Electric energy storage system based on complementation of solar energy and wind energy

Abstract

The invention discloses an electric energy storage system based on complementation of solar energy and wind energy, which relates to the field of electric energy management and comprises a storage center in communication connection with a power generation module, an electric power acquisition module, an electric power analysis module and an electric power management module. The power generation module is used for supplying power to a target area; the electric power acquisition module is used for performing data acquisition on a corresponding electric power supply process to obtain corresponding electric energy data; the electric power analysis module is used for performing electric power analysis according to the collected electric energy data and generating a corresponding control strategy according to an analysis result; the power management module is used for adjusting a corresponding power supply process according to a control strategy; according to the invention, efficient power supply and intelligent management of the target area are realized.

Description

Technical Field

[0001] The present invention relates to the field of electric energy management, and in particular to an electric energy storage system based on the complementarity of solar energy and wind energy. Background Art

[0002] With the intensification of the energy crisis and the improvement of environmental protection awareness, the development and utilization of renewable energy has become a hot topic of global concern. As two major clean energy sources, solar energy and wind energy each have the characteristics of intermittency and instability; Compared with the existing technology, the instability of wind and solar energy leads to unstable energy supply of existing energy storage systems, and the unstable electric energy has a great impact on the power grid and cannot be connected to the grid, which may cause fluctuations and unreliability of the power system. This is a problem we need to solve. For this reason, we provide an energy storage system based on the complementarity of solar energy and wind energy. Summary of the invention

[0003] The object of the present invention is to provide an electric energy storage system based on the complementarity of solar energy and wind energy.

[0004] The object of the present invention can be achieved by the following technical solutions: an electric energy storage system based on the complementarity of solar energy and wind energy, comprising a storage center, wherein the storage center is communicatively connected with a power generation module, a power collection module, a power analysis module and a power management module; The power generation module is used to supply power to the target area; The power collection module is used to collect data on the corresponding power supply process to obtain corresponding power data; The power analysis module is used to perform power analysis based on the collected power data and generate corresponding control strategies based on the analysis results; The power management module is used to adjust the corresponding power supply process according to the control strategy.

[0005] Furthermore, the process of the power generation module being used to supply power to the target area includes: The power generation module is provided with a solar energy conversion unit and a wind energy conversion unit; The solar energy conversion unit is composed of several groups of photovoltaic panels, which are used to convert solar energy in the target area into electrical energy; The wind energy conversion unit is composed of a plurality of wind turbines, and is used to convert wind energy in the target area into electrical energy; The converted electrical energy is fed back to the target area through the power supply line for power replenishment.

[0006] Furthermore, the power collection module collects data on the corresponding power supply process, and the process of obtaining corresponding electric energy data includes: The power collection module is provided with a plurality of data collection nodes and data monitoring nodes; the data collection nodes are used to collect data from photovoltaic panels and wind turbines in the target area, obtain corresponding power generation data and equipment status data, and also to collect environmental data in the target area; the data monitoring nodes are used to obtain storage data and load requirements of corresponding energy storage devices in real time; The obtained power generation data, environmental data, equipment status data, storage data and load demand are summarized to obtain the corresponding electric energy data, and then uploaded to the storage center for storage.

[0007] Furthermore, the process of the power analysis module for performing power analysis based on the collected power data includes: Based on the collected power load data, a corresponding unit load mean is obtained, a two-dimensional rectangular coordinate system with respect to the unit load mean is constructed, and the corresponding unit load mean is mapped into the two-dimensional rectangular coordinate system to obtain a corresponding load mean curve; Set the monitoring period, perform load forecasting based on the load mean curve, and obtain the load mean change curve within the next monitoring period; The total power load in the corresponding monitoring period is obtained according to the load mean change curve in the next monitoring period, and the estimated load demand is set in combination with the total power load and the load mean change curve.

[0008] Furthermore, the process of generating a corresponding control strategy based on the analysis results includes: Read the collected power generation data, environmental data, and equipment status data, and build a corresponding wind and solar power generation model in combination with digital twin technology; Obtain environmental data within the next monitoring cycle; use the corresponding environmental data and expected load demand as constraints, input them into the wind and solar power generation model to perform power supply simulation, and obtain the optimal equipment status data within the corresponding monitoring cycle; Furthermore, the equipment status of the wind turbines and photovoltaic panels in the power generation module is adjusted based on the obtained optimal equipment status data within the corresponding monitoring period, so that the load supply can meet the demand under the ideal state; After the adjustment is completed, obtain the real-time power generation data and obtain the corresponding actual load supply capacity based on it; Calculate the deviation between the obtained load supply capacity and the estimated load demand to obtain the corresponding load deviation; A deviation threshold is set, the load deviation is compared with the deviation threshold, and a corresponding control strategy is adopted according to the comparison result, wherein the control strategy includes a first control strategy and a second control strategy.

[0009] Furthermore, the process of adjusting the corresponding power supply process according to the first control strategy includes: When the first control strategy is received, the collected storage data is read, the load capacity of the corresponding energy storage device is obtained based on the obtained storage data, and the obtained load capacity is compared with the load deviation; If the load deviation is lower than the load capacity, the power supply line between the corresponding energy storage device and the target area is connected, and the control index is set based on the load capacity of the energy storage device, and then the corresponding energy storage device is connected to the corresponding power supply process according to the control index; If the load deviation is not lower than the load capacity, the corresponding power-consuming facilities that can excite the controllable load are obtained, and the power load of the power-consuming facilities that can excite the controllable load is reduced.

[0010] Furthermore, the process of adjusting the corresponding power supply process according to the second control strategy includes: When the second control strategy is received, the corresponding load margin is obtained based on the load deviation, and the stored data is read at the same time to obtain the real-time electric energy storage ratio of the corresponding energy storage device, which is recorded as D0, and compared with the first electric energy standard D1 and the second electric energy standard D2 respectively; If D0<D1, the load margin is stored in the corresponding energy storage device based on the first constraint condition; If D1≤D0≤D2, it indicates that the energy storage ratio of the corresponding energy storage device is in a normal power state, then the load margin is stored in the corresponding energy storage device based on the second constraint condition; If D0>D2, it indicates that the energy storage ratio of the corresponding energy storage device is at a high level of power, then the corresponding power-consuming facilities that can excite and control the load are obtained, and the power load of the power-consuming facilities that can excite and control the load is increased.

[0011] Furthermore, the process of obtaining the second constraint condition includes: Read the storage data corresponding to the corresponding energy storage device, and based on it, obtain the load required for the corresponding energy storage device to reach a high power state, and calibrate it as the storage demand; The obtained storage demand, actual load supply capacity, estimated load demand and load margin are marked as F0, F1, F2, and F3 respectively; Comparing the storage demand with the corresponding load margin, and determining the corresponding second constraint condition according to the comparison result; If F0≤F3, the power generation module supplies power to the corresponding target area and the corresponding energy storage device at the same time, and the corresponding energy storage device does not participate in the power supply process of the target area; then the corresponding second constraint condition is F1-F2>F0>0; If F0>F3, the power generation module will simultaneously supply electric energy to the corresponding target area and the corresponding energy storage device, and based on the control index, the corresponding energy storage device will be connected to the power supply process of the target area, and the load capacity of the corresponding energy storage device in the corresponding power supply process will be obtained, and it will be recorded as F4. The corresponding second constraint condition is F1-F0+F4>F2 and F0>F4, that is, on the premise of meeting the load demand of the target area, it is also necessary to ensure that the charging rate of the energy storage device is greater than the discharging rate.

[0012] Compared with the prior art, the beneficial effects of the present invention are: by collecting data on the power replenishment process, performing power analysis based on the collected power data, and generating corresponding control strategies, the power replenishment process is adjusted based on the control strategies to ensure a stable supply of electricity. At the same time, it is also beneficial to improve the power stability and energy utilization efficiency of the target area when energy fluctuates, and meet the continuous electricity needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0014] like Figure 1 As shown, an electric energy storage system based on the complementarity of solar energy and wind energy includes a storage center, and the storage center is communicatively connected with a power generation module, a power collection module, a power analysis module and a power management module; The power generation module is used to supply power to the target area; The power collection module is used to collect data on the corresponding power supply process to obtain corresponding power data; The power analysis module is used to perform power analysis based on the collected power data and generate corresponding control strategies based on the analysis results; The power management module is used to adjust the corresponding power supply process according to the control strategy; It should be further explained that, in the specific implementation process, the process of the power generation module supplying power to the energy storage device in the target area includes: The power generation module is provided with a solar energy conversion unit and a wind energy conversion unit; The solar energy conversion unit is composed of several groups of photovoltaic panels, which are used to convert solar energy in the target area into electrical energy; The wind energy conversion unit is composed of a plurality of wind turbines, and is used to convert wind energy in the target area into electrical energy; The converted electrical energy is fed back to the target area through the power supply line for power replenishment.

[0015] It should be further explained that, in the specific implementation process, the power collection module collects data on the corresponding power supply process, and the process of obtaining the corresponding electric energy data includes: A plurality of data acquisition nodes and data monitoring nodes are arranged in the power acquisition module, and the data acquisition nodes and the data monitoring nodes are mutually associated; The data collection nodes are deployed in the solar energy conversion unit and the wind energy conversion unit according to actual needs; they are used to collect data from the photovoltaic panels and wind turbines in the target area to obtain the corresponding power generation data and equipment status data. They are also used to collect environmental data in the target area; The data monitoring node is deployed in the energy storage device in the target area according to actual needs, and is used to obtain the storage data and load demand of the corresponding energy storage device in real time; wherein the energy storage device includes but is not limited to lithium-ion energy storage batteries, lead-acid energy storage batteries and supercapacitor energy storage; The obtained power generation data, environmental data, equipment status data, storage data and load demand are summarized to obtain the corresponding electric energy data, and then uploaded to the storage center for storage.

[0016] It should be further explained that, in the specific implementation process, the process of the power analysis module for performing power analysis based on the collected power data includes: Read the collected power load data, mark the obtained user load data, and record it as Yk, where Yk represents the power load data corresponding to the k-th power facility in the target area, k>0 and k is an integer; Based on the collected power load data, the corresponding unit load mean is obtained, and the obtained unit load mean is marked as Dt, where: ; Where Dt represents the unit load mean at time t, t>0 and t is an integer; a1, ..., ak represents the loss coefficient corresponding to the power load data Y1, ..., Yk; Construct a two-dimensional rectangular coordinate system of time with respect to the unit load mean, and map the corresponding unit load mean into the two-dimensional rectangular coordinate system to obtain a corresponding load mean curve; Set the monitoring cycle, obtain the load mean curves in several historical monitoring cycles based on the load mean curve, and perform load forecasting based on the linear regression algorithm to obtain the load mean change curve in the next monitoring cycle; Then, the total power load in the corresponding monitoring period is obtained according to the load mean change curve in the next monitoring period, and the estimated load demand is set in combination with the total power load and the load mean change curve; It should be further explained that, in the specific implementation process, the process of generating corresponding control strategies based on the analysis results includes: Read the collected power generation data, environmental data, and equipment status data, and build a corresponding wind-solar power generation model in combination with digital twin technology, wherein the wind-solar power generation model is used to simulate the power supply process of the power generation module; Obtain environmental data for the next monitoring period from the meteorological data published by the meteorological bureau in the target area; The corresponding environmental data and expected load demand are used as constraints and input into the wind and solar power generation model to simulate power supply and obtain the optimal equipment status data within the corresponding monitoring period; Furthermore, the equipment status of the wind turbines and photovoltaic panels in the power generation module is adjusted based on the obtained optimal equipment status data during the corresponding monitoring period, so that the load supply can meet the demand under the ideal state; for example, the proportion of the power generation capacity of the wind turbines and photovoltaic panels, the equipment angle, etc. are adjusted; After the adjustment is completed, obtain the real-time power generation data and obtain the corresponding actual load supply capacity based on it; Calculate the deviation between the obtained load supply capacity and the estimated load demand to obtain the corresponding load deviation; Setting a deviation threshold, comparing the load deviation with the deviation threshold, and adopting a corresponding control strategy according to the comparison result; If the load deviation is lower than the deviation threshold, indicating that the load supply capacity of the target area does not meet the load demand, a first control strategy is generated; If the load deviation is not lower than the deviation threshold, indicating that the load supply capacity of the target area meets the load demand, a second control strategy is generated.

[0017] It should be further explained that, in the specific implementation process, the process in which the power management module is used to adjust the corresponding power supply process according to the control strategy includes: When the first control strategy is received, the collected storage data is read, wherein the storage data includes storage capacity and electric energy storage ratio; Obtaining the load capacity of the corresponding energy storage device based on the obtained storage data, and comparing the obtained load capacity with the load deviation; If the load deviation is lower than the load capacity, the power supply line between the corresponding energy storage device and the target area is connected, and the control index is set based on the load capacity of the energy storage device, and the control index includes the load supply, charging and discharging efficiency and power balance of the energy storage device; and then the corresponding energy storage device is connected to the corresponding power supply process according to the control index; If the load deviation is not lower than the load capacity, the equipment information of all power facilities in the target area is obtained, and the equipment information is screened to obtain the corresponding power facilities that can excite and control the load, and the power load of the power facilities that can excite and control the load is reduced. If the load deviation is still not lower than the load capacity, the low-priority power facilities in the target area are connected and disconnected based on the pre-set priority until the load deviation is higher than the load capacity; It should be further explained that, in the specific implementation process, an embodiment of the present invention further includes: After receiving the first control strategy, the power management module provides feedback to the power analysis module. After receiving the corresponding feedback, the power analysis module obtains real-time environmental data, simulates based on the real-time environmental data, obtains corresponding optimal equipment status data, and adjusts the current wind turbines and photovoltaic panels based on the data. After the adjustment is completed, the latest load deviation is obtained, and the current control strategy is adjusted according to the latest load deviation. When receiving the second control strategy; obtaining the corresponding load margin based on the load deviation, reading the stored data at the same time, obtaining the real-time electric energy storage ratio of the corresponding energy storage device, and recording it as D0, and comparing it with the first electric energy standard D1 and the second electric energy standard D2 respectively; If D0<D1, it indicates that the energy storage ratio of the corresponding energy storage device is in a low-power state, then the load margin is stored in the corresponding energy storage device based on the first constraint condition, wherein the first constraint condition includes the limit range of charging current, charging voltage, and charging temperature when the energy storage device stores energy in a low-power state; If D1≤D0≤D2, it indicates that the energy storage ratio of the corresponding energy storage device is in a normal power state, then the load margin is stored in the corresponding energy storage device based on the second constraint condition; It should be further explained that, in a specific implementation process, the process of obtaining the second constraint condition includes: Read the storage data corresponding to the corresponding energy storage device, and based on it, obtain the load required for the corresponding energy storage device to reach a high power state, and calibrate it as the storage demand; The obtained storage demand, actual load supply capacity, estimated load demand and load margin are marked as F0, F1, F2, and F3 respectively; Comparing the storage demand with the corresponding load margin, and determining the corresponding second constraint condition according to the comparison result; If F0≤F3, the power generation module supplies power to the corresponding target area and the corresponding energy storage device at the same time, and the corresponding energy storage device does not participate in the power supply process of the target area; then the corresponding second constraint condition is F1-F2>F0>0; If F0>F3, the power generation module will supply power to the corresponding target area and the corresponding energy storage device at the same time, and connect the corresponding energy storage device to the power supply process of the target area based on the control index, obtain the load capacity of the corresponding energy storage device in the corresponding power supply process, and record it as F4, then the corresponding second constraint condition is F1-F0+F4>F2 and F0>F4, that is, on the premise of meeting the load demand of the target area, it is also necessary to ensure that the charging rate of the energy storage device is greater than the discharging rate; If D0>D2, it indicates that the energy storage ratio of the corresponding energy storage device is at a high level of power, then the corresponding power-consuming facilities that can excite and control the load are obtained, the power load of the power-consuming facilities that can excite and control the load is increased, and the load surplus is consumed. After the adjustment is completed, if there is still load surplus, it will be discarded; It should be further explained that, in the specific implementation process, an inverter is provided between the power generation module and the target area by default, which is used to convert the direct current generated by the power generation module into alternating current and used for power supply to the target area.

[0018] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. An electric energy storage system based on the complementarity of solar energy and wind energy, characterized in that: It includes a storage center, which is communicatively connected to a power generation module, a power collection module, a power analysis module, and a power management module; The power generation module is used to supply power to the target area; The power collection module is used to collect data on the corresponding power supply process to obtain corresponding power data; The power analysis module is used to perform power analysis based on the collected power data and generate corresponding control strategies based on the analysis results; The power management module is used to adjust the corresponding power supply process according to the control strategy.

2. The electric energy storage system based on the complementarity of solar energy and wind energy according to claim 1 is characterized in that: The process of the power generation module for supplying power to the target area includes: The power generation module is provided with a solar energy conversion unit and a wind energy conversion unit; The solar energy conversion unit is composed of several groups of photovoltaic panels, which are used to convert solar energy in the target area into electrical energy; The wind energy conversion unit is composed of a plurality of wind turbines, and is used to convert wind energy in the target area into electrical energy; The converted electrical energy is fed back to the target area through the power supply line for power replenishment.

3. The electric energy storage system based on the complementarity of solar energy and wind energy according to claim 2 is characterized in that: The power collection module collects data on the corresponding power supply process, and the process of obtaining corresponding electric energy data includes: The power collection module is provided with a plurality of data collection nodes and data monitoring nodes; the data collection nodes are used to collect data from photovoltaic panels and wind turbines in the target area, obtain corresponding power generation data and equipment status data, and also to collect environmental data in the target area; the data monitoring nodes are used to obtain storage data and load requirements of corresponding energy storage devices in real time; The obtained power generation data, environmental data, equipment status data, storage data and load demand are summarized to obtain the corresponding electric energy data, and then uploaded to the storage center for storage.

4. The electric energy storage system based on the complementarity of solar energy and wind energy according to claim 3 is characterized in that: The process of the power analysis module for performing power analysis based on the collected power data includes: Based on the collected power load data, a corresponding unit load mean is obtained, a two-dimensional rectangular coordinate system with respect to the unit load mean is constructed, and the corresponding unit load mean is mapped into the two-dimensional rectangular coordinate system to obtain a corresponding load mean curve; Set the monitoring period, perform load forecasting based on the load mean curve, and obtain the load mean change curve within the next monitoring period; The total power load in the corresponding monitoring period is obtained according to the load mean change curve in the next monitoring period, and the estimated load demand is set in combination with the total power load and the load mean change curve.

5. The electric energy storage system based on the complementarity of solar energy and wind energy according to claim 4 is characterized in that: The process of generating corresponding control strategies based on the analysis results includes: Read the collected power generation data, environmental data, and equipment status data, and build a corresponding wind and solar power generation model in combination with digital twin technology; Obtain environmental data within the next monitoring cycle; use the corresponding environmental data and expected load demand as constraints, input them into the wind and solar power generation model to perform power supply simulation, and obtain the optimal equipment status data within the corresponding monitoring cycle; Furthermore, the equipment status of the wind turbines and photovoltaic panels in the power generation module is adjusted based on the obtained optimal equipment status data within the corresponding monitoring period, so that the load supply can meet the demand under the ideal state; After the adjustment is completed, obtain the real-time power generation data and obtain the corresponding actual load supply capacity based on it; Calculate the deviation between the obtained load supply capacity and the estimated load demand to obtain the corresponding load deviation; A deviation threshold is set, the load deviation is compared with the deviation threshold, and a corresponding control strategy is adopted according to the comparison result, wherein the control strategy includes a first control strategy and a second control strategy.

6. The electric energy storage system based on the complementation of solar energy and wind energy according to claim 5 is characterized in that: The process of adjusting the corresponding power supply process according to the first control strategy includes: When the first control strategy is received, the collected storage data is read, the load capacity of the corresponding energy storage device is obtained based on the obtained storage data, and the obtained load capacity is compared with the load deviation; If the load deviation is lower than the load capacity, the power supply line between the corresponding energy storage device and the target area is connected, and the control index is set based on the load capacity of the energy storage device, and then the corresponding energy storage device is connected to the corresponding power supply process according to the control index; If the load deviation is not lower than the load capacity, the corresponding power-consuming facilities that can excite the controllable load are obtained, and the power load of the power-consuming facilities that can excite the controllable load is reduced.

7. The electric energy storage system based on the complementation of solar energy and wind energy according to claim 5 is characterized in that: The process of adjusting the corresponding power supply process according to the second control strategy includes: When the second control strategy is received, the corresponding load margin is obtained based on the load deviation, and the stored data is read at the same time to obtain the real-time electric energy storage ratio of the corresponding energy storage device, which is recorded as D0, and compared with the first electric energy standard D1 and the second electric energy standard D2 respectively; If D0<D1, the load margin is stored in the corresponding energy storage device based on the first constraint condition; If D1≤D0≤D2, it indicates that the energy storage ratio of the corresponding energy storage device is in a normal power state, then the load margin is stored in the corresponding energy storage device based on the second constraint condition; If D0>D2, it indicates that the energy storage ratio of the corresponding energy storage device is at a high level of power, then the corresponding power-consuming facilities that can excite and control the load are obtained, and the power load of the power-consuming facilities that can excite and control the load is increased.

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