阅读说明：本技术 一种紧凑型储能式垂直轴风力发电装置 (Compact energy storage type vertical axis wind power generation device ) 是由 张健 张翼 董昕昕 邱文俊 朱琦文 陈晓仪 于 2020-01-20 设计创作，主要内容包括：本发明涉及一种紧凑型储能式垂直轴风力发电装置,包括：风轮(F)；单向机械功率传动机构(D),其一端与风轮(F)连接；电机(G),与单向机械功率传动机构(D)另一端连接；双向变频器(B),与电机(G)连接；弹性联轴器(T),其一端与电机(G)连接；旋转储能(C),与弹性联轴器(T)另一端连接。与现有技术相比,本发明解决了风力发电连续性问题,减少风力间歇性影响,提升风力发电双向宽幅功率调节能力等优点。(The invention relates to a compact energy storage type vertical axis wind power generation device, which comprises: a wind wheel (F); one end of the unidirectional mechanical power transmission mechanism (D) is connected with the wind wheel (F); the motor (G) is connected with the other end of the unidirectional mechanical power transmission mechanism (D); the bidirectional frequency converter (B) is connected with the motor (G); one end of the elastic coupling (T) is connected with the motor (G); and the rotary energy storage (C) is connected with the other end of the elastic coupling (T). Compared with the prior art, the wind power generation system has the advantages of solving the problem of continuity of wind power generation, reducing the intermittent influence of wind power, improving the bidirectional wide power regulation capability of wind power generation and the like.)

1. A compact energy storage vertical axis wind turbine generator, comprising:

a wind wheel (F);

one end of the unidirectional mechanical power transmission mechanism (D) is connected with the wind wheel (F);

the motor (G) is connected with the other end of the unidirectional mechanical power transmission mechanism (D);

the bidirectional frequency converter (B) is connected with the motor (G);

one end of the elastic coupling (T) is connected with the motor (G);

and the rotary energy storage (C) is connected with the other end of the elastic coupling (T).

2. The compact energy-storage vertical axis wind power generation device according to claim 1, wherein the wind wheel (F) adopts a vertical axis mode and comprises an impeller and a central shaft which are of an integral structure, wherein the central shaft integrally extends downwards and then is connected with one end of the unidirectional mechanical power transmission mechanism (D).

3. A compact energy-storing vertical-axis wind turbine according to claim 1, characterized in that said unidirectional mechanical power transmission (D) ensures that the mechanical rotational power of the rotor (F) is transmitted to the motor (G) only in one direction.

4. A compact energy-storing vertical-axis wind turbine generator according to claim 1 or 3, wherein said unidirectional mechanical power transmission mechanism (D) is a unidirectional slip coupling or an electromagnetic coupling.

5. A compact energy storage vertical axis wind turbine generator as claimed in claim 1, wherein said electric machine (G) is an asynchronous ac machine structure comprising:

the rotor part is fixed on the rotating shaft through a conductive loop;

the stator part is formed by three-phase coil windings on a concentric cavity surrounding the rotating shaft.

6. The compact energy-storage vertical-axis wind turbine generator according to claim 1, wherein said bidirectional frequency converter (B) is an AC-DC-AC structure, the frequency converter connected to the electric machine (G) is a machine-side frequency converter, and the frequency converter connected to the grid is a grid-side frequency converter.

7. A compact energy-storing vertical-axis wind turbine according to claim 1, wherein the rotating energy storage (C) uses a disk or cylinder type low-speed rotating large mass as a storage medium for rotating mechanical energy.

8. The compact energy-storing vertical-axis wind turbine generator as claimed in claim 6, wherein the machine-side inverter is required to satisfy a wide-range frequency conversion requirement, the alternating current frequency of the machine-side inverter is f1, and the rotation frequency of the rotor of the motor (G) is f2, so that the following relationships exist:

f1max＞f2max；

0＜f1＜f1max；

0＜f2＜f2max；

wherein f1max is the maximum value of the alternating current frequency of the machine side frequency converter, and f2max is the maximum value of the rotating frequency of the rotor of the motor (G).

9. The compact energy-storing vertical-axis wind turbine generator according to claim 8, wherein when the rotational mechanical energy is converted into electrical energy, there is a relationship:

f2＞f1。

10. the compact energy-storing vertical-axis wind turbine generator as claimed in claim 8, wherein when the electrical energy is converted into rotational mechanical energy, there is a relationship:

f1＞f2。

Technical Field

The invention relates to a wind power generation device, in particular to a compact energy storage type vertical axis wind power generation device.

Background

Due to the characteristics of randomness, intermittence, volatility and the like of wind power generation, the cost of purchasing wind power by a power grid is higher than that of water power and thermal power, so that the competitive power of wind power is worse than that of water power and thermal power, the competitive power of wind power is in an unfavorable position when striving for a planned electric quantity index, and the wind power consumption efficiency is directly influenced; meanwhile, wind power generation needs other power supplies to provide peak shaving service for the wind power generation, but the price of the auxiliary service is not solved by market means at present, but is provided by other power supplies in a free manner, so that the wind and electricity abandonment and limitation are particularly serious when peak shaving capacity is in short supply during winter heat supply.

At present, the technical means that basically increases electrochemical energy storage is the main is to achieve the purposes of stabilizing wind power fluctuation, reducing wind abandonment, improving peak regulation and frequency modulation capacity and the like, but an electrochemical energy storage system is coupled with wind power through an electric side, the transmission efficiency is not high, and meanwhile, the energy storage is not matched with the service life of a fan, so that the investment and maintenance cost is too high, and the economic condition is not provided.

Disclosure of Invention

The invention aims to overcome the defects of the existing wind power generation technology and provide a compact energy storage type vertical axis wind power generation device.

The purpose of the invention can be realized by the following technical scheme:

a compact energy storage vertical axis wind turbine comprising:

a wind wheel;

one end of the unidirectional mechanical power transmission mechanism is connected with the wind wheel;

the motor is connected with the other end of the unidirectional mechanical power transmission mechanism;

the bidirectional frequency converter is connected with the motor;

one end of the elastic coupling is connected with the motor;

and the rotary energy storage device is connected with the other end of the elastic coupling.

Preferably, the wind wheel adopts a vertical shaft mode and comprises an impeller and a central shaft which are of an integral structure, wherein the central shaft integrally extends downwards and then is connected with one end of the unidirectional mechanical power transmission mechanism.

Preferably, the unidirectional mechanical power transmission mechanism ensures that the mechanical rotation power of the wind wheel can only be transmitted to the motor in one direction.

Preferably, the unidirectional mechanical power transmission mechanism is a unidirectional sliding coupler or an electromagnetic coupling coupler.

Preferably, the motor adopts an asynchronous alternating current motor structure, and comprises:

the rotor part is fixed on the rotating shaft through a conductive loop;

the stator part is formed by three-phase coil windings on a concentric cavity surrounding the rotating shaft.

Preferably, the bidirectional frequency converter adopts an alternating current-direct current-alternating current structure, the frequency converter connected with the motor is a machine side frequency converter, and the frequency converter connected with the power grid is a grid side frequency converter.

Preferably, the rotary energy storage adopts a disc or a cylindrical low-speed rotary large mass body as a storage medium of rotary mechanical energy.

Preferably, the machine side frequency converter needs to meet the requirement of wide-range frequency conversion, the alternating current frequency of the machine side frequency converter is f1, and the rotation frequency of the motor rotor is f2, then the following relations should exist:

f1max＞f2max；

0＜f1＜f1max；

0＜f2＜f2max；

wherein f1max is the maximum value of the alternating current frequency of the machine side frequency converter, and f2max is the maximum value of the rotating frequency of the motor rotor.

Preferably, when the rotational mechanical energy is converted into electrical energy for output, there should be a relationship:

f2＞f1。

preferably, when the electrical energy is converted into the rotational mechanical energy input, there should be a relationship:

f1＞f2。

the elastic coupling (T) solves the problem of flexible connection of the rotating shaft of the part G and the rotating shaft of the part C, and avoids mechanical resonance and the harm of asymmetrical mass center among the parts.

Compared with the prior art, the invention has the following advantages:

1) the problem of continuity of wind power generation is solved, and wind power intermittent influence is reduced;

2) the wind power generation power broad-width regulation capability is realized, bidirectional load control can be realized, and auxiliary services such as power grid peak regulation, frequency regulation, voltage regulation and the like can be participated;

3) the problem of energy storage and fan life-span matching and design integration is solved, whole cost is reduced, promote whole benefit.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the energy flow of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

As shown in fig. 1, a compact energy storage type vertical axis wind power generation apparatus includes: a wind wheel F; one end of the unidirectional mechanical power transmission mechanism D is connected with the wind wheel F; the motor G is connected with the other end of the unidirectional mechanical power transmission mechanism D; the bidirectional frequency converter B is connected with the motor G; one end of the elastic coupling T is connected with the motor G; and the rotary energy storage C is connected with the other end of the elastic coupling T.

The wind wheel F adopts a vertical shaft mode, the impeller and the central shaft are integrated and integrally rotate, and the central shaft integrally extends downwards and then is connected with one end of the unidirectional mechanical power transmission mechanism D.

The unidirectional mechanical power transmission mechanism D is a unidirectional sliding coupler (contact type) or an electromagnetic coupling coupler (non-contact type). The unidirectional mechanical power transmission mechanism D ensures that the mechanical rotation power of the wind wheel F can only be transmitted to the motor G in a unidirectional mode, namely the wind wheel F can drive the motor G to rotate, and the motor G cannot drive the wind wheel F to rotate.

The motor G adopts an asynchronous alternating current motor structure, and a conductive loop is fixed on the rotating shaft to form a rotor part of the motor; and a three-phase coil winding is arranged on a concentric cavity surrounding the rotating shaft to form a stator part of the motor, and the stator part can be powered by three-phase alternating current.

The bidirectional frequency converter B adopts an AC-DC-AC (AC-DC-AC) structure bidirectional frequency converter which can be connected with a three-phase AC power grid, the frequency converter connected with the motor G is a machine side frequency converter, and the frequency converter connected with the power grid is a grid side frequency converter.

The bidirectional frequency converter B solves the problem of flexible connection of a rotating shaft of the motor G and the rotating energy storage C, and avoids the harm of mechanical resonance and asymmetry of mass centers of a reduced part.

The elastic coupling T solves the problem of flexible connection of the rotating shaft of the part G and the rotating shaft of the part C, and avoids mechanical resonance and the harm of asymmetrical mass center among the parts.

The rotary energy storage C adopts a disc or a cylindrical low-speed rotary large-mass body as a storage medium of rotary mechanical energy.

The machine side frequency converter needs to meet the requirement of wide-range frequency conversion, the alternating current frequency of the machine side frequency converter is f1, the rotation frequency of a rotor of a motor G is f2, and the following relations exist:

f1max＞f2max；

0＜f1＜f1max；

0＜f2＜f2max；

wherein f1max is the maximum value of the alternating current frequency of the machine side frequency converter, and f2max is the maximum value of the rotating frequency of the rotor of the motor G.

When the rotating mechanical energy is converted into electric energy to be output, the following relations should be provided:

f2＞f1。

when the electric energy is converted into the rotating mechanical energy to be input, the following relations should be established:

f1＞f2。

the invention has the main technical points that: the device converts wind energy into rotary mechanical energy through the wind wheel, and realizes the technical scheme that the rotary mechanical energy and the electric energy can be converted in two directions through the asynchronous motor and the rotary energy storage.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.