Method and device for detecting generation performance of photovoltaic power generation system

Abstract

The invention provides a method and a device for detecting generation performance of a photovoltaic power generation system, and relates to the technical field of photovoltaic power generation. The method comprises the following steps: obtaining an active power value which is actually output by the photovoltaic power generation system and a theoretical power value of the photovoltaic power generation system and determining a generation performance index of the photovoltaic power generation system; obtaining the generating capacity of the photovoltaic power generation system within a preset time period, the nominal power sum of photovoltaic modules of the photovoltaic power generation system, the irradiation intensity under a standard test condition and the inclined mean effective radiation received by the photovoltaic modules of the photovoltaic power generation system within the preset time period and determining a generating efficiency value of the photovoltaic power generation system; and determining the generation performance state of the photovoltaic power generation system according to the generation performance index of the photovoltaic power generation system and the generating efficiency value of the photovoltaic power generation system and determining whether the photovoltaic power generation system meets an inspection and maintenance condition or not. The method and the device can solve the problems that a failure of generating equipment cannot be easily judged in advance and an outage failure of the generating equipment cannot be easily avoided in the prior art.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a method and device for detecting power generation performance of a photovoltaic power generation system. Background technique [0002] At present, as the global climate problem is getting worse and the contradiction between energy supply and demand is intensifying, countries around the world are adjusting energy policies from the perspective of sustainable development and ensuring energy supply security, and incorporating new energy development into national development strategies. Solar energy has become a renewable energy power generation method because of its abundant resources, inexhaustibility, cleanness and safety. At present, large-scale and distributed grid-connected photovoltaic power systems have been widely used. [0003] The power generation equipment that currently constitutes the photovoltaic power generation system is different from the powe...

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Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for detecting the power generation performance of a photovoltaic power generation system to solve the problem that in the prior art, maintenance and repair of power generation equipment in a photovoltaic power generation system will consume a lot of manpower and time, and it is difficult to pre-judge the failure of power generation equipment , so it is difficult to avoid the problem of shutdown failure of power generation equipment

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