Power control method, device and equipment of energy storage converter and medium

Abstract

The application discloses a power control method and device of an energy storage converter, equipment and a medium, and relates to the technical field of energy storage power stations. The method is used to solve the problem that when the existing zero-power instruction is frequently switched, the actual output power of the energy storage converter is prone to slow convergence, the residual is not zero, and the response to repeated zero instructions is weakened, resulting in invalid execution of the target instruction. After the communication controller receives the target power instruction issued by the scheduling system, the actual output power is periodically collected when the target power value is a preset target value, and whether the instruction is invalid is identified in combination with a preset judgment threshold. If the target power instruction is invalid, a random disturbance power instruction with an amplitude located in a preset interval and a direction consistent with the actual output power is generated and sent to the main control unit, otherwise the target power instruction is continuously sent. The application can improve the effectiveness of zero-power instruction execution, accelerate the stabilization of output power to zero, and improve the power control accuracy, scheduling response efficiency and system operation stability.

Description

Technical Field

[0001] This application relates to the field of energy storage power station technology, and in particular to power control methods, devices, equipment and media for energy storage converters. Background Technology

[0002] In energy storage power stations, energy storage converters typically issue power commands through energy management systems or grid dispatching systems to achieve bidirectional energy conversion and power regulation with the AC grid.

[0003] However, under frequent switching of zero-power commands, the actual power of the energy storage converter often exhibits slow convergence, steady-state residuals, or weakened response to repeated commands, making it difficult to return to the target value in a timely manner. This leads to a decrease in power control accuracy and affects the efficiency of remote dispatch response and the stability of system operation.

[0004] Therefore, improving the effectiveness of energy storage converters in executing zero-power commands to achieve rapid and stable convergence of actual power to zero has become an urgent technical problem to be solved. Summary of the Invention

[0005] This application provides a power control method, apparatus, equipment, and medium for energy storage converters to solve the aforementioned technical problems.

[0006] In a first aspect, this application provides a power control method for an energy storage converter, applied to a communication controller, wherein the communication controller is communicatively connected to the main control unit of the energy storage converter; the method includes:

[0007] Obtain the target power command issued by the scheduling system;

[0008] When the target power value corresponding to the target power command is a preset target value, the actual output power of the energy storage converter is collected according to a preset period.

[0009] Based on the actual output power and the preset judgment threshold, it is determined whether the execution of the target power command is in a failed state;

[0010] If it is determined that the execution of the target power command is in a failed state, a random disturbance power command is generated and sent to the main control unit; wherein, the amplitude of the random disturbance power command is randomly generated within a preset range, and the direction of the random disturbance power command is consistent with the direction of the actual output power;

[0011] If it is determined that the execution of the target power command is not in a failed state, the target power command is sent to the main control unit to drive the output power of the energy storage converter to converge to the target power value.

[0012] In one possible design, determining whether the execution of the target power command is in a failed state based on the actual output power and a preset threshold includes:

[0013] The absolute value of the actual output power is compared with a first preset threshold; wherein the upper limit of the preset range of the amplitude of the random disturbance power command is less than the first preset threshold.

[0014] If the absolute value of the actual output power is greater than the first preset threshold, it is determined that the execution of the target power command is in a failed state.

[0015] If the absolute value of the actual output power is less than or equal to the first preset threshold, it is determined that the execution of the target power command is not in a failed state.

[0016] In one possible design, after sending the target power command to the main control unit, the method further includes:

[0017] The absolute value of the actual output power is compared with a second preset threshold; wherein the second preset threshold is less than the first preset threshold, and the upper limit of the preset range of the amplitude of the random disturbance power command is greater than the second preset threshold;

[0018] If the absolute value of the actual output power is greater than the second preset threshold and less than or equal to the first preset threshold, the target power command is sent to the main control unit.

[0019] If the absolute value of the actual output power is less than or equal to the second preset threshold, it is determined that the output power of the energy storage converter has converged to the target power value.

[0020] In one possible design, after generating the random disturbance power command and sending it to the main control unit, the method further includes:

[0021] The actual output power of the main control unit after executing the random disturbance power command is obtained according to the preset period;

[0022] The absolute value of the updated actual output power is compared with the first preset threshold.

[0023] If the absolute value of the actual output power after the update is greater than the first preset threshold, a random disturbance power command is regenerated and sent to the main control unit.

[0024] In one possible design, generating random perturbation power commands includes:

[0025] Determine the power direction sign corresponding to the current actual output power;

[0026] The power direction symbol is determined as the direction symbol of the random disturbance power command, so that the disturbance direction is consistent with the direction of the actual output power;

[0027] The disturbance amplitude is randomly generated within the preset range according to a preset random algorithm, and the disturbance amplitude is less than the absolute value of the current actual output power;

[0028] A corresponding random disturbance power command is generated based on the disturbance amplitude and the direction sign.

[0029] One possible design also includes:

[0030] The continuously issued random disturbance power commands are cumulatively counted;

[0031] If the cumulative count reaches the preset number of disturbances and the execution of the target power command is still in a failed state, a fault alarm message is generated and a shutdown command is sent to the main control unit.

[0032] In one possible design, the preset target value is zero; the target power command is a zero power command.

[0033] Secondly, this application provides a power control device for an energy storage converter, deployed on a communication controller, wherein the communication controller is communicatively connected to the main control unit of the energy storage converter; the device includes:

[0034] The instruction acquisition module is used to acquire the target power instruction issued by the scheduling system;

[0035] The power acquisition module is used to acquire the actual output power of the energy storage converter according to a preset period when the target power value corresponding to the target power command is a preset target value.

[0036] The failure determination module is used to determine whether the execution of the target power command is in a failed state based on the actual output power and a preset determination threshold.

[0037] The disturbance command generation module is used to generate a random disturbance power command and send it to the main control unit when it is determined that the execution of the target power command is in a failed state; wherein, the amplitude of the random disturbance power command is randomly generated within a preset range, and the direction of the random disturbance power command is consistent with the direction of the actual output power;

[0038] The instruction sending module is used to send the target power instruction to the main control unit when it is determined that the execution of the target power instruction is not in a failed state, so as to drive the output power of the energy storage converter to converge to the target power value.

[0039] Thirdly, this application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0040] The memory stores computer-executed instructions;

[0041] The processor executes computer execution instructions stored in the memory to implement the method as described in any of the first aspects.

[0042] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any of the first aspects.

[0043] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the method described in any of the first aspects.

[0044] The power control method, apparatus, equipment, and medium for energy storage converters provided in this application include: acquiring a target power command issued by a dispatch system; when the target power value corresponding to the target power command is a preset target value, collecting the actual output power of the energy storage converter according to a preset period; determining whether the execution of the target power command is in a failed state based on the actual output power and a preset judgment threshold; if the execution of the target power command is determined to be in a failed state, generating a random disturbance power command and sending it to the main control unit, wherein the amplitude of the random disturbance power command is randomly generated within a preset range, and the direction of the random disturbance power command is consistent with the direction of the actual output power; if the execution of the target power command is determined not to be in a failed state, sending the target power command to the main control unit to drive the output power of the energy storage converter to converge to the target power value. In this application, the communication controller establishes a continuous control process around the target power, including command acquisition, periodic sampling, failure determination, disturbance switching, and target maintenance. When the target power command fails to bring the actual output power of the energy storage converter to near the target power value, a random disturbance power command with the same direction as the current actual output power and whose amplitude varies randomly within a preset range is generated to cause the main control unit to leave the original failure control state. When no failure of the target power command is detected, the target power command is continuously sent to maintain the normal convergence path, so that the energy storage converter can return to near the target power value more quickly and remain stable. Attached Figure Description

[0045] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0046] Figure 1An application scenario diagram corresponding to the power control method of the energy storage converter provided in an embodiment of this application;

[0047] Figure 2 A schematic flowchart of a power control method for an energy storage converter provided in an embodiment of this application;

[0048] Figure 3 A schematic flowchart of a power control method for an energy storage converter provided in another embodiment of this application;

[0049] Figure 4 A schematic flowchart of a power control method for an energy storage converter provided in another embodiment of this application;

[0050] Figure 5 A schematic diagram of the power control device for an energy storage converter provided in an embodiment of this application;

[0051] Figure 6 This is a structural example diagram of an electronic device provided in an embodiment of this application.

[0052] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0053] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application.

[0054] To clearly understand the technical solution of this application, the solutions of the prior art will be described in detail first.

[0055] Energy storage converter power control technology is mainly used to execute dispatch power commands during the grid-connected operation of energy storage power stations, realizing bidirectional energy conversion and active power regulation between the battery system and the AC grid. In practical applications, the dispatch system, communication controller, and energy storage converter main control unit constitute the basic control link, which is particularly suitable for scenarios that require frequent power switching, such as grid-side frequency regulation and peak shaving, new energy distribution and storage, and industrial and commercial energy storage.

[0056] Existing energy storage converters typically receive target power commands from the dispatch system, which are then transmitted to the main control unit via a communication link. The main control unit then controls the converter to output the corresponding power. When the target value switches to zero, the system generally relies on repeatedly sending zero-power commands or continuously waiting for the control loop to converge on its own, in order to gradually bring the actual output power back to near zero. However, under conditions of frequent switching of zero-power commands, the actual output power often exhibits slow convergence, long-term residual non-zero values, or weakened response to repeated zero commands, indicating that the execution of the target power command may have failed. In this case, simply continuing to send the same target command is insufficient to effectively change the current control state of the main control unit, causing the power to remain in the non-zero range for an extended period.

[0057] The aforementioned defects not only reduce power control accuracy but also affect the response efficiency of remote dispatch, making it difficult for the energy storage converter to smoothly return to zero in a timely manner during scenarios such as frequency switching, power withdrawal, or protection limit triggering, thereby adversely affecting the system's operational stability and the effectiveness of automated control.

[0058] Therefore, how to improve the effectiveness of energy storage converters in executing zero-power commands, so that the actual output power can converge to the target value quickly and stably, has become an urgent technical problem to be solved.

[0059] Figure 1 An application scenario diagram corresponding to the power control method of the energy storage converter provided in one embodiment of this application is shown, such as... Figure 1 As shown, the application scenario provided in this embodiment includes: a power grid dispatching system 10, a communication controller 11, and an energy storage converter main control unit 12. The communication controller 11 can interact with the power grid dispatching system 10 and the energy storage converter main control unit 12 through a communication network.

[0060] Specifically, during the grid-connected operation of the energy storage power station, the grid dispatch system 10 first generates a target power command and sends it to the communication controller 11. The communication controller 11 identifies the target power value in the target power command. When the target power value is a preset target value, it collects the actual output power reported by the energy storage converter main control unit 12 according to a preset cycle. Based on the actual output power and a preset judgment threshold, the communication controller 11 determines whether the zero-power command execution is in a failed state. If it is determined to be in a failed state, it generates a random disturbance power command with an amplitude randomly generated within a preset range and a direction in the same direction as the actual output power, and sends the random disturbance power command to the energy storage converter main control unit 12. If it is not in a failed state, it directly forwards the target power command to the energy storage converter main control unit 12. After receiving the power command, the energy storage converter main control unit 12 drives the energy storage converter power main circuit to complete the power closed-loop regulation, causing the output power of the energy storage converter to converge towards the target power value.

[0061] This solution uses a communication controller to monitor upper-level commands and actively intervene in disturbances without modifying the underlying control logic of the energy storage converter. It effectively solves problems such as slow power convergence, residual steady-state power, and weakened command response under frequent switching of zero-power commands, improves the power control accuracy of the energy storage converter, and ensures the reliability of grid-connected scheduling and the stability of the system operation of the energy storage power station.

[0062] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0063] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0064] Figure 2 A schematic flowchart of a power control method for an energy storage converter provided in an embodiment of this application is shown below. Figure 2 As shown, the execution entity in this embodiment is the power control device of the energy storage converter. The power control device is deployed on the communication controller, which is communicatively connected to the main control unit of the energy storage converter. This device can be implemented through a computer program, a medium storing the relevant computer program, or a physical device integrating or installing the relevant computer program, such as a chip or electronic device. The power control method for the energy storage converter provided in this embodiment includes the following steps:

[0065] S201. Obtain the target power command issued by the scheduling system.

[0066] Specifically, the method of this application is applied to the communication controller of an energy storage power station. The energy storage power station includes a dispatching system (including an energy management system, a grid dispatching platform, etc.) on the power station side, a communication controller, and at least one energy storage converter. The communication controller is connected to the dispatching system and the main control unit of each energy storage converter via an industrial bus (such as Ethernet). The dispatching system is responsible for issuing power dispatching commands for the entire station or a single device; the communication controller undertakes command forwarding, status monitoring, and optimized control functions; the main control unit of the energy storage converter is a local control module with a built-in power closed-loop control algorithm, which drives the main circuit to achieve bidirectional AC / DC energy conversion based on the received power commands.

[0067] This method solves the control failure problem under zero-power commands by upgrading the software logic of the communication controller without modifying the main control unit algorithm of the energy storage converter or adding new hardware.

[0068] The scheduling system, acting as the upper-level command source, sends target power commands to the communication controller. These commands characterize the power state the scheduling system expects the energy storage converter to output, and must include at least the target power value. Upon receiving data from the scheduling system, the communication controller parses the data, extracts the target power value, and uses it as input for subsequent status determination and power control. The energy storage converter, as the controlled object and power output entity, ultimately has its output power adjusted by the main control unit based on the control commands issued by the communication controller.

[0069] Optionally, in specific implementations, the communication controller can receive the target power command sent by the scheduling system via industrial Ethernet, serial communication bus, or station control layer forwarding link. To ensure that subsequent control processes can respond promptly to changes in target power, the communication controller can enter the subsequent power acquisition and execution status determination process based on the target power value after receiving the target power command.

[0070] Optionally, the target power value corresponding to the target power command can be an active power setpoint, in kilowatts or megawatts. A positive value indicates that power is sent to the AC grid, a negative value indicates that power is absorbed from the AC grid, and a zero value indicates that the energy storage converter has entered the zero power control target.

[0071] S202. When the target power value corresponding to the target power command is a preset target value, the actual output power of the energy storage converter is collected according to a preset cycle.

[0072] The preset target value is used to determine whether the target power command is a specific threshold. When the communication controller detects that the target power value corresponding to the currently effective target power command is the preset target value, it initiates a periodic acquisition process of the actual output power of the energy storage converter.

[0073] Among them, the actual output power is used as a feedback quantity to characterize the current actual power status of the energy storage converter. It can be directly taken from the real-time power measurement value uploaded by the autonomous control unit, or it can be taken from the active power feedback value generated by the power detection module on the grid-connected side of the energy storage converter.

[0074] The preset period is a pre-set time interval for power acquisition, used to specify the frequency at which the communication controller periodically acquires the actual output power. This is achieved by the communication controller reading the real-time feedback from the energy storage converter at fixed intervals, thus forming a continuous power feedback sequence. For example, the preset period can range from 10ms to 100ms.

[0075] Optionally, in implementation, after detecting that the target power value equals a preset target value, the communication controller initiates an internal timed task and reads the actual output power according to a preset cycle. The preset cycle can be set according to the dynamic response requirements of the energy storage converter's power control loop. During the acquisition process, the communication controller can obtain relevant information about the actual output power for subsequent control use.

[0076] Optionally, if the target power value is not the preset target value, the communication controller will not enter the detection process corresponding to this step, and the main control unit will perform conventional power tracking according to the target power command.

[0077] This step establishes a feedback sampling sequence with a preset period under preset target operating conditions, enabling the communication controller to continuously monitor the current power status of the energy storage converter and provide continuous and comparable input data for failure identification.

[0078] S203. Based on the actual output power and the preset judgment threshold, determine whether the execution of the target power command is in a failed state.

[0079] The preset judgment threshold is a pre-set judgment boundary used to compare the actual output power with the preset judgment threshold to determine whether the execution of the target power command is in a failed state. Since the current target power value is the preset target value, the communication controller can compare the deviation between the collected actual output power and the target power value with the preset judgment threshold to determine whether the energy storage converter has converged towards the target power.

[0080] Optionally, if the deviation of the actual output power from the target power value is greater than a preset judgment threshold, it indicates that the target power command has not been effectively executed, and the execution of the target power command can be considered to be in a failed state; if the deviation of the actual output power from the target power value is not greater than the preset judgment threshold, the execution of the target power command is considered to be in a failed state.

[0081] Optionally, in implementation, the communication controller calculates the deviation between the sampled actual output power and the target power value, and compares it with a preset judgment threshold to form a judgment result for the current execution state. The preset judgment threshold can be set according to device parameters and control requirements. The above comparison directly reflects the magnitude of the deviation between the actual output and the target power value.

[0082] S204. If the execution of the target power command is determined to be in a failed state, a random disturbance power command is generated and sent to the main control unit; wherein, the amplitude of the random disturbance power command is randomly generated within a preset range, and the direction of the random disturbance power command is consistent with the direction of the actual output power.

[0083] The random disturbance power command, serving as an auxiliary power command to break the failure state, is generated by the communication controller and sent to the main control unit when the target power command fails. Specifically, the amplitude of the random disturbance power command is not a fixed value but is randomly generated within a preset range, ensuring that the main control unit receives a control input different from the current target power command, thereby changing the current control state. The direction of the random disturbance power command is consistent with the direction of the actual output power. The communication controller can determine the disturbance direction based on the current actual output power and generate a random amplitude based on a pre-configured amplitude range, then combine the two to form the random disturbance power command.

[0084] Specifically, if the actual output power is positive (discharge direction), the random disturbance power command is also positive; if the actual output power is negative (charging direction), the random disturbance power command is also negative. Same-direction disturbances can avoid reverse power overshoot, reduce power surges, and allow the system to more smoothly exit the control dead zone.

[0085] Optionally, in specific implementation, when the communication controller determines that the target power command has failed to execute during the current cycle, it generates a random disturbance amplitude within a preset interval, and combines this with the direction of the actual output power to form a random disturbance power command, which is then sent to the main control unit. Upon receiving the random disturbance power command, the main control unit controls the energy storage converter to perform corresponding power adjustments accordingly.

[0086] It should be noted that this step is crucial for resolving the target power command execution failure issue. Since continuing to send the same target value in a failed state is unlikely to change the controller's current state, a random disturbance power command, by injecting an auxiliary command different from the original target power, causes the main control unit to receive a new control quantity, thereby triggering a readjustment of the energy storage converter's output state. Furthermore, the amplitude is randomly generated within a preset range, avoiding control state stagnation caused by fixed disturbance patterns; and the direction is consistent with the actual output power direction, which helps establish a clear control response.

[0087] This step breaks the control stagnation state when the target power command fails to be executed by random disturbance, allowing the energy storage converter to re-enter the adjustable state range.

[0088] S205. If it is determined that the execution of the target power command is not in a failed state, send the target power command to the main control unit to drive the output power of the energy storage converter to converge to the target power value.

[0089] Optionally, when the communication controller determines that the execution of the target power command is not in a failed state based on the comparison between the actual output power and the preset judgment threshold, the communication controller does not generate a random disturbance power command, but instead sends the target power command to the main control unit. The main control unit then controls the energy storage converter to perform power regulation according to the target power command. The main control unit, as the controlled object that receives and executes the power command, controls the energy storage converter to achieve power convergence or disturbance switching according to the received command. When the received command is a target power command, the main control unit maintains the normal target tracking process.

[0090] Optionally, in specific implementation, after sampling and judgment in each preset cycle, if the current judgment result is not invalid, the communication controller sends the currently valid target power command to the main control unit. To ensure that the main control unit continuously executes target power convergence control, the communication controller can maintain the transmission of the target power command, allowing the main control unit to use the current target power value as the control benchmark. When subsequent sampling shows that the output power of the energy storage converter continues to converge towards the target power value, the communication controller continues to maintain the target power command until a new dispatch power command is received.

[0091] Optionally, the communication controller periodically samples and synchronously sends target power commands under preset target operating conditions. When the sampling results show that the actual output power gradually decreases and no failure state is formed, the communication controller continues to send target power commands, and the main control unit drives the energy storage converter to smoothly converge to the vicinity of the target.

[0092] This step enables the communication controller to maintain the standard target tracking path when no execution failure occurs, avoiding the introduction of unnecessary disturbances during the normal convergence phase.

[0093] The power control method for an energy storage converter provided in this application involves: acquiring a target power command issued by a scheduling system; when the target power value corresponding to the target power command is a preset target value, collecting the actual output power of the energy storage converter according to a preset period; determining whether the execution of the target power command is in a failed state based on the actual output power and a preset judgment threshold; if the execution of the target power command is determined to be in a failed state, generating a random disturbance power command and sending it to the main control unit, wherein the amplitude of the random disturbance power command is randomly generated within a preset range, and the direction of the random disturbance power command is consistent with the direction of the actual output power; if the execution of the target power command is determined not to be in a failed state, sending the target power command to the main control unit to drive the output power of the energy storage converter to converge to the target power value. In this application, the communication controller establishes a continuous control process around the target power, including command acquisition, periodic sampling, failure determination, disturbance switching, and target maintenance. When the target power command fails to bring the actual output power of the energy storage converter to near the target power value, a random disturbance power command with the same direction as the current actual output power and whose amplitude varies randomly within a preset range is generated to prompt the main control unit to leave the original failure control state. When no failure of the target power command is detected, the target power command is continuously sent to maintain the normal convergence path, thereby enabling the energy storage converter to return to near the target power value more quickly and remain stable. It should be understood that the above example is only illustrative and not limiting.

[0094] Figure 3 A schematic flowchart of a power control method for an energy storage converter provided in another embodiment of this application; as shown Figure 3 As shown, as an optional implementation, based on any of the above embodiments, determining whether the execution of the target power command is in a failed state based on the actual output power and a preset judgment threshold includes the following steps:

[0095] S301. Compare the absolute value of the actual output power with the first preset threshold; wherein the upper limit of the preset range of the amplitude of the random disturbance power command is less than the first preset threshold.

[0096] The first preset threshold is the boundary for determining the convergence failure of the target power command. Its physical meaning is: when the actual power deviation continues to exceed the first preset threshold, it can be determined that the internal control loop of the energy storage converter main control unit has entered a failure state and cannot rely on its own closed-loop algorithm to complete the convergence to the target power.

[0097] Optionally, in specific engineering implementations, the first preset threshold can be configured as 5% to 15% of the rated power of the energy storage converter. For example, for an energy storage converter with a rated power of 100kW, the first preset threshold can be set to 10kW. This threshold needs to be combined with the topology of the energy storage converter, the characteristics of the main control algorithm, and the grid impedance settings to ensure accurate identification of the true failure state while avoiding misjudging normal dynamic adjustment processes as failures.

[0098] It should be noted that in this embodiment, the upper limit of the preset range of the random disturbance power command amplitude (i.e., the maximum disturbance amplitude) is less than the first preset threshold. On the one hand, a small disturbance itself will not cause the actual power to jump above the failure judgment threshold, thus avoiding triggering a new round of failure judgment due to disturbance injection and forming a logical dead loop; on the other hand, it ensures that the disturbance is always executed within the small signal range within the failure boundary, which will not lead to a further expansion of the power deviation and meets the grid-friendly control requirements.

[0099] S302. If the absolute value of the actual output power is greater than the first preset threshold, it is determined that the execution of the target power command is in a failed state.

[0100] S303. If the absolute value of the actual output power is less than or equal to the first preset threshold, determine that the execution of the target power command is not in a failed state.

[0101] Specifically, after the target power command is issued, if the actual power of the energy storage converter stabilizes above the first preset threshold, it indicates that the power outer loop, current inner loop and feedforward compensation loop inside the main control unit have formed a steady-state failure point. The combination of factors such as multi-loop coupling causing the integral state to be unable to be reset, grid voltage feedforward component clamping modulation output, and quantization dead zone causing insufficient closed-loop gain, causes the control loop to lose its ability to respond to zero power commands. Simply repeatedly issuing the target power command can no longer drive the power to continue to decrease, and the steady state must be broken by external disturbance.

[0102] Optionally, to avoid misjudgment caused by fluctuations in a single sampling, the system can only determine a failure state when the absolute value of the actual output power is greater than the first preset threshold for 3 to 5 consecutive sampling cycles, thereby improving the anti-interference capability of the judgment.

[0103] Specifically, when the absolute value of the actual output power is less than or equal to the first preset threshold, it is determined that the execution of the target power command is not in a failed state. At this time, the actual power has entered the linear adjustment range of the controller, and the original closed-loop algorithm of the main control unit has sufficient adjustment capability to drive the power to gradually converge to zero without additional disturbance intervention; the communication controller only needs to transmit the target power command normally, and the final convergence can be completed by the local control logic of the energy storage converter.

[0104] The power control method for energy storage converters provided in this application allows the communication controller to promptly identify the failure state of the target power command when the actual output power continuously deviates from zero and exceeds a threshold, and to resume normal issuance of the target power command when the actual output power has returned to the threshold range. This ensures consistency between failure identification and disturbance triggering, reduces the occurrence of invalid commands, and allows the actual output power to more stably return to the vicinity of the target power value.

[0105] Figure 4 A schematic flowchart of a power control method for an energy storage converter provided in another embodiment of this application; as shown Figure 4 As shown, as an optional implementation, based on any of the above embodiments, after sending the target power command to the main control unit, the following steps are further included:

[0106] S401. Compare the absolute value of the actual output power with the second preset threshold; wherein the second preset threshold is less than the first preset threshold, and the upper limit of the preset range of the amplitude of the random disturbance power command is greater than the second preset threshold.

[0107] The second preset threshold is the final qualification threshold for target power convergence, indicating that the power deviation has met the grid-connected control accuracy requirements. Optionally, it can be configured as 0.5% to 2% of the rated power of the energy storage converter in implementation.

[0108] It should be noted that the upper limit of the random disturbance power command is between the first preset threshold and the second preset threshold. This ensures that the disturbance has sufficient adjustment power to push the power out of the failure zone, while also preventing the disturbance itself from exceeding the failure judgment boundary and causing logical misjudgment. This ensures that the disturbance output will not fall directly into the convergence qualified range, thus guaranteeing the step-by-step smooth progress of the control process.

[0109] S402. When the absolute value of the actual output power is greater than the second preset threshold and less than or equal to the first preset threshold, a target power command is sent to the main control unit.

[0110] S403. If the absolute value of the actual output power is less than or equal to the second preset threshold, it is determined that the output power of the energy storage converter has converged to the target power value.

[0111] Specifically, when the absolute value of the actual output power is greater than the second preset threshold and less than or equal to the first preset threshold, the system is determined to be in the transition adjustment range. The communication controller continuously sends the original zero-power target command to the main control unit without triggering the random disturbance mechanism. At this time, the power deviation has escaped the influence range of the nonlinear dead zone and multi-loop coupling failure. The power outer loop and current inner loop regulators of the energy storage converter main control can work normally in the linear segment. Relying on its own closed-loop regulation capability, it can drive the power to continuously converge towards the target value without external disturbance intervention, thus avoiding unnecessary power fluctuations introduced by additional disturbances.

[0112] Specifically, when the absolute value of the actual output power is less than or equal to the second preset threshold, it is formally determined that the output power of the energy storage converter has converged to the power target value.

[0113] Optionally, after convergence confirmation, the communication controller maintains normal command pass-through state and can synchronously feed back the command execution completion status to the upper-level scheduling system; furthermore, when the target power value is zero power, the low-power blocking mechanism built into the main control unit of the energy storage converter will automatically take over and shut down the PWM pulse output at the hardware level to achieve the final zero-power hardware-level shutdown.

[0114] The power control method for energy storage converters provided in this application allows the communication controller to continuously maintain the target power command output when the target power command execution has not failed, and further confirm the final zero-value state after the power enters a smaller amplitude range. This enables the main control unit to more smoothly transition the output adjustment of the energy storage converter to the target value. Since the second preset threshold is lower than the first preset threshold, the zero-value confirmation is completed within a more refined low-power range. Combined with the setting that the upper limit of the preset range of the random disturbance power command amplitude is greater than the second preset threshold, the early disturbance adjustment and the later fine convergence can be seamlessly connected. Therefore, the energy storage converter can achieve more accurate convergence confirmation near zero power, reducing the situation of continuously lingering in the non-zero low-power range.

[0115] As an optional implementation, based on any of the above embodiments, after generating the random disturbance power command and sending it to the main control unit, the following steps are also included:

[0116] First, the actual output power of the main control unit after executing the random disturbance power command is obtained according to the preset cycle.

[0117] Optionally, after the communication controller sends a random disturbance power command to the main control unit of the energy storage converter, it does not directly jump to the target power command sending logic, but maintains the original preset acquisition cycle and continues to read the updated actual output power uploaded by the main control unit after executing this disturbance command.

[0118] Among them, the updated actual output power is the steady-state grid-connected active power sample value after the main control unit executes the disturbance command and completes the power adjustment. It includes all state change information brought about by the disturbance excitation to the multi-loop control loop, and can truly reflect whether the disturbance has successfully broken the failure steady-state operating point.

[0119] Next, the absolute value of the updated actual output power is compared with the first preset threshold. If the absolute value of the updated actual output power is greater than the first preset threshold, a new random disturbance power command is generated and sent to the main control unit.

[0120] Specifically, the communication controller takes the absolute value of the updated actual output power collected this time and compares it with the pre-configured first preset threshold. If the absolute value of the updated actual output power is still greater than the first preset threshold, it indicates that the excitation intensity of the previous round of random amplitude disturbance in the same direction was insufficient, the failure conditions such as multi-loop coupling, feedforward cancellation, and zero-point limit loop inside the DSP were not broken, the control loop is still stuck at the failure steady-state equilibrium point, and the single disturbance did not achieve the shift of the operating point.

[0121] Optionally, a new random disturbance power command, which is randomly generated within a preset amplitude range and is in the same direction as the current actual power, is sent to the main control unit again to complete a new round of disturbance excitation. After the command is sent, the actual power after the disturbance is collected again according to a preset cycle, and the cycle is continuously checked until the power is removed from the failure judgment boundary.

[0122] Optionally, a maximum disturbance count counter can be preset. If the disturbance fails to escape the failure zone after N consecutive iterations, a fault alarm and a fallback shutdown will be triggered to prevent infinite loop disturbances.

[0123] Optionally, if the absolute value of the updated actual output power is less than or equal to the first preset threshold, it is determined that the random disturbance (or multiple iterations) has successfully broken the internal failure operating point of the main controller, and the operating point of the energy storage converter has entered the linearly self-converging transition range from the failure stagnation region, and the DSP power / current dual-loop PI regulator has restored its normal linear regulation capability. At this time, the iterative disturbance loop is exited, and the issuance of random disturbance power commands is stopped.

[0124] As an optional implementation, based on any of the above embodiments, generating a random disturbance power command includes the following steps:

[0125] First, determine the power direction sign corresponding to the current actual output power.

[0126] Optionally, the communication controller reads the actual output power of the energy storage converter in the current cycle and extracts the positive or negative sign of the power value as the power direction sign. If the actual output power is greater than zero, the direction sign can be "+", and the current energy storage converter is operating in the residual power discharge condition in steady state; if the actual output power is less than zero, the direction sign can be "-", and the current energy storage converter is operating in the residual power charging condition in steady state.

[0127] Optionally, when the actual output power is equal to 0, the disturbance generation process is not entered, and symbol extraction is not required.

[0128] Secondly, the power direction symbol is determined to be the direction symbol of the random disturbance power command so that the disturbance direction is consistent with the direction of the actual output power.

[0129] Specifically, in this embodiment, the extracted power direction symbol is directly used as the symbol bit of the random disturbance power command, so that the charging and discharging direction of the disturbance power is completely consistent with the current actual output power.

[0130] Next, a perturbation amplitude is randomly generated within a preset range according to a preset random algorithm, and the perturbation amplitude is less than the absolute value of the current actual output power.

[0131] Optionally, the embedded chip of the communication controller has a built-in uniform random distribution algorithm and a pseudo-random number generation algorithm, which randomly output pure positive number amplitudes without fixed rules within a preset range. Each generated amplitude is non-repeating and non-periodic, thus avoiding the cancellation effect of the filtering and feedforward prediction modules inside the main control unit of the energy storage converter on fixed amplitude signals.

[0132] Optionally, if the randomly generated amplitude is greater than or equal to the current actual power absolute value, the random algorithm is retried until the output satisfies that the randomly generated amplitude is less than the current actual power absolute value; this ensures that the disturbance amplitude is always less than the existing residual power and that there will be no power overshoot or operating condition reversal.

[0133] Finally, a corresponding random disturbance power command is generated based on the disturbance amplitude and direction sign.

[0134] Specifically, the power corresponding to the random disturbance power command is the product of the disturbance amplitude and direction. The synthesized disturbance command is in the standard active power command format and can be directly sent to the main control unit via existing communication buses such as Ethernet without modifying the communication protocol.

[0135] As an optional implementation, based on any of the above embodiments, the following steps are also included:

[0136] First, the random disturbance power commands issued continuously are cumulatively counted.

[0137] Optionally, the communication controller initializes the disturbance accumulation counter and clears the count value to 0 the moment it first detects that the target power command execution has failed and enters the disturbance process. If the subsequent disturbance iteration loop exits (the actual power falls back to within the first preset threshold and enters the transition convergence interval), the counter is reset to 0, and the count is restarted from zero when the disturbance process is triggered again.

[0138] Optionally, after each random disturbance power command is generated and issued, the cumulative counter is immediately incremented by 1; only the number of disturbances that have not left the failure zone is counted. If the power successfully exits the failure judgment interval and the disturbance issuance stops midway, the counting is interrupted and the counter is reset to avoid invalid accumulation of discontinuous disturbances.

[0139] Optionally, the count value is stored in real time in the local register / power-down non-volatile storage area of ​​the communication controller and synchronously uploaded to the scheduling system, so that the background can trace the number of disturbance interventions for zero-power failure events.

[0140] Secondly, when the cumulative count reaches the preset number of disturbances and the execution of the target power command is still in a failed state, a fault alarm message is generated and a shutdown command is sent to the main control unit.

[0141] The preset number of disturbances is the maximum number of disturbances allowed in advance (e.g., 5 to 15 times, which can be flexibly configured according to the power plant dispatch requirements and the type of energy storage converter).

[0142] Optionally, if the cumulative count reaches the upper limit but the power has fallen back to within the first preset threshold, it indicates that the disturbance intervention has taken effect and there is no need to trigger an alarm or shutdown.

[0143] Optionally, when a disturbance exceeding the limit is determined, the communication controller immediately generates standardized fault alarm information. The alarm content includes, but is not limited to: the current time, the energy storage converter equipment number, the zero power command failure fault type, the cumulative number of disturbances, the current actual residual power value, and the start and end time of the disturbance intervention.

[0144] Optionally, alarm information can be simultaneously uploaded to the energy management system and the remote power grid dispatching master station via the station's communication network to achieve remote visualization of the fault and remind maintenance personnel that there is a permanent power control abnormality in the equipment.

[0145] Optionally, a shutdown command is issued to the main control unit of the energy storage converter as a fallback protection measure. Simultaneously, a grid-connected shutdown command is issued to the main control unit of the energy storage converter. The grid-connected shutdown command includes multi-level action logic such as waveform blocking, power reduction, and disconnection of the grid-connected contactor. The main control unit executes a standardized shutdown procedure: first, gradually reduce the output power and block the PWM modulation pulse, and then disconnect the grid-connected contactor, so that the energy storage converter can smoothly exit the grid-connected operation state and eliminate the grid-connected safety risks caused by long-term non-zero power retention.

[0146] As an optional implementation, based on any of the above embodiments, the preset target value is zero; the target power command is a zero power command.

[0147] In this scheme, after the preset target value is set to zero, the execution determination of the target power command, the generation of random disturbance power commands, and retransmission all revolve around the zero-power state. This enables the communication controller to handle the response failure problem of the energy storage converter in the zero-power scenario. The target value corresponding to the zero-power command is clear and fixed, which makes it easy for the communication controller to compare the actual output power with the preset threshold and determine whether to introduce random disturbance power commands. This allows the control link to continuously perform convergence control around the zero output state.

[0148] Optionally, the communication controller can parse the target power value issued by the scheduling system as zero, generate a corresponding zero-power command, and send it to the main control unit. When the main control unit fails to return the output power to zero in time due to control lag or loop residue, the communication controller continues to determine and correct the power execution status according to the zero-power command. The parameter value corresponding to the zero-power command can be directly set to zero kilowatts, zero megawatts, or other zero-value representations. In practical applications, this command format can also be adapted to the communication protocols of different manufacturers, and this application does not limit it in this regard.

[0149] Specifically, by explicitly setting the preset target value to zero and defining the target power command as the zero power command, the entire power control process can be uniformly limited to the zero-output scenario. Based on this, the communication controller performs failure judgment, command retransmission and disturbance correction, thereby enabling the energy storage converter to enter a stable zero-output state more quickly when the target is removed, frequency regulation is switched or shutdown transition occurs, and improving the execution consistency and response determinism of zero power control.

[0150] Figure 5 This is a schematic diagram of the power control device for an energy storage converter provided in an embodiment of this application, as shown below. Figure 5 As shown, the power control device of the energy storage converter provided in this embodiment is deployed in the communication controller, which is located in the electronic device. The power control device 50 of the energy storage converter provided in this embodiment includes: an instruction acquisition module 51, a power acquisition module 52, a failure determination module 53, a disturbance instruction generation module 54, and an instruction sending module 55.

[0151] Specifically, the instruction acquisition module 51 is used to acquire the target power instruction issued by the scheduling system; the power acquisition module 52 is used to acquire the actual output power of the energy storage converter according to a preset period when the target power value corresponding to the target power instruction is a preset target value; the failure determination module 53 is used to determine whether the execution of the target power instruction is in a failed state based on the actual output power and a preset determination threshold; the disturbance instruction generation module 54 is used to generate a random disturbance power instruction and send it to the main control unit when it is determined that the execution of the target power instruction is in a failed state; wherein, the amplitude of the random disturbance power instruction is randomly generated within a preset range, and the direction of the random disturbance power instruction is consistent with the direction of the actual output power; the instruction sending module 55 is used to send the target power instruction to the main control unit when it is determined that the execution of the target power instruction is not in a failed state, so as to drive the output power of the energy storage converter to converge to the target power value.

[0152] Optionally, the failure determination module 53, when determining whether the execution of the target power command is in a failed state based on the actual output power and a preset determination threshold, is specifically used to: compare the absolute value of the actual output power with a first preset threshold; wherein the upper limit of the preset range of the amplitude of the random disturbance power command is less than the first preset threshold; if the absolute value of the actual output power is greater than the first preset threshold, determine that the execution of the target power command is in a failed state; if the absolute value of the actual output power is less than or equal to the first preset threshold, determine that the execution of the target power command is not in a failed state.

[0153] Optionally, after sending the target power command to the main control unit, the failure determination module 53 is further configured to: compare the absolute value of the actual output power with a second preset threshold; wherein the second preset threshold is less than the first preset threshold, and the upper limit of the preset range of the amplitude of the random disturbance power command is greater than the second preset threshold; if the absolute value of the actual output power is greater than the second preset threshold and less than or equal to the first preset threshold, send the target power command to the main control unit; if the absolute value of the actual output power is less than or equal to the second preset threshold, determine that the output power of the energy storage converter has converged to the target power value.

[0154] Optionally, after generating a random disturbance power command and sending it to the main control unit, the disturbance command generation module 54 is further configured to: obtain the actual output power of the main control unit after executing the random disturbance power command according to a preset period; compare the absolute value of the updated actual output power with a first preset threshold; and if the absolute value of the updated actual output power is greater than the first preset threshold, regenerate the random disturbance power command and send it to the main control unit.

[0155] Optionally, the disturbance command generation module 54, when generating a random disturbance power command, is specifically used to: determine the power direction symbol corresponding to the current actual output power; determine the power direction symbol as the direction symbol of the random disturbance power command so that the disturbance direction is consistent with the direction of the actual output power; randomly generate a disturbance amplitude within a preset interval according to a preset random algorithm, and the disturbance amplitude is less than the absolute value of the current actual output power; and generate a corresponding random disturbance power command based on the disturbance amplitude and direction symbol.

[0156] Optionally, the disturbance command generation module 54 is further configured to: accumulate and count the continuously issued random disturbance power commands; and generate fault alarm information and send a shutdown command to the main control unit when the continuous accumulated count reaches the preset number of disturbances and the execution of the target power command is still in a failed state.

[0157] Optionally, the preset target value is zero; the target power command is a zero power command.

[0158] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application, as shown below. Figure 6 As shown, the electronic device 50 provided in this embodiment includes a processor 61 and a memory 62 that is communicatively connected to the processor 61.

[0159] The memory 62 stores computer execution instructions; the processor 61 executes the computer execution instructions stored in the memory 62 to implement the method provided in any of the above embodiments.

[0160] The program may include program code, which includes computer-executable instructions. Memory 62 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device.

[0161] In this embodiment, the memory 62 and the processor 61 are connected via a bus. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 6 The bus is represented by a single straight line, but this does not mean that there is only one bus or one type of bus.

[0162] This application also provides a computer-readable storage medium, including computer-executable instructions stored in the computer-readable storage medium, which, when executed by a processor, are used to implement the method provided in any of the above embodiments.

[0163] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the method provided in any of the above embodiments.

[0164] 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 implement the solution of this embodiment according to actual needs.

[0165] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The unit composed of the above modules can be implemented in hardware or in the form of hardware plus software functional units.

[0166] The integrated modules described above, implemented as software functional modules, can be stored in a computer-readable storage medium. These software functional modules, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of this application.

[0167] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly manifested as execution by a hardware processor, or execution by a combination of hardware and software modules within the processor.

[0168] The memory may include high-speed RAM, and may also include non-volatile storage (NVM), such as at least one disk storage device, and may also be a USB flash drive, external hard drive, read-only memory, disk or optical disc, etc.

[0169] The aforementioned storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0170] An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Alternatively, the storage medium can be an integral part of the processor. The processor and storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and storage medium can exist as discrete components in an electronic control unit or main control device.

[0171] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0172] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power control method for an energy storage converter, characterized in that, The method is applied to a communication controller, which is communicatively connected to the main control unit of the energy storage converter; the method includes: Obtain the target power command issued by the scheduling system; When the target power value corresponding to the target power command is a preset target value, the actual output power of the energy storage converter is collected according to a preset period. Based on the actual output power and the preset judgment threshold, it is determined whether the execution of the target power command is in a failed state; If it is determined that the execution of the target power command is in a failed state, a random disturbance power command is generated and sent to the main control unit; wherein, the amplitude of the random disturbance power command is randomly generated within a preset range, and the direction of the random disturbance power command is consistent with the direction of the actual output power; If it is determined that the execution of the target power command is not in a failed state, the target power command is sent to the main control unit to drive the output power of the energy storage converter to converge to the target power value.

2. The method according to claim 1, characterized in that, The step of determining whether the execution of the target power command is in a failed state based on the actual output power and a preset judgment threshold includes: The absolute value of the actual output power is compared with a first preset threshold; wherein the upper limit of the preset range of the amplitude of the random disturbance power command is less than the first preset threshold. If the absolute value of the actual output power is greater than the first preset threshold, it is determined that the execution of the target power command is in a failed state. If the absolute value of the actual output power is less than or equal to the first preset threshold, it is determined that the execution of the target power command is not in a failed state.

3. The method according to claim 2, characterized in that, After sending the target power command to the main control unit, the method further includes: The absolute value of the actual output power is compared with a second preset threshold; wherein the second preset threshold is less than the first preset threshold, and the upper limit of the preset range of the amplitude of the random disturbance power command is greater than the second preset threshold; If the absolute value of the actual output power is greater than the second preset threshold and less than or equal to the first preset threshold, the target power command is sent to the main control unit. If the absolute value of the actual output power is less than or equal to the second preset threshold, it is determined that the output power of the energy storage converter has converged to the target power value.

4. The method according to claim 2, characterized in that, After generating the random disturbance power command and sending it to the main control unit, the method further includes: The actual output power of the main control unit after executing the random disturbance power command is obtained according to the preset period; The absolute value of the updated actual output power is compared with the first preset threshold. If the absolute value of the actual output power after the update is greater than the first preset threshold, a random disturbance power command is regenerated and sent to the main control unit.

5. The method according to claim 1, characterized in that, The generation of random disturbance power commands includes: Determine the power direction sign corresponding to the current actual output power; The power direction symbol is determined as the direction symbol of the random disturbance power command, so that the disturbance direction is consistent with the direction of the actual output power; The disturbance amplitude is randomly generated within the preset range according to a preset random algorithm, and the disturbance amplitude is less than the absolute value of the current actual output power; A corresponding random disturbance power command is generated based on the disturbance amplitude and the direction sign.

6. The method according to claim 1, characterized in that, Also includes: The continuously issued random disturbance power commands are cumulatively counted; If the cumulative count reaches the preset number of disturbances and the execution of the target power command is still in a failed state, a fault alarm message is generated and a shutdown command is sent to the main control unit.

7. The method according to any one of claims 1-6, characterized in that, The preset target value is zero; the target power command is a zero power command.

8. A power control device for an energy storage converter, characterized in that, Deployed in a communication controller, the communication controller being communicatively connected to the main control unit of the energy storage converter; the device includes: The instruction acquisition module is used to acquire the target power instruction issued by the scheduling system; The power acquisition module is used to acquire the actual output power of the energy storage converter according to a preset period when the target power value corresponding to the target power command is a preset target value. The failure determination module is used to determine whether the execution of the target power command is in a failed state based on the actual output power and a preset determination threshold. The disturbance command generation module is used to generate a random disturbance power command and send it to the main control unit when it is determined that the execution of the target power command is in a failed state; wherein, the amplitude of the random disturbance power command is randomly generated within a preset range, and the direction of the random disturbance power command is consistent with the direction of the actual output power; The instruction sending module is used to send the target power instruction to the main control unit when it is determined that the execution of the target power instruction is not in a failed state, so as to drive the output power of the energy storage converter to converge to the target power value.

9. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-7.

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