Inefficient identification method, device and system for photovoltaic power plant components

Abstract

The invention provides a low efficiency identification method, device and system of devices of a photovoltaic power station. The identification method comprises the following steps: obtaining electric quantity information of each device under a power station submatrix; and according to the electric quantity information of each device, determining whether the electric quantity information of each device satisfies a low efficiency determining condition set in advance, and determining at least one first device satisfying the low efficiency determining condition as a low-efficiency device, wherein the low efficiency determining condition is that a symmetry coefficient of the devices is smaller than a symmetry coefficient threshold configured in advance and a preset first time length and the device lasts for a preset first time length. According to the invention, through comparing actually detected electric quantity information of the devices with the preset condition, low-efficiency devices are rapidly positioned, and the low-efficiency devices can be rapidly and effectively checked and processed.

Description

technical field [0001] Embodiments of the present invention relate to photovoltaic power station detection technology, and in particular to a method, device and system for inefficient identification of photovoltaic power station components. Background technique [0002] At present, the area of ​​photovoltaic power stations is gradually expanding, and each power station has a large number of devices, especially the inverters and strings are very large. From the perspective of a 10MW power station, more than 3,800 28kw inverters are required. If one inverter is connected to 5 strings, the corresponding number of strings is between 15,000 and 20,000. If there is a device failure or inefficiency, it will directly lead to a decline in the operating efficiency of the power station. Therefore, in the operation process, effectively locate and identify an inverter or string with inefficiency or failure, and perform an inspection on the identified inefficiency device. Maintenance is ...

AI Technical Summary

Problems solved by technology

If there is a device failure or inefficiency, it will directly lead to a decline in the operating efficiency of the power station. Therefore, in the operation process, effectively locate and identify an inverter or string with inefficiency or failure, and perform an inspection on the identified inefficiency device. maintenance is very important

[0003] However, because the number of inverters or strings is huge, and it is impossible to see whether the devices are inefficient from the surface, how to locate and identify the inefficient or faulty devices in the photovoltaic power station is the technical problem to be solved by the present invention

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