Start control method and device for natural gas differential pressure expansion generator set

Abstract

The invention provides a starting control method and device for a natural gas differential pressure expansion generator set. The method comprises the steps that a power generation starting instruction for the generator set is obtained; in response to the acquisition of the power generation starting instruction, acquiring generator set protection associated information of a natural gas high-pressure pipe network communicated with a generator set; detecting whether the generator set protection associated information meets a corresponding power generation starting condition or not; if the generator set protection association information meets the corresponding power generation starting condition, natural gas real-time attribute information of the natural gas high-pressure pipe network is obtained; and based on the real-time attribute information of the natural gas, the target opening degree of a natural gas inlet valve of the natural gas high-pressure pipe network is set when the generator set safely starts power generation work. According to the technical scheme, the one-time stable starting success rate of the natural gas high-pressure pipe network differential pressure expansion generator set can be effectively increased.

Description

[Technical field]

[0001] The present application relates to the technical field of natural gas power generation, and in particular to a startup control method and device for a natural gas differential pressure expansion generator set. [Background technology]

[0002] The natural gas high-pressure pipeline network uses high-pressure natural gas from self-built devices, which enters the differential pressure expansion power generation device through parallel pipelines. In the differential pressure expansion power generation skid, the high-pressure natural gas is reduced in pressure and expanded at the expansion end through the expansion unit, and the electricity is generated and incorporated into the power grid. At this point, the natural gas after pressure reduction and expansion enters the downstream. This pressure reduction process contains abundant pressure energy, and the use of pressure differential expansion power generation can convert pressure energy into electrical energy, which greatly improves the energy utilization rate, can effectively utilize resources, and can achieve energy conservation and emission reduction, and play a positive role in promoting the construction of a resource-saving and environmentally friendly society.

[0003] However, during the startup process of the natural gas high-pressure pipeline differential pressure expansion power generation system, the natural gas high-pressure pipeline may have unstable pressure and unstable flow. Under the impact of unstable natural gas flow, overspeed shutdown is prone to occur, affecting the power generation efficiency. At the same time, the impact of unstable natural gas flow may also bring great safety risks.

[0004] Therefore, how to reasonably control the start-up of the generator set for natural gas differential pressure expansion power generation to avoid the occurrence of unstable natural gas flow shock has become a technical problem that needs to be solved urgently. [Summary of the invention]

[0005] The embodiments of the present application provide a startup control method and device for a natural gas differential pressure expansion generator set, aiming to solve the technical problem in the related art that unstable natural gas flow shock occurs when the generator set starts during the natural gas differential pressure expansion power generation process, resulting in impaired power generation efficiency and increased safety risks.

[0006] In a first aspect, an embodiment of the present application provides a startup control method for a natural gas differential pressure expansion generator set, comprising:

[0007] Obtaining a power generation start instruction for a generator set;

[0008] In response to the acquisition of the power generation start instruction, the generator set protection associated information of the natural gas high-pressure pipeline network to which the generator set is connected is acquired, wherein the generator set protection associated information is used to reflect the readiness of the generator set itself and the environment in which it is located for power generation;

[0009] Detecting whether the generator set protection-related information meets the corresponding power generation start-up condition, wherein the power generation condition is used to reflect the actual level that the generator set protection-related information needs to reach when the generator set safely starts power generation in the natural gas high-pressure pipeline network;

[0010] If the generator set protection associated information meets the corresponding power generation start-up condition, obtaining the natural gas real-time attribute information of the natural gas high-pressure pipeline network, wherein the natural gas real-time attribute information includes the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network;

[0011] Based on the real-time attribute information of natural gas, a target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network is set when the generator set safely starts power generation.

[0012] In one embodiment of the present application, optionally, the generator set protection associated information includes safe start condition associated parameters and interlocking state associated parameters, wherein:

[0013] The safety start condition associated parameters include: lubricating oil cooler temperature, lubricating oil main pipe pressure, expander inlet valve position switch state, expander quick closing valve position switch state, natural gas inlet valve temperature, natural gas inlet valve pressure, natural gas inlet valve flow, opening of a designated valve other than the natural gas inlet valve in the natural gas high-pressure pipeline network, internal ambient humidity and external ambient humidity of the generator set, and one or more of the internal ambient temperature and external ambient temperature of the generator set;

[0014] The interlocking state associated parameters include: generator output power, natural gas inlet filter pressure difference, expander inlet natural gas pressure, lubricating oil main pipe pressure, expander speed, lubricating oil tank liquid level, the pressure difference between the first-level sealing air pressure and the reference air pressure, the pressure after the low-pressure nitrogen pressure reducing valve, the first-level leakage gas flow on the balancing side, the first-level leakage gas pressure on the balancing side, the expander bearing temperature, the generator bearing temperature, the expander bearing vibration, and the expander speed. One or more of them.

[0015] In one embodiment of the present application, optionally, the detecting whether the generator set protection associated information satisfies the corresponding power generation start condition includes:

[0016] Detecting whether at least one of the safety startup condition-related parameters reaches a corresponding lower limit value, and detecting whether at least one of the interlocking state-related parameters exceeds a corresponding upper limit value, wherein:

[0017] If the detected safety start condition-related parameters all reach the corresponding lower limit values, and the detected interlocking state-related parameters do not exceed the corresponding upper limit values, it is determined that the generator set protection-related information meets the corresponding power generation start condition.

[0018] In one embodiment of the present application, optionally, before obtaining the power generation start instruction for the generator set, the method further includes:

[0019] At every preset time interval, the generator set protection related information of the natural gas high-pressure pipeline network connected to the generator set is collected by a first information collection device;

[0020] The obtaining of generator set protection related information of the natural gas high-pressure pipeline network to which the generator set is connected includes:

[0021] Among all the collected generator set protection-related information, a group of the generator set protection-related information with the latest timestamp is obtained.

[0022] In one embodiment of the present application, optionally, before obtaining the power generation start instruction for the generator set, the method further includes:

[0023] At preset time intervals, collecting real-time attribute information of natural gas from the natural gas high-pressure pipeline network through a second information collection device;

[0024] The obtaining of the real-time attribute information of natural gas from the natural gas high-pressure pipeline network includes:

[0025] The real-time attribute information of the natural gas collected currently and the real-time attribute information of the natural gas collected in the previous time adjacent to the current time are obtained.

[0026] In one embodiment of the present application, optionally, setting the target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network when the generator set safely starts power generation based on the real-time natural gas attribute information includes:

[0027] Acquire the first valve opening corresponding to the currently collected natural gas real-time attribute information, the second valve opening corresponding to the previous collected natural gas real-time attribute information, and the current opening of the natural gas inlet valve;

[0028] Determine the difference between the real-time attribute information of natural gas collected at the current time and the real-time attribute information collected at the previous time;

[0029] When the difference is greater than zero,

[0030] If the first valve opening is greater than the current opening, setting the target opening of the natural gas inlet valve to the second valve opening;

[0031] If the first valve opening is less than or equal to the current opening, setting the target opening of the natural gas inlet valve to the first valve opening;

[0032] When the difference is less than or equal to zero,

[0033] The target opening of the natural gas inlet valve is set to be the first valve opening.

[0034] In one embodiment of the present application, optionally, setting the target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network when the generator set safely starts power generation based on the real-time natural gas attribute information includes:

[0035] Acquire the first valve opening corresponding to the currently collected natural gas real-time attribute information, the second valve opening corresponding to the previous collected natural gas real-time attribute information, and the current opening of the natural gas inlet valve;

[0036] Determine the inlet pressure difference and inlet flow difference between the current collection and the adjacent previous collection;

[0037] determining a first safety degree of the first valve opening based on first weights of the first valve opening, the inlet pressure difference, and the inlet flow rate difference;

[0038] determining a second safety degree of the second valve opening based on second weights of the second valve opening, the inlet pressure difference, and the inlet flow difference, respectively;

[0039] Wherein, the first weight of the first valve opening is the first preset value corresponding to the first valve opening in the preset valve opening weight sequence, the second weight of the second valve opening is the second preset value corresponding to the second valve opening in the preset valve opening weight sequence, the first weight of the inlet pressure difference is the proportion of the number of times the target opening is set based on the inlet pressure in the first historical safety startup data, the first weight of the inlet flow difference is the proportion of the number of times the target opening is set based on the inlet flow in the first historical safety startup data, the second weight of the inlet pressure difference is the proportion of the number of times the target opening is set based on the inlet pressure in the second historical safety startup data, and the second weight of the inlet flow difference is the proportion of the number of times the target opening is set based on the inlet flow in the second historical safety startup data;

[0040] If the first safety degree is greater than the second safety degree, setting the target opening of the natural gas inlet valve to the first valve opening;

[0041] If the first safety degree is smaller than the second safety degree, the target opening of the natural gas inlet valve is set to the second valve opening.

[0042] In a second aspect, an embodiment of the present application provides a startup control device for a natural gas differential pressure expansion generator set, comprising:

[0043] A power generation start instruction acquisition unit, used to acquire a power generation start instruction for a generator set;

[0044] A generator set protection associated information acquisition unit, used for acquiring the generator set protection associated information of the natural gas high pressure pipeline network to which the generator set is connected in response to the acquisition of the power generation start instruction, wherein the generator set protection associated information is used to reflect the readiness of the generator set itself and the environment in which it is located for power generation;

[0045] A power generation start-up condition detection unit, used to detect whether the protection-related information of the generator set meets the corresponding power generation start-up condition, wherein the power generation condition is used to reflect the actual level that the protection-related information of the generator set needs to reach when the generator set safely starts power generation in the natural gas high-pressure pipeline network;

[0046] A natural gas real-time attribute information acquisition unit, configured to acquire the natural gas real-time attribute information of the natural gas high-pressure pipeline network if the generator set protection associated information meets the corresponding power generation start-up condition, wherein the natural gas real-time attribute information includes the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network;

[0047] The target opening setting unit is used to set the target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network when the generator set safely starts power generation based on the real-time attribute information of the natural gas.

[0048] In one embodiment of the present application, optionally, the generator set protection associated information includes safe start condition associated parameters and interlocking state associated parameters, wherein:

[0049] The safety start condition associated parameters include: lubricating oil cooler temperature, lubricating oil main pipe pressure, expander inlet valve position switch state, expander quick closing valve position switch state, natural gas inlet valve temperature, natural gas inlet valve pressure, natural gas inlet valve flow, opening of a designated valve other than the natural gas inlet valve in the natural gas high-pressure pipeline network, internal ambient humidity and external ambient humidity of the generator set, and one or more of the internal ambient temperature and external ambient temperature of the generator set;

[0050] The interlocking state associated parameters include: generator output power, natural gas inlet filter pressure difference, expander inlet natural gas pressure, lubricating oil main pipe pressure, expander speed, lubricating oil tank liquid level, the pressure difference between the first-level sealing air pressure and the reference air pressure, the pressure after the low-pressure nitrogen pressure reducing valve, the first-level leakage gas flow on the balancing side, the first-level leakage gas pressure on the balancing side, the expander bearing temperature, the generator bearing temperature, the expander bearing vibration, and the expander speed. One or more of them.

[0051] In one embodiment of the present application, optionally, the power generation start condition detection unit is used to: detect whether at least one of the safety start condition associated parameters has reached the corresponding lower limit value, and detect whether at least one of the interlocking status associated parameters has exceeded the corresponding upper limit value, wherein if the detected safety start condition associated parameters all reach the corresponding lower limit value, and the detected interlocking status associated parameters do not exceed the corresponding upper limit value, it is determined that the generator set protection associated information meets the corresponding power generation start condition.

[0052] In one embodiment of the present application, optionally, the device further includes:

[0053] A first real-time collection unit, configured to collect, at preset time intervals, generator set protection-related information of the natural gas high-pressure pipeline network to which the generator set is connected through a first information collection device;

[0054] The generator set protection associated information acquisition unit is used to: acquire a group of the generator set protection associated information with the latest timestamp from all the collected generator set protection associated information.

[0055] In one embodiment of the present application, optionally, the device further includes:

[0056] A second real-time collection unit, configured to collect the real-time attribute information of natural gas from the natural gas high-pressure pipeline network through a second information collection device at every preset time interval;

[0057] The natural gas real-time attribute information acquisition unit is used to acquire the natural gas real-time attribute information currently collected and the natural gas real-time attribute information collected in the previous time adjacent to the current time.

[0058] In one embodiment of the present application, optionally, the target opening setting unit includes:

[0059] An opening information acquisition unit, used to acquire the first valve opening corresponding to the currently collected natural gas real-time attribute information, the second valve opening corresponding to the previous collected natural gas real-time attribute information, and the current opening of the natural gas inlet valve;

[0060] A difference determination unit, used to determine the difference between the real-time attribute information of natural gas collected at the current time and the real-time attribute information collected at the previous time;

[0061] a first opening setting unit, configured to, when the difference is greater than zero, set the target opening of the natural gas inlet valve to the second valve opening if the first valve opening is greater than the current opening; and set the target opening of the natural gas inlet valve to the first valve opening if the first valve opening is less than or equal to the current opening;

[0062] The second opening setting unit is used to set the target opening of the natural gas inlet valve to the first valve opening when the difference is less than or equal to zero.

[0063] In one embodiment of the present application, optionally, the target opening setting unit includes:

[0064] An opening information acquisition unit, used to acquire the first valve opening corresponding to the currently collected natural gas real-time attribute information, the second valve opening corresponding to the previous collected natural gas real-time attribute information, and the current opening of the natural gas inlet valve;

[0065] A difference determination unit, used to determine the difference between the inlet pressure and the inlet flow rate collected at the current time and the previous time;

[0066] a safety degree calculation unit, configured to determine a first safety degree of the first valve opening based on first weights of the first valve opening, the inlet pressure difference, and the inlet flow difference, and to determine a second safety degree of the second valve opening based on second weights of the second valve opening, the inlet pressure difference, and the inlet flow difference,

[0067] Wherein, the first weight of the first valve opening is the first preset value corresponding to the first valve opening in the preset valve opening weight sequence, the second weight of the second valve opening is the second preset value corresponding to the second valve opening in the preset valve opening weight sequence, the first weight of the inlet pressure difference is the proportion of the number of times the target opening is set based on the inlet pressure in the first historical safety startup data, the first weight of the inlet flow difference is the proportion of the number of times the target opening is set based on the inlet flow in the first historical safety startup data, the second weight of the inlet pressure difference is the proportion of the number of times the target opening is set based on the inlet pressure in the second historical safety startup data, and the second weight of the inlet flow difference is the proportion of the number of times the target opening is set based on the inlet flow in the second historical safety startup data;

[0068] a third opening setting unit, configured to set the target opening of the natural gas inlet valve to the first valve opening if the first safety degree is greater than the second safety degree;

[0069] The fourth opening setting unit is used to set the target opening of the natural gas inlet valve to the second valve opening if the first safety degree is smaller than the second safety degree.

[0070] In a third aspect, an embodiment of the present application provides a computer device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are configured to execute the method described in the first aspect above.

[0071] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the method described in the first aspect above.

[0072] The above technical scheme aims at the technical problem that unstable natural gas flow shock occurs when the generator set is started during the natural gas differential pressure expansion power generation process in the related technology, resulting in damage to power generation efficiency and increased safety risks. First, the generator set protection related information of the natural gas high-pressure pipeline network is used to determine whether the generator set has the initial qualification for safe power generation. When it is determined that it has the initial qualification, the opening of the natural gas inlet valve of the natural gas high-pressure pipeline network is adjusted according to the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network. By adjusting the opening, the expansion level of natural gas is limited, and the speed of the generator set is indirectly adjusted, so as to effectively control the generator set to start at a safe level. This can effectively improve the one-time smooth start success rate of the natural gas high-pressure pipeline network pressure differential expansion generator set, improve the working efficiency of the generator set, and then improve the natural gas energy utilization rate, and protect the safety of power production.

Brief Description of the Drawings

[0073] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0074] Figure 1 A flow chart showing a method for starting a natural gas differential pressure expansion generator set according to an embodiment of the present application is shown;

[0075] Figure 2 A flow chart showing a method for starting and controlling a natural gas differential pressure expansion generator set according to another embodiment of the present application is shown;

[0076] Figure 3 A schematic diagram of a control system according to an embodiment of the present application is shown;

[0077] Figure 4 A block diagram of a computer device according to an embodiment of the present application is shown;

[0078] Figure 5A block diagram of a computer device according to another embodiment of the present application is shown. [Specific implementation method]

[0079] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not 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.

[0080] Figure 1 A flow chart of a method for starting and controlling a natural gas differential pressure expansion generator set according to an embodiment of the present application is shown.

[0081] like Figure 1 As shown, according to one embodiment of the present application, a startup control method for a natural gas differential pressure expansion generator set includes:

[0082] Step 102: Obtain a power generation start instruction for the generator set.

[0083] The generator set is used to generate electricity by natural gas differential pressure expansion with the help of natural gas from the connected natural gas high-pressure pipeline network, and the power generation start instruction is used to instruct the generator set to start power generation.

[0084] Step 104, in response to the acquisition of the power generation start instruction, the generator set protection associated information of the natural gas high-pressure pipeline network to which the generator set is connected is acquired, wherein the generator set protection associated information is used to reflect the readiness of the generator set itself and the environment in which it is located for power generation.

[0085] Step 106, detecting whether the generator set protection-related information satisfies the corresponding power generation start-up conditions, wherein the power generation conditions are used to reflect the actual level that the generator set protection-related information needs to reach when the generator set safely starts power generation in the natural gas high-pressure pipeline network.

[0086] After obtaining the power generation start instruction, the generator set protection related information reflecting the readiness of the generator set itself and the environment for power generation is first obtained, and then based on the generator set protection related information, it is determined whether the generator set has the basic qualification for power generation.

[0087] In a possible design, the generator set protection-related information includes safety start condition-related parameters and interlocking state-related parameters.

[0088] Among them, the parameters associated with safe start conditions refer to the characteristics of the generator set itself, the environment, and even the natural gas high-pressure pipeline network to which it is connected, which can affect the safety state of the generator set. Only when these characteristics meet the minimum standards for the generator set to be in a safe state can the generator set be qualified for safe start.

[0089] Among them, the interlocking status associated parameters refer to the characteristics of the generator set itself, the environment, and even the natural gas high-pressure pipeline network to which it is connected, which need to be restricted under safe startup conditions. Only when these characteristics do not exceed the upper limit corresponding to the generator set being in a safe state, can the generator set be qualified for safe startup.

[0090] In one possible design, the safety start condition associated parameters include but are not limited to a combination of one or more of the following: lubricating oil cooler temperature, lubricating oil main pressure, expander inlet valve position switch status, expander quick-closing valve position switch status, natural gas inlet valve temperature, natural gas inlet valve pressure, natural gas inlet valve flow, the opening of a designated valve other than the natural gas inlet valve in the natural gas high-pressure pipeline network, the internal ambient humidity and external ambient humidity of the generator set, and one or more of the internal ambient temperature and external ambient temperature of the generator set.

[0091] In one possible design, the interlocking state associated parameters include but are not limited to a combination of one or more of the following: generator output power, natural gas inlet filter pressure difference, expander inlet natural gas pressure, lubricating oil main pipe pressure, expander speed, lubricating oil tank level, the pressure difference between the first-level sealing air pressure and the reference air pressure, the pressure after the low-pressure nitrogen pressure reducing valve, the first-level leakage gas flow on the balancing side, the first-level leakage gas pressure on the balancing side, the expander bearing temperature, the generator bearing temperature, the expander bearing vibration, and the expander speed.

[0092] On this basis, step 106 specifically includes: detecting whether at least one of the safety start condition associated parameters reaches the corresponding lower limit value, and detecting whether at least one of the interlocking status associated parameters exceeds the corresponding upper limit value, wherein, if the detected safety start condition associated parameters all reach the corresponding lower limit value, and the detected interlocking status associated parameters do not exceed the corresponding upper limit value, it is determined that the generator set protection associated information meets the corresponding power generation start condition.

[0093] That is to say, the parameters associated with the safe start conditions being tested must reach the lower limit of the parameters required for the safe start of the generator set, and the parameters associated with the interlocking status being tested cannot be higher than the upper limit of the parameters required for the safe start of the generator set. Only when this requirement is met can the generator set have the initial qualification for safe start.

[0094] Step 108: If the generator set protection associated information meets the corresponding power generation start-up conditions, obtain the natural gas real-time attribute information of the natural gas high-pressure pipeline network, wherein the natural gas real-time attribute information includes the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network.

[0095] Once the generator set protection-related information meets the corresponding power generation start-up conditions, it means that the generator set has the initial qualifications required for safe start-up. At this point, the real-time attribute information of natural gas from the natural gas high-pressure pipeline network can be further obtained to set the specific parameters required for the safe start-up of the generator set.

[0096] Optionally, only the inlet pressure of the natural gas high-pressure pipeline network may be used as a condition for calculating the specific parameter, or only the inlet flow rate of the natural gas high-pressure pipeline network may be used as a condition for calculating the specific parameter, or both the inlet pressure and the inlet flow rate of the natural gas high-pressure pipeline network may be determined as the condition for calculating the specific parameter.

[0097] Step 110: Based on the real-time attribute information of the natural gas, a target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network is set when the generator set safely starts power generation.

[0098] The inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network reflects the actual stable level of natural gas at the moment of generator set startup, and the actual stable level can be used to determine the size of the opening of the natural gas inlet valve of the natural gas high-pressure pipeline network. In other words, the greater the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network, the lower the actual stable level of natural gas. To ensure the safety of generator set startup, the opening of the natural gas inlet valve of the natural gas high-pressure pipeline network needs to be smaller. Conversely, the smaller the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network, the higher the relative stability of natural gas expansion, and the smaller the opening limit of the natural gas inlet valve of the natural gas high-pressure pipeline network.

[0099] The above technical scheme first determines whether the generator set has the initial qualification for safely starting power generation through the generator set protection associated information of the natural gas high-pressure pipeline network. When it is determined that it has the initial qualification, the opening of the natural gas inlet valve of the natural gas high-pressure pipeline network is adjusted according to the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network. By adjusting the opening, the expansion level of the natural gas is limited, and the speed of the generator set is indirectly adjusted, thereby effectively controlling the generator set to start at a safe level. This can effectively improve the one-time smooth start success rate of the natural gas high-pressure pipeline network pressure differential expansion generator set, improve the working efficiency of the generator set, and then improve the utilization rate of natural gas energy, and protect the safety of power production.

[0100] In a possible design, step 108 includes: obtaining the real-time attribute information of the natural gas collected currently and the real-time attribute information of the natural gas collected in the previous adjacent time of the current time.

[0101] On this basis, the process of setting the target opening includes the following steps.

[0102] First, obtain the first valve opening corresponding to the real-time attribute information of natural gas collected currently, the second valve opening corresponding to the real-time attribute information of natural gas collected previously, and the current opening of the natural gas inlet valve, and then determine the difference between the real-time attribute information of natural gas collected currently and previously.

[0103] Next, when the difference is greater than zero, it indicates that the inlet pressure and / or inlet flow rate of the natural gas high-pressure pipeline network has increased, and the opening of the natural gas inlet valve should not be excessively increased.

[0104] At this time, if the first valve opening is greater than the current opening, it means that the increased inlet pressure and / or inlet flow requires a valve opening greater than the current actual opening of the natural gas inlet valve. Considering the limitation that the opening of the target valve should not be excessively increased, the target opening cannot be directly set to the first valve opening corresponding to the increased inlet pressure and / or inlet flow. At this time, the target opening of the natural gas inlet valve can be set to the second valve opening. The second valve opening is set corresponding to the inlet pressure and / or inlet flow before the increase, is smaller than the first valve opening, and has higher safety.

[0105] At this time, if the first valve opening is less than or equal to the current opening, that is, the first valve opening required corresponding to the increased inlet pressure and / or inlet flow is smaller than the current actual opening of the natural gas inlet valve, at this time, the current actual opening of the natural gas inlet valve can be directly reduced to the first valve opening.

[0106] In addition, when the difference is less than or equal to zero, it indicates that the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network has decreased, and the valve of the natural gas inlet valve needs to be reduced. At this time, the current actual opening of the natural gas inlet valve can be directly reduced to the first valve opening.

[0107] In this way, the opening of the natural gas inlet valve can be effectively adjusted within a safe range to avoid unreasonable increase in valve opening which would lead to increased natural gas instability, thus improving the safety performance of natural gas power supply as a whole.

[0108] It should be added that, before step 102, the generator set protection-related information of the natural gas high-pressure pipeline network connected to the generator set needs to be collected by the first information collection device at preset time intervals. In other words, the action of collecting the generator set protection-related information by the entire system is periodic and continuous, and the system always monitors the changes in the generator set protection-related information to meet the real-time power generation needs that may occur.

[0109] On this basis, step 104 is to obtain a set of generator set protection-related information with the latest timestamp from all the generator set protection-related information that has been collected, that is, to determine whether the generator set has the preliminary qualification for safe startup through the latest set of generator set protection-related information collected.

[0110] Similarly, before step 102, the real-time attribute information of natural gas from the natural gas high-pressure pipeline network can also be collected by the second information collection device at preset time intervals. In other words, the action of collecting the real-time attribute information of natural gas by the entire system is periodic and continuous, and the system always monitors the changes in the real-time attribute information of natural gas to meet the real-time power generation needs that may occur.

[0111] Here, the first information collection device includes a plurality of sensors for collecting various generator set protection-related information as mentioned above. In a possible design, the first information collection device includes a second information collection device for collecting inlet pressure and inlet flow.

[0112] exist Figure 1 Based on the illustrated embodiment, Figure 2 A flow chart of a startup control method for a natural gas differential pressure expansion generator set according to another embodiment of the present application is shown, wherein the opening of the natural gas inlet valve is adjusted in a manner different from that of the previous embodiment.

[0113] like Figure 2 As shown, according to another embodiment of the present application, a startup control method for a natural gas differential pressure expansion generator set includes:

[0114] Step 202, obtaining the first valve opening corresponding to the currently collected natural gas real-time attribute information, the second valve opening corresponding to the immediately previously collected natural gas real-time attribute information, and the current opening of the natural gas inlet valve.

[0115] Step 204, determining the difference in inlet pressure and inlet flow rate collected at the current time and the previous time.

[0116] Step 206, determining a first safety degree of the first valve opening based on first weights of the first valve opening, the inlet pressure difference and the inlet flow difference, and determining a second safety degree of the second valve opening based on second weights of the second valve opening, the inlet pressure difference and the inlet flow difference, respectively.

[0117] The first weight of the first valve opening is the first preset value corresponding to the first valve opening in the preset valve opening weight sequence, and the second weight of the second valve opening is the second preset value corresponding to the second valve opening in the preset valve opening weight sequence. In this regard, different weights can be set for different openings of the natural gas inlet valve, wherein the larger the opening of the natural gas inlet valve, the higher the natural gas instability at the same pressure and flow level, and the smaller the corresponding weight.

[0118] The first weight of the inlet pressure difference is the proportion of the number of times the target opening is set based on the inlet pressure in the first historical safety startup data, and the first weight of the inlet flow difference is the proportion of the number of times the target opening is set based on the inlet flow in the first historical safety startup data.

[0119] Specifically, for any historical safety start-up data in a historical safety start-up, if the opening adjustment direction of the natural gas inlet valve is consistent with the direction of increase or decrease of the inlet pressure, that is, when the inlet pressure increases, the opening of the natural gas inlet valve also increases, and when the inlet pressure decreases, the opening of the natural gas inlet valve also decreases, then the inlet pressure is determined to be a parameter that contributes to the adjustment of the target opening, that is, the target opening is set based on the inlet pressure. The higher the proportion of the number of such settings, the greater the influence of the inlet pressure on the event of the safe start of the generator set, and the level of this influence can be converted into the weight of the change in the inlet pressure, that is, the weight of the inlet pressure difference. Similarly, for any historical safety start-up data in a historical safety start-up, if the opening adjustment direction of the natural gas inlet valve is consistent with the direction of increase or decrease of the inlet flow, that is, when the inlet flow increases, the opening of the natural gas inlet valve also increases, and when the inlet flow decreases, the opening of the natural gas inlet valve also decreases, then the inlet flow is determined to be a parameter that contributes to the adjustment of the target opening, that is, the target opening is set based on the inlet flow. The higher the proportion of the number of times this setting occurs, the greater the influence of the import flow on the safe start-up of the generator set. The level of this influence can be converted into the weight of the change in the import flow, that is, the weight of the import flow difference.

[0120] At the same time, when determining the respective weights of the inlet pressure difference and the inlet flow difference, in order to avoid the same set of historical safety startup data having sample uniformity, different sets of historical safety startup data can be used as the basis for determining the weight of the inlet pressure difference and the weight of the inlet flow difference, respectively. Thus, the second weight of the inlet pressure difference can be set to the proportion of the number of times the target opening is set based on the inlet pressure in the second historical safety startup data, and the second weight of the inlet flow difference can be set to the proportion of the number of times the target opening is set based on the inlet flow in the second historical safety startup data.

[0121] Step 208, if the first safety degree is greater than the second safety degree, setting the target opening of the natural gas inlet valve to the first valve opening; and if the first safety degree is less than the second safety degree, setting the target opening of the natural gas inlet valve to the second valve opening.

[0122] The first safety degree obtained based on the weights of the first valve opening, the inlet pressure difference and the inlet flow difference reflects the stability of natural gas when the natural gas inlet valve is at the first valve opening, or the possibility of safe startup of the generator set. Similarly, the second safety degree obtained based on the weights of the second valve opening, the inlet pressure difference and the inlet flow difference reflects the stability of natural gas when the natural gas inlet valve is at the second valve opening, or the possibility of safe startup of the generator set.

[0123] Therefore, the larger one can be selected between the first safety level and the second safety level. The valve opening corresponding to the larger one can provide the system with higher natural gas stability or the possibility of safe start-up of the generator set.

[0124] In one possible design, a specific method for determining a first safety degree of the first valve opening includes: based on the first weight, determining a weighted average of the first valve opening, the inlet pressure difference, and the inlet flow difference as the first safety degree of the first valve opening.

[0125] In one possible design, a specific method for determining the second safety degree of the second valve opening includes: based on the second weight, determining a weighted average of the second valve opening, the inlet pressure difference and the inlet flow difference as the second safety degree of the second valve opening.

[0126] Figure 3 A schematic diagram of a control system according to an embodiment of the present application is shown.

[0127] like Figure 3As shown, a control system according to an embodiment of the present application includes a data input system module, a differential pressure expansion generator set start-up permission module, an automatic adjustment control module based on natural gas pressure and flow, an active control module for starting speed of the differential pressure expansion generator set, an anti-overspeed protection control module and a differential pressure expansion generator set operation module.

[0128] Among them, the data input system module is used to collect data through the data input module before the unit is operated.

[0129] The differential pressure expansion generator set allows the starting module to judge whether the system is in a non-interlocking state and whether the starting conditions are met before the expander is started and the synchronous generator is closed.

[0130] The automatic regulation and control module based on natural gas pressure and flow can collect pressure and flow data and perform data analysis and processing through the field control system, so as to perform automatic regulation and control based on the results of data analysis and processing.

[0131] The differential pressure expansion generator set starting speed active control module performs a series of timing controls during the start-up phase of the expander, and during the start-up process of the expansion generator set, in the event of an impact of unstable natural gas flow caused by unstable pressure and flow in the natural gas pipeline network, ensures that the expansion generator set starts at a predetermined speed and prevents overspeeding.

[0132] The anti-overspeed protection control module is used to ensure the safe operation of the unit when the unit is in overspeed condition.

[0133] The differential pressure expansion generator set operation module can control the unit to enter the rated speed operation mode after the unit startup process is completed.

[0134] Among them, the inlet regulating valve of the expansion generator set is controllable, and the data analysis of the pressure and flow of the natural gas high-pressure pipeline network is shown in the following example.

[0135] The pipeline inlet pressure △PY203=PT203-PT203′, the flow change difference △FY201=FT201-FT201′, among which PT203 is the inlet pressure measurement data, PT203′ is the original inlet pressure measurement data, FT201 is the inlet flow measurement data, FT201′ is the original inlet flow measurement data, △PY203 is the inlet pressure change data, and △FY201 is the inlet flow change data.

[0136] If △PY203 or △FY201 is in increasing state, if FSET201>PZT201, set PV201=FSET201; if FSET201≤PZT201, set PV201=FSET201.

[0137] If △PY203 and △FY201 remain or decrease, set PV201=FSET201.

[0138] Among them, PV201 is the inlet regulating valve opening data, FSET201 is the inlet regulating valve setting data, PV201′ is the inlet regulating valve original opening data, FSET201′ is the inlet regulating valve original setting data, and PZT201 is the inlet regulating valve position data.

[0139] In an embodiment of the present invention, a technical solution for active control of the starting speed of a natural gas high-pressure pipeline differential pressure expansion generator set is provided. During the startup process of the natural gas high-pressure pipeline differential pressure expansion power generation system, multi-parameter coordination of the stable startup of the unit, active and stable adjustment of the speed and anti-overspeed protection control are achieved, the startup control process under complex working conditions is completed, the success rate of one-time smooth startup of the natural gas high-pressure pipeline differential pressure expansion generator set is improved, the unit efficiency is improved, and the energy utilization rate is improved.

[0140] The embodiment of the present application provides a startup control device for a natural gas differential pressure expansion generator set, comprising:

[0141] A power generation start instruction acquisition unit, used to acquire a power generation start instruction for a generator set;

[0142] A generator set protection associated information acquisition unit, used for acquiring the generator set protection associated information of the natural gas high pressure pipeline network to which the generator set is connected in response to the acquisition of the power generation start instruction, wherein the generator set protection associated information is used to reflect the readiness of the generator set itself and the environment in which it is located for power generation;

[0143] A power generation start-up condition detection unit, used to detect whether the protection-related information of the generator set meets the corresponding power generation start-up condition, wherein the power generation condition is used to reflect the actual level that the protection-related information of the generator set needs to reach when the generator set safely starts power generation in the natural gas high-pressure pipeline network;

[0144] A natural gas real-time attribute information acquisition unit, configured to acquire the natural gas real-time attribute information of the natural gas high-pressure pipeline network if the generator set protection associated information meets the corresponding power generation start-up condition, wherein the natural gas real-time attribute information includes the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network;

[0145] The target opening setting unit is used to set the target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network when the generator set safely starts power generation based on the real-time attribute information of the natural gas.

[0146] In one embodiment of the present application, optionally, the generator set protection associated information includes safe start condition associated parameters and interlocking state associated parameters, wherein:

[0147] The safety start condition associated parameters include: lubricating oil cooler temperature, lubricating oil main pipe pressure, expander inlet valve position switch state, expander quick closing valve position switch state, natural gas inlet valve temperature, natural gas inlet valve pressure, natural gas inlet valve flow, opening of a designated valve other than the natural gas inlet valve in the natural gas high-pressure pipeline network, internal ambient humidity and external ambient humidity of the generator set, and one or more of the internal ambient temperature and external ambient temperature of the generator set;

[0148] The interlocking state associated parameters include: generator output power, natural gas inlet filter pressure difference, expander inlet natural gas pressure, lubricating oil main pipe pressure, expander speed, lubricating oil tank liquid level, the pressure difference between the first-level sealing air pressure and the reference air pressure, the pressure after the low-pressure nitrogen pressure reducing valve, the first-level leakage gas flow on the balancing side, the first-level leakage gas pressure on the balancing side, the expander bearing temperature, the generator bearing temperature, the expander bearing vibration, and the expander speed. One or more of them.

[0149] In one embodiment of the present application, optionally, the power generation start condition detection unit is used to: detect whether at least one of the safety start condition associated parameters has reached the corresponding lower limit value, and detect whether at least one of the interlocking status associated parameters has exceeded the corresponding upper limit value, wherein if the detected safety start condition associated parameters all reach the corresponding lower limit value, and the detected interlocking status associated parameters do not exceed the corresponding upper limit value, it is determined that the generator set protection associated information meets the corresponding power generation start condition.

[0150] In one embodiment of the present application, optionally, the device further includes:

[0151] A first real-time collection unit, configured to collect, at preset time intervals, generator set protection-related information of the natural gas high-pressure pipeline network to which the generator set is connected through a first information collection device;

[0152] The generator set protection associated information acquisition unit is used to: acquire a group of the generator set protection associated information with the latest timestamp from all the collected generator set protection associated information.

[0153] In one embodiment of the present application, optionally, the device further includes:

[0154] A second real-time collection unit, configured to collect the real-time attribute information of natural gas from the natural gas high-pressure pipeline network through a second information collection device at every preset time interval;

[0155] The natural gas real-time attribute information acquisition unit is used to acquire the natural gas real-time attribute information currently collected and the natural gas real-time attribute information collected in the previous time adjacent to the current time.

[0156] In one embodiment of the present application, optionally, the target opening setting unit includes:

[0157] An opening information acquisition unit, used to acquire the first valve opening corresponding to the currently collected natural gas real-time attribute information, the second valve opening corresponding to the previous collected natural gas real-time attribute information, and the current opening of the natural gas inlet valve;

[0158] A difference determination unit, used to determine the difference between the real-time attribute information of natural gas collected at the current time and the real-time attribute information collected at the previous time;

[0159] a first opening setting unit, configured to, when the difference is greater than zero, set the target opening of the natural gas inlet valve to the second valve opening if the first valve opening is greater than the current opening; and set the target opening of the natural gas inlet valve to the first valve opening if the first valve opening is less than or equal to the current opening;

[0160] The second opening setting unit is used to set the target opening of the natural gas inlet valve to the first valve opening when the difference is less than or equal to zero.

[0161] In one embodiment of the present application, optionally, the target opening setting unit includes:

[0162] An opening information acquisition unit, used to acquire the first valve opening corresponding to the currently collected natural gas real-time attribute information, the second valve opening corresponding to the previous collected natural gas real-time attribute information, and the current opening of the natural gas inlet valve;

[0163] A difference determination unit, used to determine the difference between the inlet pressure and the inlet flow rate collected at the current time and the previous time;

[0164] a safety degree calculation unit, configured to determine a first safety degree of the first valve opening based on first weights of the first valve opening, the inlet pressure difference, and the inlet flow difference, and to determine a second safety degree of the second valve opening based on second weights of the second valve opening, the inlet pressure difference, and the inlet flow difference,

[0165] Wherein, the first weight of the first valve opening is the first preset value corresponding to the first valve opening in the preset valve opening weight sequence, the second weight of the second valve opening is the second preset value corresponding to the second valve opening in the preset valve opening weight sequence, the first weight of the inlet pressure difference is the proportion of the number of times the target opening is set based on the inlet pressure in the first historical safety startup data, the first weight of the inlet flow difference is the proportion of the number of times the target opening is set based on the inlet flow in the first historical safety startup data, the second weight of the inlet pressure difference is the proportion of the number of times the target opening is set based on the inlet pressure in the second historical safety startup data, and the second weight of the inlet flow difference is the proportion of the number of times the target opening is set based on the inlet flow in the second historical safety startup data;

[0166] a third opening setting unit, configured to set the target opening of the natural gas inlet valve to the first valve opening if the first safety degree is greater than the second safety degree;

[0167] The fourth opening setting unit is used to set the target opening of the natural gas inlet valve to the second valve opening if the first safety degree is smaller than the second safety degree.

[0168] The device uses any one of the solutions described in the above embodiments, and therefore has all the above technical effects, which will not be repeated here.

[0169] In addition, in one embodiment, the present application provides a computer device, which may be a server, and its internal structure diagram may be as follows: Figure 4 As shown. The computer device includes a processor, a memory, a network interface and a database connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile and / or volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external client via a network connection. When the computer program is executed by the processor, the method described in any of the above embodiments can be implemented.

[0170] In one embodiment, the present application further provides a computer device, which may be a client, and its internal structure diagram may be as follows: Figure 5As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external server via a network connection. When the computer program is executed by the processor, the method described in any of the above embodiments can be implemented.

[0171] Any of the above-mentioned computer devices in the embodiments of the present application may exist in various forms, including but not limited to:

[0172] (1) Mobile communication devices: These devices are characterized by their mobile communication functions and their main purpose is to provide voice and data communications. These terminals include: smart phones (such as iPhone), multimedia phones, functional phones, and low-end phones.

[0173] (2) Ultra-mobile personal computer devices: These devices fall into the category of personal computers, have computing and processing capabilities, and generally also have mobile Internet access features. These terminals include: PDA, MID and UMPC devices, such as iPad.

[0174] (3) Portable entertainment devices: These devices can display and play multimedia content. They include audio and video players (such as iPods), handheld game consoles, e-books, as well as smart toys, wearable devices, and portable car navigation devices.

[0175] (4) Server: A device that provides computing services. The server consists of a processor, hard disk, memory, system bus, etc. The server is similar to a general computer architecture, but because it needs to provide highly reliable services, it has higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0176] (5) Other electronic devices with data interaction functions.

[0177] In addition, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to perform the following steps:

[0178] Obtaining a power generation start instruction for a generator set;

[0179] In response to the acquisition of the power generation start instruction, the generator set protection associated information of the natural gas high-pressure pipeline network to which the generator set is connected is acquired, wherein the generator set protection associated information is used to reflect the readiness of the generator set itself and the environment in which it is located for power generation;

[0180] Detecting whether the generator set protection-related information meets the corresponding power generation start-up condition, wherein the power generation condition is used to reflect the actual level that the generator set protection-related information needs to reach when the generator set safely starts power generation in the natural gas high-pressure pipeline network;

[0181] If the generator set protection associated information meets the corresponding power generation start-up condition, obtaining the natural gas real-time attribute information of the natural gas high-pressure pipeline network, wherein the natural gas real-time attribute information includes the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network;

[0182] Based on the real-time attribute information of natural gas, a target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network is set when the generator set safely starts power generation.

[0183] It should be noted that the above functions or steps that can be implemented by the computer-readable storage medium or computer device can refer to the relevant description in the aforementioned method embodiment. In order to avoid repetition, they will not be described one by one here.

[0184] The technical solution of the present application is described in detail above in conjunction with the accompanying drawings. Through the technical solution of the present application, the generator set protection associated information of the natural gas high-pressure pipeline network is first used to determine whether the generator set has the initial qualification for safely starting power generation. When it is determined that it has the initial qualification, the opening of the natural gas inlet valve of the natural gas high-pressure pipeline network is adjusted according to the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network. By adjusting the opening, the expansion level of the natural gas is limited, and the speed of the generator set is indirectly adjusted, thereby effectively controlling the generator set to start at a safe level. The one-time smooth start success rate of the natural gas high-pressure pipeline network pressure differential expansion generator set can be effectively improved, the working efficiency of the generator set can be improved, and the utilization rate of natural gas energy can be improved, thereby protecting the safety of power production.

[0185] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0186] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0187] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0188] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0189] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0190] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A startup control method for a natural gas differential pressure expansion generator set, characterized in that: include: Obtaining a power generation start instruction for a generator set; In response to the acquisition of the power generation start instruction, the generator set protection associated information of the natural gas high-pressure pipeline network to which the generator set is connected is acquired, wherein the generator set protection associated information is used to reflect the readiness of the generator set itself and the environment in which it is located for power generation; Detecting whether the generator set protection-related information meets the corresponding power generation start-up condition, wherein the power generation condition is used to reflect the actual level that the generator set protection-related information needs to reach when the generator set safely starts power generation in the natural gas high-pressure pipeline network; If the generator set protection associated information meets the corresponding power generation start-up condition, obtaining the natural gas real-time attribute information of the natural gas high-pressure pipeline network, wherein the natural gas real-time attribute information includes the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network; Based on the real-time attribute information of natural gas, a target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network is set when the generator set safely starts power generation.

2. The method according to claim 1, characterized in that The generator set protection related information includes safety start condition related parameters and interlocking state related parameters, wherein: The safety start condition associated parameters include: lubricating oil cooler temperature, lubricating oil main pipe pressure, expander inlet valve position switch state, expander quick closing valve position switch state, natural gas inlet valve temperature, natural gas inlet valve pressure, natural gas inlet valve flow, opening of a designated valve other than the natural gas inlet valve in the natural gas high-pressure pipeline network, internal ambient humidity and external ambient humidity of the generator set, and one or more of the internal ambient temperature and external ambient temperature of the generator set; The interlocking state associated parameters include: generator output power, natural gas inlet filter pressure difference, expander inlet natural gas pressure, lubricating oil main pipe pressure, expander speed, lubricating oil tank liquid level, the pressure difference between the first-level sealing air pressure and the reference air pressure, the pressure after the low-pressure nitrogen pressure reducing valve, the first-level leakage gas flow on the balancing side, the first-level leakage gas pressure on the balancing side, the expander bearing temperature, the generator bearing temperature, the expander bearing vibration, and the expander speed. One or more of them.

3. The method according to claim 2, characterized in that The detecting whether the generator set protection associated information satisfies the corresponding power generation start condition includes: Detecting whether at least one of the safety startup condition-related parameters reaches a corresponding lower limit value, and detecting whether at least one of the interlocking state-related parameters exceeds a corresponding upper limit value, wherein: If the detected safety start condition-related parameters all reach the corresponding lower limit values, and the detected interlocking state-related parameters do not exceed the corresponding upper limit values, it is determined that the generator set protection-related information meets the corresponding power generation start condition.

4. The method according to claim 2, characterized in that: Before obtaining the power generation start instruction for the generator set, the method further includes: At every preset time interval, the generator set protection related information of the natural gas high-pressure pipeline network connected to the generator set is collected by a first information collection device; The obtaining of generator set protection related information of the natural gas high-pressure pipeline network to which the generator set is connected includes: Among all the collected generator set protection-related information, a group of the generator set protection-related information with the latest timestamp is obtained.

5. The method according to any one of claims 1 to 4, characterized in that Before obtaining the power generation start instruction for the generator set, the method further includes: At preset time intervals, collecting real-time attribute information of natural gas from the natural gas high-pressure pipeline network through a second information collection device; The obtaining of the real-time attribute information of natural gas from the natural gas high-pressure pipeline network includes: The real-time attribute information of the natural gas collected currently and the real-time attribute information of the natural gas collected in the previous time adjacent to the current time are obtained.

6. The method according to claim 5, characterized in that The step of setting the target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network when the generator set safely starts power generation based on the real-time natural gas attribute information includes: Acquire the first valve opening corresponding to the currently collected natural gas real-time attribute information, the second valve opening corresponding to the previous collected natural gas real-time attribute information, and the current opening of the natural gas inlet valve; Determine the difference between the real-time attribute information of natural gas collected at the current time and the real-time attribute information collected at the previous time; When the difference is greater than zero, If the first valve opening is greater than the current opening, setting the target opening of the natural gas inlet valve to the second valve opening; If the first valve opening is less than or equal to the current opening, setting the target opening of the natural gas inlet valve to the first valve opening; When the difference is less than or equal to zero, The target opening of the natural gas inlet valve is set to be the first valve opening.

7. The method according to claim 5, characterized in that The step of setting the target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network when the generator set safely starts power generation based on the real-time natural gas attribute information includes: Acquire the first valve opening corresponding to the currently collected natural gas real-time attribute information, the second valve opening corresponding to the previous collected natural gas real-time attribute information, and the current opening of the natural gas inlet valve; Determine the inlet pressure difference and inlet flow difference between the current collection and the adjacent previous collection; determining a first safety degree of the first valve opening based on first weights of the first valve opening, the inlet pressure difference, and the inlet flow rate difference; determining a second safety degree of the second valve opening based on second weights of the second valve opening, the inlet pressure difference, and the inlet flow difference, respectively; Wherein, the first weight of the first valve opening is the first preset value corresponding to the first valve opening in the preset valve opening weight sequence, the second weight of the second valve opening is the second preset value corresponding to the second valve opening in the preset valve opening weight sequence, the first weight of the inlet pressure difference is the proportion of the number of times the target opening is set based on the inlet pressure in the first historical safety startup data, the first weight of the inlet flow difference is the proportion of the number of times the target opening is set based on the inlet flow in the first historical safety startup data, the second weight of the inlet pressure difference is the proportion of the number of times the target opening is set based on the inlet pressure in the second historical safety startup data, and the second weight of the inlet flow difference is the proportion of the number of times the target opening is set based on the inlet flow in the second historical safety startup data; If the first safety degree is greater than the second safety degree, setting the target opening of the natural gas inlet valve to the first valve opening; If the first safety degree is smaller than the second safety degree, the target opening of the natural gas inlet valve is set to the second valve opening.

8. A startup control device for a natural gas differential pressure expansion generator set, characterized in that: include: A power generation start instruction acquisition unit, used to acquire a power generation start instruction for a generator set; A generator set protection associated information acquisition unit, used for acquiring the generator set protection associated information of the natural gas high pressure pipeline network to which the generator set is connected in response to the acquisition of the power generation start instruction, wherein the generator set protection associated information is used to reflect the readiness of the generator set itself and the environment in which it is located for power generation; A power generation start-up condition detection unit, used to detect whether the protection-related information of the generator set meets the corresponding power generation start-up condition, wherein the power generation condition is used to reflect the actual level that the protection-related information of the generator set needs to reach when the generator set safely starts power generation in the natural gas high-pressure pipeline network; A natural gas real-time attribute information acquisition unit, configured to acquire the natural gas real-time attribute information of the natural gas high-pressure pipeline network if the generator set protection associated information meets the corresponding power generation start-up condition, wherein the natural gas real-time attribute information includes the inlet pressure and / or inlet flow of the natural gas high-pressure pipeline network; The target opening setting unit is used to set the target opening of the natural gas inlet valve of the natural gas high-pressure pipeline network when the generator set safely starts power generation based on the real-time attribute information of the natural gas.

9. A computer device, characterized in that: include: at least one processor; and, a memory communicatively coupled to the at least one processor; The memory stores instructions executable by the at least one processor, and the instructions are configured to enable the processor to execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are configured to execute the method according to any one of claims 1 to 7.

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