Tower type photo-thermal power station heat absorber flow feedforward-feedback control method
A photothermal power station, feedback control technology, applied in the direction of solar collector controller, solar thermal power generation, solar collector, etc., to achieve the effect of improving system efficiency, stabilizing outlet temperature, and reducing light abandonment rate
Active Publication Date: 2021-07-09
XI AN JIAOTONG UNIV
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Problems solved by technology
[0003] In order to overcome the shortcomings of the above-mentioned prior art and solve the problem that there is still a lack of a fast and reliable control method for the flow rate of the heat absorber in cloudy weather, the purpose of the present invention is to provide a feedforward-feedback control method for the flow rate of the heat absorber of the tower photothermal power station , through the combination of neural network prediction and flow feed-forward-feedback control, the present invention can realize the rapid adjustment of the absorber flow rate under the condition of DNI fluctuations, ensure the stability of the outlet temperature, thereby reducing the light rejection rate and improving the efficiency of the tower solar thermal power station. system efficiency
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[0030] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0031] The invention is a feed-forward-feedback control method for the flow rate of the heat absorber of a tower photothermal power station based on neural network prediction, wherein the feedforward control obtains the flow adjustment value of the heat absorber under the disturbance of the cloud layer through the neural network prediction model, which can quickly respond The intensity of solar radiation changes drastically; the feedback control fine-tunes the flow of the heat absorber through PID, so that the temperature at the outlet of the heat absorber can be stabilized at the set value. By combining the neural network predictive feed-forward control and PID feedback control of the flow of the heat absorber, the present invention can realize the rapid adjustment of the flow of the heat absorber under the condition of solar radiation fluctuati...
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The invention discloses a tower type photo-thermal power station heat absorber flow feedforward-feedback control method. Feedforward control obtains a heat absorber flow adjusting value under cloud layer disturbance through a neural network prediction model, and dramatic changes of solar radiation intensity can be rapidly coped with; and feedback control performs fine adjustment on the flow of a heat absorber through PID, and the temperature of an outlet of the heat absorber can be stabilized at a set value. Through combination of neural network prediction feedforward control and PID feedback control of the flow of the heat absorber, rapid adjustment of the flow of the heat absorber under the condition of solar radiation fluctuation can be realized, stability of the outlet temperature of the heat absorber is ensured, so that the light abandoning rate is reduced, and the system efficiency of a tower type solar thermal power station is improved.
Description
technical field [0001] The invention belongs to the technical field of solar thermal power generation and automatic control, and particularly relates to a flow feedforward-feedback control method for a heat absorber of a tower-type photothermal power station. Background technique [0002] The solar thermal power station comes with a large-scale, cheap, safe and environmentally friendly energy storage system, which can significantly reduce the demand for energy storage in the future power system. In the whole life cycle, the carbon emission per unit of electricity of a solar thermal power station is only 1 / 6 of that of photovoltaics. In actual operation, the clouds above the mirror field of the CSP station will cause DNI fluctuations. When the fluctuations are severe, the heat absorber will be shut down due to severe cold and heat shocks, which will lead to a high light rejection rate and limit the The photoelectric efficiency of the photothermal power station is improved. ...
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Login to View More IPC IPC(8): F24S50/80G06N3/08
CPCF24S50/80G06N3/08Y02E10/40
Inventor 李明佳王文奇周罕琦何雅玲
Owner XI AN JIAOTONG UNIV