Distributed photovoltaic system efficiency evaluation method and device based on cloud data analysis

Abstract

The invention relates to a distributed photovoltaic system efficiency evaluation method and device based on cloud data analysis. The method comprises the steps: establishing a comprehensive evaluationindex system with the natural resource index, the electric quantity, the energy consumption, the equipment operation level and the economic benefit as the indexes and calculating the indexes; obtaining the index data to form an evaluation judgment matrix; determining the index weight by using the comprehensive objective weight method; and calculating the evaluation value of the photovoltaic powerstation operation characteristics according to the weight and performing performance analysis of the photovoltaic system through comprehensive evaluation of the single index and multiple indexes fromdifferent time scales and spatial scales. The device comprises an index calculation module, a standardized processing module, an objective weight calculation module and an evaluation value calculation module. The evaluation result can be used for analyzing the potential safety hazards of photovoltaic modules and other components as well as the actual impact on power generation of the power station and giving suggestions to improve the efficiency of photovoltaic power generation.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a distributed photovoltaic system efficiency evaluation method and device based on cloud data analysis. Background technique [0002] With the increasingly prominent contradiction between energy shortage and energy demand, energy prices will continue to rise, which seriously hinders the pace of social development. It is imminent to find renewable energy and take the road of sustainable development. As the most common renewable energy, solar energy is not only widely distributed, non-polluting, but also renewable, and is considered internationally as the best alternative to fossil energy. Distributed photovoltaic power generation is a new type of power generation and comprehensive utilization of energy with broad development prospects. It advocates the principles of nearby power generation, nearby use, nearby conversion, and nearby grid connection to meet the...

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Problems solved by technology

[0005] In view of the above-mentioned problems in the prior art, as well as the unsound efficiency evaluation system of distributed photovoltaic power plants, the poor referenceability of evaluation results, and the inability to provide effective guidance for the operation and maintenance of photovoltaic power plants, fault diagnosis, and efficiency improvement, t

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