An operation control system and method for a tidal current power plant

Abstract

The application provides a tidal power station operation control system and method, and relates to the technical field of power station operation control. The operation control system comprises a collection terminal, a control terminal and an execution component. The collection terminal is arranged in a target sea area where the power station is located, and is used to acquire seawater flow data of the target sea area. The seawater flow data comprises a flow speed and a flow direction of seawater in the target sea area. The control terminal is used to judge whether abnormal frequency band noise exists in a future power generation period according to the seawater flow data and current operation parameters of a generator set. The execution component is arranged on the generator set, and is used to adjust the operation parameters of the generator set under the control of the control terminal when abnormal frequency band noise exists in the future power generation period. The application can reduce mechanical noise, electromagnetic noise and other operation noises during the operation of the power station, and reduce environmental noise pollution of the target sea area during the operation of the power station.

Description

Technical Field

[0001] This invention relates to the technical field of power plant operation control, and specifically to an operation control system and method for a tidal power plant. Background Technology

[0002] Tidal power plants utilize the tidal energy of the ocean to generate electricity, offering significant advantages over traditional fossil fuel power generation, such as being pollution-free and having abundant reserves. However, noise pollution becomes a significant issue during the operation of tidal power plants. The noise generated by these plants includes electrical and mechanical noise, all of which pollute the surrounding ecosystem, affecting the normal activities of marine life. For example, it can interfere with the sonar communication of marine mammals and negatively impact fish behavior and reproduction. Summary of the Invention

[0003] The purpose of this invention is to provide an operation control system and method for a tidal power station, which can solve problems such as how to reduce the noise pollution of the ocean caused by tidal power stations. When the power station generates electricity based on tidal energy, the mechanical noise, electromagnetic noise and other operating noise of the power station can be reduced, thereby reducing the environmental noise pollution of the target sea area caused by the power station during operation.

[0004] To achieve the above objectives, in a first aspect, the present invention provides an operation control system for a tidal power station, the power station including at least one generator set, the generator set including a rotor and a plurality of blades mounted on the rotor;

[0005] The system includes:

[0006] The data acquisition terminal is set up in the target sea area where the power plant is located. The data acquisition terminal is used to acquire seawater flow data in the target sea area, including flow velocity and flow direction.

[0007] The control terminal is connected to the data acquisition terminal. The control terminal is used to determine whether there is abnormal frequency noise in the generator set during the future power generation period based on seawater flow data and the current operating parameters of the generator set.

[0008] The execution component, connected to the control terminal, is installed on the generator set. When abnormal frequency noise occurs during the future power generation period, the execution component adjusts the operating parameters of the generator set under the control of the control terminal to reduce environmental noise pollution to the target sea area during the operation of the power station.

[0009] According to the operation control system of a tidal power station provided by the present invention, the operating parameters of the generator set include the rotor speed of the generator set and the angle at which the blades are mounted on the rotor.

[0010] The execution components include:

[0011] At least one generator speed regulator, each generator speed regulator is installed on the corresponding generator set, the generator speed regulator is connected to the control terminal, and the generator speed regulator is used to regulate the rotor speed of the generator set under the control of the control terminal;

[0012] Multiple angle adjusters are provided, each connected to a corresponding blade of the generator set. The angle adjusters are also connected to a control terminal, and are used to adjust the angle at which the blades are mounted on the rotor under the control of the control terminal.

[0013] According to the present invention, an operation control system for a tidal power station is provided, wherein the control terminal is specifically used for:

[0014] Input the seawater flow data into the preset rotational speed prediction model to obtain the rotor rotational speed prediction curve;

[0015] The predicted rotor speed of the generator set under the current operating parameters is obtained from the speed prediction curve. The deviation between the predicted rotor speed and the actual rotor speed is used to obtain the rotor speed prediction deviation under the current operating parameters. The speed prediction curve is then corrected to obtain the actual rotor speed curve of the generator set during the future power generation period.

[0016] Based on the generator set's operating noise under the actual rotor speed curve, the generator set's noise output curve is obtained, where the noise output curve is the curve of the generator set's operating noise changing with the power generation time.

[0017] When the deviation between the noise output curve and the environmental noise curve is greater than the first preset value, it is determined that the generator set has abnormal frequency noise during the future power generation period. The environmental noise curve is the noise curve of the target sea area under the current natural environment.

[0018] According to the present invention, an operation control system for a tidal power station is provided, wherein the control terminal is specifically used for:

[0019] Based on the operating noise of the generator set during the future power generation period, the rotor speed of the generator set is adjusted, thereby adjusting the power generation of the generator set and obtaining the power adjustment curve of the generator set; where the power adjustment curve is the curve of the adjusted power generation changing with the power generation time;

[0020] Based on the power adjustment curve and the power change rate limit when adjusting the operating parameters of the generator set, the generator speed regulator is controlled to change the rotor speed of the generator set, and / or the angle regulator is controlled to adjust the angle of the blades mounted on the rotor.

[0021] The operation control system for a tidal power station provided by the present invention further includes:

[0022] The monitoring terminal is set up in the target sea area and is connected to the control terminal. The monitoring terminal is used to monitor whether there are exploration signals in the target sea area; where the exploration signal is the signal emitted by marine exploration equipment when it performs exploration tasks in the target sea area.

[0023] The control terminal is also used to control the execution components to adjust the operating parameters of the generator set when there are exploration signals in the target sea area, so as to reduce the interference of the generator set's operating noise on the exploration tasks of the marine exploration equipment.

[0024] According to the operation control system of a tidal power station provided by the present invention, the control terminal is further specifically used for:

[0025] The power output of the generator set is adjusted according to the power adjustment curve so that the frequency difference between the frequency of the generator set's operating noise and the frequency of the exploration signal is greater than the second preset value.

[0026] According to the operation control system of a tidal power station provided by the present invention, the generator set further includes at least one flywheel energy storage unit;

[0027] The system also includes:

[0028] At least one energy storage speed regulator is provided, each energy storage speed regulator is installed on the corresponding flywheel energy storage unit, the energy storage speed regulator is connected to the control terminal, and the energy storage speed regulator is used to regulate the speed of the flywheel energy storage unit under the control of the control terminal.

[0029] According to the present invention, an operation control system for a tidal power station includes a data acquisition terminal comprising:

[0030] At least one differential pressure velocity meter is installed in the target sea area. The differential pressure velocity meter is used to output a first flow velocity based on the pressure difference at different locations in the target sea area.

[0031] At least one Doppler velocimeter is installed in the target sea area. The Doppler velocimeter is used to emit laser signals into the target sea area and output a second current velocity based on the scattering result of the laser signals.

[0032] At least one Doppler current profiler is installed in the target sea area. The Doppler current profiler is used to emit ultrasonic signals into the target sea area and output a third current velocity and flow direction based on the change in the scattering frequency of the ultrasonic signals.

[0033] The processor is connected to the differential pressure velocity meter, Doppler velocimeter, and Doppler velocity profiler. The processor is used to perform fusion calculations based on the first flow velocity, the second flow velocity, and the third flow velocity, and output the flow velocity.

[0034] According to the operation control system of a tidal power station provided by the present invention, the processor is specifically used for:

[0035] Based on the correspondence between the first flow velocity, the second flow velocity, the third flow velocity and the preset weight, the first weight of the first flow velocity, the second weight of the second flow velocity and the third weight of the third flow velocity are obtained.

[0036] According to the expression To obtain the flow velocity,

[0037] In the formula, For flow velocity, For the first flow velocity, As the first weight, For the second flow rate, As the second weight, The third flow velocity, As the third weight, .

[0038] Secondly, the present invention provides an operation control method for a tidal current power station, employing the operation control system for a tidal current power station as described in the first aspect, the method comprising:

[0039] The data acquisition terminal obtains seawater flow data for the target sea area;

[0040] The control terminal determines whether there is abnormal frequency noise in the generator set during the future power generation period based on seawater flow data and the current operating parameters of the generator set.

[0041] When abnormal frequency noise occurs during the future power generation period, the control terminal controls the execution components to adjust the operating parameters of the generator set in order to reduce environmental noise pollution to the target sea area during the operation of the power station.

[0042] The operation control system and method for the tidal power station of the present invention have at least the following technical effects:

[0043] This invention provides an operation control system and method for a tidal power station. The operation control system includes a data acquisition terminal, a control terminal, and an execution component. The data acquisition terminal is located in the target sea area where the power station is situated and is used to acquire seawater flow data in the target sea area. The control terminal, based on the seawater flow data and the current operating parameters of the generator set, determines whether there is abnormal frequency noise during future power generation periods. The execution component, under the control of the control terminal, adjusts the operating parameters of the generator set when abnormal frequency noise is detected during future power generation periods. This invention allows for the adjustment of the power station's operating status based on seawater flow data when generating electricity using tidal energy, altering the conditions for abnormal noise generation during power station operation. This reduces mechanical noise, electromagnetic noise, and other operating noise during power station operation, thereby reducing environmental noise pollution to the target sea area. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0045] In the attached diagram:

[0046] Figure 1 This is a schematic diagram of the operation control system of the tidal power station of the present invention;

[0047] Figure 2 This is a schematic diagram of the seabed layout of the tidal power station of the present invention;

[0048] Figure 3 This is a flowchart of the operation control method for the tidal power plant of the present invention;

[0049] Figure 4 This is a logical schematic diagram of the operation control method for the tidal power plant of the present invention.

[0050] Figure label:

[0051] 1-Data acquisition terminal, 2-Control terminal, 3-Execution component;

[0052] 11-Generator set, 12-Blade, 13-Generator speed regulator, 14-Angle regulator, 15-Flywheel energy storage unit, 16-Energy storage speed regulator, 17-Energy storage battery pack, 18-Casing. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0054] The following detailed description of some embodiments of the present invention will be provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0055] Please see Figure 1 , Figure 1 This is a schematic diagram of the operation control system of a tidal power station provided in an embodiment of the present invention. The operation control system includes a data acquisition terminal 1, a control terminal 2, and an execution component 3. The control terminal 2 is connected to the data acquisition terminal 1, and the execution component 3 is connected to the control terminal 2.

[0056] Please see Figure 2 , Figure 2 This is a schematic diagram of a tidal power station located on the seabed. The tidal power station includes at least one generator set 11 and an energy storage battery pack 17. The electrical energy output by the generator set 11 is transmitted to the power grid and / or the energy storage battery pack 17 via cables laid on the seabed. The energy storage battery pack 17 is covered by an outer shell 18 and installed on the seabed to prevent seawater from corroding the energy storage battery pack 17.

[0057] Data acquisition terminal 1 is used to acquire seawater flow data in the target sea area. The seawater flow data includes flow velocity and flow direction. Flow velocity represents the speed of seawater flow in the target sea area, and flow direction represents the direction of seawater flow in the target sea area. Data acquisition terminal 1 is set up in the target sea area where the power plant is located. The target sea area is the sea area where the power plant is located. The scope of the target sea area can be determined based on the impact of seawater flow within the sea area on the power plant's output power. For example, multiple seawater flow data points are collected in the sea area where the power plant is located. A mathematical model is established using principles of ocean dynamics and fluid mechanics. The collected seawater flow data is input into this mathematical model to simulate the movement of ocean currents under different operating conditions. The model analyzes where seawater energy is concentrated and the relationship between seawater flow at these locations and the power generation capacity of the power plant. Locations with a strong correlation are identified as boundary points of the target sea area, and the area formed by all boundary points is defined as the target sea area.

[0058] Control terminal 2 can be configured as an industrial computer or control server, etc. Control terminal 2 is used to determine whether abnormal frequency noise exists in the generator set 11 during future power generation periods based on seawater flow data and the current operating parameters of the generator set 11. The current operating parameters characterize the current operating condition of the generator set 11, and can be represented by parameters such as the generator power output and rotor speed at the current moment. Abnormal frequency noise refers to noise that affects the ecological environment of the target sea area. Abnormal frequency noise differs from normal marine environmental sounds, including characteristics such as sound wave frequency, sound wave intensity, and periodicity. When determining abnormal frequency noise, its presence can be determined by the generator power output and rotor speed of the generator set 11. For example, a noise prediction model can be constructed based on experimental test data or on-site operation data of the power plant. The noise prediction model can be configured as a convolutional neural network model. The seawater flow data and the current operating parameters that represent the current operating conditions are input into the noise prediction model. The noise spectrum of generator set 11 during the future power generation period is obtained through the output of the noise prediction model. If the noise frequency or noise intensity represented by the noise spectrum has an impact on the ecological environment of the target sea area, then it is determined that there is abnormal frequency noise during the future power generation period.

[0059] The execution component 3 is installed on the generator set 11 of the power station. When abnormal frequency noise occurs during future power generation periods, the execution component 3, under the control of the control terminal 2, adjusts the operating parameters of the generator set 11, i.e., performs an operation adjustment task on the generator set 11, thereby reducing the operating noise of the generator set 11 and ultimately reducing environmental noise pollution to the target sea area during the operation of the power station. The execution component 3 can be a separately configured coil winding on the generator set 11, coaxially arranged with the power generation winding. This eliminates the need for additional space to install a separate execution component 3, making the entire generator set 11 more compact and easier to arrange on the seabed.

[0060] Specifically, the generator set 11 includes a rotor and multiple blades 12 mounted on the rotor. The rotor includes a shaft and a generator winding coaxially arranged with the shaft. When the generator set 11 is running, such as when a tidal turbine drives the shaft to rotate, the generator winding and a separately configured coil winding coaxially arranged with the shaft also rotate together. The generator winding cuts magnetic field lines in a magnetic field to generate electrical energy, while the separately configured coil winding can perform specific functions by connecting to external circuits or equipment according to specific functional requirements. For example, if the coil winding is connected to a control circuit, when a specific control signal is input, the coil winding can generate an additional magnetic field. This magnetic field interacts with the magnetic field generated by the generator winding, thereby regulating the output characteristics (such as voltage, frequency, speed, etc.) of the generator set 11.

[0061] Specifically, the acquisition terminal 1 can be configured as an Acoustic Doppler Current Profiler (ADCP), which utilizes the acoustic Doppler effect to transmit and receive ultrasonic signals, measuring the frequency changes caused by seawater movement as the ultrasonic waves propagate in seawater, thereby calculating the flow velocity and direction of seawater at different depths. Of course, it can also be configured as other sensors capable of acquiring seawater flow data, such as differential pressure current meters or electromagnetic current meters, as long as they can acquire seawater flow data for the target sea area; no specific limitations are imposed here.

[0062] In practical applications, the accuracy of current velocity measurements obtained by sensors or measuring instruments in target sea areas is insufficient due to factors such as temperature. Therefore, in one specific embodiment, the data acquisition terminal 1 includes at least one differential pressure velocimeter, at least one Doppler velocimeter, at least one Doppler current profiler, and a processor. The differential pressure velocimeter, Doppler velocimeter, and Doppler current profiler are all installed in the target sea area and are all connected to the processor.

[0063] It should be noted that when deploying differential pressure velocity meters, Doppler velocimeters, and Doppler current profilers in the target sea area, they can be arranged at intervals near the generator set 11. Since the Doppler velocimeters and Doppler current profilers need to emit lasers and ultrasound, brackets can be set up to install the Doppler velocimeters and Doppler current profilers so that they emit lasers and ultrasound towards the seabed. That is, the laser emission window and the ultrasound emission window are arranged downwards to reduce the sedimentation of impurities and sludge in the seawater onto the instruments.

[0064] The differential pressure velocity meter outputs the first flow velocity based on the pressure difference at different locations in the target sea area; the Doppler velocimeter emits a laser signal into the target sea area and outputs the second flow velocity based on the scattering result of the laser signal; the Doppler current profiler emits an ultrasonic signal into the target sea area and outputs the third flow velocity and flow direction based on the change in the scattering frequency of the ultrasonic signal; the processor performs fusion calculations based on the first, second, and third flow velocities and outputs the flow velocity.

[0065] When performing fusion calculations on multiple flow velocities, the first weight of the first flow velocity, the second weight of the second flow velocity, and the third weight of the third flow velocity can be obtained based on the first flow velocity, the second flow velocity, the third flow velocity, and a preset weight correspondence; further, according to the formula... To obtain flow velocity ,in, For the first flow velocity, As the first weight, For the second flow rate, As the second weight, The third flow velocity, As the third weight, =1. The weight correspondence is the correspondence between different flow velocities and weights. The weight correspondence can be established based on the experience of technical personnel or on the data obtained from calibration experiments. No specific restrictions are imposed here.

[0066] It should be noted that in the fusion calculation of multiple flow velocities, the physical characteristics, error sources, and complementary advantages of each sensor need to be comprehensively considered. For example, differential pressure velocity meters are significantly affected by changes in seawater temperature, and the impact of temperature changes on their acquisition accuracy needs to be considered, especially the significant impact of high temperatures in summer. Doppler velocimeters measure flow velocity by emitting laser signals, and seawater turbidity affects laser scattering; therefore, the second flow velocity collected by the Doppler velocimeter needs to be corrected based on seawater turbidity. Doppler current profilers need to consider the impact of different temperatures on their acquisition accuracy. Therefore, the control system can also include temperature sensors and turbidity sensors, both deployed in the target sea area to collect seawater temperature and turbidity data, respectively. The following section will elaborate on the calculation methods for each flow velocity and its corresponding weight based on the above analysis, specifically including:

[0067] The first step involves simultaneously sampling the differential pressure velocimeter, Doppler velocimeter, and Doppler velocity profiler at the same time intervals based on a preset period to obtain the first flow velocity. Second flow velocity Third flow velocity and flow direction Furthermore, the seawater temperature of the target sea area was obtained using temperature sensors and turbidity sensors, respectively. and seawater turbidity .

[0068] The second step is to determine the first weight based on the flow direction and seawater temperature. If there is a significant difference between the flow direction and the measurement direction of the differential pressure velocity meter, it indicates a significant impact on the accuracy of the first velocity measured by the differential pressure velocity meter. The value of the first weight should be reduced. The directional deviation is inversely proportional to the value of the first weight, and the directional deviation is the deviation between the flow direction and the measurement direction of the differential pressure velocity meter. Similarly, seawater temperature has a significant relationship with the measurement accuracy of both the differential pressure velocity meter and the Doppler current profiler. Calibration experiments can be conducted based on this relationship to obtain the first correspondence between seawater temperature and the first weight. The first weight can then be retrieved from the first correspondence using the current seawater temperature during the fusion calculation.

[0069] The third step is to determine the second weight based on seawater turbidity. High seawater turbidity indicates a higher concentration of suspended particles, which enhances laser scattering. Some of the laser beam may be absorbed or refracted, leading to increased measurement error. Therefore, when turbidity is high, the weight of the laser Doppler velocimeter should be reduced. A second correspondence can be derived based on this change, thus determining the second weight.

[0070] The fourth step involves determining the third weight based on a combination of seawater temperature and turbidity. Temperature significantly affects the propagation speed of ultrasound; a temperature compensation algorithm can be used to correct the sound velocity, improving measurement accuracy and reducing errors caused by temperature variations. Ultrasonic wave propagation in water is affected by scattering and absorption by particulate matter. A suitable amount of suspended particles helps improve the quality of the ultrasonic echo signal (enhancing the Doppler effect), but excessive turbidity can lead to increased ultrasonic wave attenuation, thus reducing measurement accuracy. Therefore, in extremely turbid environments, the weight of ultrasonic measurements should be reduced, while in moderately turbid environments, its weight can be increased. Based on the above corresponding change characteristics, a third correspondence is derived, which is the correspondence between seawater temperature, seawater turbidity, and the third weight. The value of the third weight is determined within this third correspondence based on the current seawater temperature and turbidity of the target sea area.

[0071] The generator set 11 operates under the impetus of tidal energy, and various types of noise are generated during operation, including mechanical noise from the generator set 11's shaft and electromagnetic noise during power generation. Simultaneously, hydrodynamic noise is generated during the rotation of the blades 12. For example, if the angle of attack between the blades 12 and the seawater is too large, it will reduce power generation efficiency and generate turbulence noise. Therefore, noise reduction from only one dimension cannot achieve the desired effect. Based on this, in one specific embodiment, the actuation component 3 includes at least one generator speed regulator 13 and multiple angle regulators 14.

[0072] The number of generator speed regulators 13 can be adapted based on the number of generator sets 11 in the power plant. Please refer to [link / reference needed]. Figure 2 Each generator speed regulator 13 is installed on its corresponding generator set 11, ensuring that each generator set 11 has a corresponding generator speed regulator 13. The controlled end of the generator speed regulator 13 is connected to the control terminal 2, and the generator speed regulator 13 is used to adjust the rotor speed of the generator set 11 under the control of the control terminal 2. Each angle regulator 14 is connected to the corresponding blade 12 of the generator set 11, and the controlled end of the angle regulator 14 is connected to the control terminal 2. The angle regulator 14 is used to adjust the connection angle of the blade 12 under the control of the control terminal 2. The connection angle refers to the angle at which the blade 12 is installed on the rotor, that is, the angle of the root of the blade 12 relative to the tangent direction of the rotor circumference. The connection angle affects the relative angle of attack between the blade 12 and the seawater, thus determining the force, rotational speed, and hydrodynamic performance of the blade 12. Adjusting the connection angle can optimize power generation efficiency and reduce abnormal noise. It can be understood that multiple blades 12 arranged in a ring are installed on the rotor of a single generator set 11. The seawater pushes the blades 12 to rotate, and the rotor cuts the magnetic field lines to generate electricity.

[0073] Furthermore, since there is a frequency difference between the mechanical noise from the rotation of the generator set 11 shaft and the hydrodynamic noise from the rotation of the blades 12, the type of noise present in the generator set 11 during future power generation can be determined by noise spectrum analysis. If the noise type is mechanical noise, the rotor speed of the generator set 11 during future power generation can be adjusted, specifically by increasing or decreasing the speed in advance. If the noise type is hydrodynamic noise, the connection angle of the blades 12 can be adjusted to reduce the hydrodynamic noise generated by the blades 12 during future power generation.

[0074] Since the main function of a power plant is to generate electricity based on tidal energy, the impact on power generation efficiency must also be considered when implementing noise reduction control. An optimization model can be established with the goal of maximizing power generation efficiency and minimizing operating noise. By balancing these two aspects, optimization calculations can be performed based on the optimization function of the optimization model to obtain the corresponding adjustment parameters for the power generation speed regulator 13 and the angle regulator 14.

[0075] Specifically, the optimization function can be configured based on actual needs. For example, it can be configured as a genetic algorithm function for iterative optimization or as a gradient descent algorithm for gradient optimization. Taking the optimization of the rotor speed of generator set 11 and the connection angle of blade 12 through a genetic algorithm as an example, the optimization process can be divided into the following steps to ensure that both power generation efficiency and operating noise can be improved.

[0076] The first step is to set the rotor speed of generator set 11 as the first adjustment range and the connection angle of blade 12 as the second adjustment range. Within these two adjustment ranges, values ​​are taken at certain intervals to form multiple parameter combinations. These parameter combinations constitute the initial population of the genetic algorithm, with each individual in the population corresponding to a combination of rotor speed and connection angle.

[0077] The second step involves evaluating each combination, calculating its power generation efficiency and operating noise. The corresponding noise suppression can be derived from the operating noise under different combinations. To balance the importance of both during the optimization process, different weights are assigned to power generation efficiency and operating noise to calculate the overall optimization result for each combination. The weight settings can be adjusted according to actual needs; for example, in some cases, more emphasis may be placed on power generation efficiency, while in ecologically sensitive areas, more emphasis may be placed on noise reduction.

[0078] The third step involves using a genetic algorithm to select, crossover, and mutate the initial population, continuously filtering out parameter combinations with better optimization effects. After multiple iterations, the rotor speed and connection angle that maximize the overall optimization result are found.

[0079] The fourth step is to determine the optimal parameter combination as the target value for implementation of regulation, and adjust the operating parameters of generator set 11 through control terminal 2 so that it can control the noise level within a reasonable range while ensuring efficient power generation.

[0080] During the power generation process using tidal energy, the output power of the power station fluctuates with the flow of seawater. To ensure good transient energy storage, at least one flywheel energy storage unit 15 and a supercapacitor are connected to the generator set 11. The flywheel energy storage unit 15 converts the electrical energy output from the generator set 11 into mechanical energy. Mechanical and electromagnetic noise also occurs during the energy storage process of the flywheel energy storage unit 15. Therefore, in one specific embodiment, the operation control system further includes at least one energy storage speed regulator 16. The number of energy storage speed regulators 16 is determined by the number of flywheel energy storage units 15, and both are set to the same number.

[0081] Please continue reading. Figure 2 Each energy storage speed regulator 16 is installed on its corresponding flywheel energy storage unit 15. The controlled end of the energy storage speed regulator 16 is connected to the control terminal 2. The energy storage speed regulator 16 is used to adjust the speed of the flywheel energy storage unit 15 under the control of the control terminal 2. Based on the remaining charge (SOC, State of Charge) of the energy storage battery pack 17 and the current speed of the flywheel energy storage unit 15, it can be determined whether the flywheel energy storage unit 15 will emit abnormal frequency noise during future power generation periods. If abnormal frequency noise exists, the speed of the flywheel energy storage unit 15 is adjusted through the energy storage speed regulator 16 to reduce its noise pollution to the marine environment.

[0082] It should be noted that the generator speed regulator 13, angle regulator 14, and energy storage speed regulator 16 can all be configured as AC motors, directly utilizing the electrical energy output from the tidal power station for regulation. This method eliminates the need for additional DC-DC conversion equipment, reducing energy conversion losses and improving energy utilization. Furthermore, AC motors offer better dynamic response characteristics, allowing for rapid adjustment of the rotor speed of the generator set 11, the speed of the flywheel energy storage unit 15, and the connection angle of the blades 12. This enables the generator set 11 and the energy storage system (including the energy storage battery pack 17 and the flywheel energy storage unit 15) to react quickly to changes in the tidal environment, thereby optimizing power generation efficiency, reducing power station operating noise, and lowering maintenance costs.

[0083] The ocean is rich in various resources. To explore the distribution of these resources, marine exploration equipment is needed to perform exploration tasks, including sonar mapping and marine biological detection. If the operating noise of generator set 11 is close to the frequency of the exploration signal, it may lead to data distortion, reduced detection accuracy, or even affect the normal operation of the exploration equipment. Based on this, in one specific implementation, the operation control system also includes a monitoring terminal, which can be a hydrophone, Doppler acoustic detection device, etc.

[0084] The monitoring terminal is located in the target sea area where the power station is situated. It is connected to the control terminal 2. The monitoring terminal monitors for the presence of exploration signals in the target sea area, which are signals emitted by marine exploration equipment during exploration operations. The control terminal 2 also controls the execution component 3 to adjust the operating parameters of the generator set 11 when exploration signals are present, thereby reducing the interference of generator set 11's operating noise on the marine exploration equipment's exploration tasks. The operating parameters of the generator set 11 include its rotor speed and the connection angle of the blades 12. Reducing the rotor speed of the generator set 11 can reduce eddy current noise and mechanical vibration noise. While ensuring basic power generation needs, the rotor speed is gradually reduced to below the noise threshold. By controlling the connection angle of the blades 12 to adjust the tidal force, the hydrodynamic noise generated by the blades 12 is controlled, reducing high-frequency noise components and improving noise suppression. When marine exploration signals are strong and the equipment is highly sensitive to noise, a short-term shutdown mode can be triggered, resuming operation after the exploration task is completed.

[0085] Based on the same technical concept as the operation control system of the foregoing embodiments, another embodiment of the present invention provides an operation control method for a tidal current power station. For the operation control system of the tidal current power station using the foregoing embodiments, please refer to... Figure 3 , Figure 3 The flowchart is for the operation control method, which includes:

[0086] S11. The data acquisition terminal 1 acquires seawater flow data of the target sea area where the power station is located. The seawater flow data includes the flow speed and flow direction of the seawater in the target sea area.

[0087] Specifically, when acquiring seawater flow data, filtering can be performed based on the interval values ​​of various data types to remove outliers or invalid data, thereby improving data reliability. The collected data undergoes initial screening to remove outliers exceeding reasonable ranges. Further smoothing of the seawater flow data using moving average filtering or median filtering reduces the impact of short-term fluctuations on subsequent calculations. Seawater flow data represents the flow speed and direction in the target sea area during future power generation periods, significantly influencing the power generation capacity of the power plant. Monitoring this data can help predict the subsequent operation of the power plant.

[0088] S12. Based on the seawater flow data and the current operating parameters of the generator set 11, the control terminal 2 determines whether there is abnormal frequency noise in the generator set 11 during the future power generation period.

[0089] Specifically, the noise spectrum of generator set 11 during future power generation periods can be calculated based on empirical formulas or machine learning noise prediction models. If the noise spectrum indicates that generator set 11 has significant mechanical noise, hydrodynamic noise, or electromagnetic noise during future power generation periods, then an abnormal noise frequency band is identified.

[0090] It is understandable that when determining whether there is an abnormal noise frequency band, a frequency band library of abnormal noise can be constructed by using the historical operating data and noise test data of the power plant. When the noise spectrum is similar to the noise in the frequency band library, it can be determined that there is an abnormal noise frequency band.

[0091] For example, step S12 includes sub-steps S12-1 to S12-4, which are described in detail below:

[0092] S12-1. Input the seawater flow data into the preset rotational speed prediction model to obtain the rotor rotational speed prediction curve. The rotational speed prediction model can be a convolutional neural network model, trained based on a sample set until the prediction accuracy reaches the preset requirements. The seawater flow data is used as an input variable and input into the rotational speed prediction model. Based on the power generation operation characteristics of generator set 11, the rotational speed prediction model calculates the rotor speed of the generator set under different seawater flow conditions and generates the rotational speed prediction curve for future power generation periods. This rotational speed prediction curve reflects the theoretical rotational speed of generator set 11 during future power generation periods, providing a data processing reference for subsequent noise analysis.

[0093] S12-2. Based on the speed prediction curve, the predicted speed of the rotor of generator set 11 under the current operating parameters is obtained. Based on the deviation between the predicted speed and the actual speed of the rotor, the speed prediction deviation of the rotor under the current operating parameters is obtained, thereby correcting the speed prediction curve and obtaining the actual speed curve of the rotor of generator set 11 during the future power generation period.

[0094] Specifically, the speed prediction deviation is the difference between the predicted and actual rotor speed of generator set 11 under current operating parameters. Since the operating state of generator set 11 is affected by factors such as equipment wear, load regulation, and control strategies, the actual rotor speed output often deviates from the theoretical prediction. The rotor speed prediction deviation under current operating parameters reflects the influence of these various factors, thereby correcting the speed prediction curve and obtaining a more accurate actual speed curve. The speed prediction deviation under current operating parameters also reveals the power generation characteristics affected by factors such as equipment aging and seawater flow fluctuations, allowing for the establishment of an error distribution model, identification of major error sources, and the use of regression analysis or machine learning methods to fit the errors and predict the error change trend during future power generation periods.

[0095] If the error is mainly caused by equipment aging, an equipment attenuation factor can be introduced into the speed prediction model to dynamically adjust the speed prediction curve. For example, for generator set 11, which has been operating for a long time, speed prediction and compensation can be performed based on its service life and historical attenuation curve. If the error is related to environmental factors such as seawater flow changes, temperature, and pressure, an environmental impact correction model can be established based on environmental data to adjust the speed prediction curve. The speed prediction curve will be adjusted to a corrected speed curve that better reflects the actual operating conditions, i.e., the final actual speed curve. This actual speed curve can more accurately reflect the speed output of the power station under real operating conditions, providing reliable data support for subsequent noise prediction and optimized control.

[0096] S12-3. Based on the operating noise of generator set 11 under the actual rotor speed curve, the noise output curve of generator set 11 is obtained. This noise output curve represents the change in operating noise of generator set 11 over power generation time. The operating noise of generator set 11 mainly originates from hydrodynamic noise, mechanical vibration noise, and electromagnetic noise. Hydrodynamic noise is closely related to blade speed and seawater flow velocity, while mechanical noise depends on the rotor operating state of generator set 11. Based on empirical formulas or machine learning models, the noise output curve of generator set 11, i.e., the curve of operating noise changing over power generation time, can be calculated according to different blade speeds, load conditions, and equipment vibration conditions. The noise output curve reflects the noise level of the power station during future power generation periods, providing a basis for subsequent identification of abnormal noise.

[0097] S12-4. When the deviation between the noise output curve and the environmental noise curve is greater than the first preset value, it is determined that the generator set 11 has abnormal frequency noise during the future power generation period. The environmental noise curve is the noise curve of the target sea area under the current natural environment.

[0098] Specifically, the ambient noise curve represents the background noise level in the current natural environment, including underwater noise generated by factors such as ocean waves and marine life activities. If the deviation between the noise output curve and the ambient noise curve exceeds a first preset value (for example, the sound in a certain frequency band is more than 10 dB higher than the ambient noise), it is determined that the generator set 11 has abnormal frequency noise during that period. This abnormal frequency noise may affect the marine ecological environment or interfere with marine exploration equipment, so it is necessary to trigger the operation control system to make operational adjustments and optimize the rotor speed or blade connection angle of the generator set 11 to reduce the noise impact.

[0099] At this point, based on seawater flow data and the current operating parameters of generator set 11, it has been determined whether generator set 11 will have abnormal frequency noise during future power generation periods.

[0100] S13. When there is abnormal frequency noise in the generator set 11 during the future power generation period, the control terminal 2 controls the execution component 3 to adjust the operating parameters of the generator set 11, that is, to perform the operation adjustment task to reduce the environmental noise pollution of the target sea area during the operation of the generator set 11.

[0101] Specifically, when adjusting the operation of generator set 11, the adjustment target can be determined based on the noise characteristics of the future power generation period. The adjustment target includes the rotor speed and output power of generator set 11. Based on the adjustment target, the corresponding adjustment command is output to the execution component 3 to change the operating state of generator set 11 during the future power generation period and reduce the environmental noise pollution generated by generator set 11.

[0102] In practical applications, since generator set 11 needs to generate electricity and connect to the grid or store electrical energy during operation, significant changes in the operating state of generator set 11 caused by adjusting the execution component 3 would lead to large fluctuations in grid connection or energy storage. Therefore, in one specific embodiment, the execution component 3 includes a generator speed regulator 13 installed on the corresponding generator set 11 and an angle regulator 14 on the corresponding blade 12; controlling the execution component 3 to perform operational adjustment tasks includes:

[0103] S13-1. Based on the operating noise of generator set 11 during future power generation periods, adjust the rotor speed of generator set 11, thereby adjusting the power generation of generator set 11 and obtaining the power adjustment curve of generator set 11. To reduce the operating noise of generator set 11, it is necessary to adjust the power generation of generator set 11. The curve showing the change of the adjusted power generation with power generation time is the power adjustment curve.

[0104] S13-2. Based on the power adjustment curve and the power change rate limit when adjusting the operating parameters of generator set 11, control the generator speed regulator 13 to output a corresponding torque to change the rotor speed of generator set 11, and / or the angle regulator 14 to adjust the connection angle of blade 12. The power change rate limit can be set based on the response rate of power station grid connection and energy storage, or it can be dynamically adjusted based on the current remaining power of energy storage battery pack 17. When adjusting the power adjustment curve through the power change rate limit, it is necessary to make the output power of the power station smoother and reduce the impact of large fluctuations on grid connection and energy storage control. When executing the power generation adjustment of generator set 11, the generator speed regulator 13 outputs a corresponding torque adjustment command to change the rotor speed of generator set 11.

[0105] Furthermore, the operation control method also includes: determining whether there is an exploration signal in the target sea area, where the exploration signal is the signal emitted by the marine exploration equipment when performing exploration tasks in the target sea area. When there is no exploration signal in the target sea area, generator set 11 generates electricity normally. Conversely, if there is an exploration signal in the target sea area, it indicates that the operation of the power station has an impact on marine exploration. Therefore, the power generation of generator set 11 is adjusted according to the power adjustment curve to ensure that the frequency difference between the operating noise frequency of generator set 11 and the frequency of the exploration signal is greater than a second preset value.

[0106] Similarly, the power adjustment curve is a curve set based on the maximum allowable fluctuation range of the power generation. When the exploration signal is present, the rotor speed of the generator set 11 is adjusted according to the power adjustment curve to change the main frequency of the operating noise. By reducing or increasing the rotor speed of the generator set 11, the main frequency of the noise is shifted to a frequency range far away from the exploration signal, ensuring that the frequency difference between the two is greater than the second preset value, thereby reducing signal interference.

[0107] The operation and control method of the tidal power plant according to an embodiment of the present invention will be described in general below. Please refer to [link / reference]. Figure 4 , Figure 4 The overall operational logic diagram of the operation control method includes:

[0108] S401. Obtain the first, second, and third current velocities and flow direction of the target sea area, as well as the seawater temperature and turbidity.

[0109] S402. Determine the first weight, second weight, and third weight based on the flow direction, seawater temperature, and seawater turbidity.

[0110] S403. The flow velocity of the target sea area is obtained by fusion calculation based on the first flow velocity, the second flow velocity, the third flow velocity, the first weight, the second weight, and the third weight.

[0111] S404. Input the flow velocity and flow direction into the rotational speed prediction model to obtain the rotor rotational speed prediction curve.

[0112] S405. By using the speed prediction curve and the speed prediction deviation of the rotor under the current operating parameters, the actual speed curve of the rotor of the generator set during the future power generation period is obtained.

[0113] S406. Obtain the noise output curve of the generator set based on the operating noise of the generator set under the actual rotor speed curve.

[0114] S407. Determine whether the deviation between the noise output curve and the ambient noise curve is greater than the first preset value.

[0115] S408. When the deviation between the noise output curve and the ambient noise curve is not greater than the first preset value, output a return command to return to step S401.

[0116] S409. When the deviation between the noise output curve and the environmental noise curve is greater than the first preset value, it is determined that the generator set has abnormal frequency noise during future power generation periods.

[0117] S410. Obtain the power adjustment curve of the generator set based on the operating noise of the generator set during the future power generation period.

[0118] S411. Based on the power adjustment curve and the power change rate limit of the generator set performing the operation adjustment task, determine the first adjustment range of the rotor speed of the generator set and the second adjustment range of the blade connection angle.

[0119] S412. Take values ​​at intervals according to the first and second adjustment intervals, calculate the power generation efficiency and operating noise, and use a genetic algorithm to find the rotor speed and connection angle that maximize the comprehensive optimization result.

[0120] S413. Based on the rotor speed and connection angle that reach the maximum value according to the comprehensive optimization results, control the generator speed regulator to output the corresponding torque and the angle regulator to rotate to the corresponding angle.

[0121] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. It should be understood that the invention is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A system for operating control of a tidal power plant, characterized in that, The power station comprises at least one generator set, the generator set comprising a rotor and a plurality of blades mounted on the rotor; The system comprises: A collection terminal arranged in a target sea area where the power station is located, the collection terminal being configured to acquire seawater flow data of the target sea area, wherein the seawater flow data comprises flow speed and flow direction; A control terminal connected with the collection terminal, the control terminal being configured to determine whether the generator set has abnormal frequency band noise in a future power generation period according to the seawater flow data and current operation parameters of the generator set; An execution component connected with the control terminal, the execution component being arranged on the generator set, and the execution component being configured to adjust the operation parameters of the generator set under the control of the control terminal when the generator set has abnormal frequency band noise in the future power generation period, so as to reduce environmental noise pollution of the target sea area caused by the operation of the power station; The operation parameters of the generator set comprise rotor speed of the generator set and an angle at which the blades are mounted on the rotor; The execution component comprises: At least one power generation speed regulator, each power generation speed regulator being mounted on a corresponding generator set, the power generation speed regulator being connected with the control terminal, and the power generation speed regulator being configured to adjust the rotor speed of the generator set under the control of the control terminal; A plurality of angle regulators, each angle regulator being connected with a corresponding blade of the generator set, the angle regulator being connected with the control terminal, and the angle regulator being configured to adjust the angle at which the blades are mounted on the rotor under the control of the control terminal; The control terminal is specifically configured to: input the seawater flow data into a preset rotor speed prediction model to obtain a rotor speed prediction curve of the rotor; obtain a predicted rotor speed of the rotor under the current operation parameters of the generator set according to the rotor speed prediction curve, obtain a rotor speed prediction deviation of the rotor under the current operation parameters according to a deviation between the predicted rotor speed and an actual rotor speed of the rotor, correct the rotor speed prediction curve to obtain an actual rotor speed curve of the rotor of the generator set in the future power generation period, and obtain a noise output curve of the generator set according to operation noise of the generator set under the actual rotor speed curve, wherein the noise output curve is a curve of the operation noise of the generator set varying with power generation time. When a deviation between the noise output curve and an environmental noise curve is greater than a first preset value, it is determined that the generator set has the abnormal frequency band noise in the future power generation period, wherein the environmental noise curve is a noise curve of the target sea area under a current natural environment.

2. A tidal power plant operating control system according to claim 1, characterised in that, The control terminal is specifically configured to: adjust the rotor speed of the generator set according to operation noise of the generator set in the future power generation period, so as to adjust power generation power of the generator set, obtain a power adjustment curve of the generator set, and wherein the power adjustment curve is a curve of the adjusted power generation power varying with power generation time. According to the power adjustment curve and the power change rate limit when adjusting the operating parameters of the generator set, the control of the generator speed regulator changes the rotor speed of the generator set, and / or the angle regulator adjusts the angle of the blades installed on the rotor.

3. A tidal power plant operating control system according to claim 2, characterised in that, Also includes: A monitoring terminal is arranged in the target sea area, the monitoring terminal is connected with the control terminal, and the monitoring terminal is used for monitoring whether there is an exploration signal in the target sea area; wherein the exploration signal is a signal emitted by the marine exploration equipment when performing exploration task in the target sea area; The control terminal is also used for controlling the execution assembly to adjust the operating parameters of the generator set to reduce the interference of the operating noise of the generator set on the exploration task of the marine exploration equipment when the target sea area has the exploration signal.

4. A tidal power plant operating control system according to claim 3, characterised in that, The control terminal is also specifically used for: According to the power adjustment curve, the power of the generator set is adjusted, so that the frequency difference between the operating noise frequency of the generator set and the frequency of the exploration signal is greater than a second preset value.

5. The operating control system of a tidal power plant according to claim 1, characterized in that, The generator set further comprises at least one flywheel energy storage unit; The system further comprises: At least one energy storage speed regulator, each energy storage speed regulator is installed on the corresponding flywheel energy storage unit, the energy storage speed regulator is connected with the control terminal, and the energy storage speed regulator is used for adjusting the speed of the flywheel energy storage unit under the control of the control terminal.

6. The operating control system of a tidal power plant according to claim 1, characterized in that, The acquisition terminal comprises: At least one differential pressure flowmeter is installed in the target sea area, and the differential pressure flowmeter is used for outputting a first flow rate according to the pressure difference of different positions in the target sea area; At least one Doppler speedometer is installed in the target sea area, the Doppler speedometer is used for emitting laser signal to the target sea area, and outputting second flow rate according to the scattering result of the laser signal; At least one Doppler flow velocity profiler is installed in the target sea area, the Doppler flow velocity profiler is used for emitting ultrasonic signal to the target sea area, and outputting third flow rate and the flow direction according to the scattering frequency change of the ultrasonic signal; A processor is connected with the differential pressure flowmeter, the Doppler speedometer and the Doppler flow velocity profiler, and the processor is used for fusion calculation processing according to the first flow rate, the second flow rate and the third flow rate, and outputting the flow velocity.

7. A tidal power plant operating control system according to claim 6, characterised in that, The processor is specifically used for: According to the first flow rate, the second flow rate, the third flow rate and the preset weight corresponding relationship, the first weight of the first flow rate, the second weight of the second flow rate and the third weight of the third flow rate are obtained; The flow velocity is obtained according to the expression , wherein is a flow rate, is a first flow rate, is a first weight, is a second flow rate, is a second weight, is a third flow rate, is a third weight, .

8. A method of operating control of a tidal power plant, characterized by, The operation control system of the tidal current power station comprises: The acquisition terminal acquires the seawater flow data of the target sea area; The control terminal judges whether there is abnormal frequency band noise of the generator set in the future power generation period according to the seawater flow data and the current operating parameters of the generator set; When the generator set has abnormal frequency band noise in a future power generation period, the control terminal controls the execution component to adjust the operation parameter of the generator set, so as to reduce the environmental noise pollution of the target sea area during the operation of the power station.

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