SU1300625A1 - Wind-power electric installation - Google Patents

Abstract

The invention relates to wind energy and m. used in wind power plants with variable frequency of rotation of the wind turbine shaft. The aim of the invention is to increase the generation of electricity in the conditions of changing wind speed. The installation consists of an AC motor 2, K-poto shaft mechanically, connected with the wind turbine shaft 1, rectifier 3, adder 5. of integrator 6, active power sensor 7, rotational frequency sensor B, function converter 9 that implements cubic dependence, wind speed sensor 10 and differentiator 11. Introduction to the adder ... 5 of the wind speed derivative signal from differentiator 11 contributes to the rapid flow of transients and provides an increase in power generation under conditions of changing wind speed a. 1 il. 10 y, (L 1N H 00 o C35 ate

Description

The invention relates to wind power and can be used in wind power plants with variable frequency of rotation of the wind turbine shaft.

The purpose of the invention is to increase the amount of electricity produced in a changing wind speed.

The drawing shows a block diagram of a wind power installation.

The wind-electric installation contains a wind turbine 1 mounted on the same shaft with an alternating-current generator 2, the stator winding of which is connected to the input of the controlled rectifier 3 connected to the output of the load 4. The control input of the controlled rectifier 3 is connected to the output of the adder 5 through an integrator 6. To the three inputs of the adder 5 are connected respectively to the sensor

7 active load power sensor

8 the frequency of rotation of the wind turbine shaft through the functional converter 9, the wind speed sensor 10 through the differentiator 11.

The device works as follows.

With a fixed value of wind speed Vg. the alternator 2 gives through the rectifier 3 to the load 4 the power P. In this case, the signal from the rotation speed sensor 8,

proportional steady-state sign, the rectifier whose input is connected

The frequency of rotation uJ of the wind turbine shaft is fed to the input of the functional converter 9. The signal (s) at the output of converter 9 is proportional to the cube of the frequency of rotation of the wind turbine shaft (and)) and corresponds to the maximum power of the wind power unit 1 which can be obtained at this frequency. rotation of a wind turbine shaft. " This signal is fed to the first input of the adder 5, the second input of the adder 5 receives the signal (Up) from the output of the sensor 7 of the active power, U). the maximum value of the active power delivered to the load 4. The signal from the differentiator 11, which arrives at the third input of the adder 5, in the steady state at a constant wind speed is zero (U. 0), In the steady state at the output of the integra40

with the stator winding of the alternating current generator, the speed sensor of the wind turbine shaft, to the output of which is connected the input of the functional converter that implements the cubic dependence, the adder, whose inputs are connected respectively to the output of the functional converter and the output of the sensor of the active load power, and the output of the adder through the integrator, connect to the control input of the controlled voltage switch, which is different from the fact that, in order to increase the production of the amount of electricity under conditions of change from wind speed, a wind speed sensor and a differentiator are additionally added to it, more than the wind speed sensor output is connected via a differentiator

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the actual input of the adder.

VNIIPI order. Circulation 661 Subscription

Performance-POLYgr. pr-tie, Uzhgorod, st. Project, 4

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five

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five

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the torus 6 there is a constant signal providing the installation of such an opening angle of the thyristors of the rectifier 6, at which the signal at the output of the adder 5 is equal to zero (U. - U-- 0),

When the wind speed changes, the system leaves the steady-state mode, as the rotation frequency xJ of the wind turbine shaft and the load power P begin to change, and the error signal appears at the output of the adder 5, under the influence of which the angle of opening of the rectifier 6 thyristors changes. Transition The process ends at the moment when the new steady state Ы reaches the corresponding maximum of P at the new steady value of the wind speed. Introduction to the adder 5 of the signal of the derivative of the wind speed from the differentiator 11 contributes to the rapid flow of transients in the wind-electric installation and provides an increase in the production of electric power under conditions of a change in the wind speed.

Claims (1)

Invention Formula A wind power installation containing a wind turbine, the shaft of which is mechanically connected to the shaft of the alternator with the stator winding of the alternator, the rotational speed sensor of the wind turbine, to the output of which is connected the input of the functional converter that implements the cubic dependence, the adder, whose inputs are connected respectively to the output of the functional converter and the output of the sensor of the active load power, and the output of the adder via the integrator connected to a control input of a controllable rectifier, characterized in that, in order to increase the amount of electricity produced under conditions of change from orosti wind, it is further introduced wind speed sensor and the differentiator, and a wind velocity sensor output is connected via a differentiator to complement the actual input of the adder.