Stable tracking control method applied to trough type solar condenser

A technology of solar concentrator and trough solar energy, which is applied in the direction of solar collector controller, solar collector, solar thermal energy, etc., can solve the problems of limited speed setting value, large speed ladder, poor tracking stability, etc. Achieve the effect of improving stability and eliminating speed steps

Inactive Publication Date: 2015-09-30
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

However, the speed setting value of this method is limited, and there is a large speed ladder, which makes it difficult to control the tracking angle and the tracking stability is poor

Method used

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  • Stable tracking control method applied to trough type solar condenser
  • Stable tracking control method applied to trough type solar condenser
  • Stable tracking control method applied to trough type solar condenser

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Embodiment Construction

[0022] like Figure 5 As shown, the steady tracking control method applied to the trough solar concentrator described in the present invention, the specific implementation steps are as follows:

[0023] (1) Define the automatic tracking control mode of the trough solar concentrator: if the difference △θ between the target angle θ and the actual angle θ' is greater than zero, the motor will rotate forward; if the angle difference △θ is less than zero, the motor will reverse turn; if the angle difference △θ is equal to zero, the motor stops;

[0024] (2) According to actual engineering needs such as stability and real-time performance, set the set value △θ of the angle difference 0 and timing time t 0 ;

[0025] (3) Detect the starting tracking signal of the solar thermal power generation system: when the tracking signal is effective, then carry out the tracking control of the target angle of the trough solar concentrator, and perform step (4); when the tracking signal is inv...

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Abstract

The invention discloses a stable tracking control method applied to a trough type solar condenser. A controller detects that a tracking control starting signal is effective, and enters a stable tracking processing module. The method comprises the steps that firstly, an angle difference value delta theta is calculated and judged; then, the obtained angle difference value is compared with a set value delta theta 0, and a tracking mode is determined; if the angle different value is larger than the set value, a control motor carries out tracking with constant rotating speed; if the angle difference value is smaller than or equal to the set value, a control method of two-point calibration is adopted, and the instantaneous value v of the speed is obtained through a computational formula according to a time instantaneous value t to control the rotating speed of the control motor for tracking. The rotating speed of the control motor is changed in real time, therefore, the defects that according to a traditional control method, speed steps exist in the tracking process, consequently, the tracking angle is hard to control, and tracking precision is insufficient are overcome, and the stability of tracking control is improved.

Description

technical field [0001] The invention relates to a control method for trough solar thermal power generation. Background technique [0002] In recent years, with the increasingly serious energy and environmental problems, the research and application of renewable energy has become a hot spot today, and solar energy has attracted great attention because of its abundance and durability. [0003] Solar power generation is an important way to develop and utilize solar energy, and its power generation types are mainly divided into solar photovoltaic power generation and solar thermal power generation. Before photovoltaic technology has made a major breakthrough, solar thermal power generation has more advantages than photovoltaic power generation in large-scale applications. At present, the common solar thermal power generation methods mainly include tower type, trough type, butterfly type and linear Fresnel type, among which only the trough type solar thermal power generation has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/38F24J2/40F24S50/20
CPCY02E10/47
Inventor 宋哲王志峰原郭丰
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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