An operation scheduling method, device and medium for a hydrogen-containing island microgrid system

Abstract

The present invention discloses an operation scheduling method, device, and medium for a hydrogen-containing island microgrid system. The method comprises: first obtaining the operation curve and operation characteristic parameters of the hydrogen-containing island microgrid system, then establishing a multi-objective optimization operation model for the system under multiple time scales and multiple operating conditions based on operation limit constraints, performing an operating condition judgment based on the current operating state of the system, adjusting the operation limit constraints, and then inputting the operation curve and operation characteristic parameters into the model for processing and outputting the power scheduling amount of the system, thereby performing operation scheduling. The present invention can schedule the operation of the hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions while ensuring system power balance and taking into account the life of the energy storage battery. It can also be used to adjust the system configuration scheme and operation mode, thereby improving the rationality of the system implementation plan.

Description

Technical Field

[0001] The present invention relates to a method for dispatching an operation of a power grid system, and particularly to a method, device, and medium for dispatching an operation of a hydrogen-containing island microgrid system. Background Art

[0002] A hydrogen-containing island microgrid system is an off-grid operating system powered by renewable energy sources such as wind power and photovoltaics. Within the hydrogen-containing island microgrid system, a hydrogen energy storage device consisting of an electrolyzer hydrogen production load, a hydrogen storage tank, and a hydrogen fuel cell can produce and store hydrogen while working in conjunction with the energy storage battery to ensure system power balance. Incorporating an adjustable electrolyzer hydrogen production load into the island microgrid system can effectively increase the off-grid system's absorption rate of uncertain renewable power such as wind and solar power, and improve the power supply reliability within the off-grid system. However, there is currently a lack of multi-timescale, multi-operating-condition operation scheduling methods for hydrogen-containing island microgrid systems. Operational scheduling for hydrogen-containing island microgrid systems is limited to a single timescale and single operating condition, which is not conducive to exploring the advantages of hydrogen-containing island microgrid systems in long-term and multi-operating-condition scenarios. Summary of the Invention

[0003] To address the problems in the background art, the present invention provides an operation scheduling method, device, and medium for a hydrogen-containing island microgrid system. The present invention can address the technical problem in the related art of lacking a multi-timescale, multi-operating-condition operation scheduling method for hydrogen-containing island microgrid systems.

[0004] The technical solution adopted in the present invention is:

[0005] 1. An operation and scheduling method for a hydrogen-containing island microgrid system:

[0006] Step 1) Obtain the operating curve and operating characteristic parameters of the hydrogen island microgrid system.

[0007] Step 2) Establish a multi-objective optimization operation model for the hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions based on operation constraints. The operation constraints include power balance and equipment operation constraints and the operation constraints of the hydrogen energy storage device to independently supply the base load.

[0008] Step 3) The operating condition is judged based on the current operating status of the hydrogen island microgrid system, thereby adjusting the operating constraints. The operating curve and operating characteristic parameters of the hydrogen island microgrid system are then input into the multi-objective optimization operation model for processing. After processing, the multi-objective optimization operation model outputs the power dispatch amount of the hydrogen island microgrid system, and then the operation of the hydrogen island microgrid system is dispatched.

[0009] In step 1), the hydrogen-containing island microgrid system includes power generation equipment, system lines, base loads, hydrogen energy storage devices, and energy storage batteries. The hydrogen energy storage devices include electrolyzer hydrogen production loads, hydrogen storage tanks, and hydrogen fuel cells. The power generation equipment transmits electricity to the base loads, the electrolyzer hydrogen production loads, and the energy storage batteries of the hydrogen energy storage devices through the system lines. The hydrogen energy generated by the electrolyzer hydrogen production loads is stored in the hydrogen storage tanks, which are then transported externally or to the hydrogen fuel cells for power generation. The hydrogen energy storage devices and energy storage batteries regulate the volatility differences between the power generation equipment and the base loads by charging and discharging the system lines. The base loads are specifically important loads within the system that maintain lighting, heating and cooling, and operation scheduling.

[0010] In the step 1), the operating curve of the hydrogen-containing island microgrid system includes the power output curve of the power generation equipment and the power consumption curve of the base load; the operating characteristic parameters include the power output curve of the unit capacity power generation equipment, the maximum charge and discharge power of the energy storage battery, the upper and lower limits of the state of charge of the energy storage battery, the power consumption curve of the base load at multiple time scales, the power adjustable range of the hydrogen production load of the electrolyzer of the hydrogen energy storage device, the maximum discharge power of the hydrogen fuel cell, and the upper and lower limits of the hydrogen storage ratio of the hydrogen storage tank.

[0011] In step 2), the multi-objective optimization operation model of the hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions is as follows:

[0012] min F run =∑ T t=1 [ c E run P E t + c Batt run P Batt t + c FC run P FC t + c EC run ( N run t P EC t + N stop t P EC stop )]

[0013] min F num =∑ T t=2 max[sgn( P Batt t · P Batt t-1 ),0]

[0014] min F wave =∑ T t=2 min[max(| P Batt t |)]

[0015] in, F run is the total operating cost of the hydrogen island microgrid system; T is the length of the time scale, in h; c E run 、 c Batt run 、 c FC run and c EC run are the unit dispatch costs of power generation equipment, energy storage batteries, hydrogen energy storage devices, and electrolyzer hydrogen production loads respectively; P E t 、 P Batt t and P FC t The power values ​​input into or obtained from the hydrogen island microgrid system for the power generation equipment, energy storage battery and hydrogen energy storage device during period t are respectively: P Batt t-1 Input the power value of the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system to the energy storage battery during the t-1 period; P EC t is the input power of a single electrolyzer operating in normal state during the hydrogen production load of the electrolyzer during period t; P EC stop The input power of a single electrolytic cell when it is in shutdown and heat preservation state; N runt and N stop t are the number of electrolyzers in the electrolyzer hydrogen production load working in normal state and shutdown and heat preservation state during period t respectively; F num and F wave are the total charge and discharge times and the total state of charge fluctuation range of the energy storage battery in the hydrogen island microgrid system, respectively; sgn( ) is the judgment symbol, which outputs 1 when the input is positive, 0 when the input is 0, and -1 when the input is negative.

[0016] The power dispatching capacity of the hydrogen-containing island microgrid system includes the power values ​​input into the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system by the power generation equipment, energy storage batteries and hydrogen energy storage devices during period t, as well as the input power of a single electrolyzer in the electrolyzer hydrogen production load working in a normal state during period t; the operation of the hydrogen-containing island microgrid system is dispatched according to the power dispatching capacity, and the excess power of the power generation equipment is abandoned during the dispatching process.

[0017] During the operation of the system, the operating cost includes the scheduling cost caused by the power changes of power generation equipment, energy storage batteries, hydrogen energy storage devices, and adjustable hydrogen production loads; the number of charge and discharge times of the energy storage battery is judged by the positive and negative changes in the output power of the energy storage battery at nearby moments, and the number of charge and discharge times of the energy storage battery within a certain period of time is statistically obtained; the fluctuation range of the state of charge of the energy storage battery is judged by the maximum and minimum values ​​of the output power of the energy storage battery within a period of time; the goal of the multi-objective optimization operation model is to minimize the overall operating cost of the system, minimize the number of charge and discharge times of the energy storage battery, and minimize the fluctuation range of the state of charge of the energy storage battery. The cost can be specifically measured by power value.

[0018] In step 2), the power balance and equipment operation constraints are as follows:

[0019] P E t + P Batt t + P FC t = P EL t + P Base t

[0020] 0≤ P E t ≤ PEmax t

[0021] P Batt min ≤ P Batt t ≤ P Batt max

[0022] S Batt min ≤ S Batt t ≤ S Batt max

[0023] P Batt t =0, S Batt max ≤ S Batt t or S Batt t ≤ S Batt min

[0024] 0≤ P FC t ≤ βη e-FC V FC t

[0025] S HT min ≤ S HT t ≤ S HT max

[0026] P FC t =0, S HT max ≤ S HT t or S HTt ≤ S HT min

[0027] P EL t = N run t P EC t + N stop t P EC stop

[0028] P EC min ≤ P EC t ≤ P EC max

[0029] P sys E = C E · P unit E

[0030] in, P E t and P Emax t are the power value and its upper limit inputted into or obtained from the hydrogen island microgrid system by the power generation equipment during period t; P Batt t 、 P Batt max and P Batt min are the power value and its upper and lower limits input by the energy storage battery into the hydrogen island microgrid system or obtained from the hydrogen island microgrid system during period t; P FC t Input the power value of the hydrogen island microgrid system for the hydrogen energy storage device during period t; P EL t is the overall input power of the electrolyzer array in the electrolyzer hydrogen production load during period t;P Base t is the power consumption of the base load that needs to be supplied during period t; P EC t 、 P EC max and P EC min are the input power and upper and lower limits of a single electrolyzer operating in a normal state during the electrolyzer hydrogen production load in period t; S Batt t 、 S Batt max and S Batt min are the state of charge of the energy storage battery and its upper and lower limits in period t respectively; β is the hydrogen-to-electricity conversion coefficient of hydrogen; η e-FC is the output electrical efficiency of the hydrogen fuel cell; V FC t is the hydrogen consumption of the hydrogen fuel cell during period t; S HT t 、 S HT max and S HT min are the hydrogen storage ratio and its upper and lower limits of the hydrogen storage tank in period t respectively; N run t and N stop t are the number of electrolyzers in the electrolyzer hydrogen production load working in normal state and shutdown and heat preservation state during period t respectively; P EC stop The input power of a single electrolytic cell when it is in shutdown and heat preservation state; P sys E It is the power output curve of the power generation equipment; C E Configure capacity for power generation equipment; P unit E It is the power output curve of unit capacity power generation equipment.

[0031] The power consumption curve of the base load of the hydrogen-containing island microgrid system is the power consumption of the base load that needs to be guaranteed in each time period; the maximum charge and discharge power of the energy storage battery includes the upper and lower limits of the power value input by the energy storage battery to the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system in time period t; the power consumption curve of the base load in multiple time scales is the power consumption of the base load that needs to be guaranteed in the total time scale; the upper limit of the power adjustable range of the hydrogen production load of the electrolyzer of the hydrogen energy storage device is the power value when all electrolyzers are operating at the upper limit of the input power, and the lower limit of the power adjustable range is the power value when all electrolyzers are operating in the shutdown and insulation state; the maximum discharge power of the hydrogen fuel cell is the discharge power of the maximum volume of hydrogen that can be input into the hydrogen fuel cell by the hydrogen storage tank converted into electrical energy.

[0032] In step 2), the operating constraints for the hydrogen energy storage device to independently supply the base load are as follows:

[0033] P Base t · T Base limit ≤( S Batt t - S Batt min )· E Batt N

[0034] in, P Base t is the power consumption of the base load that needs to be supplied during period t; T Base limit The duration for which the base load needs to be guaranteed; S Batt t and S Batt min are the state of charge of the energy storage battery and its lower limit in period t respectively; E Batt N is the rated capacity of the energy storage battery.

[0035] There are important loads in the system to maintain the normal operation of the system as a whole. The configured energy storage system should ensure that its power can supply the basic load for a period of time, allowing the system to have enough time to deal with various faults.

[0036] In the step 3), the operating condition is judged according to the current operating state of the hydrogen-containing island microgrid system, and the operating conditions of the hydrogen-containing island microgrid system include normal operating conditions, machine tripping conditions, load shedding conditions and energy storage battery short-term fault conditions; when in normal operating conditions, the operating restriction constraint is not adjusted; when in the machine tripping condition, the upper limit of the power value input by the power generation equipment into the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system in the operating restriction constraint is reduced to a preset first power threshold; when in the load shedding condition, the power consumption of the basic load that needs to be guaranteed in the operating restriction constraint is reduced to a preset second power threshold; when in the energy storage battery short-term fault condition, the upper limit of the charge and discharge of the energy storage battery in the operating restriction constraint is reduced to a preset third power threshold, and the lower limit of the charge and discharge of the energy storage battery in the operating restriction constraint is increased to a preset fourth power threshold.

[0037] 2. An operation and dispatching device for a hydrogen-containing island microgrid system:

[0038] The data acquisition module is used to obtain the operating curve and operating characteristic parameters of the hydrogen-containing island microgrid system.

[0039] The model building module is used to establish a multi-objective optimization operation model of a hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions based on operation restriction constraints.

[0040] The constraint adjustment module is used to make operating condition judgment according to the current operating status of the hydrogen island microgrid system, thereby adjusting the operating limit constraints.

[0041] The operation scheduling module is used to input the operation curve and operation characteristic parameters of the hydrogen-containing island microgrid system into the multi-objective optimization operation model for processing. After processing, the multi-objective optimization operation model outputs the power scheduling amount of the hydrogen-containing island microgrid system, and then performs operation scheduling on the hydrogen-containing island microgrid system.

[0042] 3. An electronic device comprises: a memory and a processor coupled to each other, wherein the memory stores program data, and the processor calls the program data to execute the method as described above.

[0043] 4. A computer-readable storage medium having program data stored thereon, wherein the program data implements the method described above when executed by a processor.

[0044] The beneficial effects of the present invention are:

[0045] The present invention obtains the operating mode of the hydrogen-containing island microgrid system by obtaining the operating curve and operating characteristic parameters of the hydrogen-containing island microgrid system, and then designs an operating method to ensure the power balance of the system and take into account the life of the energy storage battery. It takes into account the operating cost of the system and the number of charge and discharge times and charge and discharge depth of the energy storage battery. The operation of the hydrogen-containing island microgrid system can be scheduled under multiple time scales and multiple working conditions, and based on the operating results, the performance parameters of the system under long time scales and multiple working conditions are obtained, and then the configuration plan and operating mode of the system are adjusted to improve the rationality of the system implementation plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a flow chart of the method of the present invention;

[0047] Figure 2 is a schematic diagram showing the composition structure of a hydrogen-containing island microgrid system according to an exemplary embodiment;

[0048] Figure 3 is an operating characteristic curve diagram of each device in a hydrogen-containing island microgrid system according to an exemplary embodiment, wherein Figure 3 (a) is the power output curve of unit capacity wind power generation equipment in 8760 hours throughout the year. Figure 3 (b) is the power output curve of unit capacity wind power generation equipment in a single calendar day. Figure 3 (c) is the power output curve of the photovoltaic power generation equipment with unit capacity for 8760 hours in a year. Figure 3 (d) is the power output curve of the unit capacity photovoltaic power generation equipment in a single calendar day. Figure 3 (e) is the electricity consumption curve of base load in 8760 hours throughout the year. Figure 3 (f) is the electricity consumption curve of base load in a single calendar day;

[0049] Figure 4 is a diagram showing the operation results of a hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions according to an exemplary embodiment, wherein: Figure 4 (a) is the power supply or power consumption diagram of the hydrogen island microgrid system under normal operating conditions on a single calendar day. Figure 4 (b) is the power supply or power consumption diagram of the hydrogen island microgrid system under abnormal conditions on a single calendar day. Figure 4 (c) is a diagram of power supply or power consumption of a hydrogen island microgrid system under normal operating conditions of 8760 hours a year, selected from 150 hours. Figure 4 (d) is a power supply or power consumption diagram of a hydrogen-containing island microgrid system under multiple operating conditions for 150 hours out of 8760 hours a year;

[0050] Figure 5It is a structural diagram of an electronic device showing an operation scheduling method for a hydrogen-containing island microgrid system according to an exemplary embodiment. DETAILED DESCRIPTION

[0051] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0052] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0053] like Figure 1 As shown, the operation scheduling method of the hydrogen-containing island microgrid system of the present invention is specifically as follows:

[0054] First build Figure 2 The hydrogen-containing island microgrid system shown includes power generation equipment, system lines, basic loads, hydrogen energy storage devices and energy storage batteries. The basic loads are specifically important loads for maintaining lighting, heating and cooling, and operation scheduling within the system. During specific implementation, the power generation equipment includes wind power generation equipment and photovoltaic power generation equipment, and the hydrogen energy storage device includes an electrolyzer hydrogen production load, a hydrogen storage tank and a hydrogen fuel cell. The power generation equipment transmits electricity to the basic load, the electrolyzer hydrogen production load of the hydrogen energy storage device and the energy storage battery through the system lines. The hydrogen energy generated by the electrolyzer hydrogen production load is stored in the hydrogen storage tank, and the hydrogen energy is exported or transported to the hydrogen fuel cell through the hydrogen storage tank for power generation. The hydrogen energy storage device and the energy storage battery adjust the volatility difference between the power generation equipment and the basic load by charging and discharging the system lines. The capacity configuration parameters and performance parameters of the hydrogen-containing island microgrid system of the present invention are shown in Table 1:

[0055] Table 1

[0056]

[0057] The hydrogen production load power of the electrolyzer of the hydrogen energy storage device can be adjusted in the range of 20% to 120% of its rated power.

[0058] The base load of the hydrogen-containing island microgrid system is a critical load for maintaining the normal operation of the system. Because the electrolyzer should not be started and stopped frequently, the electrolyzer hydrogen production load must maintain its overall input power greater than or equal to 20% of the overall rated power. When the wind and photovoltaic power generation equipment has sufficient power, the wind and solar power generation equipment will completely provide power for the electrolyzer load, base load, and energy storage battery charging in the system. When the wind and solar power generation is insufficient to supply energy for the electrolyzer load and base load, the wind and solar power generation equipment and energy storage battery discharge to provide energy for the load. When the wind and solar power generation equipment and energy storage battery are insufficient to supply energy for the load, the wind and solar power generation equipment, energy storage battery discharge, and hydrogen fuel cell power generation will jointly provide energy for the load.

[0059] Then, the operating curve and operating characteristic parameters of the hydrogen-containing island microgrid system are obtained. The operating curve of the hydrogen-containing island microgrid system includes the power output curve of the power generation equipment and the power consumption curve of the basic load; the operating characteristic parameters include the power output curve of the unit capacity power generation equipment, the maximum charge and discharge power of the energy storage battery, the upper and lower limits of the charge state of the energy storage battery, the power consumption curve of the basic load at multiple time scales, the power adjustable range of the hydrogen production load of the electrolyzer of the hydrogen energy storage device, the maximum discharge power of the hydrogen fuel cell and the upper and lower limits of the hydrogen storage ratio of the hydrogen storage tank. The multiple time scales include a single calendar day and 8760 hours throughout the year. Figure 3 As shown in the figure, the power consumption curves of unit capacity wind power generation equipment, unit capacity photovoltaic power generation equipment and basic load at multiple time scales are as follows: Figure 3 As shown in (a), the output power of wind power generation equipment with unit capacity fluctuates mainly between 0 and 0.8 pu in 8760 hours throughout the year. Figure 3 As shown in (b), the wind power generation equipment of unit capacity has the characteristics of high output in the morning and evening and low output at noon within a single calendar day; Figure 3 As shown in (c), the output power of photovoltaic power generation equipment with unit capacity fluctuates mainly between 0 and 0.9 pu in 8760 hours throughout the year. Figure 3 As shown in (d), the photovoltaic power generation equipment of unit capacity has the characteristics of low output or no output in the morning and evening, and high output at noon within a single calendar day; Figure 3 As shown in (e), the base load in the system fluctuates between 0 and 6200 kW in 8760 hours throughout the year. Figure 3 As shown in (f), the peak period of the basic load in the system during a single calendar day is the 14th to 20th period.

[0060] Then, a multi-objective optimization operation model of the hydrogen island microgrid system under multiple time scales and multiple operating conditions is established based on operation restriction constraints, as follows:

[0061] min F run =∑T t=1 [ c Wind run P Wind t + c PV run P PV t + c Batt run P Batt t + c FC run P FC t + c EC run ( N run t P EC t + N stop t P EC stop )]

[0062] min F num =∑ T t=2 max[sgn( P Batt t · P Batt t-1 ),0]

[0063] min F wave =∑ T t=2 min[max(| P Batt t |)]

[0064] in, F run is the total operating cost of the hydrogen island microgrid system; T is the length of the time scale, in h; c Wind run 、 c PVrun 、 c Batt run 、 c FC run and c EC run are the unit dispatch costs of wind power generation equipment, photovoltaic power generation equipment, energy storage batteries, hydrogen energy storage devices and electrolyzer hydrogen production loads respectively; P Wind t 、 P PV t 、 P Batt t and P FC t are the power values ​​input into or obtained from the hydrogen island microgrid system during period t for wind power generation equipment, photovoltaic power generation equipment, energy storage battery, and hydrogen energy storage device, respectively. P Batt t-1 Input the power value of the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system to the energy storage battery during the t-1 period; P EC t is the input power of a single electrolyzer operating in normal state during the hydrogen production load of the electrolyzer during period t; P EC stop The input power of a single electrolytic cell when it is in shutdown and heat preservation state; N run t and N stop t are the number of electrolyzers in the electrolyzer hydrogen production load working in normal state and shutdown and heat preservation state during period t respectively; F num and F wave are the total charge and discharge times and the total state of charge fluctuation range of the energy storage battery in the hydrogen island microgrid system, respectively; sgn( ) is the judgment symbol, which outputs 1 when the input is positive, 0 when the input is 0, and -1 when the input is negative.

[0065] The power dispatching capacity of the hydrogen-containing island microgrid system includes the power values ​​input into the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system by the power generation equipment, energy storage batteries and hydrogen energy storage devices during period t, as well as the input power of a single electrolyzer in the electrolyzer hydrogen production load working in a normal state during period t; the operation of the hydrogen-containing island microgrid system is dispatched according to the power dispatching capacity, and the excess power of the power generation equipment is abandoned during the dispatching process.

[0066] During the operation of the hydrogen island microgrid system, the operating cost includes the scheduling cost caused by the power changes of power generation equipment, energy storage batteries, hydrogen energy storage devices, and adjustable hydrogen production loads; the number of charge and discharge times of the energy storage battery is judged by the positive and negative value changes of the energy storage battery output power at the adjacent moments, and the number of charge and discharge times of the energy storage battery within a certain period of time is statistically obtained; the charge state fluctuation range of the energy storage battery is judged by the maximum and minimum values ​​of the energy storage battery output power within a period of time; the goal of the multi-objective optimization operation model is to minimize the overall operating cost of the system, minimize the charge and discharge times of the energy storage battery, and minimize the charge state fluctuation range of the energy storage battery. The cost can be specifically measured by power value.

[0067] Operational constraints include power balance and equipment operation constraints, as well as the operation constraints of hydrogen energy storage devices to independently supply base loads, as follows:

[0068] a) Power balance and equipment operation constraints:

[0069] P Wind t + P PV t + P Batt t+ P FC t= P EL t+ P Base t

[0070] 0≤ P Wind t ≤ P WF t

[0071] 0≤ P PV t ≤ P PC t

[0072] P Batt min ≤ P Battt ≤ P Batt max

[0073] S Batt min ≤ S Batt t ≤ S Batt max

[0074] P Batt t =0, S Batt max ≤ S Batt t or S Batt t ≤ S Batt min

[0075] 0≤ P FC t ≤ βη e-FC V FC t

[0076] S HT min ≤ S HT t ≤ S HT max

[0077] P FC t =0, S HT max ≤ S HT t or S HT t ≤ S HT min

[0078] P EL t =N run t P EC t + N stop t P EC stop

[0079] P EC min ≤ P EC t ≤ P EC max

[0080] P sys Wind = C Wind · P unit Wind

[0081] P sys PV = C PV · P unit PV

[0082] in, P WF t and P PC t are the upper limits of the system power input to the wind power generation equipment and photovoltaic power generation equipment in period t respectively; P Batt t 、 P Batt max and P Batt min are the power value and its upper and lower limits input by the energy storage battery into the hydrogen island microgrid system or obtained from the hydrogen island microgrid system during period t; P FC t Input the power value of the hydrogen island microgrid system for the hydrogen energy storage device during period t; P EL t is the overall input power of the electrolyzer array in the electrolyzer hydrogen production load during period t;P Base t is the power consumption of the base load that needs to be supplied during period t; P EC t 、 P EC max and P EC min are the input power and upper and lower limits of a single electrolyzer operating in a normal state during the electrolyzer hydrogen production load in period t; S Batt t 、S Batt max and S Batt min are the state of charge of the energy storage battery and its upper and lower limits in period t respectively; β is the hydrogen-to-electricity conversion coefficient of hydrogen; η e-FC is the output electrical efficiency of the hydrogen fuel cell; V FC t is the hydrogen consumption of the hydrogen fuel cell during period t; S HT t 、 S HT max and S HT min are the hydrogen storage ratio and its upper and lower limits of the hydrogen storage tank in period t respectively; N run t and N stop t are the number of electrolyzers in the electrolyzer hydrogen production load working in normal state and shutdown and heat preservation state during period t respectively; P EC stop It is the input power of a single electrolytic cell when it is in shutdown and heat preservation state. P EC min Possible values ​​are P EC stop ; P sys Wind and P sys PV are the serialized vectors of power output curves of wind power generation equipment and photovoltaic power generation equipment respectively; C Wind and CPV are the configuration capacities of wind power generation equipment and photovoltaic power generation equipment respectively; P unit Wind and P unit PV They are the power generation output curves of unit capacity wind power generation equipment and photovoltaic power generation equipment respectively.

[0083] b) Operational constraints for hydrogen energy storage devices to independently supply base load:

[0084] P Base t · T Base limit ≤( S Batt t - S Batt min )· E Batt N

[0085] in, P Base t is the power consumption of the base load that needs to be supplied during period t; T Base limit The duration for which the base load needs to be guaranteed; S Batt t and S Batt min are the state of charge of the energy storage battery and its lower limit in period t respectively; E Batt N is the rated capacity of the energy storage battery.

[0086] There are important loads in the system to maintain the normal operation of the system as a whole. The configured energy storage system should ensure that its power can supply the basic load for a period of time, allowing the system to have enough time to deal with various faults.

[0087] The power consumption curve of the base load of the hydrogen-containing island microgrid system is the power consumption of the base load that needs to be guaranteed in each time period; the maximum charge and discharge power of the energy storage battery includes the upper and lower limits of the power value input by the energy storage battery to the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system in time period t; the power consumption curve of the base load in multiple time scales is the power consumption of the base load that needs to be guaranteed in the total time scale; the upper limit of the power adjustable range of the hydrogen production load of the electrolyzer of the hydrogen energy storage device is the power value when all electrolyzers are operating at the upper limit of the input power, and the lower limit of the power adjustable range is the power value when all electrolyzers are operating in the shutdown and insulation state; the maximum discharge power of the hydrogen fuel cell is the discharge power of the maximum volume of hydrogen that can be input into the hydrogen fuel cell by the hydrogen storage tank converted into electrical energy.

[0088] The operating condition is judged according to the current operating status of the hydrogen-containing island microgrid system, so as to adjust the operating restriction constraints. The operating conditions of the hydrogen-containing island microgrid system include normal operating conditions, machine tripping conditions, load shedding conditions and energy storage battery short-term fault conditions. When in normal operating conditions, the operating restriction constraints are not adjusted. When in machine tripping conditions, the upper limit of the power value input by the power generation equipment into the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system in the operating restriction constraints is reduced to a preset first power threshold. When in load shedding conditions, the power consumption of the basic load that needs to be guaranteed in the operating restriction constraints is reduced to a preset second power threshold. When in energy storage battery short-term fault conditions, the upper limit of the charge and discharge of the energy storage battery in the operating restriction constraints is reduced to a preset third power threshold, and the lower limit of the charge and discharge of the energy storage battery in the operating restriction constraints is increased to a preset fourth power threshold.

[0089] Finally, the operating curve and operating characteristic parameters of the hydrogen-containing island microgrid system are input into the multi-objective optimization operation model for processing. After processing, the multi-objective optimization operation model outputs the power dispatch amount of the hydrogen-containing island microgrid system, and then the operation of the hydrogen-containing island microgrid system is dispatched. The operation dispatch idea of ​​the hydrogen-containing island microgrid system is to calculate the operation dispatch plan of the system in a single calendar day and 8760 hours a year under normal operating conditions, and obtain the operation results of the power input and input of each device in the system; within a single calendar day, set abnormal operating conditions such as machine cutting conditions, load cutting conditions, and short-term failure conditions of energy storage batteries, and obtain the operation results of the power input and output of each device in the system under abnormal conditions. Then record the operation results of the system under multiple time scales and multiple operating conditions, such as Figure 4 As shown, Figure 4 (a) and Figure 4 As shown in (b), it includes the operating results of the hydrogen island microgrid system under normal conditions and abnormal conditions such as turbine tripping, load shedding, and short-term energy storage battery failure in a single calendar day. The abnormal conditions include wind turbine tripping failure in the 4th period, load shedding failure in the 8th period, and short-term energy storage battery failure in the 15th period, as shown in (b). Figure 4 As shown in (a), under normal operating conditions, the operation scheduling method proposed in the present invention can obtain the input and output power schemes of wind power, photovoltaic power, energy storage, hydrogen fuel cells and hydrogen production loads within a single calendar day, which can maintain the power consumption of the base load with a fluctuation of 0~7MW and provide energy for the hydrogen production load with a fluctuation of 0~4MW. Figure 4 As shown in (b), under abnormal operating conditions such as machine shedding, load shedding, and short-term failure of energy storage batteries in a single calendar day, the operation scheduling method proposed in the present invention can obtain the input and output power schemes of wind power, photovoltaic power, energy storage, hydrogen fuel cells, and hydrogen production loads under abnormal operating conditions. It can maintain the power consumption of the base load with fluctuations of 0-7MW under abnormal operating conditions, and at the same time, through active regulation, provide energy for the hydrogen production load with fluctuations of 0-10MW; as shown in (b) of the present invention, under abnormal operating conditions such as machine shedding, load shedding, and short-term failure of energy storage batteries in a single calendar day, it can obtain the input and output power schemes of wind power, photovoltaic power, energy storage, hydrogen fuel cells, and hydrogen production loads under abnormal operating conditions. Figure 4 (c) and Figure 4 As shown in (d), it contains the operating results under normal working conditions for 8760 hours throughout the year and under abnormal working conditions set multiple times at random at different time points. The operating results of the first 150 hours are selected for display, as shown in Figure 4 As shown in (c), under normal operating conditions, the operation scheduling method proposed in the present invention can obtain the input and output power schemes of wind power, photovoltaic power, energy storage, hydrogen fuel cells and hydrogen production load for 8760 hours a year, which can maintain the power consumption of the base load with fluctuations of 0~7MW and provide energy for the hydrogen production load with fluctuations of 0~14MW. Figure 4 As shown in (b), under abnormal operating conditions such as machine shedding, load shedding, and short-term failure of energy storage batteries occurring at random times during the 8760 hours of the year, the operation scheduling method proposed in the present invention can obtain the input and output power schemes of wind power, photovoltaic power, energy storage, hydrogen fuel cells, and hydrogen production loads under abnormal operating conditions. It can maintain the basic load power consumption with a fluctuation of 0~6.2MW under abnormal operating conditions, and at the same time, through active regulation, it can provide energy for the hydrogen production load with a fluctuation of 0~18MW.

[0090] The present invention realizes the operation scheduling of the system under normal operating conditions and various abnormal operating conditions by modifying the input parameters of the multi-objective optimization operation model. By solving the multi-objective optimization operation model based on different input parameters, the power generation or power consumption of each device in the system in each time period under various operating conditions can be obtained, that is, the operation scheduling results of the system under multiple time scales and multiple operating conditions are obtained.

[0091] Based on the operation scheduling results obtained in the embodiments of the present invention, the system's performance parameters over a long time scale and under multiple operating conditions are calculated, including the system's base load power shortage rate and the number of energy storage battery charge and discharge cycles. As shown in Table 2, the long time scale is 8760 hours per year, and the multiple operating conditions involve randomly setting multiple generator trips, load shedding, and short-term energy storage battery failures at different time points during the 8760 hours of operation. This results in the input parameters for a multi-objective optimization operation model that includes normal operating conditions and multiple and diverse abnormal operating conditions.

[0092] The basic load power shortage rate is as follows:

[0093] β fail load =( T fail load / 8760)×100%

[0094] in, β fail load The power shortage rate of the basic load; T fail load The number of hours out of 8,760 hours in a year when the system fails to maintain power balance, resulting in a lack of power supply to the baseload. The number of charge and discharge cycles of the energy storage battery can be directly obtained during the solution of the multi-objective optimization operation model.

[0095] Table 3 shows a comparison of the charge and discharge indicators of the energy storage batteries in the system obtained by using the multi-objective optimization operation model that considers the life of the energy storage batteries and the single-objective optimization operation model that only considers the operation cost. This comparison clearly shows the effectiveness of the operation method based on the multi-objective optimization operation model proposed in the present invention in reducing the number of charge and discharge times of the energy storage batteries and constraining the charge and discharge depth of the energy storage batteries.

[0096] Table 2

[0097]

[0098] Table 3

[0099]

[0100] The present invention can obtain the configuration parameters and operating constraints of each device in the system and predict the output curve of wind and solar power generation by obtaining relevant data such as the composition architecture, equipment configuration, and operating characteristics of the hydrogen-containing island microgrid system; and can provide input parameters and a basic framework for the subsequent formulation of an optimized operating mode for the hydrogen-containing island microgrid system by obtaining the operating mode of the hydrogen-containing island microgrid system. It can ensure the power supply and demand balance of the hydrogen-containing island microgrid system at multiple time scales, and reduce the life loss of the energy storage battery by optimizing the charge and discharge times and charge and discharge depth of the energy storage battery. The present invention can establish a multi-objective optimization operation model and model solution that takes into account power balance constraints, equipment operation constraints, and the operation constraints of the hydrogen energy storage device to independently supply the basic load, and obtain an optimized solution for the power input or output of each device in the hydrogen-containing island microgrid system within a certain time range, providing a basis for the operation scheduling of the hydrogen-containing island microgrid system under multiple time scales and multiple working conditions.

[0101] like Figure 5 As shown, the electronic device of the present invention includes a processor, an internal bus, a network interface and a memory module, and the processor interacts with the network interface and the memory module respectively through the internal bus. The present invention also includes an operation scheduling device for a hydrogen-containing island microgrid system, including a data acquisition module, a model construction module, a constraint adjustment module and an operation scheduling module. The data acquisition module is used to obtain the operation curve and operation characteristic parameters of the hydrogen-containing island microgrid system; the model construction module is used to establish a multi-objective optimization operation model of the hydrogen-containing island microgrid system under multiple time scales and multiple working conditions based on operation limit constraints; the constraint adjustment module is used to make an operating condition judgment based on the current operating state of the hydrogen-containing island microgrid system, thereby adjusting the operation limit constraints; the operation scheduling module is used to input the operation curve and operation characteristic parameters of the hydrogen-containing island microgrid system into the multi-objective optimization operation model for processing, and the multi-objective optimization operation model outputs the power scheduling amount of the hydrogen-containing island microgrid system after processing, thereby performing operation scheduling on the hydrogen-containing island microgrid system.

[0102] The operation scheduling method, device and medium of the present invention can effectively reduce the number of charge and discharge times of the energy storage battery and constrain the charge and discharge depth of the energy storage battery, ensure the power balance of the system, and provide a reference for the iterative adjustment of the configuration scheme and operation mode of the hydrogen-containing island microgrid system.

[0103] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present application can be implemented using various computer languages. The present application is described based on the flowcharts of the methods, systems, and computer program products of the embodiments of the present application.

[0104] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the present invention is intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0105] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the equivalent technology of the present invention, the present application is intended to include these modifications and variations.

Claims

1. An operation scheduling method for a hydrogen-containing island microgrid system, characterized in that: include: Step 1) obtaining the operating curve and operating characteristic parameters of the hydrogen-containing island microgrid system; Step 2) Establish a multi-objective optimization operation model for the hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions based on operation constraints. The operation constraints include power balance and equipment operation constraints, as well as the operation constraints of the hydrogen energy storage device to independently supply the base load. Step 3) Based on the current operating state of the hydrogen island microgrid system, the operating condition is judged to adjust the operating constraints. The operating curve and operating characteristic parameters of the hydrogen island microgrid system are then input into the multi-objective optimization operation model for processing. After processing, the multi-objective optimization operation model outputs the power dispatch amount of the hydrogen island microgrid system, and then the operation of the hydrogen island microgrid system is dispatched; In the step 1), the hydrogen-containing island microgrid system includes power generation equipment, system lines, base loads, hydrogen energy storage devices and energy storage batteries. The hydrogen energy storage device includes an electrolyzer hydrogen production load, a hydrogen storage tank and a hydrogen fuel cell. The power generation equipment transmits electricity to the base load, the electrolyzer hydrogen production load and the energy storage battery of the hydrogen energy storage device through the system line. The hydrogen energy generated by the electrolyzer hydrogen production load is stored in the hydrogen storage tank, and the hydrogen energy is exported or transported to the hydrogen fuel cell through the hydrogen storage tank to generate electricity. The hydrogen energy storage device and the energy storage battery adjust the volatility difference between the power generation equipment and the base load by charging and discharging the system line. In step 2), the multi-objective optimization operation model of the hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions is as follows: min F run =∑ T t=1 [ c E run P E t + c Batt run P Batt t + c FC run P FC t + c EC run ( N run t P EC t + N stop t P EC stop )] my F num =∑ T t=2 max[sgn( P Batt t · P Batt t-1 ),0] my F wave =∑ T t=2 min[max(| P Batt t |)] in, F run is the total operating cost of the hydrogen island microgrid system; T is the length of the time scale; c E run 、 c Batt run 、 c FC run and c EC run are the unit dispatch costs of power generation equipment, energy storage batteries, hydrogen energy storage devices, and electrolyzer hydrogen production loads respectively; P E t 、 P Batt t and P FC t The power values ​​input into or obtained from the hydrogen island microgrid system for the power generation equipment, energy storage battery and hydrogen energy storage device during period t are respectively: P Batt t-1 Input the power value of the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system to the energy storage battery during the t-1 period; P EC t is the input power of a single electrolyzer operating in normal state during the hydrogen production load of the electrolyzer during period t; P EC stop The input power of a single electrolytic cell when it is in shutdown and heat preservation state; N run t and N stop t are the number of electrolyzers in the electrolyzer hydrogen production load working in normal state and shutdown and heat preservation state during period t respectively; F num and F wave are the total charge and discharge times and the total state of charge fluctuation range of the energy storage battery of the hydrogen island microgrid system; sgn( ) is the judgment symbol, which outputs 1 when the input is positive, 0 when the input is 0, and -1 when the input is negative; The power dispatch amount of the hydrogen island microgrid system includes the power values ​​input into or obtained from the hydrogen island microgrid system by the power generation equipment, energy storage batteries and hydrogen energy storage devices during period t, as well as the input power of a single electrolyzer in the electrolyzer hydrogen production load working in a normal state during period t; the hydrogen island microgrid system is operated and dispatched according to the power dispatch amount, and the excess power of the power generation equipment is abandoned during the dispatch process; In the step 3), the operating condition is judged according to the current operating state of the hydrogen-containing island microgrid system, and the operating conditions of the hydrogen-containing island microgrid system include normal operating conditions, machine tripping conditions, load shedding conditions and energy storage battery short-term fault conditions; when in normal operating conditions, the operating restriction constraint is not adjusted; when in the machine tripping condition, the upper limit of the power value input by the power generation equipment into the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system in the operating restriction constraint is reduced to a preset first power threshold; when in the load shedding condition, the power consumption of the basic load that needs to be guaranteed in the operating restriction constraint is reduced to a preset second power threshold; when in the energy storage battery short-term fault condition, the upper limit of the charge and discharge of the energy storage battery in the operating restriction constraint is reduced to a preset third power threshold, and the lower limit of the charge and discharge of the energy storage battery in the operating restriction constraint is increased to a preset fourth power threshold.

2. The operation and scheduling method of the hydrogen-containing island microgrid system according to claim 1 is characterized in that: In the step 1), the operating curve of the hydrogen-containing island microgrid system includes the power output curve of the power generation equipment and the power consumption curve of the base load; the operating characteristic parameters include the power output curve of the unit capacity power generation equipment, the maximum charge and discharge power of the energy storage battery, the upper and lower limits of the state of charge of the energy storage battery, the power consumption curve of the base load at multiple time scales, the power adjustable range of the hydrogen production load of the electrolyzer of the hydrogen energy storage device, the maximum discharge power of the hydrogen fuel cell, and the upper and lower limits of the hydrogen storage ratio of the hydrogen storage tank.

3. The operation and scheduling method of the hydrogen-containing island microgrid system according to claim 1 is characterized in that: In step 2), the power balance and equipment operation constraints are as follows: P E t + P Batt t + P FC t = P EL t + P Base t 0≤ P E t ≤ P Emax t P Batt min ≤ P Batt t ≤ P Batt max S Batt min ≤ S Batt t ≤ S Batt max P Batt t =0, S Batt max ≤ S Batt t or S Batt t ≤ S Batt min 0≤ P FC t ≤ βη e-FC V FC t S HT min ≤ S HT t ≤ S HT max P FC t =0, S HT max ≤ S HT t or S HT t ≤ S HT min P EL t = N run t P EC t + N stop t P EC stop P EC min ≤ P EC t ≤ P EC max P sys E = C E · P unit E in, P E t and P Emax t are the power value and its upper limit inputted into or obtained from the hydrogen island microgrid system by the power generation equipment during period t; P Batt t 、 P Batt max and P Batt min are the power value and its upper and lower limits input by the energy storage battery into the hydrogen island microgrid system or obtained from the hydrogen island microgrid system during period t; P FC t Input the power value of the hydrogen island microgrid system for the hydrogen energy storage device during period t; P EL t is the overall input power of the electrolyzer array in the electrolyzer hydrogen production load during period t; P Base t is the power consumption of the base load that needs to be supplied during period t; P EC t 、 P EC max and P EC min are the input power and upper and lower limits of a single electrolyzer operating in a normal state during the electrolyzer hydrogen production load in period t; S Batt t 、 S Batt max and S Batt min are the state of charge of the energy storage battery and its upper and lower limits in period t respectively; β is the hydrogen-to-electricity conversion coefficient of hydrogen; η e-FC is the output electrical efficiency of the hydrogen fuel cell; V FC t is the hydrogen consumption of the hydrogen fuel cell during period t; S HT t 、 S HT max and S HT min are the hydrogen storage ratio and its upper and lower limits of the hydrogen storage tank in period t respectively; N run t and N stop t are the number of electrolyzers in the electrolyzer hydrogen production load working in normal state and shutdown and heat preservation state during period t respectively; P EC stop The input power of a single electrolytic cell when it is in shutdown and heat preservation state; P sys E It is the power output curve of the power generation equipment; C E Configure capacity for power generation equipment; P unit E It is the power output curve of the unit capacity power generation equipment; The power consumption curve of the base load of the hydrogen-containing island microgrid system is the power consumption of the base load that needs to be guaranteed in each time period; the maximum charge and discharge power of the energy storage battery includes the upper and lower limits of the power value input by the energy storage battery to the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system in time period t; the power consumption curve of the base load in multiple time scales is the power consumption of the base load that needs to be guaranteed in the total time scale; the upper limit of the power adjustable range of the hydrogen production load of the electrolyzer of the hydrogen energy storage device is the power value when all electrolyzers are operating at the upper limit of the input power, and the lower limit of the power adjustable range is the power value when all electrolyzers are operating in the shutdown and insulation state; the maximum discharge power of the hydrogen fuel cell is the discharge power of the maximum volume of hydrogen that can be input into the hydrogen fuel cell by the hydrogen storage tank converted into electrical energy.

4. The operation and scheduling method of the hydrogen-containing island microgrid system according to claim 1 is characterized in that: In step 2), the operating constraints for the hydrogen energy storage device to independently supply the base load are as follows: P Base t · T Base limit ≤( S Batt t - S Batt min )· E Batt N in, P Base t is the power consumption of the base load that needs to be supplied during period t; T Base limit The duration for which the base load needs to be guaranteed; S Batt t and S Batt min are the state of charge of the energy storage battery and its lower limit in period t respectively; E Batt N is the rated capacity of the energy storage battery.

5. An operation and scheduling device for a hydrogen-containing isolated island microgrid system applicable to the method according to any one of claims 1 to 4, characterized in that: include: A data acquisition module is used to obtain the operating curve and operating characteristic parameters of the hydrogen-containing island microgrid system; A model building module is used to establish a multi-objective optimization operation model of a hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions based on operation constraints; A constraint adjustment module is used to make operating condition judgments based on the current operating status of the hydrogen island microgrid system, thereby adjusting the operating limit constraints; The operation scheduling module is used to input the operation curve and operation characteristic parameters of the hydrogen-containing island microgrid system into the multi-objective optimization operation model for processing. After processing, the multi-objective optimization operation model outputs the power scheduling amount of the hydrogen-containing island microgrid system, and then performs operation scheduling on the hydrogen-containing island microgrid system.

6. An electronic device, characterized in that: include: A memory and a processor coupled to each other, wherein the memory stores program data, and the processor calls the program data to execute the method according to any one of claims 1 to 4.

7. A computer-readable storage medium having program data stored thereon, characterized in that: When the program data is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

Images