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Irradiation property weather scene-based photovoltaic power generation acceptance estimation model

A technology for photovoltaic power generation and evaluation model, which is applied in the field of power operation and can solve problems such as insufficient consumption of new energy and uncertain power grid operation.

Active Publication Date: 2019-04-05
RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology

[0009] The present invention provides a photovoltaic power generation reception evaluation model based on meteorological scenarios with radiation characteristics, which is used to solve the problem of grid operation uncertainty under large-scale new energy grid-connected, improve grid operation capabilities, improve grid operation, and planning effects, thereby alleviating the current The problem of insufficient consumption of new energy plays an important role in promoting the development of renewable energy in China and the implementation of energy conservation, emission reduction and low-carbon development strategies

Method used

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  • Irradiation property weather scene-based photovoltaic power generation acceptance estimation model
  • Irradiation property weather scene-based photovoltaic power generation acceptance estimation model
  • Irradiation property weather scene-based photovoltaic power generation acceptance estimation model

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Embodiment approach

[0043] The key to photovoltaic output simulation is to 0t 、k t , R t and a simulation of T. Horizontal unobstructed lighting I 0t It is related to the geographical location of solar photovoltaic panels, seasons and time of day, etc. It can be calculated by the global solar radiation model, and the clear sky index k t It is mainly affected by factors such as cloud cover, weather changes, and altitude. It has strong intermittency and randomness, and is the main source of uncertainty in photovoltaic output. It needs to be realized by random simulation. At the same time, the clear sky index of multiple photovoltaic power plants with close geographical location has a strong correlation, so the stochastic differential equation model will be used for sampling considering the correlation. R t It is mainly related to the placement of the photovoltaic panel itself and the tracking method, and it is necessary to deduce the incident angle of sunlight under different tracking methods ...

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Abstract

An irradiation property weather scene-based photovoltaic power generation acceptance estimation model comprises the steps of analyzing and acquiring distribution property and random property of photovoltaic contribution according to running data of a solar photovoltaic system, and respectively modeling a certainty part and a randomness part of the solar photovoltaic contribution; simulating son irradiation intensity of an arbitrary place on earth at an arbitrary moment under the condition of no shielding by building a global solar radiation model with regard to the certainty part of the solarphotovoltaic contribution, and calculating an upper limit value of photovoltaic forecast contribution; modeling a photovoltaic power generation randomness part by a photovoltaic shielding factor withregard to the random part of the solar photovoltaic contribution, building a photovoltaic shielding factor probability distribution model to obtain a random part simulation value of the photovoltaic contribution, and generating a contribution time sequence of a solar photovoltaic system by superposing results of the certainty part and the randomness part. By the method, the problem of power grid running uncertainty under large-scale new energy grid connection is solved, and the running capability and effect of a power grid are improved.

Description

technical field [0001] The invention relates to the technical field of electric power operation, and in particular to a photovoltaic power generation admission evaluation model based on meteorological scenes of radiation characteristics. Background technique [0002] With the rapid development of new energy in my country, the randomness and intermittent nature of new energy output have brought a greater impact on the operation and planning of the power system. Due to the randomness, volatility and uncertainty of new energy output, large-scale new energy power generation grid connection will have a significant impact on the power output structure, operating form, energy saving and economical aspects of the power system: [0003] 1) When large-scale new energy is connected to the grid, the system has uncertainties not only on the load side, but also on the power generation side. Therefore, it is necessary to reserve more reserves to cope with the uncertainty of new energy out...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/46
CPCH02J3/383H02J3/386H02J3/46H02J2203/20Y02B10/10Y02E10/56Y02E10/76
Inventor 田鑫李雪亮吴健贾善杰李勃赵龙王艳郑志杰张杰牟宏汪湲高效海张丽娜张玉跃高晓楠付一木魏鑫袁振华
Owner RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER
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