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Power prediction method for photovoltaic power plant

A technology for photovoltaic power station and power forecasting, which is applied in forecasting, instrumentation, data processing applications, etc., can solve the problems of complex calculation methods, and achieve the effect of small forecast error and simple calculation.

Inactive Publication Date: 2015-12-23
XUJI GRP +1
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for predicting the power of photovoltaic power plants based on vertical matching of historical data to solve the problem of complex calculations in existing calculation methods

Method used

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  • Power prediction method for photovoltaic power plant
  • Power prediction method for photovoltaic power plant
  • Power prediction method for photovoltaic power plant

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] The present invention provides a method for predicting the power of a photovoltaic power station. According to the weather forecast information at time t in the future, the light intensity and various meteorological factors in the weather forecast information are compared with the light intensity and various meteorological factors in the historical data Corresponding comparison and similarity matching are carried out to obtain several sets of historical data with similar light intensity and various meteorological factors. According to the historical data, the power output value P of the photovoltaic power station at the future time t is predicted. t '. The power prediction model is:

[0035] P t ′ = P s t c ...

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Abstract

The invention relates to a power prediction method for a photovoltaic power plant. According to the weather prediction information at a future time t, the illumination intensity and various weather factors in the weather prediction information are compared correspondingly with the illumination intensity and various weather factors in historical data for similarity matching. After that, the illumination intensity and a plurality of sets of historical data similar to various weather factors are obtained. Based on the historical data, the power output value Pt' of the photovoltaic power plant at the future time t is predicted. According to the technical scheme of the invention, the power prediction method for the photovoltaic power plant is conducted based on the longitudinal matching of historical data, thus being simple in computation and small in prediction error. The method is very suitable for the power prediction for photovoltaic power plants during the engineering practice and has certain research value and engineering practical significance.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a method for predicting power of photovoltaic power plants based on vertical matching of historical data. Background technique [0002] In the actual operation of photovoltaic power plants, the power of photovoltaic power generation varies with the intensity of solar radiation, which has the characteristics of volatility, intermittent and randomness. These characteristics lead to power fluctuations in the photovoltaic field, which in turn will affect the overall operation of the regional power grid, which in turn will affect the voltage stability in the entire regional power grid. When the photovoltaic power station is connected to the grid, it will bring certain hidden dangers to the safe and stable operation of the entire power system. [0003] Photovoltaic power station power prediction is the prediction of the next few hours or days. It can predict future power c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06
Inventor 王景丹贺衬心龚晓伟孔波董永超霍富强程勇葛琪朱云霞
Owner XUJI GRP
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