Heat tank control device, combined with weather prediction data, of groove type solar thermal electric power generation system

A technology for photothermal power generation and weather forecasting, applied in heating devices, solar thermal devices, solar thermal power generation, etc., can solve problems such as excessive use of hot molten salt, large fluctuations, system shutdown, etc., and achieve the effect of improving reliability

Active Publication Date: 2016-03-02
中国东方电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the long-term operation of the solar trough solar thermal power generation system, affected by complex weather conditions, the randomness and volatility of solar energy are strong, and the quality of hot molten salt that the solar thermal power generation system can store at each time point has a wide range of changes. This can result in excessive use of stored hot molten salt under extreme conditions, leading to unplanned shutdowns of the system

Method used

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  • Heat tank control device, combined with weather prediction data, of groove type solar thermal electric power generation system
  • Heat tank control device, combined with weather prediction data, of groove type solar thermal electric power generation system
  • Heat tank control device, combined with weather prediction data, of groove type solar thermal electric power generation system

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Effect test

Embodiment 1

[0029] The hot tank control device of the trough photothermal power generation system combined with the weather forecast data includes the collector field, the hot tank, the cold tank and the power generation system, such as figure 1 As shown, the outlet of the heat collection field is connected to the inlet of the heat tank through the first pipeline; the outlet of the heat tank is connected to the molten salt pump A, and the molten salt pump A is connected to the inlet of the power generation system through the second pipeline The outlet of the power generation system is connected to the first inlet of the cold tank through a third pipeline; the outlet of the cold tank is connected to the inlet of the heat collection field through a fourth pipeline, and the outlet of the heat collection field Connected to the second inlet of the cold tank by a fifth pipe.

[0030] The control device includes a numerical weather forecast receiver, a heat tank flow regulation control unit and ...

Embodiment 2

[0032] The thermal tank control device of the trough solar thermal power generation system combined with weather forecast data, the specific control steps are as follows:

[0033] a. Weather forecast light radiation value in hourly value (W / m) is the reference input to calculate the temperature rise after heating the molten salt in the collector field , ,in, is the total length of the collector tube in the collector field, is the temperature loss of the collector field, is the molten salt density, is the specific heat of molten salt, is the total volume of the pipes in the collector field, ;

[0034] b. Using the formula Calculate the molten salt flow required to raise the molten salt temperature to the rated temperature, where, Output the molten salt temperature for the rated collector field, Enter the molten salt temperature for the rated collector field temperature;

[0035]c. According to the limit range of the actual molten salt flow rate, use the l...

Embodiment 3

[0044] In order to improve the grid-connected power generation reliability of the solar thermal power generation system, reduce the impact of the poor stability of solar energy resources on the output of the solar thermal power generation system, and make the solar thermal power generation system capable of receiving grid power control and At the same time, the control method is conducive to the long-term stable operation of the system under complex and diverse climatic conditions. The invention proposes a thermal tank control device for a trough photothermal power generation system combined with weather forecast data.

[0045] Specific control methods such as image 3 Shown:

[0046] Weather Forecast Irradiance Values ​​in Hourly Values (W / m) is the reference input to calculate the temperature rise after heating the molten salt in the collector field , ,in, is the total length of the collector tube in the collector field, is the temperature loss of the collector fi...

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Abstract

The invention relates to the technical field of solar groove type solar thermal electric power generation, in particular to a heat tank control device, combined with weather prediction data, of a groove type solar thermal electric power generation system. The heat tank control device comprises a numerical weather prediction receiver, a heat tank flow adjustment control unit and a central coordination control unit. The numerical weather prediction receiver receives numerical prediction data through the network. Numerical calculation is carried out through the numerical prediction data to solve a hydromechanical and thermodynamic equation set for describing the weather evolution process, and short-term solar resource prediction data are obtained. By means of the heat tank control device, combined with the weather prediction data, of the groove type solar thermal electric power generation system, the mass of hot melting salt stored in the system within a period in the future is estimated through numerical weather prediction, and flow control is carried out on a heat tank melting salt outlet pump according to the mass of the hot melting salt stored in a heat tank and the power grid dispatching power output requirement.

Description

technical field [0001] The invention relates to the technical field of solar trough photothermal power generation, in particular to a thermal tank control device for a trough photothermal power generation system combined with weather forecast data. Background technique [0002] Solar thermal power generation is a clean energy method that can be concentrated for large-scale power generation. The trough system is currently among the solar thermal power generation methods, with the highest degree of technical maturity and commercialization verification. The heat source required for solar thermal power generation all comes from sunlight, and the intensity of sunlight varies greatly, which will inevitably lead to a wide range of changes in the mass of hot molten salt that can be stored by the solar thermal power generation system at each time point. To be able to connect the solar thermal power generation system to the grid for power generation, it is necessary to plan and contr...

Claims

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Application Information

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IPC IPC(8): F24J2/40H02J3/46F03G6/00
CPCY02A30/00Y02E10/46
Inventor 刘征宇冯玲周宏林吴建东
Owner 中国东方电气集团有限公司
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