Regulation and control method and regulation and control system for new energy storage system based on scheduling demand curve

Abstract

The invention relates to a new energy storage system regulation and control method and system based on a scheduling demand curve. The method comprises the steps that a storage battery in a high energy storage state is selected to be put into a system for power supply according to an operation state, and a storage battery in a low energy storage state is put out of the system for charging; acquiring a dispatching demand curve of the power grid and power supply capacity of the new energy storage system, wherein the power supply capacity comprises current power supply capacity and predicted power supply capacity; calculating continuous power supply duration according to the dispatching demand curve of the power grid and the power supply capacity of the new energy storage system, continuously outputting electric energy to the power grid within the power supply duration, and automatically switching out from the charging state after the storage battery is fully charged. According to the new energy storage system regulation and control method and system based on the scheduling demand curve disclosed by the invention, the electric energy supply capability of the new energy storage system is evaluated, and the demand of the power grid is dynamically matched, so that the stability of the power grid is ensured, and meanwhile, the electric energy stored in the new energy storage system can be fully utilized.

Description

Technical Field

[0001] This application relates to the technical field of new energy energy storage, and in particular to a regulation method and a regulation system for a new energy energy storage system based on a scheduling demand curve. Background Art

[0002] Green new energy sources such as photovoltaic power generation and wind power generation will have a great impact on the stable operation of the power grid due to their inherent randomness and intermittency characteristics. It is required that the power grid has stronger flexibility and adaptability, and at the same time provides the ability to respond quickly, transmit efficiently and regulate electric energy effectively to handle unstable power input.

[0003] The new energy energy storage system can suppress the power imbalance in the system and play an energy buffering role. At the same time, the wide application of energy storage technology will greatly enhance the power grid's acceptance capacity for large-scale renewable energy, enabling the electric energy generated by new energy power stations to be fully utilized.

[0004] However, it is necessary to focus on the instability of the power generation power of new energy power stations and the instability of the power grid terminal demand here. How to make the two dynamically match still needs further research. Summary of the Invention

[0005] This application provides a regulation method and a regulation system for a new energy energy storage system based on a scheduling demand curve. By evaluating the power supply capacity of the new energy energy storage system and dynamically matching the demand of the power grid, while ensuring the stability of the power grid, the electric energy stored in the new energy energy storage system can be fully utilized.

[0006] The above object of this application is achieved through the following technical solutions: In a first aspect, this application provides a regulation method for a new energy energy storage system based on a scheduling demand curve, including: Evaluating the operating states of the storage batteries in the new energy energy storage system, and according to the operating states, selecting the storage batteries in the high energy storage state to be put into the system for power supply, and putting the storage batteries in the low energy storage state out of the system for charging; Obtaining the scheduling demand curve of the power grid and the power supply capacity of the new energy energy storage system, where the power supply capacity includes the current power supply capacity and the predicted power supply capacity; Calculating the continuous power supply duration according to the scheduling demand curve of the power grid and the power supply capacity of the new energy energy storage system; and Continuously outputting electric energy to the power grid within the power supply duration; Wherein, after the storage battery is fully charged, it automatically cuts out from the charging state.

[0007] In a possible implementation manner of the first aspect, the current power supply capacity is the remaining power of the storage batteries in the new energy energy storage system; The expected power supply capacity is the power received by the new energy energy storage system in a future time period, and the power received by the new energy energy storage system in the future time period is given by a prediction model matched with the new energy power station.

[0008] In a possible implementation manner of the first aspect, it further includes: Obtain the voltage change curve of the new energy power station; Generate a charging curve according to the voltage change curve and use the charging curve to crop the voltage change curve to obtain a stable voltage change curve and an unstable voltage change curve; Send the electric energy corresponding to the stable voltage change curve into the charging group and send the electric energy corresponding to the unstable voltage change curve into the emergency group or release it; Wherein, the storage battery includes a charging group, a discharging group and an emergency group; When the remaining power of the storage battery in the discharging group is less than the first threshold, it is transferred to the charging group; When the remaining power of the storage battery in the discharging group is greater than the first threshold and less than the second threshold, it is transferred to the emergency group when a demand occurs.

[0009] In a possible implementation manner of the first aspect, generating a charging curve according to the voltage change curve includes: Determine the zero point of the voltage change curve and the time interval between two adjacent zero points in the sequence; Crop the received voltage change curve of the new energy power station using the time interval to obtain voltage change curve segments; Generate a charging curve, which includes charging curve segments connected in sequence, and the two ends of the charging curve segment coincide with the two ends of the corresponding voltage change curve segment; Wherein, the area of the overlapping region between the charging curve segment and the corresponding voltage change curve segment is less than or equal to the set area; In the sequence, the shape of the latter charging curve segment is adjusted according to the shape of the previous charging curve segment.

[0010] In a possible implementation manner of the first aspect, when the adjustment quantity of the charging curve segments in the sequence is greater than or equal to the required quantity or the cumulative value of the adjustment amplitude is greater than or equal to the required cumulative value, at least one storage battery in the discharging group is transferred to the charging group; The remaining power of the storage battery is greater than the first threshold and less than the second threshold.

[0011] In a possible implementation manner of the first aspect, during the process of continuously outputting electric energy to the power grid within the power supply duration, when the power grid voltage fluctuates, it further includes: Continuously obtain the power grid voltage and calculate the fluctuation degree of the power grid voltage; When the fluctuation time length, the cumulative fluctuation area, or the fluctuation amplitude of the fluctuation degree reaches the triggering condition, the compensation for the grid voltage starts.

[0012] In a possible implementation manner of the first aspect, the compensation for the grid voltage includes: Calculating the fluctuation curve of the grid voltage in time, where the fluctuation curve includes a positive cumulative fluctuation value and a negative cumulative fluctuation value; Generating a fluctuation compensation curve based on the fluctuation curve, where the fluctuation curve and the fluctuation compensation curve are symmetric about the horizontal line passing through the starting and ending points of the fluctuation curve; Generating an actual compensation curve based on the fluctuation compensation curve, and the generation method of the actual compensation curve is as follows: Segmenting the fluctuation compensation curve, where the time length of each segment of the fluctuation compensation curve is negatively correlated with the fluctuation degree; Establishing fluctuation points on both sides of the fluctuation compensation curve, where the minimum straight-line distance between the fluctuation points and the fluctuation compensation curve is positively correlated with the fluctuation degree; Using the fluctuation points to correct the fluctuation compensation curve to obtain the actual compensation curve. During the correction, the points on the fluctuation compensation curve corresponding to the fluctuation points are moved to coincide with the fluctuation points. During this process, the shape of the fluctuation compensation curve changes with the movement of the points corresponding to the fluctuation points and is differentiable everywhere.

[0013] In the second aspect, the present application provides a control device for a new energy energy storage system based on a scheduling demand curve, including: An evaluation unit, configured to evaluate the operating states of the storage batteries in the new energy energy storage system, and select the storage batteries in the high energy storage state to be put into the system for power supply and the storage batteries in the low energy storage state to be taken out of the system for charging according to the operating states; A data acquisition unit, configured to acquire the scheduling demand curve of the power grid and the power supply capacity of the new energy energy storage system, where the power supply capacity includes the current power supply capacity and the predicted power supply capacity; A data calculation unit, configured to calculate the continuous power supply duration according to the scheduling demand curve of the power grid and the power supply capacity of the new energy energy storage system; and An electric energy output unit, configured to continuously output electric energy to the power grid within the power supply duration; Wherein, after the storage battery is fully charged, it automatically cuts out from the charging state.

[0014] In the third aspect, the present application provides a control system for a new energy energy storage system based on a scheduling demand curve, and the system includes: One or more memories, configured to store instructions; and One or more processors, configured to call and run the instructions from the memory and execute the method described in the first aspect and any possible implementation manner of the first aspect.

[0015] Fourthly, the present application provides a computer-readable storage medium, which includes: a program that, when run by a processor, executes the method as described in the first aspect and any possible implementation manners of the first aspect.

[0016] Fifthly, the present application provides a computer program product, including program instructions that, when run by a computing device, execute the method as described in the first aspect and any possible implementation manners of the first aspect.

[0017] Sixthly, the present application provides a chip system, which includes a processor for implementing the functions involved in the above aspects, for example, generating, receiving, sending, or processing the data and / or information involved in the above method.

[0018] The chip system may be composed of chips or may include chips and other discrete devices.

[0019] In a possible design, the chip system further includes a memory for storing necessary program instructions and data. The processor and the memory may be decoupled and separately disposed on different devices and connected by wire or wirelessly, or the processor and the memory may also be coupled on the same device. Description of the Drawings

[0020] Figure 1 is a schematic block diagram of the steps of a regulation method for a new energy energy storage system based on a scheduling demand curve provided by the present application.

[0021] Figure 2 is a schematic diagram of the connectivity of storage batteries in a new energy energy storage system provided by the present application.

[0022] Figure 3 is a schematic diagram of dividing a scheduling demand curve provided by the present application.

[0023] Figure 4 is a schematic diagram of dividing the power output of a new energy power station provided by the present application.

[0024] Figure 5 is a schematic diagram of the principle of achieving stable power output provided by the present application.

[0025] Figure 6 is a schematic diagram of the principle of generating a charging curve according to a voltage change curve provided by the present application.

[0026] Figure 7 is a schematic diagram of the principle of obtaining a fluctuation compensation curve provided by the present application.

[0027] Figure 8 This is a schematic diagram of the principle for obtaining the actual compensation curve provided by this application. Specific implementation manners

[0028] The technical solutions in this application will be further described in detail below with reference to the accompanying drawings.

[0029] This application discloses a regulation method for a new energy energy storage system based on a scheduling demand curve. Please refer to Figure 1 In some examples, the regulation method for the new energy energy storage system based on the scheduling demand curve disclosed in this application includes the following steps: S101, evaluate the operating states of the storage batteries in the new energy energy storage system, and select the storage batteries in the high energy storage state to be put into the system for power supply according to the operating states, and put the storage batteries in the low energy storage state out of the system for charging; S102, obtain the scheduling demand curve of the power grid and the power supply capacity of the new energy energy storage system, and the power supply capacity includes the current power supply capacity and the predicted power supply capacity; S103, calculate the continuous power supply duration according to the scheduling demand curve of the power grid and the power supply capacity of the new energy energy storage system; and S104, continuously output electric energy to the power grid within the power supply duration; Among them, after the storage battery is fully charged, it automatically cuts out from the charging state.

[0030] First of all, it should be noted that the regulation method for the new energy energy storage system based on the scheduling demand curve disclosed in this application is applied to a controller or a server. For the convenience of description, it is hereinafter collectively referred to as the controller. As a bridge between the new energy energy storage system and the power grid, the controller is responsible for the communication between the new energy energy storage system and the power grid and issuing corresponding working instructions to the new energy energy storage system.

[0031] In step S101, the controller first evaluates the operating states of the storage batteries in the new energy energy storage system, and selects the storage batteries in the high energy storage state to be put into the system for power supply according to the operating states, and put the storage batteries in the low energy storage state out of the system for charging.

[0032] In this step, the main thing to evaluate is the state of each storage battery in the new energy energy storage system. The electric quantity in the storage battery is high or low. Here, they are respectively referred to as the high energy storage state and the low energy storage state. For the processing methods of the two states, the storage batteries in the high energy storage state are put into the system for power supply, and the storage batteries in the low energy storage state are put out of the system for charging, as Figure 2 shown.

[0033] In Figure 2There are two busbars. One busbar is responsible for input (charging), and the other busbar is responsible for output (discharging). The operations of the two busbars do not affect each other. The advantage of this method is that it can enable the new energy energy storage system to accommodate the electric energy generated by the new energy energy storage system and provide stable power supply to the power grid simultaneously.

[0034] In step S102, the dispatching demand curve of the power grid and the power supply capacity of the new energy energy storage system will be obtained. The dispatching demand of the power grid refers to the total amount of electric energy required by the power grid. The power supply capacity of the new energy energy storage system includes the current power supply capacity and the predicted power supply capacity.

[0035] The current power supply capacity refers to the total amount of electric energy actually stored in the new energy energy storage system currently, or described as the remaining power of each storage battery in the new energy energy storage system.

[0036] The predicted power supply capacity refers to the total amount of electric energy that the new energy energy storage system is predicted to obtain in the future. The amount of electricity received by the new energy energy storage system in the future time period is given by a prediction model matched with the new energy power station.

[0037] For example, if the total amount of electric energy required by the power grid is D1 and the predicted power supply duration is T1, then the predicted power supply capacity of the new energy energy storage system at this time is the total amount of electric energy generated by the new energy energy storage system that can be obtained within a time period of T1.

[0038] The combination of the current power supply capacity and the predicted power supply capacity is the total amount of electric energy that the new energy energy storage system can provide within a time period of T1. Through this method, the power supply capacity of the new energy energy storage system can be accurately matched with the dispatching demand of the power grid.

[0039] In the actual application scenario, the dispatching demand of the power grid is a curve, which can be called the dispatching demand curve here. Then, based on the dispatching demand curve, the power supply capacity of the new energy energy storage system can be matched with the dispatching demand of the power grid, which is the content in step S103.

[0040] In step S104, electric energy will be continuously output to the power grid within the power supply duration. There are three situations for the matching between the dispatching demand of the power grid and the power supply capacity of the new energy energy storage system: greater than, equal to, and less than. When the matching result is greater than, other methods of power input can be prepared in advance to stabilize the power grid.

[0041] Here, several issues need to be explained as follows: The values of the dispatching demand curve are different at different time points. Therefore, the power supply capacity of the new energy energy storage system needs to be adjusted synchronously with the dispatching demand curve. In some possible implementation methods, the parts in the power grid that can provide stable power supply, such as thermal power generation, are responsible for basic power supply, and the power of the basic power supply is stable.

[0042] The new energy storage system in this application provides fluctuating power supply, and the power of the fluctuating part (based on the basic power supply) coincides with the dispatching demand curve, as Figure 3 shown.

[0043] It is necessary to calculate the continuous power supply duration according to the dispatching demand curve of the power grid and the power supply capacity of the new energy storage system. When the continuous power supply duration is less than the dispatching demand time of the power grid, it is necessary to coordinate the injection of supplementary electric energy in other ways. Or, a basic power supply method is adopted to provide stable power, while the new energy storage system provides dynamic power.

[0044] After the storage battery is fully charged, it automatically cuts out from the charging state and switches to the discharging state when needed. That is, in this application, the storage battery has three states: charging state, discharging state, and waiting state. The storage battery in the waiting state is in a fully charged state.

[0045] When all the storage batteries in the new energy storage system are in the fully charged state and it is impossible to coordinate a storage battery to enter the charging state, the electric energy generated by the new energy power station needs to be temporarily discarded.

[0046] As mentioned above, the electric energy generated by the new energy power station is unstable, and the unstable electric energy input will cause insufficient charging power of the storage battery. To solve this problem, this application uses the following method for processing: S201, obtain the voltage change curve of the new energy power station; S202, generate a charging curve according to the voltage change curve and use the charging curve to cut the voltage change curve to obtain a stable voltage change curve and an unstable voltage change curve; S203, send the electric energy corresponding to the stable voltage change curve into the charging group and send the electric energy corresponding to the unstable voltage change curve into the emergency group or release it.

[0047] In steps S201 to S203, the voltage change curve of the new energy power station will be obtained first, and then a charging curve will be generated according to the voltage change curve and the voltage change curve will be cut with the charging curve to obtain a stable voltage change curve and an unstable voltage change curve. Here, it can also be described as that the power output of the new energy power station is divided into two parts: stable power output and unstable power output, as Figure 4 shown.

[0048] For the processing method of stable power output and unstable power output, the electric energy corresponding to the stable voltage change curve is sent into the charging group, and the electric energy corresponding to the unstable voltage change curve is sent into the emergency group or released. Releasing means sending it into the ground for discarding.

[0049] The advantage of this method is that the obtained stable power output can maximize the charging power of the battery. The specific implementation method is to use a power shunt circuit. The power shunt circuit has two outputs, namely stable power output and unstable power output.

[0050] See also Figure 5 The circuit inside the power split circuit realizes the division of the power output of the new energy power station into two parts: stable power output and unstable power output through high-frequency on-off (SPWM control mode, PWM control mode).

[0051] In this treatment method, the battery includes a charging group, a discharging group and an emergency group. The specific working method is: When the remaining power of the battery in the discharge group is less than a first threshold, the battery is transferred to the charging group; When the remaining power of the battery in the discharge group is greater than the first threshold and less than the second threshold, it is transferred to the emergency group when demand occurs. The function of the emergency group is to absorb unstable power output.

[0052] It should be understood that for a battery, the charging speed will decrease when it is in a low power state (for example, less than or equal to 20%) or a high power state (for example, greater than or equal to 80%), and it will be difficult to absorb the unstable power output at this time.

[0053] However, when the remaining power of the battery is greater than the first threshold (for example, 20%) and less than the second threshold (for example, 80%), the chemical substances inside the battery are in an active state and have the ability to absorb unstable power output.

[0054] Of course, at this time, the unstable power output also needs to be processed secondary to choose storage or release.

[0055] In some examples, the specific secondary processing is to limit the maximum power and the minimum power of the unstable power output, and send the unstable power output between the maximum power and the minimum power to the emergency group for storage, and the unstable power output greater than the maximum power and less than the minimum power is selected for release (discard) processing.

[0056] In some examples, generating a charging curve according to the voltage variation curve includes: Determine the zero point of the voltage variation curve and the time interval between two adjacent zero points in the sequential sequence; The received voltage variation curve of the renewable energy power station is cut using time intervals to obtain voltage variation curve segments; Generate a charging curve, the charging curve comprising sequentially connected charging curve segments, where two ends of the charging curve segment coincide with two ends of the corresponding voltage change curve segment; Among them, the area of the overlapping region between the charging curve segment and the corresponding voltage change curve segment is less than or equal to the set area; On the sequential sequence, the shape of the subsequent charging curve segment is adjusted according to the shape of the previous charging curve segment.

[0057] In this method, please refer to Figure 6 , and processing will be carried out according to the numerical changes of the voltage change curve. The specific method is to determine the zero point of the voltage change curve and the time interval between two adjacent zero points on the sequential sequence, and then divide the voltage change curve into voltage change curve segments, with both ends of the voltage change curve segment being zero points.

[0058] Then charging curve segments are generated. The two ends of the charging curve segment coincide with the two ends of the corresponding voltage change curve segment, and it is required that the area of the overlapping region between the charging curve segment and the corresponding voltage change curve segment is less than or equal to the set area. The charging curve consists of sequentially connected charging curve segments, that is, after obtaining the charging curve segments, these charging curve segments will be sequentially connected together, and at this time, the obtained is the charging curve.

[0059] In some possible implementation manners, when the adjustment quantity of the charging curve segments on the sequential sequence is greater than or equal to the required quantity or the cumulative value of the adjustment amplitude is greater than or equal to the required cumulative value, at least one storage battery in the discharge group is transferred to the charging group. This method is to cope with the instability of the charging curve and requires coordinating to increase the number of storage batteries in the charging group.

[0060] The more the number of storage batteries in the charging group, the easier it is to cope with the instability of the charging curve. At this time, it is necessary to coordinate so that the remaining power of the storage battery is greater than the first threshold and less than the second threshold to ensure that all the storage batteries in the charging group are in a relatively high active state.

[0061] When the power of the storage battery in the charging group reaches the second threshold, it will be transferred to the discharge group, and then again, a storage battery with a remaining power greater than the first threshold and less than the second threshold is selected from the discharge group to enter the charging group.

[0062] It should be noted that this method is suitable for the new energy power station to output alternating current. For the processing method of the new energy power station to output direct current, as follows: The voltage change curve of the new energy power station received is cut using a time interval to obtain a voltage change curve segment; A charging curve is generated. The charging curve includes sequentially connected charging curve segments, and the start time and end time of the charging curve segment are the same as those of the corresponding voltage change curve segment; Among them, the area of the overlapping region between the charging curve segment and the corresponding voltage change curve segment is less than or equal to the set area; On the sequential sequence, the shape of the subsequent charging curve segment is adjusted according to the shape of the previous charging curve segment.

[0063] Specifically, in this processing method, the voltage change curve of the new energy power station is a line with changing amplitude. After segmentation processing, it is required that the area of the overlapping region between the charging curve segment and the corresponding voltage change curve segment is less than or equal to the set area.

[0064] The amplitude of the latter charging curve segment should refer to the amplitude of the previous charging curve segment. In this process, there are two situations for the previous charging curve segment: meeting the requirements (the area of the overlapping region between the charging curve segment and the corresponding voltage change curve segment is less than or equal to the set area) and not meeting the requirements. When the previous charging curve segment does not meet the requirements, the amplitude of the latter charging curve segment is adjusted accordingly.

[0065] It should be understood that the dispatching demand curve is generated based on historical data and is representative. However, it cannot fully predict power consumption. When the power consumption suddenly increases, there will be a power gap, and at this time, the new energy energy storage system needs to take corresponding actions.

[0066] In some examples, during the process of continuously outputting electric energy to the power grid within the power supply duration, when the power grid voltage fluctuates, the following method is used for processing: S301, continuously obtain the power grid voltage and calculate the fluctuation degree of the power grid voltage; S302, when the fluctuation time length or the fluctuation cumulative area or the fluctuation amplitude of the fluctuation degree reaches the trigger condition, start to compensate the power grid voltage.

[0067] In steps S301 and S302, it is judged whether to compensate the power grid voltage according to the fluctuation degree of the power grid voltage. There are three trigger conditions: the fluctuation time length of the fluctuation degree reaches the trigger condition, the fluctuation cumulative area (set time length) reaches the trigger condition, and the fluctuation amplitude reaches the trigger condition.

[0068] Please refer to Figure 7 , and the method for compensating the power grid voltage is: Calculate the fluctuation curve of the power grid voltage in time, and the fluctuation curve includes the positive cumulative fluctuation value and the negative cumulative fluctuation value; Generate a fluctuation compensation curve according to the fluctuation curve, and the fluctuation curve and the fluctuation compensation curve are symmetric about the horizontal line passing through the start and end points of the fluctuation curve; Generate an actual compensation curve according to the fluctuation compensation curve.

[0069] It should be noted here that there are two types of fluctuations in the power grid voltage: increase and decrease. The processing method for increase is to input a part of the electric energy into the new energy energy storage system, and the compensation method for decrease is that the new energy energy storage system outputs additional electric energy to the power grid.

[0070] The generation method of the actual compensation curve is: Segment the fluctuation compensation curve, and the time length of each segment of the fluctuation compensation curve is negatively correlated with the fluctuation degree; Establish fluctuation points on both sides of the fluctuation compensation curve, and the minimum straight-line distance between the fluctuation points and the fluctuation compensation curve is positively correlated with the fluctuation degree; Please refer to Figure 8 , and use the fluctuation points to correct the fluctuation compensation curve to obtain the actual compensation curve. During the correction, the points on the fluctuation compensation curve corresponding to the fluctuation points are moved to coincide with the fluctuation points. During this process, the shape of the fluctuation compensation curve changes with the movement of the points corresponding to the fluctuation points and is differentiable everywhere.

[0071] The actual compensation curve generated in this way can make the actual compensation curve fit the fluctuation curve of the grid voltage over time as much as possible. Because the data acquisition method for the fluctuation curve of the grid voltage over time is a real-time acquisition method, that is, there is a certain degree of unpredictability in the changes of the fluctuation curve in subsequent time.

[0072] Regarding the fluctuation degree, there are two judgment methods: the area accumulation method per unit time and the amplitude of the slope change. There are multiple fixed values in both judgment methods, and each fixed value corresponds to a fluctuation degree.

[0073] By using the method of correcting the fluctuation compensation curve with the fluctuation points, a large number of coincidence points can be obtained between the obtained fluctuation compensation curve and the fluctuation curve of the grid voltage over time, that is, the coincidence degree between the two is very high, and dynamic compensation for the fluctuation curve of the grid voltage over time can be realized.

[0074] This application also provides a control device for a new energy energy storage system based on a dispatching demand curve, including: An evaluation unit for evaluating the operating status of each storage battery in the new energy energy storage system, and selecting the storage battery in a high energy storage state to be put into the system for power supply and the storage battery in a low energy storage state to be taken out of the system for charging according to the operating status; A data acquisition unit for acquiring the dispatching demand curve of the power grid and the power supply capacity of the new energy energy storage system, where the power supply capacity includes the current power supply capacity and the expected power supply capacity; A data calculation unit for calculating the continuous power supply duration according to the dispatching demand curve of the power grid and the power supply capacity of the new energy energy storage system; and An electric energy output unit for continuously outputting electric energy to the power grid during the power supply duration; Among them, the storage battery automatically cuts out from the charging state after being fully charged.

[0075] Furthermore, the current power supply capacity is the remaining power of each storage battery in the new energy energy storage system; The expected power supply capacity is the power received by the new energy energy storage system in a future time period, and the power received by the new energy energy storage system in the future time period is given by a prediction model matching the new energy power station.

[0076] Furthermore, it also includes: A first acquisition unit for acquiring the voltage change curve of the new energy power station; A first processing unit for generating a charging curve according to the voltage change curve and using the charging curve to crop the voltage change curve to obtain a stable voltage change curve and an unstable voltage change curve; A shunt unit for sending the electric energy corresponding to the stable voltage change curve into the charging group and sending the electric energy corresponding to the unstable voltage change curve into the emergency group or releasing it; Among them, the storage battery includes a charging group, a discharging group, and an emergency group; When the remaining power of the storage battery in the discharging group is less than the first threshold, it is transferred to the charging group; When the remaining power of the storage battery in the discharging group is greater than the first threshold and less than the second threshold, it is transferred to the emergency group when a demand occurs.

[0077] Furthermore, it also includes: A second processing unit for determining the zero point of the voltage change curve and the time interval between two adjacent zero points in the sequence; A third processing unit for cropping the received voltage change curve of the new energy power station using the time interval to obtain a voltage change curve segment; A fourth processing unit for generating a charging curve, where the charging curve includes sequentially connected charging curve segments, and the two ends of the charging curve segment coincide with the two ends of the corresponding voltage change curve segment; Among them, the area of the overlapping region between the charging curve segment and the corresponding voltage change curve segment is less than or equal to the set area; In the sequence, the shape of the subsequent charging curve segment is adjusted according to the shape of the previous charging curve segment.

[0078] Furthermore, when the adjustment quantity of the charging curve segments in the sequence is greater than or equal to the required quantity or the cumulative value of the adjustment amplitude is greater than or equal to the required cumulative value, at least one storage battery in the discharging group is transferred to the charging group; The remaining power of the storage battery is greater than the first threshold and less than the second threshold.

[0079] Furthermore, it also includes: A second acquisition unit for continuously acquiring the grid voltage and calculating the fluctuation degree of the grid voltage; A compensation unit for starting to compensate the grid voltage when the fluctuation time length or the fluctuation cumulative area or the fluctuation amplitude of the fluctuation degree reaches the trigger condition.

[0080] Further, it further includes: A fifth processing unit, configured to calculate a fluctuation curve of the grid voltage over time, where the fluctuation curve includes a positive cumulative fluctuation value and a negative cumulative fluctuation value; A sixth processing unit, configured to generate a fluctuation compensation curve according to the fluctuation curve, where the fluctuation curve and the fluctuation compensation curve are symmetric about a horizontal line passing through the start and end points of the fluctuation curve; A seventh processing unit, configured to generate an actual compensation curve according to the fluctuation compensation curve.

[0081] Further, it further includes: An eighth processing unit, configured to segment the fluctuation compensation curve, where the time length of each segment of the fluctuation compensation curve is negatively correlated with the fluctuation degree; A ninth processing unit, configured to establish fluctuation points on both sides of the fluctuation compensation curve, where the minimum straight-line distance between the fluctuation points and the fluctuation compensation curve is positively correlated with the fluctuation degree; A tenth processing unit, configured to use the fluctuation points to correct the fluctuation compensation curve to obtain the actual compensation curve. During the correction, the points on the fluctuation compensation curve corresponding to the fluctuation points are moved to coincide with the fluctuation points, and during this process, the shape of the fluctuation compensation curve changes with the movement of the points corresponding to the fluctuation points and is differentiable everywhere.

[0082] In an example, the units in any of the above devices can be one or more integrated circuits configured to implement the above methods. For example: one or more application specific integrated circuits (ASICs), or, one or more digital signal processors (DSPs), or, one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0083] Again, when the units in the device can be implemented in the form of a processing element scheduler, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call programs. Again, these units can be integrated together to be implemented in the form of a system-on-a-chip (SOC).

[0084] In this application, names may be assigned to various objects such as various messages / information / devices / network elements / systems / devices / actions / operations / processes / concepts, etc. It can be understood that these specific names do not constitute a limitation on the relevant objects, and the assigned names may change with factors such as scenarios, contexts, or usage habits. The understanding of the technical meaning of the technical terms in this application should be mainly determined from the functions and technical effects reflected / executed in the technical solutions.

[0085] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0086] In several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0087] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0088] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application.

[0089] It should also be understood that in each embodiment of this application, the first, second, etc. are only used to indicate that multiple objects are different. For example, the first time window and the second time window are only used to indicate different time windows. And it should not have any impact on the time window itself. The above first, second, etc. should not impose any restrictions on the embodiments of this application.

[0090] It should also be understood that in various embodiments of the present application, without special instructions and logical conflicts, the terms and / or descriptions between different embodiments are consistent and can be cross-referenced. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0091] If the above-mentioned function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a computer-readable storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned computer-readable storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0092] The present application also provides a control system for a new energy energy storage system based on a scheduling demand curve. The system includes: One or more memories for storing instructions; and One or more processors for calling and running the instructions from the memory and executing the methods described above.

[0093] The present application also provides a computer program product. The computer program product includes instructions that, when executed, cause the control system (terminal device and network device) to perform operations corresponding to the control system (terminal device and network device) of the above method.

[0094] The present application also provides a chip system. The chip system includes a processor for implementing the functions involved above. For example, generating, receiving, sending, or processing the data and / or information involved in the above method.

[0095] The chip system can be composed of chips or can include chips and other discrete devices.

[0096] The processor mentioned anywhere above can be a CPU, a microprocessor, an ASIC, or an integrated circuit for controlling the execution of a program for the method of transmitting the above-mentioned feedback information.

[0097] In a possible design, the chip system further includes a memory for storing necessary program instructions and data. The processor and the memory can be decoupled and disposed on different devices respectively, and connected by wired or wireless means to support the chip system to implement various functions in the above embodiments. Alternatively, the processor and the memory can also be coupled on the same device.

[0098] Optionally, the computer instructions are stored in the memory.

[0099] Optionally, the memory is a storage unit within the chip, such as a register, a cache, etc. The memory can also be a storage unit outside the chip within the terminal, such as a ROM or other types of static storage devices that can store static information and instructions, a RAM, etc.

[0100] It can be understood that the memory in this application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.

[0101] The non-volatile memory can be a ROM, a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory.

[0102] The volatile memory can be a RAM, which is used as an external cache. There are various different types of RAM, such as a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synch link dynamic random access memory (SLDRAM), and a direct memory bus random access memory.

[0103] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A regulation method for a new energy energy storage system based on a scheduling demand curve, characterized in that Including: Evaluating the operating states of the storage batteries in the new energy storage system, and selecting the storage batteries in the high energy storage state to be put into the system for power supply according to the operating states, and putting the storage batteries in the low energy storage state out of the system for charging; Obtaining the dispatching demand curve of the power grid and the power supply capacity of the new energy storage system, where the power supply capacity includes the current power supply capacity and the predicted power supply capacity; Calculating the continuous power supply duration according to the dispatching demand curve of the power grid and the power supply capacity of the new energy storage system; And Continuously outputting electric energy to the power grid within the power supply duration; Wherein, after the storage battery is fully charged, it automatically cuts out from the charging state.

2. The regulation method of the new energy energy storage system based on the scheduling demand curve according to claim 1, wherein The current power supply capacity is the remaining power of each storage battery in the new energy storage system; The predicted power supply capacity is the power received by the new energy storage system in the future time period, and the power received by the new energy storage system in the future time period is given by a prediction model matched with the new energy power station.

3. The regulation method of the new energy energy storage system based on the scheduling demand curve according to claim 1, characterized in that It also includes: Obtaining the voltage change curve of the new energy power station; Generating a charging curve according to the voltage change curve and using the charging curve to cut the voltage change curve to obtain a stable voltage change curve and an unstable voltage change curve; Sending the electric energy corresponding to the stable voltage change curve into the charging group and sending the electric energy corresponding to the unstable voltage change curve into the emergency group or releasing it; Wherein, the storage battery includes a charging group, a discharging group and an emergency group; When the remaining power of the storage battery in the discharging group is less than the first threshold, it transfers to the charging group; When the remaining power of the storage battery in the discharging group is greater than the first threshold and less than the second threshold, it transfers to the emergency group when the demand appears.

4. The regulation method of the new energy energy storage system based on the scheduling demand curve according to claim 3, characterized in that, Generating a charging curve according to the voltage change curve includes: Determining the zero point of the voltage change curve and the time interval between two adjacent zero points in the sequence; Cutting the received voltage change curve of the new energy power station using the time interval to obtain a voltage change curve segment; Generating a charging curve, where the charging curve includes sequentially connected charging curve segments, and the two ends of the charging curve segment coincide with the two ends of the corresponding voltage change curve segment; Wherein, the area of the overlapping region between the charging curve segment and the corresponding voltage change curve segment is less than or equal to the set area; In the sequence, the shape of the latter charging curve segment is adjusted according to the shape of the previous charging curve segment.

5. The regulation method of the new energy energy storage system based on the scheduling demand curve according to claim 4, characterized in that, When the adjustment quantity of the charging curve segments in the sequence is greater than or equal to the required quantity or the cumulative value of the adjustment amplitude is greater than or equal to the required cumulative value, at least one storage battery in the discharging group is transferred to the charging group; The remaining power of the storage battery is greater than the first threshold and less than the second threshold.

6. The regulation method of the new energy energy storage system based on the scheduling demand curve according to claim 1, characterized in that, During the process of continuously outputting electric energy to the power grid within the power supply duration, when the power grid voltage fluctuates, it also includes: Continuously obtaining the power grid voltage and calculating the fluctuation degree of the power grid voltage; When the fluctuation time length or the fluctuation cumulative area or the fluctuation amplitude of the fluctuation degree reaches the trigger condition, starting to compensate the power grid voltage.

7. The control method of the new energy energy storage system based on the scheduling demand curve according to claim 6, characterized in that, Compensating the power grid voltage includes: Calculating the fluctuation curve of the power grid voltage in time, where the fluctuation curve includes a positive cumulative fluctuation value and a negative cumulative fluctuation value; Generating a fluctuation compensation curve according to the fluctuation curve, and the fluctuation curve and the fluctuation compensation curve are symmetric about the horizontal line passing through the start and end points of the fluctuation curve; Generating an actual compensation curve according to the fluctuation compensation curve, and the generation method of the actual compensation curve is: Segment the fluctuation compensation curve, and the time length of each segment of the fluctuation compensation curve is negatively correlated with the degree of fluctuation; Establish fluctuation points on both sides of the fluctuation compensation curve respectively, and the minimum linear distance between the fluctuation points and the fluctuation compensation curve is positively correlated with the degree of fluctuation; Use the fluctuation points to correct the fluctuation compensation curve to obtain the actual compensation curve. During the correction, the points on the fluctuation compensation curve corresponding to the fluctuation points move to coincide with the fluctuation points. During this process, the shape of the fluctuation compensation curve changes with the movement of the points corresponding to the fluctuation points and is differentiable everywhere.

8. A control device for a new energy energy storage system based on a scheduling demand curve, characterized in that, It includes: An evaluation unit for evaluating the operating states of the storage batteries in the new energy energy storage system, and selecting the storage batteries in the high energy storage state to be put into the system for power supply and the storage batteries in the low energy storage state to be taken out of the system for charging according to the operating states; A data acquisition unit for acquiring the dispatching demand curve of the power grid and the power supply capacity of the new energy energy storage system, and the power supply capacity includes the current power supply capacity and the predicted power supply capacity; A data calculation unit for calculating the continuous power supply duration according to the dispatching demand curve of the power grid and the power supply capacity of the new energy energy storage system; And A power output unit for continuously outputting electric energy to the power grid within the power supply duration; Wherein, after the storage battery is fully charged, it automatically cuts out from the charging state.

9. A control system for a new energy energy storage system based on a scheduling demand curve, characterized in that, The system includes: One or more memories for storing instructions; and One or more processors for calling and running the instructions from the memory and executing the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes: A program, when the program is run by the processor, the method according to any one of claims 1 to 7 is executed.

Images