New energy storage battery pack charging and discharging safety management method and system

Abstract

The invention relates to the technical field of battery management, in particular to a new energy storage battery pack charging and discharging safety management method and system, and aims to solve the problem of how to use a new energy storage battery pack to supply power to an old industrial area where cables are old and cannot be transformed in a short time so as to solve the problem of overload work of the cables. In order to solve the problem, the invention provides a new energy storage battery pack charging and discharging safety management method, and the management method comprises the steps: dividing an industrial area into a plurality of management and control blocks, and predicting the current cable load capacity; obtaining a current power supply load, and calculating the residual load capacity of the management and control block; calculating the load change rate of the control block, and calculating the predicted overload time; when the predicted overload time is greater than or equal to the safety time, marking the management and control block as a to-be-configured block, and obtaining working information of the electric equipment to obtain an equipment load; obtaining a battery pack configuration scheme according to the calculated power supply gap; and obtaining an optimal power supply scheme.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management, and in particular, to a method and system for charging and discharging safety management of a new energy energy storage battery pack. Background Art

[0002] With the rapid development of China's economy, the industrial upgrading of industrial parks has become an important measure to promote high-quality economic development. The iterative update of industrial equipment and the development of industrial scale have led to a synchronous increase in the energy demand of industrial parks. However, the old power supply cables cannot meet the growing power supply demand, and there are many potential safety hazards. Due to problems such as the lack of scientific and unified planning, unreasonable functional layout, old infrastructure, and complex property rights structure in some old industrial parks, there are many difficulties and problems in the transformation process of industrial parks, which require long-term planning and development. The existing power supply network is difficult to replace and upgrade aging or faulty cables in a short time, unable to support the increasing power consumption load caused by an increasing number of high-power industrial equipment and ensure the power supply safety of industrial production, thus affecting the development of industrial parks, restricting the production efficiency of factories, and causing economic losses. Summary of the Invention

[0003] The problem solved by the present invention: How to use a new energy energy storage battery pack to supply power to an old industrial park with old cables and unable to be transformed in the short term to solve the problem of overloaded operation of the cables.

[0004] To solve the above problems, an embodiment of the present invention provides a method for charging and discharging safety management of a new energy energy storage battery pack. The management method includes: obtaining the cable working information of a control block and the historical power supply load data of the control block, and predicting the current cable load capacity; obtaining the current power supply load of the control block, and calculating the remaining load of the control block according to the current power supply load and the current cable load capacity; calculating the expected overload time according to the load change rate of the control block, and determining the block to be configured according to the expected overload time; obtaining the equipment load of the block to be configured, calculating the power supply gap of the block to be configured within the expected overload time according to the load change rate and the current power supply load, and obtaining the battery pack configuration plan of the new energy energy storage battery pack according to the power supply gap; calculating the battery pack utilization rate according to the electrical equipment powered by the applicable new energy energy storage battery pack to obtain the optimal power supply plan; adjusting the calculation of the power supply gap according to the optimal power supply plan, and recharging the new energy energy storage battery pack according to the current power supply load.

[0005] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The division of the control block ensures that the area with the risk of overloading the cable line in the industrial area can be quickly located, improves the configuration response speed of the new energy energy storage battery pack, facilitates management and control, predicts the current cable load capacity and calculates the remaining load. Through the data, it more intuitively reflects the cable power supply load pressure of different control blocks. Further, by calculating the predicted overload time, it intuitively reflects the risk level of overload in the current control block, reserves sufficient time for configuring the new energy energy storage battery pack, sets different safety times for different control blocks, improves the configuration efficiency of the new energy energy storage battery pack, can be arranged according to the specific conditions of different control blocks, reduces the energy storage resource pressure of the new energy energy storage battery pack, calculates the battery pack utilization rate, improves the energy storage resource utilization rate of the new energy energy storage battery pack, and alleviates the possible problem of shortage of new energy energy storage battery pack resources.

[0006] In an embodiment of the present invention, according to the load change rate of the control block, the predicted overload time is calculated, and the block to be configured is determined according to the predicted overload time, which specifically includes: when the predicted overload time is less than the safety time, maintaining the control state of the control block; when the predicted overload time is greater than or equal to the safety time, marking the control block as the block to be configured, and obtaining the working information of all electrical equipment in the block to be configured to obtain the equipment load.

[0007] By setting the safety time, it can be judged which control blocks need to be temporarily powered by the new energy energy storage battery pack. Further, it avoids the shortage of energy storage resources and the safety risk of overload caused by configuring the new energy energy storage battery pack for the block to be configured too early or too late, and improves the working efficiency and resource utilization rate of the new energy energy storage battery pack management system.

[0008] In an embodiment of the present invention, according to the cable working information, the cable loss situation is obtained to obtain the loss change coefficient; the historical power supply load data of the same power consumption time period in the control block is obtained to obtain the change trend of the maximum load in the control block during the power consumption time period; according to the change trend of the maximum load, the maximum load of the control block in the current time period is predicted to obtain the current maximum load; according to the loss change coefficient and the current maximum load, the current cable load capacity is calculated.

[0009] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By setting the loss change coefficient, the change in power supply capacity caused by cable aging and other reasons is considered, improving the calculation accuracy of the subsequent current cable load capacity. By calculating the current cable load capacity, it intuitively reflects the maximum load that the current control block can withstand, facilitating subsequent calculations and improving the effectiveness of the subsequent configuration scheme in the specific implementation process.

[0010] In an embodiment of the present invention, the current power supply load of the control block is obtained, and the remaining load of the control block is calculated according to the current power supply load and the current cable load capacity. Specifically, it includes: setting a detection period, obtaining the current and voltage data of all electrical equipment in each detection period of the control block, and calculating the total data value to obtain the current power supply load; calculating the difference value according to the current power supply load and the current cable load capacity to obtain the remaining load of the control block in each detection period.

[0011] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By periodically calculating the remaining load, it intuitively reflects the cable power supply pressure situation in this power supply block, facilitating the subsequent calculation of the expected overload time, improving the accuracy of the subsequent calculation, and at the same time ensuring that the power supply block of the control block can be obtained in a timely manner, improving the detection sensitivity of the management system to the cable working load.

[0012] In an embodiment of the present invention, according to the load change rate of the control block, the expected overload time is calculated, and the block to be configured is determined according to the expected overload time. Specifically, it includes: obtaining the power supply load data of the control block in each past time period to obtain the power supply load change trend; obtaining the power supply load data of the control block in the same past period, calculating the power supply load difference of the control block year by year, and calculating the expected growth amount; combining the power supply load change trend and the expected growth amount to calculate the load change rate; according to the load change rate and the remaining load, calculating the time required for the current power supply load of the control block to exceed the current cable load capacity to obtain the expected overload time.

[0013] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By obtaining the power load change trend, it can be judged whether there is an overload risk in this control block. Calculating the expected overload time can predict the specific time when the cable in the control block is overloaded, facilitating the subsequent planning and management of the new energy energy storage device, and improving the operation efficiency of the management system.

[0014] In an embodiment of the present invention, according to the time required for configuring the new energy energy storage battery pack for each control block, a corresponding safety time is set for each control block; comparing the expected overload time with the safety time. If the expected overload time is less than the safety time, the current control state of the control block is maintained. When the expected overload time is greater than or equal to the safety time, the control block is marked as a block to be configured, and according to the length of the expected overload time, the configuration priority of each block to be configured is determined; obtaining the power consumption data of all electrical equipment in each block to be configured, and according to the power consumption data, obtaining the power supply amount and power supply power required for all electrical equipment in the block to be configured to maintain normal working state, denoted as the equipment load.

[0015] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By setting a safety time, it is possible to determine which control blocks require temporary power supply from the new energy energy storage battery pack. Further, it avoids the shortage of energy storage resources and the overloading safety risks caused by configuring the new energy energy storage battery pack for the block to be configured too early or too late, and improves the working efficiency and resource utilization rate of the new energy energy storage battery pack management system.

[0016] In one embodiment of the present invention, according to the load change rate and the current power supply load, the change amount of the power supply load per unit time of the control block is calculated to obtain a load growth curve; according to the load growth curve and the current cable load capacity, the power supply gap is calculated; according to the configuration priority, the order of solving the power supply gap problem is sorted to obtain a solution order; according to the solution order and the power supply gap, the new energy energy storage battery packs with the optimal energy storage capacity, power size and quantity that meet the power supply gap requirements are sequentially selected to configure the block to be configured, and a battery pack configuration scheme is obtained.

[0017] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By calculating the power supply gap, the specific load capacity required for different blocks to be configured can be clarified, and then the optimal new energy energy storage battery pack can be selected to supply energy to the configuration block, improving the energy storage utilization rate of the new energy energy storage battery pack, reducing the situation where it is impossible to configure the new energy energy storage battery pack for some blocks to be configured in time due to insufficient energy storage, and improving the power supply safety of the industrial area.

[0018] In one embodiment of the present invention, the total energy storage capacity and total power data of the new energy energy storage battery packs in the battery pack configuration scheme are obtained to obtain battery pack load data; according to the battery pack load data and the equipment load, all the equipment that can be powered by the new energy energy storage battery pack and work normally is screened out and marked as the equipment to be selected; according to the equipment to be selected and the battery pack load data, the load ratio generated when each equipment to be selected adopts the new energy energy storage battery pack for power supply is calculated to obtain the battery pack utilization rate; according to the battery pack utilization rate, the equipment to be selected is combined, and the total utilization rate of each combination is calculated; according to the total utilization rate, the equipment to be selected for power supply by the new energy energy storage battery pack is determined to obtain an optimal power supply scheme.

[0019] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By calculating the battery pack utilization rate, the utilization rate of the new energy energy storage battery pack is improved, the load pressure on the cable is alleviated to the greatest extent, the power supply stability and safety of the control block are improved, ensuring that the new energy energy storage battery pack can quickly determine the optimal power supply scheme in different situations to supply temporary power to suitable working equipment, improving the configuration efficiency of the new energy energy storage battery pack, and facilitating the subsequent power supply work.

[0020] In an embodiment of the present invention, according to the solution sequence and the optimal power supply scheme, each new energy energy storage battery pack is sequentially connected to each block to be configured to supply power to the equipment; the energy storage consumption of the new energy energy storage battery pack in the implementation of the optimal power supply scheme is obtained to obtain power supply data; the difference between the power supply data and the power supply gap in each time period is compared, and the calculation of the power supply gap is adjusted to obtain a correction coefficient, which is stored in the system database for the next power supply gap calculation.

[0021] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: by setting the correction coefficient, the accuracy of the power supply gap calculation for the block to be configured by the management system can be improved, the resource utilization rate of the new energy energy storage battery pack can be increased, and further, the problem that the power supply gap cannot be solved due to too large an error in the power supply gap calculation result, which affects the normal production of the factory, is avoided, and the power supply safety and stability of the industrial area are improved.

[0022] In an embodiment of the present invention, the present invention also provides a new energy energy storage battery pack charge and discharge safety management system. The new energy energy storage battery pack charge and discharge safety management method recorded in the above embodiment is applied to this management system. The management system includes: an acquisition module, which is used to acquire cable working information and historical power supply load data; a prediction module, which is used to predict the current cable load capacity and the expected overload time; a calculation module, which is used to calculate the remaining load amount and the power supply gap; an execution module, which is used to execute the optimal power supply scheme. This new energy energy storage battery pack charge and discharge safety management system has all the technical features of the above new energy energy storage battery pack charge and discharge safety management method, and will not be elaborated here one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is one of the flowcharts of the new energy energy storage battery pack charge and discharge safety management system of the present invention; Figure 2 It is the second flowchart of the new energy energy storage battery pack charge and discharge safety management system of the present invention; Figure 3 It is the third flowchart of the new energy energy storage battery pack charge and discharge safety management system of the present invention; Figure 4 It is the fourth flowchart of the new energy energy storage battery pack charge and discharge safety management system of the present invention; Figure 5 It is the new energy energy storage battery pack charge and discharge safety management system diagram; DESCRIPTION OF THE REFERENCE NUMERALS 100 - Management system; 120 Acquisition module; 130 - Prediction module; 140 - Calculation module; 150 - Execution module. DETAILED DESCRIPTION OF THE INVENTION

[0024] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of specific embodiments of the present invention will be given in conjunction with the accompanying drawings.

[0025]

First Embodiment

[0026] In step S100, the industrial area is divided into multiple controlled areas, which are divided by functional area. Based on the principle of facilitating management and control, it depends on the specific situation of the industrial area. The cable working information and historical power supply load data are stored in the system database. Among them, the cable working information requires technicians to conduct pre-detection and registration on all cables to obtain relevant cable data.

[0027] In step S200, with the development of the industrial area, the power consumption load in the controlled area generally increases year by year or remains within a relatively stable range. And within a year, the time with the largest load is usually concentrated in summer. By calculating the remaining load, it is ensured that the load of the controlled area will not exceed the current cable load capacity, and there is no risk of overloading work.

[0028] In step S300, the historical power supply load data usually includes relevant data for the same time period in the past ten years in this control block. To avoid production safety risks caused by overloading, usually, a certain margin needs to be ensured for the remaining load, which can be 10% or 15%. For example, in the calculation process of the predicted overloading time, it is set as the time required for the power supply load to increase to 10% of the remaining load.

[0029] In step S400, since it takes time for the transportation and installation processes in the actual configuration process of the new energy energy storage battery pack, a safety time needs to be set to ensure sufficient time for the transportation and installation of the new energy energy storage battery pack in the block to be configured. The safety times for different control blocks are different and depend on specific time requirements.

[0030] In step S500, since the energy storage of the new energy energy storage battery pack is limited in actual applications, to ensure that temporary power supply can be provided to as many control areas at risk of overloading as possible, during the process of determining the battery pack configuration plan, the power supply gap should be calculated, and new energy energy storage battery packs should be provided to each control block at risk of overloading as needed, avoiding waste of energy storage resources during the configuration process, improving the utilization rate of the new energy energy storage battery pack, and thus reducing the inability to provide temporary power supply to the control block at risk of overloading in a timely manner due to insufficient reserves of the new energy energy storage battery pack.

[0031] In step S600, since the power and energy storage of the new energy energy storage battery pack are limited, and there are usually a large number of large industrial production equipment in industrial areas, such equipment usually requires high-power power supplies for long-term power supply, and the new energy energy storage battery pack cannot meet the power supply requirements for its normal operation. Therefore, equipment that conforms to the power supply mode of the new energy energy storage battery pack needs to be selected for power supply to relieve the power supply load pressure in the block to be configured. Further, to relieve the power supply load pressure to the greatest extent, in the selection of the optimal power supply plan, a combination of electrical equipment that can make the most of the battery pack is selected, and the new energy energy storage battery pack is used for temporary power supply.

[0032] Since the calculation of the power supply gap is obtained through predictive calculations, there is a difference from the actual power supply gap. To improve the accuracy of the subsequent calculation of the power supply gap for this control block, the difference between the power supply data of the new energy energy storage battery pack and the predicted power supply gap is compared to determine the correction coefficient and adjust the subsequent calculation of the power supply gap.

[0033] When the current power supply load of the block to be configured is less than the current cable load capacity again, the new energy energy storage battery pack is recharged, and the control block continues to be controlled. During the daily production activities in the industrial area, the power supply load during the day is usually much greater than that at night, and the power supply load during the peak season is also usually much greater than that during the off-season. Therefore, as time and seasons change, the power supply load of the control block may be reduced to a safe range. At this time, the new energy energy storage battery pack is recharged to improve the working efficiency of the new energy energy storage battery pack.

[0034] The division of the control block ensures that the areas with the risk of overloading the cable lines in the industrial area can be quickly located, improves the configuration response speed of the new energy energy storage battery pack, facilitates control, predicts the current cable load capacity and calculates the remaining load. Through the data, it more intuitively reflects the cable power supply load pressure of different control blocks. Further, by calculating the expected overload time, it intuitively reflects the risk level of overload in the current control block, reserves sufficient time for configuring the new energy energy storage battery pack, sets different safety times for different control blocks, improves the configuration efficiency of the new energy energy storage battery pack, can be arranged according to the specific conditions of different control blocks, reduces the energy storage resource pressure of the new energy energy storage battery pack, calculates the battery pack utilization rate, improves the energy storage resource utilization rate of the new energy energy storage battery pack, and alleviates the possible problem of shortage of resources of the new energy energy storage battery pack.

[0035]

Second Embodiment

[0036] In steps S310 to S320, the safety time is usually 30 minutes. Since there are many risks in the transportation process and the configuration process during the actual configuration, which lead to an increase in the configuration time, when setting the safety time, it should be increased as much as possible within the configuration capacity to ensure that the configuration of the new energy energy storage battery pack can be completed before the cable of the block to be configured is overloaded.

[0037] Further, when the predicted overload time is less than the safety time, continue to control the controlled block. When the predicted overload time is greater than or equal to the safety time, mark the controlled block as a block to be configured, and obtain the working information of all electrical equipment in the block to be configured to obtain the equipment load, specifically including: Set the corresponding safety time for each controlled block according to the time required for configuring the new energy energy storage battery pack for the controlled block; Compare the predicted overload time with the safety time. If the predicted overload time is less than the safety time, maintain the current control status of the controlled block. When the predicted overload time is greater than or equal to the safety time, mark the controlled block as a block to be configured, and determine the configuration priority of each block to be configured according to the length of the predicted overload time; Obtain the power consumption data of all electrical equipment in each block to be configured. According to the power consumption data, obtain the power supply quantity and power supply power required for all electrical equipment in the block to be configured to maintain normal working status, and record it as the equipment load.

[0038] The setting of the safety time is determined according to the overall time required for the new energy energy storage battery pack for the controlled block, and different safety times should be set for different time periods considering the different degrees of resource tension of the new energy energy storage battery pack in different periods.

[0039] For example, for the same controlled block, during the peak load period of the industrial area in July and August, the safety time is ten days, and during the low load period of the industrial area in April and May, the safety time is set to 5 days.

[0040] When the predicted overload time is less than the safety time, it indicates that the overload risk of the controlled block is extremely low. Therefore, there is no need to configure a new energy energy storage battery pack, and it can continue to be controlled. When the predicted overload time is greater than or equal to the safety time, the shorter the predicted overload time, the shorter the time for configuring the new energy energy storage battery pack, so the priority is higher. In this way, the management of the new energy energy storage battery pack is optimized, and the situation of not configuring the block to be configured in time is avoided.

[0041] The power consumption data of the electrical equipment is stored in the system database and is obtained by relevant technical personnel through regular technical means for regular detection and recording of the controlled area.

[0042] By setting the safety time, it can be judged which controlled blocks need a new energy energy storage battery pack for temporary power supply. Further, it avoids the energy storage resource tension and overload safety risk caused by configuring the new energy energy storage battery pack for the block to be configured too early or too late, and improves the working efficiency and resource utilization rate of the new energy energy storage battery pack management system.

[0043]

Third Embodiment

[0044] In step S110, the value of the loss change coefficient is related to various data such as the aging degree, and reflects the possible increase in the maximum loss value caused by the cable during the power supply to the target control block. Usually, it continuously increases with the increase of the cable usage time.

[0045] In steps S120 to S140, the maximum load refers to the maximum load that the cable supplying power to the control block can withstand, which is obtained by regularly monitoring the target cable through conventional detection means such as a megohmmeter and stored in the system database. Usually, obtain the maximum load in this time period in the past five years, calculate the difference in the maximum load year by year, predict the current maximum load, and further calculate the current cable load capacity according to the loss change coefficient.

[0046] For example, the maximum loads of a certain control block on December 5 in the past five years are 50000kW, 53000kW, 55000kW, 60000kW, and 63000kW from far to near in sequence. Then the annual growth differences are 3000kW, 2000kW, 5000kW, and 3000kW in sequence, and the average growth difference is 3250kW. Then the predicted current maximum load is 66325kW, and the loss change coefficient is 0.98. Calculate the current cable load capacity to be 64998.5kW.

[0047] By setting the loss change coefficient, the change in power supply capacity due to cable aging and other reasons is considered, improving the calculation accuracy of the subsequent current cable load capacity. By calculating the current cable load capacity, it intuitively reflects the maximum load that the current control block can withstand, facilitating the subsequent calculation and improving the effectiveness of the subsequent configuration plan in the specific implementation process.

[0048]

Fourth Embodiment

[0049] In step S210, the detection period can be one hour or fifteen minutes, depending on specific requirements. The shorter the detection period, the more accurate the data of the electrical equipment, which can improve the accuracy of the calculation of the current power supply load.

[0050] In step S220, in the production of industrial areas, there are peak production loads, usually in the time periods of 8:00 - 12:00 and 18:00 - 22:00. Therefore, the size of the remaining load will also change continuously with the change of the production load. Therefore, it is necessary to calculate the remaining load periodically according to the detection period to ensure that the remaining load data is consistent with the actual power supply situation.

[0051] For example, if the current power supply load in a certain detection period is 60000 kW and the current cable load capacity is 62000 kW, then the remaining load in the current detection period is 2000 kW, and it is stored in the system database.

[0052] By calculating the remaining load periodically, it intuitively reflects the cable power supply pressure situation of the power supply block, facilitates the subsequent calculation of the expected overload time, improves the accuracy of the subsequent calculation, and at the same time ensures that the power supply block of the control block can be obtained in time, improving the detection sensitivity of the management system to the cable working load.

[0053]

Fifth Embodiment

[0054] In step S330, the time period is set to be the same as the detection cycle time. Usually, the power supply load data for each time period within the past fifteen days is retrieved to reflect the recent changes in the power supply load.

[0055] It should be noted that if the change in the power supply load shows a downward trend, it indicates that there is no overload risk, and there is no need to calculate the predicted overload time.

[0056] In step S340, the same period in the past refers to the power supply load data for the same day in the past five years. Calculate the growth amount of the power supply load on this day in each past year, in the same way as calculating the current maximum load, and predict the growth amount of the power supply load on this day to obtain the predicted growth amount.

[0057] In step S350, the load change rate changes with time. In the process of calculating the load change rate, to improve the calculation accuracy, the power supply load change trend and the predicted growth amount should be comprehensively considered. To ensure as much as possible to avoid the risk of cable power supply overload, select the larger prediction result as the data basis for calculating the load change rate. The calculation formula is: S c =(W a / W p )×100%. S c is the load change rate, W a is the growth amount, and W p is the current power supply load.

[0058] For example, the current power supply load on a certain day is 60,000 kW. According to the power supply load change trend, it is judged that the power supply load shows an upward trend. The average daily growth amount within the past fifteen days is 300 kW. According to the power supply load data in the past five years, the predicted growth amount of the power supply load on this day is calculated to be 350 kW. Then select 350 kW as the growth amount data for calculating the load change rate, and calculate the load change rate = (350 kW / 60,000 kW) × 100% ≈ 0.583%.

[0059] In step S360, the predicted overload time reflects the remaining time expected for the cable in the control block to reach the overload state. The calculation formula is: T s =(S L ×W r ) / (W p ×S c ). T s is the predicted overload time, and S Lis the remaining load coefficient, W r is the remaining load.

[0060] For example, in a certain controlled area, the remaining load is 2000 kW, the set margin is 10%, then the remaining load coefficient is 90%, the current power supply load is 60000 kW, and the load change rate is 0.583%. Calculate the predicted overload time = (90% × 2000 kW) / (60000 kW × 0.583%) ≈ 5.14 days.

[0061] It should be noted that due to the differences in the daily load change rate, the corresponding load change rates for the next few days can be calculated separately, and the predicted overload time can be calculated in segments to improve the calculation accuracy of the predicted overload time. The specific number of calculation days depends on actual needs.

[0062] By obtaining the trend of the electrical load change, it is possible to determine whether there is an overload risk in the controlled area. Calculating the predicted overload time can predict the specific time when the cables in the controlled area are overloaded, which is convenient for the subsequent planning and management of the new energy energy storage device and improves the operating efficiency of the management system.

[0063]

Sixth Embodiment

[0064] In steps S410 to S430, since the number of new energy energy storage battery packs is limited, therefore, according to the configuration priority, the power supply gap of the area to be configured with urgent time is calculated first. Usually, the power supply gap for the next fifteen days is calculated. The minimum unit time of the load growth curve and the current cable load capacity is one day. The load growth curve refers to the daily average load, and the data is recorded in the form of a line graph. Calculate the load difference when the average load is greater than the current cable load capacity, and calculate the total value to obtain the power supply gap.

[0065] For example, if a control block is marked as a block to be configured on July 5 of a certain year, then calculate the load growth curve and the current cable load capacity during the period from July 5 to July 20. It is calculated that the average load on July 5, July 10, and July 18 is greater than the current cable load capacity. Calculate the load differences on these three days to be 100 kW, 300 kW, and 200 kW respectively. Then the total power supply gap of the block to be configured is 600 kW.

[0066] In step S440, during the actual production process in the industrial area, since the power supply gaps of different blocks to be configured are different, the specifications of the new energy energy storage battery packs are different and the quantity is limited. To reduce the problem of resource tension of the new energy energy storage battery packs caused by too many blocks to be configured, suitable new energy energy storage battery packs should be selected as needed to solve the power supply gap problems of the corresponding blocks to be configured.

[0067] For example, if the power supply gap of a block to be configured is 600 kW, and there are three new energy energy storage battery packs with existing loads of 200 kW, 400 kW, and 800 kW, then two new energy energy storage battery packs of 200 kW and 400 kW should be preferentially selected as the battery pack configuration scheme for this configured block.

[0068] By calculating the power supply gap, the specific load capacity required for different blocks to be configured can be clarified, and then the optimal new energy energy storage battery pack can be selected to supply energy to this configured block, improving the energy storage utilization rate of the new energy energy storage battery pack, reducing the situation where the new energy energy storage battery pack cannot be configured for some blocks to be configured in time due to insufficient energy storage, and improving the power supply safety of the industrial area.

[0069]

Seventh Embodiment

[0070] In steps S510 to S520, if there are multiple new energy energy storage battery packs in the battery pack configuration plan, in order to prevent the new energy energy storage battery pack with a smaller load capacity from being powered by candidate devices without load requirements, the optimal power supply plan for the new energy energy storage battery pack with a smaller load capacity should be determined first according to the load capacity of the new energy energy storage battery pack.

[0071] In steps S530 to S540, in order to reduce the cable power supply pressure in the area to be configured as much as possible, the utilization rate of the new energy energy storage battery pack should be increased as much as possible. The calculation formula for the battery pack utilization rate is: U b = (W e / W b ) × 100%. U b is the battery pack utilization rate, W e is the device load, and W b is the battery pack load capacity.

[0072] For example, in the battery pack configuration plan, the load capacity of a new energy energy storage battery pack is 800 kW. Among the combinations of one of the candidate devices, there are three working devices, namely device A, device B, and device C. The device loads are 300 kW, 160 kW, and 270 kW in sequence. Among them, the battery pack utilization rate U b of device A = (300 kW / 800 kW) × 100% = 37.5%. Similarly, the battery pack utilization rates of device B and device C are calculated to be 20% and 33.75% in sequence, and the overall utilization rate of the battery pack utilization rate is calculated to be 91.25%.

[0073] In step S550, calculate the overall utilization rate of each group of candidate devices, and preferentially select the combination with the highest overall utilization rate as the optimal power supply plan. If there are multiple power supply plans with the same overall utilization rate at the same time, preferentially select the plan with the fewest working devices as the optimal power supply plan to ensure the power supply stability of the optimal power supply plan.

[0074] By calculating the battery pack utilization rate, the utilization rate of the new energy energy storage battery pack is increased, the load pressure on the cable is relieved to the greatest extent, the power supply stability and safety of the controlled area are improved, it is ensured that the new energy energy storage battery pack can quickly determine the optimal power supply plan to temporarily power the suitable working devices under different circumstances, the configuration efficiency of the new energy energy storage battery pack is improved, and it is convenient for the subsequent power supply work to be carried out.

[0075]

Eighth Embodiment

[0076] In step S610, if there are sufficient staff to implement the optimal power supply plan of the new energy energy storage battery pack, multiple new energy energy storage battery packs can be configured for multiple blocks to be configured simultaneously to improve the configuration efficiency.

[0077] It should be noted that since the normal power supply of some cables will inevitably be affected during the configuration of the new energy energy storage battery pack for the block to be configured, when choosing the connection time of the new energy energy storage battery pack, the peak power consumption period of the block to be configured should be avoided as much as possible, and the connection should be made at night or other appropriate times.

[0078] In step S620, the energy storage consumption of the new energy energy storage battery pack is detected in real time. If the energy storage consumption is too fast, a quick response can be made to recalculate the optimal power supply plan for the block to be configured to avoid the power outage risk caused by insufficient energy storage. The power supply data is stored in the system database.

[0079] In step S630, the energy storage consumption in the power supply data reflects the true size of the power supply gap in the configured block, which is different from the predicted power supply gap size. Therefore, the correction coefficient is calculated through the difference data to correct the calculation of the power supply gap.

[0080] For example, if the actual power supply gap calculated based on the power supply data of a block to be configured on August 15 is 400 kW, while the predicted power supply gap is 420 kW, then the correction coefficient is 400 kW / 420 kW ≈ 0.952, which is stored in the system database as the correction coefficient for the power supply gap calculation on August 15 for future power supply gap calculations.

[0081] By setting the correction coefficient, the accuracy of the power supply gap calculation for the block to be configured by the management system can be improved, the resource utilization rate of the new energy energy storage battery pack can be increased, and further, the problem of being unable to solve the power supply gap due to too large an error in the power supply gap calculation result, which affects the normal production of the factory, can be avoided, and the power supply safety and stability of the industrial area can be improved.

[0082]

Ninth Embodiment

[0083] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A method for charging and discharging safety management of a new energy energy storage battery pack, characterized in that, The management method includes: Obtaining the cable working information of the controlled block and the historical power supply load data of the controlled block, and predicting the current cable load capacity; Obtaining the current power supply load of the controlled block, and calculating the remaining load of the controlled block according to the current power supply load and the current cable load capacity; Calculating the predicted overload time according to the load change rate of the controlled block, and determining the block to be configured according to the predicted overload time; Obtaining the equipment load of the block to be configured, calculating the power supply gap of the block to be configured within the predicted overload time according to the load change rate and the current power supply load, and obtaining the battery pack configuration plan of the new energy energy storage battery pack according to the power supply gap; Calculating the battery pack utilization rate according to the electrical equipment powered by the new energy energy storage battery pack to obtain the optimal power supply plan; Adjusting the calculation of the power supply gap according to the optimal power supply plan, and recharging the new energy energy storage battery pack according to the current power supply load.

2. The method for charging and discharging safety management of the new energy energy storage battery pack according to claim 1, wherein The calculating the predicted overload time according to the load change rate of the controlled block, and determining the block to be configured according to the predicted overload time specifically includes: When the predicted overload time is less than the safe time, maintaining the control state of the controlled block; When the predicted overload time is greater than or equal to the safe time, marking the controlled block as the block to be configured, and obtaining the working information of all the electrical equipment in the block to be configured to obtain the equipment load.

3. The method for charging and discharging safety management of the new energy energy storage battery pack according to claim 2, characterized in that, The obtaining the cable working information of the controlled block and the historical power supply load data of the controlled block, and predicting the current cable load capacity specifically includes: According to the cable working information, obtaining the cable loss situation to obtain the loss change coefficient; Obtaining the historical power supply load data in the same power consumption time period in the controlled block to obtain the load maximum value change trend in the power consumption time period in the controlled block; Predicting the load maximum value of the controlled block in the current time period according to the load maximum value change trend to obtain the current maximum load; Calculating the current cable load capacity according to the loss change coefficient and the current maximum load.

4. The method for charging and discharging safety management of the new energy energy storage battery pack according to claim 3, characterized in that, The obtaining the current power supply load of the controlled block, and calculating the remaining load of the controlled block according to the current power supply load and the current cable load capacity specifically includes: Setting a detection period, obtaining the current and voltage data of all the electrical equipment in each detection period of the controlled block, and calculating the total data value to obtain the current power supply load; Calculating the difference value of the remaining load of the controlled block in each detection period according to the current power supply load and the current cable load capacity.

5. The method for charging and discharging safety management of the new energy energy storage battery pack according to claim 4, wherein The calculating the predicted overload time according to the load change rate of the controlled block, and determining the block to be configured according to the predicted overload time specifically includes: Obtaining the power supply load data of the controlled block in each past time period to obtain the power supply load change trend; Obtaining the power supply load data of the controlled block in the same past period, calculating the power supply load difference of the controlled block year by year, and calculating the predicted growth amount; Combined with the power supply load change trend and the predicted growth amount, the load change rate is calculated; According to the load change rate and the remaining load amount, calculate the time required for the current power supply load in the control block to exceed the current cable load capacity, and obtain the predicted overload time.

6. The method for charging and discharging safety management of the new energy energy storage battery pack according to claim 5, wherein, Obtain the device load of the block to be configured, calculate the power supply gap in the block to be configured within the predicted overload time according to the load change rate and the current power supply load, and obtain the battery pack configuration plan of the new energy energy storage battery pack according to the power supply gap. It further includes: According to the load change rate and the current power supply load, calculate the change amount of the power supply load per unit time in the control block, and obtain the load growth curve; Calculate the power supply gap according to the load growth curve and the current cable load capacity; According to the configuration priority, sort the order of solving the power supply gap problem to obtain the solution order; According to the solution order and the power supply gap, sequentially select the new energy energy storage battery packs with the optimal energy storage capacity, power size and quantity that meet the power supply gap requirements to configure the block to be configured, and obtain the battery pack configuration plan.

7. The method for charging and discharging safety management of the new energy energy storage battery pack according to claim 6, characterized in that, Calculate the battery pack utilization rate according to the electrical equipment powered by the new energy energy storage battery pack to obtain the optimal power supply plan, specifically including: Obtain the total energy storage capacity and total power data of the new energy energy storage battery packs in the battery pack configuration plan to obtain the battery pack load data; According to the battery pack load data and the device load, screen out all the devices that can be powered by the new energy energy storage battery packs and work normally, and mark them as devices to be selected; According to the devices to be selected and the battery pack load data, calculate the load ratio generated when each device to be selected is powered by the new energy energy storage battery pack to obtain the battery pack utilization rate; According to the battery pack utilization rate, combine the devices to be selected and calculate the total utilization rate of each combination; Determine the devices to be selected for powering the new energy energy storage battery packs according to the total utilization rate to obtain the optimal power supply plan.

8. The method for charging and discharging safety management of the new energy energy storage battery pack according to claim 7, characterized in that, Adjust the calculation of the power supply gap according to the optimal power supply plan, and recharge the new energy energy storage battery packs according to the current power supply load. Specifically including: According to the solution order and the optimal power supply plan, sequentially connect each new energy energy storage battery pack to each block to be configured to power the devices; Obtain the energy storage consumption of the new energy energy storage battery packs in implementing the optimal power supply plan to obtain the power supply data; Compare the difference between the power supply data and the power supply gap in each time period, adjust the calculation of the power supply gap, obtain the correction coefficient, and store it in the system database for the next calculation of the power supply gap.

9. A charge and discharge safety management system for a new energy energy storage battery pack, characterized in that, The new energy energy storage battery pack charge and discharge safety management method according to any one of claims 1 to 8 is applied to the management system, and the management system includes: An acquisition module, which is used to acquire the cable working information and the historical power supply load data; A prediction module, which is used to predict the current cable load capacity and the expected overload time; A calculation module, which is used to calculate the remaining load and the power supply gap; An execution module, which is used to execute the optimal power supply plan.

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