Energy storage anti-reflux protection system

Abstract

The invention discloses an energy storage anti-countercurrent protection system, and the system comprises a countercurrent monitoring module which is used for monitoring the related data of a discharge and power generation system. A backup processing module; an adjustment setting module; and protecting the energy storage unit. According to the energy storage anti-countercurrent protection system, historical data of the setting module is adjusted to correspondingly start a corresponding number of power generation modules in the photovoltaic power generation unit to generate power, so that the regulation and control amplitude is reduced, and then the power of the power distribution network is monitored in real time through the countercurrent monitoring module; when the backup processing module detects and analyzes a countercurrent phenomenon, namely the photovoltaic power generation unit discharges too much electric quantity, the backup processing module adjusts the output quantity of electric energy through the adjustment setting module by means of cooperation of an inverter and other related equipment, and charges an energy storage battery module stored in the protection energy storage unit at the same time. Therefore, the protection performance is further improved, and the damage fault of electrical equipment caused by reverse current is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage backflow prevention, and in particular to an energy storage backflow prevention protection system. Background Art

[0002] In low-voltage power supply systems, power is generally supplied to each load in the power grid by distribution transformers, which is called forward current. With the optimization of the global energy structure, solar energy is increasingly respected as a clean and renewable energy source, and photovoltaic power generation is even more valued. After installing a photovoltaic power station, when the photovoltaic power generation power is greater than the power of the local load, the unabsorbed power must be sent to the power grid. Since the direction of the current is different from the conventional one, it is called reverse current or reverse flow. When too much power is sent to the power grid at the same time, it will not only lead to a decrease in the quality of power, but also cause some electrical faults due to the old age of some wires. After searching, it is found that the energy storage anti-reverse flow in the prior art is typically such as the publication number CN109088430A, a storage system anti-reverse flow protection power supply system and its measurement and control method. The energy storage system anti-reverse flow protection power supply system includes: at least one inverter, the inverter and Photovoltaic power generation components are electrically connected; at least one first switch, the first switch includes a first control terminal, a first terminal and a second terminal, the first terminal is electrically connected to the inverter, and the second terminal is electrically connected to the low-voltage power grid; a second switch for cutting off or turning on the power supply to the local load, the second switch includes a third terminal and a fourth terminal, the third terminal is electrically connected to the second terminal, and the fourth terminal is electrically connected to the local load; an anti-reverse flow protection circuit for preventing the power output by the inverter from being transmitted to the low-voltage power grid, the anti-reverse flow protection circuit is electrically connected to the inverter, the first control terminal and the low-voltage power grid respectively. Its main feature is that it can prevent the photovoltaic power generation components from transmitting power to the low-voltage power grid.

[0003] In summary, the existing energy storage backflow protection system has a single control basis, that is, the real-time power detected by the monitoring module. The control basis is single, which makes the control work frequent, large-scale and sudden, and prone to failure. In view of the above problems, it is necessary to improve the existing equipment. Summary of the invention

[0004] The purpose of the present invention is to provide an energy storage backflow protection system to solve the problem that the existing energy storage backflow protection system proposed in the above background technology has a single regulation basis, that is, the real-time power detected by the monitoring module, and the regulation basis is single, which makes the regulation work frequent, large-scale and sudden, and thus prone to failure.

[0005] To achieve the above object, the present invention provides the following technical solution: an energy storage backflow prevention system, comprising: A reverse current monitoring module, which is used to monitor relevant data of the discharge and power generation systems, and the data monitored by the reverse current monitoring module includes power, voltage and current of the discharge and power generation systems; A backup processing module, which is used to analyze the data monitored by the backflow monitoring module and classify and back up the data; An adjustment setting module, which adjusts the discharge and the discharge amount in the power generation system according to the analysis result of the backup processing module; A protection energy storage unit, wherein the protection energy storage unit is used to assist in bearing the power consumption, and the triggering of the protection energy storage unit is based on the control operation of the adjustment setting module.

[0006] Preferably, the discharge system monitored by the backflow monitoring module is a photovoltaic power generation system, namely a photovoltaic power generation unit and a power distribution network system, and the photovoltaic power generation unit includes multiple groups of power generation modules.

[0007] Preferably, the backup processing module analyzes the data monitored and uploaded by the backflow monitoring module, and controls a corresponding number of power generation modules to generate electricity according to the start adjustment setting module corresponding to the analysis result. At the same time, the backup processing module performs data analysis and comparison through the K-means clustering algorithm.

[0008] Preferably, the K-means clustering algorithm process is to first randomly select K objects as initial cluster centers, and then calculate the distance between each object and each seed cluster center, so as to obtain the opening and closing of the adjustment setting module and the work of the protection energy storage unit.

[0009] Preferably, when the analysis result data of the backup processing module is lower than a set range, the protection energy storage unit is charged through the adjustment setting module.

[0010] Preferably, the protective energy storage unit includes an energy storage battery module, a power monitoring module and a charge and discharge module, and the energy storage battery modules are provided in multiple groups, and the energy storage battery modules are used to store and share the power of the power generation module.

[0011] Preferably, the power monitoring module is used to record the power, charging time and discharging time corresponding to multiple energy storage battery modules through an online network.

[0012] Preferably, the charging and discharging module is used to control the charging and discharging time of multiple energy storage battery modules, and the energy storage battery modules simultaneously provide auxiliary power supply to the user side when photovoltaic power generation is insufficient.

[0013] Preferably, the charging and discharging module controls the sequential start-up of multiple groups of energy storage battery modules based on the order of cumulative running time, and the principle of the order of cumulative running time is to count the cumulative running time and current running time of each energy storage battery module, and according to the sorted device numbers, give priority to starting the energy storage battery modules with short cumulative running time, and give priority to stopping the energy storage battery modules with long current running time, so as to achieve precise control.

[0014] Preferably, the work log of the protection energy storage unit is synchronously backed up to the inside of the backup processing module, and the backup processing module summarizes the work content of the protection energy storage unit through a keyword extraction algorithm. At the same time, the extraction logic of the keyword extraction algorithm is: first, the text of the keyword to be extracted is subjected to data preprocessing operations such as word segmentation, part of speech screening, deduplication and removal of stop words to obtain candidate keywords; secondly, the total number of candidate keywords is calculated. The value is taken from all candidate keywords The keywords with the largest Top N values ​​are used as the final keywords for the work content of the protection energy storage unit.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the energy storage anti-backflow protection system, The present invention can effectively solve the problem that the existing energy storage backflow protection system has a single regulation basis, that is, the real-time power detected by the monitoring module, and the regulation basis is single, which makes the regulation work frequent, large and sudden, and thus prone to failure. The regulation setting module starts the corresponding number of power generation modules in the photovoltaic power generation unit to generate electricity based on the historical data stored and backed up in the backup processing module, and thereby reduces the regulation amplitude, thereby realizing primary fixed regulation within a specific time period. Secondly, the power of the power distribution network is monitored in real time through the backflow monitoring module. When the backup processing module detects and analyzes the backflow phenomenon, that is, the photovoltaic power generation unit releases too much electricity, the backup processing module adjusts the output of electric energy through the adjustment setting module through the inverter and other related equipment, and at the same time charges the energy storage battery module stored in the protective energy storage unit, thereby further improving its protection performance and avoiding backflow and causing damage to electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall control relationship of the system of the present invention; Figure 2 It is a schematic diagram of the control relationship between the backflow monitoring module, the adjustment setting module and the protection energy storage unit of the present invention; Figure 3 It is a schematic diagram of the connection relationship between the photovoltaic power generation unit, the power load and the power supply grid of the present invention.

[0017] In the figure: 1. Backflow monitoring module; 2. Backup processing module; 3. Adjustment setting module; 4. Protection energy storage unit. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0019] See also Figure 1-3 , the present invention provides a technical solution: Embodiment 1 This embodiment is a further description of the above embodiment. It should be understood that this embodiment includes all the aforementioned technical features and is further described in detail.

[0020] Energy storage anti-backflow protection system, including: A backflow monitoring module 1 is used to monitor the relevant data of the discharge and power generation system, and the data monitored by the backflow monitoring module 1 includes the power, voltage and current of the discharge and power generation system; The backup processing module 2 is used to analyze the data monitored by the backflow monitoring module 1 and classify and back up the data; The adjustment and setting module 3 adjusts the discharge and the discharge amount in the power generation system according to the analysis result of the backup processing module 2; The protection energy storage unit 4 is used to assist in bearing the power consumption, and the triggering of the protection energy storage unit 4 is based on the control operation of the adjustment setting module 3.

[0021] The discharge system monitored by the backflow monitoring module 1 is a photovoltaic power generation system, namely a photovoltaic power generation unit and a power distribution network system, and the photovoltaic power generation unit includes multiple power generation modules.

[0022] The backup processing module 2 analyzes the data monitored and uploaded by the backflow monitoring module 1, and controls the corresponding number of power generation modules to generate electricity according to the start adjustment setting module 3 corresponding to the analysis result. At the same time, the backup processing module 2 performs data analysis and comparison through the K-means clustering algorithm.

[0023] The K-means clustering algorithm process is to first randomly select K objects as the initial cluster centers, and then calculate the distance between each object and each seed cluster center, so as to obtain the opening and closing of the adjustment setting module 3 and the work of the protection energy storage unit 4.

[0024] When the analysis result data of the backup processing module 2 is lower than the set range, the protection energy storage unit 4 is charged through the adjustment setting module 3.

[0025] The protective energy storage unit 4 includes an energy storage battery module, a power monitoring module and a charge and discharge module, and the energy storage battery module is provided in multiple groups, and the energy storage battery module is used to store and share the power of the power generation module.

[0026] The power monitoring module is used to record the power, charging time and discharging time corresponding to multiple energy storage battery modules online.

[0027] The charging and discharging module is used to control the charging and discharging time of multiple energy storage battery modules, and the energy storage battery modules simultaneously provide auxiliary power supply to the user side when photovoltaic power generation is insufficient.

[0028] The charging and discharging module controls the sequential start-up of multiple groups of energy storage battery modules based on the order of cumulative running time, and the principle of the order of cumulative running time is to count the cumulative running time and current running time of each energy storage battery module, and according to the sorted device numbers, give priority to starting the energy storage battery modules with short cumulative running time, and give priority to stopping the energy storage battery modules with long current running time, so as to achieve precise control.

[0029] The work log of the protection energy storage unit 4 is synchronously backed up to the inside of the backup processing module 2, and the backup processing module 2 summarizes the work content of the protection energy storage unit 4 through the keyword extraction algorithm. At the same time, the extraction logic of the keyword extraction algorithm is: first, the text of the keyword to be extracted is subjected to data preprocessing operations such as word segmentation, part of speech screening, deduplication and removal of stop words to obtain candidate keywords; secondly, the candidate keywords are calculated. The value is taken from all candidate keywords The keywords with the largest Top N values ​​are used as the final keywords of the work content of the protection energy storage unit 4.

[0030] Specifically, in the actual working process, the adjustment setting module 3 starts the corresponding number of power generation modules in the photovoltaic power generation unit to generate electricity based on the historical data backed up by the internal storage of the backup processing module 2. Taking summer and winter as an example, a large amount of electricity is required for cooling and heating. Therefore, the working number of the power generation module needs to be reasonably increased according to the historical data to ensure normal power supply, so as to achieve primary fixed regulation within a specific time period. Secondly, the power of the power distribution network is monitored in real time through the reverse flow monitoring module 1. When the backup processing module 2 detects and analyzes through the K-means clustering algorithm that the power released by the photovoltaic power generation unit does not meet the power demand, as shown in the attached Figure 3The power at C is less than the power at B. The backup processing module 2 adjusts the output of electric energy through the adjustment setting module 3 through the cooperation of the inverter and other related equipment, and controls the energy storage battery module stored in the protection energy storage unit 4 to discharge. In addition, the power monitoring module is used to record the power, charging time and discharge time corresponding to multiple energy storage battery modules online.

[0031] Embodiment 2 This embodiment is a further description of the above embodiment. It should be understood that this embodiment includes all the aforementioned technical features and is further described in detail.

[0032] Energy storage anti-backflow protection system, including: A backflow monitoring module 1 is used to monitor the relevant data of the discharge and power generation system, and the data monitored by the backflow monitoring module 1 includes the power, voltage and current of the discharge and power generation system; The backup processing module 2 is used to analyze the data monitored by the backflow monitoring module 1 and classify and back up the data; The adjustment and setting module 3 adjusts the discharge and the discharge amount in the power generation system according to the analysis result of the backup processing module 2; The protection energy storage unit 4 is used to assist in bearing the power consumption, and the triggering of the protection energy storage unit 4 is based on the control operation of the adjustment setting module 3.

[0033] The discharge system monitored by the backflow monitoring module 1 is a photovoltaic power generation system, namely a photovoltaic power generation unit and a power distribution network system, and the photovoltaic power generation unit includes multiple power generation modules.

[0034] The backup processing module 2 analyzes the data monitored and uploaded by the backflow monitoring module 1, and controls the corresponding number of power generation modules to generate electricity according to the start adjustment setting module 3 corresponding to the analysis result. At the same time, the backup processing module 2 performs data analysis and comparison through the K-means clustering algorithm.

[0035] The K-means clustering algorithm process is to first randomly select K objects as the initial cluster centers, and then calculate the distance between each object and each seed cluster center, so as to obtain the opening and closing of the adjustment setting module 3 and the work of the protection energy storage unit 4.

[0036] When the analysis result data of the backup processing module 2 is lower than the set range, the protection energy storage unit 4 is charged through the adjustment setting module 3.

[0037] The protective energy storage unit 4 includes an energy storage battery module, a power monitoring module and a charge and discharge module, and the energy storage battery module is provided in multiple groups, and the energy storage battery module is used to store and share the power of the power generation module.

[0038] The power monitoring module is used to record the power, charging time and discharging time corresponding to multiple energy storage battery modules online.

[0039] The charging and discharging module is used to control the charging and discharging time of multiple energy storage battery modules, and the energy storage battery modules simultaneously provide auxiliary power supply to the user side when photovoltaic power generation is insufficient.

[0040] The charging and discharging module controls the sequential start-up of multiple groups of energy storage battery modules based on the order of cumulative running time, and the principle of the order of cumulative running time is to count the cumulative running time and current running time of each energy storage battery module, and according to the sorted device numbers, give priority to starting the energy storage battery modules with short cumulative running time, and give priority to stopping the energy storage battery modules with long current running time, so as to achieve precise control.

[0041] The work log of the protection energy storage unit 4 is synchronously backed up to the inside of the backup processing module 2, and the backup processing module 2 summarizes the work content of the protection energy storage unit 4 through the keyword extraction algorithm. At the same time, the extraction logic of the keyword extraction algorithm is: first, the text of the keyword to be extracted is subjected to data preprocessing operations such as word segmentation, part of speech screening, deduplication and removal of stop words to obtain candidate keywords; secondly, the candidate keywords are calculated. The value is taken from all candidate keywords The keywords with the largest Top N values ​​are used as the final keywords of the work content of the protection energy storage unit 4.

[0042] Specifically, in the actual working process, the adjustment setting module 3 starts the corresponding number of power generation modules in the photovoltaic power generation unit to generate electricity based on the historical data backed up by the backup processing module 2. Taking spring and autumn as an example, when the weather is comfortable and a large amount of electricity is not needed for temperature regulation, the number of working power generation modules needs to be reasonably reduced according to historical data to avoid backflow, so as to achieve primary fixed regulation within a specific time period. Secondly, the power of the power distribution network is monitored in real time through the backflow monitoring module 1. When the backup processing module 2 detects and analyzes the backflow phenomenon through the K-means clustering algorithm, that is, when the power released by the photovoltaic power generation unit exceeds the power demand, that is, when there is a backflow phenomenon, as shown in the attached Figure 3 The power at C is greater than the power at B, and the current flows to A. The backup processing module 2 adjusts the output of electric energy through the adjustment setting module 3 through the cooperation of the inverter and other related equipment, and at the same time controls the energy storage battery module for discharging stored in the protection energy storage unit 4 to complete the charging. In addition, the power monitoring module is used to record the power, charging time and discharge time corresponding to multiple energy storage battery modules online.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Energy storage anti-backflow protection system, characterized in that: include: A backflow monitoring module (1), the backflow monitoring module (1) being used to monitor relevant data of the discharge and power generation systems, and the data monitored by the backflow monitoring module (1) includes power, voltage and current of the discharge and power generation systems; A backup processing module (2), the backup processing module (2) being used to analyze the data monitored by the backflow monitoring module (1) and to classify and back up the data; An adjustment setting module (3), wherein the adjustment setting module (3) adjusts the discharge and the discharge amount in the power generation system according to the analysis result of the backup processing module (2); A protective energy storage unit (4), wherein the protective energy storage unit (4) is used to assist in assuming power consumption, and the triggering of the protective energy storage unit (4) is based on the control operation of the adjustment setting module (3).

2. The energy storage anti-backflow protection system according to claim 1 is characterized in that: The discharge system monitored by the backflow monitoring module (1) is a photovoltaic power generation system, namely a photovoltaic power generation unit and a power distribution network system, and the photovoltaic power generation unit includes a plurality of power generation modules.

3. The energy storage anti-backflow protection system according to claim 1 is characterized in that: The backup processing module (2) analyzes the data monitored and uploaded by the backflow monitoring module (1), and controls a corresponding number of power generation modules to generate electricity according to the start-up adjustment setting module (3) corresponding to the analysis result. At the same time, the backup processing module (2) performs data analysis and comparison through a K-means clustering algorithm.

4. The energy storage anti-backflow protection system according to claim 1 is characterized in that: The K-means clustering algorithm process is to first randomly select K objects as initial cluster centers, and then calculate the distance between each object and each seed cluster center, so as to obtain the opening and closing of the adjustment setting module (3) and the work of the protection energy storage unit (4).

5. The energy storage anti-backflow protection system according to claim 1 is characterized in that: When the analysis result data of the backup processing module (2) is lower than a set range, the protective energy storage unit (4) is charged through the adjustment setting module (3).

6. The energy storage anti-backflow protection system according to claim 1 is characterized in that: The protective energy storage unit (4) comprises an energy storage battery module, an electric quantity monitoring module and a charging and discharging module, and the energy storage battery modules are provided in multiple groups, and the energy storage battery modules are used to store and share the electric quantity of the power generation module.

7. The energy storage anti-backflow protection system according to claim 6 is characterized in that: The power monitoring module is used to record the power, charging time and discharging time corresponding to multiple energy storage battery modules online.

8. The energy storage anti-backflow protection system according to claim 6 is characterized in that: The charging and discharging module is used to control the charging and discharging time of multiple energy storage battery modules, and the energy storage battery modules simultaneously provide auxiliary power supply to the user side when photovoltaic power generation is insufficient.

9. The energy storage anti-backflow protection system according to claim 6, characterized in that: The charging and discharging module controls the sequential start-up of multiple groups of energy storage battery modules based on the order of cumulative running time, and the principle of the order of cumulative running time is to count the cumulative running time and current running time of each energy storage battery module, and according to the sorted device numbers, give priority to starting the energy storage battery modules with short cumulative running time, and give priority to stopping the energy storage battery modules with long current running time, so as to achieve precise control.

10. The energy storage anti-backflow protection system according to claim 1, characterized in that: The work log of the protection energy storage unit (4) is synchronously backed up to the inside of the backup processing module (2), and the backup processing module (2) summarizes the work content of the protection energy storage unit (4) through a key word extraction algorithm. At the same time, the extraction logic of the key word extraction algorithm is as follows: first, the text of the key words to be extracted is subjected to word segmentation, part of speech screening, deduplication and stop word removal data preprocessing operations to obtain candidate keywords; secondly, the number of candidate keywords is calculated. The value is taken from all candidate keywords The keywords with the largest TopN values ​​are used as the final keywords of the work content of the protection energy storage unit (4).

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