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CN-121613754-B - Wave energy power generation self-adaptive rectification system adapting to complex sea conditions

CN121613754BCN 121613754 BCN121613754 BCN 121613754BCN-121613754-B

Abstract

The invention discloses a wave energy power generation self-adaptive rectification system adapting to complex sea conditions, belonging to the fields of new energy power generation, ocean engineering and power electronics, the system comprises a bionic flexible module, a multi-physical-field data acquisition module, a central coordination module, a communication and broadcasting module, a distributed rectifying and local control module, an electromechanical fusion decision module, a bionic structure tuning module and a direct current convergence module. The invention adopts the bionic flexible module to capture wave energy, generates wave prediction parameters by acquiring data of a hydrodynamic field and a solid mechanical field, further generates a global instruction, and broadcasts the global instruction to distributed rectifying and control nodes. Each node automatically adjusts the rectification switch parameters and generates electromechanical fusion decision data for dynamically tuning the local rigidity of the bionic flexible module. The system realizes cooperative self-adaptive control of mechanical collection and electric rectification, can cope with complex and changeable ocean environments, and improves capturing efficiency of wave energy and stability of electric energy output.

Inventors

  • MU HONGYU
  • ZHOU QIANG

Assignees

  • 山东理工大学

Dates

Publication Date
20260508
Application Date
20260128

Claims (10)

  1. 1. A wave energy power generation adaptive rectification system adapted to complex sea conditions, the system comprising: the bionic flexible module is used for capturing wave energy, and is integrated with a plurality of energy capturing areas capable of independently tuning local rigidity, a distributed energy conversion substructure and an intelligent fluid cavity for tuning the local rigidity; the multi-physical-field data acquisition module is used for acquiring data from the hydrodynamic field sensor and data from the solid mechanical field sensor of the bionic flexible module, and generating wave prediction parameters by fusing the data; The central coordination module is used for receiving the wave prediction parameters and generating a global target working mode instruction based on the wave prediction parameters; the communication and broadcasting module is used for broadcasting the global target working mode instruction to a plurality of distributed rectifying and control nodes; the distributed rectifying and local control module comprises a plurality of distributed rectifying and control nodes and is used for adjusting the switching parameters of the rectifying circuit and broadcasting the local rectifying parameters based on the global target working mode instruction and the local perception data of the global target working mode instruction; The electromechanical fusion decision module is used for monitoring a back electromotive force signal generated by the distributed energy conversion substructure and generating electromechanical fusion decision data by combining received local rectification parameters from adjacent distributed rectification and control nodes, wherein the adjacent distributed rectification and control nodes are distributed rectification and control nodes in a bionic flexible module, and a direct or nearest mechanical coupling or electric energy transmission path exists between the distributed energy conversion substructure and another distributed energy conversion substructure; The bionic structure tuning module is used for receiving the electromechanical fusion decision data, controlling the intelligent fluid cavity based on the electromechanical fusion decision data and dynamically tuning the local rigidity of the bionic flexible module; And the direct current converging module is used for parallelly connecting direct current outputs of all the distributed rectifying and control nodes into a direct current bus to generate stable direct current electric energy.
  2. 2. The wave energy power generation self-adaptive rectification system adapting to complex sea conditions according to claim 1 is characterized in that the multi-physical-field data acquisition module comprises a hydrodynamic field data unit, a solid mechanical field data processing unit and a multi-field data fusion processing unit; The hydrodynamic field data unit is used for acquiring wave height, period and direction data through the hydrodynamic field sensor; The solid mechanical field data processing unit is used for acquiring structural strain data of the bionic flexible module through the solid mechanical field sensor and calculating deformation speed data according to the structural strain data; and the multi-field data fusion processing unit is used for fusing the wave height, period and direction data with the structural strain and deformation speed data and processing the wave height, period and direction data with the structural strain and deformation speed data through a model prediction control algorithm to obtain wave prediction parameters.
  3. 3. The wave energy power generation adaptive rectification system adapting to complex sea conditions according to claim 1, wherein the central coordination module comprises a prediction parameter analysis unit, a target decision unit and a global instruction generation unit; the prediction parameter analysis unit is used for receiving and analyzing the wave prediction parameters; The target decision unit is used for determining a working target based on the wave prediction parameters, wherein the working target comprises a priority of ensuring stable output and a priority of pursuing power capture; And the global instruction generating unit is used for generating a global target working mode instruction containing a weight coefficient according to the working target and outputting the global target working mode instruction to the communication and broadcasting module.
  4. 4. The wave energy power generation adaptive rectification system adapting to complex sea conditions according to claim 1, wherein the communication and broadcasting module comprises an instruction encoding unit, a message sending unit and an instruction receiving and decoding unit; the instruction encoding unit is used for encoding the global target working mode instruction into a broadcast message; a message transmitting unit for transmitting a broadcast message through a communication network; The instruction receiving and decoding unit is configured in the distributed rectifying and control nodes and is used for receiving the broadcast message and decoding and obtaining global target working mode instructions.
  5. 5. The wave energy power generation self-adaptive rectification system adapting to complex sea conditions according to claim 1, wherein the distributed rectification and local control module comprises a local perception data acquisition unit, a local control strategy execution unit and a local rectification parameter broadcasting unit; The local sensing data acquisition unit is used for acquiring local motion acceleration data, local temperature data and local output current and voltage data through the local motion sensor, the temperature sensor and the current and voltage sampling circuit, and fusing the data to form local sensing data; the local control strategy execution unit is used for automatically adjusting the switching frequency and the duty ratio of the rectifying circuit based on the received global target working mode instruction and the local perception data; and the local rectification parameter broadcasting unit is used for broadcasting the local rectification parameter determined by the switching frequency and the occupation ratio.
  6. 6. The wave energy power generation adaptive rectification system adapted to complex sea conditions of claim 5, wherein said local perception data collection unit comprises: A multi-dimensional sensor subunit including a local motion sensor, a temperature sensor, and current and voltage sampling circuitry; and the data acquisition and fusion subunit is used for acquiring local motion acceleration data, local temperature data and local output current and voltage data through the multidimensional sensor, and fusing the data to form local perception data.
  7. 7. The wave energy power generation self-adaptive rectification system adapting to complex sea conditions according to claim 6, wherein the electromechanical fusion decision module comprises a back electromotive force feature extraction unit, a neighboring distributed rectification and control node parameter receiving unit and a fusion decision generation unit; The back electromotive force feature extraction unit is used for monitoring the back electromotive force signals generated by the distributed energy conversion substructure and extracting the back electromotive force features of the back electromotive force signals; A neighboring distributed rectifying and control node parameter receiving unit for receiving local rectifying parameters broadcast from the neighboring distributed rectifying and control node; And the fusion decision generation unit is used for fusing the back electromotive force characteristics, the received local rectification parameters and the data from the local motion sensor to generate electromechanical fusion decision data.
  8. 8. The wave energy power generation self-adaptive rectification system adapting to complex sea conditions according to claim 1 is characterized in that the bionic structure tuning module comprises a matching state judging unit, a tuning instruction generating unit and an intelligent fluid cavity control unit; the matching state judging unit is used for judging the matching state of the local rigidity of the current bionic flexible module and wave excitation based on the electromechanical fusion decision data; The tuning instruction generating unit is used for generating a tuning instruction according to the mismatch state when the matching state judging unit judges that the tuning instruction is mismatch; And the intelligent fluid cavity control unit is used for controlling the fluid viscosity and the internal pressure of the intelligent fluid cavity according to the tuning instruction and dynamically tuning the local rigidity of the bionic flexible module.
  9. 9. The wave energy power generation self-adaptive rectification system adapting to complex sea conditions according to claim 1 is characterized in that the direct current converging module comprises a direct current bus and parallel connection access unit, a filtering processing unit and a stable output unit; the direct current bus and parallel connection access unit is used for connecting direct current output of all the distributed rectifying and control nodes to the direct current bus in a parallel connection mode; The filtering processing unit is arranged on the direct current bus and is used for carrying out filtering processing on the collected electric energy; and the stable output unit is used for outputting the stable direct current electric energy after the filtering treatment.
  10. 10. A wave energy power generation adaptive rectification method adapted to complex sea conditions, characterized in that the method is used for a wave energy power generation adaptive rectification system adapted to complex sea conditions according to any one of claims 1-9, the method comprising: wave energy is captured, and a plurality of energy capturing areas capable of independently tuning local rigidity, a distributed energy conversion substructure and an intelligent fluid cavity for tuning the local rigidity are integrated; acquiring data from a hydrodynamic field sensor and data from a solid mechanical field sensor, and fusing the data to generate wave prediction parameters; Receiving the wave prediction parameters and generating a global target working mode instruction based on the wave prediction parameters; broadcasting the global target working mode instruction to a plurality of distributed rectifying and control nodes; Based on the global target working mode instruction and own local perception data, adjusting the switching parameters of the rectifying circuit and broadcasting the local rectifying parameters; monitoring a back electromotive force signal generated by the distributed energy conversion substructure, and generating electromechanical fusion decision data by combining received local rectification parameters from adjacent distributed rectification and control nodes, wherein the adjacent distributed rectification and control nodes are distributed rectification and control nodes with direct or nearest mechanical coupling or electric energy transmission paths between the distributed energy conversion substructure and another distributed energy conversion substructure; receiving the electromechanical fusion decision data, controlling an intelligent fluid cavity based on the electromechanical fusion decision data, and dynamically tuning the local rigidity of the bionic flexible module; And D, connecting the direct current outputs of all the distributed rectifying and control nodes into a direct current bus in parallel to generate stable direct current electric energy.

Description

Wave energy power generation self-adaptive rectification system adapting to complex sea conditions Technical Field The invention relates to the fields of new energy power generation, ocean engineering and power electronics, in particular to a wave energy power generation self-adaptive rectification system adapting to complex sea conditions. Background The wave energy is used as a clean and renewable ocean energy source, has the characteristics of large reserve and high energy density, and is an important direction for developing new energy sources at present. Wave energy power plants (WECs) typically involve multiple links for energy capture, conversion, rectification, and output. The randomness, complexity and severity of waves present a significant challenge to the energy capture efficiency and electrical energy output stability of WEC devices. In the related art, the Chinese patent application with the bulletin number of CN112594120A discloses a marine energy device integrating an observation buoy and a wave current power generation system, wherein a wave power generation system and a tide power generation system are arranged on a device body, so that comprehensive collection and utilization of water-crossing marine energy are realized. The wave power generation system is provided with a wave floater and a wave energy collecting module. The device aims to face the power supply requirements of the marine observation buoy and the navigation mark lamp, combines the marine energy power generation technology with the power supply of marine instrument equipment, and accelerates the conversion of technical achievements to productivity. For the related technology, the existing WEC device mainly relies on a wave floater with a rigid structure or fixed parameters to capture energy, and the mechanical natural frequency of the existing WEC device is difficult to match with the changeable wave frequency under the complex sea conditions in real time, so that the energy capturing efficiency is low in most of the time. More importantly, the electric energy rectifying link (AC/DC conversion) of the existing system usually adopts a fixed control strategy, and lacks the capability of real-time sensing and collaborative adjustment of the mechanical motion state and sea state change of the acquisition end. The disconnection of the collection and rectification ensures that the output electric energy has severe fluctuation and poor quality under complex and severe sea conditions, and simultaneously increases the risk of damage of a system structure due to excessive impact, thereby being unfavorable for long-term, efficient and reliable operation. Disclosure of Invention In order to solve the problems, the invention provides a wave energy power generation self-adaptive rectification system adapting to complex sea conditions, which adopts an electromechanical fusion method integrating bionic flexible structure tuning and distributed rectification control, and can adjust physical form and electrical parameters of the system in real time according to predicted sea conditions, thereby realizing cooperative improvement of energy capture efficiency and operation stability. In order to achieve the above purpose, the application adopts the following technical scheme: In a first aspect, a wave energy power generation self-adaptive rectification system adapting to complex sea conditions is provided, comprising a bionic flexible module, a multi-physical-field data acquisition module, a central coordination module, a communication and broadcasting module, a distributed rectification and local control module, an electromechanical fusion decision module, a bionic structure tuning module and a direct current convergence module, wherein: the bionic flexible module is used for capturing wave energy, and is integrated with a plurality of energy capturing areas capable of independently tuning local rigidity, a distributed energy conversion substructure and an intelligent fluid cavity for tuning the local rigidity; the multi-physical-field data acquisition module is used for acquiring data from the hydrodynamic field sensor and data from the solid mechanical field sensor of the bionic flexible module, and generating wave prediction parameters by fusing the data; The central coordination module is used for receiving the wave prediction parameters and generating a global target working mode instruction based on the wave prediction parameters; the communication and broadcasting module is used for broadcasting the global target working mode instruction to a plurality of distributed rectifying and control nodes; the distributed rectifying and local control module comprises a plurality of distributed rectifying and control nodes and is used for adjusting the switching parameters of the rectifying circuit and broadcasting the local rectifying parameters based on the global target working mode instruction and the local perception data of the global target