Interharmonics in PV systems: A review of analysis and estimation methods; considerations for selection of an APT method

Abstract

A comprehensive reviewing of existing interharmonic analysis and estimation methodologies irrespective of application is carried out. This study is enlisting the characteristics of an appropriate method to analyse and estimate interharmonics in photovoltaic (PV) systems, and linking these characteristics with the features of the reviewed methodologies. The distinctive characteristics of interharmonic emissions related to PV systems are, therefore, presented. The various methodologies are classified, summarised, and a checklist is prepared to emphasise the areas to be paid attention to while establishing an apt method for interharmonic analysis in PV systems. The priorities for selection of a method by a practising engineer vary case by case. This study will serve as a guideline for selection and further development of a suitable method for interharmonic analysis in a PV-included power system.