Dispatching control method and system based on wind, solar, storage and power supply for hydrogen production

Abstract

The present invention belongs to the field of dispatching and controlling hydrogen production by electrolysis, and proposes a dispatching and controlling method and system for hydrogen production based on wind, solar, power storage and electricity. The main scheme is: judging whether the cumulative wind and solar output value in the wind and solar output time period reaches the preset threshold value of the electrolysis hydrogen production unit, and dispatching and controlling the cumulative wind and solar output value to supply power to the electrolysis hydrogen production unit, or to the electrolysis hydrogen production unit and the energy storage unit, or to the electrolysis hydrogen production unit, the energy storage unit and the microgrid according to the judgment result; judging whether the real-time capacity of the energy storage unit reaches the capacity threshold, and dispatching and controlling the energy storage unit to supply power to the electrolysis hydrogen production unit, or to the electrolysis hydrogen production unit and the microgrid according to the judgment result; judging whether the real-time voltage of the microgrid reaches the voltage threshold, and dispatching and controlling the microgrid to supply power to the load user, or to the load user and the public power grid according to the judgment result. The present invention can dynamically dispatch and control the hydrogen production, energy storage and grid connection process in the wind and solar power generation station.

Description

Technical Field

[0001] The present invention relates to the technical field of dispatching and controlling hydrogen production by electrolysis, and in particular to a dispatching and controlling method and system for hydrogen production based on wind, solar, power storage and electricity supply. Background Art

[0002] With the development of new energy technologies, wind and solar power stations have become more widely used.

[0003] At present, when generating electricity, wind power stations and photovoltaic power stations not only supply power to electrolyzers, but also store energy and connect to the grid. However, during the power generation process, the stability of wind power generation is poor, and photovoltaic power generation depends on the intensity of light, resulting in poor stability and intermittent power generation. At the same time, due to the electrolysis hydrogen production process, not only the water, reagents and power supply voltage required for the electrolyzer need to be equipped and replenished in time, but also the charge and discharge status of the battery used for energy storage needs to be reasonably regulated. If the monitoring and control of hydrogen production and energy storage are unreasonable, the grid connection work will be directly arranged, which will not only affect the normal electrolysis hydrogen production and energy storage process, but also cause fluctuations in the public power grid, affecting the normal transmission and distribution of the public power grid.

[0004] Therefore, a reasonable dispatching and control solution is urgently needed for sites that use wind, solar, power storage and electricity to produce hydrogen. Summary of the invention

[0005] The purpose of the present invention is to provide a dispatching and control method and system for hydrogen production based on wind, solar, energy storage and power supply. On the one hand, it can accurately dispatch and control the electrolysis hydrogen production, energy storage and grid connection process in the wind, solar, energy storage station, so that the electrolysis hydrogen production, energy storage and grid connection can achieve an effective balance. On the other hand, when the microgrid of the wind, solar, energy storage power station supplies power to the public power grid, it can also reasonably connect to the grid based on the actual situation in the station, instead of blindly connecting to the grid only considering the high grid-connected electricity price.

[0006] The present invention solves the technical problem and adopts the following technical solution:

[0007] On the one hand, the present invention provides a dispatching control method based on wind, solar, storage and power supply for hydrogen production, comprising the following steps:

[0008] Establish a mapping relationship table of wind and solar power output values ​​corresponding to different meteorological conditions;

[0009] Obtain real-time meteorological conditions, and determine whether the cumulative wind and solar power output value during the wind and solar power output time period reaches the preset threshold value of the electrolytic hydrogen production unit, and dispatch and control the cumulative wind and solar power output value to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the energy storage unit, or to the electrolytic hydrogen production unit, the energy storage unit and the microgrid according to the determination result;

[0010] Obtain the state of charge of the energy storage unit, and based on the state of charge, obtain the capacity threshold of the energy storage unit, and when the wind and solar power output supplies power to the energy storage unit, determine whether the real-time capacity of the energy storage unit reaches the capacity threshold, and dispatch and control the energy storage unit to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the microgrid according to the determination result;

[0011] Obtain the real-time load information of the microgrid and the voltage threshold under different load information, and when the wind and solar power output supplies power to the microgrid and / or the energy storage unit supplies power to the microgrid, determine whether the real-time voltage of the microgrid reaches the voltage threshold, and dispatch and control the microgrid to supply power to the load users, or to the load users and the public power grid based on the judgment result.

[0012] As a further optimization, after obtaining the real-time meteorological conditions, and judging whether the accumulated wind and solar power output value in the wind and solar power output time period reaches the preset threshold value of the electrolytic hydrogen production unit, it also includes:

[0013] When the wind and solar power generation starts, the meteorological conditions at that time are obtained, and the wind and solar power generation time period is divided into multiple sub-time periods according to the meteorological conditions at that time;

[0014] Obtain the meteorological conditions at the start time node and the middle time node of each sub-time period, and determine whether the change in the meteorological conditions at these two consecutive time nodes in any sub-time period exceeds the specified value. If not, obtain the meteorological conditions at the end time node of the current sub-time period, and obtain the wind and solar power output value at this time to perform the wind and solar power output of the next sub-time period;

[0015] If it exceeds, the meteorological conditions of the end time node of the current sub-time period are obtained, and the sub-time periods of the subsequent wind and solar power output time period are re-divided based on the meteorological conditions at this time.

[0016] As a further optimization, the preset threshold of the electrolysis hydrogen production unit includes a first preset threshold and a second preset threshold;

[0017] The first preset threshold is smaller than the second preset threshold.

[0018] As a further optimization, the method of judging whether the cumulative wind-solar output value in the wind-solar output time period reaches the preset threshold value of the electrolytic hydrogen production unit, and dispatching and controlling the cumulative wind-solar output value to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the energy storage unit, or to the electrolytic hydrogen production unit, the energy storage unit and the microgrid according to the judgment result, includes:

[0019] When the wind power generation equipment and the photovoltaic power generation equipment simultaneously supply power to the same electrolytic hydrogen production tank, the electrolytic hydrogen production tank is used as an electrolytic hydrogen production unit, and a preset threshold value of the electrolytic hydrogen production tank is obtained;

[0020] Starting from the first sub-time period of the wind and solar power output time period to the end time node of each subsequent sub-time period, it is judged in turn whether the cumulative wind and solar power output value reaches the first preset threshold value of the electrolytic hydrogen production unit. If it is not reached, the wind power generation equipment and the photovoltaic power generation equipment are controlled and dispatched to only supply power to the electrolytic hydrogen production unit;

[0021] When the accumulated wind and solar power output reaches the first preset threshold of the electrolytic hydrogen production unit, the sub-time period at this time is obtained, and starting from the start time node of the next sub-time period, to the subsequent sub-time periods, it is judged in turn whether the accumulated wind and solar power output reaches the second preset threshold of the electrolytic hydrogen production unit. If not, the wind power generation equipment and photovoltaic power generation equipment are controlled and dispatched to supply power to the electrolytic hydrogen production unit and the energy storage unit;

[0022] When the cumulative wind and solar power output reaches the second preset threshold of the hydrogen electrolysis unit, the sub-time period at this time is obtained, and starting from the start time node of the next sub-time period, until the subsequent sub-time period, the wind power generation equipment and photovoltaic power generation equipment are controlled and dispatched to supply power to the hydrogen electrolysis unit, the energy storage unit and the microgrid.

[0023] As a further optimization, when the wind power generation equipment and the photovoltaic power generation equipment respectively supply power to different hydrogen electrolysis cells, all different hydrogen electrolysis cells are used as hydrogen electrolysis units, and a preset threshold value of each hydrogen electrolysis cell is obtained.

[0024] As a further optimization, when the wind power generation equipment supplies power to the hydrogen electrolysis unit, the power supply voltage of the hydrogen electrolysis unit and the output voltage of the wind power generation equipment are obtained, and the output voltage is rectified and boosted so that the output voltage of the wind power generation equipment after boosting is equal to the power supply voltage, and then the hydrogen electrolysis unit is powered;

[0025] When the photovoltaic power generation equipment supplies power to the electrolytic hydrogen production unit, the output voltage of the photovoltaic power generation equipment is obtained and boosted so that the output voltage of the photovoltaic power generation equipment after boosting is equal to the power supply voltage, and then the electrolytic hydrogen production unit is powered.

[0026] As a further optimization, the state of charge of the energy storage unit is obtained, and the capacity threshold of the energy storage unit is obtained based on the state of charge, and when the wind and solar power output supplies power to the energy storage unit, it is determined whether the real-time capacity of the energy storage unit reaches the capacity threshold, and the energy storage unit is dispatched and controlled to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the microgrid according to the determination result, which means:

[0027] After the dispatching control accumulates the wind and solar power output to supply power to the hydrogen electrolysis unit and the energy storage unit, the charge state of the energy storage unit is obtained;

[0028] Setting a capacity threshold of the energy storage unit when the state of charge is 0.8, the capacity threshold including a first capacity threshold and a second capacity threshold, the first capacity threshold being less than the second capacity threshold;

[0029] Determine whether the real-time capacity of the energy storage unit has reached a first capacity threshold. If not, the energy storage unit is dispatched and controlled not to supply power to the hydrogen electrolysis unit and the microgrid. When the first capacity threshold is reached, determine whether the accumulated wind and solar power output is supplying power to the hydrogen electrolysis unit. If so, the energy storage unit does not supply power to the hydrogen electrolysis unit, and after the real-time capacity reaches the second threshold, the energy storage unit supplies power to the microgrid. If not, the energy storage unit supplies power to the hydrogen electrolysis unit. At the same time, after the real-time capacity reaches the second threshold, the energy storage unit supplies power to the microgrid.

[0030] As a further optimization, the real-time load information of the microgrid and the voltage threshold under different load information are obtained, and when the wind and solar power output supplies power to the microgrid and / or the energy storage unit supplies power to the microgrid, it is determined whether the real-time voltage of the microgrid reaches the voltage threshold, and the microgrid is dispatched and controlled to supply power to the load user, or to the load user or the public grid according to the judgment result, which means:

[0031] Setting a voltage threshold of the microgrid, the voltage threshold comprising a first voltage threshold and a second voltage threshold, the first voltage threshold being less than the second voltage threshold;

[0032] When the wind and solar power output supplies power to the microgrid, it is determined whether the real-time voltage of the microgrid reaches the first voltage threshold. If it does not reach the first voltage threshold, the microgrid is dispatched and controlled to supply power to the load user.

[0033] When the energy storage unit supplies power to the microgrid, and when the wind and solar power output supplies power to the microgrid and the energy storage unit supplies power to the microgrid, it is determined whether the real-time voltage of the microgrid reaches the first voltage threshold. If it does not reach the first voltage threshold, the microgrid is dispatched and controlled to supply power to the load users. When the first voltage threshold is reached and the second voltage threshold is not reached, the dispatch control increases the power supply voltage of the microgrid to the load users. When the second voltage threshold is reached, the microgrid is dispatched and controlled to supply power to the load users and the public grid.

[0034] As a further optimization, when the real-time voltage of the microgrid does not reach the first voltage threshold, the microgrid is dispatched to supply power to the load user, and its power supply voltage is 80% of the user's rated voltage. At this time, the user's electricity is in a low-voltage working state;

[0035] When the real-time voltage of the microgrid reaches the first voltage threshold and does not reach the second voltage threshold, the dispatch control increases the power supply voltage of the microgrid to the load user, which means: increasing the power supply voltage of the microgrid to the user's rated voltage. At this time, the user's electricity consumption is in a normal voltage working state.

[0036] On the other hand, the present invention also provides a dispatching control system based on wind-solar-storage-powered hydrogen production, which is applied to the dispatching control method based on wind-solar-storage-powered hydrogen production, including:

[0037] A mapping unit, used to establish a mapping relationship table of wind and solar power output values ​​corresponding to different meteorological conditions;

[0038] The first judgment unit is used to obtain real-time meteorological conditions, and judge whether the cumulative wind and solar power output value in the wind and solar power output time period reaches the preset threshold value of the electrolytic hydrogen production unit, and dispatch and control the cumulative wind and solar power output value to supply power to the electrolytic hydrogen production unit, or to supply power to the electrolytic hydrogen production unit and the energy storage unit, or to supply power to the electrolytic hydrogen production unit, the energy storage unit and the microgrid according to the judgment result;

[0039] The second judgment unit is used to obtain the state of charge of the energy storage unit, and obtain the capacity threshold of the energy storage unit based on the state of charge, and when the wind and solar power output supplies power to the energy storage unit, judge whether the real-time capacity of the energy storage unit reaches the capacity threshold, and dispatch and control the energy storage unit to supply power to the electrolytic hydrogen production unit, or to supply power to the electrolytic hydrogen production unit and the microgrid according to the judgment result;

[0040] The third judgment unit is used to obtain the real-time load information of the microgrid and the voltage threshold under different load information, and to judge whether the real-time voltage of the microgrid reaches the voltage threshold when the wind and solar power output supplies power to the microgrid and / or the energy storage unit supplies power to the microgrid, and to dispatch and control the microgrid to supply power to the load users, or to supply power to the load users and the public power grid according to the judgment result.

[0041] The beneficial effects of the present invention are as follows: through the above-mentioned dispatching and control method and system for hydrogen production based on wind, solar, energy storage and power supply, firstly, the power supply dispatching and control of the electrolytic hydrogen production unit can be accurately completed based on the actual meteorological conditions and preset threshold conditions of the wind, solar, energy storage and power station; secondly, the power supply control process to the electrolytic hydrogen production unit and the microgrid can be accurately completed based on the charge state and capacity threshold of the energy storage unit; finally, the present invention will also reasonably arrange the power supply to users in the wind, solar, energy storage and power station and the grid connection process to the public power grid based on the load conditions and voltage threshold of the microgrid self-distributed by the wind, solar, energy storage and power station; the present invention directly connects wind, solar, energy storage and power generation to the public power grid due to the high or low electricity price to the public power grid, but first considers the balance of power supply and power consumption within the wind, solar, energy storage and power station, and then considers connecting the remaining electricity to the public power grid through the microgrid, and finally considers connecting to the public power grid to obtain power supply benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a flow chart of the dispatching control method for hydrogen production based on wind, solar, power storage and electricity generation in Embodiment 1 of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Example

[0045] This embodiment provides a dispatching control method for hydrogen production based on wind, solar, storage and power supply. Figure 1 , wherein the method comprises the following steps:

[0046] S1. Establish a mapping relationship table of wind and solar power output values ​​corresponding to different meteorological conditions;

[0047] S2. Obtain real-time meteorological conditions, and determine whether the cumulative wind and solar power output value during the wind and solar power output time period reaches the preset threshold value of the electrolytic hydrogen production unit, and dispatch and control the cumulative wind and solar power output value to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the energy storage unit, or to the electrolytic hydrogen production unit, the energy storage unit and the microgrid according to the determination result;

[0048] S3. Obtain the state of charge of the energy storage unit, and based on the state of charge, obtain the capacity threshold of the energy storage unit, and when the wind and solar power output supplies power to the energy storage unit, determine whether the real-time capacity of the energy storage unit reaches the capacity threshold, and dispatch and control the energy storage unit to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the microgrid according to the determination result;

[0049] S4. Obtain the real-time load information of the microgrid and the voltage threshold under different load information, and when the wind and solar power output supplies power to the microgrid and / or the energy storage unit supplies power to the microgrid, determine whether the real-time voltage of the microgrid reaches the voltage threshold, and dispatch and control the microgrid to supply power to the load users, or to supply power to the load users and the public power grid based on the judgment result.

[0050] In the above method, since the meteorological environment of the wind-solar-storage power station will directly affect whether wind power generation and photovoltaic power generation are started and the power generation efficiency, this embodiment will first establish the wind-solar output value corresponding to the meteorological conditions. Under normal circumstances, meteorological conditions, such as wind force, wind direction, light intensity and other parameters, are mostly continuously changing even when they are stable during the day. The wind power generation equipment cannot frequently change the input voltage when it is electrolyzed to produce hydrogen for power supply after power generation, which will bring a heavy workload to the inverter and booster. Therefore, when establishing the mapping relationship, in order to improve the power generation efficiency and reduce the negative pressure of the inverter and booster during wind power generation, and the workload of the booster during photovoltaic power generation, the wind-solar output time period can be divided, and then the corresponding meteorological conditions are obtained in each time period, and then the wind-solar output value corresponding to each meteorological condition is obtained. Therefore, in this embodiment, after obtaining the real-time meteorological conditions, and judging whether the cumulative wind-solar output value in the wind-solar output time period reaches the preset threshold of the electrolysis hydrogen production unit, it can also include:

[0051] When the wind and solar power generation starts, the meteorological conditions at that time are obtained, and the wind and solar power generation time period is divided into multiple sub-time periods according to the meteorological conditions at that time;

[0052] Obtain the meteorological conditions at the start time node and the middle time node of each sub-time period, and determine whether the change in the meteorological conditions at these two consecutive time nodes in any sub-time period exceeds the specified value. If not, obtain the meteorological conditions at the end time node of the current sub-time period, and obtain the wind and solar power output value at this time to perform the wind and solar power output of the next sub-time period;

[0053] If it exceeds, the meteorological conditions of the end time node of the current sub-time period are obtained, and the sub-time periods of the subsequent wind and solar power output time period are re-divided based on the meteorological conditions at this time.

[0054] Here, the division of sub-time periods cannot be based on the experience of the staff, but needs to be combined with the historical meteorological conditions of the wind, solar and storage power stations, as well as the daytime meteorological changes, in order to obtain high-efficiency power generation requirements that meet the wind and solar power generation requirements.

[0055] It should be pointed out that the electrolytic hydrogen production unit is generally an electrolyzer. Wind power generation and photovoltaic power generation in a wind, solar and power storage station can power different electrolyzers separately, or they can power one electrolyzer together. Each electrolyzer requires a different working voltage based on the water supply, reagent dosage and the electrolyzer's own parameters. In order to accurately determine whether wind and solar power generation only powers the electrolyzer, or powers the electrolyzer and battery at the same time, or powers the electrolyzer, battery and microgrid at the same time, it is necessary to set the corresponding preset threshold. Therefore, in this embodiment, the preset threshold of the electrolytic hydrogen production unit may include a first preset threshold and a second preset threshold; here, it is necessary to ensure that the first preset threshold is less than the second preset threshold.

[0056] Therefore, the method of judging whether the cumulative wind-solar output value in the wind-solar output time period reaches the preset threshold value of the electrolytic hydrogen production unit, and dispatching and controlling the cumulative wind-solar output value to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the energy storage unit, or to the electrolytic hydrogen production unit, the energy storage unit and the microgrid according to the judgment result, may include:

[0057] When the wind power generation equipment and the photovoltaic power generation equipment simultaneously supply power to the same electrolytic hydrogen production tank, the electrolytic hydrogen production tank is used as an electrolytic hydrogen production unit, and a preset threshold value of the electrolytic hydrogen production tank is obtained;

[0058] Starting from the first sub-time period of the wind and solar power output time period to the end time node of each subsequent sub-time period, it is judged in turn whether the cumulative wind and solar power output value reaches the first preset threshold value of the electrolytic hydrogen production unit. If it is not reached, the wind power generation equipment and the photovoltaic power generation equipment are controlled and dispatched to only supply power to the electrolytic hydrogen production unit;

[0059] When the accumulated wind and solar power output reaches the first preset threshold of the electrolytic hydrogen production unit, the sub-time period at this time is obtained, and starting from the start time node of the next sub-time period, to the subsequent sub-time periods, it is judged in turn whether the accumulated wind and solar power output reaches the second preset threshold of the electrolytic hydrogen production unit. If not, the wind power generation equipment and photovoltaic power generation equipment are controlled and dispatched to supply power to the electrolytic hydrogen production unit and the energy storage unit;

[0060] When the cumulative wind and solar power output reaches the second preset threshold of the hydrogen electrolysis unit, the sub-time period at this time is obtained, and starting from the start time node of the next sub-time period, until the subsequent sub-time period, the wind power generation equipment and photovoltaic power generation equipment are controlled and dispatched to supply power to the hydrogen electrolysis unit, the energy storage unit and the microgrid.

[0061] Therefore, this embodiment compares the wind and solar power output in each sub-time period with the corresponding preset threshold value, thereby accurately completing the power supply scheduling control process for the electrolyzer, battery and microgrid.

[0062] It should be pointed out that when the wind power generation equipment and the photovoltaic power generation equipment supply power to different hydrogen electrolysis cells respectively, all the different hydrogen electrolysis cells are regarded as hydrogen electrolysis units, and the preset threshold value of each hydrogen electrolysis cell is obtained.

[0063] Therefore, when the wind power generation equipment supplies power to the hydrogen electrolysis unit, the power supply voltage of the hydrogen electrolysis unit and the output voltage of the wind power generation equipment are obtained, and the output voltage is rectified and boosted so that the output voltage of the wind power generation equipment after boosting is equal to the power supply voltage, and then the hydrogen electrolysis unit is powered;

[0064] When the photovoltaic power generation equipment supplies power to the electrolytic hydrogen production unit, the output voltage of the photovoltaic power generation equipment is obtained and boosted so that the output voltage of the photovoltaic power generation equipment after boosting is equal to the power supply voltage, and then the electrolytic hydrogen production unit is powered.

[0065] It should be pointed out that the energy storage unit is generally a battery or a battery pack. For a battery or a battery pack, its state of charge has two extreme values, namely 0 and 1. When the state of charge is equal to 0, it means that the battery is fully discharged. When the state of charge is equal to 1, it means that the battery is fully charged. If the battery power is too small, it may not reach the line loss when supplying power to the microgrid. If it is fully charged and then supplies power to the microgrid or the electrolysis hydrogen production unit, it may not be adapted to the electrolysis hydrogen production process. Therefore, in this embodiment, the state of charge is set to 0.8. Therefore, the acquisition of the state of charge of the energy storage unit, and the acquisition of the capacity threshold of the energy storage unit based on the state of charge, and when the wind and solar power output supplies power to the energy storage unit, it is determined whether the real-time capacity of the energy storage unit reaches the capacity threshold, and the energy storage unit is dispatched and controlled to supply power to the electrolysis hydrogen production unit, or to the electrolysis hydrogen production unit and the microgrid according to the judgment result. It means:

[0066] After the dispatching control accumulates the wind and solar power output to supply power to the hydrogen electrolysis unit and the energy storage unit, the charge state of the energy storage unit is obtained;

[0067] Setting a capacity threshold of the energy storage unit when the state of charge is 0.8, the capacity threshold including a first capacity threshold and a second capacity threshold, the first capacity threshold being less than the second capacity threshold;

[0068] Determine whether the real-time capacity of the energy storage unit has reached a first capacity threshold. If not, the energy storage unit is dispatched and controlled not to supply power to the hydrogen electrolysis unit and the microgrid. When the first capacity threshold is reached, determine whether the accumulated wind and solar power output is supplying power to the hydrogen electrolysis unit. If so, the energy storage unit does not supply power to the hydrogen electrolysis unit, and after the real-time capacity reaches the second threshold, the energy storage unit supplies power to the microgrid. If not, the energy storage unit supplies power to the hydrogen electrolysis unit. At the same time, after the real-time capacity reaches the second threshold, the energy storage unit supplies power to the microgrid.

[0069] As for the microgrid of the wind, solar, and storage power station itself in this embodiment, its main function is to supply power to users inside the power station. When there is a relatively sufficient supply of electricity, it will be considered to be incorporated into the public power grid. When the microgrid is incorporated into the public power grid, the first consideration is to relieve the power consumption pressure of surrounding users for the public grid, and then consider the benefits brought by the high and low electricity prices. Therefore, in this embodiment, the real-time load information of the microgrid and the voltage threshold under different load information are obtained, and when the wind and solar power are supplied to the microgrid and / or the energy storage unit supplies power to the microgrid, it is determined whether the real-time voltage of the microgrid reaches the voltage threshold, and the microgrid is dispatched and controlled to supply power to the load users, or to the load users or the public power grid according to the judgment result, which means:

[0070] Setting a voltage threshold of the microgrid, the voltage threshold comprising a first voltage threshold and a second voltage threshold, the first voltage threshold being less than the second voltage threshold;

[0071] When the wind and solar power output supplies power to the microgrid, it is determined whether the real-time voltage of the microgrid reaches the first voltage threshold. If it does not reach the first voltage threshold, the microgrid is dispatched and controlled to supply power to the load user.

[0072] When the energy storage unit supplies power to the microgrid, and when the wind and solar power output supplies power to the microgrid and the energy storage unit supplies power to the microgrid, it is determined whether the real-time voltage of the microgrid reaches the first voltage threshold. If it does not reach the first voltage threshold, the microgrid is dispatched and controlled to supply power to the load users. When the first voltage threshold is reached and the second voltage threshold is not reached, the dispatch control increases the power supply voltage of the microgrid to the load users. When the second voltage threshold is reached, the microgrid is dispatched and controlled to supply power to the load users and the public grid.

[0073] Generally, when the real-time voltage of the microgrid does not reach the first voltage threshold, the microgrid is dispatched to supply power to the load user, and its power supply voltage is 80% of the user's rated voltage. At this time, the user's electricity is in a low-voltage working state;

[0074] When the real-time voltage of the microgrid reaches the first voltage threshold and does not reach the second voltage threshold, the dispatch control increases the power supply voltage of the microgrid to the load user, which means: increasing the power supply voltage of the microgrid to the user's rated voltage. At this time, the user's electricity consumption is in a normal voltage working state.

[0075] Example

[0076] On the basis of the first embodiment, this embodiment provides a dispatching control system based on wind-solar-storage-powered hydrogen production, the system comprising:

[0077] A mapping unit, used to establish a mapping relationship table of wind and solar power output values ​​corresponding to different meteorological conditions;

[0078] The first judgment unit is used to obtain real-time meteorological conditions, and judge whether the cumulative wind and solar power output value in the wind and solar power output time period reaches the preset threshold value of the electrolytic hydrogen production unit, and dispatch and control the cumulative wind and solar power output value to supply power to the electrolytic hydrogen production unit, or to supply power to the electrolytic hydrogen production unit and the energy storage unit, or to supply power to the electrolytic hydrogen production unit, the energy storage unit and the microgrid according to the judgment result;

[0079] The second judgment unit is used to obtain the state of charge of the energy storage unit, and obtain the capacity threshold of the energy storage unit based on the state of charge, and when the wind and solar power output supplies power to the energy storage unit, judge whether the real-time capacity of the energy storage unit reaches the capacity threshold, and dispatch and control the energy storage unit to supply power to the electrolytic hydrogen production unit, or to supply power to the electrolytic hydrogen production unit and the microgrid according to the judgment result;

[0080] The third judgment unit is used to obtain the real-time load information of the microgrid and the voltage threshold under different load information, and to judge whether the real-time voltage of the microgrid reaches the voltage threshold when the wind and solar power output supplies power to the microgrid and / or the energy storage unit supplies power to the microgrid, and to dispatch and control the microgrid to supply power to the load users, or to supply power to the load users and the public power grid according to the judgment result.

[0081] According to the description of the first embodiment, the application scenario and implementation principle of this embodiment are consistent with those of the first embodiment, and thus will not be described in detail.

[0082] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dispatching and control method for hydrogen production based on wind, solar, and power storage, characterized in that: The steps include: Establish a mapping relationship table of wind and solar power output values ​​corresponding to different meteorological conditions; Obtain real-time meteorological conditions, and determine whether the cumulative wind and solar power output value during the wind and solar power output time period reaches the preset threshold value of the electrolytic hydrogen production unit, and dispatch and control the cumulative wind and solar power output value to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the energy storage unit, or to the electrolytic hydrogen production unit, the energy storage unit and the microgrid according to the determination result; Obtain the state of charge of the energy storage unit, and based on the state of charge, obtain the capacity threshold of the energy storage unit, and when the wind and solar power output supplies power to the energy storage unit, determine whether the real-time capacity of the energy storage unit reaches the capacity threshold, and dispatch and control the energy storage unit to supply power to the electrolytic hydrogen production unit, or to the microgrid, or to both the electrolytic hydrogen production unit and the microgrid according to the determination result; The acquiring of the state of charge of the energy storage unit, acquiring the capacity threshold of the energy storage unit based on the state of charge, and judging whether the real-time capacity of the energy storage unit reaches the capacity threshold when the wind and solar power output supplies power to the energy storage unit, and dispatching and controlling the energy storage unit to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the microgrid according to the judgment result, refers to: After the dispatching control accumulates the wind and solar power output to supply power to the hydrogen electrolysis unit and the energy storage unit, the charge state of the energy storage unit is obtained; Setting a capacity threshold of the energy storage unit when the state of charge is 0.8, the capacity threshold including a first capacity threshold and a second capacity threshold, the first capacity threshold being less than the second capacity threshold; Determine whether the real-time capacity of the energy storage unit reaches a first capacity threshold. If not, the energy storage unit is dispatched and controlled not to supply power to the hydrogen electrolysis unit and the microgrid. When the first capacity threshold is reached, determine whether the accumulated wind and solar power output is supplying power to the hydrogen electrolysis unit. If so, the energy storage unit does not supply power to the hydrogen electrolysis unit, and after the real-time capacity reaches a second threshold, the energy storage unit supplies power to the microgrid. If not, the energy storage unit supplies power to the hydrogen electrolysis unit. At the same time, after the real-time capacity reaches the second threshold, the energy storage unit supplies power to the microgrid. Obtain the real-time load information of the microgrid and the voltage threshold under different load information, and when the wind and solar power output supplies power to the microgrid and / or the energy storage unit supplies power to the microgrid, determine whether the real-time voltage of the microgrid reaches the voltage threshold, and dispatch and control the microgrid to supply power to the load users, or to the load users and the public power grid based on the judgment result.

2. The dispatching control method for hydrogen production based on wind-solar-storage power supply according to claim 1 is characterized in that: After obtaining the real-time meteorological conditions, and judging whether the accumulated wind and solar power output value in the wind and solar power output time period reaches the preset threshold value of the electrolytic hydrogen production unit, it also includes: When the wind and solar power generation starts, the meteorological conditions at that time are obtained, and the wind and solar power generation time period is divided into multiple sub-time periods according to the meteorological conditions at that time; Obtain the meteorological conditions at the start time node and the middle time node of each sub-time period, and determine whether the change in the meteorological conditions at these two consecutive time nodes in any sub-time period exceeds the specified value. If not, obtain the meteorological conditions at the end time node of the current sub-time period, and obtain the wind and solar power output value at this time to perform the wind and solar power output of the next sub-time period; If it exceeds, the meteorological conditions of the end time node of the current sub-time period are obtained, and the sub-time periods of the subsequent wind and solar power output time period are re-divided based on the meteorological conditions at this time.

3. The dispatching control method based on wind-solar-powered electricity storage and hydrogen production according to claim 2 is characterized in that: The preset threshold of the electrolytic hydrogen production unit includes a first preset threshold and a second preset threshold; The first preset threshold is smaller than the second preset threshold.

4. The dispatching control method for hydrogen production based on wind-solar-storage power supply according to claim 3 is characterized in that: The determining whether the accumulated wind-solar output value in the wind-solar output time period reaches a preset threshold value of the electrolytic hydrogen production unit, and dispatching and controlling the accumulated wind-solar output value to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the energy storage unit, or to the electrolytic hydrogen production unit, the energy storage unit and the microgrid according to the determination result, includes: When the wind power generation equipment and the photovoltaic power generation equipment simultaneously supply power to the same electrolytic hydrogen production tank, the electrolytic hydrogen production tank is used as an electrolytic hydrogen production unit, and a preset threshold value of the electrolytic hydrogen production tank is obtained; Starting from the first sub-time period of the wind and solar power output time period to the end time node of each subsequent sub-time period, it is judged in turn whether the cumulative wind and solar power output value reaches the first preset threshold value of the electrolytic hydrogen production unit. If it is not reached, the wind power generation equipment and the photovoltaic power generation equipment are controlled and dispatched to only supply power to the electrolytic hydrogen production unit; When the accumulated wind and solar power output reaches the first preset threshold value of the electrolytic hydrogen production unit, the sub-time period at this time is obtained, and starting from the start time node of the next sub-time period, to the subsequent sub-time periods, it is judged in turn whether the accumulated wind and solar power output reaches the second preset threshold value of the electrolytic hydrogen production unit. If not, the wind power generation equipment and photovoltaic power generation equipment are controlled and dispatched to supply power to the electrolytic hydrogen production unit and the energy storage unit; When the cumulative wind and solar power output reaches the second preset threshold of the hydrogen electrolysis unit, the sub-time period at this time is obtained, and starting from the start time node of the next sub-time period, until the subsequent sub-time period, the wind power generation equipment and photovoltaic power generation equipment are controlled and dispatched to supply power to the hydrogen electrolysis unit, the energy storage unit and the microgrid.

5. The dispatching control method for hydrogen production based on wind, solar, power storage and electricity supply according to claim 4 is characterized in that: When the wind power generation equipment and the photovoltaic power generation equipment supply power to different hydrogen electrolysis cells respectively, all the different hydrogen electrolysis cells are used as hydrogen electrolysis units, and a preset threshold value of each hydrogen electrolysis cell is obtained.

6. The dispatching control method based on wind-solar-storage-powered hydrogen production according to claim 4 or 5 is characterized in that: When the wind power generation equipment supplies power to the hydrogen electrolysis unit, the power supply voltage of the hydrogen electrolysis unit and the output voltage of the wind power generation equipment are obtained, and the output voltage is rectified and boosted so that the output voltage of the wind power generation equipment after boosting is equal to the power supply voltage, and then power is supplied to the hydrogen electrolysis unit; When the photovoltaic power generation equipment supplies power to the electrolytic hydrogen production unit, the output voltage of the photovoltaic power generation equipment is obtained and boosted so that the output voltage of the photovoltaic power generation equipment after boosting is equal to the power supply voltage, and then the electrolytic hydrogen production unit is powered.

7. The dispatching control method based on wind-solar-storage-powered hydrogen production according to claim 1 is characterized in that: The acquisition of real-time load information of the microgrid and voltage thresholds under different load information, and when the wind and solar power output supplies power to the microgrid and / or the energy storage unit supplies power to the microgrid, judging whether the real-time voltage of the microgrid reaches the voltage threshold, and dispatching and controlling the microgrid to supply power to the load user, or to the load user or the public grid according to the judgment result, refers to: Setting a voltage threshold of the microgrid, the voltage threshold comprising a first voltage threshold and a second voltage threshold, the first voltage threshold being less than the second voltage threshold; When the wind and solar power output supplies power to the microgrid, it is determined whether the real-time voltage of the microgrid reaches the first voltage threshold. If it does not reach the first voltage threshold, the microgrid is dispatched and controlled to supply power to the load user. When the energy storage unit supplies power to the microgrid, and when the wind and solar power output supplies power to the microgrid and the energy storage unit supplies power to the microgrid, it is determined whether the real-time voltage of the microgrid reaches the first voltage threshold. If it does not reach the first voltage threshold, the microgrid is dispatched and controlled to supply power to the load users. When the first voltage threshold is reached and the second voltage threshold is not reached, the dispatch control increases the power supply voltage of the microgrid to the load users. When the second voltage threshold is reached, the microgrid is dispatched and controlled to supply power to the load users and the public grid.

8. The dispatching control method for hydrogen production based on wind, solar, power storage and electricity supply according to claim 7 is characterized in that: When the real-time voltage of the microgrid does not reach the first voltage threshold, the microgrid is dispatched and controlled to supply power to the load user, and its power supply voltage is 80% of the user's rated voltage. At this time, the user's electricity is in a low-voltage working state; When the real-time voltage of the microgrid reaches the first voltage threshold and does not reach the second voltage threshold, the dispatch control increases the power supply voltage of the microgrid to the load user, which means: increasing the power supply voltage of the microgrid to the user's rated voltage. At this time, the user's electricity consumption is in a normal voltage working state.

9. A dispatching control system for hydrogen production based on wind, solar, and power storage, applied to the dispatching control method for hydrogen production based on wind, solar, and power storage as claimed in any one of claims 1 to 8, characterized in that: include: A mapping unit, used to establish a mapping relationship table of wind and solar power output values ​​corresponding to different meteorological conditions; The first judgment unit is used to obtain real-time meteorological conditions, and judge whether the cumulative wind and solar power output value in the wind and solar power output time period reaches the preset threshold value of the electrolytic hydrogen production unit, and dispatch and control the cumulative wind and solar power output value to supply power to the electrolytic hydrogen production unit, or to supply power to the electrolytic hydrogen production unit and the energy storage unit, or to supply power to the electrolytic hydrogen production unit, the energy storage unit and the microgrid according to the judgment result; The second judgment unit is used to obtain the state of charge of the energy storage unit, and obtain the capacity threshold of the energy storage unit based on the state of charge, and when the wind and solar power output supplies power to the energy storage unit, judge whether the real-time capacity of the energy storage unit reaches the capacity threshold, and dispatch and control the energy storage unit to supply power to the electrolytic hydrogen production unit, or to the microgrid, or to the electrolytic hydrogen production unit and the microgrid according to the judgment result; The acquiring of the state of charge of the energy storage unit, acquiring the capacity threshold of the energy storage unit based on the state of charge, and judging whether the real-time capacity of the energy storage unit reaches the capacity threshold when the wind and solar power output supplies power to the energy storage unit, and dispatching and controlling the energy storage unit to supply power to the electrolytic hydrogen production unit, or to the electrolytic hydrogen production unit and the microgrid according to the judgment result, refers to: After the dispatching control accumulates the wind and solar power output to supply power to the hydrogen electrolysis unit and the energy storage unit, the charge state of the energy storage unit is obtained; Setting a capacity threshold of the energy storage unit when the state of charge is 0.8, the capacity threshold including a first capacity threshold and a second capacity threshold, the first capacity threshold being less than the second capacity threshold; Determine whether the real-time capacity of the energy storage unit reaches a first capacity threshold. If not, the energy storage unit is dispatched and controlled not to supply power to the hydrogen electrolysis unit and the microgrid. When the first capacity threshold is reached, determine whether the accumulated wind and solar power output is supplying power to the hydrogen electrolysis unit. If so, the energy storage unit does not supply power to the hydrogen electrolysis unit, and after the real-time capacity reaches a second threshold, the energy storage unit supplies power to the microgrid. If not, the energy storage unit supplies power to the hydrogen electrolysis unit. At the same time, after the real-time capacity reaches the second threshold, the energy storage unit supplies power to the microgrid. The third judgment unit is used to obtain the real-time load information of the microgrid and the voltage threshold under different load information, and to judge whether the real-time voltage of the microgrid reaches the voltage threshold when the wind and solar power output supplies power to the microgrid and / or the energy storage unit supplies power to the microgrid, and to dispatch and control the microgrid to supply power to the load users, or to supply power to the load users and the public power grid according to the judgment result.

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