JPH03173373A - Wind power generation set - Google Patents

Abstract

PURPOSE:To obtain stabilized electric power while utilizing the energy of wind effectively by a method wherein a power supply is calculated from the number of revolutions of a propeller to obtain a fluctuating power by subtracting the supplying power from a generating output while the amount of the fluctuating power is accumulated to return it into a power supply line properly. CONSTITUTION:A power supply determining means 8 obtains a moving average from the number of revolutions of a propeller 1 and calculates a surplus and stable power supply while a power generated by a generator 2 is detected by a power detecting means 4. A fluctuating power is obtained through a fluctuating power determining means 9 by subtracting said power supply from the generating power while the amount of fluctuating power is supplied to an accumulating means 10 through an output regulating means 6. According to this method, stable power may be obtained while the amount of fluctuating power is accumulated to return it into a power supply line 3 properly whereby the stabilized power may be obtained while utilizing the energy of wind effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an efficient wind power generation device that can supply stable power and co-supply power by smoothing output fluctuations.

[Conventional technology] Wind power generation uses the power of the wind to rotate a propeller, and the rotation of the propeller drives a generator to generate electricity. However, due to natural conditions, the wind speed and direction always fluctuate, making it difficult to maintain stable wind power. It is difficult to extract electricity. For this reason, the generator is used as a synchronous generator, and the AC output is converted to DC, and the DC output is converted back to AC using an inverter, so-called DC.
A link method is used.

Since the turbine speed is made variable in order to suppress the output fluctuation range within a certain range, the voltage and frequency of the synchronous generator fluctuate,
It cannot be directly connected in parallel with the commercial power supply, therefore,
The inverter controls the voltage and frequency to be constant.

[Problem to be solved by the invention J However, synchronous generators are more expensive than induction generators, and inverters become more expensive as their output increases.
It is difficult to introduce it for commercial power supply. Furthermore, depending on the wind conditions, the generated power may be instantaneously reduced by more than half, which poses the problem that wind power generation cannot provide a stable power source.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a wind power generation device that can efficiently utilize wind energy and obtain stable electric power with less negative impact on the environment.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a propeller rotated by wind, a generator driven by the rotation of the propeller, and an electric power connected to the generator. a supply line, an output adjustment means connected to the power supply line and extracting a fluctuating amount of power in order to smooth the power supplied by the power supply line, a rotation sensor for detecting rotation of the propeller, and detection of the rotation sensor. a power supply determining means that determines the power supplied by the power supply line from the value; a power detection means that is connected to the power supply line and detects the power generated by the generator; and a power generation output and supply detected by the power detection means. The device is equipped with a variable power determining means for determining the variable power by comparing the output power with the output adjusting means, and a power storage means for storing the fluctuating power extracted from the output adjusting means, smoothing it, and supplying it in parallel.

[Function] According to the above configuration, the power supply determining means calculates a moving average from the number of revolutions of the propeller and determines a stable power supply with sufficient margin, and on the other hand, detects the power generated by the generator, and calculates the power supply from the generated output. By subtracting the supplied power to obtain fluctuating power and supplying the fluctuating power to the power storage means via the output adjustment means, stable power is obtained, the fluctuating power is stored, and it is returned to the power supply line as appropriate. By that,
Stable power can be obtained while effectively utilizing wind energy.

[Example] Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, numeral 1 denotes a propeller that rotates with the wind W, and consists of a variable pitch groper whose blade angle can be freely changed. This propeller 1 is connected to a power generation R2, so that a generator 2 is driven by the propeller 1. A power supply line 3 is connected to the generator 2 to supply power to various load devices.

A power detection means 4 for detecting the power generated by the power generation tli2 is connected to this power supply line 3, and an output # adjustment means 6 for outputting fluctuating power via a transformer 5 is also connected.

The rotation of the propeller 1 is detected by a rotation sensor 7, and this is inputted to the power supply determining means 8 as a moving average rotation speed. The supplied power P for the average rotational speed N is input in advance to the supplied power determining means 8. The supplied power P is obtained from the supplied power determining means 8, and this is determined by the variable power determining means 9.
Output to. The variable power determining means 9 receives the power generation output P detected by the power detection means 4, subtracts the supplied power P8 from the power generation output P to calculate the variable power P0, and inputs this to the output adjustment means 6. The output adjustment means 6 adjusts the variable power P from the power supply line 3 based on the variable power P0 inputted from the variable power determining means 9. is taken in, rectified and supplied as DC power to the power storage means 10.
0 stores this DC-converted variable power P0, and then
After converting to alternating current with an inverter 11 as appropriate, the transformer 12
Power is supplied to the power supply line 3 via the power supply line 3.

In the above, the propeller 1 is rotated by the wind W, and the generator 2 is rotationally driven to generate electricity. In this case, the power generation output P becomes an unstable output that constantly fluctuates as shown in FIG. calculates the supplied power P8, and the variable power determining means 9 determines the variable power P from the generated output P and the supplied power P8. By calculating the variable power P0 from the power generation output P by the output adjustment means 6, a stable power supply P8 can always be obtained in the power supply line 3. Also, variable power P. is stored in the power storage means 10, and then the stored power is supplied to the power supply line 3 via the inverter 11° transformer 12.

Next, an example of the power storage means 10 will be explained with reference to FIG.

In FIG. 3, the power storage means 10 includes an electrolyzer 4fl13 that electrolyzes water to hydrogen and oxygen using variable power, and variable capacity tanks 14 and 15 that store hydrogen and oxygen, respectively.
and a fuel cell 16 that generates power using hydrogen and oxygen.

First, the output adjusting means 6 sets the variable power P based on the signal from the variable power determining means 9. is taken in and rectified into direct current, which is then applied to the electrode 1718 of the electrolytic cell 13. Electrolytic cell 1
The water in the tank 3 is converted into hydrogen and oxygen by electrolysis, and after being washed through a washing tower 1920, they are stored in variable capacity cass tanks 14 and 15. The water in the electrolytic cell 13 is ion-exchanged by the ion exchanger 21 and then transferred to the pure water storage tank 2.
2.

The fuel cell 16 generates electricity by reacting hydrogen and oxygen via an electrolyte, which is a reaction opposite to the electrolysis of water.

The DC power generated by the fuel pond 16 is converted into AC power by the inverter 11 as described above, and is supplied to the power supply line 3 via the transformer 12.

[Effects of the Invention] As is clear from the above explanation, the present invention exhibits the following excellent effects.

(1) By generating power using wind energy, which varies depending on natural conditions, stable, high-quality power can be supplied and power can be generated by effectively utilizing wind energy.

4. ff'i III explanation of the drawings Figure 1 is a block diagram of the present invention, Figure 2 is a diagram showing changes over time in the generated output and supplied power in wind power generation in the present invention, and Figure 3 is a diagram showing the power storage in the present invention. It is a bronc diagram showing an example of means.

In the figure, 1 is a propeller, 2 is an induction generator, 3 is a power supply line, 11 is a power detection means, 6 is an output adjustment means, 7 is a rotation sensor, 8 is a supply power determination means, 9 is a variable power determination means, 10 is a power storage means.

Claims (1)

[Claims] 1. A propeller rotated by wind, a generator driven by the rotation of the propeller, a power supply line connected to the generator, and a power supply line connected to the power supply line that supplies power to the power supply line. an output adjustment means for extracting the power for the fluctuation in order to smooth it; a rotation sensor for detecting the rotation of the propeller; a power supply determining means for determining the power to be supplied to the power supply line from the detected value of the rotation sensor; and a power supply line. a power detection means connected to the power generator for detecting the power generated by the generator; a fluctuation power determination means for determining the fluctuation power by comparing the generated output detected by the power detection means with the supplied power; and an output adjustment means. 1. A wind power generation device characterized by comprising: heat storage means for storing, smoothing, and co-supplying fluctuating amounts of electric power extracted from the wind power generator.