Abstract
In Photovoltaic (PV) grid-connected systems, interharmonics represent a new power quality concern. Earlier research and field analysis have corroborated presence of interharmonic emission from PV connected inverters, with MPPT being amongst the main driving forces of interharmonics. In this sense, MPPT factors like sampling rate have a significant impact on PV system's interharmonic characteristic. While choosing sample rate of MPPT method, there is a trade-off among interharmonic emission and MPPT performance in general. Using a faster MPPT sample rate, for example, will enhance MPPT efficiency while also increasing interharmonic emission levels. To address the issue, this proposal proposes a new solution for interharmonics in PV systems. Because of frequency spectrum distribution, interharmonics in output current may be efficiently decreased. conversely, the suggested technique's MPPT performance can be maintained in the same way as when a fast MPPT sampling rate is used. suggested interharmonic mitigation's efficacy has been tested using a three-phase reduction on a PV- grid-connected system under partial shading condition. The research was carried out with the support of a MATLAB-SIMULINK system.
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