Active photovoltaic string arc fault detection method and system
A technology of arc fault and detection method, which is applied in the monitoring of photovoltaic systems, photovoltaic power generation, photovoltaic modules, etc., can solve problems such as inability to adapt, reliability cannot be guaranteed, etc., to reduce misjudgment rate, solve noise, and have strong anti-interference Effect
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[0023] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the inventive concept. These all belong to the protection scope of the present invention.
[0024] like Figure 1-2 As shown in the figure, an active photovoltaic string arc fault detection method provided by the present invention includes: the step of actively injecting a signal: actively generating a high-frequency signal, and actively outputting the high-frequency signal on the photovoltaic string side by means of coil coupling; Signal acquisition steps: measure and record the current signal on the DC bus on the PV string side to obtain current signal information on the DC bus on the PV string side...
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