Coordinated control methods, devices, multi-source heterogeneous energy systems and storage media

Abstract

This application provides a coordinated control method, apparatus, multi-source heterogeneous energy system, and storage medium, applied to a multi-source heterogeneous energy system. The multi-source heterogeneous energy system includes a grid side, user-side loads, at least one energy storage terminal, and at least one energy production terminal, with a grid connection point between the grid side and the user side. The method includes: during the operation of the multi-source heterogeneous energy system, acquiring the state of charge (SOC) of the energy storage terminal and the energy production information of the energy production terminal; determining a rigid protection threshold corresponding to the grid connection point based on the SOC and energy production information; and executing coordinated control using rigid and flexible coordination strategies based on the rigid protection threshold to control the operating parameters of the energy storage terminal and the energy production terminal. This method aims to improve the matching degree between the protection actions and regulation capabilities of the multi-source heterogeneous energy system, enhancing the stability and reliability of the system's grid-connected operation.

Description

Technical Field

[0001] This application relates to the field of electronic power technology, and in particular to a coordinated control method, device, multi-source heterogeneous energy system and storage medium. Background Technology

[0002] Multi-source heterogeneous energy systems typically employ a reverse current prevention scheme that combines grid connection point reverse current detection, photovoltaic power regulation, and energy storage charge and discharge control to meet grid connection operation requirements.

[0003] However, common grid-connected control methods generally employ rigid threshold mechanisms with fixed parameters. By pre-setting fixed thresholds for power, voltage, etc., they ensure grid-connected safety through a "one-size-fits-all" approach such as forced tripping or hard power cut-off. This lacks flexibility and dynamic adaptability. Fixed thresholds cannot respond to real-time fluctuations in energy storage state of charge, energy output, and load, easily leading to excessive power rationing or energy waste. The lack of multi-device coordination logic and isolated control modes make it difficult to leverage the complementary advantages of energy storage and energy production. The rigid and lagging response mechanism is unable to cope with dynamic disturbances across multiple time scales, and may even trigger system instability risks.

[0004] Existing, inflexible grid-connected control methods can no longer meet the system's requirements for efficient and precise operation, and there is an urgent need for a coordinated control method that integrates rigid protection and flexible regulation. Summary of the Invention

[0005] This application provides a coordinated control method, device, multi-source heterogeneous energy system, and storage medium to improve the matching degree of protection actions and regulation capabilities of multi-source heterogeneous energy systems, and enhance the stability and reliability of the system's grid-connected operation.

[0006] In a first aspect, embodiments of this application provide a coordinated control method applied to a multi-source heterogeneous energy system, wherein the multi-source heterogeneous energy system includes a grid side, a user-side load, at least one energy storage terminal and at least one energy production terminal, and a grid connection point is provided between the grid side and the user side;

[0007] The method includes:

[0008] During the operation of the multi-source heterogeneous energy system, the state of charge of the energy storage end and the energy production information of the energy production end are acquired.

[0009] When the state of charge indicates that the amount of electricity in the energy storage terminal is less than a first proportional threshold, and the energy production information indicates that the output margin of the energy production terminal is greater than or equal to a second proportional threshold, the initial protection threshold is reduced by a first preset ratio to obtain a rigid protection threshold.

[0010] When the state of charge indicates that the amount of electricity at the energy storage terminal is greater than or equal to the first proportional threshold and less than the third proportional threshold, and the energy production information indicates that the output margin at the energy production terminal is less than the second proportional threshold and greater than or equal to the fourth proportional threshold, the initial protection threshold shall be used as the rigid protection threshold.

[0011] When the state of charge indicates that the amount of electricity in the energy storage terminal is greater than or equal to the third proportional threshold, or when the energy production information indicates that the output margin of the energy production terminal is less than the fourth proportional threshold, the initial protection threshold is increased according to the second preset ratio to obtain the rigid protection threshold; the first proportional threshold is less than the third proportional threshold, and the second proportional threshold is greater than the fourth proportional threshold.

[0012] If the active power at the grid connection point is less than the rigid protection threshold, a rigid coordination strategy is adopted to control the switching device at the grid connection point to disconnect.

[0013] When the active power at the grid connection point is greater than or equal to the rigid protection threshold, a flexible coordination strategy is adopted to control the operating parameters of the energy storage end and the energy production end.

[0014] In one possible implementation, the use of the flexible coordination strategy to control the operating parameters of the energy storage end and the energy production end includes:

[0015] If it is within a preset time range, adjust the operating parameters of the energy storage terminal and the energy production terminal based on the active power of the grid connection point;

[0016] Otherwise, the energy production end will be shut down from the grid.

[0017] In one possible implementation, after adjusting the energy production information at the energy production end based on the active power of the grid connection point, the method further includes:

[0018] Based on the adjusted production energy information and the state of charge of the energy storage terminal, the rigid protection threshold is adjusted.

[0019] In one possible implementation, adjusting the operating parameters of the energy storage terminal and the energy production terminal based on the active power of the grid connection point includes:

[0020] When the active power at the grid connection point is less than a preset first power threshold, the energy storage terminal is controlled to charge, and when the state of charge indicator of the energy storage segment indicates that the energy storage terminal's charge reaches a preset fifth proportional threshold or the charging power of the energy storage terminal reaches a preset second power threshold, the output power of the energy production terminal is controlled to be zero.

[0021] When the active power at the grid connection point is greater than or equal to the first power threshold and less than the preset third power threshold, the energy storage terminal is controlled to charge. When the state of charge of the energy storage segment indicates that the energy storage terminal's charge reaches the fifth proportional threshold or the charging power of the energy storage terminal reaches the second power threshold, the output power of the energy production terminal is reduced based on the group control power of the energy production terminal indicated by the energy production information.

[0022] When the active power at the grid connection point is greater than or equal to the third power threshold, the output power of the energy production end is increased based on the group control power and the preset adjustment step size.

[0023] In one possible implementation, the use of the rigid coordination strategy to control the switching device at the grid connection point to disconnect includes:

[0024] The number of times the switching device has been disconnected within a preset time period is obtained;

[0025] If the number of attempts does not reach the preset threshold, the switching device at the grid connection point will be disconnected after a preset delay period; otherwise, an alarm will be issued.

[0026] Secondly, this application provides a coordination control device for use in a multi-source heterogeneous energy system. The multi-source heterogeneous energy system includes a grid side, a user-side load, at least one energy storage terminal, and at least one energy production terminal. A grid connection point is provided between the grid side and the user side.

[0027] The device includes:

[0028] The acquisition module is used to acquire the state of charge of the energy storage end and the energy production information of the energy production end during the operation of the multi-source heterogeneous energy system.

[0029] The determination module is used to reduce a pre-set initial protection threshold by a first preset ratio to obtain a rigid protection threshold when the state of charge indicates that the amount of electricity at the energy storage terminal is less than a first proportional threshold and the energy production information indicates that the output margin at the energy production terminal is greater than or equal to a second proportional threshold.

[0030] The determination module is further configured to use the initial protection threshold as the rigid protection threshold when the state of charge indicates that the amount of electricity at the energy storage terminal is greater than or equal to the first proportional threshold and less than the third proportional threshold, and the energy production information indicates that the output margin at the energy production terminal is less than the second proportional threshold and greater than or equal to the fourth proportional threshold.

[0031] The determining module is further configured to, when the state of charge indicates that the amount of electricity at the energy storage terminal is greater than or equal to the third proportional threshold, or the energy production information indicates that the output margin at the energy production terminal is less than the fourth proportional threshold, increase the initial protection threshold by a second preset ratio to obtain the rigid protection threshold; the first proportional threshold is less than the third proportional threshold, and the second proportional threshold is greater than the fourth proportional threshold;

[0032] An execution module is used to control the switching device at the grid connection point to disconnect when the active power at the grid connection point is less than the rigid protection threshold, using a rigid coordination strategy.

[0033] The execution module is also used to control the operating parameters of the energy storage end and the energy production end by adopting a flexible coordination strategy when the active power at the grid connection point is greater than or equal to the rigid protection threshold.

[0034] In one possible implementation, the execution module is further configured to adjust the operating parameters of the energy storage terminal and the energy production terminal based on the active power of the grid connection point if the time is within a preset time range.

[0035] Otherwise, the execution module is also used to control the disconnection of the energy production terminal from the grid.

[0036] In one possible implementation, the execution module is further configured to adjust the rigid protection threshold based on the adjusted production energy information and the state of charge of the energy storage terminal.

[0037] In one possible implementation, the execution module is further configured to control the energy storage terminal to charge when the active power at the grid connection point is less than a preset first power threshold, and to control the output power of the energy production terminal to be zero when the state of charge indicator of the energy storage segment indicates that the amount of electricity at the energy storage terminal reaches a preset fifth proportional threshold or the charging power of the energy storage terminal reaches a preset second power threshold.

[0038] The execution module is further configured to control the energy storage terminal to charge when the active power at the grid connection point is greater than or equal to the first power threshold and less than the preset third power threshold, and to reduce the output power of the energy production terminal based on the group control power of the energy production terminal indicated by the energy production information when the state of charge of the energy storage segment indicates that the energy storage terminal's charge reaches the fifth proportional threshold or the charging power of the energy storage terminal reaches the second power threshold.

[0039] The execution module is also used to increase the output power of the energy production end based on the group control power and the preset adjustment step size when the active power at the grid connection point is greater than or equal to the third power threshold.

[0040] In one possible implementation, the acquisition module is further configured to acquire the number of times the switching device has been disconnected within a preset time period in the past;

[0041] The execution module is also configured to, if the number of times does not reach the preset number threshold, control the switching device at the grid connection point to disconnect after waiting for a preset delay time; otherwise, issue an alarm.

[0042] Thirdly, embodiments of this application provide a multi-source heterogeneous energy system, including a grid side, a user-side load, at least one energy storage terminal and at least one energy production terminal, with a grid connection point provided between the grid side and the user side;

[0043] The multi-source heterogeneous energy system is applied to various possible implementations of the first aspect and / or the first aspect as described above.

[0044] Fourthly, embodiments of this application provide an electronic device, including: a memory and a processor;

[0045] The memory stores computer-executed instructions;

[0046] The processor executes computer execution instructions stored in the memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0047] Fifthly, 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 first aspect and / or various possible implementations of the first aspect.

[0048] In a sixth aspect, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0049] The coordinated control method, device, multi-source heterogeneous energy system, and storage medium provided in this application embodiment acquire the state of charge of the energy storage end and the energy production information of the energy production end in real time through a data acquisition unit during the operation of the multi-source heterogeneous energy system. Based on the above state information, a rigid protection threshold corresponding to the grid connection point is dynamically determined according to a preset hierarchical mapping rule, so that the threshold is adaptively adjusted with the energy storage capacity and output margin. Then, using the dynamic threshold as a judgment benchmark, a coordinated control of rigid and flexible coordination strategies is executed to reasonably adjust the charging and discharging of the energy storage end and the output power of the energy production end, ensuring grid connection power compliance and stable system operation. Through dynamic threshold and rigid-flexible coordinated control, energy utilization efficiency and system operation stability are significantly improved while ensuring grid anti-reverse current safety. Attached Figure Description

[0050] 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.

[0051] Figure 1 A schematic diagram of a scenario for the coordination and control method provided in this application;

[0052] Figure 2 Flowchart of the coordination and control method provided in this application Figure 1 ;

[0053] Figure 3 Flowchart of the coordination and control method provided in this application Figure 2 ;

[0054] Figure 4 A schematic diagram of the coordination control device provided in this application;

[0055] Figure 5 A schematic diagram of the structure of the electronic device provided in this application.

[0056] 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

[0057] 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 as detailed in the appended claims.

[0058] Existing multi-source heterogeneous energy systems typically employ a combination of grid-connected power monitoring, energy storage charging and discharging control, and power regulation at the production end to achieve coordinated operation. Specifically, the system generally collects load demand, energy storage state of charge, and energy production end output information to determine if there is a risk of backflow of power to the grid. When the risk is low, it prioritizes utilizing energy storage to absorb excess energy or increases the local consumption ratio at the production end. When the risk increases, it suppresses reverse power flow by limiting production end output, switching energy storage operating modes, or triggering grid-connected protection measures.

[0059] In existing solutions, protection thresholds are usually set based on fixed empirical values, lacking a linkage with the energy storage state of charge and the output capacity of the production end. This can lead to premature protection actions when the system has sufficient remaining energy storage capacity and the production end still has a relatively high energy conservation margin, thereby reducing the utilization rate of renewable energy. On the other hand, when the energy storage is close to saturation or the production end output is high, the fixed threshold may not be able to reflect the system risk in a timely manner, resulting in protection lag.

[0060] To address the aforementioned issues, this application proposes a coordinated control method for multi-source heterogeneous energy systems comprising grid-side, user-side loads, energy storage terminals, and energy production terminals. During system operation, the method comprehensively considers the state information of the energy storage terminals and the energy production status of the energy production terminals, obtains the state of charge of the energy storage terminals and the energy production information of the energy production terminals, and dynamically determines the rigid protection threshold corresponding to the grid connection point based on this. Then, based on this rigid protection threshold, different types of control mechanisms are executed in a coordinated manner, thereby improving the coordinated control capability, state adaptability, and recovery stability of multi-source heterogeneous energy systems in grid-connected operation scenarios.

[0061] The coordination control method provided in this application embodiment can be applied to, for example, Figure 1 The application environment shown is as follows. The multi-source heterogeneous energy system includes a grid side, user-side loads, at least one energy storage terminal, and at least one energy production terminal, with a grid connection point between the grid side and the user side.

[0062] Multi-source heterogeneous energy systems can be deployed in industrial and commercial parks, factory microgrids, distributed energy stations, or other integrated energy scenarios that include grid connection points, energy storage units, and power generation units. For example... Figure 1 As shown, a photovoltaic system can consist of multiple photovoltaic inverters, which convert the direct current generated by the photovoltaic modules into alternating current and supply power to the load or the grid. The energy storage system includes energy storage batteries and a power conversion system (PCS), which stores the electrical energy of the photovoltaic system or the grid and releases the energy when needed to balance load demand. The load represents the electrical equipment on the user side, whose power demand changes dynamically over time. The JP cabinet / distribution room, as the control core of the system, has a built-in anti-reverse current controller and can be connected to the photovoltaic system, energy storage system, and grid through IO interfaces and RS485 communication links to realize real-time monitoring and control of the power at the grid connection point.

[0063] The grid connection point of the JP cabinet / distribution room connects to the user-side load, photovoltaic inverter, and energy storage PCS respectively. The photovoltaic inverter and energy storage PCS are connected to the anti-reverse current controller through RS485 / Ethernet communication interfaces. The grid voltage and current detection unit built into the JP cabinet / distribution room transmits the electrical quantity data of the grid connection point to the anti-reverse current controller in real time. The anti-reverse current controller is connected to the grid-connected circuit breaker and can issue trip / close commands to realize rigid protection action.

[0064] Specifically, when there is sufficient sunlight, the photovoltaic system prioritizes supplying power to the user-side load, and excess power is stored in the energy storage battery via the energy storage PCS. When the photovoltaic power generation exceeds the total demand of the load and energy storage charging, the anti-reverse current controller initiates flexible adjustment to dynamically reduce the photovoltaic output or adjust the energy storage charging power. If the flexible adjustment fails, the anti-reverse current controller triggers rigid protection, controls the grid-connected circuit breaker to trip, and disconnects the photovoltaic system from the grid to prevent reverse current.

[0065] Figure 2 A flowchart illustrating a coordination control method provided in this application embodiment. Figure 1 .like Figure 2 As shown in the embodiment of this application, a coordinated control method is provided and applied to a multi-source heterogeneous energy system. The multi-source heterogeneous energy system includes a grid side, a user-side load, at least one energy storage terminal, and at least one energy production terminal. A grid connection point is provided between the grid side and the user side. The method includes:

[0066] S201. During the operation of a multi-source heterogeneous energy system, acquire the state of charge at the energy storage end and the energy production information at the energy production end.

[0067] Among them, the state of charge (SOC) is used to characterize the current available energy level at the energy storage end. Specifically, it can be characterized by one or more parameters among the remaining battery charge percentage, rechargeable capacity, dischargeable capacity, depth of charge / discharge, and equivalent adjustability margin. It can be obtained through real-time data reported by the power conversion system (PCS) or battery management system (BMS). The energy production information is used to reflect the current and short-term output and regulation capabilities of the energy production end. Specifically, it can include one or more of the following: current output power, maximum output power, minimum stable output power, power ramp rate, adjustability margin, historical output trend, and predicted output results. It can be read in real time through the communication interface of the photovoltaic inverter.

[0068] The grid connection point is used to characterize the connection node between the user side and the grid side for energy exchange. The power direction and power magnitude of this node reflect whether there is a risk of the system feeding back into the public grid.

[0069] Understandably, given the heterogeneity of different device interfaces, the data acquisition process can be implemented through Modbus Protocol, Controller Area Network (CAN), Ethernet, IEC (International Electrotechnical Commission) 61850, Message Queuing Telemetry Transport (MQTT), or serial protocol gateway. After receiving the data reported by each device, the coordinating controller performs unified processing on the timestamp, units, and data quality to generate standardized state inputs required for subsequent decision-making.

[0070] Optionally, the status acquisition process can combine periodic polling with event triggering. For example, the coordinating controller can poll the grid-connected power, energy storage state of charge, and production output power at a sampling period of 100 milliseconds to 5 seconds. When the grid-connected power changes rapidly, a shorter sampling interval is used, and when the state of charge changes slowly, a relatively longer sampling interval is used. At the same time, when the change in state of charge exceeds a set threshold, the production power fluctuation exceeds a preset range, the inverter enters a power limiting mode, the energy storage is close to being fully charged or depleted, or a reverse power surge occurs at the grid-connected point, event acquisition is immediately triggered and the status cache is refreshed.

[0071] Furthermore, to ensure the reliability of the control input, the coordinating controller can also perform noise reduction, missing measurement compensation, and outlier removal on the collected data. For example, it can use moving average, exponential smoothing, or Kalman filtering to suppress measurement noise, and call the most recent valid value and model estimate for compensation when a device experiences a short-term communication interruption.

[0072] S202. When the charge level of the energy storage terminal is less than the first proportional threshold and the output margin of the energy production terminal is greater than or equal to the second proportional threshold, the initial protection threshold is reduced by the first preset ratio to obtain the rigid protection threshold.

[0073] S203. When the charge level of the energy storage terminal is greater than or equal to the first proportional threshold and less than the third proportional threshold, and the output margin of the energy production terminal is less than the second proportional threshold and greater than or equal to the fourth proportional threshold, the initial protection threshold shall be used as the rigid protection threshold.

[0074] S204. When the charge level of the energy storage terminal is greater than or equal to the third proportional threshold, or the output margin of the energy production terminal is less than the fourth proportional threshold, the initial protection threshold is increased according to the second preset ratio to obtain a rigid protection threshold.

[0075] Among them, the rigid protection threshold refers to the critical value set by the system to prevent electrical energy from flowing back to the grid side and to ensure the safe operation of the grid. When the reverse active power detected at the grid connection point is lower than this threshold (reaching the reverse over-limit state), the system immediately triggers the rigid coordination strategy, controls the grid connection point switching device to open, and forcibly disconnects the connection between the energy production end and the grid to avoid the risk of reverse flow.

[0076] Understandably, rigid protection thresholds can be represented by a single threshold, such as the upper limit of reverse active power at the grid connection point, or by a combination of multiple parameters, such as a joint criterion of reverse active power amplitude threshold, duration threshold, and rate of change threshold.

[0077] Specifically, the coordinating controller can pre-establish dynamic threshold mapping relationships and calculate the grid connection point rigid protection threshold under the current operating conditions based on the real-time acquired status input. For example, the state of charge can be divided into three or more intervals: low, medium, and high; the adjustable margin (i.e., flexible adjustment capability) at the production end can be divided into three or more intervals: ample, moderate, and strained; and a two-dimensional or three-dimensional mapping table can be formed by combining the local load level of the grid connection point.

[0078] When the state of charge is at a low to medium level, it means that the energy storage can still absorb excess power. At the same time, the production side has a large down-adjustment margin, so the rigid protection threshold can be set to a relatively loose value, allowing the system to absorb fluctuations through flexible control first. When the state of charge is close to the upper limit, it indicates that the energy storage absorption capacity is becoming insufficient. When the production output is close to the available peak and the adjustability margin is reduced, the rigid protection threshold is tightened in order to improve the protection sensitivity in advance before the reverse current expands.

[0079] For example, when a low state of charge is detected at the energy storage end (e.g.) And the output margin on the energy production side is relatively large (e.g.) When the system is deemed to have strong internal absorption potential, in order to maximize photovoltaic power generation efficiency, the initial protection threshold S is reduced (or relaxed) by a first preset ratio to obtain the current target rigid protection threshold (e.g., adjusted to 0.9S).

[0080] Medium level of flexibility: When the state of charge at the energy storage end is in the middle range (e.g.) And the output margin on the energy production side is in the middle range (e.g.) When the initial protection threshold S is reached, the system balance is maintained. At this time, the initial protection threshold S is directly used as the current rigid protection threshold to keep the sensitivity of the rigid protection unchanged.

[0081] The limit of flexible control capability: when the state of charge at the energy storage end is high (e.g.) (e.g., near full charge and unable to recharge) or the output margin on the energy production side is extremely small (e.g., ... When there is no room for further power reduction, the flexible regulation capability is deemed to be on the verge of failure. At this time, in order to prioritize grid safety and prevent reverse current, the initial protection threshold is increased (or tightened) according to the second preset ratio to obtain the current target rigid protection threshold (e.g., adjusted to 1.2S).

[0082] In other words, the closer the flexible adjustment means are to their limit, the more sensitive the action threshold of the rigid protection becomes (threshold tightening), thus avoiding protection failure due to insufficient adjustment capability; conversely, when the adjustment capability is sufficient, the threshold can be appropriately relaxed to reduce unnecessary intervention and improve the system's economy.

[0083] Optionally, the rigid protection threshold can be determined not only based on the current state but also by incorporating short-term forecast information for forward-looking adjustments. For example, a short-term trend forecasting model can be established using the recent irradiance, wind speed, load, and grid connection point power historical sequences from the past few minutes to tens of minutes to predict changes in power output and reverse current risk over a future period. If the forecast indicates that photovoltaic power output will rise rapidly in the near future and energy storage will approach saturation, the rigid protection threshold can be tightened in advance to prevent delayed protection actions. If the forecast indicates that cloud cover will cause a decrease in power output and energy storage has a large charging margin, a more lenient threshold can be maintained temporarily to reduce unnecessary power rationing.

[0084] S205. When the active power at the grid connection point is less than the rigid protection threshold, a rigid coordination strategy is adopted to control the switching device at the grid connection point to disconnect.

[0085] S206. When the active power at the grid connection point is greater than or equal to the rigid protection threshold, a flexible coordination strategy is adopted to control the operating parameters of the energy storage end and the energy production end.

[0086] Rigid coordination strategies are used to prevent further escalation of risks when grid connection safety approaches or exceeds the boundary through rapid and deterministic actions. These actions may include, for example, grid-connected circuit breakers, inverter anti-backflow control interfaces, energy storage converter emergency stop control interfaces, or grid-connected protection devices. Flexible coordination strategies, on the other hand, are used to reduce grid connection point backflow risks by continuously or progressively adjusting the operating parameters of energy storage and production terminals without disrupting continuous system operation. These actions may include, for example, energy storage charging and discharging power setpoints, production terminal active power limits, power limiting ratios, power ramp-up rates, reactive power support commands, and local load absorption and allocation strategies.

[0087] Understandably, a rigid coordination strategy (fast response path) can monitor the active power at the grid connection point in real time at millisecond intervals (e.g., 20ms). For example, when the monitored active power is less than the current rigid protection threshold (i.e., reverse power occurs and exceeds the set limit), it is determined to be a serious reverse current fault, and rigid protection actions are immediately executed, that is, the switching device (circuit breaker) at the grid connection point is controlled to open, physically disconnecting the grid connection to ensure grid safety. A flexible coordination strategy (smooth adjustment path) can monitor the power at the grid connection point and the system operating status at second intervals (e.g., 1s). For example, when the monitored active power is greater than or equal to the rigid protection threshold (i.e., within a controllable range or with a slight risk of reverse current), it is determined that there is no need for a physical grid disconnection, and a flexible coordination strategy is adopted instead.

[0088] When the grid-connected power is within a safe range but close to the threshold, the system enters a flexible priority adjustment phase. At this time, if the grid-connected point shows a reverse power growth trend, the coordinating controller prioritizes sending charging power increase commands to the energy storage end, causing the energy storage converter to increase its charging power at a predetermined slope to absorb local surplus power generation; when a single energy storage branch is insufficient to fully absorb the surplus power, a power limiting control command is then sent to one or more energy production ends to adjust the inverter's active power output limit to a new target value, and if necessary, its ramp rate is limited to avoid grid-connected power oscillations caused by excessively fast responses from the production ends.

[0089] If the system contains multiple energy storage units and multiple production units, the coordinating controller can allocate power based on each unit's current state of charge, rated power, response speed, and conversion efficiency. For example, energy storage units with lower state of charge and faster response speeds can be assigned higher charging tasks, while photovoltaic inverters that are close to their power limits and have greater flexibility in power reduction can be assigned a higher power curtailment ratio.

[0090] When the grid-connected power has exceeded the rigid protection threshold, or when the duration and rate of change of the exceedance, although not exceeding the limit, meet the emergency criteria, the coordinating controller executes a rigid coordination strategy. The rigid coordination strategy may include immediately issuing a circuit breaker trip command, disconnecting the grid connection, and preventing further reverse power transmission to the grid; it may also include rapid actions such as triggering the inverter to enter zero-output mode, forcing energy storage to switch to maximum absorption mode, and blocking commands to continue increasing power output at the production end.

[0091] The specific operating parameters may include the charging power, discharging power, charging / discharging switching time, allowable output range, and target range of state of charge at the energy storage end, and may also include the active power output, reactive power output, power limiting ratio, recovery rate, and ramping constraints at the energy production end.

[0092] Specifically, when a flexible coordination strategy is adopted, the system can further dynamically adjust the operating parameters of the energy storage end and the energy production end based on the current time and power range.

[0093] Time-based mandatory control, that is, if the current time is not within the preset photovoltaic working time range (e.g., the period from sunrise to sunset). ,in, Sunrise time If the power generation is off the grid (stop working) during sunset or during a specific nighttime recovery period (e.g., it is currently 1 a.m. and the nighttime recovery flag is 0), the power generation end will be directly shut down to prevent accidental power generation.

[0094] Power level adjustment can be specifically divided into:

[0095] In low-reverse-current risk areas, if the active power at the grid connection point is less than the first power threshold... Prioritize charging the energy storage unit to absorb excess electricity; if the energy storage is fully charged or charging is limited, issue an instruction. Gradually reduce the output power at the energy production end.

[0096] In the mid-current risk zone, if the active power at the grid connection point is between the first and third thresholds... Continue to utilize energy storage for charging, and combine this with the group control power at the energy production end to proportionally (e.g., using a binary method) reduce the output at the production end. That is, if the energy storage SOC is too high or the charging power has reached its limit, calculate based on the configurable parameter K. Where N is the current group control power percentage, and K is the current percentage parameter, which defaults to 2.

[0097] In the safe release zone, if the active power at the grid connection point is greater than the third power threshold (i.e. If power is drawn from the positive side, restrictions will be lifted or the output power of the energy production end will be gradually increased to maximize the use of clean energy.

[0098] Optionally, for scenarios with high grid connection protection requirements, the coordinating controller can directly call the protection relay interface, enabling the protection device to complete the action on a millisecond or cycle-level time scale, thereby ensuring grid connection compliance.

[0099] It should be noted that, to prevent the system from falling into a prolonged standstill after rigid actions, this application embodiment further embeds a flexible coordination strategy into the recovery process after protection. That is, after the circuit breaker trips or the zero-power-out mode takes effect, the coordination controller can continue to collect data on the energy storage state of charge, the output capacity of the production end, and the load demand on the user side. Based on the currently adjustable resources, it redistributes the energy storage charging power and the production end power limiting ratio, actively adjusting the internal power balance of the system to a state that can meet safe grid connection requirements. When the estimated reverse power at the grid connection point drops below the recovery threshold and remains there for a certain period, the coordination controller then sends a reclosing permission signal to the grid connection switch or removes the zero-power-out forced state, allowing the system to resume grid connection operation under safe conditions. This forms a closed-loop control system of "flexible adjustment first, rigid protection as a fallback, and flexible recovery after protection."

[0100] In some embodiments, the above method can also be extended to heterogeneous energy scenarios involving wind power, fuel cells, hybrid energy storage, and adjustable loads. As long as it can dynamically adjust the grid connection protection threshold based on storage and production status and coordinate the execution of rigid and flexible control, it can fall within the technical concept of the embodiments of this application, and this application does not limit it.

[0101] This application provides a coordinated control method that, during the operation of a multi-source heterogeneous energy system, acquires the state of charge (SOC) of the energy storage end and the energy production information of the energy production end in real time through a data acquisition unit. Based on the aforementioned SOC information, a rigid protection threshold corresponding to the grid connection point is dynamically determined according to a preset hierarchical mapping rule, allowing the threshold to adaptively adjust with the energy storage capacity and output margin. Then, using this dynamic threshold as a judgment benchmark, a coordinated control of rigid and flexible coordination strategies is executed to rationally adjust the charging and discharging of the energy storage end and the output power of the energy production end, ensuring grid connection power compliance and stable system operation. Through dynamic thresholds and rigid-flexible coordinated control, energy utilization efficiency and system operational stability are significantly improved while ensuring grid backflow prevention safety.

[0102] Figure 3 A flowchart illustrating a coordination control method provided in this application embodiment. Figure 2 .like Figure 3 As shown, the embodiments of this application are in Figure 2 Based on the embodiments, a coordinated control method is further described in detail; the method includes:

[0103] S301. During the operation of a multi-source heterogeneous energy system, acquire the state of charge at the energy storage end and the energy production information at the energy production end.

[0104] Step S301 is similar to step S201 described above, and will not be repeated here.

[0105] S302. When the charge level of the energy storage terminal is less than the first proportional threshold and the output margin of the energy production terminal is greater than or equal to the second proportional threshold, the initial protection threshold is reduced by the first preset ratio to obtain the rigid protection threshold.

[0106] S303. When the charge level of the energy storage terminal is greater than or equal to the first proportional threshold and less than the third proportional threshold, and the output margin of the energy production terminal is less than the second proportional threshold and greater than or equal to the fourth proportional threshold, the initial protection threshold shall be used as the rigid protection threshold.

[0107] S304. When the charge level of the energy storage terminal is greater than or equal to the third proportional threshold, or the output margin of the energy production terminal is less than the fourth proportional threshold, the initial protection threshold is increased according to the second preset ratio to obtain a rigid protection threshold.

[0108] Among them, the first proportional threshold is less than the third proportional threshold, and the second proportional threshold is greater than the fourth proportional threshold.

[0109] The initial protection threshold can be the baseline threshold for reverse power protection at the grid connection point; the first and third proportional thresholds are used to adjust the rigid protection threshold in stages; the second and fourth proportional thresholds are used to determine the photovoltaic output margin. The first proportional threshold is less than the third proportional threshold and is used to divide the energy storage capacity into low, medium, and high ranges; the second proportional threshold is greater than the fourth proportional threshold and is used to divide the output margin into high, medium, and low ranges.

[0110] Understandably, after receiving the state of charge and energy production information, the controller compares the two against thresholds and selects the corresponding threshold adjustment coefficient accordingly.

[0111] Specifically, when the state of charge indicator (SCH) of the energy storage terminal is less than a first proportional threshold, and the energy production information indicates that the output margin of the energy production terminal is greater than or equal to a second proportional threshold, it indicates that the current energy storage charging capacity is sufficient and the photovoltaic regulation capability is strong. The pre-set initial protection threshold is then reduced according to a first preset ratio to obtain the currently applicable rigid protection threshold. In other words, when the energy storage capacity is low and the production terminal still has a large output margin, the system considers the local absorption capacity to be strong and reduces the initial protection threshold according to the first preset ratio, thus adjusting the rigid protection threshold towards a more lenient direction and reducing premature triggering of protection.

[0112] When the state of charge (SBC) indicates that the energy storage capacity is greater than or equal to the first proportional threshold and less than the third proportional threshold, and the energy production information indicates that the output margin of the energy production end is less than the second proportional threshold and greater than or equal to the fourth proportional threshold, it indicates that the current flexible regulation capability is within the normal range, and the initial protection threshold is directly used as the current rigid protection threshold. That is, when the energy storage capacity is in the middle range and the output margin of the production end is in the medium range, the system maintains the initial protection threshold unchanged to maintain a stable grid connection criterion.

[0113] When the state of charge indicator shows that the energy storage capacity is greater than or equal to the third proportional threshold, or when the energy production information indicates that the output margin of the energy production end is less than the fourth proportional threshold, it indicates that the energy storage is nearly fully charged and the photovoltaic system has insufficient downward adjustment space. The initial protection threshold is then increased according to the second preset proportion to obtain the current rigid protection threshold. In other words, when the energy storage capacity is high or the output margin at the production end is low, the system considers the reverse current risk to be increased and increases the initial protection threshold according to the second preset proportion to limit the power deviation at the grid connection point in advance.

[0114] S305. When the active power at the grid connection point is less than the rigid protection threshold, obtain the number of times the switching device has been disconnected within a preset time period in the past.

[0115] S306. If the number of attempts does not reach the preset threshold, the switch at the grid connection point shall be disconnected after a preset delay period; otherwise, an alarm shall be issued.

[0116] Among them, the switching device is used to realize the on-off control between the grid connection point and the public power grid. It usually includes circuit breakers, contactors or relay switches. The preset duration can correspond to the statistical window within the most recent minutes, hours or one operating cycle, which is used to represent the historical disconnection frequency of the switching device.

[0117] The preset threshold number is used to limit the maximum number of disconnections allowed within the statistics window, and the preset delay time is used to buffer and confirm the disconnection command in order to avoid malfunctions caused by voltage fluctuations, instantaneous power disturbances or short-term control jitter.

[0118] Understandably, the number of disconnections can be counted by the controller in combination with switch position feedback signals, open / close status variables, or event log information, and can be written into the storage unit to form a traceable historical record.

[0119] Specifically, after receiving the disconnection trigger condition, the controller can read the number of disconnections within a preset time period (such as within 24 hours) and compare it with the preset number threshold.

[0120] When the number of disconnections detected by the switching device does not exceed the preset threshold, it indicates that the system is operating stably without any continuous abnormal fluctuations. At this time, the system waits for a preset delay time t (e.g., 500ms) to ensure a stable transition of the downstream load. Subsequently, it issues a command to control the switching device at the grid connection point to perform a disconnection operation, thereby implementing the anti-reverse current protection action. After the delay time t expires, if the conditions triggering the disconnection (such as a reverse current signal) still exist, a tripping command is sent to the switching device at the grid connection point to control its disconnection and cut off the connection between the photovoltaic system and the grid.

[0121] When the number of times the switching device disconnects exceeds or equals a preset threshold within a statistical period, the system is determined to be in an unstable state or have potential fault risks (such as frequent load surges or abnormal energy storage response). To prevent equipment damage due to frequent operations, the system immediately stops executing the switch tripping command and issues an alarm signal. This alarm signal can be uploaded to the host computer monitoring platform or pushed to the mobile terminal of maintenance personnel, triggering audible and visual alarms or fault recordings, so that maintenance personnel can promptly investigate and resolve the root cause. The specific alarm method is not limited in this application.

[0122] S307. If the active power at the grid connection point is greater than or equal to the rigid protection threshold, and if it is within a preset time range, adjust the working parameters of the energy storage end and the energy production end based on the active power at the grid connection point; otherwise, control the energy production end to disconnect from the grid.

[0123] Active power can be collected in real time through grid-connected metering devices, anti-backflow detection devices, or grid-connected protection units.

[0124] Specifically, the controller compares the active power at the grid connection point with the rigid protection threshold. When the detected value is less than the threshold, that is, the active power at the current grid connection point is less than the rigid protection threshold, it is determined that there is a risk of reverse power transmission or a risk of exceeding the grid connection constraint. At this time, the system can choose to prioritize the rigid coordination strategy. For example, it can generate a circuit breaker trip command to control the switching device (such as a circuit breaker) at the grid connection point to open, physically disconnecting the electrical connection between the user-side photovoltaic energy storage system and the power grid, so that the grid connection point is quickly disconnected from the public power grid to suppress the continued expansion of the reverse current.

[0125] When the detected value is greater than or equal to the threshold, that is, when the active power of the current grid-connected point is greater than or equal to the rigid protection threshold, the system is determined to be in a safe operating range or has adjustment capability. At this time, the system can adopt a flexible coordination strategy. For example, based on the power deviation of the current grid-connected point, a power adjustment command is generated, the controller maintains the grid connection, and the control target is allocated to the energy storage end and the energy production end. By adjusting the energy storage charging and discharging power, the power limiting ratio, the ramp rate, or the power allocation coefficient, the active power of the grid-connected point is kept within the threshold constraint range, thereby achieving continuous adjustment.

[0126] Optionally, to improve control stability, the threshold comparison can be combined with short-time filtering results or hysteresis criteria to avoid frequent switching of control states when power fluctuates near the threshold.

[0127] The preset time range can correspond to the recovery observation time after tripping, the grid connection condition verification time, or the flexible adjustment allowable execution time. Its start and end times can be determined by the controller based on the circuit breaker action signal, the grid connection status signal, or the timer trigger signal. In addition, the time range can also be set in combination with the historical recovery success rate, the current load fluctuation range, and the output capacity of the energy production end. This application embodiment does not limit this.

[0128] When the power is within the preset time range, the controller adjusts the operating parameters of the energy storage end and the energy production end in conjunction with the deviation between the active power of the grid connection point and the preset power boundary, so that the active power of the grid connection point gradually returns to the safe range.

[0129] Optionally, the controller can prioritize increasing the charging power of the energy storage end to absorb excess electricity, or reduce the output power of the energy production end to reduce reverse current; when the energy storage end is close to full charge or is limited by the charging power boundary, the controller can further reduce the output of the energy production end to avoid continuous reverse active power at the grid connection point.

[0130] If the active power at the grid connection point fails to recover to the allowable range after a preset time period, the energy production end will be disconnected from the grid to prevent continuous injection of active power into the grid connection point. Disconnection can be achieved by reducing the inverter output to zero, disabling grid connection, cutting off the grid connection switch, or sending a shutdown command, causing the energy production end to stop supplying energy to the grid side. The energy storage end can remain charging, in standby mode, or maintain its current state for subsequent recovery and adjustment.

[0131] Furthermore, based on the active power at the grid connection point, the operating parameters of the energy storage and energy production ends are adjusted, including:

[0132] When the active power at the grid connection point is less than the preset first power threshold, the energy storage end is controlled to charge, and when the state of charge indicator of the energy storage end reaches the preset fifth proportional threshold or the charging power of the energy storage end reaches the preset second power threshold, the output power of the energy production end is controlled to be zero.

[0133] When the active power at the grid connection point is greater than or equal to the first power threshold and less than the preset third power threshold, the energy storage end is controlled to charge. When the state of charge indicator of the energy storage segment indicates that the energy storage end's charge reaches the fifth proportional threshold or the charging power of the energy storage end reaches the second power threshold, the output power of the energy production end is reduced based on the group control power of the energy production end indicated by the energy production information.

[0134] When the active power at the grid connection point is greater than or equal to the third power threshold, the output power at the energy production end is increased based on the group control power and the preset adjustment step size.

[0135] Among them, the group control power is the sum of the available output power of multiple production terminals under unified scheduling. The adjustment step size is used to limit the magnitude of each power correction to avoid sudden output changes. The fifth proportional threshold is used to indicate the preset upper limit ratio of the energy storage state of charge (SOC) to determine whether the energy storage terminal is close to being fully charged and can no longer absorb excess power, and whether it is necessary to trigger photovoltaic power curtailment / shutdown.

[0136] In implementation, after receiving the active power and energy storage state of charge from the grid connection point, the controller first determines whether the current power is lower than the first power threshold. When this condition is met, the controller sends a charging command to the energy storage converter, enabling the energy storage terminal to absorb redundant power in the system, and continuously monitors the energy storage charging power and state of charge. When either quantity reaches the second power threshold... When the fifth proportional threshold (i.e., the energy storage SOC is too high) is reached, a shutdown or zero-limit command is immediately sent to the energy production end to reduce its output power to zero, thereby suppressing backfeeding to the grid.

[0137] When the grid connection point power is between the first power threshold and the third power threshold At this time, the system continues to charge the energy storage, but when the energy storage is close to the acceptable upper limit, it no longer directly shuts down. Instead, it gradually reduces the output of the production end according to the group control power, so that the total output slowly decreases in order to maintain the power balance at the grid connection point.

[0138] When the grid connection point power reaches or exceeds the third power threshold ( When the system has a greater grid connection and absorption capacity, the controller incrementally corrects the group control power according to the adjustment step size and sends the corrected power command to each energy production unit to improve the local power generation utilization rate. Where S is a preset fixed increment, which is gradually increased ,until To prevent sudden changes, the output power of energy production should be gradually increased, maximizing the utilization rate of clean energy power generation while ensuring no backflow.

[0139] In practical applications, the controller can be implemented by an industrial controller or an edge computing gateway, and this application embodiment does not limit this.

[0140] The control logic uses grid connection point power as the primary criterion and energy storage status as the secondary criterion, linking energy storage charging with production-side regulation. This allows for priority absorption of redundant power in the low-power range, gradual power reduction in the intermediate power range, and step-by-step power increase in the high-power range, thus forming a tiered coordinated control mechanism.

[0141] During its operation, each threshold is preset by the operating parameters and can be updated with the system status. The controller completes sampling, judgment and command issuance in each control cycle to ensure that the actions of the energy storage end and the energy production end are coordinated.

[0142] In one optional embodiment, after adjusting the production energy information at the energy production end based on the active power at the grid connection point, the method further includes: adjusting the rigid protection threshold based on the adjusted production energy information and the state of charge at the energy storage end.

[0143] After adjusting the energy production information at the energy production end based on the active power at the grid connection point, the controller sends the adjustment result back to the threshold calculation unit and recalculates the rigid protection threshold in conjunction with the currently collected state of charge.

[0144] Understandably, the calculation process can determine the remaining regulation capacity on the production side based on the adjusted production energy information, and then determine the absorption capacity on the energy storage side based on the energy storage charge status. The two together determine the extent to which the protection threshold is relaxed or tightened.

[0145] When the adjusted production energy information indicates that the production end has been significantly limited, and the state of charge shows that the energy storage end still has a large charging space, the threshold can be appropriately relaxed to avoid the grid connection point triggering rigid protection too early; when the adjusted production energy information still indicates that the production end maintains a high output, and the state of charge is close to the upper limit, the threshold can be tightened accordingly to improve the sensitivity to the risk of reverse power transmission.

[0146] It should be noted that the threshold adjustment unit can be implemented by the controller's built-in memory and arithmetic module, or it can be completed by an independent edge controller. The arithmetic module can output a new rigid protection threshold by using a lookup table, piecewise function, or weighted calculation method.

[0147] In one possible embodiment, after the switching device is disconnected due to reverse current protection, the system enters the closing and recovery phase. When the power, voltage, and frequency at the grid connection point meet the preset grid connection conditions, the switching device is controlled to close again.

[0148] Specifically, when the system detects a tripping event, the control unit first performs fault confirmation and delay waiting. After the preset safety delay ends, if the grid voltage and frequency return to the normal range and there are no other locking faults within the system, the control unit will generate a closing command to drive the switching device (such as a circuit breaker or contactor) at the grid connection point to close again, completing the restoration of the physical connection.

[0149] After detecting the closing status confirmation signal, the control unit activates the power boost timer and gradually increases the output power of the energy production end according to a preset fixed increment S, starting from a low power level. At the same time, it monitors the grid connection point power and the energy storage charge status in real time. After each level increase, it maintains stable operation for a period of time to confirm that there is no risk of reverse current before continuing to increase the power until it is restored to the normal output level, achieving a smooth, shock-free, and oscillation-free grid connection recovery.

[0150] This application provides a coordinated control method that dynamically determines rigid protection thresholds based on real-time acquisition of energy storage SOC and photovoltaic output information. It adjusts energy storage charging and photovoltaic output in stages according to the active power at the grid connection point, shutting down or reducing photovoltaic power when energy storage reaches its limit, and increasing photovoltaic output when the load is sufficient. After adjustment, the thresholds are updated in a closed loop, and the number of trips of switching devices is counted periodically. Trips are delayed if the threshold is not exceeded, and alarms are triggered if the threshold is exceeded, achieving coordinated operation of rigid protection and flexible adjustment. This solution dynamically matches system status to adjust protection thresholds, balancing grid safety and photovoltaic absorption efficiency; graded flexible adjustment reduces tripping, and closed-loop control improves accuracy; simultaneously, it limits frequent switch actions and triggers alarms, extending equipment lifespan, avoiding repeated oscillations, and significantly improving system stability, safety, and economy.

[0151] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0152] Based on the same inventive concept, this application also provides a coordination control device for implementing the coordination control method described above. The solution provided by this coordination control device is similar to the solution described in the coordination control method above. Therefore, the specific limitations in one or more device embodiments provided below can be found in the limitations of the coordination control method above, and will not be repeated here.

[0153] In one embodiment, such as Figure 4 As shown in the embodiment of this application, a coordination control device 400 is provided, which is applied to a multi-source heterogeneous energy system. The multi-source heterogeneous energy system includes a grid side, a user-side load, at least one energy storage terminal, and at least one energy production terminal. A grid connection point is provided between the grid side and the user side. The coordination control device 400 includes:

[0154] The acquisition module 401 is used to acquire the state of charge of the energy storage end and the energy production information of the energy production end during the operation of the multi-source heterogeneous energy system.

[0155] The determination module 402 is used to reduce the preset initial protection threshold by a first preset ratio to obtain a rigid protection threshold when the power of the energy storage terminal indicated by the state of charge is less than the first proportional threshold and the output margin of the energy production terminal indicated by the energy production information is greater than or equal to the second proportional threshold.

[0156] The determination module 402 is also used to treat the initial protection threshold as a rigid protection threshold when the charge state indicator energy storage terminal has a charge level greater than or equal to the first proportional threshold and less than the third proportional threshold, and the energy production information indicator energy production terminal has an output margin less than the second proportional threshold and greater than or equal to the fourth proportional threshold.

[0157] The determination module 402 is also used to increase the initial protection threshold by a second preset ratio to obtain a rigid protection threshold when the charge state indicator energy storage terminal has a charge level greater than or equal to a third proportional threshold, or the energy production information indicator energy production terminal has an output margin less than a fourth proportional threshold.

[0158] The first proportional threshold is less than the third proportional threshold, and the second proportional threshold is greater than the fourth proportional threshold.

[0159] The execution module 403 is used to control the switching device at the grid connection point to disconnect when the active power at the grid connection point is less than the rigid protection threshold, using a rigid coordination strategy.

[0160] The execution module 403 is also used to control the operating parameters of the energy storage end and the energy production end by adopting a flexible coordination strategy when the active power at the grid connection point is greater than or equal to the rigid protection threshold.

[0161] In one possible implementation, the execution module 403 is further configured to adjust the operating parameters of the energy storage end and the energy production end based on the active power of the grid connection point if the time is within a preset time range.

[0162] Otherwise, the execution module 403 is also used to control the disconnection of energy production from the grid.

[0163] In one possible implementation, the execution module 403 is further configured to adjust the rigid protection threshold based on the adjusted production energy information and the state of charge of the energy storage terminal.

[0164] In one possible implementation, the execution module 403 is further configured to control the energy storage terminal to charge when the active power at the grid connection point is less than a preset first power threshold, and to control the output power of the energy production terminal to be zero when the energy storage terminal's charge state indicator reaches a preset fifth proportional threshold or the charging power of the energy storage terminal reaches a preset second power threshold.

[0165] The execution module 403 is also used to control the charging of the energy storage terminal when the active power at the grid connection point is greater than or equal to the first power threshold and less than the preset third power threshold, and to reduce the output power of the energy production terminal based on the group control power of the energy production terminal indicated by the energy production information when the state of charge indication of the energy storage segment reaches the fifth proportional threshold or the charging power of the energy storage terminal reaches the second power threshold.

[0166] The execution module 403 is also used to increase the output power of the energy production end based on the group control power and the preset adjustment step size when the active power at the grid connection point is greater than or equal to the third power threshold.

[0167] In one possible implementation, the acquisition module 401 is further configured to acquire the number of times the switching device has been disconnected within a preset time period in the past;

[0168] The execution module 403 is also used to control the switching device at the grid connection point to disconnect after waiting for a preset delay time if the number of times has not reached the preset number threshold; otherwise, it issues an alarm.

[0169] Each module in the above-mentioned device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0170] Figure 5 A schematic diagram of the structure of the electronic device provided in this application. Figure 5As shown, the electronic device 500 provided in this embodiment includes at least one processor 501 and a memory 502. Optionally, the electronic device 500 further includes a communication component 503. The processor 501, memory 502, and communication component 503 are connected via a bus 504.

[0171] In a specific implementation, at least one processor 501 executes computer execution instructions stored in memory 502, causing at least one processor 501 to perform the above-described method.

[0172] The specific implementation process of processor 501 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0173] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0174] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0175] 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. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0176] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0177] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0178] The aforementioned readable 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 readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0179] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0180] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components 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 units, and may be electrical, mechanical, or other forms.

[0181] The units described as separate components may or may not be physically separate. The components shown as units 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 units can be selected to achieve the purpose of this embodiment according to actual needs.

[0182] In addition, the functional units 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.

[0183] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0184] 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.

[0185] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A coordinated control method characterized by, It is applied to a multi-source heterogeneous energy system, which includes a grid side, a user-side load, at least one energy storage terminal and at least one energy production terminal, with a grid connection point between the grid side and the user side; The method includes: During the operation of the multi-source heterogeneous energy system, the state of charge of the energy storage end and the energy production information of the energy production end are acquired. When the state of charge indicates that the amount of electricity in the energy storage terminal is less than a first proportional threshold, and the energy production information indicates that the output margin of the energy production terminal is greater than or equal to a second proportional threshold, the preset initial protection threshold is increased according to a first preset ratio to obtain a rigid protection threshold. When the state of charge indicates that the amount of electricity at the energy storage terminal is greater than or equal to the first proportional threshold and less than the third proportional threshold, and the energy production information indicates that the output margin at the energy production terminal is less than the second proportional threshold and greater than or equal to the fourth proportional threshold, the initial protection threshold shall be used as the rigid protection threshold. When the state of charge indicates that the amount of electricity in the energy storage terminal is greater than or equal to the third proportional threshold, or when the energy production information indicates that the output margin of the energy production terminal is less than the fourth proportional threshold, the initial protection threshold is reduced according to the second preset ratio to obtain the rigid protection threshold; the first proportional threshold is less than the third proportional threshold, and the second proportional threshold is greater than the fourth proportional threshold. If the active power at the grid connection point is less than the rigid protection threshold, a rigid coordination strategy is adopted to control the switching device at the grid connection point to disconnect. If the active power at the grid connection point is greater than or equal to the rigid protection threshold, and if within a preset time range, the active power at the grid connection point is less than a preset first power threshold, the energy storage terminal is controlled to charge, and when the state of charge indicator of the energy storage terminal indicates that the energy storage terminal's charge reaches a preset fifth proportion threshold or the charging power of the energy storage terminal reaches a preset second power threshold, the output power of the energy production terminal is controlled to be zero. When the active power at the grid connection point is greater than or equal to the first power threshold and less than the preset third power threshold, the energy storage terminal is controlled to charge. When the state of charge of the energy storage terminal indicates that the energy storage terminal's charge reaches the fifth proportional threshold or the charging power of the energy storage terminal reaches the second power threshold, the output power of the energy production terminal is reduced based on the group control power of the energy production terminal indicated by the energy production information. When the active power at the grid connection point is greater than or equal to the third power threshold, the output power of the energy production end is increased based on the group control power and the preset adjustment step size. Otherwise, the energy production end will be shut down from the grid.

2. The method according to claim 1, characterized in that, The method further includes: Based on the adjusted production energy information and the state of charge of the energy storage terminal, the rigid protection threshold is adjusted.

3. The method according to claim 1, characterized in that, The rigid coordination strategy adopted to control the switching device at the grid connection point to disconnect includes: The number of times the switching device has been disconnected within a preset time period is obtained; If the number of attempts does not reach the preset threshold, the switching device at the grid connection point will be disconnected after a preset delay period; otherwise, an alarm will be issued.

4. A coordination control device, characterized in that, It is applied to a multi-source heterogeneous energy system, which includes a grid side, a user-side load, at least one energy storage terminal and at least one energy production terminal, with a grid connection point between the grid side and the user side; The device is used to implement the coordinated control method as described in claim 1 above.

5. A multi-source heterogeneous energy system, characterized in that, It includes loads on the grid side and the user side, at least one energy storage terminal and at least one energy production terminal, with a grid connection point between the grid side and the user side; The multi-source heterogeneous energy system is applied to the coordinated control method as described in any one of claims 1 to 3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the coordination control method according to any one of claims 1 to 3.

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