Park comprehensive energy optimization scheduling method and system

Abstract

The invention discloses a park comprehensive energy optimization scheduling method and system, and belongs to the technical field of energy scheduling, and the method comprises the steps: S1, monitoring surplus electric signals, deficient electric signals and heat supply network low-temperature signals based on a park energy network, and obtaining energy abnormal signals; s2, when the surplus electric signals appear, hydrogen decomposition is carried out based on the corresponding surplus electric signals to obtain hydrogen energy; when the scarcity electric signal appears, hydrogen-electricity conversion is carried out based on hydrogen energy to obtain electric energy, and gas-electricity conversion is carried out based on the park natural gas to obtain electric energy; when a heat supply network low-temperature signal appears, heating is performed based on the park natural gas to obtain heat energy; s3, trimming the park energy network based on the hydrogen energy, the electric energy and the heat energy to eliminate energy abnormal signals; the problems of low scheduling accuracy and low energy utilization rate due to the fact that coupling correlation of loads and energy is not considered in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy scheduling, and specifically to a method and system for optimizing the integrated energy of a park. Background Art

[0002] With the development of the power system, hydrogen energy, which is flexible, efficient, and environmentally friendly, has become an important part of power system scheduling. When the existing technology uses hydrogen energy for power system scheduling, it mostly aims to improve the consumption and scheduling capabilities of renewable energy, and pays less attention to the low-carbon potential of hydrogen energy's participation in the overall operation of the system. Additionally, after the emergence of the carbon capture, utilization, and storage technology (CCUS), when using hydrogen energy for power system scheduling again, it is possible to capture and utilize the carbon molecules generated during the power system scheduling process and related other energy scheduling processes based on CCUS, thereby fully exploiting the low-carbon potential and achieving the cascaded utilization of electrical energy and other energies. However, when the existing technology uses hydrogen energy for low-carbon scheduling, it usually does not consider the coupling relationship between load and energy, resulting in low scheduling accuracy and low energy utilization rate.

[0003] Chinese Patent, Publication No.: CN117035331A, Publication Date: November 10, 2023, discloses a method and device for optimizing the integrated hydrogen-containing energy considering dynamic energy efficiency, including: constructing a hydrogen-containing integrated energy system model; based on the hydrogen-containing integrated energy system model, constructing a hydrogen-containing integrated energy optimization scheduling model considering dynamic energy efficiency; wherein the hydrogen-containing integrated energy optimization scheduling model includes an objective function and constraint conditions; according to the purchased power, wind power output, and purchased natural gas volume obtained at different times within a day, solving the hydrogen-containing integrated energy optimization scheduling model to obtain a hydrogen-containing integrated energy optimization scheduling plan; however, this invention does not consider the coupling relationship between load and energy, resulting in low scheduling accuracy and low energy utilization rate. Summary of the Invention

[0004] The object of the present invention is to address the problem that the existing technology does not consider the coupling relationship between load and energy, resulting in low scheduling accuracy and low energy utilization rate. A method and system for optimizing the integrated energy of a park are proposed. Firstly, based on the surplus power signal, power shortage signal, and low-temperature heat network signal obtained by monitoring the park's energy network, an energy anomaly signal is established. Secondly, dynamic hydrogen energy is obtained by decomposing hydrogen based on the surplus power signal, electrical energy is obtained by hydrogen-electric conversion and gas-electric conversion based on the power shortage signal, and thermal energy is obtained by heating based on the low-temperature heat network signal. Finally, based on hydrogen energy, electrical energy, and thermal energy, the park's energy network is adjusted to eliminate the energy anomaly signal. Through the corresponding energy scheduling of the surplus power signal, power shortage signal associated with the electrical load, and the low-temperature heat network signal associated with the thermal load, namely hydrogen energy, electrical energy, and thermal energy, the present application significantly improves the accuracy of park energy scheduling and greatly improves the utilization rate of park energy.

[0005] In a first aspect, a technical solution provided in an embodiment of the present invention is a method for optimizing the scheduling of integrated energy in a park, including the following steps: S1. Obtain an energy anomaly signal based on monitoring surplus power signals, shortage power signals, and low-temperature signals of the heat network in the park energy network; S2. When a surplus power signal appears, perform hydrogen decomposition on the corresponding surplus electric energy to obtain hydrogen energy; When a shortage power signal appears, perform hydrogen-electricity conversion on the hydrogen energy to obtain electric energy, and perform gas-electricity conversion on the natural gas in the park to obtain electric energy; When a low-temperature signal of the heat network appears, heat the natural gas in the park to obtain heat energy; S3. Trim the park energy network based on the hydrogen energy, electric energy, and heat energy to eliminate the energy anomaly signal.

[0006] In this solution, by monitoring the park energy network, specifically, the park power network and the heat network, when the electrical load and electric power of the power network are not equal, a surplus power signal corresponding to the surplus electric energy when the electric power is greater than the electrical load can be obtained, and a shortage power signal corresponding to the shortage electric energy when the electric power is less than the electrical load can also be obtained. Such a monitoring process can not only detect the dynamic changes of the electrical load, but also detect the dynamic characteristics of the corresponding sources of electric power, such as wind power generation and photovoltaic power generation. Furthermore, the surplus electric energy can be converted into hydrogen energy for storage, and the hydrogen energy can be used for hydrogen-electricity conversion to supplement the shortage of electric energy. If the hydrogen energy is not sufficient to compensate for the shortage of electric energy, the natural gas in the park natural gas network can also be used for gas-electricity conversion to continuously and stably meet the demand of the electrical load power; when the heat load and temperature of the heat network are not equal, a low-temperature signal of the heat network corresponding to when the temperature is less than the heat load can be obtained, and the natural gas in the park natural gas network can be used for heating to obtain heat energy, thereby increasing the temperature of the heat network. It should be noted that the process of heating the natural gas or performing gas-electricity conversion can be the same, and the process of converting the natural gas into heat energy or electric energy does not conflict, and heat energy is also generated during the hydrogen-electricity conversion while generating electric energy; finally, trim the park energy network based on the hydrogen energy, electric energy, and heat energy to eliminate the energy anomaly signal, significantly improving the accuracy of park energy scheduling and greatly enhancing the utilization rate of park energy.

[0007] Preferably, in S1, the specific process of obtaining an energy anomaly signal based on monitoring surplus power signals, shortage power signals, and low-temperature signals of the heat network in the park energy network is as follows: S11. Collect the electrical load power and electric power from the power network in the park energy network, and subtract the electrical load power from the electric power to obtain an electric difference value. If the electric difference value is greater than zero, it is determined that a shortage power signal appears; if the electric difference value is less than zero, it is determined that a surplus power signal appears; if the electric difference value is equal to zero, it is determined that the power network is stable without anomalies; Collect the heat load temperature and the thermal energy temperature in the thermal network of the park, subtract the thermal energy temperature from the heat load temperature to obtain a heat difference value. If the heat difference value is greater than or equal to zero, it is determined that the thermal network is stable and normal. If the heat difference value is less than zero, it is determined that a low-temperature signal of the thermal network appears. S12. Organize the surplus power signal, the shortage power signal, and the low-temperature signal of the thermal network to obtain an energy anomaly signal.

[0008] Preferably, before S2, the hydrogen energy regulation amount, the electric energy regulation amount, and the thermal energy regulation amount are also solved with the goal of minimizing the energy anomaly signal regulation cost. The corresponding objective function is specifically: C TOTAL = min(C BUY + C CO2 + C CC + C CS + C W + C T + C OM ); In the formula, C TOTAL is the energy anomaly signal regulation cost, C BUY is the external energy purchase cost, C CO2 is the carbon trading cost, C CC is the carbon capture cost, C CS is the carbon sequestration cost, C W is the curtailment cost of wind power, C T is the cost of adjusting the electric and thermal flexible loads, C OM is the operation and maintenance cost of the carbon capture equipment.

[0009] In this solution, by solving the hydrogen energy regulation amount, the electric energy regulation amount, and the thermal energy regulation amount with the goal of minimizing the energy anomaly signal regulation cost, a scheduling strategy with minimized cost can be obtained according to the dynamic characteristics of the loads corresponding to different costs and the dynamic characteristics of the corresponding energy sources, effectively improving the consumption capacity of renewable energy and the flexibility of the corresponding integrated energy optimization scheduling system of the park.

[0010] Preferably, in S2, the corresponding mathematical model of hydrogen decomposition is specifically: In the formula, η EL is the hydrogen conversion efficiency, is the electric power at time t, is the hydrogen energy output power at time t, is the electric power at time t + 1, is the minimum value of the ramp-up electric power, is the maximum value of the ramp-up electric power, is the maximum value of the electric power, and EL represents hydrogen decomposition.

[0011] Preferably, in the step S2, the corresponding mathematical model for hydrogen-electric conversion is specifically as follows: In the formula, is the hydrogen energy input power at time t, is the electric output power at time t, is the heat output power at time t, η HFC,e is the hydrogen-electric conversion efficiency, η HFC,h is the hydrogen-heat conversion efficiency, is the hydrogen energy input power at time t + 1, is the maximum value of the hydrogen energy input power, is the minimum value of the hydrogen energy ramp power, is the maximum value of the hydrogen energy ramp power, and HFC represents hydrogen-electric conversion.

[0012] Preferably, in the step S2, carbon molecules are also generated during the gas-electric conversion process and the heating process. Based on the carbon molecules and hydrogen energy, gas conversion is carried out to obtain natural gas.

[0013] In this solution, since carbon molecules are also generated during the gas-electric conversion process and the heating process, the carbon molecules, that is, carbon dioxide, will have an impact on the environment and cause the greenhouse effect, etc. At the same time, the carbon molecules can be converted in the corresponding equipment to generate natural gas. In this application, carbon capture is carried out first to effectively avoid the impact of the escape of the carbon molecules on the environment. Then, the carbon molecules are used as raw materials and combined with hydrogen energy to generate natural gas in the corresponding equipment, improving the consumption capacity of renewable electric energy. When the capture efficiency of the carbon molecules is greater than the conversion efficiency, the carbon molecules are sequestered by the CCUS sequestration technology. In addition to avoiding the escape of carbon molecules, the stored carbon molecules can also be used to maintain the production efficiency of natural gas and improve the secondary utilization ability of the hydrogen energy.

[0014] Preferably, the corresponding mathematical model for the gas conversion is specifically as follows: In the formula, is the hydrogen energy input power in the t time period, is the natural gas output power in the t time period, η MR is the gas conversion efficiency, is the maximum value of the hydrogen energy input power, is the minimum value of the hydrogen energy ramp power, is the hydrogen energy input power in the t + 1 time period, is the maximum value of the hydrogen energy ramp power, and MR represents gas conversion.

[0015] Preferably, in S2, waste heat is also generated during the hydrogen-electricity conversion process, gas-electricity conversion process, and gas conversion process. The waste heat is recovered by a waste heat recovery device, and the heat network in the park energy network is adjusted based on the waste heat.

[0016] In this solution, the main purpose of the hydrogen-electricity conversion process and the gas-electricity conversion process is to produce electricity, and the main purpose of the gas conversion process is to produce natural gas. Heat energy is only a by-product of these three processes. By setting a corresponding waste heat recovery device in the corresponding park integrated energy optimization dispatch system, the heat energy, that is, waste heat, generated during the hydrogen-electricity conversion process, gas-electricity conversion process, and gas conversion process can be transferred to the heat network to adjust the temperature, significantly improving the energy utilization rate.

[0017] Preferably, in S3, the specific process of adjusting the park energy network based on the hydrogen energy, electric energy, and heat energy to eliminate energy abnormal signals is as follows: Collect the hydrogen energy change coefficient based on the hydrogen decomposition process, and compare the hydrogen energy change coefficient with the hydrogen-electricity conversion threshold. When the hydrogen energy change coefficient is equal to the hydrogen-electricity conversion threshold, mark the corresponding energy abnormal signal as a normal signal. When the hydrogen energy change coefficient is less than or greater than the hydrogen-electricity conversion threshold, the corresponding energy abnormal signal remains unchanged; Collect the electric energy change coefficient based on the hydrogen-electricity conversion process and the gas-electricity conversion process, and compare the electric energy change coefficient with the electric energy value of the power shortage signal. If the electric energy change coefficient is equal to the electric energy value, mark the corresponding energy abnormal signal as a normal signal. If the electric energy change coefficient is greater than or less than the electric energy value, the corresponding energy abnormal signal remains unchanged; Collect the heat energy change temperature based on the heating process, and compare the heat energy change temperature with the temperature value of the low-temperature signal of the heat network. If the heat energy change temperature is greater than or equal to the temperature value, mark the corresponding energy abnormal signal as a normal signal. If the heat energy change temperature is less than the temperature value, the corresponding energy abnormal signal remains unchanged.

[0018] In this solution, the process of eliminating the energy anomaly signal is essentially the process of adjusting the energy regulation amount required by the energy network of the corresponding park, that is, the process of supplementing the energy required by the energy network of the park. Therefore, based on the hydrogen decomposition process, the hydrogen energy change coefficient is collected, that is, the hydrogen gas volume corresponding to the generated hydrogen energy. The hydrogen energy change coefficient is compared with the hydrogen-electricity conversion threshold. The hydrogen-electricity conversion threshold is essentially the hydrogen energy regulation amount obtained by solving the problem with the lowest energy anomaly signal regulation cost. Therefore, when the hydrogen energy change coefficient is equal to the hydrogen-electricity conversion threshold, it proves that the required hydrogen energy of the corresponding park energy network has been replenished. Secondly, based on the hydrogen-electricity conversion process and the gas-electricity conversion process, the electric energy change coefficient is collected, that is, the electric energy value corresponding to the generated electric energy. The electric energy change coefficient is compared with the electric energy value of the shortage electric signal. When the electric energy change coefficient is equal to the electric energy value, it proves that the shortage electric energy of the corresponding park energy network has been replenished. It should be noted that when there is surplus electric energy in the park energy network, it will be directly converted into hydrogen energy or abandoned by means such as disconnecting wind power devices and photovoltaic devices, and there is no need to specifically adjust it. In addition, based on the heating process, the heat energy change temperature is collected, that is, the heat energy in the energy conversion process is converted into temperature. The heat energy change temperature is compared with the temperature value of the low-temperature heat network signal. When the heat energy change temperature is greater than or equal to the temperature value, it proves that the required heat energy of the corresponding park energy network has been replenished. Based on this, the energy anomaly signal is eliminated and the stable operation of the corresponding park energy network is maintained.

[0019] On the other hand, another technical solution provided in the embodiments of the present invention is a comprehensive energy optimization scheduling system for a park, including: a hydrogen energy module, a hydrogen conversion module, a gas-electricity conversion module, a gas-heat conversion module, and a waste heat module; The hydrogen energy module decomposes hydrogen based on the surplus electric signal to obtain and store hydrogen energy, transmits the hydrogen energy to the hydrogen conversion module, and performs hydrogen-electricity conversion based on the shortage electric signal and the stored hydrogen to obtain electric energy and heat energy. The electric energy is transmitted to the park power network, and the heat energy is transmitted to the waste heat module; The hydrogen conversion module performs gas conversion based on hydrogen energy to obtain natural gas and heat energy, transmits the natural gas to the park gas network, and transmits the heat energy to the waste heat module; The gas-electricity conversion module performs gas-electricity conversion based on the natural gas in the park gas network and the shortage electric signal to obtain electric energy and heat energy, transmits the electric energy to the park power network, and transmits the heat energy to the waste heat module; The gas-heat conversion module performs heating based on the natural gas in the park gas network and the low-temperature heat network signal to obtain heat energy, and transmits the heat energy to the park heat network; The waste heat module adjusts the temperature of the park heat network based on the heat energy transmitted by the hydrogen energy module, the hydrogen conversion module, and the gas-electricity conversion module.

[0020] The beneficial effects of the present invention: (1) This application monitors the load and power of the park's power network and heat network. When the load and power are not equal, the corresponding surplus power signal, shortage power signal and heat network low temperature signal are obtained, and the hydrogen energy adjustment amount, electric energy adjustment amount and thermal energy adjustment amount are solved with the lowest energy abnormal signal adjustment cost established by the surplus power signal, shortage power signal and heat network low temperature signal as the goal. Then, based on the hydrogen energy adjustment amount, electric energy adjustment amount and thermal energy adjustment amount, the hydrogen energy, electric energy and thermal energy in the park's energy network are adjusted to eliminate the energy abnormal signal, significantly improve the accuracy of the park's energy scheduling, and greatly improve the utilization rate of the park's energy. The load and power monitoring can also be used to strengthen the renewable energy consumption capacity of the corresponding park's comprehensive energy optimization scheduling; (2) The present application first performs carbon capture to effectively prevent the carbon molecules from escaping and causing impacts on the environment. Then, the carbon molecules are used as raw materials to combine with hydrogen energy to generate natural gas in corresponding equipment to improve the absorption capacity of renewable electricity. When the capture efficiency of the carbon molecules is greater than the conversion efficiency, the carbon molecules are sealed using the storage technology CCUS. In addition to preventing the carbon molecules from escaping, the stored carbon molecules can also be used to maintain the generation efficiency of natural gas and improve the secondary utilization capacity of the hydrogen energy. (3) The present application sets up a corresponding waste heat recovery device in the corresponding park comprehensive energy optimization and scheduling system, which can transmit the by-product waste heat generated in the hydrogen-to-electricity conversion process, the gas-to-electricity conversion process and the gas conversion process to the heat network to adjust the temperature, thereby significantly improving the energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts.

[0022] Figure 1 It is a flow chart of a comprehensive energy optimization scheduling method for a park; Figure 2 This is a structural diagram of a comprehensive energy optimization and scheduling system for a park. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts depict operations (or steps) as sequential processes, many of the operations (or steps) can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operations are completed, but it can also have additional steps not included in the drawings; the process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0025] Embodiment 1: As Figure 1 shown, this embodiment provides a comprehensive energy optimization scheduling method for a park, including the following steps: S1. Obtain an energy anomaly signal based on the surplus power signal, shortage power signal, and low-temperature signal of the heat network monitored by the park energy network; S11. Collect the electrical load power and electric power from the power network in the park energy network, and subtract the electric power from the electrical load power to obtain an electric difference value. If the electric difference value is greater than zero, it is determined that a shortage power signal appears; if the electric difference value is less than zero, it is determined that a surplus power signal appears; if the electric difference value is equal to zero, it is determined that the power network is stable without anomalies; Collect the heat load temperature and heat energy temperature from the heat network in the park energy network, and subtract the heat energy temperature from the heat load temperature to obtain a heat difference value. If the heat difference value is greater than or equal to zero, it is determined that the heat network is stable without anomalies; if the heat difference value is less than zero, it is determined that a low-temperature signal of the heat network appears; S12. Organize the surplus power signal, shortage power signal, and low-temperature signal of the heat network to obtain an energy anomaly signal.

[0026] In this embodiment, in addition to the superior power grid that can purchase electric energy from the outside, the power supply side of the power grid also has a corresponding wind power generation device. The wind power generation device has volatility, and its power generation power changes with time and climate. The superior power grid may experience sudden situations such as power outages due to faults and maintenance outages. In order to accurately analyze the complex characteristics of the power grid for prediction within a time period, the electric power of the power grid can be collected. In addition, the power grid also has an electric load power corresponding to the user side. The electric load power characterizes the change in power demand on the user side. By subtracting the electric load power from the electric power, the mutual relationship between power demand and power supply can be obtained, and the time periods when supply and demand do not match can be determined, that is, surplus power signals and shortage power signals. Secondly, the heat network is essentially to provide a corresponding temperature for the heat load in the park. However, the temperature of the heat network will decrease due to reasons such as time and transmission distance. Generally, the required temperature of the heat load is within a stable range. In order to ensure that the heat energy provided by the heat network can meet the demand of the heat load, the temperature of the heat network needs to be greater than or equal to the required temperature of the heat load. Then, the temperature of the heat network can be subtracted from the required temperature of the heat load to observe whether heating is required, that is, the low-temperature signal of the heat network.

[0027] In one embodiment, before S2, the hydrogen energy regulation amount, electric energy regulation amount, and heat energy regulation amount are also solved with the goal of minimizing the cost of regulating energy anomaly signals. The corresponding objective function is specifically: In the formula, C TOTAL is the cost of regulating energy anomaly signals, C BUY is the cost of purchasing energy from the outside, is the carbon trading cost, C CC is the carbon capture cost, C CS is the carbon sequestration cost, C W is the cost of abandoning wind, C T is the cost of adjusting the flexible electric and heat loads, C OM is the operation and maintenance cost of the carbon capture equipment.

[0028] In this embodiment, if 24 hours a day is used as a complete scheduling cycle, and the hydrogen fuel cell involved in the process of eliminating energy anomaly signals is comprehensively considered, that is, the waste heat recovery in the hydrogen-electric conversion process, the waste heat recovery in the hydrogen methanation, that is, the gas conversion process, the costs and benefits brought by carbon capture, utilization, and sequestration related to carbon molecules, as well as the electric and heat demand responses on the user side, etc., the objective function is constructed.

[0029] The formula for calculating the energy purchase cost C BUY of the external energy purchase is specifically: In the formula, is the unit price of purchasing electric energy in period t, is the electricity quantity purchased in period t, is the unit price of purchasing natural gas in period t, is the natural gas purchased in period t, and T is the dispatching period with a total of 24 periods.

[0030] The load cost formula of the electric - thermal flexible load adjustment cost corresponding to the user - side electric and thermal demand response is specifically:C T = C SF + C TS + C CUT ; In the formula, C T is the total adjustment cost of the electric - thermal flexible load in one day, C SF is the total cost after the translation of the electric - thermal shiftable load, C TS is the total transfer compensation cost after the transfer of the flexible electric load, C CUT is the total curtailment compensation cost.

[0031] Among them, the electric - thermal flexible load is a kind of flexible dispatching resource on the user side, which can actively participate in demand - side response, so as to achieve peak shaving and valley filling and optimize the load curve of the integrated energy system. The electric - thermal flexible load includes at least the electric - thermal shiftable load, transferable charge and electric - thermal curtailment load.

[0032] During demand response, the electric - thermal shiftable load changes the energy supply time according to the plan and shifts among multiple periods; in order to ensure that the entire load is shifted within the same time period, constraint conditions need to be set in the shiftable period. If the shiftable period interval is set as The duration of the electric - thermal shiftable load is t D , and the shift time period is Based on this, the mathematical model corresponding to the electric - thermal shiftable load is specifically: In the formula, C SF is the total cost after the translation of the electric - thermal shiftable load, c sf is the compensation cost coefficient per unit of the electric - thermal shiftable load, is the electric - thermal shiftable load quantity in period t, is the total quantity of the shifted load within the entire dispatching period, is a 0 - 1 Boolean variable indicating whether shift dispatching occurs in period t. When it is 1, it means that there is load shifted to period t, and when it is 0, there is no load shift.

[0033] During the demand - response process, the transferable electric load is more flexible than the shiftable electric load, that is, the transferable charge is within the transferable period interval The electricity consumption in each power consumption period can be flexibly adjusted, but it is necessary to meet the transfer power constraint and ensure that the total electricity load demand remains the same before and after the transfer. At the same time, in order to avoid frequent start-up and stop of equipment caused by the transfer of load in multiple individual periods, it is necessary to constrain the minimum continuous operation time of the transferred electrical load. Based on this, the specific mathematical model corresponding to the transferable charge is as follows: In the formula, is the power for the transfer scheduling of the electrical load in period t, is the minimum value of the electrical load power in period t, is the maximum value of the electrical load power in period t, is the minimum continuous time of the transferable load, is a 0-1 Boolean variable indicating whether the transferable load in period t is scheduled. When it is 1, it means that there is load transfer in period t, and when it is 0, there is no load transfer; Then the total transfer compensation cost C TS after the flexible electrical load transfer is calculated as follows: In the formula, C TS is the total transfer compensation cost after the flexible electrical load transfer, and c ts is the transfer cost coefficient.

[0034] As an effective load regulation means, the electro-thermal load that can be reduced can reduce the load power within the scheduling period according to the scheduling plan. It can not only cope with load fluctuations and emergencies, but also reduce the energy consumption cost for users and promote the sustainable use of energy. According to the actual situation of real energy consumption, in order to ensure the energy consumption comfort of users, it is necessary to constrain the load reduction duration and times. The specific mathematical expression of the electro-thermal load that can be reduced is as follows: In the formula, is the electro-thermal load after participating in the load reduction in period t, is the electro-thermal load before participating in the load reduction in period t, and λ cut is the coefficient for the load to participate in the reduction, is a 0-1 variable indicating whether the load reduction is carried out in period t; The minimum and maximum reduction durations are: In the formula, is the maximum number of load reductions, is the minimum number of load reductions, is a 0-1 variable indicating whether the load reduction was carried out in period t-1; The constraint on the number of reductions is: In the formula, N max is the maximum reduction times of the electric heating load; Then the total reduction compensation cost C CUT Specifically: In the formula, c cut is the reduction cost coefficient.

[0035] The operation and maintenance cost C of the carbon capture equipment OM The corresponding equipment cost calculation formula is specifically: In the formula, α is the equipment operation and maintenance coefficient, β is the equipment stranded cost coefficient, γ is the equipment additional cost coefficient, is the gas power of the micro gas turbine corresponding to the equipment.

[0036] Furthermore, when establishing the objective function, the power balance constraint conditions need to be considered, and the power balance constraint conditions at least include the electric power balance constraint, the thermal power balance constraint, the gas energy balance constraint, and the hydrogen energy balance constraint; The specific electric power balance constraint is: In the formula, is the purchased electricity quantity at time t, is the output power of wind power or renewable energy at time t, is the output power of the battery at time t, is the input power of the battery at time t, is the electric power of the electrolyzer at time t, is the electric output power of the hydrogen fuel cell at time t, is the gas power of the micro gas turbine at time t, is the electric power of the user load at time t.

[0037] The specific thermal power balance constraint is: In the formula, is the thermal output power of the hydrogen fuel cell at time t, is the electric energy heat release power of the methane reactor at time t, is the output thermal power of the micro gas turbine at time t, is the output thermal power of the gas boiler at time t, is the thermal power stored or released by the heat storage tank at time t, is the thermal power of the user load at time t.

[0038] The specific gas energy balance constraint is: In the formula, represents the natural gas purchased in period t, represents the gas power input to the micro gas turbine in period t, represents the gas power input to the gas boiler in period t, represents the natural gas output power of the methane reactor in period t, represents the charging and discharging power of the gas storage tank in period t.

[0039] The specific hydrogen energy balance constraint is as follows: In the formula, represents the hydrogen energy output power of the electrolyzer in period t, represents the hydrogen release power of the hydrogen storage tank in period t, represents the hydrogen energy input power of the methane reactor in period t, represents the hydrogen energy input power of the hydrogen fuel cell in period t, represents the hydrogen charging power of the hydrogen storage tank in period t.

[0040] Finally, considering that the mathematical model corresponding to the objective function is essentially a mixed-integer non-linear model, a commercial solver combining YALMIP and CPLEX in MATLAB is used for solving to obtain the hydrogen energy regulation amount, the electric energy regulation amount, and the heat energy regulation amount.

[0041] S2. When a surplus electricity signal appears, hydrogen energy is obtained by hydrogen decomposition based on the corresponding surplus electric energy; When a shortage electricity signal appears, electric energy is obtained by hydrogen-electricity conversion based on hydrogen energy, and electric energy is obtained by gas-electricity conversion based on the natural gas in the park; When a low-temperature signal of the heat network appears, heat energy is obtained by heating based on the natural gas in the park.

[0042] The corresponding mathematical model of the hydrogen decomposition is specifically as follows: In the formula, η EL is the hydrogen conversion efficiency, is the electric power at time t, is the hydrogen energy output power at time t, is the electric power at time t + 1, is the minimum value of the ramp-up electric power, is the maximum value of the ramp-up electric power, is the maximum value of the electric power, and EL represents hydrogen decomposition.

[0043] The corresponding mathematical model of the hydrogen-electricity conversion is specifically as follows: In the formula, is the hydrogen energy input power at time t, is the electrical output power at time t, is the heat output power at time t, η HFC,e is the hydrogen - electricity conversion efficiency, η HFC,h is the hydrogen - heat conversion efficiency, is the hydrogen energy input power at time t + 1, is the maximum value of the hydrogen energy input power, is the minimum value of the hydrogen energy ramp - up power, is the maximum value of the hydrogen energy ramp - up power, HFC represents hydrogen - electricity conversion.

[0044] In this embodiment, when a surplus electricity signal appears, it proves that the supply of the park's power grid is greater than the demand, and there is surplus electric energy. The surplus electric energy is generally generated by renewable energy devices with unstable power generation, such as wind power generation devices and photovoltaic power generation devices. At this time, in order to absorb the surplus electric energy, hydrogen energy is obtained by hydrogen decomposition based on the corresponding surplus electric energy. Specifically, a proton - exchange membrane electrolyzer for water electrolysis to produce hydrogen PEM electrolyzer EL with zero pollution, compact structure, and high conversion efficiency is used for hydrogen decomposition, and the generated hydrogen is stored in a hydrogen storage tank; when a shortage electricity signal appears, it proves that the demand of the park's power grid is greater than the supply, and electric energy needs to be added to the power grid to maintain the stable operation of the corresponding electrical load. At this time, hydrogen in the hydrogen storage tank can be selected to be injected into a hydrogen fuel cell HFC for hydrogen - electricity conversion to obtain electric energy, or natural gas in the park can be selected to be injected into a micro - gas turbine for gas - electricity conversion to obtain electric energy, and the corresponding battery charge and discharge are coordinated to complete the compensation of the electrical load. The gas - electricity conversion can be achieved by using a micro - gas turbine; when a low - temperature signal of the heat network appears, it proves that the temperature of the park's heat network is not enough to meet the demand of the heat load, and heat energy needs to be supplemented to the heat network to increase the temperature. Natural gas can be selected for heating. Specifically, natural gas is injected into a gas - fired boiler for heating. The relationship between the natural gas consumption of the gas - fired boiler and the output heat power is: In the formula, is the heat power output by the gas - fired boiler GB in the t - time period, η GB is the heat - generating efficiency, is the power of natural gas consumed by the gas - fired boiler GB in the t - time period; it should be noted that the temperature is only an indicator of heat energy and does not directly represent heat energy.

[0045] In one embodiment, in the S2, carbon molecules are also generated during the gas - electricity conversion process and the heating process. Based on the carbon molecules and hydrogen energy, natural gas is obtained through gas conversion; The corresponding mathematical model of the gas conversion is specifically: In the formula, is the hydrogen energy input power at time t, is the natural gas output power at time t, η MR is the gas conversion efficiency, is the maximum value of the hydrogen energy input power, is the minimum value of the hydrogen energy ramp power, is the hydrogen energy input power at time t + 1, is the maximum value of the hydrogen energy ramp power, MR represents gas conversion.

[0046] In this embodiment, the carbon molecule is essentially carbon dioxide. Since carbon dioxide is a gas and is prone to dispersion, it is necessary to collect it based on corresponding devices using post-combustion capture technologies such as chemical solvents and compression separation. Specifically, the devices corresponding to the gas-electricity conversion process and the heating process can be transformed based on the carbon capture and storage technology CCUS. This transformation causes a change in the operating environment of the device's mechanical structure components, increasing the additional energy consumption as a fixed value. Coupled with the fact that carbon capture itself has a certain amount of energy consumption, the transformed device will increase the fixed additional energy consumption and carbon capture energy consumption. Taking the transformation of a micro gas turbine as an example, the increased energy consumption corresponds to the following mathematical expression: In the formula, is the total increased energy consumption at time t, is the increased fixed energy consumption at time t, is the carbon capture energy consumption at time t, λ e is the electrical energy consumed per unit of carbon dioxide in the carbon capture process, is the total amount of carbon dioxide captured at time t, α MT is the carbon emission intensity, η t is the carbon capture efficiency at time t, is the electric power of the transformed micro gas turbine at time t; Then the cost of the carbon capture process is: In the formula, C CC is the carbon capture cost within a cycle with a 24-hour day as a cycle, is the on-grid electricity price at time t.

[0047] Next, the captured carbon molecules are injected into the methane reactor for gas conversion to achieve the recycling of carbon. Given that there is a situation where the gas conversion efficiency is lower than the carbon capture efficiency, that is, there is an excess of carbon dioxide, the remaining carbon dioxide can be sequestered using carbon sequestration technology and stored underground or in other permanent storage repositories to prevent carbon dioxide from entering the atmosphere. The cost of the carbon sequestration is specifically: In the formula, C CS is the total cost of carbon sequestration within a cycle, ccs is the unit carbon molecule sequestration cost for carbon sequestration within one cycle, and one cycle is 24 hours. is the volume of carbon dioxide captured at time t. is the volume of carbon dioxide consumed for carbon utilization at time t.

[0048] In addition, carbon emissions are involved in the carbon capture process, that is, carbon molecules that can neither be captured as raw materials for natural gas production nor sequestered; currently, carbon quotas are mainly allocated in the form of free carbon quotas. In this embodiment, the benchmark allocation method is used to formulate free carbon emission rights quotas. The benchmark allocation method takes the carbon emissions of different industries as the benchmark and formulates specific free carbon quotas for each industry. The main carbon emission sources in this embodiment are purchasing electricity from the superior power grid, micro gas turbines, and gas boilers. Then, the calculation formula for the carbon quota is: In the formula, is the total carbon quota at time t. is the carbon quota for purchasing electricity from the superior power grid at time t. is the carbon quota for the operation of the gas boiler at time t. is the carbon quota for the operation of the micro gas turbine at time t, θ e is the carbon emission rights quota per unit of electricity, θ h is the carbon emission rights quota per unit of heat. is the conversion coefficient for converting electricity into heat, Q CA,total is the total carbon quota in one day; Considering that the carbon capture process will reduce the carbon emissions, the mathematical expression for the actual carbon emissions is: In the formula, is the actual carbon emissions at time t, α MT is the carbon emission intensity, η t is the efficiency of carbon capture at time t, N CE,total is the total actual carbon emissions in one day at time t; Then, the mathematical expression for the carbon emissions participating in carbon trading is: N = N CE,toal - N CA,total - N RW,total ; In the formula, N is the value of the carbon emissions participating in carbon trading, N CE,toal is the actual carbon emissions, N CA,total is the carbon emissions reduced through carbon quotas, N RW,total is the carbon emissions reduced through carbon capture; Secondly, in this embodiment, a reward and punishment type stepped carbon trading mechanism is adopted, and the corresponding constraint conditions are: In the formula, is the stepped carbon trading cost, B is the base price of carbon trading, l is the carbon emission range value, and μ is the price growth rate.

[0049] In one embodiment, in S2, the hydrogen-electric conversion process, the gas-electric conversion process, and the gas conversion process also generate waste heat. The waste heat is recovered based on a waste heat recovery device, and the heat network in the park energy network is trimmed based on the waste heat.

[0050] In this embodiment, the hydrogen-electric conversion process is generally the working process of a hydrogen fuel cell, and the sum of its electric conversion rate and heat conversion rate is generally regarded as a constant; the gas-electric conversion process is generally the working process of a micro gas turbine. The micro gas turbine can generate electric energy and heat energy using natural gas. The relationship between the electric and heat powers of the micro gas turbine at time t is: In the formula, is the output heat power of the micro gas turbine at time t, is the heat generation efficiency of the micro gas turbine, is the heat dissipation loss rate of the micro gas turbine, η h is the heating coefficient, is the output electric power of the micro gas turbine at time t; Then the relationship between the natural gas consumption of the micro gas turbine and the output electric power is: In the formula, is the volume of natural gas consumed by the micro gas turbine at time t; The gas conversion process is generally the working process of a methane reactor, which converts carbon molecules and hydrogen into natural gas. First, clarify the expression for the volume of carbon dioxide consumed in the hydrogen methanation process at time t: In the formula, is the volume of carbon dioxide consumed in the hydrogen methanation process at time t, is the density of methane, λ is the efficiency of carbon dioxide conversion into methane, ω is the conversion coefficient of carbon dioxide and methane, is the higher heating value of natural gas, taking 11 kw·h / m 3 , is the output natural gas power of the methane reactor at time t; It can be deduced from the carbon dioxide expression that heat energy is generated during the hydrogen methanation process. To achieve multi-level utilization of energy, the heat energy generated during the hydrogen methanation process is recovered. Then the expression for the heat recovered during the methanation process at time t is: Wherein, is the total recovered heat during the hydrogen methanation process in period t, H MR is the heat released per unit of electric energy in the hydrogen methanation process, V EL is the volume of hydrogen gas produced per unit of electric energy, is the higher heating value of natural gas, is the hydrogen energy input power of the methane reactor in period t; Finally, based on the corresponding waste heat recovery device, the thermal energy is recovered and stored in the heat storage tank of the park's heat network.

[0051] S3. Based on the hydrogen energy, electric energy and thermal energy, trim the park's energy network to eliminate energy anomaly signals; Specifically, based on the hydrogen decomposition process, collect the hydrogen energy change coefficient, and compare the hydrogen energy change coefficient with the hydrogen-electricity conversion threshold. When the hydrogen energy change coefficient is equal to the hydrogen-electricity conversion threshold, mark the corresponding energy anomaly signal as a normal signal. When the hydrogen energy change coefficient is less than or greater than the hydrogen-electricity conversion threshold, the corresponding energy anomaly signal remains unchanged; Based on the hydrogen-electricity conversion process and the gas-electricity conversion process, collect the electric energy change coefficient, and compare the electric energy change coefficient with the electric energy value of the power shortage signal. If the electric energy change coefficient is equal to the electric energy value, mark the corresponding energy anomaly signal as a normal signal. If the electric energy change coefficient is greater than or less than the electric energy value, the corresponding energy anomaly signal remains unchanged; Based on the heating process, collect the thermal energy change temperature, and compare the thermal energy change temperature with the temperature value of the low-temperature signal of the heat network. If the thermal energy change temperature is greater than or equal to the temperature value, mark the corresponding energy anomaly signal as a normal signal. If the thermal energy change temperature is less than the temperature value, the corresponding energy anomaly signal remains unchanged.

[0052] In this embodiment, the process of eliminating the energy anomaly signal is essentially a process of adjusting the energy adjustment amount required by the energy network of the corresponding park, that is, the process of supplementing the energy required by the park energy network. Therefore, the hydrogen energy change coefficient is collected based on the hydrogen decomposition process, that is, the hydrogen gas volume corresponding to the generated hydrogen energy. The hydrogen energy change coefficient is compared with the hydrogen-electricity conversion threshold. The hydrogen-electricity conversion threshold is essentially the hydrogen energy adjustment amount obtained by solving the problem with the lowest energy anomaly signal adjustment cost. Therefore, when the hydrogen energy change coefficient is equal to the hydrogen-electricity conversion threshold, it proves that the required hydrogen energy of the corresponding park energy network has been supplemented. Secondly, based on the hydrogen-electricity conversion process and the gas-electricity conversion process, the electric energy change coefficient is collected, that is, the electric energy value corresponding to the generated electric energy. The electric energy change coefficient is compared with the electric energy value of the shortage electric signal. When the electric energy change coefficient is equal to the electric energy value, it proves that the shortage electric energy of the corresponding park energy network has been supplemented. It should be noted that when there is surplus electric energy in the park energy network, it will be directly converted into hydrogen energy or abandoned by means of disconnecting wind power devices, photovoltaic devices, etc., without special adjustment. In addition, based on the heating process, the heat energy change temperature is collected, that is, the heat energy in the energy conversion process is converted into temperature. The heat energy change temperature is compared with the temperature value of the low-temperature heat network signal. When the heat energy change temperature is greater than or equal to the temperature value, it proves that the required heat energy of the corresponding park energy network has been supplemented. Based on this, the energy anomaly signal is eliminated and the stable operation of the corresponding park energy network is maintained.

[0053] On the other hand, as Figure 2 shown, another technical solution provided in the embodiment of the present invention is a comprehensive energy optimization scheduling system for a park, including: a hydrogen energy module, a hydrogen conversion module, a gas-electricity conversion module, a gas-heat conversion module, and a waste heat module; The hydrogen energy module decomposes hydrogen based on the surplus electric signal to obtain and store hydrogen energy, transmits the hydrogen energy to the hydrogen conversion module, and performs hydrogen-electricity conversion based on the shortage electric signal and the stored hydrogen to obtain electric energy and heat energy. The electric energy is transmitted to the park power network, and the heat energy is transmitted to the waste heat module; The hydrogen conversion module performs gas conversion based on hydrogen energy to obtain natural gas and heat energy, transmits the natural gas to the park gas network, and transmits the heat energy to the waste heat module; The gas-electricity conversion module performs gas-electricity conversion based on the natural gas in the park gas network and the shortage electric signal to obtain electric energy and heat energy. The electric energy is transmitted to the park power network, and the heat energy is transmitted to the waste heat module; The gas-heat conversion module performs heating based on the natural gas in the park gas network and the low-temperature heat network signal to obtain heat energy, and transmits the heat energy to the park heat network; The waste heat module adjusts the temperature of the park heat network based on the heat energy transmitted by the hydrogen energy module, the hydrogen conversion module, and the gas-electricity conversion module.

[0054] In this embodiment, the hydrogen energy module includes an electrolyzer, a hydrogen storage tank, and a hydrogen fuel cell. The electric energy input end of the electrolyzer is electrically connected to the park power grid. The first hydrogen energy output end of the electrolyzer is connected to the hydrogen energy input end of the hydrogen conversion module. The second hydrogen energy output end of the electrolyzer is connected to the hydrogen energy input end of the hydrogen storage tank. The hydrogen energy output end of the hydrogen storage tank is electrically connected to the hydrogen energy input end of the hydrogen fuel cell. The electric energy output end of the hydrogen fuel cell is electrically connected to the park power grid. The waste heat output end of the hydrogen fuel cell is connected to the first input end of the waste heat module.

[0055] The hydrogen conversion module includes a methane reactor and a carbon capture device. The hydrogen energy input end of the methane reactor is connected to the first hydrogen energy output end of the electrolyzer in the hydrogen energy module. The natural gas output end of the methane reactor is connected to the park natural gas network. The waste heat output end of the methane reactor is connected to the second input end of the waste heat module. The carbon flow input end of the methane reactor is connected to the carbon flow output end of the carbon capture device. The capture end of the carbon capture device is connected to the carbon emission end of the gas-electricity conversion module; in addition, the capture end of the carbon capture device can also be connected to the carbon emission end of the gas-thermal conversion module.

[0056] The gas-electricity conversion module includes a micro gas turbine. The electric energy output end of the micro gas turbine is electrically connected to the park power grid. The carbon emission end of the micro gas turbine is connected to the capture end of the carbon capture device in the hydrogen conversion module. The heat energy output end of the micro gas turbine is connected to the park heat network. The natural gas input end of the micro gas turbine is connected to the park natural gas network; in addition, if the micro gas turbine is not used as the main heat energy device, the heat energy output end of the micro gas turbine can also be connected to the heat energy input end of the waste heat module.

[0057] The gas-thermal conversion module includes a gas boiler. The natural gas input end of the gas boiler is connected to the park natural gas network. The heat energy output end of the gas boiler is connected to the park heat network.

[0058] The waste heat module is a waste heat recovery device. The heat energy output end of the waste heat recovery device is connected to the park heat network. The first input end of the waste heat recovery device is connected to the waste heat output end of the hydrogen fuel cell in the hydrogen energy module. The second input end of the waste heat recovery device is connected to the waste heat output end of the methane reactor in the hydrogen conversion module.

[0059] This embodiment at least has the following substantial effects: (1) This application monitors the load and power of the park's power network and heat network. When the load and power are not equal, the corresponding surplus power signal, shortage power signal and heat network low temperature signal are obtained, and the hydrogen energy adjustment amount, electric energy adjustment amount and thermal energy adjustment amount are solved with the lowest energy abnormal signal adjustment cost established by the surplus power signal, shortage power signal and heat network low temperature signal as the goal. Then, based on the hydrogen energy adjustment amount, electric energy adjustment amount and thermal energy adjustment amount, the hydrogen energy, electric energy and thermal energy in the park's energy network are adjusted to eliminate the energy abnormal signal, significantly improve the accuracy of the park's energy scheduling, and greatly improve the utilization rate of the park's energy. The load and power monitoring can also be used to strengthen the renewable energy consumption capacity of the corresponding park's comprehensive energy optimization scheduling; (2) The present application first performs carbon capture to effectively prevent the carbon molecules from escaping and causing impacts on the environment. Then, the carbon molecules are used as raw materials to combine with hydrogen energy to generate natural gas in corresponding equipment to improve the absorption capacity of renewable electricity. When the capture efficiency of the carbon molecules is greater than the conversion efficiency, the carbon molecules are sealed using the storage technology CCUS. In addition to preventing the carbon molecules from escaping, the stored carbon molecules can also be used to maintain the generation efficiency of natural gas and improve the secondary utilization capacity of the hydrogen energy. (3) The present application sets up a corresponding waste heat recovery device in the corresponding park comprehensive energy optimization and scheduling system, which can transmit the by-product waste heat generated in the hydrogen-to-electricity conversion process, the gas-to-electricity conversion process and the gas conversion process to the heat network to adjust the temperature, thereby significantly improving the energy utilization rate.

[0060] The above specific embodiments are preferred embodiments of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the present specific embodiments. All equivalent changes made in accordance with the shape, structure, and method of the present invention are within the protection scope of the present invention.

Claims

1. A comprehensive energy optimization scheduling method for a park, characterized in that: The following steps are involved: S1. Based on the park energy network, monitor the surplus power signal, the shortage power signal, and the low temperature signal of the heat network to obtain the energy abnormality signal; S2. When a surplus electric signal appears, hydrogen is decomposed based on the corresponding surplus electric energy to obtain hydrogen energy; When the power shortage signal appears, hydrogen-to-electricity conversion is performed based on hydrogen energy to obtain electric energy, and gas-to-electricity conversion is performed based on the park's natural gas to obtain electric energy; When a low temperature signal appears in the heating network, heating is performed based on the natural gas in the park to obtain thermal energy; S3. Repair the park energy network based on the hydrogen energy, electric energy and thermal energy to eliminate abnormal energy signals.

2. A park comprehensive energy optimization scheduling method according to claim 1, characterized in that: In S1, the specific process of obtaining energy abnormality signals based on monitoring surplus power signals, shortage power signals, and low temperature signals of the heat network in the park energy network is as follows: S11, based on the power network in the park energy network, collect the electric load power and the electric power, and make a difference between the electric load power and the electric power to obtain an electric difference value, if the electric difference value is greater than zero, it is determined that there is a lack of electric signal, if the electric difference value is less than zero, it is determined that there is a surplus electric signal, if the electric difference value is equal to zero, it is determined that the power network is stable and there is no abnormality; Based on the heat network in the park energy network, the heat load temperature and the heat energy temperature are collected, and the heat load temperature and the heat energy temperature are subtracted to obtain a heat difference value. If the heat difference value is greater than or equal to zero, it is determined that the heat network is stable and there is no abnormality. If the heat difference value is less than zero, it is determined that a low temperature signal of the heat network occurs; S12, arranging the surplus electric signal, the shortage electric signal and the heat network low temperature signal to obtain an energy abnormality signal.

3. A park comprehensive energy optimization scheduling method according to claim 1, characterized in that: Before S2, the hydrogen energy regulation amount, electric energy regulation amount and thermal energy regulation amount are solved with the lowest energy abnormal signal regulation cost as the goal, and the corresponding objective function is specifically: C TOTAL =min(C BUY +C CO2 +C CC +C CS +C W +C T +C OM ); In the formula, C TOTAL is the energy abnormal signal adjustment cost, C BUY is the external energy purchase cost, C CO2 is the carbon trading cost, C CC is the cost of carbon capture, C CS is the carbon sequestration cost, C W is the wind curtailment cost, C T is the cost of adjusting the electric heating flexible load, C OM Operating and maintenance costs for carbon capture equipment.

4. A park comprehensive energy optimization scheduling method according to claim 1, characterized in that: In S2, the corresponding mathematical model of hydrogen decomposition is specifically: Where η EL is the hydrogen conversion efficiency, is the electric power at time t, is the hydrogen energy output power at time t, is the electric power at time t+1, is the minimum climbing electric power, is the maximum value of the climbing electric power, is the maximum value of electric power, EL represents hydrogen decomposition.

5. The method for optimizing and scheduling comprehensive energy in a park according to claim 1, characterized in that: In S2, the corresponding mathematical model of hydrogen-to-electricity conversion is specifically: In the formula, is the hydrogen energy input power at time t, is the electrical output power at time t, is the thermal output power at time t, η HFC,e is the hydrogen-to-electricity conversion efficiency, η HFC,h is the hydrogen heat conversion efficiency, is the hydrogen energy input power at time t+1, is the maximum value of hydrogen energy input power, is the minimum value of hydrogen energy climbing power, It is the maximum value of hydrogen energy climbing power, and HFC stands for hydrogen-to-electricity conversion.

6. A park comprehensive energy optimization scheduling method according to claim 1, characterized in that: In S2, the gas-to-electricity conversion process and the heating process also generate carbon molecules, and gas conversion is performed based on the carbon molecules and hydrogen energy to obtain natural gas.

7. A park comprehensive energy optimization scheduling method according to claim 6, characterized in that: The corresponding mathematical model of the gas conversion is specifically: In the formula, is the hydrogen energy input power in period t, is the natural gas output power in period t, η MR is the gas conversion efficiency, is the maximum value of hydrogen energy input power, is the minimum value of hydrogen energy climbing power, is the hydrogen energy input power in the period t+1, is the maximum value of hydrogen energy climbing power, and MR represents gas conversion.

8. A park comprehensive energy optimization scheduling method according to claim 6, characterized in that: In S2, the hydrogen-to-electricity conversion process, the gas-to-electricity conversion process and the gas conversion process also generate waste heat, which is recovered by a waste heat recovery device, and the heat network in the park energy network is repaired based on the waste heat.

9. A park comprehensive energy optimization scheduling method according to claim 1, characterized in that: In S3, the specific process of repairing the park energy network and eliminating energy abnormality signals based on the hydrogen energy, electric energy and thermal energy is as follows: Based on the hydrogen decomposition process, the hydrogen energy variation coefficient is collected, and the hydrogen energy variation coefficient is compared with the hydrogen-to-electricity conversion threshold. When the hydrogen energy variation coefficient is equal to the hydrogen-to-electricity conversion threshold, the corresponding energy abnormality signal is marked as a normal signal. When the hydrogen energy variation coefficient is less than or greater than the hydrogen-to-electricity conversion threshold, the corresponding energy abnormality signal remains unchanged. Based on the collection of electric energy variation coefficients during the hydrogen-electricity conversion process and the gas-electricity conversion process, the electric energy variation coefficients are compared with the electric energy values ​​of the power-deficient signal. If the electric energy variation coefficient is equal to the electric energy value, the corresponding energy abnormality signal is marked as a normal signal. If the electric energy variation coefficient is greater than or less than the electric energy value, the corresponding energy abnormality signal remains unchanged. The thermal energy change temperature is collected based on the heating process, and compared with the temperature value of the low temperature signal of the heating network. If the thermal energy change temperature is greater than or equal to the temperature value, the corresponding energy abnormality signal is marked as a normal signal. If the thermal energy change temperature is less than the temperature value, the corresponding energy abnormality signal remains unchanged.

10. A park comprehensive energy optimization scheduling system, applicable to a park comprehensive energy optimization scheduling method as claimed in any one of claims 1 to 9, characterized in that: Including: hydrogen energy module, hydrogen conversion module, gas-electricity conversion module, gas-heat conversion module, waste heat module; The hydrogen energy module decomposes hydrogen based on the surplus electrical signal to obtain and store hydrogen energy, transmits the hydrogen energy to the hydrogen conversion module, performs hydrogen-to-electricity conversion based on the scarce electrical signal combined with the stored hydrogen to obtain electrical energy and thermal energy, transmits the electrical energy to the park power network, and transmits the thermal energy to the waste heat module; The hydrogen conversion module performs gas conversion based on hydrogen energy to obtain natural gas and thermal energy, transmits the natural gas to the park gas network, and transmits the thermal energy to the waste heat module; The gas-to-electricity conversion module performs gas-to-electricity conversion based on the natural gas in the park gas network and the scarce electric signal to obtain electric energy and thermal energy, transmits the electric energy to the park power network, and transmits the thermal energy to the waste heat module; The gas-heat conversion module obtains heat energy by heating based on the natural gas in the park gas network and the low-temperature signal of the heat network, and transmits the heat energy to the park heat network; The waste heat module adjusts the temperature of the park heating network based on the heat energy transmitted by the hydrogen energy module, the hydrogen conversion module and the gas-to-electricity conversion module.

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