SU1449786A1 - System for controlling heliostat - Google Patents

Abstract

The invention allows for improved tracking accuracy by compensating for the deformation of the support of the reflected beam sensor. The two-coordinate sensor 1 of the reflected beam has an electrical axis correction circuit. The sensor is electrically connected via power amplifiers to the heliostat 3 orientation actuators. Reflector 6 is fixed on sensor 1 and optically connected to the heliostat and flat measuring element. Between the last and the reflector m. A collimator 7 is installed, filled in the form of position-photosensitive sensors 8, included in the correction circuit of the electrical axis of sensor 1. Sensors 8 mb are connected to the inputs of the computing device. Sensor 1 orients the heliostat on the radiation receiver 9 installed on the tower 10. The computing device, when processing the signals of the sensor 1, takes into account the deviations of the refracted beam by the reflector 6. As a result of this system implementation, the accuracy of the automatic control of the heliostat increases, which. leads to a decrease in radiation losses, and consequently, to an increase in the power of the solar installation. 2 hp f-ly, 3 ill. Yu (L 4 4: SO H 00 O

Description

I The invention relates to t-gtiotech-jiHKe, in particular to heliostat control systems.

The purpose of the invention is to improve tracking accuracy by compensating for the deformation of the support of the sensor of the reflected beam,

A: FIG. 1 shows a schematic diagram of a heliostat control system; FIG. 2 is an electrical diagram of a heliostat control system; i) 3 is a diagram of a heliostat control system with automation of the process of compensation for deformation of the support of the etra-beam sensor, option.

The heliostat control system :: includes a two-coordinate sensor 1 (Fig. 1) of the reflected beam, having depy 2 (Fig. 2) of the electrical axis correction, and actuators (not shown) of the orientation of the heliostat | 3 (Fig. 1), electrically connected with it - | zannye through amplifiers 4 (figure 2) power.

: The system is equipped with a flat measuring element 5 (FIG. 1) and a reflector 6 fixed on a two-coordinate sensor 1 and optically coupled with the heliostat 3 and measuring element 5.

j The control system can be |: packed with a collimator 7 (FIG. 3), installed between the reflector 6 and Measuring element 5, made in the form of position-photosensitive 1 sensor 8 included in the hH 2 (FIG. 2) correction electric bi xy sensor 1,

The system can be equipped with a computing device (not shown), and the sensors 8 are connected to its inputs.

The two-coordinate sensor 1 (FIG. 1) orients the heliostat 3 towards the radiation receiver 9 mounted on the tower 10.

The optical connection between heliost 3 and measuring element 5 is provided by reflector 6 so that, with precise geometric orientation of sensor 1, the beam reflected by heliostat 3 falls into the center of element 5, Ele 5 may have a two-axis saturation, which allows visual observation of the deformation of the sensor support 1.

The heliostat control system works in the following way.

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The rays of the sun fall on the heliostat 3 (Fig, 1). Reflected rays from it hit the sensor 1 of the reflected beam and the reflector 6, Refracted, the beam hits a fixed measuring element 5, installed so that when the optical axis of sensor 1 coincides with its installation direction to the receiver 9 of the radiation, the refracted beam hits the center measuring element 5. By the deflection of the refracted beam from the center of the element 5, it is possible to judge the displacement of the optical axis of the sensor 1 of the reflected beam from the installation direction. This displacement can be compensated for by displacing the electrical axis of the sensor (Fig. "2) by manually adjusting the resistance variables during mechanical movement of the sensor.

If there are position-photosensitive sensors 8 (Fig. 3), collimator 7 converts the refracted by the reflector beam into two in the form of thin strips that correspond to the azimuth and zenithal deviations of the optical axis of the sensor 1 from the installation direction. The magnitudes of the resistances of the position-photosensitive sensors 8 are directly proportional to the deviations of the rays from the center of the element 5. These resistances are introduced directly into the circuit (Fig. 2) of the correction of the electrical axis of the sensor 1,

If a computing device is used in the heliostat control system 3, the outputs of the position-sensitive sensors 8 are connected to the inputs of the computing device, which, when processing the signals of the sensor 1 of the reflected beam, takes into account the deviation values of the refractive beam J-ieHHoro 6.

The application of the invention will significantly improve the accuracy of the automatic control of the heliostat, which will lead to a decrease in radiation losses and, consequently, to an increase in the power of the solar installation.

Claims (3)

1. A heliostat control system containing a two-coordinate reflected beam face, having an electrical axis correction circuit, and actuators OPT: helio 3 steps Stat, electrically connected with it through power amplifiers, characterized in that, in order to keep track of the accuracy of tracking, it is equipped with a flat measuring element and a reflector mounted on a two-coordinate sensor and connected to the heliostat and measuring element. 2. Pop-1 system, characterized in that it is provided with cola 9786 lim.ioor installed between the reflection-) Hattelsm and the measuring element, made in the form of position-sensitive light sensors, included in the correction circuit of the electric axis of the two-coordinate sensor. 3. The system of PP. 1 and 2, about t - that she is 10 is equipped with a computing device, and the photosensitive-photosensitive sensors are connected to its inputs. Phases. one Fi8.2