Multifunctional distributed energy storage charging system

Abstract

The invention relates to the technical field of distributed energy storage charging, and discloses a multifunctional distributed energy storage charging system, which comprises an electric energy storage module, an energy management module and an early warning management module, and is characterized in that the electric energy storage module comprises a photovoltaic energy storage unit and a photovoltaic energy monitoring unit; the energy management module comprises an energy dispatching management analysis unit and an equipment energy detection unit, and the early warning management module dispatches workers of the distributed energy storage charging system needing early warning to overhaul the distributed energy storage charging system needing early warning. According to the system, the generated redundant electric quantity is dispatched, analyzed and calculated or energy is dispatched when the electric quantity of the current distributed energy storage charging system is insufficient, so that full utilization of the electric energy is guaranteed, the access is unique in the dispatching process, interference caused by other inputs is avoided, and the safety is guaranteed; and meanwhile, the component temperature is detected and analyzed in the electric quantity outputting process of the distributed energy storage charging system and the energy dispatching process of the energy dispatching management analysis unit, so that the safety of power transmission is ensured.

Description

Technical Field

[0001] This invention relates to the field of distributed energy storage and charging technology, specifically to a multifunctional distributed energy storage and charging system. Background Technology

[0002] Distributed energy storage systems are currently a hot topic in power system research and engineering. Distributed power sources in these systems often exhibit volatility and intermittency. To improve renewable energy absorption rates, maintain microgrid stability, and extend the lifespan of energy storage devices, researching safe and efficient charging methods is essential. The integration of renewable energy with energy storage in new distribution networks is becoming a necessary trend. Extensive research has theoretically and practically confirmed the feasibility of distributed energy storage systems in distribution and user-side applications. Currently, the peak periods for photovoltaic power generation and electricity consumption do not coincide, and energy utilization and security are low, for which there are no good solutions in existing technologies. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a multifunctional distributed energy storage and charging system, which has advantages such as the ability to schedule redundant power, thus solving the aforementioned technical problems.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional distributed energy storage and charging system, comprising an energy storage module, an energy management module, and an early warning management module;

[0007] The energy storage module includes a photovoltaic energy storage unit and a photovoltaic energy monitoring unit. The photovoltaic energy storage unit is used to store photovoltaic energy and record the stored and generated energy in all distributed energy storage and charging systems. The photovoltaic energy monitoring unit is used to detect the stored and generated energy in each distributed energy storage and charging system and send the abnormal signal to the early warning management module after detecting an abnormality.

[0008] The energy management module includes an energy scheduling management and analysis unit and an equipment energy detection unit;

[0009] When the current distributed energy storage and charging system is fully charged, the energy scheduling management and analysis unit performs scheduling analysis and calculation on the redundant power generated by it, and performs energy scheduling. When the current distributed energy storage and charging system is underpowered, the energy scheduling management and analysis unit performs energy scheduling on the current distributed energy storage and charging system.

[0010] The device energy detection unit detects and analyzes the component temperatures during the energy dispatch process based on the output power of the distributed energy storage charging system and the energy dispatch management analysis unit, and sends the obtained temperature analysis results to the early warning management module.

[0011] The early warning management module determines whether to issue an early warning based on the temperature analysis results of the equipment energy detection unit. For distributed energy storage and charging systems that require an early warning, the dispatching staff will conduct maintenance.

[0012] The early warning management module also performs early warning analysis based on abnormal signals in the energy storage module. For distributed energy storage charging systems that are judged to be abnormal, the module will issue a warning to the vehicle owner when the new energy vehicle is charging, and dispatch staff to carry out maintenance.

[0013] As a preferred embodiment of the present invention, the photovoltaic energy storage unit stores and records the specific expressions for the electrical energy stored and generated in all distributed energy storage and charging systems as follows:

[0014]

[0015] in, This represents the dataset stored in the photovoltaic energy storage unit. Don't mean Time number Distributed energy storage and charging systems store electrical energy. , Time number Distributed energy storage and charging systems store electrical energy. , Time number Distributed energy storage and charging systems store electrical energy. They represent Time number The generated electricity of the distributed energy storage and charging system , Time number The generated electricity of the distributed energy storage and charging system , Time number The generated electricity from the distributed energy storage and charging system.

[0016] As a preferred embodiment of the present invention, the specific steps for the photovoltaic energy monitoring unit to detect the stored electrical energy and generated electrical energy of each distributed energy storage and charging system are as follows:

[0017] Step A1: Compare the stored energy of the current distributed energy storage and charging system with the total stored energy of the distributed energy storage and charging system. If the call threshold is met, invoke the energy management module to perform energy scheduling. If the call threshold is not met, proceed to step A2.

[0018] The specific expression for the call threshold is as follows:

[0019]

[0020]

[0021]

[0022] in, express Time number Distributed energy storage and charging systems store electrical energy. Indicates number The maximum value of stored electrical energy in a distributed energy storage and charging system. express Time number The demand for distributed energy storage and charging systems;

[0023] Step A2: Calculate the increment of generated electrical energy in the distributed energy storage and charging system, and send the increments of generated electrical energy in the distributed energy storage and charging system that are lower than the average value to the early warning management module.

[0024] As a preferred embodiment of the present invention, the specific expression for calculating the increment of generated electrical energy in the distributed energy storage charging system in step A2 is as follows:

[0025]

[0026] in, Indicates number The incremental power generated by the distributed energy storage and charging system express Time number The generated electricity of the distributed energy storage charging system express Time number The generated electricity of the distributed energy storage charging system Indicates a time interval.

[0027] As a preferred embodiment of the present invention, the specific expression for sending the incremental power generated in the distributed energy storage and charging system with an increment lower than the average value to the early warning management module in step A2 is as follows:

[0028]

[0029] in, Indicates number The warning value for the increase in power generation, Indicates number The incremental power generated by the distributed energy storage and charging system Indicates number The incremental power generated by the distributed energy storage and charging system Indicates the number except for Summing up the incremental power generated by all distributed energy storage and charging systems other than those mentioned above, when... It is sent to the early warning management module in time. If the warning is not sent to the early warning management module, it will not be sent.

[0030] As a preferred embodiment of the present invention, the energy scheduling management performs scheduling analysis and calculation on the redundant power generated when the current distributed energy storage charging system is fully charged, and the specific steps for energy scheduling are as follows:

[0031] Step B1: Determine For distributed energy storage charging systems with storage values ​​below the rated value, if none exist, energy dispatch to the grid is performed; if so, step B2 is executed.

[0032] Step B2: Select the distributed energy storage and charging system that meets the lowest criteria in Step B1 as the scheduled system, occupy the scheduling channel of the scheduled system, and jump to B1.

[0033] As a preferred embodiment of the present invention, the specific steps of the energy dispatch management and analysis unit in performing energy dispatch on the current distributed energy storage and charging system when the current distributed energy storage and charging system has insufficient power are as follows:

[0034] Step C1: Select The distributed energy storage and charging system with the highest value exceeding half of the rated storage capacity is scheduled as the dispatched system.

[0035] Step C2: When When the storage capacity is less than half of the rated storage value, it is dispatched from the power grid.

[0036] As a preferred embodiment of the present invention, the device energy detection unit performs detection and analysis based on the power output of the distributed energy storage charging system and the component temperature during the energy scheduling process of the energy scheduling management and analysis unit, and the specific expression of the obtained temperature analysis result is as follows:

[0037]

[0038] in, express Time number The temperature of the distributed energy storage charging system express Time number The first distributed energy storage charging system Temperature of each node Indicates the total number of nodes. This indicates a summation.

[0039] As a preferred technical solution of the present invention, the early warning management module in Time number Temperature of distributed energy storage charging system An early warning will be issued when the safety range is exceeded, and staff will be dispatched to carry out maintenance.

[0040] As a preferred embodiment of the present invention, the specific steps for determining whether to issue an early warning based on the temperature analysis results of the equipment energy detection unit are as follows:

[0041] Step D1: Determine the number of the exception. If the weather for the distributed energy storage and charging system is cloudy and the photovoltaic modules are blocked, then no staff will be dispatched for maintenance. If not, then proceed to step D2.

[0042] Step D2: Dispatch staff to carry out maintenance.

[0043] Compared with the prior art, the present invention provides a multifunctional distributed energy storage and charging system, which has the following beneficial effects:

[0044] This invention ensures the full utilization of electrical energy by performing scheduling analysis and calculation on the generated redundant power or by scheduling energy when the current distributed energy storage and charging system has insufficient power. Furthermore, the scheduling process is unique and free from interference from other inputs, ensuring safety. At the same time, the temperature of components during the power output of the distributed energy storage and charging system and the energy scheduling management and analysis unit is detected and analyzed to ensure the safety of power transmission. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the system framework of the present invention. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figure 1 A multifunctional distributed energy storage and charging system includes an energy storage module, an energy management module, an electric vehicle charging module, and an early warning management module;

[0048] The energy storage module includes a photovoltaic energy storage unit and a photovoltaic energy monitoring unit. The photovoltaic energy storage unit stores photovoltaic energy and records the stored and generated energy in all distributed energy storage and charging systems. The photovoltaic energy monitoring unit detects the stored and generated energy in each distributed energy storage and charging system and sends an anomaly signal to the early warning management module upon detecting an anomaly. The specific expressions for the photovoltaic energy storage unit storing and recording solar energy and the stored and generated energy in all distributed energy storage and charging systems are as follows:

[0049]

[0050] in, This represents the dataset stored in the photovoltaic energy storage unit. Don't mean Time number Distributed energy storage and charging systems store electrical energy. , Time number Distributed energy storage and charging systems store electrical energy. , Time number Distributed energy storage and charging systems store electrical energy. They represent Time number The generated electricity of the distributed energy storage and charging system , Time number The generated electricity of the distributed energy storage and charging system , Time number The photovoltaic energy monitoring unit detects the stored and generated electrical energy of each distributed energy storage and charging system as follows:

[0051] Step A1: Compare the stored energy of the current distributed energy storage and charging system with the total stored energy of the distributed energy storage and charging system. If the call threshold is met, invoke the energy management module to perform energy scheduling. If the call threshold is not met, proceed to step A2.

[0052] The specific expression for calling the threshold is as follows:

[0053]

[0054]

[0055]

[0056] in, express Time number Distributed energy storage and charging systems store electrical energy. Indicates number The maximum value of stored electrical energy in a distributed energy storage and charging system. express Time number The demand for distributed energy storage and charging systems;

[0057] Step A2: Calculate the increment of generated electrical energy in the distributed energy storage charging system, and send the increments of generated electrical energy in the distributed energy storage charging system that are lower than the average value to the early warning management module. The specific expression for calculating the increment of generated electrical energy in the distributed energy storage charging system in Step A2 is as follows:

[0058]

[0059] in, Indicates number The incremental power generated by the distributed energy storage and charging system express Time number The generated electricity of the distributed energy storage charging system express Time number The generated electricity of the distributed energy storage charging system The specific expression for sending the incremental power generated in the distributed energy storage charging system with an increment lower than the average value to the early warning management module in step A2, representing the time interval, is as follows:

[0060]

[0061] in, Indicates number The warning value for the increase in power generation, Indicates number The incremental power generated by the distributed energy storage and charging system Indicates number The incremental power generated by the distributed energy storage and charging system Indicates the number except for Summing up the incremental power generated by all distributed energy storage and charging systems other than those mentioned above, when... It is sent to the early warning management module in time. If the time is not right, it will not be sent to the early warning management module;

[0062] The energy management module includes an energy dispatch management and analysis unit and an equipment energy detection unit;

[0063] When the distributed energy storage and charging system is fully charged, the energy dispatch management and analysis unit performs dispatch analysis and calculation on the redundant power generated, and performs energy dispatch. The specific steps are as follows:

[0064] Step B1: Determine For distributed energy storage charging systems with storage values ​​below the rated value, if none exist, energy dispatch to the grid is performed; if so, step B2 is executed.

[0065] Step B2: Select the distributed energy storage and charging system that meets the lowest criteria in Step B1 as the scheduled system, occupy the scheduling channel of the scheduled system, and jump to B1.

[0066] like ,at this time Based on the judgment in step B1, redundant power is generated when the battery is fully charged. The smallest of them is Dispatch redundant power to In the middle, when Once fully charged, redundancy is also created. At this point, step B1 is executed again, and the above operation is repeated until all cells are fully charged. Then, the cells are fed back into the grid. During the process of filling, Fully loaded creates redundancy, at which point the scheduling system... The scheduling channel was Occupy, therefore Select during scheduling Perform scheduling;

[0067] When the power supply of the current distributed energy storage and charging system is insufficient, the energy dispatch management and analysis unit performs energy dispatch for the current distributed energy storage and charging system. The specific steps for the energy dispatch management and analysis unit to perform energy dispatch for the current distributed energy storage and charging system when the power supply is insufficient are as follows: Select... The distributed energy storage and charging system with the highest value exceeding half of the rated storage capacity is scheduled as the dispatched system. When the storage capacity is less than half of the rated storage value, dispatching is carried out from the power grid, such as: At this time, the rated storage value is 20kW, and the selection is... The scheduling is performed and repeated when... If the capacity is less than 10, a new selection is made. By performing scheduling analysis and calculation on the generated redundant power or when the current distributed energy storage and charging system power is insufficient, energy scheduling is carried out to ensure full utilization of electrical energy. In addition, during the scheduling process, the path is unique and there will be no other inputs to interfere.

[0068] When the electric vehicle charging module detects that a new energy vehicle is charging, it starts discharging at the power required by the new energy vehicle or the power that the energy storage module can support. Specifically: if the power required by the new energy vehicle is greater than the power that the energy storage module can support, it will discharge at the maximum power of the energy storage module; if the power required by the new energy vehicle is less than the power that the energy storage module can support, it will discharge at the power required by the new energy vehicle. When the distributed energy storage charging system corresponding to the new energy vehicle is charging has insufficient power, the energy management module will start to automatically perform energy scheduling.

[0069] The equipment energy detection unit detects and analyzes the component temperatures during the power output process of the distributed energy storage charging system and the energy dispatch management analysis unit's energy dispatch process, and sends the obtained temperature analysis results to the early warning management module. The specific expression for the obtained temperature analysis results is as follows:

[0070]

[0071] in, express Time number The temperature of the distributed energy storage charging system express Time number The first distributed energy storage charging system Temperature of each node Indicates the total number of nodes. To express summation;

[0072] The early warning management module determines whether to issue an early warning based on the temperature analysis results of the equipment's energy detection unit. For distributed energy storage charging systems requiring an early warning, it dispatches personnel for maintenance. The module also analyzes abnormal signals from the energy storage module for early warning. For distributed energy storage charging systems identified as abnormal, it alerts vehicle owners when new energy vehicles are charging and dispatches personnel for maintenance. Time number Temperature of distributed energy storage charging system An early warning is issued when the equipment exceeds the set safety range, and personnel are dispatched for maintenance. The specific steps for determining whether to issue an early warning based on the temperature analysis results of the equipment's energy detection unit are as follows: determine the number of the anomaly. If the weather for the distributed energy storage and charging system is cloudy and the photovoltaic modules are obstructed, then no maintenance will be scheduled. If neither condition is met, then maintenance will be scheduled.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional distributed energy storage charging system, characterized in that: It includes an electric energy storage module, an energy management module and an early warning management module; The electric energy storage module includes a photovoltaic energy storage unit and a photovoltaic energy monitoring unit. The photovoltaic energy storage unit is used to store photovoltaic energy and record the electric energy stored and generated in all distributed energy storage and charging systems. The photovoltaic energy monitoring unit is used to detect the electric energy stored and generated in each distributed energy storage and charging system, and send an abnormal signal to the early warning management module after detecting an abnormality. The energy management module includes an energy scheduling management analysis unit and an equipment energy detection unit; When the current distributed energy storage charging system is fully charged, the energy scheduling management and analysis unit performs scheduling analysis and calculation on the redundant power generated by the distributed energy storage charging system, and performs energy scheduling. When the current distributed energy storage charging system is insufficient in power, the energy scheduling management and analysis unit performs energy scheduling on the current distributed energy storage charging system. The equipment energy detection unit detects and analyzes the temperature of components during the power output of the distributed energy storage charging system and the energy scheduling process of the energy scheduling management and analysis unit, and sends the obtained temperature analysis results to the early warning management module; The early warning management module determines whether to issue an early warning based on the temperature analysis results of the equipment energy detection unit, and dispatches staff to perform maintenance on the distributed energy storage charging system that requires an early warning; The early warning management module also performs early warning analysis based on abnormal signals in the electric energy storage module. For distributed energy storage charging systems that are judged to be abnormal, the owner of the new energy vehicle is prompted and warned when the new energy vehicle is charging, and staff are dispatched for maintenance.

2. A multifunctional distributed energy storage charging system according to claim 1, characterized in that: The photovoltaic energy storage unit stores the light energy and records the specific expressions of the electric energy stored and the generated electric energy in all distributed energy storage charging systems as follows: in, represents a photovoltaic energy storage unit storage dataset, Don't say Time number The stored energy of the distributed energy storage charging system, , Time number The stored energy of the distributed energy storage charging system, , Time number The stored energy of the distributed energy storage charging system, Respectively Time number The distributed energy storage charging system generates electricity, , Time number The distributed energy storage charging system generates electricity, , Time number The generated electricity of the distributed energy storage charging system.

3. A multifunctional distributed energy storage charging system according to claim 2, characterized in that: The specific steps of the photovoltaic energy monitoring unit detecting the stored electric energy and generated electric energy of each distributed energy storage charging system are as follows: Step A1: Compare the electric energy stored in the current distributed energy storage charging system with the total storage amount of the distributed energy storage charging system. When the call threshold is met, call the energy management module to perform energy scheduling. When the call threshold is not met, execute step A2: The specific expression of the call threshold is as follows: in, express Time number The stored energy of the distributed energy storage charging system, Indicates the number The maximum value of the stored electrical energy of the distributed energy storage charging system, express Time number The demand value of distributed energy storage charging system; Step A2: Calculate the increment of the generated electric energy in the distributed energy storage charging system, and send the increment of the generated electric energy in the distributed energy storage charging system that is lower than the average value to the early warning management module.

4. A multifunctional distributed energy storage charging system according to claim 3, characterized in that: The specific expression for calculating the increment of generated electric energy in the distributed energy storage charging system in step A2 is as follows: in, Indicates the number The incremental amount of electricity generated by the distributed energy storage charging system, express Time number The power generated by the distributed energy storage charging system, express Time number The power generated by the distributed energy storage charging system, Indicates a time interval.

5. A multifunctional distributed energy storage charging system according to claim 4, characterized in that: The specific expression for sending the increment of generated electric energy in the distributed energy storage charging system whose increment is lower than the average value to the early warning management module in step A2 is as follows: in, Indicates the number The power generation increment warning value, Indicates the number The incremental amount of electricity generated by the distributed energy storage charging system, Indicates the number The incremental amount of electricity generated by the distributed energy storage charging system, Indicates the number of The increment of generated electric energy of all distributed energy storage charging systems other than When It will not be sent to the early warning management module.

6. A multifunctional distributed energy storage charging system according to claim 5, characterized in that: The energy dispatch management performs dispatch analysis and calculation of the redundant power generated by the current distributed energy storage charging system when the system is fully charged, and performs energy dispatch in the following specific steps: Step B1: Judgment If there is no distributed energy storage charging system with a storage value lower than the rated storage value, then energy dispatch is performed to the power grid; if there is, then step B2 is executed; Step B2: Select a distributed energy storage charging system that meets the lowest judgment in step B1 as the dispatched system, occupy the dispatching channel of the dispatched system, and jump to B1.

7. A multifunctional distributed energy storage charging system according to claim 6, characterized in that: The specific steps of the energy dispatching management and analysis unit for dispatching energy of the current distributed energy storage charging system when the current distributed energy storage charging system is insufficient in power are as follows: Step C1: Select The distributed energy storage charging system with the largest value higher than half of the rated storage value is dispatched as the dispatched system; Step C2: When When the storage capacity is higher than half of the rated storage value, it is dispatched from the power grid.

8. A multifunctional distributed energy storage charging system according to claim 7, characterized in that: The equipment energy detection unit detects and analyzes the temperature of components during the power output of the distributed energy storage charging system and the energy scheduling process of the energy scheduling management and analysis unit, and the specific expression of the obtained temperature analysis result is as follows: in, express Time number The temperature of the distributed energy storage charging system, express Time number Distributed energy storage charging system The temperature of the node, Indicates the total number of nodes, Indicates sum.

9. A multifunctional distributed energy storage charging system according to claim 8, characterized in that: The early warning management module Time number The temperature of the distributed energy storage charging system When the set safety range is exceeded, an early warning will be issued and staff will be dispatched for maintenance.

10. A multifunctional distributed energy storage charging system according to claim 9, characterized in that: The specific steps of determining whether to issue an early warning based on the temperature analysis result of the device energy detection unit are as follows: Step D1: Determine the number of the abnormality Whether the weather of the distributed energy storage charging system is cloudy or whether the photovoltaic module is blocked. If any one of the conditions is met, the staff will not be dispatched for maintenance. If not, step D2 is executed; Step D2: dispatching staff to carry out maintenance.

Images