JPS62121872A - Wind power generator - Google Patents

Abstract

PURPOSE:To improve the accuracy of output by variably controlling a variable velocity accelerator so as to offset the pulsation of the output of a variable propeller due to momentary variation in wind velocity, and variably controlling the pitch angle of said variable propeller. CONSTITUTION:A velocity regulating transmitter 26 detects a pulsation due to momentary variation in wind velocity among detected wind velocities, and variably controls the acceleration ratio of a variable velocity accelerator 22 so as to offset the pulsation of the output of a variable propeller. A displacement angle transmitter 20 detects the displacement of the output frequency of a generator 16 with respect to a system power source 18, and variably controls the pitch angle of the variable propeller 10 and controls an output so that the displacement of the output frequency can be within an off-adjustment limit. Thereby, the output control of generator can be carried out with high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wind power generator equipped with an output adjustment device.

[Conventional technology]

In a wind power generation device that operates in parallel with a grid power source, it is necessary to control the generator output so that it falls within a step-out limit regardless of the wind speed.

FIG. 2 shows a conventional wind power generator. In this wind power generation device, when the variable propeller 10 is rotated by the shell λ, the rotation of the variable propeller 10 is increased by 12, and the synchronous torpedo generator 16 is driven through the fluid stepper 14.
reactor. The output of the generator 1G is supplied to the grid power supply 18. The displacement angle transmitter 20 detects a change in the output of 16 by quantifying the wind speed V, and variably controls the pip angle of the 11 variable blade propeller 10 to perform output control.

FIG. 3 shows the operation of the apparatus of FIG. 2.

When the output of the generator 1G deviates from the rated value Δ to [3,C] as shown in (a) due to a change in the wind speed V, the angle of the variable blade [1 propeller 10] changes depending on the displacement. is controlled as shown in (b), and as a result, the output fluctuation of the generator 16 is (C
) to be held down like this.

This conventional wind power generator has the following drawbacks.

1) Since the adjustment of the T-shaped propeller 10 is carried out on SnM, the adjustment may cause sideways friction fatigue.
- Problems occur and there are reliability problems.

2) Since the variable pressure is large and the inertia is large, lag in adjustment and response deviation are unavoidable, the adjustment accuracy is not sufficient, and the variable pressure is [Copera output pulses.

3) The output of the grid power supply 18 is 1G generator.
Since the rotation speed is forcibly kept constant at a speed synchronized with the frequency of grid power M118, if there is pulsation in the variable propeller output, constant repetitive stress will be generated in the power transmission mechanism, shortening the life of the equipment, and This will lead to malfunction.

4) The fluid coupling 14 is required to smooth the pulse 1IIIJ of the variable propeller output, which increases the cost.

5) The use of fluid couplings reduces transmission efficiency due to slippage of the fluid couplings.

[Problems to be Solved by the Invention] The present invention aims to solve the above-mentioned conventional techniques and provide an output photoelectric device with improved output accuracy and reliability of 11+.

[W the problem? This invention (means for resolution)
Equipped with a mechanism that transmits the rotation of the variable propeller to the C generator via the i'i7 variable speed increase controller, which detects wind speed and cancels the pulsation of the variable propeller output due to instantaneous wind speed fluctuations. When the speed increasing ratio of the gearbox is variable controlled, the output of the generator is detected and the pitch angle of the covera is q-modulated to keep the output within the step-out limit. It is something.

[For production]

According to the solving means of the present invention, by controlling the variable speed speed increaser, the pulsation of the output of J and the variable valve is canceled out by the instantaneous wind speed fluctuation, and only the remaining large output fluctuation is thereby canceled out. is set by the pip variable control, and the power generation is smoothly controlled near the rated output. Therefore,
The fluid coupling of the conventional device is no longer necessary. Also, the pitch variable control is)! T! iii is fine, so Buddha Jn Bamboo is heading.

[Embodiment] An embodiment of the present invention is shown in FIG. This wind power system is equipped with a variable propeller 1, and when this is rotated by the wind, its rotation is increased by a variable speed increaser 22,
Power generation! 316. The output of the generator 16 is supplied to the grid power supply 18 .

The wind speed receiver 24 detects the wind speed V. Speed control transmission: brown 26
detects pulsations due to instantaneous wind speed fluctuations in the detected wind speed V, and varies the speed increase ratio of the variable speed increaser 22 so as to cancel out the pulsations in the variable propeller output due to the pulsations in the wind speed. 1. I control you. The 1; IX movement in the wind speed V is obtained, for example, as the width difference between the instantaneous wind speed and the average wind speed.

The displacement angle transmitter 20 is connected to the generator 16 for the standard power source 18.
The pitch angle of the variable propeller 10 is variably controlled so that the displacement of the output frequency is within the step-out limit, and output control 2+1 is performed. Since the variable speed increaser 22 removes the pulse fh, the fluctuation in the output of the power generation + Flt 16 corresponds to the average wind speed and becomes a fluctuation of IJ. Therefore, the pip control υ11 of the variable propeller 10 becomes slow.

As described above, the output of the power generator 16 is adjusted to the average wind speed by controlling the pitch angle 11. The corresponding large fluctuations are removed, and the grid power supply 18 is provided with an output that is controlled 1211 within the 11R regulation limits.

An example of the variable speed increaser 22 is shown in FIG. Since this uses a separate structure in the differential planetary gear, the internal gear 32 is placed concentrically with the sun center 30, and the sun float 30 is placed in these spaces.
and the play that meshes with the internal gear 32 at the same time? A gear 34 is arranged, and the 'lfl front gear λ/rear 42 is connected to the variable propeller 10 from the intermediate shaft 36 via the pinion 38.40.
The solar float 32 is connected to 1G for power generation. An external tooth 44 is formed on the outer periphery of the internal tooth 1''h, and a J pinion 46 connected to the heptad/18 meshes with it. By driving the T-tough 18 in accordance with the output of the speed transmitter 2G and reducing the speed increasing ratio by 1, the variable pulse [pulse Q during the output of 1 pesi 10] is removed. , 1 FIG. 5 shows the operation of the device shown in FIG. 1. (
a) Wind speed reception 1. 'l At the wind speed V detected at 24,
The speed control transmitter 26 calculates the instantaneous wind speed E relative to the average wind speed.
, F is subjected to variable control 211 of the speed increase ratio of the variable speed increaser 22 according to the displacement of the seedlings. As a result, in the output of the variable propeller 10, pulsations due to instantaneous fluctuations in wind speed are reduced, and only large fluctuations corresponding to the average wind speed remain, as shown in FIG. 3(b).

Therefore, from the displacement angle (, i i 20, the system power supply 18
Detecting the displacement of the output frequency of the generator 16 with respect to (
C) The pitch angle of the variable propeller 10 is variably controlled. As a result, the output fluctuation of the generator 16 is suppressed as shown in (d), and smooth output control is realized near the rated value.

Generally, in a wind power generator equipped with a variable propeller, as shown in Figure 6, the pitch angle is fixed to receive the wind most efficiently when the wind speed is weak, and the pitch angle is fixed so that the wind speed is higher than the rated output. When this happens, the pitch angle is variably controlled to maintain the rated horn Δ. In this case, in the conventional device shown in Fig. 2, there is no means to suppress pulsation other than pip angle control. Then, the device C in FIG.
2, even if the fixed pitching 11 is used, the pulsation can be controlled by H'j''l.

Also, Ki +)) IJ? + is 5'i! by the rotation detector 25, as shown by the dotted line 27 in FIG. Detects the rotation of the electric machine 1G, controls the variable speed increaser 22, and inputs one generator 16! By controlling the number by 11, synchronization becomes easier.

Note that this invention can be applied not only to parallel operation with a grid power source, but also to a wind power generation device of type A operation.

〔Effect of the invention〕

That’s all β! As explained above, according to the present invention, the following effects can be obtained by using the variable speed increaser and the variable pitch control together.

1) The variable speed increase 1 with small inertia cancels out the output pulsations caused by instantaneous wind speed fluctuations, and when used in combination with variable pitch control, the output of the generator can be controlled to a high viscosity.

2) Due to the pulsating R'i L/ action of the variable speed increaser, the variable pitch can be adjusted slowly and the reliability of the variable propeller is improved.

3) Since the output is constant, the stress level of the transmission mechanism is also constant, extending the life of the R unit and improving reliability.

Ru.

4) Since the output is constant, there is no need for fluid couplings.
Increased efficiency.

5) By increasing the speed increase ratio at startup, the startup wind speed can be lowered.

6) It becomes easier to synchronize at startup.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a block diagram showing a conventional device. FIG. 3 is an explanatory diagram of the operation of the apparatus shown in FIG. 2. FIG. 4 is a mechanical diagram showing an example of the variable speed amplifier 22 of FIG. 1. FIG. 5 is an explanatory diagram of the loading operation shown in FIG. 1. FIG. 6 is a diagram C showing the relationship between the wind speed and the output horn of a wind power generator. 10... Possible bellows 11, 18... Grid power supply, 2
2...Variable speed increaser. Figure 1 10: iT'12・Roma\output r:o soteno

Claims (1)

[Scope of Claims] A mechanism for transmitting the rotation of a variable propeller to a generator via a variable speed increaser; means for variably controlling the speed increasing ratio of the variable speed increaser; and means for detecting the output of the generator and variably controlling the pitch angle of the variable propeller so that the output is within a step-out limit. A wind power generation device comprising: