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Method for determining credibility of photovoltaic power capacities

A technology of photovoltaic power generation and reliability, applied in data processing applications, instruments, calculations, etc.

Active Publication Date: 2013-07-24
CHONGQING UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Foreign countries have paid attention to the reliability of photovoltaic power generation capacity since the 1980s, but have not conducted in-depth research on the correlation between photovoltaic output and grid load

Method used

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  • Method for determining credibility of photovoltaic power capacities
  • Method for determining credibility of photovoltaic power capacities
  • Method for determining credibility of photovoltaic power capacities

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Embodiment Construction

[0035] When calculating the reliability of photovoltaic power generation capacity, the present invention involves a discrete joint probability distribution model of photovoltaic output and load, and also relates to the calculation of reliability indexes of power generation systems including photovoltaic power stations. Therefore, before calculating the reliability of photovoltaic power generation capacity, the discrete joint probability distribution model of photovoltaic output and load and the calculation method of the reliability index of the power generation system including photovoltaic power plants are introduced.

[0036] 1. Discrete joint probability distribution model of photovoltaic output and load

[0037] 1.1) Output model of photovoltaic power station

[0038] There are many factors that affect the output of photovoltaic power generation, among which meteorological factors, especially solar radiation, are the most critical factors. According to the power generatio...

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Abstract

The invention discloses a method for determining the credibility of photovoltaic power capacities. The method comprises the following steps of: (1) creating a time-interval model of a hybrid power generation system containing a photovoltaic power station; (2) calculating a daytime reliability index Rd and a night reliability index of an original power generation system not containing a photovoltaic power station, and superimposing the indexes to obtain a synthetic reliability index Rx of the original power generation system; (3) connecting a photovoltaic power station to the original power generation system, and adjusting the load level of the hybrid power generation system with Ry and Rd as targets, thus obtaining a new load level of the hybrid power generation system; and (4) replacing the photovoltaic power station with a virtual conventional unit, performing iterative computation respectively at the new load level to obtain a daytime generating capacity Cy and a whole day generating capacity credibility Cd of the photovoltaic power station. By virtue of the method, the improvement on the daytime reliability of the system after the photovoltaic power station is added can be clearly investigated, and the credibility of the daytime and full-day photovoltaic power capacities can be calculated.

Description

technical field [0001] The invention belongs to the technical field of reliability calculation methods for power generation systems including photovoltaic power plants, and in particular relates to a calculation method for the reliability of photovoltaic power generation capacity taking into account the correlation between photovoltaic output and load. Background technique [0002] Solar energy has become a representative of renewable energy power generation methods because of its abundant resources, inexhaustibility, cleanness and safety. In China, large-scale grid-connected photovoltaic power generation has changed from planning to reality. In October 2011, Qinghai Golmud 200MW grid-connected photovoltaic power station has entered the grid-connected debugging and trial operation period. As of 2010, the cumulative installed capacity of photovoltaic power generation in my country has reached 893MW. It is estimated that by 2020, the photovoltaic installed capacity will reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCY02E60/00
Inventor 谢开贵高英胡博龙虹毓张晓邓勇沈玉明
Owner CHONGQING UNIV
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