hydrogen was detected.

[0016] The hydrogen diffusion area is determined based on the hydrogen diffusion direction and the corresponding detection area of ​​the sensor that detected the hydrogen.

[0017] The hydrogen diffusion area and its adjacent detection area are inspected to obtain the location of the hydrogen leak point;

[0018] Obtain the minimum gas path distance between the hydrogen leak point and the sensor that detected the hydrogen;

[0019] The weight of the sensor sensitivity index is adjusted based on the location of the hydrogen leak point, the hydrogen diffusion area and its adjacent detection area, and the minimum gas path distance.

[0020] Optionally, the weight of the sensor sensitivity index can be adjusted based on the location of the hydrogen leak point, the hydrogen diffusion area and its adjacent detection area, and the minimum gas path distance, including:

[0021] If the hydrogen leak point is located within the hydrogen diffusion area and the minimum gas path distance does not exceed the distance between the two farthest points in the hydrogen diffusion area, then the weight of the sensor sensitivity index is increased; if the hydrogen leak point is located outside the hydrogen diffusion area and its adjacent detection area, or the minimum gas path distance exceeds the distance between the two farthest points in the hydrogen diffusion area, then the weight of the sensor sensitivity index is decreased.

[0022] Optionally, the health index value of the filling equipment is obtained based on the maintenance value of each maintenance item in each maintenance cycle of the filling equipment, including:

[0023] Based on the type of filling equipment, different graded maintenance cycles are set for different filling equipment. Each graded maintenance cycle for each filling equipment includes multiple maintenance items.

[0024] according to Determine the index value of the health index of the filling equipment, wherein, The index value represents the health status of the filling equipment. N e This indicates the total number of filling devices. j Indicates the filling equipment number. E j Indicates the number is j Maintenance values ​​for filling equipment;

[0025] according to The number is determined to be j Maintenance value of filling equipment Indicates the number is j The worst maintenance value among the daily maintenance items in the most recent daily maintenance cycle for the filling equipment, if the number isj If the filling equipment does not have a daily maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the weekly maintenance items in the most recent weekly maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a weekly maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the monthly maintenance items in the most recent monthly maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a monthly maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the quarterly maintenance items in the most recent quarterly maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a quarterly maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the annual maintenance items in the most recent annual maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have an annual maintenance program, then... =1; L j Indicates the number is j The number of levels in the graded maintenance cycle of the filling equipment.

[0026] Optionally, the weights of the health indicators of the filling equipment can be adjusted based on historical hydrogen leakage data, including:

[0027] Obtain historical data on hydrogen leaks from different types of filling equipment;

[0028] Based on historical hydrogen leakage data of the different types of filling equipment, determine the shortest time interval for hydrogen leakage for each type of filling equipment;

[0029] Weights are assigned to different types of filling equipment based on the shortest time interval for hydrogen leakage for each type of filling equipment.

[0030] The weight of the health index of the filling equipment is determined based on the number of different types of filling equipment at the hydrogen refueling station and the weight of different types of filling equipment.

[0031] Optionally, weights can be set for different types of filling equipment based on the shortest time interval for hydrogen leakage for each type of filling equipment, including:

[0032] according to Set weights for different types of filling equipment, among which, The hydrogen refueling station filling equipment type number isk The weight of the filling equipment k This indicates the type number of the hydrogen refueling station's filling equipment. K This indicates the total number of types of hydrogen refueling equipment at hydrogen refueling stations. The hydrogen refueling station filling equipment type number is k The shortest time interval for hydrogen leakage in the filling equipment.

[0033] Optionally, the weights of the health indicators of the filling equipment are determined based on the number of different types of filling equipment at the hydrogen refueling station and the weights of different types of filling equipment, including:

[0034] Based on the number of different types of filling equipment at the hydrogen refueling station, determine the proportion of different types of filling equipment to the total number of filling equipment at the hydrogen refueling station;

[0035] according to Determine the weights of the health indicators of the filling equipment. The index value represents the health status of the filling equipment. k This indicates the type number of the hydrogen refueling station's filling equipment. K This indicates the total number of types of hydrogen refueling equipment at hydrogen refueling stations. The hydrogen refueling station filling equipment type number is k The percentage of filling equipment in the total number of filling equipment types at hydrogen refueling stations. The hydrogen refueling station filling equipment type number is k The weight of the filling equipment.

[0036] Secondly, the present invention provides a hydrogen refueling station safety management system, comprising:

[0037] The evaluation model building module is used to build a safety management evaluation model for hydrogen refueling stations. The evaluation indicators of the safety management evaluation model include sensor sensitivity indicators and filling equipment health indicators.

[0038] An evaluation index acquisition module is used to collect evaluation scores for sensor sensitivity and filling equipment health. Multiple detection zones are set up at the hydrogen refueling station, with at least one sensor for hydrogen detection deployed in each zone. The sensor sensitivity index value is determined based on the upper limit of each sensor's response time and upper limit of its detection range. The weight of the sensor sensitivity index is adjusted based on the positional relationship between the sensor's corresponding detection zone and the area where the hydrogen leak point is located. The evaluation score of the sensor sensitivity index is determined based on its index value and weight. The module also acquires the maintenance status of each maintenance item in the tiered maintenance cycle of the filling equipment. The maintenance status of the tiered maintenance cycle is mapped to a preset score range to obtain the maintenance value of each maintenance item in the tiered maintenance cycle. The index value of the filling equipment health index is obtained based on the maintenance value of each maintenance item in each tiered maintenance cycle. The weight of the filling equipment health index is adjusted based on historical hydrogen leak data. Finally, the evaluation score of the filling equipment health index is determined based on its index value and weight.

[0039] The hydrogen refueling station safety management module is used to determine the hydrogen refueling station safety assessment score of the safety management assessment model based on the assessment scores of the sensor sensitivity index and the health index of the filling equipment; and to determine the hydrogen refueling station safety management plan based on the hydrogen refueling station safety assessment score.

[0040] Based on the same inventive concept, the present invention also provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of the aforementioned hydrogen refueling station safety management method.

[0041] The beneficial effects of the above-mentioned technical solution provided by the present invention include at least the following:

[0042] This invention establishes a safety management assessment model for hydrogen refueling stations. Based on the upper limit of response time and detection range of each hydrogen detection sensor, and the positional relationship between the corresponding detection area and the hydrogen leak point, the model accurately obtains the index values, weights, and evaluation scores of the sensitivity indicators of hydrogen detection sensors at hydrogen refueling stations. This provides an overall picture of the sensitivity and effectiveness of the hydrogen detection sensors, offering quantitative references for modifications to the selection, quantity, and location of hydrogen detection sensors. Furthermore, it obtains the maintenance status of each maintenance item within the graded maintenance cycle of the filling equipment. By combining historical data on hydrogen leaks from filling equipment, we can accurately obtain the index values, weights, and evaluation scores of the health indicators of the filling equipment. This allows us to obtain the overall health status of various types of filling equipment at the hydrogen refueling station, facilitating the evaluation and adjustment of maintenance plans for different types of filling equipment. By obtaining the evaluation scores of sensor sensitivity indicators and filling equipment health indicators, and determining the safety evaluation score of the hydrogen refueling station, we can quantify the overall safety status of the hydrogen refueling station, facilitating the assessment of the overall safety status of the hydrogen refueling station, and making it easier to formulate or adjust the safety management plan for the hydrogen refueling station.

[0043] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0044] 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

[0045] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0046] Figure 1 This is a flowchart of the hydrogen refueling station safety management method in an embodiment of the present invention;

[0047] Figure 2 This is a block diagram of the hydrogen refueling station safety management system in an embodiment of the present invention. Detailed Implementation

[0048] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0049] To address the problems existing in the prior art, embodiments of the present invention provide a method, system, and computer program product for the safety management of hydrogen refueling stations.

[0050] This invention provides a method for the safety management of hydrogen refueling stations, the process of which is as follows: Figure 1 As shown, it includes the following steps:

[0051] Step 1: Establish a safety management assessment model for hydrogen refueling stations. The assessment indicators of the safety management assessment model include sensor sensitivity indicators and filling equipment health indicators.

[0052] In the aforementioned safety management assessment model, the sensor sensitivity index reflects the overall sensitivity of the hydrogen detection sensors at the hydrogen refueling station. A higher sensor sensitivity score indicates higher overall sensitivity of the hydrogen detection sensors, and vice versa. The filling equipment health index reflects the overall health of the filling equipment at the hydrogen refueling station. Health is a quantitative description of the overall safe operation of the filling equipment. A higher filling equipment health score indicates better overall safe operation of the filling equipment, and vice versa.

[0053] Step 2: Set up multiple detection zones at the hydrogen refueling station, and deploy at least one sensor for hydrogen detection in each detection zone; determine the index value of the sensor sensitivity index based on the upper limit of the response time and the upper limit of the detection range of each sensor; adjust the weight of the sensor sensitivity index based on the positional relationship between the detection zone corresponding to the sensor and the area where the hydrogen leak point is located; determine the evaluation score of the sensor sensitivity index based on the index value and weight of the sensor sensitivity index.

[0054] By establishing a safety management assessment model for hydrogen refueling stations, based on the upper limit of response time and detection range of each hydrogen detection sensor, and the location relationship between the corresponding detection area of ​​the hydrogen detection sensor and the area where the hydrogen leak point is located, the model can accurately obtain the index value, weight, and evaluation score of the sensitivity index of the hydrogen detection sensors at hydrogen refueling stations based on the detection effect. This model can provide an overall understanding of the sensitivity and effect of the hydrogen detection sensors at hydrogen refueling stations, and can provide quantitative references for modifications to the selection, number, and location of hydrogen detection sensors.

[0055] In some specific embodiments, multiple detection zones are set up in the hydrogen refueling station, and at least one sensor for hydrogen detection is arranged in each detection zone. This includes dividing the space of the hydrogen refueling station into multiple zones, each zone being a cubic grid. Based on the zone division and the number of hydrogen pipeline interfaces, valves, etc., within each zone, a hydrogen detection sensor array is set up to detect hydrogen in multiple zones. By dividing the space of the hydrogen refueling station into multiple zones and setting up a hydrogen detection sensor array, hydrogen leaks can be detected throughout the entire hydrogen refueling station, allowing for timely and accurate identification of leak areas.

[0056] Furthermore, nitrogen purging devices are installed in areas such as the top of enclosed spaces and spaces with poor ventilation. When hydrogen is detected in these areas, the nitrogen purging devices are activated to prevent the amount of leaked hydrogen from accumulating to the explosive limit.

[0057] In some specific embodiments, the index value of the sensor sensitivity index is determined based on the response time and detection range of each sensor, including:

[0058] Obtain the upper limit of response time and the upper limit of detection range for each sensor, convert different upper limit values ​​of response time to the same unit of measurement, and convert different upper limit values ​​of detection range to the same unit of measurement;

[0059] according to Determine the index value of the sensor sensitivity index, wherein, The index value represents the sensor's sensitivity index. N s This indicates the total number of sensors used for hydrogen detection. i This indicates the sensor number used for hydrogen detection. R i This represents the upper limit of the detection range of the sensor numbered i used for hydrogen detection. t i This represents the upper limit of the response time of the sensor numbered i used for hydrogen detection. This is the accumulation symbol.

[0060] For the same hydrogen detection sensor, the shorter the response time and the larger the detection range, the higher the sensitivity. This system accurately reflects the sensitivity of a single hydrogen detection sensor and converts the upper limits of response time and detection range to the same unit of measurement, avoiding data inconsistencies caused by different units. For example, the units LEL% (Lower Explosive Limit percentage) and VOL% (Volume Percentage) of the upper limit of detection range are converted to ppm (parts per million), with the conversion ratio: 1VOL% = 10000ppm, 1LEL% = (VOL% / LEL value of hydrogen) × 100.

[0061] In some specific embodiments, the weight of the sensor sensitivity index is adjusted according to the positional relationship between the sensor's detection area and the area where the hydrogen leak point is located, including:

[0062] Acquire the detection data from each of the sensors;

[0063] Based on the detection data, the sensor that detected hydrogen was identified;

[0064] The direction of hydrogen diffusion is obtained based on the location of the sensor that detected hydrogen and the time when hydrogen was detected.

[0065] The hydrogen diffusion area is determined based on the hydrogen diffusion direction and the corresponding detection area of ​​the sensor that detected the hydrogen.

[0066] The hydrogen diffusion area and its adjacent detection area are inspected to obtain the location of the hydrogen leak point; for example, an acoustic imager, a laser spectral inspection system, or other equipment are used for inspection to locate the hydrogen leak point.

[0067] Obtain the minimum gas path distance between the hydrogen leak point and the sensor that detected the hydrogen;

[0068] The weight of the sensor sensitivity index is adjusted based on the location of the hydrogen leak point, the hydrogen diffusion area and its adjacent detection area, and the minimum gas path distance.

[0069] By adjusting the weight of the sensor's sensitivity index based on the positional relationship between the sensor's detection area and the area where the hydrogen leak point is located, the weight of the hydrogen detection sensor's sensitivity index at the hydrogen refueling station can be accurately obtained based on the detection effect. This makes the evaluation score of the hydrogen detection sensor's sensitivity index at the hydrogen refueling station more reasonable and reflects the accurate characteristics of the corresponding hydrogen refueling station.

[0070] In some specific embodiments, the hydrogen diffusion direction is obtained based on the location of the sensor that detected hydrogen and the time of hydrogen detection, including:

[0071] Based on the order in which hydrogen was detected, the sensors that detected hydrogen are sorted to obtain a sensor sequence; based on the positions of the sensors that detected hydrogen first and the sensors that detected hydrogen later in the adjacent sensors in the sensor sequence, at least one hydrogen diffusion direction is determined.

[0072] The positions of the sensors that detect hydrogen are analogous to two points in three-dimensional space. Pointing from the position of the sensor that detected hydrogen first to the position of the sensor that detected hydrogen later creates a three-dimensional vector. The direction of this vector is the direction of hydrogen diffusion. When the sensor sequence includes three or more sensors, multiple hydrogen diffusion directions can be obtained through this sequence, providing more comprehensive information about hydrogen diffusion. Determining the hydrogen diffusion direction improves the efficiency of hydrogen leak detection, helps shorten inspection time, and allows for faster location of leaks.

[0073] In some specific embodiments, the weight of the sensor sensitivity index is adjusted based on the location of the hydrogen leak point, the hydrogen diffusion area and its adjacent detection area, and the minimum gas path distance, including:

[0074] If the hydrogen leak point is located within the hydrogen diffusion area and the minimum gas path distance does not exceed the distance between the two farthest points in the hydrogen diffusion area, then the weight of the sensor sensitivity index is increased; if the hydrogen leak point is located outside the hydrogen diffusion area and its adjacent detection area, or the minimum gas path distance exceeds the distance between the two farthest points in the hydrogen diffusion area, then the weight of the sensor sensitivity index is decreased.

[0075] The fact that the hydrogen leak point is located within the hydrogen diffusion area indicates that the sensor detected the leak promptly, demonstrating high sensitivity. However, since the two points with the lowest gas path distance (the hydrogen leak point and the sensor detecting the hydrogen) are also within the hydrogen diffusion area, if this lowest gas path distance exceeds the distance between the two farthest points in the hydrogen diffusion area, it suggests that the lowest gas path is quite tortuous, containing many broken lines or curves. This would explain why it exceeds the distance between the two farthest points in the hydrogen diffusion area. Furthermore, this indicates poor ventilation conditions in the area traversed by this gas path. Poor ventilation conditions reduce the overall sensitivity of hydrogen detection at the refueling station, and the weight of the sensor's sensitivity index should be reduced. Therefore, simply having the hydrogen leak point located within the hydrogen diffusion area does not necessarily indicate high overall sensitivity of hydrogen detection. Thus, the weight of the sensor's sensitivity index should only be increased if the hydrogen leak point is located within the hydrogen diffusion area and the lowest gas path distance does not exceed the distance between the two farthest points in the hydrogen diffusion area. Similarly, if the hydrogen leak point is located outside the hydrogen diffusion area, it indicates that the sensor cannot detect the leak in time, indicating low sensitivity. Therefore, the weight of this sensor sensitivity index should be reduced. Similarly, if the minimum gas path distance exceeds the distance between the two farthest points in the hydrogen diffusion area, the weight of this sensor sensitivity index should also be reduced. These adjustments allow for a more accurate and reasonable determination of the sensor sensitivity index weights, contributing to a more accurate and reasonable sensor sensitivity evaluation score.

[0076] Step 3: Obtain the maintenance status of each maintenance item in the graded maintenance cycle of the filling equipment; map the maintenance status of the graded maintenance cycle of the filling equipment to a preset score range to obtain the maintenance value of each maintenance item in the graded maintenance cycle of the filling equipment; obtain the index value of the health index of the filling equipment based on the maintenance value of each maintenance item in each graded maintenance cycle of the filling equipment; adjust the weight of the health index of the filling equipment based on the historical hydrogen leakage data of the filling equipment; determine the evaluation score of the health index of the filling equipment based on the index value and weight of the health index of the filling equipment.

[0077] By acquiring the maintenance status of each maintenance item in the graded maintenance cycle of the filling equipment and the historical data of hydrogen leakage of the filling equipment, the index values, weights and evaluation scores of the health indicators of the filling equipment can be accurately obtained. This allows for the acquisition of the overall health status of various types of filling equipment in hydrogen refueling stations, facilitating the evaluation and adjustment of maintenance plans for different types of filling equipment.

[0078] The graded maintenance cycle involves different time periods. For example, the graded maintenance cycle includes daily, weekly, monthly, quarterly and annual cycles. The graded maintenance cycle of hydrogen compressors includes daily, monthly and annual cycles. Its daily maintenance items include operation status inspection and leak detection. Monthly maintenance items include diaphragm / piston ring wear and emergency stop function test. Annual maintenance items include seal replacement and hydraulic oil contamination test. If the preset score range is 0 to 10, the method of mapping the maintenance status to the preset score range can be as follows: the default is full score, and 1 point is deducted for each abnormal point, down to a minimum of 0 points.

[0079] By mapping the maintenance status of the tiered maintenance cycle of filling equipment to a preset score range, the maintenance value of each maintenance item in the tiered maintenance cycle of filling equipment can be obtained, and different maintenance items of different types of filling equipment can be evaluated under the same dimension.

[0080] In some specific embodiments, the health index value of the filling equipment is obtained based on the maintenance value of each maintenance item in each maintenance cycle of the filling equipment, including:

[0081] Based on the type of filling equipment, different graded maintenance cycles are set for different filling equipment. Each graded maintenance cycle for each filling equipment includes multiple maintenance items.

[0082] according to Determine the index value of the health index of the filling equipment, wherein, The index value represents the health status of the filling equipment. N e This indicates the total number of filling devices. j Indicates the filling equipment number. E j Indicates the number is j Maintenance value of filling equipment It is a multiplication symbol;

[0083] according to The number is determined to be j Maintenance value of filling equipment Indicates the number is j The worst maintenance value among the daily maintenance items in the most recent daily maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a daily maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the weekly maintenance items in the most recent weekly maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a weekly maintenance schedule, then... =1; Indicates the number is jThe worst maintenance value among the monthly maintenance items in the most recent monthly maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a monthly maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the quarterly maintenance items in the most recent quarterly maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a quarterly maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the annual maintenance items in the most recent annual maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have an annual maintenance program, then... =1; L j Indicates the number is j The number of levels in the graded maintenance cycle of the filling equipment.

[0084] The above method for determining the health index of filling equipment takes into account the maintenance value of each filling device and adopts the worst maintenance value in the maintenance items. This method can fully reflect the safety hazards in the health index of filling equipment, so that the health index of filling equipment can accurately reflect the safety status of filling equipment.

[0085] In some specific embodiments, the weights of the health indicators of the filling equipment are adjusted based on historical hydrogen leakage data, including:

[0086] Obtain historical data on hydrogen leaks from different types of filling equipment;

[0087] Based on historical hydrogen leakage data of the different types of filling equipment, determine the shortest time interval for hydrogen leakage for each type of filling equipment;

[0088] Weights are assigned to different types of filling equipment based on the shortest time interval for hydrogen leakage for each type of filling equipment.

[0089] The weight of the health index of the filling equipment is determined based on the number of different types of filling equipment at the hydrogen refueling station and the weight of different types of filling equipment.

[0090] By adjusting the weights of the health indicators of the filling equipment using the methods described above, the different hydrogen leakage risk characteristics of different types of filling equipment can be reflected, making the safety data more accurate and reasonable.

[0091] In some specific embodiments, weights are set for different types of filling equipment based on the shortest time interval for hydrogen leakage for each type of filling equipment, including:

[0092] according to Set weights for different types of filling equipment, among which, The hydrogen refueling station filling equipment type number is k The weight of the filling equipment k This indicates the type number of the hydrogen refueling station's filling equipment. K This indicates the total number of types of hydrogen refueling equipment at hydrogen refueling stations. The hydrogen refueling station filling equipment type number is k The shortest time interval for hydrogen leakage in the filling equipment.

[0093] If the shortest time interval between hydrogen leaks in a certain type of filling equipment is relatively short, it indicates that the risk of hydrogen leaks in that type of filling equipment is relatively high. Based on safety principles, more attention should be paid to it, so the weight of the corresponding type of filling equipment should be increased.

[0094] In some specific embodiments, the weight of the health index of the filling equipment is determined based on the number of different types of filling equipment at the hydrogen refueling station and the weight of different types of filling equipment, including:

[0095] Based on the number of different types of filling equipment at the hydrogen refueling station, determine the proportion of different types of filling equipment to the total number of filling equipment at the hydrogen refueling station;

[0096] according to Determine the weights of the health indicators of the filling equipment. The index value represents the health status of the filling equipment. k This indicates the type number of the hydrogen refueling station's filling equipment. K This indicates the total number of types of hydrogen refueling equipment at hydrogen refueling stations. The hydrogen refueling station filling equipment type number is k The percentage of filling equipment in the total number of filling equipment types at hydrogen refueling stations. The hydrogen refueling station filling equipment type number is k The weight of the filling equipment.

[0097] By determining the weights of the health indicators of the filling equipment using the above method, safety data from different types of filling equipment can be integrated to obtain the weights of the overall health indicators of the filling equipment at the hydrogen refueling station.

[0098] Step 4: Determine the hydrogen refueling station safety assessment score of the safety management assessment model based on the evaluation scores of the sensor sensitivity index and the filling equipment health index; determine the hydrogen refueling station safety management plan based on the hydrogen refueling station safety assessment score.

[0099] By obtaining the evaluation scores of sensor sensitivity indicators and filling equipment health indicators, and determining the safety evaluation score of the hydrogen refueling station, the overall safety status of the hydrogen refueling station can be quantified, which facilitates the acquisition of the overall safety status of the hydrogen refueling station, the assessment of the overall safety status of the hydrogen refueling station, and the formulation or adjustment of the hydrogen refueling station safety management plan.

[0100] In some specific embodiments, the evaluation scores of the sensor sensitivity index and the evaluation scores of the filling equipment health index are used as the real and imaginary parts of a complex number, respectively, and the modulus of the complex number is calculated to obtain the safety evaluation score of the hydrogen refueling station.

[0101] In some specific embodiments, based on historical data of hydrogen refueling station safety assessment scores, thresholds corresponding to different safety conditions are determined for each hydrogen refueling station safety assessment score; based on the thresholds for different safety conditions and the current hydrogen refueling station safety assessment score, the current safety condition of the hydrogen refueling station is determined; and based on the current safety condition of the hydrogen refueling station, a hydrogen refueling station safety management plan is formulated or adjusted.

[0102] In the method described above in this embodiment, by establishing a safety management assessment model for hydrogen refueling stations, and based on the upper limit of the response time and upper limit of the detection range of each hydrogen detection sensor, as well as the positional relationship between the detection area corresponding to the hydrogen detection sensor and the area where the hydrogen leak point is located, the model can accurately obtain the index value, weight, and evaluation score of the sensitivity index of the hydrogen detection sensors at the hydrogen refueling station based on the detection effect. This allows for obtaining the overall situation and effect of the sensitivity of the hydrogen detection sensors at the hydrogen refueling station, and provides a quantitative reference for modifications to the selection, number, and location of hydrogen detection sensors. Furthermore, by obtaining the maintenance items for each maintenance item in the graded maintenance cycle of the filling equipment... By analyzing maintenance data and historical hydrogen leakage data from filling equipment, we can accurately obtain the indicator values, weights, and evaluation scores of the filling equipment's health indicators. This allows us to understand the overall health status of various types of filling equipment at the hydrogen refueling station, facilitating the evaluation and adjustment of maintenance plans for different types of equipment. Furthermore, by acquiring the evaluation scores of sensor sensitivity indicators and filling equipment health indicators, and determining the hydrogen refueling station's safety evaluation score, we can quantify the overall safety status of the hydrogen refueling station. This facilitates the assessment of the overall safety status of the hydrogen refueling station and the development or adjustment of its safety management plan.

[0103] Those skilled in the art can change the above order without departing from the scope of protection of this invention.

[0104] Another embodiment of the present invention provides a hydrogen refueling station safety management system, such as... Figure 2 As shown, it includes:

[0105] The evaluation model establishment module 100 is used to establish a hydrogen refueling station safety management evaluation model. The evaluation indicators of the safety management evaluation model include sensor sensitivity indicators and filling equipment health indicators.

[0106] The evaluation index acquisition module 200 is used to acquire evaluation scores for sensor sensitivity and filling equipment health. Multiple detection zones are set up at the hydrogen refueling station, with at least one sensor for hydrogen detection deployed in each zone. The sensor sensitivity index value is determined based on the upper limit of each sensor's response time and upper limit of its detection range. The weight of the sensor sensitivity index is adjusted based on the positional relationship between the sensor's corresponding detection zone and the area where the hydrogen leak point is located. The evaluation score of the sensor sensitivity index is determined based on its index value and weight. The maintenance status of each maintenance item in the tiered maintenance cycle of the filling equipment is obtained. The maintenance status of the tiered maintenance cycle of the filling equipment is mapped to a preset score range to obtain the maintenance value of each maintenance item in the tiered maintenance cycle of the filling equipment. The index value of the filling equipment health index is obtained based on the maintenance value of each maintenance item in each tiered maintenance cycle of the filling equipment. The weight of the filling equipment health index is adjusted based on historical hydrogen leak data of the filling equipment. The evaluation score of the filling equipment health index is determined based on its index value and weight.

[0107] The hydrogen refueling station safety management module 300 is used to determine the hydrogen refueling station safety assessment score of the safety management assessment model based on the assessment scores of the sensor sensitivity index and the health index of the filling equipment; and to determine the hydrogen refueling station safety management plan based on the hydrogen refueling station safety assessment score.

[0108] Regarding the system in the above embodiments, the specific ways in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0109] In this embodiment, the present invention establishes a safety management assessment model for hydrogen refueling stations. Based on the upper limit of the response time and detection range of each hydrogen detection sensor, and the positional relationship between the corresponding detection area of ​​the hydrogen detection sensor and the area where the hydrogen leak point is located, the model can accurately obtain the index value, weight, and evaluation score of the sensitivity index of the hydrogen detection sensors at the hydrogen refueling station based on the detection effect. This allows for the acquisition of the overall situation and effect of the hydrogen detection sensor sensitivity at the hydrogen refueling station, providing a quantitative reference for modifications to the selection, number, and location of hydrogen detection sensors. Furthermore, by obtaining the maintenance status of each maintenance item in the graded maintenance cycle of the filling equipment, the model can provide a comprehensive assessment of the hydrogen detection sensor sensitivity. By analyzing historical data on the maintenance status and hydrogen leakage of filling equipment, the system can accurately obtain the index values, weights, and evaluation scores of the filling equipment's health indicators. This allows for the assessment of the overall health status of various types of filling equipment at the hydrogen refueling station, facilitating the evaluation and adjustment of maintenance plans for different types of equipment. Furthermore, by acquiring the evaluation scores of sensor sensitivity indicators and filling equipment health indicators, and determining the hydrogen refueling station's safety assessment score, the system can quantify the overall safety status of the hydrogen refueling station. This facilitates the assessment of the overall safety status of the hydrogen refueling station and the development or adjustment of its safety management plan.

[0110] Based on the same inventive concept, the present invention also provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of the aforementioned hydrogen refueling station safety management method.

[0111] Any modifications, additions, and equivalent substitutions made within the scope of the principles of this invention shall still fall within the patent coverage of this invention.

Claims

1. A method for safety management of hydrogen refueling stations, characterized in that, The method includes: A safety management assessment model for hydrogen refueling stations is established, and the assessment indicators of the safety management assessment model include sensor sensitivity indicators and filling equipment health indicators. Multiple detection zones are set up at the hydrogen refueling station, and at least one sensor for hydrogen detection is arranged in each detection zone; the index value of the sensor sensitivity index is determined according to the upper limit of the response time and the upper limit of the detection range of each sensor; the weight of the sensor sensitivity index is adjusted according to the positional relationship between the detection zone corresponding to the sensor and the area where the hydrogen leak point is located; the evaluation score of the sensor sensitivity index is determined according to the index value and weight of the sensor sensitivity index. The process involves: acquiring the maintenance status of each maintenance item in the graded maintenance cycle of the filling equipment; mapping the maintenance status of the graded maintenance cycle of the filling equipment to a preset score range to obtain the maintenance value of each maintenance item in the graded maintenance cycle of the filling equipment; obtaining the index value of the health index of the filling equipment based on the maintenance value of each maintenance item in each graded maintenance cycle of the filling equipment; adjusting the weight of the health index of the filling equipment based on the historical hydrogen leakage data of the filling equipment; and determining the evaluation score of the health index of the filling equipment based on the index value and weight of the health index of the filling equipment. Based on the evaluation scores of the sensor sensitivity index and the evaluation scores of the filling equipment health index, the hydrogen refueling station safety evaluation score of the safety management evaluation model is determined; based on the hydrogen refueling station safety evaluation score, the hydrogen refueling station safety management plan is determined.

2. The method as described in claim 1, characterized in that, Based on the upper limit of the response time and the upper limit of the detection range of each sensor, the index value of the sensor sensitivity index is determined, including: Obtain the upper limit of response time and the upper limit of detection range for each sensor, convert different upper limit values ​​of response time to the same unit of measurement, and convert different upper limit values ​​of detection range to the same unit of measurement; according to Determine the index value of the sensor sensitivity index, wherein, The index value represents the sensor's sensitivity index. N s This indicates the total number of sensors used for hydrogen detection. i This indicates the sensor number used for hydrogen detection. R i Indicates the number is i The upper limit of the detection range of the sensor used for hydrogen detection. t i Indicates the number is i The upper limit of the response time of the sensor used for hydrogen detection.

3. The method as described in claim 1, characterized in that, Based on the positional relationship between the sensor's detection area and the area where the hydrogen leak point is located, the weights of the sensor's sensitivity index are adjusted, including: Acquire the detection data from each of the sensors; Based on the detection data, the sensor that detected hydrogen was identified; The direction of hydrogen diffusion is obtained based on the location of the sensor that detected hydrogen and the time when hydrogen was detected. The hydrogen diffusion area is determined based on the hydrogen diffusion direction and the corresponding detection area of ​​the sensor that detected the hydrogen. The hydrogen diffusion area and its adjacent detection area are inspected to obtain the location of the hydrogen leak point; Obtain the minimum gas path distance between the hydrogen leak point and the sensor that detected the hydrogen; The weight of the sensor sensitivity index is adjusted based on the location of the hydrogen leak point, the hydrogen diffusion area and its adjacent detection area, and the minimum gas path distance.

4. The method as described in claim 3, characterized in that, Based on the location of the hydrogen leak point, the hydrogen diffusion area and its adjacent detection area, and the minimum gas path distance, the weight of the sensor sensitivity index is adjusted, including: If the hydrogen leak point is located within the hydrogen diffusion area and the minimum gas path distance does not exceed the distance between the two farthest points in the hydrogen diffusion area, then the weight of the sensor sensitivity index is increased; if the hydrogen leak point is located outside the hydrogen diffusion area and its adjacent detection area, or the minimum gas path distance exceeds the distance between the two farthest points in the hydrogen diffusion area, then the weight of the sensor sensitivity index is decreased.

5. The method as described in claim 1, characterized in that, Based on the maintenance value of each maintenance item in each maintenance cycle of the filling equipment, the index value of the health index of the filling equipment is obtained, including: Based on the type of filling equipment, different graded maintenance cycles are set for different filling equipment. Each graded maintenance cycle for each filling equipment includes multiple maintenance items. according to Determine the index value of the health index of the filling equipment, wherein, The index value represents the health status of the filling equipment. N e This indicates the total number of filling devices. j Indicates the filling equipment number. E j Indicates the number is j Maintenance values ​​for filling equipment; according to The number is determined to be j Maintenance value of filling equipment Indicates the number is j The worst maintenance value among the daily maintenance items in the most recent daily maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a daily maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the weekly maintenance items in the most recent weekly maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a weekly maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the monthly maintenance items in the most recent monthly maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a monthly maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the quarterly maintenance items in the most recent quarterly maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have a quarterly maintenance schedule, then... =1; Indicates the number is j The worst maintenance value among the annual maintenance items in the most recent annual maintenance cycle for the filling equipment, if the number is j If the filling equipment does not have an annual maintenance program, then... =1; L j Indicates the number is j The number of levels in the graded maintenance cycle of the filling equipment.

6. The method as described in claim 1, characterized in that, Based on historical hydrogen leakage data from the filling equipment, the weights of the health indicators of the filling equipment are adjusted, including: Obtain historical data on hydrogen leaks from different types of filling equipment; Based on historical hydrogen leakage data of the different types of filling equipment, determine the shortest time interval for hydrogen leakage for each type of filling equipment; Weights are assigned to different types of filling equipment based on the shortest time interval for hydrogen leakage for each type of filling equipment. The weight of the health index of the filling equipment is determined based on the number of different types of filling equipment at the hydrogen refueling station and the weight of different types of filling equipment.

7. The method as described in claim 6, characterized in that, Weights are assigned to different types of filling equipment based on the shortest time interval for hydrogen leakage for each type of filling equipment, including: according to Set weights for different types of filling equipment, among which, The hydrogen refueling station filling equipment type number is k The weight of the filling equipment k This indicates the type number of the hydrogen refueling station's filling equipment. K This indicates the total number of types of hydrogen refueling equipment at hydrogen refueling stations. The hydrogen refueling station filling equipment type number is k The shortest time interval for hydrogen leakage in the filling equipment.

8. The method as described in claim 6, characterized in that, The weights of the health indicators for the filling equipment are determined based on the number of different types of filling equipment at the hydrogen refueling station and the weights of different types of filling equipment, including: Based on the number of different types of filling equipment at the hydrogen refueling station, determine the proportion of different types of filling equipment to the total number of filling equipment at the hydrogen refueling station; according to Determine the weights of the health indicators of the filling equipment. The index value represents the health status of the filling equipment. k This indicates the type number of the hydrogen refueling station's filling equipment. K This indicates the total number of types of hydrogen refueling equipment at hydrogen refueling stations. The hydrogen refueling station filling equipment type number is k The percentage of filling equipment in the total number of filling equipment types at hydrogen refueling stations. The hydrogen refueling station filling equipment type number is k The weight of the filling equipment.

9. A safety management system for hydrogen refueling stations, characterized in that, The system includes: The evaluation model building module is used to build a safety management evaluation model for hydrogen refueling stations. The evaluation indicators of the safety management evaluation model include sensor sensitivity indicators and filling equipment health indicators. An evaluation index acquisition module is used to collect evaluation scores for sensor sensitivity and filling equipment health. Multiple detection zones are set up at the hydrogen refueling station, with at least one sensor for hydrogen detection deployed in each zone. The sensor sensitivity index value is determined based on the upper limit of each sensor's response time and upper limit of its detection range. The weight of the sensor sensitivity index is adjusted based on the positional relationship between the sensor's corresponding detection zone and the area where the hydrogen leak point is located. The evaluation score of the sensor sensitivity index is determined based on its index value and weight. The module also acquires the maintenance status of each maintenance item in the tiered maintenance cycle of the filling equipment. The maintenance status of the tiered maintenance cycle is mapped to a preset score range to obtain the maintenance value of each maintenance item in the tiered maintenance cycle. The index value of the filling equipment health index is obtained based on the maintenance value of each maintenance item in each tiered maintenance cycle. The weight of the filling equipment health index is adjusted based on historical hydrogen leak data. Finally, the evaluation score of the filling equipment health index is determined based on its index value and weight. The hydrogen refueling station safety management module is used to determine the hydrogen refueling station safety assessment score of the safety management assessment model based on the assessment scores of the sensor sensitivity index and the health index of the filling equipment; and to determine the hydrogen refueling station safety management plan based on the hydrogen refueling station safety assessment score.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1 to 8.

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