A wind, solar, hydrogen and storage integrated green power system

Abstract

The present invention relates to the field of electric energy storage technology, and specifically to a wind, solar, and hydrogen storage integrated green electricity system. When the amount of electricity generated by the wind power generation module and the photovoltaic power generation module is greater than the local real-time electricity demand, the power distribution control module is used to distribute the electric energy generated by the wind power generation module and the photovoltaic power generation module into local electricity, grid electricity, and reserve electricity according to the local electricity consumption situation. Local electricity is directly supplied to local users. Grid electricity is directly connected to the power grid. The reserve electricity is supplied to the electrolysis hydrogen production module for hydrogen production, and the produced hydrogen is stored by the hydrogen storage module. When the amount of electricity generated by the wind power generation module and the photovoltaic power generation module is less than the local real-time electricity demand, the power distribution control module is used to control the hydrogen fuel cell module to generate electricity using the hydrogen stored in the hydrogen storage module according to the local electricity consumption situation to supplement local electricity. It can reduce the loss of electricity while realizing local electricity reserves and ensuring local electricity consumption.

Description

Technical Field

[0001] The present invention relates to the field of electric energy storage technology, and in particular to a wind, solar, and hydrogen storage integrated green electricity system. Background Art

[0002] At present, the use of clean and renewable energy (such as wind power and photovoltaic power generation) is becoming more and more widespread. In actual use, if the power generated by local wind power and photovoltaic power generation exceeds the local power demand, there will be excess power, resulting in a large amount of power being wasted. In order to avoid the waste of power, it is possible to consider putting the excess power online for use in other regions, but a large amount of power loss is inevitable during the transmission process, and there is also a huge waste of energy.

[0003] Affected by seasonal and climate changes, when the energy enters a low period, the electricity generated by wind power generation and photovoltaic power generation cannot meet the local electricity demand, and it is necessary to transmit electricity from other places to the local area through the power grid to supplement local electricity consumption. However, a large amount of electricity is inevitably lost again during the transmission process, which causes repeated loss of electricity.

[0004] In view of this, this application is hereby filed. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated green electricity system of wind, solar power and hydrogen storage, which can further reduce the loss of electricity while realizing local electricity reserves and ensuring normal local electricity consumption, realize reasonable interaction with the power grid, help reduce the burden on the power grid, and have positive significance for improving the utilization rate of electricity.

[0006] The embodiment of the present invention is achieved as follows:

[0007] A wind-solar-hydrogen-storage integrated green electricity system comprises: a wind power generation module, a photovoltaic power generation module, an electrolysis hydrogen production module, a hydrogen storage module, a hydrogen fuel cell module and a power distribution control module.

[0008] When the amount of electricity generated by the wind power generation module and the photovoltaic power generation module is greater than the local real-time electricity demand, the power distribution control module is used to distribute the electricity generated by the wind power generation module and the photovoltaic power generation module into local electricity, grid electricity and reserve electricity according to the local electricity consumption situation. Local electricity is directly supplied to local users. Grid electricity is directly connected to the grid. Reserve electricity is supplied to the electrolytic hydrogen production module for hydrogen production, and the produced hydrogen is stored by the hydrogen storage module.

[0009] When the amount of electricity generated by the wind power generation module and the photovoltaic power generation module is less than the local real-time electricity demand, the power distribution control module is used to control the hydrogen fuel cell module to generate electricity using the hydrogen stored in the hydrogen storage module according to the local electricity consumption situation to supplement local electricity consumption.

[0010] Furthermore, when determining the reserve power, the power distribution control module includes the following steps:

[0011] S1. Create a reference database, which is used to store sample data. The sample data is established for each household, and the sample data includes historical electricity consumption data and historical population data.

[0012] S2. Predict the future electricity consumption data of each household based on the sample data and real-time population data of each household, and use this to determine the future electricity consumption data of the local area.

[0013] S3. Predict the future power generation of the wind power generation module and the photovoltaic power generation module based on meteorological data, and determine the future power consumption gap based on the future power generation and local future power consumption data.

[0014] S4. Determine the reserve electricity consumption based on the future electricity shortage.

[0015] Furthermore, historical population data and real-time population data are obtained through the following steps:

[0016] D1. Collect local population thermal distribution data.

[0017] D2. Determine the actual occupied portals in each residential building as the evaluation portals.

[0018] D3. When the population thermal distribution data shows that someone has entered the elevator, the thermal point at which the person enters the elevator will be used as the evaluation object. When the population thermal distribution data shows that the person enters the elevator, the timing will start, and the duration from entering the elevator to leaving the elevator will be counted. The floor reached by the person will be determined based on the duration and the elevator speed of the residential building, and the specific evaluation portal entered by the person will be determined based on the population thermal distribution data.

[0019] D4. Count the number of people in each assessment portal to obtain historical population data / real-time population data.

[0020] Furthermore, in D2, the electricity meter data of each portal is used to determine whether it is actually occupied.

[0021] Furthermore, in D3, when determining the floor reached by the assessment object, auxiliary judgment is performed in combination with the distribution of the assessment portals in the residential building.

[0022] Furthermore, in D3, if the elevator in the residential building has a function of recording the floor when the door is opened, the floor information recorded by the elevator is used as the floor reached by the evaluation object.

[0023] Furthermore, in D3, if a signal abnormality appears at the thermal point of the assessment object after the assessment object enters the elevator room, the signal abnormality duration from the start of the signal abnormality to the signal returning to normal after the assessment object enters the assessment portal is counted, and the floor reached by the assessment object is determined based on the signal abnormality duration and the elevator running speed of the residential building, and the specific assessment portal entered by the assessment object is determined based on the population thermal distribution data after recovery to normal.

[0024] Furthermore, after determining the duration of the signal anomaly, the time difference between the durations of the signal anomaly between the same batch of evaluation objects is also determined, and the floors reached by each evaluation object are determined in combination with the distribution of the evaluation portals in the residential building.

[0025] Among them, the same batch of assessment objects refers to: several assessment objects that enter the elevator at the same time and whose total number is less than the elevator's load capacity.

[0026] Furthermore, the time difference between the signal abnormality durations of the two evaluation objects is taken as a reference duration, and the floor difference between the two evaluation objects is determined according to the elevator running speed of the residential building and the reference duration. The floors reached by the two evaluation objects are determined according to the floor difference and the distribution of the evaluation portals in the residential building.

[0027] The beneficial effects of the technical solution of the embodiment of the present invention include:

[0028] The integrated wind, solar, hydrogen and storage green electricity system provided by the embodiment of the present invention can effectively improve the prediction accuracy of reserve electricity consumption, while ensuring sufficient reserve electricity consumption, also avoiding excessive reserves.

[0029] In general, the integrated wind, solar, and hydrogen storage green electricity system provided by the embodiment of the present invention can further reduce the loss of electricity while realizing local electricity reserves and ensuring normal local electricity consumption, realizes reasonable interaction with the power grid, helps to reduce the burden on the power grid, and has positive significance for improving the utilization rate of electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic diagram of the operation mode of the wind-solar-hydrogen-storage integrated green electricity system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] 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.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be understood that the "system", "module" and the like used in the present invention are a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0035] As shown in this specification and claims, unless the context clearly provides an example, the words "a", "an", "the", etc. do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0036] The flowcharts used in this specification are used to illustrate the operations performed by the system according to the embodiments of this specification. It is understood that the operations of each step are not necessarily performed precisely in order. On the contrary, the steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or more operations can be removed from these processes.

[0037] In order to solve the problems existing in the prior art, this embodiment provides an integrated wind, solar, hydrogen and storage green electricity system, which includes: a wind power generation module, a photovoltaic power generation module, an electrolysis hydrogen production module, a hydrogen storage module, a hydrogen fuel cell module and a power distribution control module.

[0038] When the amount of electricity generated by the wind power generation module and the photovoltaic power generation module is greater than the local real-time electricity demand, the power distribution control module is used to distribute the electricity generated by the wind power generation module and the photovoltaic power generation module into local electricity, grid electricity and reserve electricity according to the local electricity consumption situation.

[0039] Among them, the local electricity is directly supplied to local users. The grid electricity is directly connected to the grid to realize the external transmission of electricity. The reserve electricity is supplied to the electrolysis hydrogen production module for electrolysis of water to produce hydrogen, and the produced hydrogen is stored in the hydrogen storage module. Figure 1 shown.

[0040] As the seasons change, wind and solar energy will change accordingly. When the amount of electricity generated by the wind power generation module and the photovoltaic power generation module is less than the local real-time electricity demand, the power distribution control module is used to control the hydrogen fuel cell module to generate electricity using the hydrogen stored in the hydrogen storage module according to the local electricity consumption situation to supplement the local electricity consumption. Figure 1 shown.

[0041] Through this design, when the electricity generated by the wind power generation module and the photovoltaic power generation module is sufficient, the amount of electricity required in the future is predicted based on the local electricity consumption situation, and this is used as the basis for storing backup electricity, so as to achieve local supplementation of local electricity consumption in seasons when wind power generation and photovoltaic power generation are relatively scarce.

[0042] In this way, it is possible to avoid long-distance power transmission from other places and avoid the loss of electricity during long-distance transmission. This technical solution is particularly suitable for islands, plateaus and other areas. On the one hand, it reduces the loss of electricity during long-distance transmission, and on the other hand, it improves the stability of local power supply and reduces the impact of power consumption risks caused by external power supply line failures.

[0043] Specifically, during use, the most suitable power plan can be selected by comparing the usage losses of multiple power plans. The purpose of this technical solution is to provide an optional power plan to adapt to different usage environments, especially for islands, plateaus and other regions.

[0044] In general, the integrated wind, solar, and hydrogen storage green electricity system provided in this embodiment can further reduce the loss of electricity while realizing local electricity reserves and ensuring normal local electricity consumption, realize reasonable interaction with the power grid, help reduce the burden on the power grid, and has positive significance for improving the utilization rate of electricity.

[0045] It should be noted that when determining the amount of reserve electricity, the reserve electricity for a period of time in the future can be determined based on actual needs, and the length of the "period of time in the future" can be flexibly adjusted.

[0046] In addition, in order to ensure local electricity consumption in the future, if the amount of electricity reserved for power consumption is increased as much as possible, the local hydrogen reserves will increase, which will increase the difficulty of local hydrogen reserve safety risk management. At the same time, increasing the amount of electricity reserved for power consumption as much as possible will lead to a reduction in the amount of electricity transmitted through the power grid. For other areas that mainly rely on purchasing electricity from other places, the tension in electricity consumption will increase. Therefore, it is very important to control the reserve electricity consumption within an appropriate range. On the one hand, this reduces the difficulty of local hydrogen storage and safety management risks, and on the other hand, it is also conducive to alleviating the pressure on electricity consumption in other places.

[0047] Since the electricity consumption of each household is related to the number of people in the household, generally speaking, the more people there are in a household, the more electricity it consumes.

[0048] In order to more reasonably confirm the reserve power consumption, the power distribution control module includes the following steps when determining the reserve power consumption:

[0049] S1. Create a reference database, which is used to store sample data. Sample data is created for each household, and includes historical electricity consumption data and historical population data. In other words, each household has its corresponding sample data. In the sample data, the historical electricity consumption data is matched with the population of the user at the corresponding time.

[0050] S2. Predict the future electricity consumption data of each household based on the sample data and real-time population data of each household, and use this to determine the local future electricity consumption data. Since the change in the number of users will lead to changes in their electricity consumption to a certain extent, based on the difference between the current number of people (real-time population data) and the previous number of people (historical population data in the sample data), the historical electricity consumption data is corrected to obtain the future electricity consumption data of each household corresponding to the current number of people (real-time population data). By summing up the future electricity consumption data of all houses (each household), the local future electricity consumption data can be obtained.

[0051] S3. Predict the future power generation of the wind power generation module and the photovoltaic power generation module based on meteorological data, and determine the future power consumption gap based on the future power generation and local future power consumption data.

[0052] S4. Determine the reserve electricity consumption based on the future electricity shortage.

[0053] Through the above design, the prediction accuracy of reserve electricity can be effectively improved, ensuring that the reserve electricity is sufficient while avoiding excessive reserves.

[0054] It should be noted that when revising historical electricity consumption data based on the difference between the current number of people (real-time population data) and the previous number of people (historical population data in the sample data), specific correction plans and standards can be flexibly formulated and implemented according to local actual conditions, and this plan does not make specific restrictions.

[0055] In this embodiment, historical population data and real-time population data are obtained through the following steps:

[0056] D1. Collect local population thermal distribution data. Population thermal distribution data can be obtained through mobile phone positioning data, but is not limited to this.

[0057] D2. Determine the portals in each residential building that are actually occupied as evaluation portals. The meter data of each portal can be used to determine whether it is actually occupied. If the meter data shows normal electricity consumption, it means that someone is living there. If the meter data shows no electricity consumption or the electricity consumption is lower than the set threshold, it means that no one is living there. The specific judgment criteria and thresholds can be flexibly set according to the actual situation.

[0058] D3. When the population thermal distribution data shows that someone has entered the elevator room (for example, when the positioning signal shows that someone has entered the elevator room), the thermal point of entering the elevator room is used as the evaluation object. When the population thermal distribution data shows that the evaluation object has entered the elevator, the timing starts, and the duration from entering the elevator to leaving the elevator is counted. The floor reached by the evaluation object is determined based on this duration and the elevator running speed of the residential building (which can be obtained through the property). Finally, combined with the door number entered by the evaluation object shown by the population thermal distribution data, that is, the door number corresponding to the last location of the positioning point, the specific evaluation portal entered by the evaluation object can be determined. For example, if the duration from entering the elevator to leaving the elevator for an evaluation object is 30s, according to the elevator running speed of the residential building, this time corresponds to going up to the 14th floor, and the last positioning point indicates that the evaluation object has entered room 3, then it can be preliminarily determined that the evaluation object has entered the portal 14-3.

[0059] D4. Count the number of people in each assessment portal to obtain historical population data / real-time population data.

[0060] Through the above design, on the basis of the two-dimensional position of the population thermal distribution data, the confirmation of the assessment portal actually entered by each assessment object is realized, so as to facilitate the counting of the number of people in each assessment portal, thereby facilitating more accurate confirmation of the reserve power.

[0061] It should be noted that if the number of occupants of a residential building exceeds the threshold number of occupants (which can be flexibly set according to actual conditions), the above D1~D4 may not be executed, but the overall electricity consumption of the residential building may be directly predicted, which can be evaluated in combination with the historical electricity consumption data of the residential building.

[0062] The above steps D1 to D4 are more suitable for residential buildings where the number of occupants is less than or equal to the threshold number of occupants, that is, residential buildings with a small number of occupants, so as to facilitate more reasonable planning of electricity consumption.

[0063] It should be noted that the above method can be used not only to determine real-time population data, but also to determine historical population data, because the "real-time population data" currently collected by this method will eventually become the "historical population data" in the future.

[0064] Furthermore, in D3, when determining the floor reached by the evaluation object, auxiliary judgment is made in combination with the distribution of evaluation portals in the residential building. For example, if it is initially judged that the evaluation object has reached the 5th floor and entered Room 3 on the 5th floor, but Room 3 on the 5th floor is not an evaluation portal where someone lives, it means that the judgment of the floor may be wrong. Otherwise, it means that the judgment is correct. For residential buildings with a small number of residents, the judgment accuracy can be effectively improved.

[0065] In particular, in D3, if the elevator in the residential building has the function of recording the floor when the door is opened, the floor information recorded by the elevator can be used as the floor reached by the evaluation object, without the need to perform floor judgment through the above D3.

[0066] Furthermore, in D3, if the thermal point of the evaluation object has a signal abnormality after entering the elevator room (for example, the signal in the elevator room and the elevator is poor), the signal abnormality duration from the start of the signal abnormality to the signal returning to normal after the evaluation object enters the evaluation portal is counted (usually the signal returns to normal after returning to one's room), the floor reached by the evaluation object is determined based on the signal abnormality duration and the elevator running speed of the residential building, and the specific evaluation portal entered by the evaluation object is determined based on the population thermal distribution data after recovery to normal.

[0067] In order to improve the judgment accuracy, after determining the duration of signal anomaly, the time difference between the signal anomaly durations between the same batch of evaluation objects is also determined, and the floor reached by each evaluation object is determined in combination with the distribution of the evaluation portal in the residential building.

[0068] The same batch of assessment objects refers to: a number of assessment objects who enter the elevator at the same time and whose total number is less than the elevator's load capacity. The same batch of assessment objects take the same elevator.

[0069] Specifically, the time difference between the signal abnormality durations of the two evaluation objects is used as the reference duration, the floor difference between the two evaluation objects is determined according to the elevator running speed of the residential building and the reference duration, and the floors reached by the two evaluation objects are determined according to the floor difference and the distribution of the evaluation portals in the residential building.

[0070] For example, if two people (two evaluation objects) enter the elevator at the same time and their thermal points show abnormal signals, the two people will be identified as the same batch of evaluation objects. If the first person's signal abnormality duration (the duration from the abnormal signal when entering the elevator to the signal returning to normal after returning home) is 40s, and the second person's signal abnormality duration is 55s, the time difference between the two people's signal abnormality duration is 15s. If in this residential building, 15s corresponds to the time it takes for the elevator to run 6 floors, it means that the floor difference between the two people is 6 floors. If the first person is initially determined to have entered Room 2 on the 18th floor, and the second person is initially determined to have entered Room 1 on the 24th floor, and Room 2 on the 18th floor and Room 1 on the 24th floor of the residential building happen to be the evaluation portals where people live, then it means that the identification is correct.

[0071] Through the above design, the results can be effectively checked against each other and the judgment accuracy can be improved.

[0072] To sum up, the integrated wind, solar, and hydrogen storage green electricity system provided in the embodiment of the present invention can further reduce the loss of electricity while realizing local electricity reserves and ensuring normal local electricity consumption, realizes reasonable interaction with the power grid, helps to reduce the burden on the power grid, and has positive significance for improving the utilization rate of electricity.

[0073] The above description is only a preferred embodiment of the present invention and is 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 wind-solar-hydrogen-storage integrated green electricity system, characterized in that: include: Wind power generation module, photovoltaic power generation module, electrolysis hydrogen production module, hydrogen storage module, hydrogen fuel cell module and power distribution control module; When the amount of electricity generated by the wind power generation module and the photovoltaic power generation module is greater than the local real-time electricity demand, the power distribution control module is used to distribute the electric energy generated by the wind power generation module and the photovoltaic power generation module into local electricity, grid electricity and reserve electricity according to the local electricity consumption situation; the local electricity is directly supplied to local users; the grid electricity is directly connected to the grid; the reserve electricity is supplied to the electrolytic hydrogen production module for hydrogen production, and the produced hydrogen is stored by the hydrogen storage module; When the amount of electricity generated by the wind power generation module and the photovoltaic power generation module is less than the local real-time electricity demand, the power distribution control module is used to control the hydrogen fuel cell module to generate electricity using the hydrogen stored in the hydrogen storage module according to the local electricity consumption situation to supplement local electricity consumption; When determining the reserve power, the power distribution control module includes the following steps: S1. Create a reference database, which is used to store sample data; the sample data is established separately for each household, and the sample data includes historical electricity consumption data and historical population data; S2. predicting the future electricity consumption data of each household based on the sample data and real-time population data of each household, and determining the future electricity consumption data of the local area; S3, predicting the future power generation of the wind power generation module and the photovoltaic power generation module according to the meteorological data, and determining the future power consumption gap according to the future power generation and the local future power consumption data; S4. Determine the reserve electricity according to the future electricity gap; The historical population data and the real-time population data are obtained through the following steps: D1. Collect local population thermal distribution data; D2. Determine the actual occupied portals in each residential building as the evaluation portals; D3. When the population thermal distribution data shows that a person has entered the elevator room, the thermal point of entering the elevator room is taken as the evaluation object. When the population thermal distribution data shows that the evaluation object enters the elevator, the timing is started, and the duration from entering the elevator to leaving the elevator is counted. The floor reached by the evaluation object is determined according to the duration and the elevator running speed of the residential building, and the evaluation portal specifically entered by the evaluation object is determined according to the population thermal distribution data; D4. Counting the number of people in each evaluation portal, thereby obtaining the historical population data and the real-time population data; In D3, if a signal abnormality appears at the thermal point of the assessment object after the assessment object enters the elevator room, the signal abnormality duration from the start of the signal abnormality to the signal returning to normal after the assessment object enters the assessment portal is counted, and the floor reached by the assessment object is determined based on the signal abnormality duration and the elevator running speed of the residential building, and the assessment portal that the assessment object specifically enters is determined based on the population thermal distribution data after recovery to normal.

2. The wind-solar-hydrogen-storage integrated green electricity system according to claim 1 is characterized in that: In D2, the electricity meter data of each door is used to determine whether it is actually occupied.

3. The wind-solar-hydrogen-storage integrated green electricity system according to claim 1 is characterized in that: In D3, when determining the floor reached by the assessment object, auxiliary judgment is performed in combination with the distribution of the assessment portals in the residential building.

4. The wind-solar-hydrogen-storage integrated green electricity system according to claim 1 is characterized in that: In D3, if the elevator of the residential building has a function of recording the floor when the door is opened, the floor information recorded by the elevator is used as the floor reached by the evaluation object.

5. The wind-solar-hydrogen-storage integrated green electricity system according to claim 1 is characterized in that: After determining the signal abnormality duration, simultaneously determining the time difference between the signal abnormality durations of the same batch of the evaluation objects, and determining the floor reached by each of the evaluation objects in combination with the distribution of the evaluation portals in the residential building; The same batch of evaluation objects refers to: a number of evaluation objects that enter the elevator at the same time and whose total number is less than the elevator's load capacity.

6. The wind-solar-hydrogen-storage integrated green electricity system according to claim 5 is characterized in that: The time difference between the signal abnormality durations of the two evaluation objects is taken as a reference duration, and the floor difference between the two evaluation objects is determined according to the elevator running speed of the residential building and the reference duration. The floors reached by each of the two evaluation objects are determined according to the floor difference and the distribution of the evaluation portals in the residential building.

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