Power supply vehicle energy storage unit control method and system based on multi-energy storage unit cooperation

Abstract

The application relates to the technical field of power regulation, and relates to a power supply vehicle energy storage unit control method and system based on cooperation of multiple energy storage units, which comprises the following steps: detecting the power direction according to an original grid connection point to obtain a current power direction; if the current power direction is a reverse direction, calculating the power value of the original grid connection point to obtain a reverse power value; if the reverse power value is greater than a standard reverse power value, determining the reverse power dominant property based on the original grid connection point; and adjusting the parameters of the original grid connection point according to the reverse power dominant property and a driving control module to obtain an adjusted grid connection point. The application can improve the accuracy and response speed of reverse power suppression in the energy storage process of the power supply vehicle, and can enhance the stability of the grid-connected operation of the energy storage power supply vehicle cluster.

Description

Technical Field

[0001] This invention relates to the field of power regulation technology, and in particular to a control method and system for energy storage units in power vehicles based on the coordinated operation of multiple energy storage units. Background Technology

[0002] With the increasing penetration rate of distributed energy, mobile energy storage vehicle clusters are being used more and more widely in scenarios such as emergency power supply and load peak shaving and valley filling. When multiple energy storage units are connected to the grid in coordination, reverse power phenomenon has become a key factor affecting the stable operation of the system. If the power fed by the energy storage vehicle to the grid exceeds the allowable range, it may cause voltage and frequency fluctuations at the grid connection point, or even cause equipment to disconnect from the grid or be damaged. Therefore, how to quickly and accurately identify reverse power characteristics and implement adaptive adjustment is a core technical requirement to ensure the safe and efficient grid connection of energy storage clusters.

[0003] Traditional technologies typically use a fixed threshold method to determine whether reverse power exceeds the limit. Once it does, the voltage or frequency on the power supply side is adjusted uniformly using a constant step size or proportional-integral controller. The drawback of this method is that it cannot distinguish whether the reverse power is dominated by active power deviation or reactive power deviation, resulting in a lack of targeted adjustment strategy. This can easily lead to over-adjustment or under-adjustment, which in turn causes new active or reactive power disturbances and prolongs the system recovery time. Summary of the Invention

[0004] This invention provides a control method for energy storage units in power vehicles based on multi-energy storage unit collaboration and a computer-readable storage medium. Its main purpose is to improve the accuracy and response speed of reverse power suppression during energy storage in power vehicles and enhance the stability of grid-connected operation of energy storage power vehicle clusters.

[0005] To achieve the above objectives, the present invention provides a control method for a power vehicle energy storage unit based on multi-energy storage unit collaboration, comprising: Receive energy storage control commands, and identify the energy storage power vehicle cluster and the grid side based on the energy storage control commands. The energy storage power vehicle cluster includes multiple energy storage power vehicles. The grid energy storage bus is determined based on the energy storage power vehicle cluster. The original grid connection point is identified based on the grid energy storage bus and the grid side. Power direction detection is performed based on the original grid connection point to obtain the current power direction. The original grid connection point includes the power source side and the grid side. If the current power direction is the preset reverse direction, then the power value is calculated for the original grid connection point to obtain the reverse power value; If the reverse power value is greater than the preset standard reverse power value, the reverse power dominance property is determined based on the original grid connection point, wherein the reverse power dominance property is active power dominance, reactive power dominance, or mixed power dominance. Based on the inverse power dominance property and the pre-built drive control module, the parameters of the original grid connection point are adjusted to obtain the adjusted grid connection point; The reverse power elimination judgment is performed on the grid connection point to obtain the elimination result, where the elimination result is either eliminated or not eliminated; If the elimination result is "eliminated", then the grid connection point will be adjusted as the target grid connection point to complete the control of the power vehicle energy storage unit based on the coordination of multiple energy storage units.

[0006] Optionally, the step of detecting the power direction based on the original grid connection point to obtain the current power direction includes: Three-phase data is collected from the original grid connection point to obtain the current three-phase voltage group and the current three-phase current group. The current three-phase voltage group includes multiple current three-phase voltages, and the current three-phase current group includes multiple current three-phase currents. The current instantaneous power is obtained by calculating the power based on the current three-phase voltage group and the current three-phase current group. The average instantaneous power is obtained by periodically averaging the current instantaneous power. If the average instantaneous power is greater than the preset zero value, the preset positive direction will be recorded as the current power direction; otherwise, the reverse direction will be recorded as the current power direction.

[0007] Optionally, determining the inverse power dominance property based on the original grid connection point includes: Three-phase data are periodically collected from the original grid connection point to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence; A power grayscale image is constructed based on the original instantaneous active power sequence and the original instantaneous reactive power sequence, wherein the size of the power grayscale image is [size missing]. ,in, This represents the quantity of original instantaneous active power in the original instantaneous active power sequence; Power properties are identified using a pre-trained power property identification model and a power grayscale image to obtain active power dominance probability values ​​and reactive power dominance probability values. The power property identification model is a convolutional neural network. The inverse power dominance property is determined based on the active power dominance probability value and the reactive power dominance probability value.

[0008] Optionally, the step of periodically acquiring three-phase data from the original grid connection point to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence includes: Based on the preset original acquisition time, three-phase data are acquired from the original grid connection point to obtain the original three-phase voltage group and the original three-phase current group. The original three-phase voltage group and the original three-phase current group are subjected to coordinate transformation to obtain the original component voltage group and the original component current group. The original component voltage group includes: the first component voltage and the second component voltage, and the original component current group includes: the first component current and the second component current. Power calculations are performed based on the original component voltage group and the original component current group to obtain the original instantaneous active power and the original instantaneous reactive power. If the original acquisition time is less than the preset stop acquisition time, the updated acquisition time is calculated based on the original acquisition time and the preset unit acquisition interval. The updated acquisition time is used as the original acquisition time, and the step of acquiring three-phase data of the original grid connection point based on the preset original acquisition time is returned until the original acquisition time is not less than the stop acquisition time. If the original acquisition time is not less than the acquisition stop time, then the original instantaneous active power and the original instantaneous reactive power are summarized to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence.

[0009] Optionally, determining the inverse power dominance property based on the active power dominance probability value and the reactive power dominance probability value includes: Calculate the dominant property deviation value based on the active power dominance probability value and the reactive power dominance probability value; If the deviation value of the dominant property is not greater than the preset deviation value of the standard property, then the mixed power dominance is recorded as the inverse power dominance property; If the deviation value of the dominant property is greater than the deviation value of the standard property, then the maximum dominant probability value among the active power dominance probability value and the reactive power dominance probability value is determined. If the maximum dominance probability value is the active power dominance probability value, then active power dominance is recorded as inverse power dominance; otherwise, reactive power dominance is recorded as inverse power dominance.

[0010] Optionally, the step of adjusting the parameters of the original grid connection point based on the inverse power dominance property and the pre-built drive control module to obtain the adjusted grid connection point includes: Get the current power supply frequency and voltage on the power supply side, and get the current grid frequency and voltage on the grid side. If the reverse power dominance property is active power dominance, then the current power supply side voltage is recorded as the regulated power supply side voltage; The current power supply side frequency is adjusted by using the current grid side frequency to obtain the adjusted power supply side frequency; If the reverse power dominance property is reactive power dominance, then the current power supply side frequency is recorded as the regulated power supply side frequency. The current power supply side voltage is adjusted by using the current grid side voltage to obtain the adjusted power supply side voltage; If the inverse power dominance property is mixed power dominance, then the current power supply frequency and current power supply voltage are jointly regulated based on the current grid side frequency and current grid side voltage to obtain the regulated power supply side frequency and regulated power supply side voltage. The original grid connection point is adjusted by regulating the power supply side frequency, the power supply side voltage, and the drive control module, thus obtaining the adjusted grid connection point.

[0011] Optionally, adjusting the current power supply side frequency using the current grid side frequency to obtain an adjusted power supply side frequency includes: Obtain the reference power value and adjustment step size; The adjusted power supply side frequency is calculated based on the reference power value, the current grid-side frequency, the adjustment step size, and the current power supply side frequency. The adjusted power supply side frequency is expressed as:

[0012] in, This indicates adjusting the power supply frequency. Indicates the current grid-side frequency. Indicates the current power supply frequency. This represents an exponential function with the natural constant as its base. This indicates taking the absolute value. Indicates the reverse power value. Indicates the reference power value. Indicates the adjustment step size. This represents the preset time constant.

[0013] Optionally, the step of adjusting the current power supply side voltage using the current grid side voltage to obtain an adjusted power supply side voltage includes: Calculate the adjusted power supply voltage using the following formula:

[0014] in, This indicates adjusting the voltage on the power supply side. Indicates the current grid-side voltage. This indicates the current power supply voltage.

[0015] Optionally, the step of jointly adjusting the current power supply side frequency and voltage based on the current grid side frequency and current grid side voltage to obtain the adjusted power supply side frequency and adjusted power supply side voltage includes: The reverse power value is divided based on the active power dominance probability value and the reactive power dominance probability value to obtain the active power reverse power value and the reactive power reverse power value. The frequency of the current power source side is adjusted by using the active reverse power value and the current grid side frequency to obtain the adjusted power source side frequency; The current power supply voltage is adjusted by using the reactive power inverse value and the current grid voltage to obtain the adjusted power supply voltage.

[0016] To achieve the above objectives, the present invention also provides a power vehicle energy storage unit control system based on multi-energy storage unit collaboration, comprising: The power direction detection module is used to receive energy storage control commands, identify the energy storage power vehicle cluster and the grid side based on the energy storage control commands, wherein the energy storage power vehicle cluster includes multiple energy storage power vehicles, determine the grid energy storage bus based on the energy storage power vehicle cluster, confirm the original grid connection point based on the grid energy storage bus and the grid side, and perform power direction detection based on the original grid connection point to obtain the current power direction, wherein the original grid connection point includes: the power source side and the grid side; The dominant property identification module is used to calculate the power value of the original grid connection point and obtain the inverse power value. If the inverse power value is greater than the preset standard inverse power value, the dominant property of the inverse power is determined based on the original grid connection point. The dominant property of the inverse power is active power dominant, reactive power dominant, or mixed power dominant. The grid-connected data adjustment module is used to adjust the parameters of the original grid connection point according to the reverse power dominance and the pre-built drive control module to obtain the adjusted grid connection point; The grid-connected power elimination module is used to determine the reverse power elimination at the grid-connected point and obtain the elimination result, which is either eliminated or not eliminated. If the elimination result is eliminated, the grid-connected point is taken as the target grid-connected point.

[0017] To address the above problems, the present invention also provides an electronic device, the electronic device comprising: Memory, storing at least one instruction; The processor executes the instructions stored in the memory to implement the above-described control method for the energy storage unit of the power vehicle based on the cooperation of multiple energy storage units.

[0018] To address the aforementioned problems, the present invention also provides a computer-readable storage medium storing at least one instruction, which is executed by a processor in an electronic device to implement the aforementioned power vehicle energy storage unit control method based on multi-energy storage unit collaboration.

[0019] To address the problems described in the background section, this invention first detects the power direction based on the original grid connection point to obtain the current power direction. This step, through three-phase data acquisition and periodic averaging, filters out high-frequency fluctuations in instantaneous power and accurately determines the power flow direction. Compared to the traditional single-moment sampling method, this improves the reliability of power direction detection. If the reverse power value is greater than the standard reverse power value, the dominant nature of the reverse power is determined based on the original grid connection point. This step, by constructing a power grayscale image and using a convolutional neural network for identification, can accurately distinguish whether the reverse power is dominated by active power, reactive power, or a mixture of both. This avoids the shortcomings of the traditional fixed threshold method, which cannot distinguish power types, making subsequent adjustments more targeted. Finally, based on the dominant nature of the reverse power and the drive control module, the parameters of the original grid connection point are adjusted to obtain the adjusted grid connection point. This step uses nonlinear dynamic adjustment formulas for frequency or voltage according to different dominant reverse power properties, making the power supply side parameters smoothly approximate the grid side. This achieves rapid suppression of reverse power and prevents secondary disturbances caused by over-adjustment. Compared to the traditional single proportional-integral adjustment method, the adjustment process is more stable and converges faster. Therefore, the present invention can improve the accuracy and response speed of reverse power suppression during the energy storage process of power vehicles, and enhance the stability of the grid-connected operation of energy storage power vehicle clusters. Attached Figure Description

[0020] Figure 1 This is a flowchart illustrating a power vehicle energy storage unit control method based on multi-energy storage unit collaboration, according to an embodiment of the present invention. Figure 2 This is a functional block diagram of a power vehicle energy storage unit control system based on multi-energy storage unit collaboration, provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of an electronic device for implementing the power vehicle energy storage unit control method based on multi-energy storage unit collaboration, according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures: 10. Electronic device; 11. Processor; 12. Memory; 13. Bus.

[0022] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0024] This application provides a control method for the energy storage unit of a power vehicle based on multi-energy storage unit collaboration. The executing entity of this control method includes, but is not limited to, at least one of the following electronic devices that can be configured to execute the method provided in this application: a server, a terminal, etc. In other words, the control method for the energy storage unit of a power vehicle based on multi-energy storage unit collaboration can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0025] Reference Figure 1 The diagram shown is a flowchart illustrating a power vehicle energy storage unit control method based on multi-energy storage unit collaboration according to an embodiment of the present invention. In this embodiment, the power vehicle energy storage unit control method based on multi-energy storage unit collaboration includes: S1. Receive energy storage control commands and identify the energy storage power vehicle cluster and the grid side based on the energy storage control commands. The energy storage power vehicle cluster includes multiple energy storage power vehicles.

[0026] It is clear that the energy storage control command refers to a human-initiated command to control the power supply vehicle. The energy storage power supply vehicle cluster refers to a collection of multiple energy storage power supply vehicles. Each energy storage power supply vehicle is a mobile power supply device integrating energy storage battery packs and bidirectional converters (PCS). This energy storage power supply vehicle can supply power to or absorb power from the grid side through a grid connection point (such as the initial grid connection point). For example, a mobile energy storage vehicle may contain four lithium iron phosphate battery packs and two 500kW bidirectional converters, and can be connected to a 10kV distribution network through a grid connection interface. The grid side refers to the external power system connected to the common grid connection point of the energy storage power supply vehicle cluster. For example, in a temporary capacity expansion scenario in an industrial park, the dispatch center issues an energy storage control command to mobilize three of the aforementioned energy storage vehicles to form an energy storage vehicle cluster. The cluster is connected to the industrial park's power distribution room through a 10kV grid connection point, thereby releasing electricity together during peak electricity consumption periods to alleviate transformer overload, while absorbing excess renewable energy during off-peak periods.

[0027] S2. Determine the grid energy storage bus based on the energy storage power vehicle cluster, identify the original grid connection point based on the grid energy storage bus and the grid side, and perform power direction detection based on the original grid connection point to obtain the current power direction. The original grid connection point includes the power source side and the grid side.

[0028] Understandably, the grid energy storage bus refers to the common bus where the output terminals of various energy storage vehicles in the energy storage vehicle cluster converge. Convergence refers to the process of integrating the output paths of multiple dispersed energy storage vehicles onto the same bus. This grid energy storage bus is used to uniformly collect the electrical energy from each energy storage vehicle and connect it to the outside world. This grid energy storage bus is located on the low-voltage side of the combiner cabinet or step-up transformer. The original grid connection point refers to the common connection point where the grid energy storage bus is connected to the grid side through a grid connection switch. The current power direction refers to the direction of power flow at the original grid connection point. The power supply side refers to the side of the original grid connection point closest to the grid energy storage bus, that is, the power supply side corresponds to the output terminal of each energy storage vehicle in the energy storage vehicle cluster.

[0029] In detail, the step of detecting the power direction based on the original grid connection point to obtain the current power direction includes: Three-phase data is collected from the original grid connection point to obtain the current three-phase voltage group and the current three-phase current group. The current three-phase voltage group includes multiple current three-phase voltages, and the current three-phase current group includes multiple current three-phase currents. The current instantaneous power is obtained by calculating the power based on the current three-phase voltage group and the current three-phase current group. The average instantaneous power is obtained by periodically averaging the current instantaneous power. If the average instantaneous power is greater than the preset zero value, the preset positive direction will be recorded as the current power direction; otherwise, the reverse direction will be recorded as the current power direction.

[0030] It should be explained that the "current three-phase voltage group" refers to the three-phase voltage data collected by the three-phase power acquisition module. This current three-phase voltage group contains three current three-phase voltages, where each current three-phase voltage refers to the instantaneous voltage value of phase A, phase B, or phase C collected at a certain moment. The "three-phase power acquisition module" refers to the device used to simultaneously acquire three-phase voltage signals and three-phase current signals. Phase A, phase B, or phase C refers to the three phases of the AC current in the three-phase power acquisition module. The "current three-phase current group" refers to the three-phase current data collected by the three-phase power acquisition module. This current three-phase current group contains three currents, where each current current refers to the instantaneous current value of phase A, phase B, or phase C collected at the same moment. The "current instantaneous power" refers to the instantaneous power value calculated based on the current three-phase voltage group and the current three-phase current group. The "average instantaneous power" refers to the power value obtained after periodic averaging. Periodic averaging of the current instantaneous power refers to summing all sampling points of the current instantaneous power within a complete power frequency cycle (e.g., 20ms), then dividing the sum by the number of sampling points within that complete power frequency cycle. The resulting value is the average instantaneous power. This periodic averaging process filters out high-frequency fluctuations in the current instantaneous power, thus accurately determining the direction and magnitude of the current instantaneous power flow over a period of time. When the average instantaneous power is greater than a preset zero value, it indicates that the current instantaneous power is flowing from the grid side to the power source side. At this time, the energy storage vehicle cluster is in a charging or load-consuming state, i.e., the positive direction is from the grid side to the power source side. When the average instantaneous power is not greater than zero, it indicates that the current instantaneous power is flowing from the power source side to the grid side. At this time, the energy storage vehicle cluster is in a discharging state, i.e., the reverse direction is from the power source side to the grid side.

[0031] Furthermore, the formula for calculating the active power at the grid connection point is as follows: ,in, Indicates the active power at the grid connection point. , and These represent the first, second, and third current three-phase voltages in the current three-phase voltage group, respectively. , and These represent the first, second, and third current phases in the current three-phase current group, respectively.

[0032] S3. If the current power direction is the preset reverse direction, then calculate the power value at the original grid connection point to obtain the reverse power value.

[0033] It is clear that if the current power direction is reversed, it means that the current instantaneous power is flowing from the power source side to the grid side, i.e., the energy storage vehicle cluster is feeding power to the grid. At this time, it is necessary to further calculate the specific value of the reverse power to determine whether the reverse power value exceeds the allowable threshold (i.e., the subsequent standard reverse power value) and thus determine the subsequent parameter adjustment steps. The reverse power value refers to the active power amplitude flowing from the power source side to the grid side at the original grid connection point under reverse conditions. The calculation method of this reverse power value is the same as the calculation method of the original instantaneous active power in the subsequent step of calculating the original instantaneous active power and the original instantaneous reactive power based on the original component voltage group and the original component current group.

[0034] S4. If the reverse power value is greater than the preset standard reverse power value, the reverse power dominance property is determined based on the original grid connection point. The reverse power dominance property is active power dominance, reactive power dominance, or mixed power dominance.

[0035] Understandably, the standard reverse power value refers to a pre-set reverse power threshold, used to determine whether the current reverse power value has reached a level requiring active adjustment. This standard reverse power value is set as follows: 5% to 10% of the rated power of the energy storage power vehicle cluster is used as the standard reverse power value, or the reverse power limit specified by the power grid company is directly adopted. When the reverse power value exceeds this standard reverse power value, it indicates that the current reverse power value has exceeded the allowable range. If not adjusted, it may lead to voltage or frequency exceeding limits at the original grid connection point, thereby causing equipment damage. The dominant nature of reverse power refers to the main power component type that causes the reverse power value. Active power dominance means that active power dominates the reverse power value; reactive power dominance means that reactive power dominates the reverse power value; and mixed power dominance means that the proportions of active and reactive power in the reverse power value are close.

[0036] In detail, the determination of the inverse power dominance property based on the original grid connection point includes: Three-phase data are periodically collected from the original grid connection point to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence; A power grayscale image is constructed based on the original instantaneous active power sequence and the original instantaneous reactive power sequence, wherein the size of the power grayscale image is [size missing]. ,in, This represents the quantity of original instantaneous active power in the original instantaneous active power sequence; Power properties are identified using a pre-trained power property identification model and a power grayscale image to obtain active power dominance probability values ​​and reactive power dominance probability values. The power property identification model is a convolutional neural network. The inverse power dominance property is determined based on the active power dominance probability value and the reactive power dominance probability value.

[0037] It should be explained that the original instantaneous active power sequence refers to a set of multiple original instantaneous active power sequences, and the original instantaneous reactive power sequence refers to a set of multiple original instantaneous reactive power sequences. The detailed acquisition methods of these original instantaneous active power sequences and original instantaneous reactive power sequences will be described in subsequent embodiments. The power grayscale image refers to a two-dimensional image encoded in grayscale pixels from the original instantaneous active power sequence and the original instantaneous reactive power sequence. Specifically, the method for constructing the power grayscale image based on the original instantaneous active power sequence and the original instantaneous reactive power sequence is as follows: first, the original instantaneous active power sequence and the original instantaneous reactive power sequence are normalized to an integer grayscale range of 0~255; then, the normalized original instantaneous active power sequence is used as the first row of pixels, and the normalized original instantaneous reactive power sequence is used as the second row of pixels, thus forming an image with a height of 2 and a width of... The grayscale image is the power grayscale image.

[0038] Furthermore, the power property identification model refers to a convolutional neural network model used to automatically identify the dominant inverse power property based on the input power grayscale image. The construction method of this power property identification model is as follows: First, power grayscale images corresponding to the original grid-connected point at different time periods are collected (these power grayscale images are recorded as historical grayscale images). Then, relevant technicians determine the power property of the original grid-connected point at that time period through work logs. This power property is active power or reactive power. The relevant technicians can determine which adjustment method (adjustment frequency or adjustment voltage) can eliminate the inverse power more quickly and stably during the actual adjustment process, so that the inverse power is within the allowable specified range. Define the power characteristics for the specified time period, repeat the above operation to obtain historical grayscale images and power characteristics for multiple different time periods. Use these historical grayscale images and corresponding power characteristics as training data to train a convolutional neural network. Training can be performed using methods such as backpropagation. The trained convolutional neural network is the power characteristic recognition model. Optionally, the structure of the convolutional neural network is as follows: an input layer, which receives the input historical grayscale image or power grayscale image; multiple convolutional layers and pooling layers; and an output layer, which contains two neurons, each neuron outputting the probability values ​​corresponding to active power dominance and reactive power dominance. The active power dominance probability value refers to the probability value corresponding to active power dominance output by the power characteristic recognition model. The reactive power probability value refers to the probability value corresponding to reactive power dominance output by the power characteristic recognition model. Compared to traditional methods that determine power properties (reactive power or active power) using fixed thresholds, this method uses a power property identification model that can learn features from power grayscale images that traditional thresholding methods cannot capture. These features include power fluctuation patterns under complex operating conditions such as harmonic distortion, transient oscillations, and three-phase imbalance. This enables adaptive identification of inverse power-dominant properties, avoids the shortcomings of fixed thresholds that are prone to misjudgment under complex operating conditions, and improves the accuracy of inverse power-dominant property determination.

[0039] In detail, the periodic acquisition of three-phase data from the original grid connection point to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence includes: Based on the preset original acquisition time, three-phase data are acquired from the original grid connection point to obtain the original three-phase voltage group and the original three-phase current group. The original three-phase voltage group and the original three-phase current group are subjected to coordinate transformation to obtain the original component voltage group and the original component current group. The original component voltage group includes: the first component voltage and the second component voltage, and the original component current group includes: the first component current and the second component current. Power calculations are performed based on the original component voltage group and the original component current group to obtain the original instantaneous active power and the original instantaneous reactive power. If the original acquisition time is less than the preset stop acquisition time, the updated acquisition time is calculated based on the original acquisition time and the preset unit acquisition interval. The updated acquisition time is used as the original acquisition time, and the step of acquiring three-phase data of the original grid connection point based on the preset original acquisition time is returned until the original acquisition time is not less than the stop acquisition time. If the original acquisition time is not less than the acquisition stop time, then the original instantaneous active power and the original instantaneous reactive power are summarized to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence.

[0040] It needs to be explained that the original acquisition time refers to the moment when three-phase data acquisition begins at the original grid-connected point within a certain acquisition cycle. For example, for a three-phase data acquisition cycle from 20:00 to 20:10, the original acquisition time is 20:00. The original three-phase voltage group refers to the combination of the three-phase voltages of the original grid-connected point acquired at the original acquisition time. The original three-phase current group refers to the combination of the three-phase currents of the original grid-connected point acquired at the original acquisition time. The acquisition methods for the original three-phase voltage group and the original three-phase current group are the same as those for the current three-phase voltage group and the current three-phase current group mentioned above, and will not be repeated here. The original component voltage group refers to the set of the first component voltage and the second component voltage, where the first component voltage and the second component voltage refer to the two voltage components obtained after coordinate transformation. The original component current group refers to the set of the first component current and the second component current, where the first component current and the second component current both refer to the two current components obtained after coordinate transformation (i.e., Clarke transformation). The calculation method for the first component current and the second component current is as follows:

[0041] in, and These represent the first component current and the second component current, respectively. , and These represent the three original three-phase currents in the original three-phase current group. The calculation formula here is the standard calculation formula of Clarke transform, and the specific calculation principle will not be elaborated here. The calculation method of the first component voltage and the second component voltage is the same as that of the first component current and the second component current.

[0042] Furthermore, the aforementioned coordinate transformation refers to performing Clarke transformation on the original three-phase voltage and current sets respectively. This coordinate transformation is used to convert the three-dimensional voltage and current data (i.e., the original three-phase voltage and current sets) into two-dimensional voltage and current data (i.e., the original component voltage and current sets), thereby enabling the subsequent calculation steps of the original instantaneous active power and the original instantaneous reactive power. The original instantaneous active power refers to the active power calculated based on the original component voltage and current sets, and the formula for calculating the original instantaneous active power is: The original instantaneous reactive power refers to the reactive power calculated based on the original component voltage group and the original component current group. The formula for calculating the original instantaneous reactive power is as follows: The "stop acquisition time" refers to the end time of a certain acquisition cycle. For example, 20:10 mentioned above refers to the stop acquisition time of the acquisition cycle from 20:00 to 20:10. The "unit acquisition interval" refers to the time interval between two three-phase data acquisitions. The "update acquisition time" refers to the time after one unit acquisition interval from the original acquisition time.

[0043] Specifically, determining the inverse power dominance property based on the active power dominance probability value and the reactive power dominance probability value includes: Calculate the dominant property deviation value based on the active power dominance probability value and the reactive power dominance probability value; If the deviation value of the dominant property is not greater than the preset deviation value of the standard property, then the mixed power dominance is recorded as the inverse power dominance property; If the deviation value of the dominant property is greater than the deviation value of the standard property, then the maximum dominant probability value among the active power dominance probability value and the reactive power dominance probability value is determined. If the maximum dominance probability value is the active power dominance probability value, then active power dominance is recorded as inverse power dominance; otherwise, reactive power dominance is recorded as inverse power dominance.

[0044] It should be explained that the dominant property deviation value refers to the numerical deviation between the quantified active power dominance probability value and the reactive power dominance probability value. The larger the dominant property deviation value, the greater the numerical deviation between the active power dominance probability value and the reactive power dominance probability value. That is, no power (active power or reactive power) dominates in the reverse power value. At this time, the probability of mixed power dominance is smaller. The above dominant property deviation value is calculated as follows: ,in, Indicates the deviation value of the dominant property. and These represent the active power dominance probability value and the reactive power dominance probability value, respectively. This represents the minimum value function. The standard property deviation value refers to a preset threshold used to determine whether the inverse power dominance property is a mixed power dominance property. This standard property deviation value can be set by relevant operators according to different adjustment accuracy requirements. The maximum dominance probability value refers to the larger of the active power dominance probability value and the reactive power dominance probability value.

[0045] S5. Based on the inverse power dominance property and the pre-built drive control module, the parameters of the original grid connection point are adjusted to obtain the adjusted grid connection point.

[0046] It is clear that the drive control module refers to a control unit used to adjust the amplitude and frequency of the output voltage on the power supply side. This drive control module may include a frequency converter control module, a PWM modulator, and power switching devices. For example, the frequency converter control module in an energy storage vehicle can adjust the amplitude and frequency of the output AC power based on the received power supply side frequency and voltage. The adjusted grid connection point refers to the original grid connection point after parameter adjustment.

[0047] In detail, the step of adjusting the parameters of the original grid connection point based on the inverse power dominance property and the pre-built drive control module to obtain the adjusted grid connection point includes: Get the current power supply frequency and voltage on the power supply side, and get the current grid frequency and voltage on the grid side. If the reverse power dominance property is active power dominance, then the current power supply side voltage is recorded as the regulated power supply side voltage; The current power supply side frequency is adjusted by using the current grid side frequency to obtain the adjusted power supply side frequency; If the reverse power dominance property is reactive power dominance, then the current power supply side frequency is recorded as the regulated power supply side frequency. The current power supply side voltage is adjusted by using the current grid side voltage to obtain the adjusted power supply side voltage; If the inverse power dominance property is mixed power dominance, then the current power supply frequency and current power supply voltage are jointly regulated based on the current grid side frequency and current grid side voltage to obtain the regulated power supply side frequency and regulated power supply side voltage. The original grid connection point is adjusted by regulating the power supply side frequency, the power supply side voltage, and the drive control module, thus obtaining the adjusted grid connection point.

[0048] It should be explained that the current power supply side frequency refers to the current output frequency of the power supply side at the original grid connection point, and the current power supply side voltage refers to the current output voltage amplitude of the power supply side at the original grid connection point. The adjusted power supply side frequency refers to the current power supply side frequency after adjustment. The adjusted power supply side voltage refers to the current power supply side voltage after adjustment. The current grid side frequency refers to the current frequency of the grid side, and the current grid side voltage refers to the current voltage amplitude of the grid side.

[0049] Furthermore, when the reverse power dominance is active power dominance, it indicates that the reverse power value is mainly caused by the frequency difference between the power source side and the grid side. Since the frequency difference is the main cause of active reverse power, it is necessary to adjust the current power source side frequency to obtain the regulated power source side frequency. At this time, because the voltage amplitude deviation has a relatively small impact on the reverse power value, to avoid unnecessary voltage adjustments causing new reactive power disturbances, the current power source side voltage can be directly recorded as the regulated power source side voltage. When the reverse power dominance is reactive power dominance, it indicates that the reverse power value is mainly caused by the voltage amplitude difference between the power source side and the grid side. Since the voltage amplitude difference is the main cause of reverse power, it is necessary to adjust the current power source side voltage to obtain the regulated power source side voltage. At this time, because the frequency difference has a relatively small impact on the reverse power value, to avoid unnecessary frequency adjustments causing new active power disturbances, the current power source side frequency can be directly recorded as the regulated power source side frequency. When the inverse power dominance property is mixed power dominance, it means that the frequency difference and voltage amplitude difference together cause the inverse power value. In this case, it is necessary to adjust the current power supply frequency and the current power supply voltage at the same time to obtain the adjusted power supply frequency and the adjusted power supply voltage under this condition.

[0050] In detail, the step of adjusting the current power supply side frequency using the current grid side frequency to obtain the adjusted power supply side frequency includes: Obtain the reference power value and adjustment step size; The adjusted power supply side frequency is calculated based on the reference power value, the current grid-side frequency, the adjustment step size, and the current power supply side frequency. The adjusted power supply side frequency is expressed as:

[0051] in, This indicates adjusting the power supply frequency. Indicates the current grid-side frequency. Indicates the current power supply frequency. This represents an exponential function with the natural constant as its base. This indicates taking the absolute value. Indicates the reverse power value. Indicates the reference power value. Indicates the adjustment step size. This represents the preset time constant.

[0052] It should be explained that the aforementioned reference power value refers to the reference power used to normalize the inverse power value. Optionally, the rated power of the energy storage power vehicle cluster can be used as this reference power value. The adjustment step size refers to the time interval between each frequency adjustment or voltage adjustment. Optionally, the adjustment step size is 0.01 seconds. The time constant refers to a constant used to normalize the adjustment step size, for example, 1 second.

[0053] Furthermore, in the above calculation formula for adjusting the power supply side frequency, The term represents the exponential amplification factor. A larger term indicates a larger product of the ratio of the inverse power value to the reference power value and the adjustment step size, leading to a higher frequency deviation (i.e., the aforementioned...). The greater the reduction in the value of the item, the closer the power supply side frequency is to the current grid side frequency through the calculation results here, thereby reducing the frequency deviation and suppressing the reverse power value.

[0054] In detail, the step of adjusting the current power supply side voltage using the current grid side voltage to obtain an adjusted power supply side voltage includes: Calculate the adjusted power supply voltage using the following formula:

[0055] in, This indicates adjusting the voltage on the power supply side. Indicates the current grid-side voltage. This indicates the current power supply voltage.

[0056] It needs to be explained that in the above calculation formula for adjusting the power supply side voltage, The term represents the attenuation factor of voltage deviation. The larger this term is, the shorter the reverse power adjustment step size and the smaller the voltage adjustment amplitude. The calculation results here make the voltage on the power supply side closer to the current voltage on the grid side, thereby effectively suppressing reactive reverse power.

[0057] In detail, the method of jointly regulating the current power supply side frequency and voltage based on the current grid side frequency and current grid side voltage to obtain the regulated power supply side frequency and regulated power supply side voltage includes: The reverse power value is divided based on the active power dominance probability value and the reactive power dominance probability value to obtain the active power reverse power value and the reactive power reverse power value. The frequency of the current power source side is adjusted by using the active reverse power value and the current grid side frequency to obtain the adjusted power source side frequency; The current power supply voltage is adjusted by using the reactive power inverse value and the current grid voltage to obtain the adjusted power supply voltage.

[0058] It is clear that the active reverse power value refers to the value obtained by multiplying the reverse power value by the active power dominance probability value. This active reverse power value represents an estimate of the active power component in the reverse power value. The reactive reverse power value refers to the value obtained by multiplying the reverse power value by the reactive power dominance probability value. This reactive reverse power value represents an estimate of the reactive power component in the reverse power value. The calculation formula for adjusting the current power supply side frequency using the active reverse power value and the current grid side frequency is the same as the calculation formula for adjusting the current power supply side frequency using the current grid side frequency to obtain the adjusted power supply side frequency. Similarly, the calculation formula for adjusting the current power supply side voltage using the reactive reverse power value and the current grid side voltage is the same as the calculation formula for adjusting the current power supply side voltage using the current grid side voltage to obtain the adjusted power supply side voltage. Therefore, it will not be repeated here.

[0059] S6. Perform reverse power elimination judgment on the grid connection point and obtain the elimination result, where the elimination result is either eliminated or not eliminated.

[0060] It is clear that the elimination result refers to the result obtained after the reverse power elimination judgment. Here, "eliminated" means that the reverse power value of the grid-connected point has been eliminated, that is, the reverse power value is not greater than the standard reverse power value. "Not eliminated" means that the reverse power value of the grid-connected point has not been eliminated. It is necessary to take the grid-connected point as the original grid-connected point and continue the above steps of adjusting the parameters of the original grid-connected point according to the dominant nature of reverse power and the pre-built drive control module until the elimination result is "eliminated".

[0061] S7. If the elimination result is that it has been eliminated, then the grid connection point will be adjusted as the target grid connection point to complete the control of the power vehicle energy storage unit based on the coordination of multiple energy storage units.

[0062] Understandably, the target grid connection point refers to the adjusted grid connection point that completes reverse power elimination. Compared with the traditional reverse power protection method that uses a fixed threshold for judgment, this scheme uses a convolutional neural network to identify the power grayscale image, accurately determine the dominant nature of reverse power, and adopts different nonlinear adjustment formulas according to different dominant reverse power properties to dynamically adjust the current power supply side frequency and voltage. This enables rapid and accurate suppression of reverse power values, avoids secondary disturbances caused by over-adjustment, and thus improves the stability of the energy storage power vehicle cluster during grid connection.

[0063] To address the problems described in the background section, this invention first detects the power direction based on the original grid connection point to obtain the current power direction. This step, through three-phase data acquisition and periodic averaging, filters out high-frequency fluctuations in instantaneous power and accurately determines the power flow direction. Compared to the traditional single-moment sampling method, this improves the reliability of power direction detection. If the reverse power value is greater than the standard reverse power value, the dominant nature of the reverse power is determined based on the original grid connection point. This step, by constructing a power grayscale image and using a convolutional neural network for identification, can accurately distinguish whether the reverse power is dominated by active power, reactive power, or a mixture of both. This avoids the shortcomings of the traditional fixed threshold method, which cannot distinguish power types, making subsequent adjustments more targeted. Finally, based on the dominant nature of the reverse power and the drive control module, the parameters of the original grid connection point are adjusted to obtain the adjusted grid connection point. This step uses nonlinear dynamic adjustment formulas for frequency or voltage according to different dominant reverse power properties, making the power supply side parameters smoothly approximate the grid side. This achieves rapid suppression of reverse power and prevents secondary disturbances caused by over-adjustment. Compared to the traditional single proportional-integral adjustment method, the adjustment process is more stable and converges faster. Therefore, the present invention can improve the accuracy and response speed of reverse power suppression during the energy storage process of power vehicles, and enhance the stability of the grid-connected operation of energy storage power vehicle clusters.

[0064] like Figure 2 The diagram shown is a functional block diagram of a power vehicle energy storage unit control system based on multi-energy storage unit collaboration, provided by an embodiment of the present invention.

[0065] The power vehicle energy storage unit control system 100 based on multi-energy storage unit collaboration described in this invention can be installed in an electronic device. Depending on the functions implemented, the power vehicle energy storage unit control system 100 may include a power direction detection module 101, a dominant property identification module 102, a grid-connected data adjustment module 103, and a grid-connected power elimination module 104. The module described in this invention can also be called a unit, which refers to a series of computer program segments that can be executed by the processor of an electronic device and can perform a fixed function, and which are stored in the memory of the electronic device. The power direction detection module 101 is used to receive energy storage control commands, identify the energy storage power vehicle cluster and the grid side based on the energy storage control commands, wherein the energy storage power vehicle cluster includes multiple energy storage power vehicles, determine the grid energy storage bus based on the energy storage power vehicle cluster, confirm the original grid connection point based on the grid energy storage bus and the grid side, and perform power direction detection based on the original grid connection point to obtain the current power direction, wherein the original grid connection point includes: the power supply side and the grid side; The dominant property identification module 102 is used to calculate the power value of the original grid connection point to obtain the inverse power value. If the inverse power value is greater than the preset standard inverse power value, the inverse power dominant property is determined based on the original grid connection point. The inverse power dominant property is active power dominant, reactive power dominant, or mixed power dominant. The grid-connected data adjustment module 103 is used to adjust the parameters of the original grid connection point according to the reverse power dominance and the pre-built drive control module to obtain the adjusted grid connection point; The grid-connected power elimination module 104 is used to perform reverse power elimination judgment on the regulated grid connection point and obtain the elimination result, wherein the elimination result is eliminated or not eliminated. If the elimination result is eliminated, the regulated grid connection point is taken as the target grid connection point.

[0066] In detail, the modules in the power vehicle energy storage unit control system 100 based on multi-energy storage unit collaboration described in this embodiment of the invention adopt the same approach as described above during use. Figure 1 The method used here is the same as the control method for the energy storage unit of the power vehicle based on the collaboration of multiple energy storage units, and can produce the same technical effect, so it will not be repeated here.

[0067] like Figure 3 The diagram shown is a structural schematic of an electronic device for implementing a power vehicle energy storage unit control method based on multi-energy storage unit collaboration, according to an embodiment of the present invention.

[0068] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and capable of running on the processor 10, such as a power vehicle energy storage unit control method program based on multi-energy storage unit collaboration.

[0069] The memory 11 includes at least one type of readable storage medium, such as flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the electronic device 1, such as the portable hard drive of the electronic device 1. In other embodiments, the memory 11 can be an external storage device of the electronic device 1, such as a plug-in portable hard drive, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the electronic device 1. Furthermore, the memory 11 includes both internal storage units and external storage devices of the electronic device 1. The memory 11 can be used not only to store application software and various types of data installed on the electronic device 1, such as the code of a power vehicle energy storage unit control method program based on multi-energy storage unit collaboration, but also to temporarily store data that has been output or will be output.

[0070] In some embodiments, the processor 10 may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control unit of the electronic device, connecting various components of the entire electronic device through various interfaces and lines. It executes programs or modules stored in the memory 11 (e.g., a power vehicle energy storage unit control method program based on multi-energy storage unit collaboration) and calls data stored in the memory 11 to perform various functions of the electronic device 1 and process data.

[0071] The bus 12 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 can be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize the connection and communication between the memory 11 and at least one processor 10, etc.

[0072] Figure 3 Only electronic devices with components are shown; it will be understood by those skilled in the art that... Figure 3The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0073] For example, although not shown, the electronic device 1 may also include a power supply (such as a battery) to power the various components. Preferably, the power supply can be logically connected to the at least one processor 10 through a power management device, thereby enabling functions such as charging management, discharging management, and power consumption management. The power supply may also include one or more DC or AC power supplies, recharging devices, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device 1 may also include various sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be described in detail here.

[0074] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a Wi-Fi interface, a Bluetooth interface, etc.), which is typically used to establish communication connections between the electronic device 1 and other electronic devices.

[0075] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), and optionally, a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the electronic device 1 and to display a visual user interface.

[0076] The power vehicle energy storage unit control method program based on multi-energy storage unit cooperation, stored in the memory 11 of the electronic device 1, is a combination of multiple instructions. When run in the processor 10, it can achieve the following: Receive energy storage control commands, and identify the energy storage power vehicle cluster and the grid side based on the energy storage control commands. The energy storage power vehicle cluster includes multiple energy storage power vehicles. The grid energy storage bus is determined based on the energy storage power vehicle cluster. The original grid connection point is identified based on the grid energy storage bus and the grid side. Power direction detection is performed based on the original grid connection point to obtain the current power direction. The original grid connection point includes the power source side and the grid side. If the current power direction is the preset reverse direction, then the power value is calculated for the original grid connection point to obtain the reverse power value; If the reverse power value is greater than the preset standard reverse power value, the reverse power dominance property is determined based on the original grid connection point, wherein the reverse power dominance property is active power dominance, reactive power dominance, or mixed power dominance. Based on the inverse power dominance property and the pre-built drive control module, the parameters of the original grid connection point are adjusted to obtain the adjusted grid connection point; The reverse power elimination judgment is performed on the grid connection point to obtain the elimination result, where the elimination result is either eliminated or not eliminated; If the elimination result is "eliminated", then the grid connection point will be adjusted as the target grid connection point to complete the control of the power vehicle energy storage unit based on the coordination of multiple energy storage units.

[0077] Specifically, the processor 10's implementation method for the above instructions can be found in [reference needed]. Figures 1 to 3 The descriptions of the relevant steps in the corresponding embodiments are not repeated here.

[0078] Furthermore, if the modules / units integrated in the electronic device 1 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0079] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor of an electronic device, can perform the following: Receive energy storage control commands, and identify the energy storage power vehicle cluster and the grid side based on the energy storage control commands. The energy storage power vehicle cluster includes multiple energy storage power vehicles. The grid energy storage bus is determined based on the energy storage power vehicle cluster. The original grid connection point is identified based on the grid energy storage bus and the grid side. Power direction detection is performed based on the original grid connection point to obtain the current power direction. The original grid connection point includes the power source side and the grid side. If the current power direction is the preset reverse direction, then the power value is calculated for the original grid connection point to obtain the reverse power value; If the reverse power value is greater than the preset standard reverse power value, the reverse power dominance property is determined based on the original grid connection point, wherein the reverse power dominance property is active power dominance, reactive power dominance, or mixed power dominance. Based on the inverse power dominance property and the pre-built drive control module, the parameters of the original grid connection point are adjusted to obtain the adjusted grid connection point; The reverse power elimination judgment is performed on the grid connection point to obtain the elimination result, where the elimination result is either eliminated or not eliminated; If the elimination result is "eliminated", then the grid connection point will be adjusted as the target grid connection point to complete the control of the power vehicle energy storage unit based on the coordination of multiple energy storage units.

[0080] In the embodiments provided by this invention, it should be understood that the disclosed devices, systems, and methods can be implemented in other ways. For example, the system embodiments described above are merely illustrative, and actual implementations may have other classification methods.

[0081] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0082] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional modules.

[0083] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A control method for a power vehicle energy storage unit based on multi-energy storage unit collaboration, characterized in that, The method includes: Receive energy storage control commands, and identify the energy storage power vehicle cluster and the grid side based on the energy storage control commands. The energy storage power vehicle cluster includes multiple energy storage power vehicles. The grid energy storage bus is determined based on the energy storage power vehicle cluster. The original grid connection point is identified based on the grid energy storage bus and the grid side. Power direction detection is performed based on the original grid connection point to obtain the current power direction. The original grid connection point includes the power source side and the grid side. If the current power direction is the preset reverse direction, then the power value is calculated for the original grid connection point to obtain the reverse power value; If the reverse power value is greater than the preset standard reverse power value, the reverse power dominance property is determined based on the original grid connection point, wherein the reverse power dominance property is active power dominance, reactive power dominance, or mixed power dominance. The determination of the inverse power dominance property based on the original grid connection point includes: Three-phase data are periodically collected from the original grid connection point to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence; A power grayscale image is constructed based on the original instantaneous active power sequence and the original instantaneous reactive power sequence, wherein the size of the power grayscale image is [size missing]. ,in, This represents the quantity of original instantaneous active power in the original instantaneous active power sequence; Power properties are identified using a pre-trained power property identification model and a power grayscale image to obtain active power dominance probability values ​​and reactive power dominance probability values. The power property identification model is a convolutional neural network. The inverse power dominance property is determined based on the active power dominance probability value and the reactive power dominance probability value; the power property identification model is constructed in the following ways: Power grayscale images corresponding to the original grid-connected point at different time periods are collected and recorded as historical grayscale images. Relevant technicians determine the power characteristics of the original grid-connected point at that time period through work logs. The power characteristics are active power or reactive power. Among them, the relevant technicians can determine the power characteristics of that time period based on which adjustment method can eliminate reverse power more quickly and stably during the actual adjustment process, so that the reverse power is brought within the allowable specified range. The adjustment method is to adjust the frequency or adjust the voltage. The above operation is repeated to obtain historical grayscale images and power characteristics at multiple different time periods. These historical grayscale images and corresponding power characteristics are used as training data to train a convolutional neural network. The training method is backpropagation. The completed convolutional neural network is the power characteristic recognition model. Based on the inverse power dominance property and the pre-built drive control module, the parameters of the original grid connection point are adjusted to obtain the adjusted grid connection point; The reverse power elimination judgment is performed on the grid connection point to obtain the elimination result, where the elimination result is either eliminated or not eliminated; If the elimination result is "eliminated", then the grid connection point will be adjusted as the target grid connection point to complete the control of the power vehicle energy storage unit based on the coordination of multiple energy storage units.

2. The power vehicle energy storage unit control method based on multi-energy storage unit collaboration as described in claim 1, characterized in that, The step of detecting the current power direction based on the original grid connection point includes: Three-phase data is collected from the original grid connection point to obtain the current three-phase voltage group and the current three-phase current group. The current three-phase voltage group includes multiple current three-phase voltages, and the current three-phase current group includes multiple current three-phase currents. The current instantaneous power is obtained by calculating the power based on the current three-phase voltage group and the current three-phase current group. The average instantaneous power is obtained by periodically averaging the current instantaneous power. If the average instantaneous power is greater than the preset zero value, the preset positive direction will be recorded as the current power direction; otherwise, the reverse direction will be recorded as the current power direction.

3. The power vehicle energy storage unit control method based on multi-energy storage unit collaboration as described in claim 2, characterized in that, The process of periodically acquiring three-phase data from the original grid connection point to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence includes: Based on the preset original acquisition time, three-phase data are acquired from the original grid connection point to obtain the original three-phase voltage group and the original three-phase current group. The original three-phase voltage group and the original three-phase current group are subjected to coordinate transformation to obtain the original component voltage group and the original component current group. The original component voltage group includes: the first component voltage and the second component voltage, and the original component current group includes: the first component current and the second component current. Power calculations are performed based on the original component voltage group and the original component current group to obtain the original instantaneous active power and the original instantaneous reactive power. If the original acquisition time is less than the preset stop acquisition time, the updated acquisition time is calculated based on the original acquisition time and the preset unit acquisition interval. The updated acquisition time is used as the original acquisition time, and the step of acquiring three-phase data of the original grid connection point based on the preset original acquisition time is returned until the original acquisition time is not less than the stop acquisition time. If the original acquisition time is not less than the acquisition stop time, then the original instantaneous active power and the original instantaneous reactive power are summarized to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence.

4. The power vehicle energy storage unit control method based on multi-energy storage unit collaboration as described in claim 3, characterized in that, The determination of the inverse power dominance property based on the active power dominance probability value and the reactive power dominance probability value includes: Calculate the dominant property deviation value based on the active power dominance probability value and the reactive power dominance probability value; If the deviation value of the dominant property is not greater than the preset deviation value of the standard property, then the mixed power dominance is recorded as the inverse power dominance property; If the deviation value of the dominant property is greater than the deviation value of the standard property, then the maximum dominant probability value among the active power dominance probability value and the reactive power dominance probability value is determined. If the maximum dominance probability value is the active power dominance probability value, then active power dominance is recorded as inverse power dominance; otherwise, reactive power dominance is recorded as inverse power dominance.

5. The power vehicle energy storage unit control method based on multi-energy storage unit collaboration as described in claim 4, characterized in that, The step of adjusting the parameters of the original grid connection point based on the inverse power dominance property and the pre-constructed drive control module to obtain the adjusted grid connection point includes: Get the current power supply frequency and voltage on the power supply side, and get the current grid frequency and voltage on the grid side. If the reverse power dominance property is active power dominance, then the current power supply side voltage is recorded as the regulated power supply side voltage; The current power supply side frequency is adjusted by using the current grid side frequency to obtain the adjusted power supply side frequency; If the reverse power dominance property is reactive power dominance, then the current power supply side frequency is recorded as the regulated power supply side frequency. The current power supply side voltage is adjusted by using the current grid side voltage to obtain the adjusted power supply side voltage; If the inverse power dominance property is mixed power dominance, then the current power supply frequency and current power supply voltage are jointly regulated based on the current grid side frequency and current grid side voltage to obtain the regulated power supply side frequency and regulated power supply side voltage. The original grid connection point is adjusted by regulating the power supply side frequency, the power supply side voltage, and the drive control module, thus obtaining the adjusted grid connection point.

6. The power vehicle energy storage unit control method based on multi-energy storage unit collaboration as described in claim 5, characterized in that, The step of adjusting the current power supply side frequency using the current grid side frequency to obtain the adjusted power supply side frequency includes: Obtain the reference power value and adjustment step size; The adjusted power supply side frequency is calculated based on the reference power value, the current grid-side frequency, the adjustment step size, and the current power supply side frequency. The adjusted power supply side frequency is expressed as: in, This indicates adjusting the power supply frequency. Indicates the current grid-side frequency. Indicates the current power supply frequency. This represents an exponential function with the natural constant as its base. This indicates taking the absolute value. Indicates the reverse power value. Indicates the reference power value. Indicates the adjustment step size. This represents the preset time constant.

7. The power vehicle energy storage unit control method based on multi-energy storage unit collaboration as described in claim 6, characterized in that, The step of adjusting the current power supply side voltage using the current grid side voltage to obtain an adjusted power supply side voltage includes: Calculate the adjusted power supply voltage using the following formula: in, This indicates adjusting the voltage on the power supply side. Indicates the current grid-side voltage. This indicates the current power supply voltage.

8. The power vehicle energy storage unit control method based on multi-energy storage unit collaboration as described in claim 7, characterized in that, The method of jointly regulating the current power supply side frequency and voltage based on the current grid side frequency and voltage to obtain the regulated power supply side frequency and voltage includes: The reverse power value is divided based on the active power dominance probability value and the reactive power dominance probability value to obtain the active power reverse power value and the reactive power reverse power value. The frequency of the current power source side is adjusted by using the active reverse power value and the current grid side frequency to obtain the adjusted power source side frequency; The current power supply voltage is adjusted by using the reactive power inverse value and the current grid voltage to obtain the adjusted power supply voltage.

9. A power vehicle energy storage unit control system based on multi-energy storage unit collaboration, characterized in that, The system includes: The power direction detection module is used to receive energy storage control commands, identify the energy storage power vehicle cluster and the grid side based on the energy storage control commands, wherein the energy storage power vehicle cluster includes multiple energy storage power vehicles, determine the grid energy storage bus based on the energy storage power vehicle cluster, confirm the original grid connection point based on the grid energy storage bus and the grid side, and perform power direction detection based on the original grid connection point to obtain the current power direction, wherein the original grid connection point includes: the power source side and the grid side; The dominant property identification module is used to calculate the power value of the original grid connection point to obtain the inverse power value. If the inverse power value is greater than the preset standard inverse power value, the dominant property of the inverse power is determined based on the original grid connection point. The dominant property of the inverse power is active power dominant, reactive power dominant, or mixed power dominant. The determination of the dominant property of the inverse power based on the original grid connection point includes: Three-phase data are periodically collected from the original grid connection point to obtain the original instantaneous active power sequence and the original instantaneous reactive power sequence; A power grayscale image is constructed based on the original instantaneous active power sequence and the original instantaneous reactive power sequence, wherein the size of the power grayscale image is [size missing]. ,in, This represents the quantity of original instantaneous active power in the original instantaneous active power sequence; Power properties are identified using a pre-trained power property identification model and a power grayscale image to obtain active power dominance probability values ​​and reactive power dominance probability values. The power property identification model is a convolutional neural network. The inverse power dominance property is determined based on the active power dominance probability value and the reactive power dominance probability value; the power property identification model is constructed in the following ways: Power grayscale images corresponding to the original grid-connected point at different time periods are collected and recorded as historical grayscale images. Relevant technicians determine the power characteristics of the original grid-connected point at that time period through work logs. The power characteristics are active power or reactive power. Among them, the relevant technicians can determine the power characteristics of that time period based on which adjustment method can eliminate reverse power more quickly and stably during the actual adjustment process, so that the reverse power is brought within the allowable specified range. The adjustment method is to adjust the frequency or adjust the voltage. The above operation is repeated to obtain historical grayscale images and power characteristics at multiple different time periods. These historical grayscale images and corresponding power characteristics are used as training data to train a convolutional neural network. The training method is backpropagation. The completed convolutional neural network is the power characteristic recognition model. The grid-connected data adjustment module is used to adjust the parameters of the original grid connection point according to the reverse power dominance and the pre-built drive control module to obtain the adjusted grid connection point; The grid-connected power elimination module is used to determine the reverse power elimination at the grid-connected point and obtain the elimination result, which is either eliminated or not eliminated. If the elimination result is eliminated, the grid-connected point is taken as the target grid-connected point.

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