Gas-electric coupling system safety evaluation method and device, electronic equipment and storage medium

Abstract

This invention discloses a method, apparatus, electronic device, and storage medium for safety assessment of a gas-electric coupling system. It includes: setting power behavior indicators based on node voltage behavior indicators, branch power flow behavior indicators, and power loss-of-load behavior indicators in the gas-electric coupling system; setting gas transmission behavior indicators based on node gas pressure behavior indicators, pipeline flow behavior indicators, and gas transmission loss-of-load behavior indicators in the gas-electric coupling system; determining a comprehensive behavior indicator for the gas-electric coupling system based on the power behavior indicators and the gas transmission behavior indicators; and conducting a safety assessment of the gas-electric coupling system based on the comprehensive behavior indicator. This invention can more reasonably quantify the impact of anticipated faults on system safety, more accurately represent the severity and occurrence time of different faults, thereby improving the safety of system operation.

Description

Technical Field

[0001] This invention relates to the field of integrated energy system operation and control technology, and in particular to a method, apparatus, electronic device and storage medium for safety assessment of a gas-electric coupling system. Background Technology

[0002] Safety assessment is one of the core functions of an energy management system. Its main functions include determining the system's operational status, analyzing potential hazards and their severity, providing early warning information, identifying weaknesses, and guiding safety controls. With the widespread application of gas-fired power plants, the interaction between natural gas systems and power systems is increasingly strengthened, leading to a continuous increase in the probability of cascading failures. However, the concepts of safety analysis for natural gas systems and safety assessment for power systems differ significantly, thus highlighting the limitations of traditional safety assessment methods for single energy systems. In existing steady-state safety assessments, the calculation of behavioral indicators does not consider factors that change over time, and the results may not accurately reflect the severity of the failure. Summary of the Invention

[0003] In order to at least partially solve the technical problems existing in the prior art, the inventors made this invention, which, through specific embodiments, provides a method, apparatus, electronic device and storage medium for safety assessment of a pneumatic-electric coupling system.

[0004] In a first aspect, embodiments of the present invention provide a safety assessment method for a pneumatic-electric coupling system, comprising the following steps:

[0005] Based on the node voltage behavior index, branch power flow behavior index, and power offload behavior index in the gas-electric coupling system, power behavior index is set;

[0006] Based on the node pressure behavior index, pipeline flow behavior index, and gas transmission load failure behavior index in the gas-electric coupling system, gas transmission behavior index is set.

[0007] Based on the power behavior indicators and gas transmission behavior indicators, a comprehensive behavior indicator for the gas-electric coupling system is determined, and a safety assessment of the gas-electric coupling system is conducted based on the comprehensive behavior indicator for the gas-electric coupling system.

[0008] Optionally, before setting the power behavior indicators, the following steps are included:

[0009] Based on the upper and lower limit constraints of node voltage in the gas-electric coupling system, node voltage behavior indicators are set.

[0010] Based on the upper limit constraint of branch power flow in the gas-electric coupling system, branch power flow behavior indicators are set;

[0011] Based on the power system load loss ratio in the aforementioned gas-electric coupling system, power load loss behavior indicators are set.

[0012] Optionally, setting node voltage behavior indicators based on the upper and lower limit constraints of node voltage in the gas-electric coupling system includes the following steps:

[0013] The node voltage behavior index is set according to the following formula.

[0014]

[0015] Among them, PI V This represents a node voltage behavior index, where i is the node number and w Vi V represents the weight of the node voltage behavior index of node i. i Let be the current voltage at node i. For the upper limit voltage constraint of node i, V i Here, n represents the lower voltage limit constraint for node i, and n is the expansion exponent.

[0016] Optionally, setting branch power flow behavior indicators based on the branch power flow upper limit constraint in the gas-electric coupling system includes the following steps:

[0017] The branch flow behavior index is set according to the following formula.

[0018]

[0019] Among them, PI S This represents the branch flow behavior index, where l is the branch number and w is the branch flow behavior index. Pl S represents the weight of the branch power flow behavior index of branch l. l For the current trend of branch l, Here, n is the upper limit constraint for the power flow of branch l, and n is the expansion exponent.

[0020] Optionally, setting the power offload behavior index based on the power system offload ratio in the gas-electric coupling system includes the following steps:

[0021] The power offload behavior index is set according to the following formula.

[0022]

[0023] Among them, PI e This represents an indicator of power load failure behavior, where D is the power load number. P represents the expected electricity load. D ε represents the actual available load for electricity supply. ce w is the amplification factor for the power load failure behavior index. eD denoted as the weight of the power load failure behavior index for power load D, and n is the expansion index.

[0024] Optionally, before setting the gas transmission behavior indicators, the following steps are included:

[0025] Based on the upper and lower limits of node air pressure in the gas-electric coupling system, set node air pressure behavior indicators;

[0026] Based on the upper limit constraint of pipeline flow in the gas-electric coupling system, set pipeline flow behavior indicators;

[0027] Based on the unload ratio of the gas transmission system in the gas-electric coupling system, a gas transmission unload behavior index is set.

[0028] Optionally, setting the node pressure behavior index based on the upper and lower limit constraints of node pressure in the gas-electric coupling system includes the following steps:

[0029] The nodal pressure behavior index is set according to the following formula.

[0030]

[0031] Among them, PI p This represents the nodal pressure behavior index, where i is the node number and w is the node number. pi p represents the weight of the nodal pressure behavior index of node i. i Let i be the current air pressure at node i. The upper limit constraint for air pressure at node i. p i Let n be the lower limit constraint of air pressure at node i, and n be the expansion exponent.

[0032] Optionally, setting the pipeline flow behavior index based on the upper limit constraint of pipeline flow in the gas-electric coupling system includes the following steps:

[0033] Set the pipeline flow behavior indicators according to the following formula.

[0034]

[0035] Among them, PI m This represents a pipeline flow behavior indicator, where b is the pipeline number and w is the pipeline number. mb m represents the weight of the pipeline flow behavior index for pipeline b. b Let be the current flow rate of pipe b. Here, n represents the upper limit constraint on the power flow of pipeline b, and n is the expansion exponent.

[0036] Optionally, setting the gas transmission load failure behavior index based on the gas transmission system load failure ratio in the gas-electric coupling system includes the following steps:

[0037] The following formula is used to set the gas transmission load loss behavior index.

[0038]

[0039] Among them, PI g This is an indicator of gas transmission load loss behavior, where G is the natural gas load number. For the expected load of natural gas load G, m G ε represents the actual supplyable load of natural gas load G. cg w is the expansion factor for the gas transmission load shedding behavior index. gG denoted as the weight of the gas transmission load loss behavior index for natural gas load G, and n is the expansion index.

[0040] Optionally, setting the power behavior indicators based on the node voltage behavior indicators, branch power flow behavior indicators, and power offload behavior indicators in the gas-electric coupling system includes the following steps:

[0041] Set the power behavior indicators according to the following formula.

[0042] EPI = w V PI V +w P PI S +w e PI e

[0043] Among them, EPI is an electricity behavior indicator, w V PI is the weight of the node voltage behavior index. V w represents a node voltage behavior index. P PI is the weight of the branch flow behavior indicator. S w represents the branch flow behavior index. e PI is the weight of the power load shedding behavior index. e Indicators representing power outage behavior.

[0044] Optionally, setting the gas transmission behavior indicators based on the node gas pressure behavior indicators, pipeline flow behavior indicators, and gas transmission load shedding behavior indicators in the gas-electric coupling system includes the following steps:

[0045] Set the gas transmission behavior indicators according to the following formula.

[0046] GPI = w p PI p +w m PI m +w g PI g

[0047] Among them, GPI is a gas transmission behavior indicator, w p PI represents the weight of nodal pressure behavior indicators. p w represents an indicator of nodal pressure behavior. m PI is the weight of pipeline flow behavior indicators. mw represents a pipeline flow behavior indicator. g PI is the weighting of the gas transmission load shedding behavior index. g This is an indicator of gas transmission load loss behavior.

[0048] Optionally, determining the comprehensive behavior index of the gas-electric coupling system based on the power behavior index and the gas transmission behavior index includes the following steps:

[0049] The comprehensive behavioral index of the gas-electric coupling system is determined according to the following formula.

[0050] IPI=w ele ·EPI+w gas GPI

[0051] Wherein, IPI represents the comprehensive behavioral index of the gas-electric coupling system, w ele Represents the power system weights, EPI is the power behavior index, and w gas This indicates the weight of the gas transmission system, and GPI is a gas transmission behavior indicator.

[0052] Secondly, embodiments of the present invention provide a safety assessment device for a pneumatic-electric coupling system, comprising:

[0053] The power behavior index setting module is used to set power behavior indexes based on the node voltage behavior index, branch power flow behavior index, and power offload behavior index in the gas-electric coupling system.

[0054] The gas transmission behavior index setting module is used to set gas transmission behavior indexes based on the node gas pressure behavior index, pipeline flow behavior index, and gas transmission load failure behavior index in the gas-electric coupling system.

[0055] The comprehensive behavior index assessment module is used to determine the comprehensive behavior index of the gas-electric coupling system based on the power behavior index and the gas transmission behavior index, and to conduct a safety assessment of the gas-electric coupling system based on the comprehensive behavior index of the gas-electric coupling system.

[0056] Optional, also includes:

[0057] The node voltage behavior index setting module is used to set node voltage behavior indexes according to the upper and lower limit constraints of node voltage in the gas-electric coupling system.

[0058] The branch power flow behavior index setting module is used to set the branch power flow behavior index according to the upper limit constraint of the branch power flow in the gas-electric coupling system.

[0059] The power failure behavior index setting module is used to set power failure behavior indicators based on the power system failure ratio in the gas-electric coupling system.

[0060] The node air pressure behavior index setting module is used to set node air pressure behavior indexes according to the upper and lower limit constraints of node air pressure in the gas-electric coupling system.

[0061] The pipeline flow behavior indicator setting module is used to set pipeline flow behavior indicators based on the upper limit constraint of pipeline flow in the gas-electric coupling system.

[0062] The gas transmission load loss behavior setting module is used to set the gas transmission load loss behavior index according to the gas transmission system load loss ratio in the gas-electric coupling system.

[0063] Optionally, the node voltage behavior index setting module is specifically used for:

[0064] The node voltage behavior index is set according to the following formula.

[0065]

[0066] Among them, PI V This represents a node voltage behavior index, where i is the node number and w Vi V represents the weight of the node voltage behavior index of node i. i Let be the current voltage at node i. For the upper limit voltage constraint of node i, V i Here, n represents the lower voltage limit constraint for node i, and n is the expansion exponent.

[0067] Optionally, the branch flow behavior index setting module is specifically used for:

[0068] The branch flow behavior index is set according to the following formula.

[0069]

[0070] Among them, PI S This represents the branch flow behavior index, where l is the branch number and w is the branch flow behavior index. Pl S represents the weight of the branch power flow behavior index of branch l. l For the current trend of branch l, Here, n is the upper limit constraint for the power flow of branch l, and n is the expansion exponent.

[0071] Optionally, the power offload behavior indicator setting module is specifically used for:

[0072] The power offload behavior index is set according to the following formula.

[0073]

[0074] Among them, PI e This represents an indicator of power load failure behavior, where D is the power load number. P represents the expected electricity load. D ε represents the actual available load for electricity supply. ce w is the amplification factor for the power load failure behavior index. eD denoted as the weight of the power load failure behavior index for power load D, and n is the expansion index.

[0075] Optionally, the node pressure behavior index setting module is specifically used for:

[0076] The nodal pressure behavior index is set according to the following formula.

[0077]

[0078] Among them, PI p This represents the nodal pressure behavior index, where i is the node number and w is the node number. pi p represents the weight of the nodal pressure behavior index of node i. i Let i be the current air pressure at node i. The upper limit constraint for air pressure at node i. p i Let n be the lower limit constraint of air pressure at node i, and n be the expansion exponent.

[0079] Optionally, the pipeline flow behavior indicator setting module is specifically used for:

[0080] Set the pipeline flow behavior indicators according to the following formula.

[0081]

[0082] Among them, PI m This represents a pipeline flow behavior indicator, where b is the pipeline number and w is the pipeline number. mb m represents the weight of the pipeline flow behavior index for pipeline b. b Let be the current flow rate of pipe b. Here, n represents the upper limit constraint on the power flow of pipeline b, and n is the expansion exponent.

[0083] Optionally, the gas transmission load loss behavior index setting module is specifically used for:

[0084] The following formula is used to set the gas transmission load loss behavior index.

[0085]

[0086] Among them, PI g This is an indicator of gas transmission load loss behavior, where G is the natural gas load number. For the expected load of natural gas load G, m G ε represents the actual supplyable load of natural gas load G. cg w is the expansion factor for the gas transmission load shedding behavior index. gGdenoted as the weight of the gas transmission load loss behavior index for natural gas load G, and n is the expansion index.

[0087] Optionally, the power behavior indicator setting module is specifically used for:

[0088] Set the power behavior indicators according to the following formula.

[0089] EPI = w V PI V +w P PI S +w e PI e

[0090] Among them, EPI is an electricity behavior indicator, w V PI is the weight of the node voltage behavior index. V w represents a node voltage behavior index. P PI is the weight of the branch flow behavior indicator. S w represents the branch flow behavior index. e PI is the weight of the power load shedding behavior index. e Indicators representing power outage behavior.

[0091] Optionally, the gas transmission behavior index setting module is specifically used for:

[0092] Set the gas transmission behavior indicators according to the following formula.

[0093] GPI = w p PI p +w m PI m +w g PI g

[0094] Among them, GPI is a gas transmission behavior indicator, w p PI represents the weight of nodal pressure behavior indicators. p w represents an indicator of nodal pressure behavior. m PI is the weight of pipeline flow behavior indicators. m w represents a pipeline flow behavior indicator. g PI is the weighting of the gas transmission load shedding behavior index. g This is an indicator of gas transmission load loss behavior.

[0095] Optionally, the comprehensive behavioral indicator evaluation module is specifically used for:

[0096] The comprehensive behavioral index of the gas-electric coupling system is determined according to the following formula.

[0097] IPI=w ele ·EPI+w gas GPI

[0098] Wherein, IPI represents the comprehensive behavioral index of the gas-electric coupling system, w ele Represents the power system weights, EPI is the power behavior index, and w gas GPI represents the weight of the gas transmission system and is a gas transmission behavior indicator.

[0099] A safety assessment of the gas-electric coupling system is conducted based on the comprehensive behavioral indicators of the gas-electric coupling system.

[0100] Based on the same inventive concept, embodiments of the present invention also provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the aforementioned safety assessment method for a gas-electric coupling system.

[0101] Based on the same inventive concept, embodiments of the present invention also provide a computer storage medium storing computer-executable instructions, which, when executed, implement the aforementioned safety assessment method for a gas-electric coupling system.

[0102] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0103] This invention proposes a quasi-dynamic safety assessment method applicable to gas-electric coupled systems. This method fully considers that the transient process time constant of a natural gas system is much larger than that of an electric system. In modeling the coupled system, a steady-state model is used for the electric system, while a dynamic model is used for the gas transmission system. By fully considering time-varying factors, behavioral indicators are calculated, which can describe the characteristics of the fault evolution process, more reasonably quantify the impact of anticipated faults on system safety, and more accurately represent the severity and occurrence time of different faults, further improving the safety of system operation.

[0104] Other features and advantages of the invention will be set forth in the following description. The objects and other advantages of the invention can be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0105] 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

[0106] 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:

[0107] Figure 1 This is a flowchart of a safety assessment method for a pneumatic-electric coupling system according to an embodiment of the present invention;

[0108] Figure 2 This is a diagram of the natural gas pipeline network structure in an embodiment of the present invention;

[0109] Figure 3 This is a power grid structure diagram in an embodiment of the present invention;

[0110] Figure 4 This is a schematic diagram of the load flow of a non-gas turbine unit in a natural gas system according to an embodiment of the present invention;

[0111] Figure 5 This is a schematic diagram of the power system load in an embodiment of the present invention;

[0112] Figure 6 This is a schematic diagram of the generator set output in an embodiment of the present invention;

[0113] Figure 7 This is a schematic diagram of the safe pressure range of a natural gas system node in an embodiment of the present invention;

[0114] Figure 8 This is a load fluctuation curve diagram in an embodiment of the present invention;

[0115] Figure 9 This is a schematic diagram of quasi-dynamic comprehensive behavioral indicators in an embodiment of the present invention;

[0116] Figure 10 This is a block diagram of a safety assessment device for a pneumatic-electric coupling system according to an embodiment of the present invention;

[0117] Figure 11 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0118] 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.

[0119] To address the problems existing in the prior art, embodiments of the present invention provide a method, apparatus, electronic device, and storage medium for safety assessment of a pneumatic-electric coupling system.

[0120] Embodiment 1 of the present invention provides a safety assessment method for a pneumatic-electric coupling system, the process of which is as follows: Figure 1 As shown, it includes the following steps:

[0121] Step S101: Based on the upper and lower limit constraints of node voltage in the gas-electric coupling system, set node voltage behavior indicators; based on the upper limit constraints of branch power flow in the gas-electric coupling system, set branch power flow behavior indicators; based on the power system load shedding ratio in the gas-electric coupling system, set power load shedding behavior indicators; based on the upper and lower limit constraints of node gas pressure in the gas-electric coupling system, set node gas pressure behavior indicators; based on the upper limit constraints of pipeline flow in the gas-electric coupling system, set pipeline flow behavior indicators; based on the gas transmission system load shedding ratio in the gas-electric coupling system, set gas transmission load shedding behavior indicators.

[0122] Optionally, setting node voltage behavior indicators based on the upper and lower limit constraints of node voltage in the gas-electric coupling system includes the following steps:

[0123] The node voltage behavior index is set according to the following formula.

[0124]

[0125] Among them, PI V This represents a node voltage behavior index, where i is the node number and w Vi V represents the weight of the node voltage behavior index of node i. i Let be the current voltage at node i. For the upper limit voltage constraint of node i, V i Here, n represents the lower voltage limit constraint for node i, and n is the expansion exponent.

[0126] w Vi Based on experience, the higher the importance of the node variable's safety, the greater its weight. n is the expansion exponent, typically a number between 2 and 5, which can expand the indicators of out-of-limit items and highlight the impact of a single severe failure.

[0127] Node voltages have upper and lower limit constraints. When a variable is within the upper and lower limit constraints, the farther it is from the upper and lower limits, the smaller the behavioral index and the better the safety. Conversely, when a variable is outside the upper and lower limit constraints, the farther it is from the upper and lower limits, the larger the behavioral index and the worse the safety.

[0128] Optionally, setting branch power flow behavior indicators based on the branch power flow upper limit constraint in the gas-electric coupling system includes the following steps:

[0129] The branch flow behavior index is set according to the following formula.

[0130]

[0131] Among them, PI S This represents the branch flow behavior index, where l is the branch number and w is the branch flow behavior index. PlS represents the weight of the branch power flow behavior index of branch l. l For the current trend of branch l, Here, n is the upper limit constraint for the power flow of branch l, and n is the expansion exponent.

[0132] Branch flow generally only has upper limit constraints; the defined behavioral indicators should characterize the overload degree of line flow or pipeline flow. Pl Experience shows that the higher the importance of the branch variable in terms of safety, the greater its weight.

[0133] Optionally, setting the power offload behavior index based on the power system offload ratio in the gas-electric coupling system includes the following steps:

[0134] The power offload behavior index is set according to the following formula.

[0135]

[0136] Among them, PI e This represents an indicator of power load failure behavior, where D is the power load number. P represents the expected electricity load. D ε represents the actual available load for electricity supply. ce w is the amplification factor for the power load failure behavior index. eD denoted as the weight of the power load failure behavior index for power load D, and n is the expansion index.

[0137] Loss of load is generally considered the most severe consequence of a fault, and its behavior can be described by a power function of the loss of load ratio. When prioritizing anticipated faults, the faults that cause loss of load should be prioritized. eD Experience suggests that the more important a load is, the greater its weight.

[0138] Optionally, setting the node pressure behavior index based on the upper and lower limit constraints of node pressure in the gas-electric coupling system includes the following steps:

[0139] The nodal pressure behavior index is set according to the following formula.

[0140]

[0141] Among them, PI p This represents the nodal pressure behavior index, where i is the node number and w is the node number. pi p represents the weight of the nodal pressure behavior index of node i. i Let i be the current air pressure at node i. The upper limit constraint for air pressure at node i. p i represents the lower limit constraint of air pressure at node i, and n represents the expansion exponent.

[0142] Nodal pressure has upper and lower limit constraints. When a variable is within these constraints, the greater the distance from the upper and lower limits, the smaller the behavioral indicator and the better the safety. Conversely, when a variable is outside these constraints, the greater the distance from the upper and lower limits, the larger the behavioral indicator and the worse the safety. pi Based on experience, the higher the importance of the node variable's safety, the greater its weight. n is the expansion exponent, typically a number between 2 and 5, which can expand the indicators of out-of-limit items and highlight the impact of a single severe failure.

[0143] Optionally, setting the pipeline flow behavior index based on the upper limit constraint of pipeline flow in the gas-electric coupling system includes the following steps:

[0144] Set the pipeline flow behavior indicators according to the following formula.

[0145]

[0146] Among them, PI m This represents a pipeline flow behavior indicator, where b is the pipeline number and w is the pipeline number. mb m represents the weight of the pipeline flow behavior index for pipeline b. b Let be the current flow rate of pipe b. Here, n represents the upper limit constraint on the power flow of pipeline b, and n is the expansion exponent.

[0147] Pipeline flow generally only has an upper limit constraint; therefore, defining behavioral indicators should characterize the degree of overload in the line power flow or pipeline flow. mb Experience shows that the higher the importance of the branch variable in terms of safety, the greater its weight.

[0148] Optionally, setting the gas transmission load failure behavior index based on the gas transmission system load failure ratio in the gas-electric coupling system includes the following steps:

[0149] The following formula is used to set the gas transmission load loss behavior index.

[0150]

[0151] Among them, PI g This is an indicator of gas transmission load loss behavior, where G is the natural gas load number. For the expected load of natural gas load G, m G ε represents the actual supplyable load of natural gas load G. cg w is the expansion factor for the gas transmission load shedding behavior index. gG denoted as the weight of the gas transmission load loss behavior index for natural gas load G, and n is the expansion index.

[0152] w gG Experience suggests that the more important a load is, the greater its weight.

[0153] Furthermore, due to the slow-dynamic nature of natural gas systems, the impact of faults changes over time, and load loss does not occur immediately. Therefore, considering the influence of time, the load loss behavior index is defined as a time decay function to characterize that the later the load loss occurs, the smaller the impact of the fault on the current system safety.

[0154] PI x,t =PI x ·e -λt

[0155] Where t is time, λ is the decay exponent, which characterizes the rate at which the impact of the fault decays over time. The larger λ is, the faster the impact of the fault on system safety decreases over time. x represents any of the power loads or natural gas loads mentioned above.

[0156] Step S102: Set the power behavior indicators based on the node voltage behavior indicators, branch power flow behavior indicators, and power load failure behavior indicators in the gas-electric coupling system; set the gas transmission behavior indicators based on the node gas pressure behavior indicators, pipeline flow behavior indicators, and gas transmission load failure behavior indicators in the gas-electric coupling system.

[0157] The behavioral indicators of each system are obtained by combining the behavioral indicators of the above components. When combining them, the importance of different security issues should be considered. The higher the importance, the greater the weight.

[0158] Optionally, setting the power behavior indicators based on the node voltage behavior indicators, branch power flow behavior indicators, and power offload behavior indicators in the gas-electric coupling system includes the following steps:

[0159] The electric performance index (EPI) is set according to the following formula:

[0160] EPI = w V PI V +w P PI S +w e PI e

[0161] Among them, EPI is an electricity behavior indicator, w V PI is the weight of the node voltage behavior index. V w represents a node voltage behavior index. P PI is the weight of the branch flow behavior indicator. S w represents the branch flow behavior index. e PI is the weight of the power load shedding behavior index. e Indicators representing power outage behavior.

[0162] Optionally, setting the gas transmission behavior indicators based on the node gas pressure behavior indicators, pipeline flow behavior indicators, and gas transmission load shedding behavior indicators in the gas-electric coupling system includes the following steps:

[0163] The gas performance index (GPI) is set according to the following formula:

[0164] GPI = w p PI p +w m PI m +w g PI g

[0165] Among them, GPI is a gas transmission behavior indicator, w p PI represents the weight of nodal pressure behavior indicators. p w represents an indicator of nodal pressure behavior. m PI is the weight of pipeline flow behavior indicators. m w represents a pipeline flow behavior indicator. g PI is the weighting of the gas transmission load shedding behavior index. g This is an indicator of gas transmission load loss behavior.

[0166] Step S103: Determine the comprehensive behavior index of the gas-electric coupling system based on the power behavior index and the gas transmission behavior index, and conduct a safety assessment of the gas-electric coupling system based on the comprehensive behavior index of the gas-electric coupling system.

[0167] The comprehensive performance index (IPI) of a gas-electric coupling system can be obtained by weighting the EPI and GPI.

[0168] Optionally, determining the comprehensive behavior index of the gas-electric coupling system based on the power behavior index and the gas transmission behavior index includes the following steps:

[0169] The comprehensive behavioral index of the gas-electric coupling system is determined according to the following formula.

[0170] IPI=w ele ·EPI+w gas GPI

[0171] Wherein, IPI represents the comprehensive behavioral index of the gas-electric coupling system, w ele Represents the power system weights, EPI is the power behavior index, and w gas This indicates the weight of the gas transmission system, and GPI is a gas transmission behavior indicator.

[0172] Weighting coefficient w ele w gas It characterizes the importance of security for different systems and is derived from experience.

[0173] Taking a large-scale gas-electric coupling system as an example, the natural gas system is a simplified version of the actual natural gas pipeline network in a certain area, such as... Figure 2 As shown; the power system is a 300-node network formed by connecting ten IEEE 30-node models via tie lines, such as... Figure 3 As shown. Let the current natural gas system load flow rate be as follows: Figure 4 As shown, the horizontal axis represents the load number, and the vertical axis represents the mass flow rate, in kg / s. The power system load power and generator output are respectively shown in the figures. Figure 5 and Figure 6 As shown. Figure 5 In the diagram, the horizontal axis represents the busbar number, and the vertical axis represents the power system load power, in MW. Figure 6 In the diagram, the horizontal axis represents the unit number, and the vertical axis represents the power of the power system units, in MW. The main system safety constraints include: bus voltage range of 0.9–1.1 pu, line power flow range of 0–800 MW; pipeline branch flow velocity range of 0–15 m / s, and node pressure range as follows: Figure 7 As shown in the figure, the horizontal axis represents the node number, and the vertical axis represents the pressure, in bar.

[0174] The comprehensive set of anticipated faults is still defined according to the N-1 principle. The total number of anticipated faults after rapid filtering is 871, including 7 gas source faults, 137 natural gas pipeline faults, 39 non-zero non-gas unit load faults, 428 power line faults, 60 generator set faults, and 200 power load faults.

[0175] The weight of the load shedding index was set to 1, and the weight of all other limit-crossing indices was set to 0.1. Due to the higher safety requirements of the power system, the weight of the power system and the natural gas system in the comprehensive behavioral indicators was set to 10:1; simultaneously, the expansion coefficient ε for the load shedding index was set to 200, and the frequency of each index was set to n=2. After fault scanning, 95 anticipated faults requiring detailed analysis were identified, namely 4 gas source faults, 89 natural gas pipeline faults, and 2 generator set faults.

[0176] In this embodiment, the simulation time window is T = 12h. Assuming the fault occurs at time 0, to simulate load fluctuations during the daytime rush hour, all natural gas and electricity load changes (expressed in per-unit values) are as follows: Figure 8 As shown in the figure, the horizontal axis represents time in hours (h), and the vertical axis represents per-unit values.

[0177] The calculation results of the comprehensive behavioral index of the quasi-dynamic gas-electric coupling system are as follows: Figure 9As shown in the figure, the horizontal axis represents time (in hours), the vertical axis represents the fault number, and the right-hand scale represents the comprehensive behavioral index value of the gas-electric coupling system. The darker the color, the larger the comprehensive behavioral index of the gas-electric coupling system, and the greater the severity of the fault. A safety assessment of the gas-electric coupling system is conducted based on the comprehensive behavioral index: Overall, the severity of faults in the power system (faults 94-95) is lower than that in the natural gas system (faults 1-93). This is because, in this embodiment, the power system is interconnected, and the mutual support capacity between power sources is stronger after a fault. In contrast, the natural gas system has a more branched network, and multiple branch faults will lead to load unsustainability, resulting in a load loss accident. The severity of the load loss accident is greater, hence the larger behavioral index. The comprehensive behavioral index of the gas-electric coupling system more accurately represents the severity and occurrence time of different faults. Some faults have lower severity, such as fault 34 (pipeline 116). Although the fault will result in a load loss, because the load is small, its sustainable supply time is very long. During this time, fault repair may have already been completed, and the load does not need to take any measures. Some faults are of moderate severity, such as fault 66 (pipeline 91). Although the fault ultimately leads to a significant load loss, the controllable time is relatively long. Active control measures can be taken to mitigate the impact of the fault, such as adjusting the output of the gas turbine unit on the faulty pipeline branch or replacing the electro-gas coupled load with electricity. However, some faults are of very high severity, such as fault 11 (pipeline 15). These faulty pipelines often support large loads, and the impact after a fault is significant and rapid, making them weak links in the system operation. The planning should consider equipping them with energy storage or other supplementary energy devices, or considering expanding backup pipelines.

[0178] In the above method of this embodiment, the transient process time constant of the natural gas system is much larger than that of the power system. In the modeling of the coupled system, a steady-state model is used for the power system and a dynamic model is used for the gas transmission system. Under the premise of fully considering the time variation factor, the behavioral index is calculated, which can describe the characteristics of the fault evolution process, and can more reasonably quantify the impact of the expected fault on the system safety. It can also more accurately represent the severity and occurrence time of different faults, and further improve the safety of system operation.

[0179] Embodiment 2 of the present invention provides a safety assessment device for a pneumatic-electric coupling system, the structure of which is as follows: Figure 10 As shown, it includes:

[0180] The power behavior index setting module 201 is used to set power behavior indexes based on the node voltage behavior index, branch power flow behavior index and power offload behavior index in the gas-electric coupling system.

[0181] The gas transmission behavior index setting module 202 is used to set gas transmission behavior indexes based on the node gas pressure behavior index, pipeline flow behavior index and gas transmission load failure behavior index in the gas-electric coupling system.

[0182] The comprehensive behavior index assessment module 203 is used to determine the comprehensive behavior index of the gas-electric coupling system based on the power behavior index and the gas transmission behavior index, and to conduct a safety assessment of the gas-electric coupling system based on the comprehensive behavior index of the gas-electric coupling system.

[0183] Optional, also includes:

[0184] The node voltage behavior index setting module 101 is used to set node voltage behavior indexes according to the upper and lower limit constraints of node voltage in the gas-electric coupling system.

[0185] Branch flow behavior index setting module 102 is used to set branch flow behavior indexes according to the upper limit constraint of branch flow in the gas-electric coupling system.

[0186] The power load failure behavior indicator setting module 103 is used to set power load failure behavior indicators according to the power system load failure ratio in the gas-electric coupling system.

[0187] The node air pressure behavior index setting module 104 is used to set node air pressure behavior indexes according to the upper and lower limit constraints of node air pressure in the gas-electric coupling system.

[0188] The pipeline flow behavior index setting module 105 is used to set pipeline flow behavior indexes according to the upper limit constraint of pipeline flow in the gas-electric coupling system.

[0189] The gas transmission load loss behavior setting module 106 is used to set the gas transmission load loss behavior index according to the gas transmission system load loss ratio in the gas-electric coupling system.

[0190] Optionally, the node voltage behavior index setting module 101 is specifically used for:

[0191] The node voltage behavior index is set according to the following formula.

[0192]

[0193] Among them, PI V This represents a node voltage behavior index, where i is the node number and w Vi V represents the weight of the node voltage behavior index of node i. i Let be the current voltage at node i. For the upper limit voltage constraint of node i, V i Here, n represents the lower voltage limit constraint for node i, and n is the expansion exponent.

[0194] Optionally, the branch flow behavior index setting module 102 is specifically used for:

[0195] The branch flow behavior index is set according to the following formula.

[0196]

[0197] Among them, PI S This represents the branch flow behavior index, where l is the branch number and w is the branch flow behavior index. Pl S represents the weight of the branch power flow behavior index of branch l. l For the current trend of branch l, Here, n is the upper limit constraint for the power flow of branch l, and n is the expansion exponent.

[0198] Optionally, the power offload behavior indicator setting module 103 is specifically used for:

[0199] The power offload behavior index is set according to the following formula.

[0200]

[0201] Among them, PI e This represents an indicator of power load failure behavior, where D is the power load number. P represents the expected electricity load. D ε represents the actual available load for electricity supply. ce w is the amplification factor for the power load failure behavior index. eD denoted as the weight of the power load failure behavior index for power load D, and n is the expansion index.

[0202] Optionally, the node pressure behavior index setting module 104 is specifically used for:

[0203] The nodal pressure behavior index is set according to the following formula.

[0204]

[0205] Among them, PI p This represents the nodal pressure behavior index, where i is the node number and w is the node number. pi p represents the weight of the nodal pressure behavior index of node i. i Let i be the current air pressure at node i. The upper limit constraint for air pressure at node i. p i Let n be the lower limit constraint of air pressure at node i, and n be the expansion exponent.

[0206] Optionally, the pipeline flow behavior index setting module 105 is specifically used for:

[0207] Set the pipeline flow behavior indicators according to the following formula.

[0208]

[0209] Among them, PI m This represents a pipeline flow behavior indicator, where b is the pipeline number and w is the pipeline number. mb m represents the weight of the pipeline flow behavior index for pipeline b. b Let be the current flow rate of pipe b. Here, n represents the upper limit constraint on the power flow of pipeline b, and n is the expansion exponent.

[0210] Optionally, the gas transmission load loss behavior setting module 106 is specifically used for:

[0211] The following formula is used to set the gas transmission load loss behavior index.

[0212]

[0213] Among them, PI g This is an indicator of gas transmission load loss behavior, where G is the natural gas load number. For the expected load of natural gas load G, m G ε represents the actual supplyable load of natural gas load G. cg w is the expansion factor for the gas transmission load shedding behavior index. gG denoted as the weight of the gas transmission load loss behavior index for natural gas load G, and n is the expansion index.

[0214] Optionally, the power behavior indicator setting module 201 is specifically used for:

[0215] Set the power behavior indicators according to the following formula.

[0216] EPI = w V PI V +w P PI S +w e PI e

[0217] Among them, EPI is an electricity behavior indicator, w V PI is the weight of the node voltage behavior index. V w represents a node voltage behavior index. P PI is the weight of the branch flow behavior indicator. S w represents the branch flow behavior index. e PI is the weight of the power load shedding behavior index. e Indicators representing power outage behavior.

[0218] Optionally, the gas transmission behavior index setting module 202 is specifically used for:

[0219] Set the gas transmission behavior indicators according to the following formula.

[0220] GPI = w p PI p +w m PI m +w g PI g

[0221] Among them, GPI is a gas transmission behavior indicator, w p PI represents the weight of nodal pressure behavior indicators. p w represents an indicator of nodal pressure behavior. m PI is the weight of pipeline flow behavior indicators. m w represents a pipeline flow behavior indicator. g PI is the weighting of the gas transmission load shedding behavior index. g This is an indicator of gas transmission load loss behavior.

[0222] Optionally, the comprehensive behavioral index evaluation module 203 is specifically used for:

[0223] The comprehensive behavioral index of the gas-electric coupling system is determined according to the following formula.

[0224] IPI=w ele ·EPI+w gas GPI

[0225] Wherein, IPI represents the comprehensive behavioral index of the gas-electric coupling system, w ele Represents the power system weights, EPI is the power behavior index, and w gas GPI represents the weight of the gas transmission system and is a gas transmission behavior indicator.

[0226] A safety assessment of the gas-electric coupling system is conducted based on the comprehensive behavioral indicators of the gas-electric coupling system.

[0227] Taking a large-scale gas-electric coupling system as an example, the natural gas system is a simplified version of the actual natural gas pipeline network in a certain area, such as... Figure 2 As shown; the power system is a 300-node network formed by connecting ten IEEE 30-node models via tie lines, such as... Figure 3 As shown. Let the current natural gas system load flow rate be as follows: Figure 4 As shown, the horizontal axis represents the load number, and the vertical axis represents the mass flow rate, in kg / s. The power system load power and generator output are respectively shown in the figures. Figure 5 and Figure 6 As shown. Figure 5 In the diagram, the horizontal axis represents the busbar number, and the vertical axis represents the power system load power, in MW. Figure 6In the diagram, the horizontal axis represents the unit number, and the vertical axis represents the power of the power system units, in MW. The main system safety constraints include: bus voltage range of 0.9–1.1 pu, line power flow range of 0–800 MW; pipeline branch flow velocity range of 0–15 m / s, and node pressure range as follows: Figure 7 As shown in the figure, the horizontal axis represents the node number, and the vertical axis represents the pressure, in bar.

[0228] The comprehensive set of anticipated faults is still defined according to the N-1 principle. The total number of anticipated faults after rapid filtering is 871, including 7 gas source faults, 137 natural gas pipeline faults, 39 non-zero non-gas unit load faults, 428 power line faults, 60 generator set faults, and 200 power load faults.

[0229] The weight of the load shedding index was set to 1, and the weight of all other limit-crossing indices was set to 0.1. Due to the higher safety requirements of the power system, the weight of the power system and the natural gas system in the comprehensive behavioral indicators was set to 10:1; simultaneously, the expansion coefficient ε for the load shedding index was set to 200, and the frequency of each index was set to n=2. After fault scanning, 95 anticipated faults requiring detailed analysis were identified, namely 4 gas source faults, 89 natural gas pipeline faults, and 2 generator set faults.

[0230] In this embodiment, the simulation time window is T = 12h. Assuming the fault occurs at time 0, to simulate load fluctuations during the daytime rush hour, all natural gas and electricity load changes (expressed in per-unit values) are as follows: Figure 8 As shown in the figure, the horizontal axis represents time in hours (h), and the vertical axis represents per-unit values.

[0231] The calculation results of the comprehensive behavioral index of the quasi-dynamic gas-electric coupling system are as follows: Figure 9As shown in the figure, the horizontal axis represents time (in hours), the vertical axis represents the fault number, and the right-hand scale represents the comprehensive behavioral index value of the gas-electric coupling system. The darker the color, the larger the comprehensive behavioral index of the gas-electric coupling system, and the greater the severity of the fault. A safety assessment of the gas-electric coupling system is conducted based on the comprehensive behavioral index: Overall, the severity of faults in the power system (faults 94-95) is lower than that in the natural gas system (faults 1-93). This is because, in this embodiment, the power system is interconnected, and the mutual support capacity between power sources is stronger after a fault. In contrast, the natural gas system has a more branched network, and multiple branch faults will lead to load unsustainability, resulting in a load loss accident. The severity of the load loss accident is greater, hence the larger behavioral index. The comprehensive behavioral index of the gas-electric coupling system more accurately represents the severity and occurrence time of different faults. Some faults have lower severity, such as fault 34 (pipeline 116). Although the fault will result in a load loss, because the load is small, its sustainable supply time is very long. During this time, fault repair may have already been completed, and the load does not need to take any measures. Some faults are of moderate severity, such as fault 66 (pipeline 91). Although the fault ultimately leads to a significant load loss, the controllable time is relatively long. Active control measures can be taken to mitigate the impact of the fault, such as adjusting the output of the gas turbine unit on the faulty pipeline branch or replacing the electro-gas coupled load with electricity. However, some faults are of very high severity, such as fault 11 (pipeline 15). These faulty pipelines often support large loads, and the impact after a fault is significant and rapid, making them weak links in the system operation. The planning should consider equipping them with energy storage or other supplementary energy devices, or considering expanding backup pipelines.

[0232] This embodiment proposes a quasi-dynamic safety assessment device suitable for gas-electric coupling systems. This device fully considers that the transient process time constant of a natural gas system is much larger than that of an electric system. In modeling the coupled system, a steady-state model is used for the electric system, while a dynamic model is used for the gas transmission system. By fully considering time-varying factors, behavioral indicators are calculated, which can describe the characteristics of the fault evolution process and more reasonably quantify the impact of anticipated faults on system safety. It also more accurately represents the severity and occurrence time of different faults, further improving the safety of system operation.

[0233] Based on the same inventive concept, embodiments of the present invention also provide an electronic device, the structure of which is as follows: Figure 11 As shown, it includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the aforementioned safety assessment method for a gas-electric coupling system.

[0234] Based on the same inventive concept, embodiments of the present invention also provide a computer storage medium storing computer-executable instructions, which, when executed, implement the aforementioned safety assessment method for a gas-electric coupling system.

[0235] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

Claims

1. A method for safety assessment of a gas-electric coupling system, characterized in that, The method comprises the following steps: According to the node voltage behavior index, branch power flow behavior index and power loss behavior index in the gas-electric coupling system, the power behavior index is set; wherein, according to the upper and lower limit constraints of the node voltage in the gas-electric coupling system, the node voltage behavior index is set; according to the upper limit constraint of the branch power flow in the gas-electric coupling system, the branch power flow behavior index is set; according to the power system loss load ratio in the gas-electric coupling system, the power loss behavior index is set; the power behavior index is obtained by weighted summation of the node voltage behavior index, the branch power flow behavior index and the power loss behavior index; According to the node pressure behavior index, pipeline flow behavior index and gas transmission loss behavior index in the gas-electric coupling system, the gas transmission behavior index is set; wherein, according to the upper and lower limit constraints of the node pressure in the gas-electric coupling system, the node pressure behavior index is set; according to the upper limit constraint of the pipeline flow in the gas-electric coupling system, the pipeline flow behavior index is set; according to the gas transmission system loss load ratio in the gas-electric coupling system, the gas transmission loss behavior index is set; the gas transmission behavior index is obtained by weighted summation of the node pressure behavior index, the pipeline flow behavior index and the gas transmission loss behavior index; According to the power behavior index and the gas transmission behavior index, the comprehensive behavior index of the gas-electric coupling system is determined, and the safety of the gas-electric coupling system is evaluated according to the comprehensive behavior index of the gas-electric coupling system.

2. The method of claim 1, wherein, The method according to the upper and lower limit constraints of the node voltage in the gas-electric coupling system, setting the node voltage behavior index, comprises the following steps: The node voltage behavior index is set according to the following formula, wherein, represents a node voltage behavior indicator, i is a node number, is a weight of the node voltage behavior indicator for node i, is a current voltage of node i, is an upper voltage limit constraint for node i, is a lower voltage limit constraint for node i, is a scaling exponent.

3. The method of claim 1, wherein, The method according to the upper limit constraint of the branch power flow in the gas-electric coupling system, setting the branch power flow behavior index, comprises the following steps: The branch power flow behavior index is set according to the following formula, wherein, represents a branch flow behavior indicator, is a branch number, is a branch weight of the branch flow behavior indicator, is a current flow of the branch is an upper flow limit constraint of the branch is an expansion index.​​ 4. The method of claim 1, wherein, The method according to the power system loss load ratio in the gas-electric coupling system, setting the power loss behavior index, comprises the following steps: The power loss behavior index is set according to the following formula, wherein, represents the power loss load behavior index, D is the power load number, is the power expected load, is the power actual supplyable load, is the expansion coefficient of the power loss load behavior index, is the power loss load behavior index weight of the power load D, is the expansion index.

5. The method of claim 1, wherein, The method according to the upper and lower limit constraints of the node pressure in the gas-electric coupling system, setting the node pressure behavior index, comprises the following steps: The node pressure behavior index is set according to the following formula, wherein, represents a node gas pressure behavior indicator, i is a node number, is a weight of the node gas pressure behavior indicator for node i, is a current gas pressure of node i, is an upper gas pressure limit constraint for node i, is a lower gas pressure limit constraint for node i, is an expansion index.

6. The method of claim 1, wherein, The method according to the upper limit constraint of the pipeline flow in the gas-electric coupling system, setting the pipeline flow behavior index, comprises the following steps: The pipeline flow behavior index is set according to the following formula, wherein, represents a pipeline flow behavior indicator, is a pipeline number, is a pipeline weight of the pipeline flow behavior indicator, is a current flow of the pipeline is a tidal flow upper limit constraint of the pipeline is an expansion index.​​ 7. The method of claim 1, wherein, The method according to the gas transmission system loss load ratio in the gas-electric coupling system, setting the gas transmission loss behavior index, comprises the following steps: The gas transmission loss behavior index is set according to the following formula, wherein, is the gas transmission off-load behavior index, G is the natural gas load number, is the expected load of the natural gas load G, is the actual supplyable load of the natural gas load G, is the expansion factor of the gas transmission off-load behavior index, is the weight of the gas transmission off-load behavior index of the natural gas load G, is the expansion index.

8. The method of claim 1, wherein, The method according to the node voltage behavior index, the branch power flow behavior index and the power loss behavior index in the gas-electric coupling system, setting the power behavior index, comprises the following steps: The power behavior index is set according to the following formula, wherein, is a power behavior index, is a weight of a node voltage behavior index, denotes a node voltage behavior index, is a weight of a branch power flow behavior index, denotes a branch power flow behavior index, is a weight of a power loss load behavior index, denotes a power loss load behavior index.

9. The method of claim 1, wherein, The method according to the node pressure behavior index, the pipeline flow behavior index and the gas transmission loss behavior index in the gas-electric coupling system, setting the gas transmission behavior index, comprises the following steps: The gas transmission behavior index is set according to the following formula, wherein, is a gas delivery behavior index, is a weight for a node pressure behavior index, represents a node pressure behavior index, is a weight for a pipeline flow behavior index, represents a pipeline flow behavior index, is a weight for a gas delivery offload behavior index, is a gas delivery offload behavior index.

10. The method of claim 1, wherein, The method according to the power behavior index and the gas transmission behavior index, determining the comprehensive behavior index of the gas-electric coupling system, comprises the following steps: The comprehensive behavior index of the gas-electric coupling system is determined according to the following formula, wherein, represents the gas-electric coupling system comprehensive behavior index, represents the power system weight, is the power behavior index, represents the gas transmission system weight, is the gas transmission behavior index.

11. An electroaerodynamic coupling system safety assessment apparatus, comprising: It comprises: The power behavior index setting module is configured to set the power behavior index according to a node voltage behavior index, a branch power flow behavior index, and a power loss behavior index in the gas-electricity coupling system; the node voltage behavior index is set according to an upper and lower limit constraint of the node voltage in the gas-electricity coupling system; the branch power flow behavior index is set according to an upper limit constraint of the branch power flow in the gas-electricity coupling system; and the power loss behavior index is set according to a power system loss load ratio in the gas-electricity coupling system; the power behavior index is obtained by weighted summation of the node voltage behavior index, the branch power flow behavior index, and the power loss behavior index; The gas transmission behavior index setting module is configured to set the gas transmission behavior index according to a node gas pressure behavior index, a pipeline flow behavior index, and a gas transmission loss behavior index in the gas-electricity coupling system; the node gas pressure behavior index is set according to an upper and lower limit constraint of the node gas pressure in the gas-electricity coupling system; the pipeline flow behavior index is set according to an upper limit constraint of the pipeline flow in the gas-electricity coupling system; and the gas transmission loss behavior index is set according to a gas transmission system loss load ratio in the gas-electricity coupling system; the gas transmission behavior index is obtained by weighted summation of the node gas pressure behavior index, the pipeline flow behavior index, and the gas transmission loss behavior index; The comprehensive behavior index evaluation module is configured to determine a gas-electricity coupling system comprehensive behavior index according to the power behavior index and the gas transmission behavior index, and perform a safety evaluation on the gas-electricity coupling system according to the gas-electricity coupling system comprehensive behavior index.

12. The apparatus of claim 11, wherein, The node voltage behavior index setting module is specifically configured to: set the node voltage behavior index according to the following formula, wherein, represents a node voltage behavior indicator, i is a node number, is a weight of the node voltage behavior indicator for node i, is a current voltage of node i, is an upper voltage limit constraint for node i, is a lower voltage limit constraint for node i, is a scaling exponent.

13. The apparatus of claim 11, wherein, The branch power flow behavior index setting module is specifically configured to: set the branch power flow behavior index according to the following formula, wherein, denotes a branch flow behavior indicator, is a branch number, is a branch weight of the branch flow behavior indicator, is a current flow of the branch is a current flow of the branch is an upper flow limit constraint of the branch is an upper flow limit constraint of the branch is an expansion index.

14. The apparatus of claim 11, wherein, The power loss behavior index setting module is specifically configured to: set the power loss behavior index according to the following formula, wherein, represents the power loss load behavior index, D is the power load number, is the power expected load, is the power actual supplyable load, is the expansion coefficient of the power loss load behavior index, is the power loss load behavior index weight of the power load D, is the expansion index.

15. The apparatus of claim 11, wherein, The node gas pressure behavior index setting module is specifically configured to: set the node gas pressure behavior index according to the following formula, wherein, represents a node gas pressure behavior indicator, i is a node number, is a weight of the node gas pressure behavior indicator for node i, is a current gas pressure of node i, is an upper gas pressure limit constraint for node i, is a lower gas pressure limit constraint for node i, is an expansion index.

16. The apparatus of claim 11, wherein, The pipeline flow behavior index setting module is specifically configured to: set the pipeline flow behavior index according to the following formula, wherein, represents a pipeline flow behavior indicator, is a pipeline number, is a pipeline a weight of the pipeline flow behavior indicator of the pipeline, is a current flow of the pipeline is a tidal flow upper limit constraint of the pipeline is an expansion index.​​ 17. The apparatus of claim 11, wherein, The gas transmission loss behavior index setting module is specifically configured to: set the gas transmission loss behavior index according to the following formula, wherein, is the gas transmission off-load behavior index, G is the natural gas load number, is the expected load of the natural gas load G, is the actual supplyable load of the natural gas load G, is the expansion factor of the gas transmission off-load behavior index, is the gas transmission off-load behavior index weight of the natural gas load G, is the expansion index.

18. The apparatus of claim 11, wherein, The power behavior index setting module is specifically configured to: set the power behavior index according to the following formula, wherein, is a power behavior index, is a weight of a node voltage behavior index, denotes a node voltage behavior index, is a weight of a branch power flow behavior index, denotes a branch power flow behavior index, is a weight of a power loss load behavior index, denotes a power loss load behavior index.

19. The apparatus of claim 11, wherein, The gas transmission behavior index setting module is specifically configured to: set the gas transmission behavior index according to the following formula, wherein, is a weight for the gas transmission behavior index, is a weight for the node pressure behavior index, represents the node pressure behavior index, is a weight for the pipe flow behavior index, represents the pipe flow behavior index, is a weight for the gas transmission offload behavior index, is the gas transmission offload behavior index.

20. The apparatus of claim 11, wherein, The comprehensive behavior index evaluation module is specifically configured to: determine a gas-electricity coupling system comprehensive behavior index according to the following formula, wherein, represents the gas-electric coupling system comprehensive behavior index, represents the power system weight, is the power behavior index, represents the gas transmission system weight, is the gas transmission behavior index; perform a safety evaluation on the gas-electricity coupling system according to the gas-electricity coupling system comprehensive behavior index.

21. An electronic device, comprising: It comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the gas-electricity coupling system safety evaluation method of any one of claims 1-10 when executing the computer program.

22. A computer storage medium, comprising, The computer storage medium stores computer executable instructions, and the computer executable instructions implement the gas-electricity coupling system safety evaluation method of any one of claims 1-10 when executed.

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