A Maximum Power Point Tracking Method for Photovoltaic Power Generation System Based on Voltage Estimation Method
A photovoltaic power generation system and maximum power point technology, applied in photovoltaic power generation, control/regulation systems, and regulation of electrical variables, can solve problems such as system output reduction, lack of consideration of shadow duration, and immature MPPT algorithm research, etc., to achieve Improve tracking speed, reduce algorithm complexity, and easy-to-achieve effects
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[0040] In order to achieve the above object, the inventive method proposes specific implementation steps as follows:
[0041] Step 1: Analyze the photovoltaic array of the DMPPT circuit structure.
[0042] The main difference between DMPPT and centralized maximum power tracking (CMPPT) is that the bypass diode is replaced by a DC / DC converter, and the photovoltaic cell module connected in parallel with the converter is called a photovoltaic cell module. There is an MPPT device; through the distributed configuration of DC / DC converters and MPPT devices, the MPPT implemented on the photovoltaic array as a whole is distributed to each module, so as to avoid the tracking results under CMPPT from staying at the second advantage and make the total power of the photovoltaic array reach the optimum value. The post-stage circuit of the photovoltaic array needs to perform MPPT again to complete the tracking of the maximum power point of the array including all modules. The structure d...
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