Method for improving accuracy of control of automatic sun track following of heliostat

A sun trajectory and automatic tracking technology, which is applied to solar collector controllers, solar collectors in specific environments, solar thermal devices, etc., can solve problems such as reduced accuracy, affecting control accuracy, and tracking deviation of heliostats. Achieve the effects of improving power generation efficiency, improving control accuracy, and reducing operating costs

Active Publication Date: 2009-12-30
CHINA HUADIAN ENG +1
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Problems solved by technology

However, in this technical solution, the accuracy requirements for the actuators of the actuator are relatively high, and the accuracy of the actuators is relatively poor or the accuracy decreases after a period of use, which will affect the control accuracy; There will be uncontrollable factors such as excessive backlash, which will also lead to deviations in heliostat tracking

Method used

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  • Method for improving accuracy of control of automatic sun track following of heliostat
  • Method for improving accuracy of control of automatic sun track following of heliostat
  • Method for improving accuracy of control of automatic sun track following of heliostat

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Embodiment Construction

[0026] Example. Choose a heliostat, and the transmission actuator of the heliostat is Schneider LXM intelligent servo driver and Schneider BSH1402P32F1A servo motor. The data transmission is carried out through the system’s MODBUS to CAN protocol conversion module and the system’s DPU controller. According to the solar angle motion formula, the controller calculates the real-time reflection of sunlight from the mirror surface to the heat absorber’s travel distance, and then the servo driver feeds back the travel position value of the heliostat through the protocol conversion module to the DPU controller to form a closed-loop control and complete the fixed position. The sun mirror automatically and accurately tracks the sun's trajectory and reflects sunlight to the heat sink on the top of the tower. Such as figure 1 As shown, the intelligent measurement and control device 4, the operator station 5, the DPU controller 6 and the communication protocol conversion module 7 constit...

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Abstract

The invention provides a method for improving the accuracy of the control of the automatic sun track following of a heliostat, which comprises the following steps that: a camera arranged in front of a heat absorber provides a control system with an accurate position of a light spot formed by light reflected onto the heat absorber by the heliostat in real time; and when a deviation in the position of the light spot occurs, the control system judges the deviation and sends a heliostat control command to control the heliostat to act to restore the position of the light spot formed by the light reflected onto the heat absorber by the heliostat to a given position. The method can monitor the operation state of the whole heliostat field and visually monitor the condition of the light spot formed by the light reflected by the heliostat. When used in a tower type solar thermal power plant, the method can improve the control accuracy of the whole tower type solar thermal power plant, improve the power generation efficiency and reduce operation cost by monitoring heliostats and correcting the deviation in the position of the light spots.

Description

technical field [0001] The invention relates to solar thermal power generation technology, in particular to a technology for improving the control precision of heliostats automatically tracking the sun track in a tower type solar thermal power generation system. Background technique [0002] Tower-type solar thermal power station (that is, tower-type solar thermal power generation system) is mainly composed of four parts: concentrating system, heat absorption / exchange system, heat storage system and power generation system, among which the efficiency and cost of the concentrating system largely affect The cost performance of thermal power plants is a factor that needs to be considered in the construction of solar thermal power plants. The concentrating system is mainly composed of a heliostat and a heat absorber; the function of the heliostat is to collect solar radiation energy and converge it to the heat absorber. Each heliostat tracks the sun by rotating around its axis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/38F24J2/07G05D3/20G05B19/418G06K9/20F24S20/20F24S50/20
CPCY02E10/41F24J2/38Y02E10/47F24S50/20
Inventor 章素华邵文远李和平徐静韩永
Owner CHINA HUADIAN ENG
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