Operation scheduling method and device for hydrogen-containing island micro-grid system, and medium

Abstract

The invention discloses an operation scheduling method and device for a hydrogen-containing island micro-grid system and a medium. The method comprises the steps of firstly obtaining an operation curve and operation characteristic parameters of a hydrogen-containing island micro-grid system, then establishing a multi-target optimization operation model of the system under multiple time scales and multiple working conditions based on operation limitation constraints, carrying out working condition judgment according to the current operation state of the system, adjusting the operation limitation constraints, and carrying out optimization operation on the hydrogen-containing island micro-grid system. And inputting the operation curve and the operation characteristic parameters into the model, processing, outputting the power scheduling amount of the system, and performing operation scheduling. Under the condition of ensuring system power balance and considering the service life of the energy storage battery, operation scheduling of the hydrogen-containing island micro-grid system under multiple time scales and multiple working conditions can be carried out, the method can be used for adjusting the configuration scheme and the operation mode of the system, and the rationality of the implementation scheme of the system is improved.

Description

Technical Field

[0001] The present invention relates to a method for dispatching operation of a power grid system, and to the technical field of electric power operation, and in particular to a method, device and medium for dispatching operation of a hydrogen-containing isolated island microgrid system. Background Art

[0002] The hydrogen-containing island microgrid system is an off-grid operating system powered by renewable energy sources such as wind power and photovoltaics. Inside the hydrogen-containing island microgrid system, the hydrogen energy storage device composed of an electrolyzer hydrogen production load, a hydrogen storage tank, and a hydrogen fuel cell can work in conjunction with the energy storage battery while producing and storing hydrogen to ensure the power balance of the system. Incorporating an adjustable electrolyzer hydrogen production load into the island microgrid system can effectively increase the off-grid system's absorption rate for uncertain renewable electricity 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-time scale and multi-operating condition operation and scheduling methods for hydrogen-containing island microgrid systems. The operation and scheduling of hydrogen-containing island microgrid systems only stays on a single time scale and a single operating condition, which is not conducive to exploring the advantages of hydrogen-containing island microgrid systems in long time scales and multi-operating condition scenarios. Summary of the invention

[0003] In order to solve the problems existing in the background technology, the present invention provides an operation scheduling method, device and medium of a hydrogen-containing island microgrid system. The present invention can solve the technical problem of the lack of a multi-time scale and multi-operating condition operation scheduling method of a hydrogen-containing island microgrid system in the related technology.

[0004] The technical solution adopted by the present invention is: 1. An operation and dispatching method for a hydrogen-containing island microgrid system: Step 1) Obtain the operating curve and operating characteristic parameters of the hydrogen island microgrid system.

[0005] Step 2) Establish a multi-objective optimization operation model of the hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions based on operation restriction constraints. The operation restriction constraints include power balance and equipment operation constraints and the operation constraints of the hydrogen energy storage device to independently supply the base load.

[0006] Step 3) The operating condition is judged according to the current operating status of the hydrogen island microgrid system, so as to adjust the operating restriction constraints, and then the operating curve and operating characteristic parameters of the hydrogen 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 island microgrid system, and then the operation dispatch of the hydrogen island microgrid system is carried out.

[0007] In the step 1), the hydrogen-containing island microgrid system includes power generation equipment, system lines, basic 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 basic 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 sent out 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 line. The basic load is specifically an important load for maintaining lighting, heating and cooling, and operation scheduling in the system.

[0008] In the step 1), the operation curve of the hydrogen-containing island microgrid system includes the power generation output curve of the power generation equipment and the power consumption curve of the basic load; the operation characteristic parameters include the power generation 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 on 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.

[0009] In the 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 )] min F num =∑ T t=2 max[sgn( P Batt t · P Batt t-1 ),0] min F wave =∑ T t=2 min[max(| P Batt t |)] in, F run is the total operating cost of the hydrogen-containing 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 They are the unit dispatch costs of power generation equipment, energy storage batteries, hydrogen energy storage devices and electrolyzer hydrogen production loads; P E t , P Batt t and P FC t are 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, 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 working in normal state in the electrolyzer hydrogen production load during period t; P EC stop It is the input power of a single electrolytic cell when it is in shutdown and heat preservation state; N run t and N stop tare the number of electrolyzers in the electrolyzer hydrogen production load working in the normal state and the shutdown and insulation state during the period t, respectively; F num and F wave They are the total charge and discharge times and the total charge state fluctuation range of the energy storage battery in the hydrogen island microgrid system; sgn( ) is the judgment symbol. When the input is positive, the output is 1; when the input is 0, the output is 0; and when the input is negative, the output is -1.

[0010] The power dispatch quantity of the hydrogen island microgrid system includes the power values ​​input into the hydrogen island microgrid system 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 quantity, and the excess power of the power generation equipment is abandoned during the dispatching process.

[0011] 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 determined 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 determined 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.

[0012] 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 PEC 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-containing island microgrid system by the power generation equipment in 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 time 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 basic load that needs to be supplied during period t; P EC t , P EC max and P EC minare the input power and its upper and lower limits of a single electrolyzer working in a normal state in the electrolyzer hydrogen production load during 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 the normal state and the shutdown and insulation state during the 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 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.

[0013] The power consumption curve of the basic load of the hydrogen island microgrid system is the power consumption of the basic load that needs to be guaranteed in each time period; the maximum charging and discharging power of the energy storage battery includes the upper and lower limits of the power value input into the hydrogen island microgrid system or obtained from the hydrogen island microgrid system by the energy storage battery in time period t; the power consumption curve of the basic load in multiple time scales is the power consumption of the basic load that needs to be guaranteed in the total time scale; the upper limit of the power adjustable range of the electrolyzer hydrogen production load of the hydrogen energy storage device is the power value when all electrolyzers are working 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 working 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.

[0014] In step 2), the operating constraints of 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 basic load that needs to be supplied during period t; T Base limit The length of time that 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.

[0015] 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.

[0016] 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 short-term fault conditions of energy storage batteries; when in normal operating conditions, the operating restriction constraints are not adjusted; when in the 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 the load shedding conditions, the power consumption of the basic load to be guaranteed in the operating restriction constraints is reduced to a preset second power threshold; when in the short-term fault condition of the energy storage battery, the upper limit of the charge and discharge of the energy storage battery in the operating restriction constraints is simultaneously 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.

[0017] 2. An operation and dispatching device for a hydrogen-containing isolated island microgrid system: The data acquisition module is used to obtain the operating curve and operating characteristic parameters of the hydrogen-containing island microgrid system.

[0018] The model building module is used to establish a multi-objective optimization operation model of a hydrogen island microgrid system under multiple time scales and multiple operating conditions based on operation restriction constraints.

[0019] The constraint adjustment module is used to make operating condition judgment according to the current operating state of the hydrogen island microgrid system, so as to adjust the operating limit constraints.

[0020] 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 by the multi-objective optimization operation model, the power scheduling amount of the hydrogen-containing island microgrid system is output, and then the operation scheduling of the hydrogen-containing island microgrid system is carried out.

[0021] 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.

[0022] 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.

[0023] The beneficial effects of the present invention are: The present invention obtains the operating mode of the hydrogen-containing island microgrid system by acquiring 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, taking 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 according to the operating results, the performance parameters of the system under long time scales and multiple working conditions are obtained, thereby adjusting the configuration plan and operating mode of the system and improving the rationality of the system implementation plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a flow chart of the method of the present invention; Figure 2 is a schematic diagram of the composition structure of a hydrogen-containing island microgrid system according to an exemplary embodiment; Figure 3 is an operating characteristic curve diagram of each device in a hydrogen-containing isolated 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 throughout the 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 power consumption curve of base load in 8760 hours throughout the year. Figure 3 (f) is the power consumption curve of the base load in a single calendar day; 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 power supply or power consumption diagram of a hydrogen-containing island microgrid system under normal operating conditions of 8760 hours a year, with a selection of 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 8760 hours a year, with a selection of 150 hours; Figure 5 It is a structural schematic diagram of an electronic device of an operation scheduling method of a hydrogen-containing island microgrid system according to an exemplary embodiment. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0026] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0027] like Figure 1 As shown, the operation scheduling method of the hydrogen-containing island microgrid system of the present invention is specifically as follows: First construct 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 in 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 externally transported 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: Table 1

[0028] The adjustable range of the electrolyzer hydrogen production load power of the hydrogen energy storage device is 20%~120% of its rated power.

[0029] The basic load of the hydrogen island microgrid system is an important load to maintain the normal operation of the system; because the electrolyzer should not be started and stopped frequently, the electrolyzer hydrogen production load needs to maintain its overall input power greater than or equal to 20% of the overall rated power. When the power of wind power generation equipment and photovoltaic power generation equipment is sufficient, the wind and solar power generation equipment will completely provide power supply for the electrolyzer load, basic load and energy storage battery charging in the system; when the wind and solar power generation is not enough to supply energy to the electrolyzer load and basic load, the wind and solar power generation equipment and energy storage battery discharge to supply energy to the load; when the wind and solar power generation equipment and energy storage battery are not enough to supply energy to the load, the wind and solar power generation equipment, energy storage battery discharge, and hydrogen fuel cell power generation will jointly supply energy to the load.

[0030] 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, it is the power consumption curve of unit capacity wind power generation equipment, unit capacity photovoltaic power generation equipment and basic load at multiple time scales, such as Figure 3 As shown in (a), the output power of wind power generation equipment per unit capacity fluctuates mainly between 0 and 0.8 pu within 8760 hours throughout the year, as shown in 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 in a single calendar day; Figure 3 As shown in (c), the output power of photovoltaic power generation equipment per unit capacity fluctuates mainly between 0 and 0.9 pu in 8760 hours throughout the year, as shown in Figure 3 As shown in (d), the photovoltaic power generation equipment with 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 basic load in the system during a single calendar day is the 14th to 20th period.

[0031] 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: min F run =∑ Tt=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 )] min F num =∑ T t=2 max[sgn( P Batt t · P Batt t-1 ),0] min F wave =∑ T t=2 min[max(| P Batt t |)] in, F run is the total operating cost of the hydrogen-containing island microgrid system; T is the length of the time scale, in h; c Wind run , c PV run , c Batt run, c FC run and c EC run They 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; P Wind t , P PV t , P Batt t and P FC t are the power values ​​input into the hydrogen-containing island microgrid system or obtained from the hydrogen-containing island microgrid system for the wind power generation equipment, photovoltaic power generation equipment, energy storage battery and hydrogen energy storage device during period t, 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 working in normal state in the electrolyzer hydrogen production load during period t; P EC stop It is 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 the normal state and the shutdown and insulation state during the period t, respectively; F num and F wave They are the total charge and discharge times and the total charge state fluctuation range of the energy storage battery in the hydrogen island microgrid system; sgn( ) is the judgment symbol. When the input is positive, the output is 1; when the input is 0, the output is 0; and when the input is negative, the output is -1.

[0032] The power dispatch quantity of the hydrogen island microgrid system includes the power values ​​input into the hydrogen island microgrid system 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 quantity, and the excess power of the power generation equipment is abandoned during the dispatching process.

[0033] 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 determined by the positive and negative value changes of the energy storage battery output power 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 charge state fluctuation range of the energy storage battery is determined 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.

[0034] The operation restriction constraints include power balance and equipment operation constraints and the operation constraints of hydrogen energy storage devices to independently supply the base load, as follows: a) Power balance and equipment operation constraints: P Wind t + P PV t + P Batt t+ P FC t= P EL t+ P Base t 0≤ P Wind t ≤ P WF t 0≤ P PV t ≤ P PC 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 Psys Wind = C Wind · P unit Wind P sys PV = C PV · P unit PV in, P WF t and P PC t are the upper limits of the system power input to the wind power generation equipment and the 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 time 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 basic load that needs to be supplied during period t; P EC t , P EC max and P EC min are the input power and its upper and lower limits of a single electrolyzer working in a normal state in the electrolyzer hydrogen production load during 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 the normal state and the shutdown and insulation state during the 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 The possible values ​​are P EC stop ; P sys Wind and P sys PV are the serialized vectors of power generation output curves of wind power generation equipment and photovoltaic power generation equipment respectively; C Wind and C PV 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.

[0035] b) Operational constraints of hydrogen energy storage devices to ensure base load supply alone: P Base t · T Base limit ≤( S Batt t - S Battmin ) E Batt N in, P Base t is the power consumption of the basic load that needs to be supplied during period t; T Base limit The length of time that 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.

[0036] 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.

[0037] The power consumption curve of the basic load of the hydrogen island microgrid system is the power consumption of the basic load that needs to be guaranteed in each time period; the maximum charging and discharging power of the energy storage battery includes the upper and lower limits of the power value input into the hydrogen island microgrid system or obtained from the hydrogen island microgrid system by the energy storage battery in time period t; the power consumption curve of the basic load in multiple time scales is the power consumption of the basic load that needs to be guaranteed in the total time scale; the upper limit of the power adjustable range of the electrolyzer hydrogen production load of the hydrogen energy storage device is the power value when all electrolyzers are working 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 working 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.

[0038] The operating condition is judged according to the current operating state of the hydrogen island microgrid system, so as to adjust the operating restriction constraint. The operating conditions of the hydrogen island microgrid system include normal operating condition, machine tripping condition, load shedding condition and short-term fault condition of energy storage battery. When it is in normal operating condition, the operating restriction constraint is not adjusted. When it is in machine tripping condition, the upper limit of the power value input into the hydrogen island microgrid system or obtained from the hydrogen island microgrid system by the power generation equipment in the operating restriction constraint is reduced to the preset first power threshold. When it is in load shedding condition, the power consumption of the basic load to be supplied in the operating restriction constraint is reduced to the preset second power threshold. When it is in the short-term fault condition of the energy storage battery, the upper limit of the charge and discharge of the energy storage battery in the operating restriction constraint is simultaneously reduced to the 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 the preset fourth power threshold.

[0039] Finally, the operation curve and operation 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 dispatch of the hydrogen-containing island microgrid system is carried out. The operation dispatch idea of ​​the hydrogen-containing island microgrid system, under normal operating conditions, calculates the operation dispatch plan of the system in a single calendar day and 8760 hours a year, and obtains the operation results of the power output and input of each device in the system; within a single calendar day, set abnormal operating conditions such as machine cutting conditions, load shedding 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 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 in a single calendar day and under abnormal conditions of machine cutting, load cutting, and short-term failure of energy storage batteries. The abnormal conditions include a wind turbine machine cutting failure in the 4th period, a load cutting failure in the 8th period, and a short-term failure of the energy storage battery in the 15th period, as shown in 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 basic load power consumption of 0~7MW fluctuations and provide energy for the hydrogen production load of 0~4MW fluctuations, as shown in FIG. Figure 4 As shown in (b), under abnormal 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, photovoltaics, energy storage, hydrogen fuel cells, and hydrogen production loads under abnormal conditions, and can maintain the basic load power consumption of 0~7MW fluctuations under abnormal conditions, and at the same time, through active regulation, provide energy for the hydrogen production load of 0~10MW fluctuations; as shown in (b) of the present invention, under abnormal conditions such as machine shedding, load shedding, and short-term failure of energy storage batteries in a single calendar day, the input and output power schemes of wind power, photovoltaics, energy storage, hydrogen fuel cells, and hydrogen production loads under abnormal conditions can be obtained, and the basic load power consumption of 0~7MW fluctuations can be maintained under abnormal conditions, and at the same time, through active regulation, energy can be provided for the hydrogen production load of 0~10MW fluctuations; Figure 4 (c) and Figure 4 As shown in (d), it contains the operating results under normal conditions for 8760 hours throughout the year and under multiple abnormal conditions set randomly 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, energy storage, hydrogen fuel cell and hydrogen production load for 8760 hours a year, which can maintain the basic load power consumption of 0~7MW fluctuation and provide energy for the hydrogen production load of 0~14MW fluctuation, as shown in FIG. Figure 4As shown in (b), under abnormal conditions such as machine shedding, load shedding, and short-term failure of energy storage batteries occurring at random times of 8760 hours throughout 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 conditions, and can maintain the basic load power consumption with fluctuations of 0~6.2MW under abnormal conditions, and at the same time, through active regulation, provide energy for the hydrogen production load with fluctuations of 0~18MW.

[0040] 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.

[0041] According to the operation scheduling results obtained in the embodiments of the present invention, the performance parameters of the system under long time scale and multiple working conditions are calculated, including the basic load power shortage rate of the system and the number of charge and discharge times of the energy storage battery, as shown in Table 2. The long time scale is 8760 hours throughout the year, and the multi-working condition effect is to randomly set multiple machine cutting, load cutting and energy storage battery short-term failures at different time points during the 8760 hours of operation throughout the year, and obtain the input parameters of the multi-objective optimization operation model including normal working conditions and multiple and multi-type abnormal working conditions.

[0042] The basic load power shortage rate is as follows: β fail load =( T fail load / 8760)×100% in, β fail load The power shortage rate of the base load; T fail load It is the number of hours in the 8760 hours of the year when the system cannot maintain power balance and the base load cannot get power supply. The number of times the energy storage battery is charged and discharged can be directly obtained in the process of solving the multi-objective optimization operation model.

[0043] Comparison of the charging and discharging indicators of the energy storage battery in the system obtained by the multi-objective optimization operation model considering the life of the energy storage battery adopted in the present invention and the single-objective optimization operation model considering only the operation cost is shown in Table 3. Through the comparison, it can be clearly seen that the operation method based on the multi-objective optimization operation model proposed in the present invention is effective in reducing the number of charge and discharge times of the energy storage battery and constraining the charge and discharge depth of the energy storage battery.

[0044] Table 2

[0045] Table 3

[0046] The present invention can obtain the configuration parameters and operation constraints of each device in the system and predict the output curve of wind and solar power generation by obtaining the composition architecture, equipment configuration, operation characteristics and other relevant data of the hydrogen-containing island microgrid system; and can provide input parameters and a basic framework for the subsequent formulation of the optimized operation mode of the hydrogen-containing island microgrid system by obtaining the operation mode of the hydrogen-containing island microgrid system. It can ensure the power 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 considers power balance constraints, equipment operation constraints, and the operation constraints of the hydrogen energy storage device to independently supply the basic load, and obtain the optimization scheme of 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 and scheduling of the hydrogen-containing island microgrid system under multiple time scales and multiple working conditions.

[0047] 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 restriction constraints; the constraint adjustment module is used to make an operating condition judgment according to the current operating state of the hydrogen-containing island microgrid system, thereby adjusting the operation restriction 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, and then performs operation scheduling on the hydrogen-containing island microgrid system.

[0048] 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 restrict 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 island microgrid system.

[0049] It should be understood by those skilled in the art that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present application may be implemented in various computer languages. The present application is described according to the flowcharts of the methods, systems and computer program products of the embodiments of the present application.

[0050] 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 concept. Therefore, the present invention is intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0051] Obviously, those skilled in the art can 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 belong to the scope of equivalent technologies of the present invention, the present application is also intended to include these modifications and variations.

Claims

1. An operation scheduling method for a hydrogen-containing isolated 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 of the hydrogen-containing island microgrid system under multiple time scales and multiple operating conditions based on operation restriction constraints, where the operation restriction constraints include power balance and equipment operation constraints and operation constraints of the hydrogen energy storage device to independently supply the base load; Step 3) The operating condition is judged according to the current operating status of the hydrogen island microgrid system, so as to adjust the operating restriction constraints, and then the operating curve and operating characteristic parameters of the hydrogen 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 island microgrid system, and then the operation dispatch of the hydrogen island microgrid system is carried out.

2. The operation and scheduling method of the hydrogen-containing isolated island microgrid system according to claim 1 is characterized in that: In the step 1), the hydrogen-containing island microgrid system includes power generation equipment, system lines, basic 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 basic load, the electrolyzer hydrogen production load and the energy storage battery of the hydrogen energy storage device 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 externally transported 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.

3. The operation and scheduling method of the hydrogen-containing isolated island microgrid system according to claim 2 is characterized in that: In the step 1), the operation curve of the hydrogen-containing island microgrid system includes the power generation output curve of the power generation equipment and the power consumption curve of the basic load; the operation characteristic parameters include the power generation 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 on 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.

4. The operation and scheduling method of the hydrogen-containing island microgrid system according to claim 2 is characterized in that: In the 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 They are the unit dispatch costs of power generation equipment, energy storage batteries, hydrogen energy storage devices and electrolyzer hydrogen production loads; P E t , P Batt t and P FC t are 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, 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 working in normal state in the electrolyzer hydrogen production load during period t; P EC stop It is 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 the normal state and the shutdown and insulation state during the period t, respectively; F num and F wave are the total charge and discharge times and the total charge state fluctuation range of the energy storage battery in the hydrogen island microgrid system; sgn( ) is the judgment symbol, when the input is positive, the output is 1, when the input is 0, the output is 0, and when the input is negative, the output is -1; The power dispatch quantity of the hydrogen island microgrid system includes the power values ​​input into the hydrogen island microgrid system 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 quantity, and the excess power of the power generation equipment is abandoned during the dispatching process.

5. The operation and scheduling method of the hydrogen-containing isolated island microgrid system according to claim 2 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-containing island microgrid system by the power generation equipment in 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-containing island microgrid system or obtained from the hydrogen-containing 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 time 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 basic load that needs to be supplied during period t; P EC t , P EC max and P EC min are the input power and its upper and lower limits of a single electrolyzer working in a normal state in the electrolyzer hydrogen production load during 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 the normal state and the shutdown and insulation state during the 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 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 basic load of the hydrogen island microgrid system is the power consumption of the basic load that needs to be guaranteed in each time period; the maximum charging and discharging power of the energy storage battery includes the upper and lower limits of the power value input into the hydrogen island microgrid system or obtained from the hydrogen island microgrid system by the energy storage battery in time period t; the power consumption curve of the basic load in multiple time scales is the power consumption of the basic load that needs to be guaranteed in the total time scale; the upper limit of the power adjustable range of the electrolyzer hydrogen production load of the hydrogen energy storage device is the power value when all electrolyzers are working 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 working 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.

6. The operation and scheduling method of the hydrogen-containing isolated island microgrid system according to claim 2 is characterized in that: In step 2), the operating constraints of 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 basic load that needs to be supplied during period t; T Base limit The length of time that 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.

7. The operation and scheduling method of the hydrogen-containing isolated island microgrid system according to claim 2 is characterized in that: 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 short-term fault conditions of energy storage batteries; when in normal operating conditions, the operating restriction constraints are not adjusted; when in the 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 the load shedding conditions, the power consumption of the basic load to be guaranteed in the operating restriction constraints is reduced to a preset second power threshold; when in the short-term fault condition of the energy storage battery, the upper limit of the charge and discharge of the energy storage battery in the operating restriction constraints is simultaneously 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.

8. An operation and dispatching device for a hydrogen-containing isolated island microgrid system applicable to the method according to any one of claims 1 to 7, characterized in that: include: A data acquisition module, used to obtain the operating curve and operating characteristic parameters of the hydrogen-containing island microgrid system; Model building module, used to establish a multi-objective optimization operation model of a hydrogen island microgrid system under multiple time scales and multiple operating conditions based on operation restriction constraints; A constraint adjustment module is used to make operating condition judgment according to the current operating state 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 by the multi-objective optimization operation model, the power scheduling amount of the hydrogen-containing island microgrid system is output, and then the operation scheduling of the hydrogen-containing island microgrid system is carried out.

9. 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 8.

10. 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 8 is implemented.

Images