CN215498291U

CN215498291U - Power control platform of wind power generation equipment

Info

Publication number: CN215498291U
Application number: CN202120775604.9U
Authority: CN
Inventors: 丁闵
Original assignee: Jinqilin Construction Technology Co ltd
Current assignee: Jinqilin New Energy Co ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2022-01-11
Anticipated expiration: 2031-04-15

Abstract

The utility model relates to the technical field of wind power generation, in particular to a power control platform of wind power generation equipment, which comprises a power control platform, wherein the power control platform comprises a wind turbine, a power grid, a main controller, a variable pitch control system, a wind speed sensor and a power sensor, and the functions of automatic variable pitch, change of a pitch angle and power control can be realized according to wind speed through the arranged power control platform, so that the efficiency maximization of the wind power generation is further realized.

Description

Power control platform of wind power generation equipment

Technical Field

The utility model relates to the technical field of wind power generation, in particular to a power control platform of wind power generation equipment.

Background

Wind power generation is characterized in that kinetic energy of wind is converted into electric energy, the wind energy is clean and pollution-free renewable energy, and is utilized by people for a long time, water pumping, surface grinding and the like are mainly realized through a windmill, the principle is that the kinetic energy of the wind is converted into mechanical kinetic energy, then the mechanical energy is converted into electric kinetic energy, namely wind power generation is realized, wind power is utilized to drive windmill blades to rotate, the rotating speed is increased through a speed increaser to promote the power generation of a generator, according to the windmill technology, the breeze speed (breeze degree) of about three meters per second can be used for starting power generation, and the wind power generation forms a hot tide in the world because the wind power generation does not need to use fuel, does not produce radiation or air pollution, is very environment-friendly, and has huge wind energy, so the wind power generation is increasingly valued by various countries in the world.

And the wind speed is a direct influence factor influencing the generating efficiency and the generating power of the wind power generation process.

Therefore, there is a need to design a power control platform for a wind power plant to solve the above-mentioned problems in the background art.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a power control platform for a wind power plant to solve the above-mentioned problems of the background art.

In order to achieve the purpose, the utility model provides the following technical scheme:

a power control platform of wind power generation equipment comprises a power control platform, wherein the power control platform comprises a wind turbine, a power grid, a main controller, a variable pitch control system, a wind speed sensor and a power controller, a gear box is fixedly installed at the inner center of the wind turbine, a double-fed asynchronous generator is fixedly installed on one side of the gear box and is in transmission connection with the gear box through a rotating shaft, blades are installed on the periphery of one end, away from the double-fed asynchronous generator, of the wind turbine, a variable pitch mechanism is installed between the blades and the wind turbine, a supporting machine barrel is fixedly installed at the center of the bottom of the wind turbine, a fixed base is fixedly installed at the bottom end of the supporting machine barrel, an AC-DC-AC bidirectional power converter is embedded and installed in the fixed base, an installation base is fixedly installed at the bottom of the fixed base, and the AC-DC-AC bidirectional power converter and the double-fed asynchronous generator are electrically connected through a wire, and a power controller is arranged between the AC-DC-AC bidirectional power converter and the main controller, and the power controller is electrically connected with the AC-DC-AC bidirectional power converter and the main controller through wires.

As a preferable scheme of the utility model, a power sensor is electrically connected between the power controller and the power grid through a lead, and an air speed sensor is wirelessly connected outside the main controller.

As a preferable scheme of the utility model, the variable pitch control system is electrically connected with the variable pitch mechanism, and the variable pitch control system is electrically connected with the main controller through a wire.

As the preferable scheme of the utility model, the variable pitch mechanism comprises a variable pitch bearing outer ring, a variable pitch bearing inner ring and a variable pitch driving rod.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the wind power generation system, the functions of automatic pitch variation, pitch angle change and power control can be realized according to the wind speed through the arranged power control platform, the efficiency maximization of wind power generation is further realized, the wind speed can be monitored in real time through the arranged wind speed sensor, if the wind speed runs below the rated wind speed, the maximum absorbed power is always kept, the pitch angle is not changed, if the wind speed runs above the rated wind speed, the wind speed sensor transmits an electric signal to the main controller, at the moment, the main controller starts the pitch variation control system, and meanwhile, the pitch variation control system starts the pitch variation mechanism to change the pitch angle, so that the windward position of the blades is changed, and the absorbed power is limited.

2. In the utility model, after the numerical value of the power sensor limited by the power grid is contrasted and referred by the arranged power controller, the AC-DC-AC bidirectional power converter is started to realize the energy exchange between the DC micro-power grid and the power grid, and meanwhile, the frequent actions of power electronic devices caused by the small-range fluctuation of the DC bus voltage are avoided, the stable operation of the micro-power grid system is ensured, and the system reliability is improved.

3. According to the utility model, the amplitude, frequency and phase angle of the rotor exciting current can be changed through the double-fed asynchronous generator, so that the purpose of adjusting the rotating speed, active power and reactive power of the generator is achieved, the efficiency of the generator set is improved, the functions of frequency stabilization and voltage stabilization are realized on a power grid, and the power generation quality is improved.

Drawings

FIG. 1 is a schematic diagram of a power control platform connection according to the present invention;

FIG. 2 is a schematic view of an external structure of a wind turbine according to the present invention;

FIG. 3 is a schematic view of an internal structure of a wind turbine according to the present invention;

in the figure: 1. a power control platform; 2. a wind turbine; 21. a gear case; 22. a doubly-fed asynchronous generator; 23. an AC-DC-AC bidirectional power converter; 24. a variable pitch mechanism; 25. a paddle; 26. a rotating shaft; 27. supporting the barrel; 28. a fixed base; 29. mounting a base; 3. a power grid; 4. A main controller; 5. a pitch control system; 6. a wind speed sensor; 7. a power controller; 71. A power sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

the power control platform of the wind power generation equipment comprises a power control platform 1, wherein the power control platform 1 comprises a wind turbine 2, a power grid 3, a main controller 4, a variable pitch control system 5, a wind speed sensor 6 and a power controller 7, a gear box 21 is fixedly installed at the inner center of the wind turbine 2, a double-fed asynchronous generator 22 is fixedly installed on one side of the gear box 21, the double-fed asynchronous generator 22 is in transmission connection with the gear box 21 through a rotating shaft 26, blades 25 are installed on the periphery of one end, far away from the double-fed asynchronous generator 22, of the wind turbine 2, and a variable pitch mechanism 24 is installed between the blades 25 and the wind turbine 2; a supporting cylinder 27 is fixedly installed at the bottom center of the wind turbine 2, a fixed base 28 is fixedly installed at the bottom end of the supporting cylinder 27, an alternating current-direct current-alternating current bidirectional power converter 23 is embedded and installed in the fixed base 28, and an installation base 29 is fixedly installed at the bottom of the fixed base 28; the AC-DC-AC bidirectional power converter 23 and the doubly-fed asynchronous generator 22 are electrically connected through a wire, the power controller 7 is arranged between the AC-DC-AC bidirectional power converter 23 and the main controller 4, meanwhile, the power controller 7, the AC-DC-AC bidirectional power converter 23 and the main controller 4 are electrically connected through wires, functions of automatic pitch changing, pitch angle changing and power control can be achieved through the arranged power control platform 1 according to wind speed, and efficiency maximization of wind power generation is achieved.

In the embodiment, referring to fig. 1, 2 and 3, a power sensor 71 is electrically connected between a power controller 7 and a power grid 3 through a wire, and a wind speed sensor 6 is wirelessly connected to the outside of a main controller 4, after the set power controller 7 is compared and referenced with the value of the power sensor 71 limited by the power grid 3, the ac-dc-ac bidirectional power converter 23 is started to realize energy exchange between a dc microgrid and the power grid, and meanwhile, frequent actions of power electronic devices caused by small-range fluctuation of dc bus voltage are avoided, stable operation of the microgrid system is ensured, and system reliability is improved, and meanwhile, the amplitude, frequency and phase angle of rotor exciting current can be changed through the set doubly-fed asynchronous generator 22, so that the purposes of adjusting the rotating speed, active power and reactive power of the generator set are achieved, that the efficiency of the generator set is improved, and the frequency stabilization of the power grid are achieved, The effect of steady voltage improves the power generation quality.

In an embodiment, referring to fig. 1, 2 and 3, a pitch control system 5 is electrically connected to a pitch mechanism 24, and the pitch control system 5 is electrically connected to a main controller 4 through a wire; the variable pitch mechanism 24 comprises a variable pitch bearing outer ring, a variable pitch bearing inner ring and a variable pitch driving rod, the wind speed can be monitored in real time through the arranged wind speed sensor 6, if the wind speed runs below rated wind speed, the absorbed power is always kept to be maximum, the pitch angle is not changed, if the wind speed runs above the rated wind speed, the wind speed sensor 6 can transmit an electric signal to the main controller 4, at the moment, the main controller 4 starts the variable pitch control system 5, and meanwhile, the variable pitch control system 5 starts the variable pitch mechanism 24 to change the pitch angle, so that the windward position of the blades 25 is changed, and the absorbed power is limited.

The working principle is as follows: when the wind speed monitoring device is used, the wind speed can be monitored in real time through the arranged wind speed sensor 6, if the wind speed runs below the rated wind speed, the absorbed power is always kept to be maximum, the pitch angle is not changed, if the wind speed runs above the rated wind speed, the wind speed sensor 6 transmits an electric signal to the main controller 4, the main controller 4 starts the pitch control system 5, meanwhile, the pitch control system 5 starts the pitch mechanism 24 to change the pitch angle, the windward position of the blades 25 is changed, the absorbed power is limited, meanwhile, after the numerical value of the power sensor 71 limited by the power grid 3 is contrasted and referred through the arranged power controller 7, the alternating current-direct current-alternating current bidirectional power converter 23 is started, the energy exchange between a direct current micro-grid and the power grid can be realized, the frequent action of power electronic devices caused by the small-range fluctuation of the direct current bus voltage is avoided, and the stable running of the micro-grid system is ensured, the system reliability is improved, meanwhile, the amplitude, the frequency and the phase angle of rotor exciting current can be changed through the arranged double-fed asynchronous generator 22, the purpose of adjusting the rotating speed, the active power and the reactive power of the generator is achieved, the efficiency of a unit is improved, the effects of frequency stabilization and voltage stabilization are achieved for a power grid, the power generation quality is improved, the functions of automatic pitch variation, pitch angle change and power control can be achieved through the arranged power control platform 1 according to the wind speed, the efficiency maximization of wind power generation is further achieved, and certain popularization value is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Power control platform of wind power generation equipment, including power control platform (1), its characterized in that: the power control platform (1) comprises a wind turbine (2), a power grid (3), a main controller (4), a variable pitch control system (5), a wind speed sensor (6) and a power controller (7), a gear box (21) is fixedly installed at the center of the interior of the wind turbine (2), a double-fed asynchronous generator (22) is fixedly installed on one side of the gear box (21), the double-fed asynchronous generator (22) is in transmission connection with the gear box (21) through a rotating shaft (26), blades (25) are installed on the periphery of one end, far away from the double-fed asynchronous generator (22), of the wind turbine (2), meanwhile, a variable pitch mechanism (24) is installed between the blades (25) and the wind turbine (2), a support machine barrel (27) is fixedly installed at the center of the bottom of the wind turbine (2), and a fixed base (28) is fixedly installed at the bottom end of the support machine barrel (27), and the inside embedding of unable adjustment base (28) installs two-way power converter of AC-DC-AC (23), and the bottom fixed mounting of unable adjustment base (28) has mounting base (29) simultaneously, two-way power converter of AC-DC-AC (23) and double-fed asynchronous generator (22) pass through wire electric connection, and are provided with power controller (7) between two-way power converter of AC-DC-AC (23) and main control unit (4), and power controller (7) and two-way power converter of AC-DC-AC (23), main control unit (4) are all through wire electric connection simultaneously.

2. The power control platform of a wind power plant of claim 1, characterized in that: and a power sensor (71) is electrically connected between the power controller (7) and the power grid (3) through a wire, and a wind speed sensor (6) is wirelessly connected to the outside of the main controller (4).

3. The power control platform of a wind power plant of claim 1, characterized in that: the variable pitch control system (5) is electrically connected with the variable pitch mechanism (24), and the variable pitch control system (5) is electrically connected with the main controller (4) through a wire.

4. The power control platform of a wind power plant of claim 1, characterized in that: the variable pitch mechanism (24) comprises a variable pitch bearing outer ring, a variable pitch bearing inner ring and a variable pitch driving rod.