Photovoltaic power generation system performance evaluation method and device

Abstract

The invention provides a photovoltaic power generation system performance evaluation method and device which are applied to the technical field of electronics. The method includes the steps of obtaining running data and meteorological data of a photovoltaic power generation system; calculating the function relation between theoretical output power of the photovoltaic power generation system and solar irradiance under a set reference temperature condition; obtaining the corresponding relation among actual output power of the photovoltaic power generation system, the temperature of a photovoltaic assembly and the solar irradiance; converting the actual output power to the power under the set reference temperature condition, and obtaining reference actual output power; determining the corresponding relation between the reference actual output power and the solar irradiance; drawing a curve of the theoretical output power; drawing a scatter diagram of the reference actual output power; evaluating performance of the photovoltaic power generation system. By means of the method and the device, a maintenance plan is made as required, the running and maintenance level of the photovoltaic power generation system is optimized, and life-cycle maintenance cost of the device is reduced.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and device for evaluating the performance of a photovoltaic power generation system. Background technique [0002] With the development of computer software and sensing technology, in the field of traditional power generation, overhaul and maintenance models based on the status of power equipment have emerged in recent years. This model can continuously monitor, evaluate and predict the health and decline of equipment. And formulate maintenance plans as needed, while preventing equipment failure, maximize the maintenance cycle of equipment and reduce the maintenance cost of equipment life. The key to this model is making a quick, scientific assessment of the health of the equipment. [0003] To adopt the maintenance and maintenance mode based on the status of power equipment in the traditional power generation field mentioned above in the field of photovoltaic p...

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Problems solved by technology

[0005] At present, there is no system and method for comprehensive evaluation of the health status of photovoltaic power generation systems at home and abroad. The above-mentioned inspection and maintenance model based on equipment status that has been applied in the traditional power generation field has not yet been developed in the field of photovoltaic power generation, and there is no reference. theory and experience

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