Safety evaluation method and system of liquid hydrogen loading skid filling system and electronic equipment

Abstract

The invention provides a safety evaluation method and system for a liquid hydrogen loading pry filling system and electronic equipment, and relates to the technical field of hydrogen energy, when the safety evaluation is carried out on the liquid hydrogen loading pry filling system, index data of the liquid hydrogen loading pry filling system are firstly obtained in real time; wherein the index data is monitoring data corresponding to each scheme layer index in a pre-established safety evaluation index system; based on the index data and a pre-established comment set, determining an evaluation matrix corresponding to each criterion layer index in the safety evaluation index system; wherein each criterion layer index corresponds to a plurality of scheme layer indexes; and based on the evaluation matrix corresponding to each criterion layer index and a pre-established index weight set, performing comprehensive safety evaluation on the liquid hydrogen loading pry filling system to obtain a comprehensive evaluation result. In this way, real-time dynamic monitoring of the liquid hydrogen loading pry filling system is achieved, the evaluation result is more objective and effective, and therefore the safety of the whole filling process is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen energy technology, and in particular to a safety evaluation method, system and electronic equipment for a liquid hydrogen loading skid filling system. Background Art

[0002] The liquid hydrogen loading skid filling system is used to transport liquid hydrogen from the liquid hydrogen plant to the liquid hydrogen tank truck. It is a system that fills liquid hydrogen from the liquid hydrogen storage tank into the liquid hydrogen tank of the liquid hydrogen tank truck. Liquid hydrogen has an extremely low temperature and a wide explosion range. Once it leaks, it is easy to cause dangers such as frostbite and explosion. In order to ensure the safety of the entire filling process, it is necessary to complete the real-time safety evaluation of the liquid hydrogen loading skid filling system to achieve analysis and evaluation of safety work.

[0003] However, liquid hydrogen is mostly used in the military field, and there is currently no method for safety evaluation of liquid hydrogen loading skid filling systems. The traditional expert scoring method is a static evaluation process and is also highly subjective. Summary of the invention

[0004] The purpose of the present invention is to provide a safety evaluation method, system and electronic equipment for a liquid hydrogen loading skid filling system, so as to realize real-time dynamic monitoring of the liquid hydrogen loading skid filling system, improve the objectivity of the evaluation result, and thus ensure the safety of the entire filling process.

[0005] In a first aspect, an embodiment of the present invention provides a safety evaluation method for a liquid hydrogen loading skid filling system, comprising:

[0006] Acquire the index data of the liquid hydrogen loading skid filling system in real time; wherein the index data is the monitoring data corresponding to the indicators of each scheme layer in the pre-established safety evaluation index system;

[0007] Based on the indicator data and the pre-established comment set, determine the evaluation matrix corresponding to each criterion-level indicator in the safety evaluation indicator system; wherein the comment set includes data requirements for solution-level indicators corresponding to different risk levels, and each criterion-level indicator corresponds to a plurality of solution-level indicators;

[0008] Based on the evaluation matrix corresponding to each of the criterion layer indicators and the pre-established indicator weight set, a comprehensive safety evaluation is performed on the liquid hydrogen loading skid filling system to obtain a comprehensive evaluation result.

[0009] Furthermore, the determining of the evaluation matrix corresponding to each criterion layer indicator in the safety evaluation indicator system based on the indicator data and the pre-established comment set includes:

[0010] When the solution-level indicator is a quantitative indicator, the evaluation matrix of the solution-level indicator is determined by comparing the monitoring data of the solution-level indicator with the corresponding threshold value in the comment set;

[0011] When the solution-level indicator is a qualitative indicator, an evaluation matrix of the solution-level indicator is determined based on the severity level and occurrence frequency corresponding to the monitoring data of the solution-level indicator;

[0012] Based on the evaluation matrix of each of the scheme-level indicators corresponding to each of the criterion-level indicators, the evaluation matrix corresponding to each of the criterion-level indicators is determined.

[0013] Furthermore, the indicator weight set includes a first weight of each of the scheme-level indicators and a second weight of each of the criterion-level indicators; based on the evaluation matrix corresponding to each of the criterion-level indicators and the pre-established indicator weight set, a comprehensive safety evaluation is performed on the liquid hydrogen loading skid filling system to obtain a comprehensive evaluation result, including:

[0014] Based on the evaluation matrix corresponding to each of the criterion layer indicators and the first weight of each of the scheme layer indicators corresponding to each of the criterion layer indicators, a single factor evaluation matrix corresponding to each of the criterion layer indicators is calculated;

[0015] Based on the single factor evaluation matrix corresponding to each of the criterion layer indicators and the second weight of each of the criterion layer indicators, a comprehensive evaluation matrix is ​​calculated;

[0016] Based on the comprehensive evaluation matrix, a comprehensive evaluation result of the liquid hydrogen loading skid filling system is determined.

[0017] Furthermore, the comprehensive evaluation result of the liquid hydrogen loading skid filling system is determined based on the comprehensive evaluation matrix, including:

[0018] According to the maximum membership principle, determining the security level corresponding to the comprehensive evaluation matrix;

[0019] The safety level is determined as a comprehensive evaluation result of the liquid hydrogen loading skid filling system.

[0020] Furthermore, before the real-time acquisition of the index data of the liquid hydrogen loading skid filling system, the safety evaluation method of the liquid hydrogen loading skid filling system further includes:

[0021] Establishing a safety evaluation index system for the liquid hydrogen loading skid filling system, wherein the safety evaluation index system includes a plurality of criterion layer indicators and a plurality of scheme layer indicators corresponding to each of the criterion layer indicators;

[0022] Based on the safety evaluation index system, the Analytic Hierarchy Process (AHP) is used to establish the index weight set of the liquid hydrogen loading skid filling system;

[0023] Based on each of the scheme-level indicators, a comment set for the liquid hydrogen loading skid filling system is established.

[0024] Furthermore, the criteria-level indicators in the safety evaluation index system include human factors, equipment factors, safety management and environmental factors; the program-level indicators corresponding to the human factors include human safety awareness, human operating level, human physiological factors and human psychological factors; the program-level indicators corresponding to the equipment factors include valves and pipelines, pipeline flow meters, pressure indicators and temperature elements; the program-level indicators corresponding to the safety management include safety education and training, safety emergency plans, safety warnings and signs, and safety systems and specifications; the program-level indicators corresponding to the environmental factors include weather conditions, operation time and safe distance.

[0025] In a second aspect, an embodiment of the present invention further provides a safety evaluation system for a liquid hydrogen loading skid filling system, comprising:

[0026] An acquisition module is used to acquire the index data of the liquid hydrogen loading skid filling system in real time; wherein the index data is the monitoring data corresponding to the indicators of each scheme layer in the pre-established safety evaluation index system;

[0027] A determination module, for determining an evaluation matrix corresponding to each criterion-level indicator in the safety evaluation indicator system based on the indicator data and a pre-established comment set; wherein the comment set includes data requirements for solution-level indicators corresponding to different risk levels, and each criterion-level indicator corresponds to a plurality of solution-level indicators;

[0028] The evaluation module is used to perform a comprehensive safety evaluation on the liquid hydrogen loading skid filling system based on the evaluation matrix corresponding to each criterion layer indicator and a pre-established indicator weight set to obtain a comprehensive evaluation result.

[0029] Furthermore, the determination module is specifically used for:

[0030] When the solution-level indicator is a quantitative indicator, the evaluation matrix of the solution-level indicator is determined by comparing the monitoring data of the solution-level indicator with the corresponding threshold value in the comment set;

[0031] When the solution-level indicator is a qualitative indicator, an evaluation matrix of the solution-level indicator is determined based on the severity level and occurrence frequency corresponding to the monitoring data of the solution-level indicator;

[0032] Based on the evaluation matrix of each of the scheme-level indicators corresponding to each of the criterion-level indicators, the evaluation matrix corresponding to each of the criterion-level indicators is determined.

[0033] Furthermore, the indicator weight set includes a first weight of each of the scheme-level indicators and a second weight of each of the criterion-level indicators; and the evaluation module is specifically used for:

[0034] Based on the evaluation matrix corresponding to each of the criterion layer indicators and the first weight of each of the scheme layer indicators corresponding to each of the criterion layer indicators, a single factor evaluation matrix corresponding to each of the criterion layer indicators is calculated;

[0035] Based on the single factor evaluation matrix corresponding to each of the criterion layer indicators and the second weight of each of the criterion layer indicators, a comprehensive evaluation matrix is ​​calculated;

[0036] Based on the comprehensive evaluation matrix, a comprehensive evaluation result of the liquid hydrogen loading skid filling system is determined.

[0037] In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the computer program, the safety assessment method for the liquid hydrogen loading skid filling system of the first aspect is implemented.

[0038] The safety evaluation method, system and electronic equipment for the liquid hydrogen loading skid filling system provided in the embodiment of the present invention first obtain the index data of the liquid hydrogen loading skid filling system in real time when conducting the safety evaluation of the liquid hydrogen loading skid filling system; wherein the index data is the monitoring data corresponding to each scheme layer index in the pre-established safety evaluation index system; based on the index data and the pre-established comment set, the evaluation matrix corresponding to each criterion layer index in the safety evaluation index system is determined; wherein the comment set includes the data requirements of the scheme layer index corresponding to different risk levels, and each criterion layer index corresponds to multiple scheme layer indexes; based on the evaluation matrix corresponding to each criterion layer index and the pre-established indicator weight set, the liquid hydrogen loading skid filling system is comprehensively evaluated for safety, and a comprehensive evaluation result is obtained. In this way, real-time dynamic monitoring of the liquid hydrogen loading skid filling system is realized, and compared with the expert scoring method, this safety evaluation method based on the evaluation matrix has more objective and effective evaluation results, thereby ensuring the safety of the entire filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A schematic flow chart of a safety assessment method for a liquid hydrogen loading skid filling system provided in an embodiment of the present invention;

[0041] Figure 2 A schematic flow chart of another safety assessment method for a liquid hydrogen loading skid filling system provided in an embodiment of the present invention;

[0042] Figure 3 A schematic diagram of the structure of a safety evaluation system for a liquid hydrogen loading skid filling system provided in an embodiment of the present invention;

[0043] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Currently, there is no safety evaluation method for liquid hydrogen loading skid filling system that can be monitored in real time, and the traditional expert scoring method is a static evaluation process and is also highly subjective. Based on this, a safety evaluation method, system and electronic equipment for liquid hydrogen loading skid filling system provided in an embodiment of the present invention can maximize the solution to safety issues in the liquid hydrogen loading skid filling process and realize dynamic monitoring and evaluation of the entire operation process.

[0046] To facilitate understanding of this embodiment, a safety evaluation method for a liquid hydrogen loading skid filling system disclosed in an embodiment of the present invention is first introduced in detail.

[0047] The embodiment of the present invention provides a safety evaluation method for a liquid hydrogen loading skid filling system, which can be executed by an electronic device with data processing capability, such as a desktop computer, a laptop computer, a tablet computer, or a smart phone. Figure 1 The flowchart of a safety evaluation method for a liquid hydrogen loading skid filling system is shown, and the method mainly includes the following steps S102 to S106:

[0048] Step S102, obtaining index data of the liquid hydrogen loading skid filling system in real time; wherein the index data is monitoring data corresponding to each scheme layer index in a pre-established safety evaluation index system.

[0049] In the embodiment of the present invention, a safety evaluation index system is pre-established, which includes multiple criterion layer indicators and multiple scheme layer indicators corresponding to each criterion layer indicator, that is, the criterion layer indicator is the upper layer indicator of the scheme layer indicator. The indicator data can be obtained by real-time monitoring of each scheme layer indicator of the liquid hydrogen loading skid filling system.

[0050] Solution-level indicators may include quantitative indicators and qualitative indicators. For quantitative indicators, the monitoring data corresponding to each solution-level indicator includes multiple data values ​​collected at preset intervals within a certain period; for example, if the solution-level indicator is a pressure indicator, with a period of 10s, the pressure value is measured once per second (that is, the preset duration is 1s), then the monitoring data corresponding to the pressure indicator includes 10 pressure values. For qualitative indicators, the monitoring data corresponding to each solution-level indicator includes the judgment results of multiple field experts in terms of severity level and frequency of occurrence; for example, if the solution-level indicator is the human operating level, then the monitoring data corresponding to the human operating level may include the judgment results of 10 field experts on the frequency of operating errors caused by low human operating level during the entire liquid hydrogen loading skid loading process and the severity level of the accident consequences.

[0051] Step S104, based on the indicator data and the pre-established comment set, determine the evaluation matrix corresponding to each criterion level indicator in the safety evaluation indicator system; wherein the comment set includes data requirements for solution level indicators corresponding to different risk levels, and each criterion level indicator corresponds to multiple solution level indicators.

[0052] The evaluation matrix of each scheme-level indicator can be first obtained based on the indicator data and the pre-established comment set, and then the evaluation matrix corresponding to each criterion-level indicator can be determined based on the evaluation matrices of each scheme-level indicator corresponding to each criterion-level indicator. The evaluation matrix corresponding to the criterion-level indicator is composed of the evaluation matrices of each scheme-level indicator, and each row of the evaluation matrix corresponding to the criterion-level indicator corresponds to an evaluation matrix of a scheme-level indicator. For example, if the evaluation matrix of the scheme-level indicator is a matrix with one row and three columns, and the number of scheme-level indicators corresponding to the criterion-level indicator is four, then the evaluation matrix corresponding to the criterion-level indicator is a matrix with four rows and three columns.

[0053] When determining the evaluation matrix of program-level indicators, quantitative indicators and qualitative indicators are treated differently: when the program-level indicators are quantitative indicators, the evaluation matrix of the program-level indicators is determined by comparing the monitoring data of the program-level indicators with the corresponding thresholds in the comment set; when the program-level indicators are qualitative indicators, the evaluation matrix of the program-level indicators is determined based on the severity level and occurrence frequency corresponding to the monitoring data of the program-level indicators.

[0054] Specifically, 1) For quantitative indicators, thresholds are determined based on real-time monitoring data to give an evaluation matrix. For multiple data values ​​of each solution-level indicator, the risk level corresponding to each data value can be determined based on the comparison results of each data value of the solution-level indicator with the corresponding threshold; then, based on the risk levels corresponding to each data value, the proportion of each risk level is statistically obtained; finally, based on the proportion of each risk level, the evaluation matrix of the solution-level indicator is generated.

[0055] For example, the pressure in the pipeline is not constant, but fluctuates within a certain range. Therefore, the pressure value can be measured once a second, and the pressure statistics can be performed with a period of 10 seconds to finally establish the evaluation matrix R.

[0056] Table 1

[0057]

[0058] For example, establish the pressure level evaluation set judgment standard as shown in Table 1, read the pressure from the pressure indicator, and this pressure is the pressure measured in the liquid hydrogen filling pipeline. If the pressure value measured for 10s is within the safe range 8 times and within the general range 2 times, the pressure evaluation matrix is: R = (0.8, 0.2, 0).

[0059] 2) For qualitative indicators, experts in the field make judgments based on Table 2. Each factor is considered comprehensively from the severity level and frequency of the consequences of the factor. The high risk, medium risk and low risk in Table 2 correspond to the three risk levels of dangerous, general and safe, as shown in Table 3.

[0060] Table 2

[0061]

[0062] Note: H represents high risk, which is unacceptable in the project and needs to be further reduced; M represents medium risk, which needs to be further reduced by applying the ALARP principle. If it cannot be reduced, it needs to be tolerated after obtaining the approval of Party A; L represents low risk, which is a widely acceptable risk and does not require further processing.

[0063] Table 3

[0064] Comments Safety generally Danger Risk assessment results L M H

[0065] For each solution-level indicator, we can first determine the risk level corresponding to each domain expert based on the judgment results of each domain expert in terms of severity level and occurrence frequency corresponding to the solution-level indicator, by looking up the correspondence between the preset risk level and the severity level and occurrence frequency (as shown in Table 2), and then, based on the risk levels corresponding to the experts in each domain, we can statistically obtain the proportion of each risk level; finally, based on the proportion of each risk level, we can generate an evaluation matrix for the solution-level indicator.

[0066] For example, the program-level indicator is the human operating level. If one domain expert determines that the frequency of occurrence is occasional and the severity of the accident consequences is severe, then Table 2 shows that the corresponding risk level of the domain expert is H, that is, the risk assessment result is dangerous. After all 10 domain experts have made their judgments, the risk levels are counted. If 7 domain experts have a corresponding risk level of M and 3 domain experts have a corresponding risk level of H, the evaluation matrix of the human operating level is: R = (0, 0.7, 0.3).

[0067] Step S106, based on the evaluation matrix corresponding to each criterion layer indicator and the pre-established indicator weight set, a comprehensive safety evaluation is performed on the liquid hydrogen loading skid filling system to obtain a comprehensive evaluation result.

[0068] The indicator weight set may include a first weight of each scheme-level indicator and a second weight of each criterion-level indicator; based on this, step S106 may be implemented through the following process: based on the evaluation matrix corresponding to each criterion-level indicator and the first weight of each scheme-level indicator corresponding to each criterion-level indicator, a single factor evaluation matrix corresponding to each criterion-level indicator is calculated; based on the single factor evaluation matrix corresponding to each criterion-level indicator and the second weight of each criterion-level indicator, a comprehensive evaluation matrix is ​​calculated; based on the comprehensive evaluation matrix, a comprehensive evaluation result of the liquid hydrogen loading skid filling system is determined.

[0069] Taking the four criteria level indicators as an example, the single factor evaluation matrix can be expressed as C i (i=1,2,3,4), C i =W i *R i , W i represents the first weight of the i-th solution level indicator, R i represents the evaluation matrix corresponding to the i-th criterion layer indicator; the comprehensive evaluation matrix can be expressed as C, C = W*R, W represents the matrix composed of the second weights of each criterion layer indicator (one row and four columns), R represents the matrix composed of the single factor evaluation matrix corresponding to each criterion layer indicator, The safety level corresponding to the comprehensive evaluation matrix can be determined according to the maximum membership principle, and the safety level can be determined as the comprehensive evaluation result of the liquid hydrogen loading skid filling system.

[0070] For example, the comprehensive evaluation matrix C = (0.8, 0.2, 0) is matched with the comment set V = (safe, general, dangerous), and according to the maximum membership principle (0.8>0.2>0), the safety level of the liquid hydrogen loading skid filling system is determined to be 0.8, which corresponds to the safety level.

[0071] The safety evaluation method for the liquid hydrogen loading skid filling system provided in the embodiment of the present invention first obtains the index data of the liquid hydrogen loading skid filling system in real time when conducting the safety evaluation on the liquid hydrogen loading skid filling system; wherein the index data is the monitoring data corresponding to each scheme layer index in the pre-established safety evaluation index system; based on the index data and the pre-established comment set, the evaluation matrix corresponding to each criterion layer index in the safety evaluation index system is determined; wherein the comment set includes the data requirements of the scheme layer index corresponding to different risk levels, and each criterion layer index corresponds to multiple scheme layer indexes; based on the evaluation matrix corresponding to each criterion layer index and the pre-established indicator weight set, the liquid hydrogen loading skid filling system is comprehensively evaluated for safety, and a comprehensive evaluation result is obtained. In this way, real-time dynamic monitoring of the liquid hydrogen loading skid filling system is realized, and compared with the expert scoring method, this safety evaluation method based on the evaluation matrix has more objective and effective evaluation results, thereby ensuring the safety of the entire filling process.

[0072] Before executing step S102, it is necessary to first establish a safety evaluation index system, an index weight set and a comment set for the liquid hydrogen loading skid filling system. Then, based on the established safety evaluation index system, an index weight set and a comment set, a real-time dynamic safety evaluation of the liquid hydrogen loading skid filling system can be performed.

[0073] Based on this, the above method also includes:

[0074] 1. Establish a safety evaluation index system for the liquid hydrogen loading skid filling system. The safety evaluation index system includes multiple criterion-level indicators and multiple program-level indicators corresponding to each criterion-level indicator;

[0075] 2. Based on the safety evaluation index system, the analytic hierarchy process is used to establish the index weight set of the liquid hydrogen loading skid filling system;

[0076] 3. Based on the indicators at each solution level, establish a comment set for the liquid hydrogen loading skid filling system.

[0077] The comment set includes data requirements for program-level indicators corresponding to different risk levels, and the indicator weight set includes the first weight of each program-level indicator and the second weight of each criterion-level indicator.

[0078] In some possible embodiments, for the establishment of a safety evaluation index system: 1) Safety management can ensure system safety from the four factors of people, machines, environment, and management, and on this basis, establish the criteria-level indicators of the safety evaluation index system; 2) For the establishment of the program-level indicators, the main indicators are selected through statistical analysis based on the safety design documents of the liquid hydrogen loading skid filling system (such as Design Failure Mode and Effects Analysis (DFMEA), Hazard and Operability Study (HAZOP), etc.) and reference to liquefied natural gas filling accident cases. Generally, different safety evaluation index systems are established for different evaluation objects.

[0079] Optionally, as shown in Table 4 below, the criteria layer indicators in the safety evaluation index system U (located in the target layer) may include human factors U1, equipment factors U2, safety management U3 and environmental factors U4; the program layer indicators corresponding to the human factor U1 may include human safety awareness U 11 , Human operation level U 12 , Human physiological factors 13 and human psychological factors 14 ; The solution-level indicators corresponding to the equipment factor U2 can include valves and pipelines U 21 , Pipeline flow meter U 22 , Pressure indicator U 23 and temperature element U 24 ; The program-level indicators corresponding to safety management U3 may include safety education and training U 31 , Safety Emergency Plan 32 , Safety Warnings and Signs 33 and safety systems and regulations 34 ; The solution level indicators corresponding to the environmental factor U4 may include weather conditions U 41 , operation duration U 42 and safety distance U 43 .

[0080] Table 4

[0081]

[0082]

[0083] In some possible embodiments, the method for establishing the indicator weight set is the hierarchical analysis method, which refers to a decision-making method that decomposes the elements related to the decision into levels such as goals, criteria, and plans, and performs qualitative and quantitative analysis on this basis. Taking the first weight of the plan-level indicator as an example, the method for establishing the weight is as follows: Taking the criterion-level indicator Ui As a judgment matrix, according to scaling theory, U i1 , U i2 , …, U in Make pairwise comparisons to determine the relative importance of each factor. ij , and thus establish the judgment matrix B i (Relative importance b ij is the judgment matrix B i In order to determine the accuracy and rationality of the weights, the judgment matrix B i Perform consistency check. The consistency check method is as follows: ① Calculate the judgment matrix B i The maximum eigenvalue λ max ② Calculate the consistency index CI of the judgment matrix, n is the number of scheme-level indicators included in the criterion-level indicators. ③ Based on the average consistency index RI, calculate the consistency ratio CR of the judgment matrix, CR = CI / RI; when CR < 0.1, it is considered that the consistency of the judgment matrix meets the requirements, otherwise continue to compare the importance and re-test the consistency until the consistency meets the requirements. Finally, the judgment matrix B i The element b in ij Normalization is performed to calculate the evaluation index weight vector composed of the first weights of the scheme-level indicators. The purpose of normalization is to eliminate the dimensional influence between different indicators so that the data are at the same order of magnitude and suitable for comprehensive comparative evaluation.

[0084] The above i1 , U i2 , …, U in The pairwise comparison refers to comparing the influence of each solution layer indicator relative to the criterion layer indicator above it. The judgment matrix established in the embodiment can be shown in Table 5 below:

[0085] Table 5

[0086] <![CDATA[U i ]]> <![CDATA[U i1 ]]> <![CDATA[U i2 ]]> … <![CDATA[U in ]]> <![CDATA[U i1 ]]> <![CDATA[b 11 ]]> <![CDATA[b 12 ]]> … <![CDATA[b 11 ]]> <![CDATA[U i2 ]]> <![CDATA[b 21 ]]> <![CDATA[b 22 ]]> … <![CDATA[b 2n ]]> … … … … <![CDATA[U in ]]> <![CDATA[b n1 ]]> <![CDATA[b n2 ]]> … <![CDATA[b nn ]]>

[0087] This results in the judgment matrix:

[0088]

[0089] Judgment Matrix B i It has the following properties:

[0090] (1)b ij >0; (2) b ij =1 / b ij ; (3) b ii =1.

[0091] In one possible implementation, the scale b of the judgment matrix ij As shown in Table 6 below.

[0092] Table 6

[0093]

[0094] The above average consistency index RI can be obtained by referring to the consistency index table shown in Table 7 below: According to the order of the judgment matrix, find the corresponding RI value.

[0095] Table 7

[0096]

[0097]

[0098] The process of normalizing the judgment matrix and determining the indicator weights can be as follows:

[0099] Solve for the eigenvectors:

[0100] Normalization:

[0101] For ease of understanding, the present invention also provides another safety evaluation method for a liquid hydrogen loading skid filling system. Figure 2 As shown, the method includes:

[0102] Step S202, establishing a safety evaluation index system U for the liquid hydrogen loading skid filling system.

[0103] For example, as shown in Table 4, the first-level indicator influencing factor set (i.e., the set composed of the criterion layer indicators) in the safety evaluation index system of the liquid hydrogen loading skid filling system is: U = {U1, U2, U3, U4}; the second-level indicator influencing factor set (i.e., the set composed of the scheme layer indicators) is: U1 = {U2, U3, U4}; 11 , U 12 , U 13 , U 14},U2={U 21 , U 22 , U 23 , U 24},U3={U 31 , U 32 , U 33 , U 34},U4={U 41 , U 42 , U 43}.

[0104] Step S204, using the analytic hierarchy process to determine the index weight set of the liquid hydrogen loading skid filling system.

[0105] The weight mainly reflects the proportion of a factor indicator in the entire evaluation system. Here, the analytic hierarchy process is used to assign weights. For example, taking Table 4 as an example, the indicator weight set includes the criterion layer weight W and the scheme layer weight W i , i = 1, 2, 3, 4, W = {W a , W b , W c , W d}, W1={W 11 , W 12 , W 13 , W 14}, W2={W 21 , W 22 , W 23 , W 24}, W3={W 31 , W 32 , W 33 , W 34}, W4={W 41 , W 42 , W 43 Among them, W1 represents the influence of human factors on the safety of the liquid hydrogen loading skid filling system, W2 represents the influence of equipment factors on the safety of the liquid hydrogen loading skid filling system, W3 represents the influence of safety management on the safety of the liquid hydrogen loading skid filling system, and W4 represents the influence of environmental factors on the safety of the liquid hydrogen loading skid filling system.

[0106] Step S206, establishing a comment set V for the liquid hydrogen loading skid filling system.

[0107] Generally, the evaluation results are divided into several intervals, namely safe, general, and dangerous, and the comment set is: V = {V1, V2, V3}. Here, the interval value of the comment for the quantitative indicators will be determined according to the specific situation. For example, in what range of pressure is safe and what range is more dangerous, the comment set is established by quantifying specific data; for qualitative indicators, a risk assessment matrix is ​​constructed according to the severity level and frequency of occurrence of each factor to obtain a comment set.

[0108] Step S208: Based on the monitored indicator data, the relevant indicators form an evaluation matrix R according to the comment set. i (i=1, 2, 3, 4).

[0109] Based on the comment set, the quantitative indicators are determined by thresholds to give an evaluation matrix. The qualitative indicators are determined according to the risk assessment matrix, and each factor is considered comprehensively from the severity level and frequency of the consequences of the factor. Taking Table 4 as an example, the evaluation matrix R iIn the figure, R1 is the evaluation matrix corresponding to human factors, R2 is the evaluation matrix corresponding to equipment factors, R3 is the evaluation matrix corresponding to safety management, and R4 is the evaluation matrix corresponding to environmental factors. R1, R2, and R3 are all four-row and three-column matrices, and R4 is a three-row and three-column matrix. Each row corresponds to a solution-level indicator, and each column corresponds to an evaluation result in the comment set.

[0110] Step S210, perform single factor evaluation to form a single factor evaluation matrix C i (i=1, 2, 3, 4).

[0111] C i It can be a matrix with one row and three columns. Taking Table 4 as an example, C i In (i=1, 2, 3, 4), C1=W1*R1, C2=W2*R2, C3=W3*R3, C4=W4*R4.

[0112] Step S212, taking all factors into consideration, conduct a comprehensive evaluation of the liquid hydrogen loading skid filling system to form a comprehensive evaluation matrix C.

[0113] C=W*R,where C is the result of comprehensive evaluation of all elements, and C can be a matrix with one row and three columns.

[0114] Step S214, according to the comprehensive evaluation matrix C, the safety level of the liquid hydrogen loading skid filling system is determined using the maximum membership principle.

[0115] According to the maximum membership principle, after determining the safety level of the liquid hydrogen loading skid filling system, take corresponding protection measures.

[0116] The safety assessment method for the liquid hydrogen loading skid filling system provided in the embodiment of the present invention has the following two characteristics:

[0117] 1) The traditional expert scoring method is a static evaluation process, and the establishment of the evaluation set is also subjective to a large extent. The embodiment of the present invention can make the evaluation result more objective. The embodiment of the present invention can realize real-time dynamic monitoring of the liquid hydrogen loading skid filling system, and take immediate measures to ensure safety in case of danger.

[0118] 2) In order to ensure the safety of the liquid hydrogen loading skid filling system, from the perspective of safety engineering, a real-time safety monitoring and evaluation system is established, which is of great significance to ensure the safety of the system to a certain extent.

[0119] Therefore, the safety assessment method for the liquid hydrogen loading skid filling system provided by the embodiment of the present invention has the following advantages:

[0120] 1) Develop a real-time safety evaluation method for the liquid hydrogen loading skid filling system, which can overcome the shortcomings of multiple manual evaluations, realize real-time safety evaluation, and ensure the safe operation of the liquid hydrogen loading skid filling system at all times.

[0121] 2) The judgment matrix is ​​more objective and effective than the previous expert scoring method. It also avoids labor costs to a large extent and is more effective for the evaluation results.

[0122] Corresponding to the above-mentioned safety evaluation method for the liquid hydrogen loading skid filling system, the embodiment of the present invention also provides a safety evaluation system for the liquid hydrogen loading skid filling system, see Figure 3 The schematic diagram of the structure of a safety evaluation system for a liquid hydrogen loading skid filling system is shown, and the safety evaluation system includes:

[0123] The acquisition module 301 is used to acquire the index data of the liquid hydrogen loading skid filling system in real time; wherein the index data is the monitoring data corresponding to the indicators of each scheme layer in the pre-established safety evaluation index system;

[0124] A determination module 302 is used to determine the evaluation matrix corresponding to each criterion-level indicator in the safety evaluation indicator system based on the indicator data and a pre-established comment set; wherein the comment set includes data requirements for solution-level indicators corresponding to different risk levels, and each criterion-level indicator corresponds to multiple solution-level indicators;

[0125] The evaluation module 303 is used to perform a comprehensive safety evaluation on the liquid hydrogen loading skid filling system based on the evaluation matrix corresponding to each criterion layer indicator and the pre-established indicator weight set to obtain a comprehensive evaluation result.

[0126] The safety evaluation system for the liquid hydrogen loading skid filling system provided in the embodiment of the present invention first obtains the index data of the liquid hydrogen loading skid filling system in real time when conducting the safety evaluation on the liquid hydrogen loading skid filling system; wherein the index data is the monitoring data corresponding to each scheme layer index in the pre-established safety evaluation index system; based on the index data and the pre-established comment set, the evaluation matrix corresponding to each criterion layer index in the safety evaluation index system is determined; wherein the comment set includes the data requirements of the scheme layer index corresponding to different risk levels, and each criterion layer index corresponds to multiple scheme layer indexes; based on the evaluation matrix corresponding to each criterion layer index and the pre-established indicator weight set, the liquid hydrogen loading skid filling system is comprehensively evaluated for safety, and a comprehensive evaluation result is obtained. In this way, real-time dynamic monitoring of the liquid hydrogen loading skid filling system is realized, and compared with the expert scoring method, this safety evaluation method based on the evaluation matrix has more objective and effective evaluation results, thereby ensuring the safety of the entire filling process.

[0127] Furthermore, the determination module 302 is specifically configured to:

[0128] When the program-level indicators are quantitative indicators, the evaluation matrix of the program-level indicators is determined by comparing the monitoring data of the program-level indicators with the corresponding thresholds in the comment set;

[0129] When the program-level indicator is a qualitative indicator, the evaluation matrix of the program-level indicator is determined based on the severity level and occurrence frequency corresponding to the monitoring data of the program-level indicator;

[0130] Based on the evaluation matrix of each scheme-level indicator corresponding to each criterion-level indicator, the evaluation matrix corresponding to each criterion-level indicator is determined.

[0131] Furthermore, the indicator weight set includes the first weight of each scheme-level indicator and the second weight of each criterion-level indicator; the evaluation module 303 is specifically used for:

[0132] Based on the evaluation matrix corresponding to each criterion-level indicator and the first weight of each scheme-level indicator corresponding to each criterion-level indicator, a single factor evaluation matrix corresponding to each criterion-level indicator is calculated;

[0133] Based on the single factor evaluation matrix corresponding to each criterion layer indicator and the second weight of each criterion layer indicator, a comprehensive evaluation matrix is ​​calculated;

[0134] Based on the comprehensive evaluation matrix, the comprehensive evaluation results of the liquid hydrogen loading skid filling system are determined.

[0135] Furthermore, the evaluation module 303 is also used for:

[0136] According to the maximum membership principle, determine the security level corresponding to the comprehensive evaluation matrix;

[0137] This safety level is determined as the comprehensive evaluation result of the liquid hydrogen loading skid filling system.

[0138] Furthermore, the safety assessment system of the liquid hydrogen loading skid filling system further includes an establishment module for:

[0139] Establish a safety evaluation index system for the liquid hydrogen loading skid filling system. The safety evaluation index system includes multiple criterion-level indicators and multiple program-level indicators corresponding to each criterion-level indicator.

[0140] Based on the safety evaluation index system, the analytic hierarchy process is used to establish the index weight set of the liquid hydrogen loading skid filling system.

[0141] Based on the indicators at each scheme level, a comment set for the liquid hydrogen loading skid filling system is established.

[0142] Furthermore, the criteria-level indicators in the above safety evaluation index system include human factors, equipment factors, safety management and environmental factors; the program-level indicators corresponding to human factors include human safety awareness, human operating level, human physiological factors and human psychological factors; the program-level indicators corresponding to equipment factors include valves and pipelines, pipeline flow meters, pressure indicators and temperature elements; the program-level indicators corresponding to safety management include safety education and training, safety emergency plans, safety warnings and signs, and safety systems and regulations; the program-level indicators corresponding to environmental factors include weather conditions, operation time and safe distance.

[0143] The safety evaluation system for the liquid hydrogen loading skid filling system provided in this embodiment has the same implementation principle and technical effects as those of the aforementioned embodiment of the safety evaluation method for the liquid hydrogen loading skid filling system. For the sake of brief description, for matters not mentioned in the embodiment of the safety evaluation system for the liquid hydrogen loading skid filling system, reference may be made to the corresponding contents in the aforementioned embodiment of the safety evaluation method for the liquid hydrogen loading skid filling system.

[0144] like Figure 4 As shown, an electronic device 400 provided by an embodiment of the present invention includes: a processor 401, a memory 402 and a bus, the memory 402 stores a computer program that can be run on the processor 401, when the electronic device 400 is running, the processor 401 and the memory 402 communicate through the bus, and the processor 401 executes the computer program to implement the above-mentioned safety evaluation method for the liquid hydrogen loading skid filling system.

[0145] Specifically, the memory 402 and the processor 401 can be general-purpose memories and processors, which are not specifically limited here.

[0146] The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, the safety evaluation method for the liquid hydrogen loading skid filling system described in the previous method embodiment is executed. The computer-readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a RAM, a magnetic disk or an optical disk, and other media that can store program codes.

[0147] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0148] The flow charts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the system, method and computer program product according to multiple embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A safety evaluation method for a liquid hydrogen loading skid filling system, characterized in that: include: Acquire the index data of the liquid hydrogen loading skid filling system in real time; wherein the index data is the monitoring data corresponding to the indicators of each scheme layer in the pre-established safety evaluation index system; Based on the indicator data and the pre-established comment set, determine the evaluation matrix corresponding to each criterion-level indicator in the safety evaluation indicator system; wherein the comment set includes data requirements for solution-level indicators corresponding to different risk levels, and each criterion-level indicator corresponds to a plurality of solution-level indicators; Based on the evaluation matrix corresponding to each of the criterion layer indicators and the pre-established indicator weight set, a comprehensive safety evaluation is performed on the liquid hydrogen loading skid filling system to obtain a comprehensive evaluation result.

2. The safety evaluation method for the liquid hydrogen loading skid filling system according to claim 1 is characterized in that: Determining the evaluation matrix corresponding to each criterion layer indicator in the safety evaluation indicator system based on the indicator data and the pre-established comment set includes: When the solution-level indicator is a quantitative indicator, the evaluation matrix of the solution-level indicator is determined by comparing the monitoring data of the solution-level indicator with the corresponding threshold value in the comment set; When the solution-level indicator is a qualitative indicator, an evaluation matrix of the solution-level indicator is determined based on the severity level and occurrence frequency corresponding to the monitoring data of the solution-level indicator; Based on the evaluation matrix of each of the scheme-level indicators corresponding to each of the criterion-level indicators, the evaluation matrix corresponding to each of the criterion-level indicators is determined.

3. The safety evaluation method for the liquid hydrogen loading skid filling system according to claim 1 is characterized in that: The indicator weight set includes the first weight of each of the scheme layer indicators and the second weight of each of the criterion layer indicators; based on the evaluation matrix corresponding to each of the criterion layer indicators and the pre-established indicator weight set, a comprehensive safety evaluation is performed on the liquid hydrogen loading skid filling system to obtain a comprehensive evaluation result, including: Based on the evaluation matrix corresponding to each of the criterion-layer indicators and the first weight of each of the scheme-layer indicators corresponding to each of the criterion-layer indicators, a single factor evaluation matrix corresponding to each of the criterion-layer indicators is calculated; Based on the single factor evaluation matrix corresponding to each of the criterion layer indicators and the second weight of each of the criterion layer indicators, a comprehensive evaluation matrix is ​​calculated; Based on the comprehensive evaluation matrix, a comprehensive evaluation result of the liquid hydrogen loading skid filling system is determined.

4. The safety evaluation method for the liquid hydrogen loading skid filling system according to claim 3 is characterized in that: Determining the comprehensive evaluation result of the liquid hydrogen loading skid filling system based on the comprehensive evaluation matrix includes: According to the maximum membership principle, determining the security level corresponding to the comprehensive evaluation matrix; The safety level is determined as a comprehensive evaluation result of the liquid hydrogen loading skid filling system.

5. The safety evaluation method for the liquid hydrogen loading skid filling system according to claim 1 is characterized in that: Before the real-time acquisition of the index data of the liquid hydrogen loading skid filling system, the safety evaluation method of the liquid hydrogen loading skid filling system further includes: Establishing a safety evaluation index system for the liquid hydrogen loading skid filling system, wherein the safety evaluation index system includes a plurality of criterion layer indicators and a plurality of scheme layer indicators corresponding to each of the criterion layer indicators; Based on the safety evaluation index system, an index weight set of the liquid hydrogen loading skid filling system is established by using the analytic hierarchy process; Based on each of the scheme-level indicators, a comment set for the liquid hydrogen loading skid filling system is established.

6. The safety evaluation method for a liquid hydrogen loading skid filling system according to any one of claims 1 to 5, characterized in that: The criteria-level indicators in the safety evaluation index system include human factors, equipment factors, safety management and environmental factors; the program-level indicators corresponding to the human factors include human safety awareness, human operating level, human physiological factors and human psychological factors; the program-level indicators corresponding to the equipment factors include valves and pipelines, pipeline flow meters, pressure indicators and temperature elements; the program-level indicators corresponding to the safety management include safety education and training, safety emergency plans, safety warnings and signs, and safety systems and regulations; the program-level indicators corresponding to the environmental factors include weather conditions, operation time and safe distance.

7. A safety evaluation system for a liquid hydrogen loading skid filling system, characterized in that: include: An acquisition module is used to acquire the index data of the liquid hydrogen loading skid filling system in real time; wherein the index data is the monitoring data corresponding to the indicators of each scheme layer in the pre-established safety evaluation index system; A determination module, for determining an evaluation matrix corresponding to each criterion-level indicator in the safety evaluation indicator system based on the indicator data and a pre-established comment set; wherein the comment set includes data requirements for solution-level indicators corresponding to different risk levels, and each criterion-level indicator corresponds to a plurality of solution-level indicators; The evaluation module is used to perform a comprehensive safety evaluation on the liquid hydrogen loading skid filling system based on the evaluation matrix corresponding to each criterion layer indicator and a pre-established indicator weight set to obtain a comprehensive evaluation result.

8. The safety evaluation system for the liquid hydrogen loading skid filling system according to claim 7 is characterized in that: The determination module is specifically used for: When the solution-level indicator is a quantitative indicator, the evaluation matrix of the solution-level indicator is determined by comparing the monitoring data of the solution-level indicator with the corresponding threshold value in the comment set; When the solution-level indicator is a qualitative indicator, an evaluation matrix of the solution-level indicator is determined based on the severity level and occurrence frequency corresponding to the monitoring data of the solution-level indicator; Based on the evaluation matrix of each of the scheme-level indicators corresponding to each of the criterion-level indicators, the evaluation matrix corresponding to each of the criterion-level indicators is determined.

9. The safety evaluation system for the liquid hydrogen loading skid filling system according to claim 7 is characterized in that: The indicator weight set includes the first weight of each of the scheme-level indicators and the second weight of each of the criterion-level indicators; the evaluation module is specifically used for: Based on the evaluation matrix corresponding to each of the criterion-layer indicators and the first weight of each of the scheme-layer indicators corresponding to each of the criterion-layer indicators, a single factor evaluation matrix corresponding to each of the criterion-layer indicators is calculated; Based on the single factor evaluation matrix corresponding to each of the criterion layer indicators and the second weight of each of the criterion layer indicators, a comprehensive evaluation matrix is ​​calculated; Based on the comprehensive evaluation matrix, a comprehensive evaluation result of the liquid hydrogen loading skid filling system is determined.

10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, wherein: When the processor executes the computer program, the safety evaluation method for the liquid hydrogen loading skid filling system according to any one of claims 1 to 6 is implemented.

Images