Photovoltaic string azimuth angle determination method, string recombination method and related devices

Abstract

The invention provides a photovoltaic string azimuth angle determination method, a string recombination method and related devices. The method for determining an azimuth angle of a photovoltaic stringis characterized in that the azimuth angle of each string can be quantified by utilizing monitoring data of a power station, namely historical electrical characteristic data and irradiation data of each string, other data do not need to be measured independently, and only required data need to be extracted from a monitoring system, so the workload of data measurement is reduced, and cost is further reduced. After an azimuth angle deviation value of the string is obtained, a string recombination method can be further utilized to judge whether the string needs to be recombined or not so as to reduce series-parallel mismatch loss of the string and provide the power generation capacity of the whole power station.

Description

Technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and particularly relates to a method for determining the azimuth angle of a photovoltaic string, a string reorganization method and related devices. Background technique [0002] The azimuth angle of the photovoltaic string refers to the angle between the vertical plane of the photovoltaic array and the true south direction. In photovoltaic power stations, the azimuth angles of different strings may be inconsistent. For example, mountain power stations are affected by the terrain, and the azimuth angles of different strings may be inconsistent; roof-top power stations are affected by the roof shape, and the azimuth angles of the photovoltaic modules installed on it may also It may be inconsistent; there are other inconsistencies in azimuth due to construction reasons. [0003] For the photovoltaic power plants that have been built, strings with different azimuth angles are connect...

AI Technical Summary

Problems solved by technology

[0004] In the related technology, the IV curve scanning or manual measurement is usually used to determine the azimuth angle of the string for the completed power station, but both of these two methods need to measure a large amount of data and then calculate it, and the workload is heavy and the cost is high.

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