Ultra-short-term power forecasting method for clear-sky photovoltaics based on real-time radiation collection technology

An ultra-short-term, clear sky technology, applied in photovoltaic power generation, photovoltaic modules, optical radiation generators, etc., which can solve the problems of unstable solar photovoltaic power generation and difficulty in grid connection.

Inactive Publication Date: 2011-12-14
STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

However, due to the instability of solar photovoltaic power generation, it has brought certain difficulties to grid connection. In order ...

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  • Ultra-short-term power forecasting method for clear-sky photovoltaics based on real-time radiation collection technology
  • Ultra-short-term power forecasting method for clear-sky photovoltaics based on real-time radiation collection technology

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Embodiment Construction

[0015] The photovoltaic ultra-short-term power prediction algorithm of the present invention consists of three links: establishment of radiation relational formula under clear sky, solar radiation prediction and real-time correction, photovoltaic power station power prediction and real-time correction, the algorithm flow is as follows figure 1 shown. The establishment of the relational expression under the clear sky is mainly to calculate the instantaneous solar radiation intensity of the circumscribed plane of the atmosphere in the recent historical day, combined with the historical radiation data of the automatic monitoring station of the day, to establish the relational expression between the two; the solar radiation prediction and real-time correction are real-time accurate Calculate the instantaneous solar radiation intensity of the circumscribed plane of the atmosphere, and substitute the calculation results into the relational formula to initially obtain the ground radia...

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Abstract

The ultra-short-term power forecast method of clear-sky photovoltaics based on real-time radiation collection technology uses the relationship between the radiation intensity of the circumscribed plane of the atmosphere and the ground radiation intensity under clear sky, and combines the real-time data of the ground radiation automatic environmental monitoring station to predict the future ground 0-4 The hourly solar radiation intensity is predicted, and the predicted results are input as parameters into the photoelectric conversion model to output the power generation of photovoltaic power plants in the next 0-4 hours. According to the prediction results, power grid dispatching can make overall arrangements for the coordination and cooperation of conventional power sources and photovoltaic power generation, rationally arrange the operation mode of the power grid, optimize real-time dispatching and adjustment, and accept more photovoltaic power generation. On the other hand, reduce the spinning reserve capacity and operating costs of the power system to Make full use of solar energy resources and reduce greenhouse gas emissions, so as to obtain greater economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation and distribution, and relates to a method for ultra-short-term power forecasting of photovoltaic power plants under clear skies. The forecast time is 0-4 hours in the future, the time resolution of the forecast point is 15 minutes, and the rolling cycle forecast is every 15 minutes. Background technique [0002] Solar photovoltaic power generation is a form of power generation that uses the photovoltaic effect principle of solar cells to directly convert solar radiation energy into electrical energy. Under the pressure of global energy shortage and environmental degradation, photovoltaic power generation has been valued by countries all over the world, and the photovoltaic power generation industry has developed rapidly. With the implementation of the building photovoltaic subsidy policy and the "Golden Sun" project in 2009, the process of photovoltaic power generation in my ...

Claims

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Application Information

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IPC IPC(8): H02N6/00H02S40/30
CPCY02E10/50
Inventor 程序周海丁杰王知嘉匡礼勇崔方陈颖曹潇于炳霞丁宇宇
Owner STATE GRID ELECTRIC POWER RES INST
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