A state-of-the-art comprehensive review of modern control techniques for grid-connected wind turbines and photovoltaic arrays distributed generation systems

Abstract

This paper presents a state-of-the-art comprehensive review of the modern control techniques for the widely recommended two distributed generation systems (DGSs) using permanent magnet synchronous generator (PMSG)- and doubly-fed induction generator (DFIG)-based wind turbines (WTs) and photovoltaic (PV) arrays in grid-connected applications. The already published review papers individually study each DGS and also lack a systematic discussion on the control techniques without any suitable classification. This makes it difficult to study the comparatively improved performance of each control technique and comprehensively understand the control requirements of overall DGSs. Unlike existing literature, this paper first distinctively presents the generalized control configurations for both DGSs in the form of control blocks (CBs). Second, the modern control techniques suggested for each DGS are uniquely classified based on the CBs. Third, each CB is studied in detail considering its required control operation for the particular DGS component and recently proposed control techniques for its implementation. Furthermore, a detailed data analysis and comparative graphical illustrations are provided to appropriately study the merits and demerits of every state-of-the-art control technique. Finally, the useful future research directions are presented to realize improved hardware components and control techniques for the grid-connected WTs and PV arrays DGSs.