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Meteorological-information-based photovoltaic power generation active power online evaluation method

A technology of photovoltaic power generation and active power, which is used in photovoltaic power generation, photovoltaic power stations, optical radiation generators, etc.

Inactive Publication Date: 2011-11-16
NANJING GUOLIAN ELECTRIC POWER ENG DESIGNCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem of online evaluation of active power characteristics of photovoltaic power generation, and to provide an online evaluation method of active power characteristics of photovoltaic power generation that can use meteorological information

Method used

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Embodiment

[0085] The invention is used for evaluating the active power characteristics of volt power generation. The photovoltaic power station consists of 50 photovoltaic panels with a power of 200kW, which are connected to the grid through 10 1MW inverters, and the total active capacity is 10MW. Figure 4 As shown, the unit in the figure is m. Photovoltaic panel area is 5m 2 , the conversion efficiency is 75%, the ambient temperature is 20°C, and the axes of the photovoltaic cell and the photometric equipment are both in the south direction, that is, a fd and a fm is 0°, inclination a qd and a qm Both are 30°, and the sun incidence angle is 45°. The cloud amount monitoring data is as follows: the thickness l of the cloud group is 50m, the height h of the cloud group from the ground is 1500m, and the ground projection coordinates are (0, 0). c is 10m / s. Assuming that the base thickness of the cloud is 100m, that is, when the thickness of the cloud is 100m, the atmospheric transm...

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Abstract

The invention discloses a meteorological-information-based photovoltaic power generation active power online evaluation method, which comprises the following steps of: 1, selecting a reference point, a reference direction and a sample photovoltaic panel, and setting a data acquisition moment t to be an initial moment 0; 2, acquiring the axial directions of the photovoltaic panel and photometric equipment; 3, acquiring the geographical position information and dip angle data of the photovoltaic panel and the photometric equipment; 4, acquiring solar irradiation sample data, prediction data and cloud cover monitoring data measured by the photometric equipment; 5, preprocessing the solar irradiation sample data and the prediction data; 6, preprocessing the cloud cover monitoring data; 7, computing the active power output of a photovoltaic component; and 8, obtaining a photovoltaic power generation active power characteristic curve. In the method, the data actually measured by the photometric equipment in the given time period of 1min is taken as a basis and the influence of a cloud cluster on a photovoltaic power station is comprehensively taken into account to obtain the photovoltaic power generation active power characteristic curve in the future 0 to 5min by approximately equal power processing and curve fitting, so active power characteristic analysis efficiency and accuracy are effectively improved, and the bases are provided for the formulation and regulation of complementary running policies and energy efficiency management policies of joint power generation systems utilizing a plurality of power supplies such as wind, sunlight and the like.

Description

technical field [0001] The invention relates to an online evaluation method for realizing active power characteristics of photovoltaic power generation, and belongs to the technical field of photovoltaic power generation control in new energy power generation technology. 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. As of the end of 2008, the accumulative installed capacity of photovoltaic power generation in my country was 140MW, and the proportion of grid-connected photovoltaic power generation was about 20%. With the implementation of the building photovoltaic subsidy policy an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N6/00H02S10/00
CPCY02E10/50
Inventor 汤奕王琦
Owner NANJING GUOLIAN ELECTRIC POWER ENG DESIGNCO
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