Wind power generation and flexible thin-film solar power generation device with de-icing function

Abstract

The present invention discloses a wind power generation and flexible thin-film solar power generation device with de-icing function, which mainly includes a wind power generation subsystem, a flexible thin-film solar power generation subsystem, an energy storage and heating system, an electric energy transmission system and a control system. The wind power generation system adopts the three-blade horizontal axis type that is currently more commonly used in the industry. The solar power generation subsystem adopts the new, flexible thin-film solar cell type that has developed rapidly in recent years. The flexible thin-film solar cell is attached to the leading edge of the blade of the wind power generation subsystem. The wind power generation subsystem and the flexible thin-film solar power generation subsystem share a set of electric energy conversion and transmission equipment to realize the combined power generation of wind and light energy, which can fully tap the clean and efficient renewable resources of the wind farm, improve the utilization rate of wind and light renewable resources per unit space, increase the power generation hours and power generation of the equipment, reduce construction costs and maintenance costs, and increase the comprehensive economic benefits of the wind farm.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation and solar power generation, and in particular to a wind power generation and flexible thin-film solar power combined power generation device with clean low-carbon blade deicing function. Background Art

[0002] my country is one of the few countries in the world that uses coal as its main energy source. For a long time, this coal-based energy structure and single energy consumption model have brought serious environmental pollution. The inexhaustible nature of renewable energy determines its important position in the future energy structure. my country's active development and utilization of renewable energy such as wind energy, solar energy, nuclear power, and ocean energy is an inevitable choice for realizing my country's energy strategy for sustainable economic and social development.

[0003] my country's wind power has experienced rapid development for 10 years and has become the third largest power source in China after thermal power and hydropower. As of 2018, the country's cumulative installed capacity reached 210 million kilowatts. At present, wind farms are facing the pressure of grid parity competition. In the case of widespread wind power curtailment and power rationing, how to increase the number of wind power generation hours, reduce the number of unit shutdowns, increase power generation, reduce construction costs, and improve the profitability of enterprises are currently urgent problems to be solved.

[0004] The abundant wind resources are basically distributed in high-cold areas and coastal areas with high humidity, and the environment is extremely harsh. When a wind turbine encounters humid air, rain, frost, snow, and especially supercooled water droplets under low temperature conditions, its components will freeze. Blade icing will have a certain impact on the wind farm, unit operation and personnel safety, reduce power generation efficiency, increase operating load and noise, and even endanger the safety of wind turbines and on-site maintenance personnel. Therefore, blade anti-icing and deicing work is particularly important. At present, there are two main ways to de-ice the fan blades. One is manual deicing, that is, high-altitude operation with the help of an operating platform and deicing tools. This method is inefficient and has a high operating risk factor, and is rarely used in production. The other is electric heating deicing, where a conductive device such as a heating wire is attached to the inside of the blade. When the blade is frozen, power is turned on to increase the internal temperature of the blade, and the internal heat is transferred to the outside of the blade using the principle of thermal balance. However, this method requires the addition of an additional circuit to provide electrical energy, which increases the system cost and the complexity of the design. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a wind power generation and flexible thin-film solar combined power generation device with clean and low-carbon blade deicing function, which shares a set of wind and photovoltaic energy transmission systems, provides an electric energy supply solution for preventing wind turbine blades from freezing or deicing wind turbine blades after freezing, reduces development costs, and at the same time utilizes the flexible, convenient, fast and clean and low-carbon characteristics of photovoltaic power generation.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is a wind power generation and flexible thin-film solar energy combined power generation device with de-icing function, including a wind power generation subsystem, a flexible thin-film solar power generation subsystem, an energy storage and heating system and an electric energy transmission system; wherein the flexible thin-film solar power generation subsystem includes a flexible thin-film solar cell panel, which is attached to the leading edge of the fan blade of the wind power generation subsystem; the energy storage and heating system includes a lead-acid battery energy storage unit and a plurality of heating units; a DC transmission line is buried inside the blade, and passes through the blade to connect the flexible thin-film solar cell panel with the lead-acid battery energy storage unit and the electric energy transmission system respectively, a relay is provided in the output circuit of the flexible thin-film solar cell panel, the output port of the lead-acid battery energy storage unit is connected to the heating unit, and the heating unit is attached to the inside of the fan blade.

[0007] The flexible thin-film solar panel is attached to the outside of the wind turbine blade around 360 degrees. The length of the flexible thin-film solar panel accounts for 20% to 40% of the total length of the wind turbine blade, and the thickness is 2 mm.

[0008] It also includes a control system, which includes a remote control unit, an industrial computer, a fan controller and a temperature and humidity sensor. One I / O port of the fan controller is connected to the temperature and humidity sensor, and another I / O port of the fan controller is connected to the relay; the fan controller is connected to the industrial computer, and the industrial computer is connected to the remote control unit.

[0009] The power transmission system includes an inverter, a transformer and a cable. The input end of the inverter is connected to the flexible thin-film solar power generation subsystem through a DC transmission line. The back end of the inverter is connected to the transformer. The output end of the transformer is connected to the power grid through a collector line and a booster station.

[0010] The heating unit comprises a resistance wire, an insulating layer, a heat conducting layer and a heat insulating layer. The outer side of the resistance wire is wrapped with an insulating layer, a heat conducting layer is arranged between the resistance wire and the inner wall of the blade, and a heat insulating layer is arranged on the side of the resistance wire away from the inner wall of the blade.

[0011] The heating unit also includes a temperature sensor, which is connected to an input end of the controller.

[0012] The wind turbine subsystem includes blades, a rotating shaft, a gearbox, a generator, a nacelle and a tower; wherein the rotating shaft, the gearbox and the generator are installed in the nacelle, the nacelle is arranged on the top of the tower, the driven end of the rotating shaft is connected to the input end of the gearbox, the active end of the rotating shaft is connected to the blades, and the output end of the gearbox is connected to the input end of the generator.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects: the present invention sets up a flexible thin-film solar power generation subsystem, and its flexible thin-film solar cell panel can be closely attached to the surface of the blade, and the DC transmission line passes through the inside of the blade, which has little impact on the blade; multiple heating units are set inside the blade, and when the external environment reaches the freezing condition, the heating unit can be turned on to heat the blade to melt the ice, and the electric energy generated by the flexible thin-film solar power generation subsystem is stored in the lead-acid battery energy storage unit in time, making full use of the unit volume utilization space of renewable energy, increasing the number of power generation hours and the power generation per unit area, eliminating the trouble of photovoltaic land acquisition, and sharing a set of wind and photovoltaic energy transmission systems, reducing development costs; at the same time, the flexible, convenient, fast, clean and low-carbon characteristics of photovoltaic power generation are utilized to provide an electric energy supply solution for preventing wind turbine blades from freezing or deicing wind turbine blades after freezing.

[0014] Furthermore, a flexible thin-film solar panel that occupies 20% to 40% of the total length of the wind turbine blade, has a thickness of 2 mm, and is 360° tightly attached to the outer side of the leading edge of the wind turbine blade can ensure the power supply of the heating unit without using other additional power sources.

[0015] Furthermore, by connecting the temperature and humidity sensors to the control system, real-time dynamic remote monitoring of the fan's surrounding environment and blade temperature and humidity can be achieved, providing convenience for remote automatic control of the heating unit; real-time monitoring can also prevent the heating temperature from being too high, thereby avoiding affecting the safe operation of the blades.

[0016] Furthermore, an insulating layer, a heat-conducting layer and a heat-insulating layer are provided in the heating unit, which is safer and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the combined power generation of wind power generation and flexible thin-film solar cells of the present invention.

[0018] Figure 2 Schematic diagram of the control system of the deicing system of the present invention. DETAILED DESCRIPTION

[0019] See attached Figure 1 The present invention designs a wind power generation and flexible thin-film solar power generation device with clean and low-carbon blade deicing function, including a wind power generation subsystem 1, a flexible thin-film solar power generation subsystem 2, an energy storage and heating system 3, an electric energy transmission system 4 and a control system 5; the flexible thin-film solar cell panel 21 is tightly attached to the leading edge of the wind turbine blade of the wind power generation subsystem 1, and the wind power generation subsystem 1 and the flexible thin-film solar power generation subsystem 2 share a set of electric energy conversion and transmission equipment to realize the combined power generation of wind and light energy.

[0020] Specifically, the wind power generation subsystem 1 includes blades 11, a rotating shaft 12, a gearbox 13, a generator 14, a nacelle 15 and a tower 16; wherein the rotating shaft 12, the gearbox 13 and the generator 14 are installed in the nacelle 15, the nacelle 15 is arranged on the top of the tower 16, and the tower 16 plays a supporting role. The driven end of the rotating shaft 12 is connected to the input end of the gearbox 13, the active end of the rotating shaft 12 is connected to the blades 11, and the output end of the gearbox 13 is connected to the input end of the generator 14. When working, the wind energy drives the blades 11 to rotate, and the rotational mechanical energy of the blades 11 is transmitted to the front rotating shaft of the generator 14 through the rotating shaft 12 and the gearbox 13, thereby driving the generator 14 to generate electricity, and the generated electricity is transmitted to the outside through the power transmission system 4 connected to the generator 14.

[0021] The flexible thin-film solar power generation subsystem 2 includes a flexible thin-film solar panel 21 and a DC transmission line 22, wherein the flexible thin-film solar panel 21 is adsorbed on the outer leading edge of the wind turbine blade 11, and accounts for 20% of the total length of the blade according to the design power. The DC transmission line 22 is buried inside the blade and passes through the blade through the entire wind turbine cabin 15. The two ends of the DC transmission line 22 are respectively connected to the flexible thin-film solar panel 21 and the inverter 41 of the power transmission system 4. The inverter 41 can convert the DC power generated by the flexible thin-film solar panel 21 into an AC power form consistent with the output of the wind turbine generator, and transmit it to the outside through the shared transformer 42 and the cable 43. A relay 23 is installed at the output port of the thin-film solar panel 21, and an electric power line connected to the energy storage and heating system 3 is added. The current transmission line can be switched at any time through the relay 23, and the input current can be provided to the energy storage and heating system 3 at any time.

[0022] The energy storage and heating system 3 includes a lead-acid battery energy storage unit 31 and multiple heating units 32. When the relay 23 switches the circuit, the flexible thin-film photovoltaic panel 21 is connected to the input end of the lead-acid battery energy storage unit 31 to charge it, and the output port of the lead-acid battery energy storage unit 31 is connected to the heating unit 32 to provide electrical energy for the heating unit. The heating unit 32 includes a resistance wire, an insulating layer, a heat conductive layer and a heat insulating layer. The heating unit 32 is attached to the inside of the fan blade 11, and the dissipated heat is conducted to the blade surface through the inside of the blade, which is used for de-icing after the blade is frozen.

[0023] The power transmission system 4 includes an inverter 41, a transformer 42 and a cable 43. The output end of the flexible thin-film solar power generation subsystem 2 is connected to the input end of the inverter 41, and its output power is integrated into the same form of power as that generated by the wind power generation subsystem generator 14, and then connected to the input end of the transformer 42. The transformer 42 integrates the alternating current and transmits it to the power grid through the cable 43.

[0024] See attached Figure 2The control system includes a remote control unit 51, an industrial computer 52, a fan controller 53, a temperature and humidity sensor 54, and wind speed, wind direction, rotation speed, and power sensors for normal operation of the fan. On the one hand, the fan controller 53 is connected to the industrial computer 52, and the industrial computer 52 is connected to the remote control unit 51, and can receive the start and stop instructions from the remote control room at any time; on the other hand, one I / O port of the fan controller 53 is connected to the temperature and humidity sensor 54 to receive the temperature and humidity signals around the fan, and another I / O port is connected to the relay 23 to control the switching of the relay 23; the wind power generation controller 53 receives the sensor information of the wind power generation subsystem 1 monitoring the wind speed, generator speed, and power parameters and responds according to the control strategy.

[0025] The working principle of the present invention is:

[0026] When the fan controller 53 receives the wind speed, generator speed and power parameter information, it adjusts the operation mode of the fan to achieve the best operation state, obtain the highest capture efficiency and output power steadily. Secondly, the fan controller 53 receives environmental information such as the temperature outside the cabin and monitors the surrounding working environment state.

[0027] The flexible thin-film solar panel 21 is attached to the leading edge of the wind turbine blade 11, and absorbs solar energy efficiently as the blade rotates, and converts it into direct current, which is transmitted to the front end of the inverter in the wind turbine cabin along the direct current line to realize photovoltaic power generation function.

[0028] When the fan controller 53 detects the temperature sensor information in real time, when the temperature is high (greater than 0 degrees), the blades will not be covered with ice. At this time, the fan controller does not switch the relay 23, and the flexible thin-film solar power generation subsystem 2 can generate electricity at any time. When the fan controller 53 detects that the temperature of the temperature sensor information is low (less than 0 degrees), the fan controller connects to the I / O port of the relay 23 to issue a command to switch the line, and the direct current generated by the flexible thin-film solar power generation subsystem 2 is used to charge the lead storage battery unit 31, and the lead storage battery unit 31 provides power to the heating unit 32. The heat generated by the heating unit 32 can remove the ice generated by the blades due to cold weather.

Claims

1. A wind power generation and flexible thin-film solar power generation device with de-icing function, characterized in that: The invention comprises a wind power generation subsystem (1), a flexible thin-film solar power generation subsystem (2), an energy storage and heating system (3), and an electric energy transmission system (4); wherein the flexible thin-film solar power generation subsystem (2) comprises a flexible thin-film solar panel (21), and the flexible thin-film solar panel (21) is attached to the leading edge of a wind turbine blade of the wind power generation subsystem (1); the energy storage and heating system (3) comprises a lead-acid battery energy storage unit (31) and a plurality of heating units (32); a direct current transmission line (22) is buried inside the blade and passes through The flexible thin-film solar panel (21) is connected to the lead-acid battery energy storage unit (31) and the electric energy transmission system (4) through the blade, a relay (23) is provided in the output circuit of the flexible thin-film solar panel (21), the output port of the lead-acid battery energy storage unit (31) is connected to the heating unit (32), and the heating unit (32) is attached to the inside of the blade (11); the flexible thin-film solar panel (21) is attached to the outside of the wind turbine blade around 360 degrees, and the length of the flexible thin-film solar panel (21) accounts for 10% of the total length of the wind turbine blade The fan controller (53) is 20% to 40% longer than the industrial computer (52) and 2 mm thick; the control system (5) includes a remote control unit (51), an industrial computer (52), a fan controller (53) and a temperature and humidity sensor (54); one I / O port of the fan controller (53) is connected to the temperature and humidity sensor (54); another I / O port of the fan controller (53) is connected to the relay (23); the fan controller (53) is connected to the industrial computer (52), and the industrial computer (52) is connected to the remote control unit (51) The wind turbine generator system (1) comprises blades (11), a rotating shaft (12), a gear box (13), a generator (14), a nacelle (15) and a tower (16); wherein the rotating shaft (12), the gear box (13) and the generator (14) are installed in the nacelle (15), the nacelle (15) is arranged on the top of the tower (16), the driven end of the rotating shaft (12) is connected to the input end of the gear box (13), the active end of the rotating shaft (12) is connected to the blades (11), and the output end of the gear box (13) is connected to the input end of the generator (14).

2. The wind power generation and flexible thin-film solar energy combined power generation device with deicing function according to claim 1 is characterized in that: The electric energy transmission system (4) comprises an inverter (41), a transformer (42) and a cable (43); the input end of the inverter (41) is connected to the flexible thin-film solar power generation subsystem (2) via a DC transmission line (22); the rear end of the inverter (41) is connected to the transformer (42); and the output end of the transformer (42) is connected to the power grid via a collector line and a booster station.

3. The wind power generation and flexible thin-film solar energy combined power generation device with deicing function according to claim 1 is characterized in that: The heating unit (32) comprises a resistance wire, an insulating layer, a heat conducting layer and a heat insulating layer. The outer side of the resistance wire is wrapped with the insulating layer. A heat conducting layer is further provided between the resistance wire and the inner wall of the blade (11). The heat insulating layer is provided on the side of the resistance wire facing away from the inner wall of the blade (11).

4. The wind power generation and flexible thin-film solar energy combined power generation device with deicing function according to claim 3 is characterized in that: The heating unit (32) also includes a temperature sensor, which is connected to the input end of the controller.

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