Wave energy power generation control system and method

Abstract

The invention discloses a wave power generation control system and method. The system comprises a wave energy capturing device, a stable gas output module, a pneumatic conversion module, a generator and an electric energy control module, the wave energy capturing device is used for converting wave energy into pneumatic energy; the gas stable output module is used for stably outputting the pneumatic energy to the pneumatic conversion module; the pneumatic conversion module is used for converting the stably output pneumatic energy into mechanical energy; the generator is used for converting the mechanical energy into electric energy and outputting the electric energy to the electric energy control module; the electric energy control module is used for receiving the cabin pressure of the wave energy capturing device in real time and collecting the rotating speed of the generator; and the electric energy is controlled to be output in a maximum energy mode according to the pressure and the rotating speed of the cabin body based on the PID principle. According to the scheme, stable output of wave energy is achieved, and meanwhile control output of the maximum wave energy is achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of wave energy power generation control, and in particular, to a wave energy power generation control system and method. Background Art

[0002] The natural resources on the earth are limited and cannot meet the growing global energy demand. It is a consensus among most countries to use renewable energy to increase energy production. Driven by the "dual carbon" goal, clean energy has gradually become the mainstream direction for the future development of energy. With the large-scale development of onshore wind power and photovoltaic power generation, people are increasingly concerned about the utilization of marine energy. About 71% of the earth's surface area is the ocean, which not only has rich oil and fishery resources, but also contains huge amounts of renewable energy, mainly including wave energy, temperature difference energy, tidal energy, salinity difference energy, tidal current energy, and marine wind energy, etc. Wave power generation has become the focus of attention in countries such as the UK, Sweden, Portugal, China, and Japan. China has vigorously developed offshore wind power, but the very rich marine energy has not been utilized. As a renewable energy contained in the ocean, wave energy has the advantages of renewability and environmental friendliness. Wave energy is a specific form of marine energy and one of the most important energies in marine energy. The total theoretical reserves of various marine energy resources in China's coastal, offshore and adjacent sea areas are about 6.11×10^11 kW, among which wave energy accounts for the largest proportion, about 5.74×10^11 kW, and the exploitable amount is huge. Since wave energy is the renewable clean energy with the highest grade and the widest distribution in marine energy, if wave energy can be efficiently utilized, it is expected to achieve large-scale commercial promotion and application, solve the power supply problems of islands, offshore aquaculture, offshore platforms, etc., and solve the problem of insufficient electricity in China.

[0003] Wave energy refers to the kinetic energy and potential energy possessed by ocean surface waves, and its power generation principle is to convert the kinetic energy and potential energy of water into mechanical energy to drive a generator to generate electricity. However, at present, the technology for utilizing wave energy in China is not yet mature, and the output of wave energy is unstable and the utilization rate of energy output is relatively low. Summary of the Invention

[0004] The present invention provides a wave energy power generation control system and method to achieve stable output of wave energy and controlled output of maximum wave energy.

[0005] To achieve the above object, in a first aspect, the embodiments of the present invention provide a wave energy power generation control system, which includes: a wave energy capture device, a gas stable output module, a pneumatic conversion module, a generator, and an electric energy control module;

[0006] The wave energy capture device is used to convert wave energy into gas kinetic energy;

[0007] The gas stable output module is used to stably output the gas kinetic energy to the pneumatic conversion module;

[0008] The pneumatic conversion module is used to convert the pneumatic energy after stable output into mechanical energy;

[0009] The generator is used to convert the mechanical energy into electrical energy and output the electrical energy to the electrical energy control module;

[0010] The electrical energy control module is used to collect the cabin pressure of the wave energy capture device and the rotational speed of the generator in real time; and control the output of the electrical energy in the maximum energy mode based on the PID principle according to the cabin pressure and the rotational speed.

[0011] Optionally, the electrical energy control module includes an electrical energy control unit, a wave energy AC / DC unit, and a wave energy DC / AC unit;

[0012] The input end of the wave energy AC / DC unit is electrically connected to the output end of the generator; the control end of the wave energy AC / DC unit is electrically connected to the electrical energy control unit; the output end of the wave energy AC / DC unit is electrically connected to the input end of the wave energy DC / AC unit;

[0013] The electrical energy control unit is used to receive the cabin pressure of the wave energy capture device and the rotational speed of the generator in real time; and output a maximum electromagnetic torque control signal to the wave energy AC / DC unit based on the PID principle according to the cabin pressure, the target rotational speed, and the rotational speed;

[0014] The wave energy AC / DC unit is used to convert the AC electrical energy output by the generator into maximum DC electrical energy and output it to the wave energy DC / AC unit according to the maximum electromagnetic torque control signal;

[0015] The control end of the wave energy DC / AC unit is electrically connected to the electrical energy control unit; the output end of the wave energy DC / AC unit is connected to the grid through a power transmission cable;

[0016] The electrical energy control unit is further used to output a first start control instruction to the wave energy DC / AC unit;

[0017] The wave energy DC / AC unit is used to convert the maximum DC electrical energy into maximum AC electrical energy and output it to the grid under the first start control instruction.

[0018] Optionally, the system further includes: a photovoltaic module;

[0019] The electrical energy control module further includes: a photovoltaic DC / DC unit;

[0020] The photovoltaic module is electrically connected to the input end of the photovoltaic DC / DC unit; the output end of the photovoltaic DC / DC unit is electrically connected to the output end of the wave energy AC / DC unit; the control end of the photovoltaic DC / DC unit is electrically connected to the electric energy control unit;

[0021] The photovoltaic module is configured to output DC electric energy to the photovoltaic DC / DC unit;

[0022] The electric energy control unit is further configured to output a second start control instruction to the photovoltaic DC / DC unit;

[0023] The photovoltaic DC / DC unit is configured to, under the second start control instruction, perform voltage conversion on the DC electric energy and output it to the wave energy DC / AC unit.

[0024] Optionally, the gas stable output module includes a Roots blower; the pneumatic conversion module includes a pneumatic motor.

[0025] Optionally, the electric energy control module further includes: a bypass switch and a bypass load;

[0026] The electric energy control unit is electrically connected to the bypass switch; the input end of the bypass load is electrically connected to a voltage source; the output end of the bypass load is electrically connected to the input end of the wave energy AC / DC through the bypass switch;

[0027] The bypass switch is configured to open and close according to the switch control instruction output by the electric energy control switch so that the bypass load outputs electric energy to the wave energy AC / DC unit.

[0028] Optionally, the system further includes: a local AC load;

[0029] The electric energy control module further includes: an auxiliary power supply DC / AC;

[0030] The electric energy control unit is electrically connected to the auxiliary power supply DC / AC; the input end of the auxiliary power supply DC / AC is electrically connected to the output end of the wave energy AC / DC unit; the output end of the auxiliary power supply DC / AC is electrically connected to the local AC load;

[0031] The electric energy control unit is further configured to output a third start control instruction to the auxiliary power supply DC / AC;

[0032] The auxiliary power supply DC / AC is configured to, according to the third start control instruction, convert the maximum DC electricity output by the wave energy AC / DC unit into AC electricity and output it to the local AC load.

[0033] Optionally, the system further includes: a monitoring device, a first sensor and a second sensor;

[0034] The first sensor is electrically connected to the electric energy control unit and is configured to collect and transmit the operating parameters of the wave energy capture device to the electric energy control unit;

[0035] The second sensor is electrically connected to the electric energy control unit and is configured to collect and transmit the operating parameters of the generator to the electric energy control unit;

[0036] The monitoring device is electrically connected to the electric energy control unit and is configured to monitor the operating parameters of the wave energy capture device and the operating parameters of the generator; and output an alarm signal when the operating parameters of the wave energy capture device are greater than the first target operating parameters or the operating parameters of the generator are greater than the second target operating parameters.

[0037] Optionally, the generator includes a permanent magnet generator or a squirrel cage motor.

[0038] In a second aspect, an embodiment of the present invention further provides a wave energy power generation control method, which is applied to the wave energy power generation control system described in the first aspect above. The wave energy power generation control method includes:

[0039] Real-time collect the cabin pressure of the wave energy capture device and the rotational speed of the generator;

[0040] Control the electric energy output by the generator to be output in a maximum energy mode according to the cabin pressure and the rotational speed.

[0041] Optionally, controlling the electric energy output by the generator to be output in a maximum energy mode according to the cabin pressure and the rotational speed includes:

[0042] Determine the target rotational speed according to the cabin pressure;

[0043] Based on the PID control principle, output a maximum electromagnetic torque control signal according to the cabin pressure, the target rotational speed and the rotational speed so that the electric energy output by the generator is output in a maximum energy mode.

[0044] In an embodiment of the present invention, wave energy is converted into pneumatic energy by the wave energy capture device; the gas stable output module stably outputs the pneumatic energy to the pneumatic conversion module; the pneumatic conversion module converts the stably output pneumatic energy into mechanical energy; the generator converts the mechanical energy into electrical energy and outputs the electrical energy to the electrical energy control module; the electrical energy control module receives the cabin pressure of the wave energy capture device in real time and collects the rotational speed of the generator; and controls the output of the electrical energy in the maximum energy mode based on the PID principle according to the cabin pressure and the rotational speed, thereby realizing the stable output of wave energy and at the same time realizing the control output of the maximum wave energy. Description of the Drawings

[0045] Figure 1 is a schematic structural diagram of a wave energy power generation control system provided by an embodiment of the present invention;

[0046] Figure 2 is a schematic structural diagram of another wave energy power generation control system provided by an embodiment of the present invention;

[0047] Figure 3 is a schematic structural diagram of another wave energy power generation control system provided by an embodiment of the present invention;

[0048] Figure 4 is a schematic structural diagram of another wave energy power generation control system provided by an embodiment of the present invention;

[0049] Figure 5 is a schematic structural diagram of another wave energy power generation control system provided by an embodiment of the present invention;

[0050] Figure 6 is a schematic flow chart of a wave energy power generation control method provided by an embodiment of the present invention;

[0051] Figure 7 is a schematic flow chart of another wave energy power generation control method provided by an embodiment of the present invention;

[0052] Figure 8 is an internal block diagram of the PID control principle provided by an embodiment of the present invention. Detailed Embodiments

[0053] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention and not for limiting the present invention. In addition, it should be noted that only parts related to the present invention rather than all structures are shown in the drawings for the convenience of description.

[0054] Figure 1 is a schematic structural diagram of a wave energy power generation control system provided by an embodiment of the present invention, asFigure 1 As shown in the figure, the system includes: a wave energy capture device 10, a gas stable output module 20, a pneumatic conversion module 30, a generator 40, and an electric energy control module 50; the wave energy capture device 10 is used to convert wave energy into pneumatic energy; the gas stable output module 20 is used to stably output the pneumatic energy to the pneumatic conversion module 30; the pneumatic conversion module 30 is used to convert the stably output pneumatic energy into mechanical energy; the generator 40 is used to convert mechanical energy into electric energy and output the electric energy to the electric energy control module 50; the electric energy control module 50 is used to receive the cabin pressure of the wave energy capture device 10 in real time and collect the rotational speed of the generator 40; and control the output of electric energy in the maximum energy mode based on the PID principle according to the cabin pressure and the rotational speed.

[0055] Among them, the gas stable output module 20 is a module for stably outputting the gas rotational speed; the gas stable output module 20 may include a Roots blower; as a positive displacement blower, the working principle of the Roots blower 20 is mainly based on the relative movement between two impellers and the small gap between them and the housing to achieve the compression and delivery of gas; due to the internal structural principle of the Roots blower 20, the rotational speed of the gas output by the Roots blower 20 is stable; the stably output gas is output to the pneumatic conversion module 30;

[0056] The pneumatic conversion module 30 is a module for converting the stably output pneumatic energy into mechanical energy; the pneumatic conversion module 30 may be a pneumatic motor; a pneumatic motor is a device that converts the pressure energy of compressed gas into rotational mechanical energy. Specifically: the pneumatic motor needs to be connected to the compressed gas output end of the gas output module 20, and the compressed air is transported through a pipeline to the air inlet of the pneumatic motor and enters its cylinder interior; there is a piston inside the cylinder, and when the compressed air enters the cylinder, the piston is subjected to a thrust force and starts to move; the piston movement pushes the gas in the cylinder to expand, and after the gas in the cylinder expands, the expansion energy of the gas is converted into rotational motion through the connecting rod rotating shaft inside it; the connecting rod rotating shaft is connected to the rotor shaft of the generator 40, thereby driving the generator 40 to work; since the rotational speed of the gas output by the gas stable output module 20 is stable, the mechanical energy output by the pneumatic conversion module 30 is stable; compared with directly using a turbine in the prior art, in this embodiment, by using the combination of the gas stable output module 20 and the pneumatic conversion module 30, the conversion of wave energy into stable mechanical energy output to the generator 40 is achieved;

[0057] The generator 40 can convert mechanical energy into electric energy and output it to the electric energy control module 50; exemplarily, the generator 40 includes a permanent magnet generator or a squirrel cage motor; the specific type of the generator 40 is not limited in this embodiment.

[0058] The electric energy control module 50 can achieve the maximum wave energy output control; specifically, the electric energy control module 50 receives the cabin pressure of the wave energy capture device 10 in real time and acquires the rotational speed of the generator 40; and based on the PID principle, controls the electric energy output by the generator 40 to be output in the maximum energy mode according to the cabin pressure and the rotational speed, so as to achieve the maximum output of wave energy.

[0059] In this embodiment, the wave energy capture device 10 converts wave energy into pneumatic energy; the gas stable output module 20 stably outputs the pneumatic energy to the pneumatic conversion module 30; the pneumatic conversion module 30 converts the stably output pneumatic energy into mechanical energy; the generator 40 converts the mechanical energy into electric energy and outputs the electric energy to the electric energy control module 50; the electric energy control module 50 controls the electric energy to be output in the maximum energy mode according to the cabin pressure and the rotational speed, thus realizing the stable output of wave energy and at the same time realizing the control output of the maximum wave energy.

[0060] Optionally, on the basis of the above embodiment, the wave energy power generation control system is further refined. Figure 2 It is a schematic structural diagram of another wave energy power generation control system provided by an embodiment of the present invention; as Figure 2 shown, the electric energy control module 50 includes an electric energy control unit 51, a wave energy AC / DC unit 52 and a wave energy DC / AC unit 53;

[0061] The input end of the wave energy AC / DC unit 52 is electrically connected to the output end of the generator 40; the control end of the wave energy AC / DC unit 52 is electrically connected to the electric energy control unit 51; the output end of the wave energy AC / DC unit 52 is electrically connected to the input end of the wave energy DC / AC unit 53;

[0062] The electric energy control unit 51 is configured to receive the cabin pressure of the wave energy capture device 10 in real time and acquire the rotational speed of the generator 40; and based on the PID principle, output a maximum electromagnetic torque control signal to the wave energy AC / DC unit 52 according to the cabin pressure, the target rotational speed and the rotational speed.

[0063] The wave energy AC / DC unit 52 is configured to convert the AC electric energy output by the generator 40 into maximum DC electric energy and output it to the wave energy DC / AC unit 53 according to the maximum electromagnetic torque control signal.

[0064] The control end of the wave energy DC / AC unit 53 is electrically connected to the electric energy control unit 51; the output end of the wave energy DC / AC unit 53 is connected to the grid through a power transmission cable.

[0065] The electric energy control unit 51 is further configured to output a first start control instruction to the wave energy DC / AC unit 53.

[0066] The wave energy DC / AC unit 53 is used to convert the maximum DC electrical energy into the maximum AC electrical energy for grid connection output under the first start control instruction.

[0067] Specifically, according to the cabin pressure, the target rotational speed, and the rotational speed, the maximum electromagnetic torque control signal is output to the wave energy AC / DC unit 52; it can be achieved through the following steps:

[0068]

[0069] Wherein, P r is the cabin pressure, n t is the generator rotational speed, is the generator target rotational speed, K is the gain, and its value is 1 < K < 100. K p is the proportionality coefficient, and its value is 1 < K p < 1000, K i is the integral coefficient, and its value is 0.1 < K i < 10, is the maximum electromagnetic torque control signal output by the electrical energy control unit 51;

[0070] The electrical energy control unit 51 outputs the maximum electromagnetic torque control signal to the wave energy AC / DC unit 52; the wave energy AC / DC unit 52 can be a switching type AC / DC unit; the wave energy AC / DC unit 52 thus converts the AC electrical energy output by the generator 40 into the maximum DC electrical energy and outputs it to the wave energy DC / AC unit 53 according to the maximum electromagnetic torque control signal; the wave energy DC / AC unit 53 can be a half-wave rectification unit or a full-wave rectification unit. The wave energy DC / AC unit 53 then converts the maximum DC electrical energy into the maximum AC electrical energy for grid connection output under the start control instruction of the electrical energy control unit 51.

[0071] It can be understood that in this embodiment, the wave energy AC / DC unit 52 and the wave energy DC / AC unit 53 play a role in electrical energy conversion in the electrical energy control module 50; the wave energy AC / DC unit 52 and the wave energy DC / AC unit 53 can also be replaced by other electrical energy conversion modules, such as a wave energy AC / AC unit; in this way, the maximum electromagnetic torque control signal is output to the wave energy AC / AC unit, and the wave energy AC / AC unit directly converts the AC electrical energy output by the generator 40 into the maximum AC electrical energy for grid connection output.

[0072] Optionally, Figure 3 is a schematic structural diagram of another wave energy power generation control system provided by an embodiment of the present invention; as Figure 3As shown, the system further includes: a photovoltaic module 60; the electric energy control module 50 further includes: a photovoltaic DC / DC unit 54; the photovoltaic module 60 is electrically connected to the input end of the photovoltaic DC / DC unit 54; the output end of the photovoltaic DC / DC unit 54 is electrically connected to the output end of the wave energy AC / DC unit 53; the control end of the photovoltaic DC / DC unit 54 is electrically connected to the electric energy control unit 51; the photovoltaic module 60 is used to output DC electric energy to the photovoltaic DC / DC unit 54; the electric energy control unit 51 is further used to output a second start control instruction to the photovoltaic DC / DC unit; 54 the photovoltaic DC / DC unit 54 is used to convert and process the DC electric energy and output it to the wave energy DC / AC unit 53 under the second start control instruction.

[0073] Among them, in some special scenarios without wave energy, the wave energy capture device 10 cannot convert wave energy into pneumatic energy; the photovoltaic module 60 can collect solar energy and convert the solar energy into DC electric energy and output it to the photovoltaic DC / DC unit 54 in the electric energy control module 50, and the photovoltaic DC / DC unit 54 can convert and output the DC electric energy to the wave energy DC / AC unit 53, so as not to affect the normal grid connection output.

[0074] Optionally, Figure 4 is a schematic structural diagram of another wave energy power generation control system provided by an embodiment of the present invention; as Figure 4 shown, the electric energy control module 50 further includes: a bypass switch 55 and a bypass load 56; the electric energy control unit 51 is electrically connected to the bypass switch 55; the input end of the bypass load 56 is electrically connected to the voltage source VCC; the output end of the bypass load 56 is electrically connected to the input end of the wave energy AC / DC 52 through the bypass switch 55; the bypass switch 55 is used to open and close according to the switch control instruction output by the electric energy control switch 51 so that the bypass load 56 outputs electric energy to the wave energy AC / DC unit 52.

[0075] Among them, in some emergency working conditions, such as special working conditions on rainy days and working conditions without waves; the bypass switch 55 opens and closes according to the switch control instruction output by the electric energy control switch 51, so that the bypass load 56 outputs electric energy to the wave energy AC / DC unit 52, and at the same time the electric energy control unit 51 outputs a maximum electromagnetic torque control signal to the wave energy AC / DC unit 52; the wave energy AC / DC unit 52 thus converts the electric energy output by the bypass load 56 into the maximum DC electric energy and outputs it to the wave energy DC / AC unit 53 according to the maximum electromagnetic torque control signal; the wave energy DC / AC unit 53 then converts the maximum DC electric energy into the maximum AC electric energy and outputs it to the grid under the first start control instruction of the electric energy control unit 51.

[0076] Optionally, Figure 5 is a schematic structural diagram of another wave energy power generation control system provided by an embodiment of the present invention; asFigure 5 As shown, the system further includes: a local AC load 70; the power control module 50 further includes: an auxiliary power supply DC / AC 57;

[0077] The power control unit 51 is electrically connected to the auxiliary power supply DC / AC 57; the input end of the auxiliary power supply DC / AC 57 is electrically connected to the output end of the wave energy AC / DC 52 unit; the output end of the auxiliary power supply DC / AC 57 is electrically connected to the local AC load 70; the power control unit 51 is further configured to output a third start control instruction to the auxiliary power supply DC / AC 57; the auxiliary power supply DC / AC 57 is configured to convert the maximum direct current output by the wave energy AC / DC unit 52 into alternating current according to the third start control instruction and output it to the local AC load 70.

[0078] Wherein, when there is a power supply demand for the local AC load, the power control unit 51 outputs a maximum electromagnetic torque control signal to the wave energy AC / DC unit 52; the wave energy AC / DC unit 52 then converts the AC power output by the generator 40 into the maximum direct current according to the maximum electromagnetic torque control signal and outputs it to the auxiliary power supply DC / AC 57, and the auxiliary power supply DC / AC 57 converts the maximum direct current into alternating current and outputs it to the local AC load 70 under the third start control instruction output by the power control unit 51, thus meeting the power supply demand of the local AC load 70 while realizing AC grid connection.

[0079] Optionally, continuing to refer to Figure 5 , the system further includes: a monitoring device 80, a first sensor 90 and a second sensor 100; the first sensor 80 is electrically connected to the power control unit 51 and is configured to collect and send the operating parameters of the wave energy capture device 10 to the power control unit 51; the second sensor 100 is electrically connected to the power control unit 51 and is configured to collect and send the operating parameters of the generator 40 to the power control unit 51;

[0080] The monitoring device 80 is electrically connected to the power control unit 51 and is configured to monitor the operating parameters of the wave energy capture device 10 and the operating parameters of the generator 40; and output an alarm signal when the operating parameters of the wave energy capture device 10 are greater than the first target operating parameters, or the operating parameters of the generator 40 are greater than the second target operating parameters.

[0081] Among them, the monitoring device 80 is a background monitoring device; the first sensor 90 can collect the operating parameters of the wave energy capture device 10 in real time, such as the cabin pressure, the cabin azimuth angle, and the cabin inclination angle, and send each operating parameter to the electric energy control unit 51; the second sensor 100 collects the motion parameters of the generator 40, such as the output current parameter, the output voltage parameter, and the power generation power parameter, and sends the motion parameters of the generator 40 to the electric energy control unit 51. In this way, the monitoring device 80 can monitor the operating parameters of the wave energy capture device 10 and the motion parameters of the generator 40 through the electric energy control unit 51, and output an alarm signal when the operating parameter of the wave energy capture device 10 is greater than the first target operating parameter, or the operating parameter of the generator is greater than the second target operating parameter, thus ensuring the operating reliability during the wave energy power generation process.

[0082] In some embodiments, the monitoring device 80 can also receive the control parameters input by the user. The control parameters are input to the electric energy control unit 51, so as to realize remote man-machine interaction.

[0083] Based on the same inventive concept, the embodiment of the present invention also provides a wave energy power generation control method, which is executed by the electric energy control unit; this method is applied to the wave energy power generation control system described in the above embodiment. Figure 6 It is a schematic flowchart of a wave energy power generation control method provided by an embodiment of the present invention; as Figure 6 shown, this wave energy power generation control method includes the following steps:

[0084] S110. Collect the cabin pressure of the wave energy capture device in real time and collect the rotational speed of the generator.

[0085] S120. Control the electric energy output by the generator to be output in the maximum energy mode according to the cabin pressure and the rotational speed.

[0086] In this embodiment, controlling the electric energy to be output in the maximum energy mode according to the cabin pressure and the rotational speed realizes the control output of the maximum wave energy.

[0087] Optionally, on the basis of the above method embodiment, it is further refined. Figure 7 It is a schematic flowchart of another wave energy power generation control method provided by an embodiment of the present invention; Figure 8 It is a PID control principle block diagram provided by an embodiment of the present invention; as Figures 7 - 8 shown, this wave energy power generation control method includes the following steps:

[0088] S210. Collect the cabin pressure of the wave energy capture device in real time and collect the rotational speed of the generator.

[0089] S220. Determine the target rotational speed according to the cabin pressure.

[0090] S230. Based on the PID control principle, according to the cabin pressure, the target rotational speed, and the rotational speed, output the maximum electromagnetic torque control signal so that the electric energy output by the generator is output in the maximum energy mode.

[0091] Refer to Figure 8 , specifically, outputting the maximum electromagnetic torque control signal according to the cabin pressure, the target rotational speed, and the rotational speed is as follows:

[0092]

[0093] Among them, P r is the cabin pressure, n t is the rotational speed of the generator, is the target rotational speed of the generator, K is the gain, and its value is 1 < K < 100. K p is the proportionality coefficient, and its value is 1 < K p < 1000, K i is the integral coefficient, and its value is 0.1 < K i < 10, is the maximum electromagnetic torque control signal output by the electric energy control unit 51; it can be understood that the maximum electromagnetic torque control signal can be a vector control signal; in this way, the electric energy output by the generator is output in the maximum energy mode, realizing the output control of the maximum wave energy.

[0094] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A wave energy power generation control system, characterized in that Comprising: A wave energy capture device, a gas stable output module, a pneumatic conversion module, a generator, and an electric energy control module; The wave energy capture device is used to convert wave energy into pneumatic energy; The gas stable output module is used to stably output the pneumatic energy to the pneumatic conversion module; The pneumatic conversion module is used to convert the pneumatic energy after stable output into mechanical energy; The generator is used to convert the mechanical energy into electric energy and output the electric energy to the electric energy control module; The electric energy control module is used to collect the cabin pressure of the wave energy capture device in real time and collect the rotational speed of the generator; And control the output of the electric energy in the maximum energy mode based on the PID principle according to the cabin pressure and the rotational speed.

2. The wave energy power generation control system according to claim 1, wherein The electric energy control module includes an electric energy control unit, a wave energy AC / DC unit, and a wave energy DC / AC unit; The input end of the wave energy AC / DC unit is electrically connected to the output end of the generator; the control end of the wave energy AC / DC unit is electrically connected to the electric energy control unit; the output end of the wave energy AC / DC unit is electrically connected to the input end of the wave energy DC / AC unit; The electric energy control unit is used to receive the cabin pressure of the wave energy capture device in real time and collect the rotational speed of the generator; And output a maximum electromagnetic torque control signal to the wave energy AC / DC unit based on the PID principle according to the cabin pressure, the target rotational speed, and the rotational speed; The wave energy AC / DC unit is used to convert the AC electric energy output by the generator into maximum DC electric energy according to the maximum electromagnetic torque control signal and output it to the wave energy DC / AC unit; The control end of the wave energy DC / AC unit is electrically connected to the electric energy control unit; the output end of the wave energy DC / AC unit is connected to the grid through a transmission cable; The electric energy control unit is further used to output a first start control instruction to the wave energy DC / AC unit; The wave energy DC / AC unit is used to convert the maximum DC electric energy into maximum AC electric energy and output it to the grid under the first start control instruction.

3. The wave energy power generation control system according to claim 2, wherein, Further comprising: A photovoltaic module; The electric energy control module further includes: a photovoltaic DC / DC unit; The photovoltaic module is electrically connected to the input end of the photovoltaic DC / DC unit; the output end of the photovoltaic DC / DC unit is electrically connected to the output end of the wave energy AC / DC unit; the control end of the photovoltaic DC / DC unit is electrically connected to the electric energy control unit; The photovoltaic module is used to output DC electric energy to the photovoltaic DC / DC unit; The electric energy control unit is further used to output a second start control instruction to the photovoltaic DC / DC unit; The photovoltaic DC / DC unit is used to perform voltage transformation processing on the DC electric energy and output it to the wave energy DC / AC unit under the second start control instruction.

4. The wave energy power generation control system according to claim 1, characterized in that, The gas stable output module includes a Roots blower; the pneumatic conversion module includes a pneumatic motor.

5. The wave energy power generation control system according to claim 2, characterized in that, The electric energy control module further includes: a bypass switch and a bypass load; The electric energy control unit is electrically connected to the bypass switch; the input end of the bypass load is electrically connected to a voltage source; the output end of the bypass load is electrically connected to the input end of the wave energy AC / DC through the bypass switch; The bypass switch is used to open and close according to a switch control instruction output by the electric energy control switch so that the bypass load outputs electric energy to the wave energy AC / DC unit.

6. The wave energy power generation control system according to claim 2, wherein It further includes: A local AC load; The electric energy control module further includes: an auxiliary power supply DC / AC; The electric energy control unit is electrically connected to the auxiliary power supply DC / AC; the input end of the auxiliary power supply DC / AC is electrically connected to the output end of the wave energy AC / DC unit; the output end of the auxiliary power supply DC / AC is electrically connected to the local AC load; The electric energy control unit is further configured to output a third start control instruction to the auxiliary power supply DC / AC; The auxiliary power supply DC / AC is used to convert the maximum direct current output by the wave energy AC / DC unit into alternating current according to the third start control instruction and output it to the local AC load.

7. The wave energy power generation control system according to claim 2, wherein It further includes: A monitoring device, a first sensor and a second sensor; The first sensor is electrically connected to the electric energy control unit and is used to collect and send the operating parameters of the wave energy capture device to the electric energy control unit; The second sensor is electrically connected to the electric energy control unit and is used to collect and send the operating parameters of the generator to the electric energy control unit; The monitoring device is electrically connected to the electric energy control unit and is used to monitor the operating parameters of the wave energy capture device and the operating parameters of the generator; and output an alarm signal when the operating parameters of the wave energy capture device are greater than the first target operating parameters or the operating parameters of the generator are greater than the second target operating parameters.

8. The wave energy power generation control system according to claim 1, wherein The generator includes a permanent magnet generator or a squirrel cage motor.

9. A wave energy power generation control method, characterized in that Applied to the wave energy power generation control system according to any one of claims 1-8 above, the wave energy power generation control method includes: Real-time collecting the cabin pressure of the wave energy capture device and collecting the rotational speed of the generator; Controlling the electric energy output by the generator to be output in a maximum energy mode according to the cabin pressure and the rotational speed.

10. The wave energy power generation control method according to claim 9, wherein Controlling the electric energy output by the generator to be output in a maximum energy mode according to the cabin pressure and the rotational speed includes: Determining a target rotational speed according to the cabin pressure; Based on the PID control principle, outputting a maximum electromagnetic torque control signal according to the cabin pressure, the target rotational speed and the rotational speed so that the electric energy output by the generator is output in a maximum energy mode.

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