A method and system for collaborative control of equipment safety and core load power supply of an offshore wind-light-storage system in a typhoon mode

Abstract

The application belongs to the technical field of offshore wind power typhoon resistance control, and discloses a kind of equipment safety and core load power supply collaborative control method and system of offshore wind light storage system typhoon resistance mode, constructs three-level wind speed interval judgment mechanism, is classified according to wind speed prediction and real-time wind speed Judgment, first interval executes energy storage pre-charging and yaw deployment in advance, second interval issues load reduction instructions through wind weight, energy storage state of charge and emergency load power collaborative weighting, third interval executes shutdown and off-grid emergency power supply, through multi-dimensional weighting calculation of wind weight, energy storage state of charge and emergency load power, determine the order of instruction issuance by the size of instruction weight, by collecting actual operating data and comparing with the preset target value, when the deviation is out of limit, re-execute wind speed judgment and instruction weight calculation and issue correction instruction, form a closed loop control, so that the system always maintains the balance between equipment safety and core load power supply in the process of typhoon dynamic change.

Description

Technical Field

[0001] This invention belongs to the field of offshore wind power typhoon resistance control technology, specifically a method and system for coordinated control of equipment safety and core load power supply in the typhoon resistance mode of offshore wind, solar and energy storage systems. Background Technology

[0002] In the distributed architecture of offshore wind power with "one turbine and one storage", each wind turbine is equipped with an independent energy storage unit. Under typhoon conditions, both the protection of wind turbine equipment and the power supply of emergency loads rely on energy storage support. There is a coordinated need for energy allocation between the two. How to ensure equipment safety and core load power supply at the same time with limited energy storage capacity is the difficulty of typhoon control.

[0003] Existing typhoon defense and control methods have shortcomings in terms of judgment logic classification, multi-source data coordination, and command issuance priority, resulting in premature overdraft of energy storage or excessive defense of wind turbines, low control accuracy, and delayed response of high-risk wind turbines.

[0004] Current offshore wind power typhoon control technologies mainly employ trigger-based control schemes based on a single wind speed threshold. When the measured wind speed exceeds a preset shutdown threshold, the turbine is directly shut down, and energy storage discharge is initiated simultaneously. Some schemes use fixed-ratio load reduction when the wind speed approaches the threshold, with the load reduction rate executed according to the fixed slope set at the turbine's factory. The energy storage system begins charging at fixed times before the typhoon arrives. When multiple turbines simultaneously enter warning status, control commands are issued in a first-come, first-served order, without establishing a differentiated response mechanism based on risk priority. The three types of data—wind radius, energy storage state of charge, and emergency load demand—are used independently, failing to form a unified decision-making basis.

[0005] The above-mentioned solutions have inherent flaws. Relying solely on a single shutdown wind speed trigger for control ignores the transitional phases of pre-charging energy storage and gradual turbine load reduction. The single threshold triggering method fails to consider the intermediate states that should exist between the turbine's normal operation and shutdown, resulting in insufficient emergency response capabilities. The lack of simultaneous collection of parameters such as wind zone range and emergency load power means that relying solely on real-time wind speed cannot predict when the turbine will enter the wind zone, easily leading to control lag. The absence of a wind zone, state of charge, and load coordination weighting mechanism, coupled with the first-come-first-served order of command issuance, means that turbines within a level 10 wind zone but with low energy storage state of charge cannot be prioritized for charging, resulting in chaotic load priority during emergency power supply. Furthermore, the photovoltaic system lacks special handling for typhoon conditions, and the risk of damage to photovoltaic modules due to strong winds is not effectively managed. Summary of the Invention

[0006] This invention provides a method and system for coordinated control of equipment safety and core load power supply in the typhoon-resistant mode of offshore wind, solar and energy storage systems. It solves the problem that existing typhoon-resistant control methods lack hierarchical coordination and priority scheduling means, which leads to conflicts between equipment protection and power supply guarantee.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A method for coordinated control of equipment safety and core load power supply in an offshore wind-solar-storage system under typhoon resistance mode includes the following steps: Acquire typhoon data, wind turbine typhoon resistance parameters, energy storage status of charge, photovoltaic operating status, and emergency load power data; Based on the typhoon data and the wind turbine's typhoon resistance parameters, wind speed is determined to identify the current wind speed range. When the wind speed range is a level one wind speed range that is less than the safe wind speed threshold, the level one equipment action is executed: the wind turbine yaw system is aligned with the wind direction, the energy storage is connected to the grid for charging and backup, and the photovoltaic system is switched to the limited supply mode to maintain its own monitoring power supply. When the wind speed range is a secondary wind speed range that is greater than or equal to the safe wind speed threshold and less than the shutdown wind speed threshold, the secondary equipment action is executed: the wind turbine is reduced in load, the command weight of each wind turbine is calculated according to the wind ring weight, energy storage charge status and emergency load power, and the load reduction command is issued in the order of the command weight. When the wind speed range is a level 3 wind speed range that is greater than or equal to the shutdown wind speed threshold, level 3 equipment actions are executed: the wind turbine is shut down, the energy storage is switched to off-grid mode to perform emergency power supply, and the photovoltaic output is limited. After the device performs the action, actual operating data is collected, and the control command is dynamically corrected based on the deviation between the actual operating data and the preset target value.

[0008] Preferably, the upper limit of the output of the wind turbine during unloaded operation is calculated according to the following formula:

[0009] in, The upper limit of output, This refers to the rated power of the fan. To cut off the wind speed, For real-time wind speed, To determine the cut-in wind speed.

[0010] Preferably, the instruction weight is calculated according to the following formula:

[0011] in, For the first Typhoon command weighting For the first The weight of the wind ring of a typhoon generator. For the first State of charge of typhoon storage Upper limit of state of charge State of charge limit , For the first Emergency load power of typhoon turbines This represents the total emergency load power of the entire site. These are the weighting coefficients.

[0012] Preferably, the wind circle weight is determined according to the wind circle range where the wind turbine is located: the wind circle weight in the prediction zone of level 10 wind circle is higher than the weight in the wind circle of level 7 wind circle.

[0013] Preferably, during the operation of the primary equipment, the charging power of the energy storage grid-connected charging is the smaller value between the rated maximum power of the energy storage and the grid's acceptable capacity.

[0014] Preferably, in the three-level equipment operation, the wind turbine shutdown includes sequentially executing pneumatic braking, speed reduction, grid disconnection, and mechanical brake, with the pitch system locked to the feathering position; during emergency power supply in off-grid energy storage mode, power supply interruption is triggered when the energy storage charge state drops to the emergency power supply termination threshold.

[0015] Preferably, the dynamic correction control command includes: calculating wind speed deviation, energy storage state of charge deviation, and load power supply deviation; when any deviation exceeds the corresponding preset threshold, re-executing the wind speed judgment and command weight calculation, and issuing a correction command.

[0016] Preferably, the photovoltaic system only maintains power supply to its own monitoring module during typhoon conditions and does not participate in energy storage charging and discharging coordination.

[0017] Preferably, the typhoon data is obtained through a marine typhoon early warning system, including wind speed prediction, real-time wind speed, the range of the level 7 wind circle, and the range of the level 10 wind circle; the typhoon resistance parameters of the wind turbines include safe wind speed thresholds and shutdown wind speed thresholds.

[0018] 10. A coordinated control system for equipment safety and core load power supply in typhoon-resistant mode of an offshore wind, solar, and energy storage system, characterized in that it is used to implement the coordinated control method for equipment safety and core load power supply in typhoon-resistant mode of an offshore wind, solar, and energy storage system as described in any one of claims 1-9, comprising: The typhoon data analysis layer is used to connect with the marine typhoon early warning system, acquire typhoon data, and output the predicted time for each wind turbine to enter the wind circle; The field-level overall planning and judgment layer is used to receive wind turbine typhoon resistance parameters, energy storage charge status, and emergency load power data, and to perform wind speed judgment, command weight calculation, and control command issuance. The single-unit action execution layer is used to receive field-level commands and execute wind turbine yaw, load reduction, and shutdown actions, energy storage grid-connected charging and off-grid emergency power supply actions, as well as photovoltaic power curtailment actions.

[0019] Compared with existing technologies, this invention has the following advantages: This invention provides a method for coordinated control of equipment safety and core load power supply in the typhoon-resistant mode of an offshore wind-solar-storage system. It constructs a three-level wind speed interval judgment mechanism, classifying judgments based on wind speed forecasts and real-time wind speeds. In the first level interval, energy storage pre-charging and yaw deployment are executed in advance; in the second level interval, load reduction commands are issued through weighted calculation of wind ring weight, energy storage state of charge, and emergency load power; and in the third level interval, shutdown and off-grid emergency power supply are executed. This achieves gradual control from normal operation to complete shutdown, avoiding premature overdraft of energy storage or excessive defense by wind turbines. Through multi-dimensional weighted calculation of wind ring weight, energy storage state of charge, and emergency load power, the order of command issuance is determined by the command weight, solving the defect of disordered command issuance when multiple wind turbines are triggered simultaneously, ensuring that high-risk wind turbines receive control resources first. By collecting actual operating data and comparing the deviation with preset target values, wind speed judgment and command weight calculation are re-executed and correction commands are issued when the deviation exceeds the limit, forming a closed-loop control that ensures the system maintains a balance between equipment safety and core load power supply during dynamic typhoon changes. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of a method for coordinated control of equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind, solar and energy storage system according to the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Definitions of abbreviations and key terms: PCS: Power Conversion System, an energy storage converter that executes the "fully charged standby / emergency discharge" command for energy storage, enabling seamless off-grid / grid-connected switching. EMS: Energy Management System, which coordinates typhoon warning data, wind turbine parameters, energy storage SOC, and load demand at the field level, and executes command weighting calculations and distribution. SCADA (Supervisory Control and Data Acquisition) is a data acquisition and monitoring system that collects real-time data on required wind speed, wind radius, energy storage SOC, and emergency load power, supporting three-level judgment of typhoon response commands. Marine-TWS: Marine Typhoon Warning System, providing necessary data such as wind speed forecasts and wind circle ranges. TSL: Typhoon Safety Level, which includes the required core parameters such as safe wind speed threshold, shutdown wind speed threshold, and extreme wind speed threshold. MEL: Marine Emergency Load, defined as a Class I load (pitch control, fire fighting, and flood prevention equipment) according to GB50052-2009. SOC: State of Charge, the core control indicator for energy storage devices, including fully charged standby and emergency discharge. IEC 61850: International Electrotechnical Commission 61850, a communication standard for power system automation, supports real-time data interaction between Marine-TWS and EMS, ensuring command issuance latency ≤10ms. CWW: Cyclone Wind Weight, a key factor in the overall weighting of typhoon directives, reflecting the priority of the wind turbine's location within its wind zone. Wind Grid-SOC Coordination Weighting: The core mechanism for comprehensive command weighting, which combines wind turbine typhoon resistance parameters and energy storage SOC, is calculated as CWW (Wind Grid Priority) × 40% + SOC (Remaining Capacity Priority) × 30% + MEL (Load Urgency) × 30%, ensuring that high-risk wind turbines receive control commands first.

[0026] Photovoltaic emergency power supply restriction mode: Photovoltaics only maintain their own monitoring power supply. Under typhoon conditions, the photovoltaic system only activates the internal monitoring module and does not participate in energy storage charging and discharging to avoid the expansion of component failures caused by strong winds and rain.

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] See Figure 1 In one embodiment of the present invention, a method for coordinated control of equipment safety and core load power supply in the typhoon resistance mode of offshore wind, solar and energy storage system is provided, which solves the technical problems of disconnect between judgment logic and action, lack of coordination between wind circle range and energy storage charge status, and lack of weighting mechanism in command issuance that leads to lag in response of high-risk wind turbines in the existing offshore wind power typhoon resistance control.

[0029] S1 acquires typhoon data, wind turbine typhoon resistance parameters, energy storage charge status, photovoltaic operating status, and emergency load power data.

[0030] Collect typhoon data, wind turbine typhoon resistance parameters, energy storage charge status, photovoltaic operation status, and emergency load power data.

[0031] Typhoon data is acquired through the Marine-Typhoon Warning System (Marine-TWS), including wind speed forecasts, real-time wind speeds, and the range of winds at levels seven and ten. Wind turbine typhoon resistance parameters include safe wind speed thresholds and shutdown wind speed thresholds. Energy storage state of charge (SOC) is the percentage of the current remaining capacity of the energy storage battery relative to its rated capacity. Photovoltaic operating status includes the current output power of the photovoltaic modules and their grid connection status. Emergency load power is defined as Level 1 load power according to GB50052-2009, including the power supply requirements of pitch control systems, fire-fighting equipment, and flood prevention equipment.

[0032] Explanatory: The purpose of setting up multi-source data acquisition steps is to provide complete input parameters for subsequent three-level wind speed determination. When relying solely on real-time wind speed for typhoon-resistant control, the system cannot predict when the wind turbine will enter the danger zone, resulting in a lag in control actions. By introducing wind speed prediction and wind zone range data, the system can predict the typhoon risk level faced by the wind turbine in advance, providing a time margin for tiered control. At the same time, the introduction of energy storage state of charge and emergency load power provides decision-making basis on both the energy side and the load side for subsequent command weight calculation, enabling control commands to take into account both equipment safety and power supply assurance.

[0033] S2, based on the typhoon data and the wind turbine's typhoon resistance parameters, determine the wind speed range in which the current wind speed is located.

[0034] The wind speed range is divided into three ranges according to the safe wind speed threshold and the shutdown wind speed threshold: the first-level wind speed range, which is less than the safe wind speed threshold; the second-level wind speed range, which is greater than or equal to the safe wind speed threshold but less than the shutdown wind speed threshold; and the third-level wind speed range, which is greater than or equal to the shutdown wind speed threshold.

[0035] Specifically, the safe wind speed threshold is the wind speed value corresponding to the wind turbine entering the level 7 wind circle, and the shutdown wind speed threshold is the wind speed value corresponding to the wind turbine entering the level 10 wind circle. The Marine-Typhoon Warning System (Marine-TWS) provides real-time wind speed forecast data and cross-validates it with the real-time wind speed collected by the Supervisory Data Acquisition and Monitoring System (SCADA). Based on the wind speed forecast and real-time wind speed, the Emergency Management System (EMS) predicts the time node for each wind turbine to enter each wind circle within the future time window, thereby triggering the corresponding level judgment.

[0036] Explanatory: Dividing the wind speed range into three levels aims to establish a gradual control response mechanism. In traditional solutions, the system only triggers a single shutdown action when the wind speed reaches the shutdown threshold, lacking an intermediate transition link. This results in the energy storage system not being fully charged before the typhoon arrives, and the mechanical shock caused by the sudden shutdown of the wind turbine at high wind speeds being significant. By setting a two-level transition range between the safety threshold and the shutdown threshold, the system can initiate load reduction and energy storage charging operations in advance as the typhoon gradually approaches, achieving a smooth transition from normal operation to complete shutdown.

[0037] S3, when the wind speed range is a first-level wind speed range less than the safe wind speed threshold, execute the first-level equipment action: the wind turbine yaw system aligns with the wind direction, the energy storage is connected to the grid for charging and backup, and the photovoltaic system switches to the limited supply mode to maintain its own monitoring power supply.

[0038] The wind turbine's yaw system is aligned with the wind direction to maintain 80% of its rated power, thus avoiding unnecessary energy consumption. The power storage converter (PCS) maintains grid-connected mode, performs charging operations, and is fully charged for standby. The charging power is the smaller of the maximum rated power of the energy storage and the grid's acceptable capacity. ,in This is the maximum charging power of the energy storage converter; The photovoltaic system switches to a limited-supply mode, maintaining power supply only to its own monitoring modules, shutting down outdoor exposed components, and not participating in energy storage charging and discharging coordination. Periodically upload yaw angle, energy storage status of charge, and photovoltaic output data to EMS to ensure that the operation meets the requirements.

[0039] The triggering conditions for Level 1 judgment are: the Marine-TWS predicts that the wind turbine will not enter the level 7 wind circle within 24 hours, or the wind turbine is located outside the wind circle and more than 50km away from the level 10 wind circle.

[0040] Explanatory: The design intent of the Level 1 equipment actions is for the pre-deployment phase before the typhoon arrives. The wind turbine yaw system aligns with the wind direction in advance, reducing yaw adjustment time as wind speeds rise. The energy storage system utilizes the window before the typhoon arrives to fully charge, ensuring sufficient energy reserves for subsequent off-grid emergency power supply. The photovoltaic system switches to curtailment mode and shuts down exposed outdoor modules to prevent the expansion of photovoltaic module failures due to strong winds and heavy rain; maintaining only monitoring power supply ensures the observability of the photovoltaic system's status. During typhoon conditions, the photovoltaic system neither charges the energy storage system nor feeds power to the grid, remaining electrically isolated from the energy storage system. This is to prevent the thermal stress generated by the photovoltaic modules continuing to generate electricity under wind pressure and rain erosion during typhoon conditions from accelerating module aging and cracking.

[0041] S4. When the wind speed range is a secondary wind speed range that is greater than or equal to the safe wind speed threshold and less than the shutdown wind speed threshold, the secondary equipment action is executed: the wind turbine is reduced in load. The command weight of each wind turbine is calculated according to the wind ring weight, energy storage charge state and emergency load power, and the load reduction command is issued in the order of the command weight.

[0042] When the wind turbine is operating under reduced load, the maximum output is calculated according to the formula. Calculation, where This is the upper limit of output. This refers to the rated power of the fan. To cut off the wind speed (, For real-time wind speed, To cut in wind speed; The energy storage maintains a state of charge of no less than 80%, and the energy storage converter (PCS) remains in grid-connected standby mode. If the grid voltage fluctuation exceeds ±2%, it switches to off-grid standby mode. The command weight of each wind turbine is calculated based on the wind turbine weight, energy storage state of charge, and emergency load power, and load reduction commands are issued in descending order of the command weight.

[0043] The triggering conditions for Level 2 judgment are: the wind turbine enters the level 7 wind circle, and the Marine-Typhoon Warning System (Marine-TWS) predicts that it will enter the level 10 wind circle within 12 hours.

[0044] The instruction weight is calculated according to the following formula:

[0045] in, For the first Typhoon command weighting For the first The weight of the wind ring of a typhoon generator. For the first State of charge of typhoon storage Upper limit of state of charge State of charge limit , For the first Emergency load power of typhoon turbines This represents the total emergency load power of the entire site. These are the weighting coefficients.

[0046] Optional, , , , , .

[0047] Optionally, the wind circle weight is determined based on the wind circle range where the wind turbine is located: the wind circle weight when the wind turbine is in the predicted zone of level 10 wind circle. When the wind turbine is only in the level 7 wind circle, the wind circle weight is... .

[0048] Explanatory: The second-level wind speed range is a critical transitional phase as a typhoon approaches. The main challenge facing the system is that multiple wind turbines may simultaneously enter the risk area, but energy storage charging resources and emergency power supply capabilities are limited. Therefore, it is essential to determine the priority of each turbine in receiving control commands. The command weighting formula integrates three decision-making factors: wind circle weight reflects the environmental risk level of the turbine, energy storage state of charge reflects the adequacy of each unit's energy reserves for off-grid operation, and emergency load power reflects the urgency of power supply to the primary loads carried by the turbine. After weighting and combining these three factors, turbines located in the predicted ten-level wind circle, with low energy storage state of charge and high emergency load power will receive higher command weights, thus prioritizing the execution of load reduction and energy storage charging commands. The physical meaning of the linear load reduction formula is: the closer the real-time wind speed is to the cut-off wind speed, the lower the upper limit of turbine output. When the real-time wind speed reaches the cut-off wind speed, the upper limit of output drops to zero, achieving a smooth transition from rated output to zero output and avoiding the impact of a sudden drop in output on the power grid.

[0049] S5, when the wind speed range is a level 3 wind speed range that is greater than or equal to the shutdown wind speed threshold, execute level 3 equipment actions: wind turbine shutdown, energy storage switch to off-grid mode to perform emergency power supply, and photovoltaic power output is limited.

[0050] The wind turbine executes the shutdown procedure, sequentially performing pneumatic braking, speed reduction, grid disconnection, and mechanical brake engagement. The pitch system is locked in the feathering position to prevent damage from strong winds. The energy storage converter (PCS) switches to off-grid mode to perform emergency power supply and monitors the energy storage state of charge in real time. When the energy storage state of charge drops to 25%, a power supply interruption is triggered. The photovoltaic system further restricts power output by shutting down all non-essential modules and retaining only the core monitoring module.

[0051] The trigger condition for Level 3 judgment is: the wind turbine enters the level 10 wind circle.

[0052] Explanatory: The Category 3 wind speed range corresponds to the direct impact phase of the typhoon's core, where equipment safety risks reach their highest level. The turbine shutdown process is designed with a sequential execution order of pneumatic braking → speed reduction → grid disconnection → mechanical braking. This aims to: first, reduce the impeller speed pneumatically to avoid damage to power electronic devices from the inrush current generated by direct grid disconnection at high speeds; then, perform electrical grid disconnection after the speed drops to a safe range; and finally, achieve physical locking with mechanical braking, forming a triple protection system from pneumatic to electrical to mechanical. The energy storage system switches to off-grid mode for independent power supply during this phase because typhoons may cause grid failures or active disconnections, and off-grid operation ensures the continuity of power supply for critical emergency loads (pitch control, fire suppression, and flood prevention equipment). Setting a 25% emergency power supply termination threshold aims to balance the duration of power supply to core loads with a reserved safety margin for energy storage, preventing excessive discharge of energy storage that could prevent the system from restarting after recovery. The photovoltaic system further limits its output and shuts down unnecessary modules, retaining only core monitoring, in order to minimize the photovoltaic system's own energy consumption and failure risk, and concentrate system resources on ensuring power supply to core loads.

[0053] S6. After executing the device action, collect actual operating data and dynamically correct the control command based on the deviation between the actual operating data and the preset target value.

[0054] Collect actual operating parameters of the equipment, compare the deviations between the actual operating parameters and the command values, and calculate three types of deviations: Wind speed deviation ,in For real-time wind speed, This is the predicted wind speed value; State of charge deviation ; Load power supply deviation ; When the wind speed deviation exceeds 5%, the state of charge deviation exceeds 10%, or the load power supply deviation exceeds 5%, the EMS re-executes the wind speed judgment and command weight calculation, and issues a correction command. Dynamic correction measures include: increasing the energy storage charging current and adjusting the wind turbine load reduction range.

[0055] Furthermore, it automatically stores the data from each judgment, action, and correction to form an execution log for subsequent optimization.

[0056] Explanatory: The purpose of setting up a closed-loop feedback correction mechanism is to address the dynamic characteristics of rapidly fluctuating wind speeds during typhoon conditions. Typhoon paths and wind speeds can change significantly in a short period. If the open-loop control system fails to track the actual response after issuing commands, situations such as excessive deviations between predicted and actual wind speeds, and failure of energy storage charging and discharging to execute commands may occur, leading to control failure. By calculating three types of deviations and setting corresponding deviation thresholds, the EMS can automatically identify control deviations and re-trigger the judgment and command issuance process. Setting thresholds of 5% for wind speed deviation, 10% for state of charge deviation, and 5% for load power supply deviation is based on a trade-off between control accuracy and correction frequency: too small a deviation threshold will lead to frequent system corrections and command jitter; too large a deviation threshold will lead to accumulated control deviations and delayed response. Storing execution logs provides a data foundation for subsequent offline analysis and strategy optimization.

[0057] In one possible implementation, the technical effects and feasibility of the present invention are illustrated using a distributed architecture of a single turbine and energy storage system in an offshore wind farm as an example.

[0058] The test scenario simulates a typical typhoon passage. The offshore wind farm comprises multiple wind turbines, each equipped with a power storage converter (PCS) and a battery storage system, forming a distributed architecture of one turbine and one storage unit. A farm-level energy management system (EMS) and a supervisory control and data acquisition (SCADA) system are deployed, communicating with each individual turbine controller via a ring network of fiber optic cables. Communication protocols support Modbus-TCP, GOOSE, and IEC104. Typhoon data is sourced from the Marine-TWS system, providing wind speed forecasts, real-time wind speeds, and the radii of the 7-level and 10-level wind circles. The EMS interacts with Marine-TWS in real-time via the IEC61850 protocol, with a command issuance delay of no more than 10ms. In the test scenario, the typhoon gradually approaches the wind farm, with wind speeds increasing sequentially from the safe zone to the shutdown zone, simulating a complete three-level wind speed change process.

[0059] The first step is for EMS to obtain wind speed forecasts and wind circle range data through Marine-TWS, and to obtain real-time wind speed, energy storage SOC, photovoltaic status and emergency load power of each wind turbine through SCADA.

[0060] The second step is for EMS to perform wind speed judgment, and determine the wind speed range of each fan based on the comparison results of the real-time wind speed of each fan with the safety threshold and shutdown threshold.

[0061] The third step is for the EMS to issue corresponding equipment action commands based on the wind speed range: for the first-level range, yaw alignment and energy storage charging commands are issued; for the second-level range, the linear load reduction formula is executed first. Calculate the maximum output of each wind turbine, and then apply the command weighting formula. Calculate the command weight of each wind turbine and issue load reduction commands in descending order of weight; issue shutdown, off-grid emergency power supply and photovoltaic power restriction commands in the three-level interval.

[0062] The fourth step is that each individual machine action execution layer receives the instruction, executes the corresponding action, and uploads the execution status to the EMS via the ring network fiber optic cable.

[0063] The fifth step involves EMS collecting actual operational data and calculating wind speed deviation. State of charge deviation and load power supply deviation If any deviation exceeds the corresponding threshold, the wind speed judgment and weight calculation will be re-executed and a correction command will be issued. EMS automatically stores the judgment-action-correction data for each instance, forming an execution log.

[0064] Throughout the typhoon's passage, the system sequentially undergoes a complete control process across three wind speed ranges: In the first-level interval: the wind turbine yaw system is aligned with the wind direction, the energy storage system completes full charging within the time window before the typhoon arrives, and the photovoltaic system switches to a limited-supply mode. Actual measurement data shows that within the 24-hour window before typhoon landfall, the SOC of each energy storage system increased from its initial state to over 95%, providing sufficient energy reserves for subsequent off-grid emergency power supply.

[0065] Secondary range: Wind turbine output decreases smoothly according to a linear load reduction formula, avoiding the impact of a sudden drop in output on the power grid. In the command weight calculation, wind turbines in the tenth-level wind circle prediction zone are... The weight of the high wind circle, its comprehensive weight Significantly higher than wind turbines only in the seventh-level wind circle, ensuring that high-risk wind turbines receive load reduction and energy storage charging commands first. The energy storage system maintains a SOC of no less than 80% in the second-level range, and the PCS remains on standby connected to the grid, preparing for off-grid switching in the third-level range.

[0066] Level 3: The wind turbine shutdown process was executed sequentially, avoiding the inrush current from direct grid disconnection under high wind speeds. Upon detecting a grid anomaly, the energy storage PCS switched to off-grid mode, using a 25% emergency power supply termination threshold to ensure continuous power supply to pitch control, fire suppression, and flood prevention equipment during grid outages. Throughout the typhoon, the photovoltaic system maintained power only to its own monitoring modules, and no module failures occurred due to strong winds and heavy rain.

[0067] The closed-loop feedback correction mechanism is automatically triggered when typhoon wind speed changes rapidly: when the deviation between real-time wind speed and predicted wind speed exceeds 5%, the EMS re-executes the wind speed judgment and updates the load reduction command; when the deviation between the actual value and the commanded value of energy storage SOC exceeds 10%, the EMS adjusts the charging power; when the deviation between the actual power supply and the commanded power supply of emergency load exceeds 5%, the EMS optimizes the load allocation. Each correction record is stored in the execution log, forming a complete control backtracking data chain.

[0068] In another embodiment of the present invention, a coordinated control system for equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system is provided, comprising: The typhoon data parsing layer is used to connect to the Marine-TWS system to acquire typhoon data and output the predicted time for each wind turbine to enter the wind circle; the typhoon data includes wind speed prediction, real-time wind speed, the range of the level 7 wind circle, and the range of the level 10 wind circle. The field-level overall planning and judgment layer is used to receive wind turbine typhoon resistance parameters, energy storage charge status, and emergency load power data, and to perform wind speed judgment, command weight calculation, and control command issuance; the wind turbine typhoon resistance parameters include safe wind speed threshold and shutdown wind speed threshold. The single-unit action execution layer is used to receive field-level commands and execute wind turbine yaw, load reduction, and shutdown actions, energy storage grid-connected charging and off-grid emergency power supply actions, as well as photovoltaic power curtailment actions.

[0069] Specifically, the typhoon data analysis layer is connected to the field-level overall planning and judgment layer via a ring network optical fiber, and the field-level overall planning and judgment layer is connected to the single-machine action execution layer via a ring network optical fiber. The communication protocol supports Modbus-TCP, GOOSE and IEC104 protocols to ensure that the end-to-end delay of the command does not exceed 10ms.

[0070] Specifically, the single-unit action execution layer includes a power storage converter (PCS), a photovoltaic emergency module, and a local controller for each wind turbine. The local controller receives field-level commands and executes yaw, load reduction, or shutdown actions; the power storage converter performs grid-connected charging, grid-connected standby, or off-grid emergency power supply; the photovoltaic emergency module executes a limited-supply mode, maintaining power supply to its own monitoring module or shutting down unnecessary modules. The single-unit action execution layer periodically uploads its execution status to the EMS.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0072] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A method for coordinated control of equipment safety and core load power supply in an offshore wind-solar-storage system under typhoon resistance mode, characterized in that, Includes the following steps: Acquire typhoon data, wind turbine typhoon resistance parameters, energy storage status of charge, photovoltaic operating status, and emergency load power data; Based on the typhoon data and the wind turbine's typhoon resistance parameters, wind speed is determined to identify the current wind speed range. When the wind speed range is a level one wind speed range that is less than the safe wind speed threshold, the level one equipment action is executed: the wind turbine yaw system is aligned with the wind direction, the energy storage is connected to the grid for charging and backup, and the photovoltaic system is switched to the limited supply mode to maintain its own monitoring power supply. When the wind speed range is a secondary wind speed range that is greater than or equal to the safe wind speed threshold and less than the shutdown wind speed threshold, the secondary equipment action is executed: the wind turbine is reduced in load, the command weight of each wind turbine is calculated according to the wind ring weight, energy storage charge status and emergency load power, and the load reduction command is issued in the order of the command weight. When the wind speed range is a level 3 wind speed range that is greater than or equal to the shutdown wind speed threshold, level 3 equipment actions are executed: the wind turbine is shut down, the energy storage is switched to off-grid mode to perform emergency power supply, and the photovoltaic output is limited. After the device performs the action, actual operating data is collected, and the control command is dynamically corrected based on the deviation between the actual operating data and the preset target value.

2. The method for coordinated control of equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system according to claim 1, characterized in that, The upper limit of the output of the wind turbine during unloaded operation is calculated according to the following formula: in, The upper limit of output, This refers to the rated power of the fan. To cut off the wind speed, For real-time wind speed, To determine the cut-in wind speed.

3. The method for coordinated control of equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system according to claim 1, characterized in that, The instruction weight is calculated according to the following formula: in, For the first Typhoon command weighting For the first The weight of the wind ring of a typhoon generator. For the first State of charge of typhoon storage Upper limit of state of charge State of charge limit , For the first Emergency load power of typhoon turbines This represents the total emergency load power of the entire site. These are the weighting coefficients.

4. The method for coordinated control of equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system according to claim 3, characterized in that, The wind circle weight is determined based on the wind circle range where the wind turbine is located: the wind circle weight in the prediction zone of level 10 wind circle is higher than that in the wind circle of level 7 wind circle.

5. The method for coordinated control of equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system according to claim 1, characterized in that, During the operation of the primary equipment, the charging power of the energy storage grid-connected charging is the smaller value between the rated maximum power of the energy storage and the grid's acceptable capacity.

6. The method for coordinated control of equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system according to claim 1, characterized in that, In the three-level equipment operation, the wind turbine shutdown includes sequentially executing pneumatic braking, speed reduction, grid disconnection, and mechanical brake, with the pitch system locked to the feathering position; during emergency power supply in off-grid energy storage mode, power supply interruption is triggered when the energy storage charge state drops to the emergency power supply termination threshold.

7. The method for coordinated control of equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system according to claim 1, characterized in that, The dynamic correction control command includes: calculating wind speed deviation, energy storage state of charge deviation, and load power supply deviation. When any deviation exceeds the corresponding preset threshold, the wind speed judgment and command weight calculation are re-executed, and a correction command is issued.

8. The method for coordinated control of equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system according to claim 1, characterized in that, The photovoltaic system only maintains power supply to its own monitoring module during typhoon conditions and does not participate in energy storage charging and discharging coordination.

9. The method for coordinated control of equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system according to claim 1, characterized in that, The typhoon data is obtained through the marine typhoon early warning system, including wind speed prediction, real-time wind speed, the range of the level 7 wind circle, and the range of the level 10 wind circle; the typhoon resistance parameters of the wind turbines include safe wind speed thresholds and shutdown wind speed thresholds.

10. A coordinated control system for equipment safety and core load power supply in a typhoon-resistant mode for an offshore wind-solar-storage system, characterized in that, A method for coordinated control of equipment safety and core load power supply in typhoon-resistant mode of an offshore wind-solar-storage system, as described in any one of claims 1-9, includes: The typhoon data analysis layer is used to connect with the marine typhoon early warning system, acquire typhoon data, and output the predicted time for each wind turbine to enter the wind circle; The field-level overall planning and judgment layer is used to receive wind turbine typhoon resistance parameters, energy storage charge status, and emergency load power data, and to perform wind speed judgment, command weight calculation, and control command issuance. The single-unit action execution layer is used to receive field-level commands and execute wind turbine yaw, load reduction, and shutdown actions, energy storage grid-connected charging and off-grid emergency power supply actions, as well as photovoltaic power curtailment actions.

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