Photovoltaic rapid detection and accurate diagnosis method based on maximum power point tracking data
A technology of maximum power point and tracking data, which is applied in photovoltaic power generation, instruments, and adjustment of electrical variables, etc., can solve the problems of untimely fault detection and location, high diagnosis cost, etc., reduce the possibility of inducing fire, short detection time, and maintenance safe effect
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[0045]The technical solution of the present invention will be described in detail below, but the protection scope of the present invention is not limited to the embodiments. Such asfigure 1 As shown, the photovoltaic rapid detection and accurate diagnosis method based on maximum power point tracking data of this embodiment can be easily embedded in an existing commercial inverter, and the method sequentially includes the following steps:
[0046]S1: Establish the relationship model of the impact of abnormal conditions such as common serious faults and partial occlusions in the photovoltaic system on the output, and consider the relationship characteristics of different mismatch levels in the two systems with and without blocking diodes;
[0047]S2: Based on the current drop between adjacent sampling intervals in the maximum power point tracking process, the abnormal situation detection is realized, and the sampling frequency and the disturbance step length are considered to determine the ...
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