A hydropower station powerhouse collaborative control method and system based on vibration link decoupling

Abstract

Embodiments of the present disclosure provide a hydropower plant collaborative control method and system based on vibration link decoupling. The method comprises: dividing a vibration process into three links of excitation source, structure transmission and plant response; collecting vibration data in real time and setting multi-target threshold values of structure safety, equipment operation, personnel comfort and the like; establishing a mapping relationship between an operation parameter vector composed of unit active power, effective water head, tail water level and unit combination mode and plant vibration response; identifying and dynamically updating a region causing vibration exceeding the standard in the operation parameter space to form a dynamic vibration avoidance zone; collaboratively executing operation mode adjustment and / or structure response adjustment when the unit enters the vibration avoidance zone; and dynamically closing loop and correcting the control strategy according to the feedback monitoring result. Embodiments of the present disclosure realize decoupling collaborative control of the vibration link, can adapt to working condition changes and effectively reduce the plant vibration level.

Description

Technical Field

[0001] The embodiments disclosed herein belong to the field of hydropower station control technology, specifically relating to a hydropower station powerhouse collaborative control method and system based on vibration link decoupling. Background Technology

[0002] With the continuous increase in installed capacity and the increasing complexity of operating conditions of hydropower stations, vibration problems in hydropower station powerhouses are gradually becoming more frequent at different operating stages and load ranges. Especially under conditions of partial load operation, multi-unit combined operation, or frequent changes in head, significant vibrations may occur in the powerhouse structure, auxiliary buildings, and office areas, which not only affect the working environment of personnel but may also have adverse effects on structural durability and equipment operational stability.

[0003] Existing control measures for vibration problems in hydropower plant buildings mainly focus on the following two aspects: on the one hand, optimizing and adjusting the unit operating parameters to avoid known high vibration operating ranges as much as possible; on the other hand, taking measures to strengthen, isolate, or reduce vibration of the plant structure to reduce the structure's response level to vibration excitation.

[0004] However, in practical engineering applications, the above methods still have significant limitations. First, operating parameter adjustments and structural vibration reduction measures are often implemented as independent means, lacking a systematic consideration of the entire process from vibration generation to structural response, making it difficult to effectively control key links in the vibration transmission process. Second, existing operation control strategies are mostly based on experience or static operating condition divisions, making it difficult to adapt to dynamic changes in vibration characteristics caused by variations in head, tailrace level, and unit combination. Third, relying solely on structural reinforcement or vibration reduction measures often requires high engineering investment, and retrofitting existing powerhouses is difficult. From an engineering mechanism perspective, the vibration of a hydropower station powerhouse is not caused by a single excitation or a single structural factor, but rather by the generation excitation being transmitted and amplified step-by-step through multiple structural paths, including the tailrace pipe, turbine pit structure, powerhouse foundation, and connecting components. Therefore, if the vibration transmission chain cannot be effectively decoupled, it is difficult to fundamentally reduce the overall vibration level of the powerhouse through only local operation adjustments or local structural treatments. Summary of the Invention

[0005] The embodiments disclosed herein aim to at least solve one of the technical problems existing in the prior art, and provide a method and system for collaborative control of hydropower plant buildings based on vibration link decoupling.

[0006] One aspect of this disclosure provides a collaborative control method for a hydropower plant building based on vibration link decoupling, the method comprising: The vibration process of the hydropower plant building is divided into the excitation source link, the structural transmission link, and the power plant response link. Real-time monitoring of factory vibration response and setting multi-target vibration response thresholds; Establish an operating parameter vector consisting of unit active power, effective head, tailrace water level, and unit combination mode, and construct a mapping relationship between the operating parameter vector and the powerhouse vibration response; Within the operating parameter space, the operating areas that cause the factory vibration response to exceed the vibration response threshold are identified and dynamically updated to form a dynamic vibration isolation zone. When the unit is operating in the dynamic vibration isolation zone, vibration link decoupling control is performed, including operation mode adjustment and / or structural response adjustment; Based on the feedback monitoring results of plant vibration, the vibration link decoupling control strategy is dynamically modified.

[0007] Furthermore, the excitation source link is caused by changes in the unit's operating state; the structural transmission link includes the tailrace pipe support structure, the turbine pit structure, and the powerhouse foundation and its connecting components; the powerhouse response link includes the main powerhouse structure and auxiliary buildings; The vibration response of the plant is a function of the product of the excitation source link, the structural transmission link, and the plant response link.

[0008] Furthermore, the vibration response threshold includes at least a structural safety threshold, an equipment operation threshold, and a personnel comfort threshold.

[0009] Furthermore, the adjustment of the operating mode aims to minimize the plant vibration response and is constrained by the feasible operating range of the unit.

[0010] Furthermore, the structural response adjustment is achieved by changing the transmission characteristics of the structural transmission link, and satisfies the following equation within the target frequency band:

[0011] In the formula, For the adjusted structure transfer operator, For the structure transfer operator before adjustment, The frequency is within the target frequency band.

[0012] Furthermore, when the Euclidean distance between the operating parameter vector and the dynamic vibration damping zone is less than a preset distance threshold, the unit is determined to be in the dynamic vibration damping zone.

[0013] Furthermore, the dynamic vibration damping zone is dynamically updated based on the head, tailwater level, and unit combination method; The vibration link decoupling control strategy is adaptively adjusted based on the updated dynamic vibration damping zone.

[0014] Another aspect of this disclosure provides a hydropower plant collaborative control system based on vibration link decoupling, the system comprising: The process division module is used to divide the vibration process of the hydropower plant into the excitation source link, the structural transmission link, and the plant response link. The vibration monitoring module is used to monitor the vibration response of the factory in real time and set multi-target vibration response thresholds; The mapping construction module is used to establish an operating parameter vector consisting of the unit's active power, effective head, tailwater level, and unit combination mode, and to construct the mapping relationship between the operating parameter vector and the plant vibration response. The area identification module is used to identify and dynamically update the operating areas that cause the factory vibration response to exceed the vibration response threshold within the operating parameter space, thereby forming a dynamic vibration isolation zone. The decoupling control module is used to perform vibration link decoupling control when the unit is in the dynamic vibration isolation zone, including operating mode adjustment and / or structural response adjustment. The strategy correction module is used to dynamically correct the strategy of the vibration link decoupling control based on the feedback monitoring results of the plant vibration.

[0015] Another aspect of this disclosure provides an electronic device, comprising: At least one processor; and, A memory communicatively connected to the at least one processor is used to store one or more programs, which, when executed by the at least one processor, enable the at least one processor to implement the hydropower plant collaborative control method based on vibration link decoupling described above.

[0016] Another aspect of this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described hydropower plant collaborative control method based on vibration link decoupling.

[0017] This disclosure discloses a method and system for coordinated control of a hydropower plant building based on vibration link decoupling. By performing link-level decoupling analysis on the entire process of vibration excitation, structural transmission, and plant response in the hydropower plant building, it coordinates and dynamically controls the unit's vibration isolation operation control and structural response adjustment measures, avoiding the limitations of relying solely on single operation optimization or structural vibration reduction measures. By constructing a dynamic vibration isolation zone and implementing closed-loop feedback correction, the control strategy can adapt to changes in multiple operating conditions, effectively reducing the plant's vibration response level while ensuring the safe and stable operation of the unit. It has the advantages of strong control targeting, good engineering applicability, and high implementation flexibility. Attached Figure Description

[0018] Figure 1This is a flowchart illustrating a collaborative control method for hydropower plant buildings based on vibration link decoupling, according to an embodiment of this disclosure. Figure 2 This is a schematic diagram of the dynamic vibration damping zone in the operating parameter space of another embodiment of the present disclosure; Figure 3 This is a schematic diagram comparing the vibration spectrum of the office floor slab before and after collaborative control according to another embodiment of this disclosure; Figure 4 This is a schematic diagram of the structure of a hydropower plant collaborative control system based on vibration link decoupling, according to another embodiment of this disclosure. Figure 5 This is a schematic diagram of the structure of an electronic device according to another embodiment of the present disclosure. Detailed Implementation

[0019] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0020] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0021] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0022] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as the second component without departing from the teachings of this disclosure. As used in this disclosure, the term "and / or" includes all combinations of any and more of the associated listed items.

[0023] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing this disclosure, and therefore cannot be used to limit the scope of protection of this disclosure.

[0024] like Figure 1 As shown, one embodiment of this disclosure provides a collaborative control method for a hydropower plant based on vibration link decoupling, the method comprising: Step S1: Divide the vibration process of the hydropower plant into the excitation source link, the structural transmission link, and the plant response link.

[0025] Specifically, the excitation source link is caused by changes in the unit's operating conditions, mainly including hydraulic excitation and unit dynamic excitation. The excitation intensity of this link can be characterized by operating parameters, which at least include: unit active power (load) and its rate of change, guide vane opening and regulation status, effective head, and tailrace level.

[0026] The structural transmission link consists of a multi-level structural path through which vibration is transmitted from the excitation source to the main structure of the plant. Specifically, it includes the tailrace pipe support structure, the pit structure (such as the pit lining and pit walls), the plant foundation (such as the bottom slab and foundation plate), and connecting components (such as connecting corridors and support beams). The vibration transmission characteristics of this link can be described and characterized by the equivalent stiffness, equivalent damping, and connection method of each transmission node.

[0027] The plant response chain consists of structural units that receive and ultimately exhibit vibration responses, specifically including the main plant structure (such as columns, floors, and walls) and auxiliary buildings (such as office areas and control rooms). This chain is used to characterize the amplification or attenuation characteristics of different structural parts to input vibrations and is the ultimate target of vibration control.

[0028] By employing the above-described hierarchical modeling, the complex vibration process of the factory building is decomposed into three relatively independent yet interconnected stages: excitation input, transmission path, and final response. This achieves a link-level structured description of the vibration process. From a control mechanism perspective, the overall vibration response of the factory building... It can be approximated as the input of the excitation source link. Transmission operators of structural transmission links and the response characteristics of the factory response link The product function, i.e. This division allows for subsequent targeted adjustments to the operational mode (applying to the input of the excitation source link). ) and / or structural response modulation (acting on the transfer operator) This provides a clear analytical framework and control object for achieving decoupled and coordinated control of vibration links.

[0029] Step S2: Monitor the vibration response of the plant in real time and set multi-target vibration response thresholds.

[0030] Specifically, vibration monitoring devices (such as accelerometers and velocity sensors) are deployed at key locations in the factory structure to form a monitoring network covering the vibration transmission path and sensitive areas. Key monitoring locations typically include: the side walls of the pit structure to sense near-field vibrations of the excitation source; the factory foundation and key load-bearing structures to sense vibrations along the transmission chain; and the main factory structure (such as floor slabs and columns) and frequently used auxiliary building areas (such as office floor slabs) to sense the final response.

[0031] Vibration data from the aforementioned monitoring points is collected in real time. The signals typically include time-domain waveforms and a frequency-domain spectrum obtained through processing (e.g., Fast Fourier Transform). Vibration response indicators can be characterized by the amplitude, root mean square (RMS), or weighted energy values ​​within a specific frequency band of acceleration, velocity, or displacement. For example, a frequency band-weighted vibration index can be used.

[0032] In the formula, For frequency, , These are the frequency band end values, A weighting function to reflect the impact of different frequencies on human comfort or structural hazards. For frequency The amplitude of the vibration spectrum at that location.

[0033] According to different control objectives, a multi-dimensional vibration response threshold system is set, which includes at least the following three categories: (1) Structural safety threshold, which is set based on the design standards of the factory structure, material fatigue characteristics and long-term safe operation requirements, and is used to limit the vibration amplitude or vibration energy of key components of the factory (such as foundation, load-bearing walls, main beams) to prevent structural damage or cumulative fatigue failure; (2) Personnel comfort threshold, which is set based on the human body's perception and tolerance standards for vibration (such as ISO 2631 series standards), and is mainly used to limit the vibration acceleration level of long-term working areas such as office areas and control rooms in the factory to ensure a comfortable working environment; (3) Equipment operation threshold, which is set based on the sensitivity of precision equipment, instruments or auxiliary equipment in the factory to the vibration environment, and is used to ensure the normal operation accuracy and reliability of these equipment.

[0034] The aforementioned thresholds can be configured differently based on the function and importance of different areas of the factory. For example, the office area focuses on personnel comfort thresholds, the area where precision equipment is installed focuses on equipment operation thresholds, while critical load-bearing structures must simultaneously meet structural safety thresholds. Thresholds can be single limits or spectral curves varying with frequency. All set thresholds constitute the allowable upper limit of vibration response under the corresponding operating conditions. .

[0035] By acquiring the actual vibration status of the plant through real-time monitoring and combining it with a multi-objective threshold system, a quantitative basis and criteria are provided for subsequent judgments on whether the vibration exceeds the standard, identification of operating areas that need vibration avoidance, and evaluation of control effectiveness.

[0036] Step S3: Establish an operating parameter vector consisting of the unit's active power, effective head, tailwater level, and unit combination mode, and construct a mapping relationship between the operating parameter vector and the plant vibration response.

[0037] Specifically, firstly, key parameters reflecting the current operating status of the units are collected in real time from the Supervisory Control and Data Acquisition (SCADA) system of the hydropower station, and a multi-dimensional operating parameter vector is constructed. Its general form is:

[0038] In the formula, The active power of the unit represents the unit's output load. Effective head, characterizing the energy potential difference of the flow through the turbine; The tailwater level, together with the effective head, influences the flow regime and potential sources of hydraulic excitation. This refers to the unit combination method, using coded forms (such as 0,1 sequences, identifiers) to represent the number of units currently in operation, their serial numbers, and possible load distribution patterns, used to describe the overall operating status when multiple units are operating in parallel. Operating parameter vector As time changes, it forms a multi-dimensional operating parameter space, with each moment (or operating condition) corresponding to a point in the space.

[0039] Subsequently, a mapping relationship between operating parameters and vibration response was constructed. Based on historical operating data, real-time monitoring data, and necessary test data, a correlation model between the operating parameter space and the vibration response at key locations in the powerhouse was established through data analysis and modeling methods. Operating parameter vector data covering various operating conditions (different loads, heads, and unit combinations) and their corresponding powerhouse vibration response monitoring data at the same time were collected to form a sample dataset.

[0040] Mapping relationships can be established using a combination of data-driven or mechanistic models, including but not limited to: (1) statistical regression models, which fit an approximate functional relationship between vibration response and operating parameters through multivariate nonlinear regression analysis; (2) machine learning models, which utilize algorithms such as Support Vector Machine (SVM), neural networks (e.g., backpropagation neural networks, recurrent neural networks), or Gaussian process regression; and (3) transfer function models, which combine the simplified mechanism of hydraulic-mechanical-structural coupling to establish a transfer path model from changes in operating parameters to vibration excitation and then to structural response. The mapping relationship is expressed as a function: This function is designed to describe the operation of the unit when it is running in parameter vector mode. The model represents the expected vibration response level at key locations within the plant under the specified operating conditions. As new operational-vibration data accumulates, the mapping relationship can be dynamically updated, allowing for online or offline retraining and correction of the model to improve its prediction accuracy and adaptability.

[0041] The mapping relationship established in this step is a key bridge connecting the unit's operating status with the plant's vibration effect, providing a computational basis for the next step of intelligently identifying and locating high-vibration-risk areas (dynamic vibration isolation zones) in the operating parameter space.

[0042] Step S4: Within the operating parameter space, identify and dynamically update the operating areas that cause the plant vibration response to exceed the vibration response threshold, thus forming a dynamic vibration isolation zone.

[0043] Specifically, the running parameter vector established in step S3 is used. Vibration response of the factory building Mapping relationship between , in the The analysis involves traversing or sampling within a parameter space comprised of various parameters. For a candidate operating condition point within the parameter space... Or its neighborhood, calculate the corresponding predicted vibration response through the mapping relationship. .

[0044] The predicted vibration response The multi-objective vibration response threshold set in step S2 By comparing, the vibration response will be predicted. All running parameter vectors exceeding any relevant threshold The set of [elements] is defined as the dynamic vibration damping zone. This area In the parameter space, it is represented as one or more continuous irregular subspaces.

[0045] Dynamic vibration damping zone It is not fixed; its range, shape, and location will dynamically update and adjust according to changes in external conditions and the power plant's own state. Update methods include: retraining the mapping model using the latest accumulated data according to a preset time period (e.g., daily, weekly). And re-identify the vibration avoidance zone Updates are triggered when critical operating conditions change significantly, such as head. or tailwater level Significant and continuous changes have occurred in the unit combination methods. Changes occur (such as the addition or removal of units), and known changes occur in the structural characteristics of the plant due to maintenance, reinforcement, etc.; based on the deviation between the actual vibration and the control effect monitored in the feedback correction process, the mapping model and vibration isolation zone are corrected.

[0046] The update is essentially based on the latest data to adjust the mapping relationship. Through relearning and optimization, by incorporating new operation-vibration data pairs, the mapping model can more accurately reflect the vibration characteristics under current conditions, thereby generating a more realistic dynamic vibration damping zone.

[0047] This step visualizes the abstract problem of excessive vibration as identifiable and avoidable "areas" within the operating parameter space. Through a dynamic update mechanism, it ensures that the vibration isolation zone can adapt to changes in the actual operating conditions of the power plant (such as seasonal changes in head, unit maintenance and commissioning, etc.), thereby improving the accuracy and adaptability of vibration isolation control.

[0048] Step S5: When the unit is in the dynamic vibration isolation zone, perform vibration link decoupling control, including operating mode adjustment and / or structural response adjustment.

[0049] Specifically, the current running parameter vector is obtained in real time. Calculate the current running point With dynamic vibration damping zone The "distance" or positional relationship between them. For example, defining a distance function. This distance can be Euclidean distance, Mahalanobis distance, or distance in other metric spaces, when At that time, it was determined that the unit's operating status was in the dynamic vibration isolation zone, among which This is the preset distance threshold.

[0050] Based on the preset distance threshold Based on different levels of execution strategy, determine and trigger corresponding decoupling controls: when When the unit's operating status is determined to be close to the boundary of the vibration isolation zone, a preventive adjustment strategy is triggered; when When the unit's operating status is determined to have entered the vibration isolation zone, active vibration isolation or rapid mitigation strategies are triggered.

[0051] When decoupling control is triggered, the operating mode is adjusted first by changing the input of the excitation source link, i.e., the operating parameter vector. This moves the operating point out of the vibration damping zone. Or reduce the vibration level; specific strategies may include: When the operating condition approaches the boundary of the vibration isolation zone, the unit load change rate is actively limited to ensure a smooth transition of operating parameters and avoid rapid passage or approach to high vibration areas. When the operation enters the vibration damping zone and cannot exit immediately (e.g., due to scheduling requirements), a rapid crossing strategy is executed. Through brief parameter adjustments, the dwell time in the high vibration zone is shortened, reducing the cumulative impact of vibration. For multi-unit power plants, the start / stop status or load distribution of each unit is adjusted according to the distribution of the dynamic vibration isolation zone (i.e., the unit combination method is changed). This ensures that the total output of the entire plant meets the requirements, while the operating point of each unit avoids its own vibration isolation zone, or the operating point of the entire system is removed from the vibration isolation zone.

[0052] The operation mode adjustment aims to minimize the plant vibration response, and is optimized under the constraints of unit operation feasibility and safety (such as output range, ramp rate limit, grid dispatch instructions, etc.), as shown in the following equation:

[0053] In the formula, For the rate of change of operating parameters, This is the set of constraints for unit operation.

[0054] During or after implementing operational mode adjustments, structural response adjustment measures can be activated as needed to actively or semi-actively intervene at key nodes in the structural transmission chain (such as the pit-foundation connection, key support points, etc.) to alter vibration transmission characteristics and achieve decoupling between links. Specific adjustment measures may include: By using tuned mass dampers (TMDs) and viscous dampers at key locations, the effective damping ratio of the structure in a specific excitation frequency band can be increased, thereby attenuating vibrations. At the nodes of the vibration transmission path, the flexible connectors (such as rubber pads or spring isolators) are adjusted to change the equivalent stiffness of the connection point, thereby changing or blocking the vibration transmission of a specific frequency band. By setting up active or passive vibration isolation systems along certain transmission paths, the vibration energy transmitted from the excitation source link to the plant response link can be directly reduced.

[0055] The goal of structural tuning is to enable the tuned structural transfer operator to function within the expected target frequency band. The modulus is smaller than that of the structure operator before adjustment. The model, that is .

[0056] This step involves proactively and collaboratively altering the excitation input (operation mode adjustment) and / or transmission path characteristics (structural response adjustment) to decouple and intervene at both the input source and transmission path of the vibration chain, significantly reducing or even directly avoiding the high vibration response of the plant.

[0057] Step S6: Based on the feedback monitoring results of the plant vibration, dynamically modify the vibration link decoupling control strategy.

[0058] Specifically, after implementing decoupling control, the actual vibration response at key locations in the plant is monitored in real time. The actual vibration response With preset multi-objective vibration response threshold The effects of decoupling control are evaluated by comparing the two, and the operating parameters are adjusted based on the deviation between them. The correction is made as shown in the following formula:

[0059] In the formula, The next step of operation control parameters is based on the vibration deviation correction. For the first The set values ​​of the step's operation control parameters. This is the parameter correction function. Ultimately, a closed-loop control mechanism is formed, where operational control and structural control work in synergy.

[0060] The following describes the specific application process of the vibration isolation operation and structural collaborative control method of a hydropower plant based on vibration link decoupling, using a mixed-flow hydropower unit as an example.

[0061] A mixed-flow hydropower station has four generating units, each with a capacity of 250MW and a rated speed of 150r / min. The powerhouse is a reinforced concrete frame structure, with the turbine pit structure and powerhouse foundation cast integrally. An office area is located on one side of the powerhouse, connected to the main powerhouse via a corridor. Under parallel operation of multiple units, significant low-frequency vibrations occurred on the second-floor slab of the office area within certain load ranges, affecting the comfort of the staff.

[0062] An accelerometer is placed at the following locations, with a sampling frequency of 200Hz: Measurement point a: Side wall of the pit structure Measurement point b: Factory foundation Measurement point c: Center of the second floor slab in the office area According to the project requirements, the vibration control thresholds are set as follows: Human comfort threshold: ≤0.015m / s 2 ; Structural control reference threshold: ≤0.03m / s 2 .

[0063] Further selection of unit active power Effective head Tailwater level and the number of parallel generating units Constructing the runtime parameter vector The schematic diagram of the dynamic vibration damping zone in the operating parameter space is as follows: Figure 2 As shown.

[0064] Based on statistical analysis of historical operating data, it was found that when two units are operating in parallel, the load of a single unit is in the range of 170MW to 200MW, and the effective head is about 78m to 82m, the root mean square value of the acceleration at measuring point c on the office floor stably exceeds the comfort threshold.

[0065] Therefore, the above combination of operating parameters is defined as the dynamic vibration damping zone:

[0066] When the unit's operating status approaches the boundary of the vibration isolation zone (the load distance to the vibration isolation zone is less than 10MW), the system automatically triggers the operation mode adjustment strategy: 1. Load smoothing adjustment: Limit the load change rate to... ≤5MW / min; 2. Rapidly cross the vibration isolation zone: When the load inevitably enters the vibration isolation zone, the unit load is quickly increased to above 210MW to reduce the time the unit stays in the vibration isolation zone; 3. Adjustment of unit combination mode: Under the premise of meeting the grid dispatch requirements, the number of parallel operating units will be adjusted from 2 to 3, so that the load of a single unit avoids the vibration isolation zone.

[0067] Furthermore, to address the vibration transmission characteristics at the connecting corridor structure, structural response adjustment measures were implemented at the corridor nodes in the office area. These measures included: adding damping devices to key connecting components of the corridor to increase the equivalent structural damping ratio from 3% to approximately 6%; and making the connecting nodes of the corridor more flexible to reduce vibration transmission efficiency in the low-frequency band (1.5Hz~3.0Hz). After structural adjustment, the following conditions were met within the target frequency band:

[0068] Finally, after the coordinated implementation of operational mode adjustments and structural response regulation, continuous monitoring of the vibration of the office area floor slab was conducted. The results showed that the root mean square value of the acceleration at measuring point c decreased from 0.021 m / s². 2 Reduced to 0.011 m / s 2 Furthermore, the vibration response remains consistently below the human comfort threshold. In addition, when the head and operating conditions change, the system automatically adjusts its operating strategy based on monitoring results to maintain vibration-damping operation.

[0069] The vibration spectrum of the office floor slab before and after collaborative control was further plotted, such as... Figure 3 As shown, a comparison of the vibration spectrum of the measuring points on the second floor of the office area before and after the implementation of coordinated control reveals that before coordinated control, the vibration response had a significant main peak at approximately 2.4 Hz, with a large amplitude of the dominant frequency component. After implementing vibration isolation operation and structural coordinated control based on vibration link decoupling, the position of this dominant frequency remained unchanged, but the amplitude of the vibration response in the corresponding frequency band decreased significantly, and the overall spectral energy decreased significantly. This indicates that the synergistic effect of adjusting the operation mode and regulating the structural response effectively weakened the amplification effect of vibration in the dominant frequency band, thereby achieving effective control of the factory's vibration response.

[0070] This embodiment demonstrates that the hydropower plant building collaborative control method based on vibration link decoupling described in this disclosure can effectively reduce the vibration response of the power plant and improve the operating environment of the power plant under the condition of multiple units operating in parallel. This is achieved through the coordinated implementation of dynamic vibration isolation zone identification, operation mode adjustment and structural response regulation, and has good engineering applicability.

[0071] This disclosure discloses a hydropower plant powerhouse collaborative control method based on vibration link decoupling. By performing link-level decoupling analysis on the entire process of vibration excitation, structural transmission, and powerhouse response in the hydropower plant powerhouse, it collaboratively designs and dynamically controls the unit's vibration isolation operation control and structural response adjustment measures, avoiding the limitations of relying solely on single operation optimization or structural vibration reduction measures. By constructing a dynamic vibration isolation zone and implementing closed-loop feedback correction, the control strategy can adapt to changes in multiple operating conditions, effectively reducing the powerhouse vibration response level while ensuring the safe and stable operation of the unit. It has the advantages of strong control targeting, good engineering applicability, and high implementation flexibility.

[0072] like Figure 4 As shown, another embodiment of this disclosure provides a collaborative control system for a hydropower plant based on vibration link decoupling, the system comprising: The process division module 410 is used to divide the vibration process of the hydropower plant into the excitation source link, the structural transmission link, and the plant response link. Vibration monitoring module 420 is used to monitor the vibration response of the factory in real time and set multi-target vibration response thresholds; The mapping construction module 430 is used to establish an operating parameter vector consisting of the unit's active power, effective head, tailwater level, and unit combination mode, and to construct the mapping relationship between the operating parameter vector and the plant vibration response. The area identification module 440 is used to identify and dynamically update the operating areas that cause the factory vibration response to exceed the vibration response threshold within the operating parameter space, thereby forming a dynamic vibration isolation zone. The decoupling control module 450 is used to perform vibration link decoupling control when the unit is in the dynamic vibration isolation zone, including operating mode adjustment and / or structural response adjustment. The strategy correction module 460 is used to dynamically correct the strategy of the vibration link decoupling control based on the feedback monitoring results of the plant vibration.

[0073] Specifically, the hydropower plant collaborative control system based on vibration link decoupling in this disclosure is used to implement the hydropower plant collaborative control method based on vibration link decoupling described in the above embodiments. The specific implementation process has been described in detail in the above embodiments and will not be repeated here.

[0074] like Figure 5 As shown, another embodiment of this disclosure provides an electronic device, including: At least one processor 501; and a memory 502 communicatively connected to the at least one processor 501 for storing one or more programs that, when executed by the at least one processor 501, enable the at least one processor 501 to implement the hydropower plant cooperative control method based on vibration link decoupling described above.

[0075] The memory 502 and processor 501 are connected via a bus, which can include any number of interconnecting buses and bridges. The bus connects various circuits of one or more processors 501 and memory 502 together. The bus can also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver can be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by processor 501 is transmitted over a wireless medium via an antenna, which further receives data and transmits it to processor 501.

[0076] Processor 501 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory 502 can be used to store data used by processor 501 during operation.

[0077] Another embodiment of this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described hydropower plant collaborative control method based on vibration link decoupling.

[0078] The computer-readable storage medium may be included in the systems or electronic devices disclosed herein, or it may exist independently.

[0079] Computer-readable storage media can be any tangible medium that contains or stores a program, and can be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device. More specific examples include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, optical fibers, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0080] Computer-readable storage media may also include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code, specific examples of which include, but are not limited to, electromagnetic signals, optical signals, or any suitable combination thereof.

[0081] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A collaborative control method for hydropower plant buildings based on vibration link decoupling, characterized in that, The method includes: The vibration process of the hydropower plant building is divided into the excitation source link, the structural transmission link, and the power plant response link. Real-time monitoring of factory vibration response and setting multi-target vibration response thresholds; Establish an operating parameter vector consisting of unit active power, effective head, tailrace water level, and unit combination mode, and construct a mapping relationship between the operating parameter vector and the powerhouse vibration response; Within the operating parameter space, the operating areas that cause the factory vibration response to exceed the vibration response threshold are identified and dynamically updated to form a dynamic vibration isolation zone. When the unit is operating in the dynamic vibration isolation zone, vibration link decoupling control is performed, including operation mode adjustment and / or structural response adjustment; Based on the feedback monitoring results of plant vibration, the vibration link decoupling control strategy is dynamically modified.

2. The hydropower plant collaborative control method based on vibration link decoupling according to claim 1, characterized in that, The excitation source link is caused by changes in the unit's operating status; the structural transmission link includes the tailrace pipe support structure, the turbine pit structure, and the powerhouse foundation and its connecting components; the powerhouse response link includes the main powerhouse structure and auxiliary buildings. The vibration response of the plant is a function of the product of the excitation source link, the structural transmission link, and the plant response link.

3. The hydropower plant collaborative control method based on vibration link decoupling according to claim 1, characterized in that, The vibration response threshold includes at least the structural safety threshold, the equipment operation threshold, and the personnel comfort threshold.

4. The hydropower plant collaborative control method based on vibration link decoupling according to claim 1, characterized in that, The adjustment of the operating mode aims to minimize the plant vibration response and is constrained by the feasible operating range of the unit.

5. The hydropower plant collaborative control method based on vibration link decoupling according to claim 1, characterized in that, The structural response adjustment is achieved by changing the transmission characteristics of the structural transmission link, and satisfies the following equation within the target frequency band: In the formula, For the adjusted structure transfer operator, For the structure transfer operator before adjustment, The frequency is within the target frequency band.

6. The hydropower plant collaborative control method based on vibration link decoupling according to claim 1, characterized in that, When the Euclidean distance between the operating parameter vector and the dynamic vibration damping zone is less than a preset distance threshold, the unit is determined to be in the dynamic vibration damping zone.

7. The hydropower plant collaborative control method based on vibration link decoupling according to claim 1, characterized in that, The dynamic vibration damping zone is dynamically updated according to the head, tailwater level and unit combination method; The vibration link decoupling control strategy is adaptively adjusted based on the updated dynamic vibration damping zone.

8. A collaborative control system for a hydropower plant based on vibration link decoupling, characterized in that, The system includes: The process division module is used to divide the vibration process of the hydropower plant into the excitation source link, the structural transmission link, and the plant response link. The vibration monitoring module is used to monitor the vibration response of the factory in real time and set multi-target vibration response thresholds; The mapping construction module is used to establish an operating parameter vector consisting of the unit's active power, effective head, tailwater level, and unit combination mode, and to construct the mapping relationship between the operating parameter vector and the plant vibration response. The area identification module is used to identify and dynamically update the operating areas that cause the factory vibration response to exceed the vibration response threshold within the operating parameter space, thereby forming a dynamic vibration isolation zone. The decoupling control module is used to perform vibration link decoupling control when the unit is in the dynamic vibration isolation zone, including operating mode adjustment and / or structural response adjustment. The strategy correction module is used to dynamically correct the strategy of the vibration link decoupling control based on the feedback monitoring results of the plant vibration.

9. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor is used to store one or more programs, which, when executed by the at least one processor, enable the at least one processor to implement the hydropower plant cooperative control method based on vibration link decoupling as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the hydropower plant collaborative control method based on vibration link decoupling as described in any one of claims 1 to 7.

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