Control Strategies and Power Decoupling Topologies to Mitigate 2ω-Ripple in Single-Phase Inverters: A Review and Open Challenges

Abstract

This paper provides a comprehensive review of the control approaches and the powerdecoupling topologies to mitigate 2ω-ripple problem in the single-phase inverters, its solutions, and discusses open challenges yet to be addressed. The cause and effects of 2ω-ripple problem and its solution based on the passive and active power-decoupling techniques are discussed. A subcategory of the active power-decoupling technique nominated as the control-oriented compensation technique is reviewed in detail, this technique can achieve the ripple-mitigation at the source through the control but not necessarily adds extra circuit or active filter to the system. The control-oriented compensation techniques can be applied in the two-stage DC-DC-AC converters and the single-stage inverters having a front-end control capability with the H-bridge such as in the quasi-switched-boost inverters. The merits and associated challenges of these techniques are listed and summarized in a tabular form. Finally, a conclusive discussion with open challenges is presented. INDEX TERMS 2ω−ripple, Single-phase Inverter, Control strategies, Power-decoupling schemes.

An active parallel power decoupling circuit with a dual loop control scheme for micro‐inverters

“…This loop controls the bidirectional flyback converter to damp the pulsation power on the dc link by absorbing and delivering the instantaneous required power. There are different control methods for APD circuits 11,44 that are generally divided into inductive current control and capacitive voltage control 53 . In this study, by controlling the sinusoidal current of the APD ( i dec ) as of the reference signal, an attempt has been made to achieve zero ripple for dc‐link current ( i PV ).…”

“…In parallel PV‐side methods, the power decoupling circuit is responsible for the energy sweep between the dc link and an additional bidirectional converter 43 . These topologies and related control methods were overviewed in recently published review papers 19,44–46 . For example, the authors in literature 34 successfully eliminated the electrolytic capacitor by a buck–boost bidirectional circuit.…”

Application of a Control Scheme Based on Predictive and Linear Strategy for Improved Transient State and Steady-State Performance in a Single-Phase Quasi-Z-Source Inverter

“…Power inverters are currently used in a wide range of industrial applications, and will be essential for the operation of future distribution networks [ 1 , 2 ]. Depending on users’ needs, different types of inverters can be used to feed different types of load, such as voltage source inverters (VSI), current source inverters (CSI), and impedance source inverters (ZSI, qZSI, and similar) [ 3 , 4 , 5 ].…”

Development of a DC-Side Direct Current Controlled Active Ripple Filter for Eliminating the Double-Line-Frequency Current Ripple in a Single-Phase DC/AC Conversion System

“…In recent years, the green energy conversion technologies for distributed generation system have become major industrial developments in the global trend of energy conservation and carbon reduction. Single-phase DC-AC power converters are generally used to supply AC loads in such applications [1][2][3][4][5]. The power generated by DC/AC conversion technologies according to user demands, and is then provided for stand-alone AC loads [6][7][8] or fed into the utility grid [9].…”

“…ARF technique is the power electronics circuit with energy storage elements [4] for eliminating the problem of double-line-frequency instantaneous power, and the power decoupling method is commonly used for the control strategy of the ARF [4,5]. Therefore, considering the size, cost, and characteristics of passive components, passive ripple filters have been gradually replaced by the ARF [11][12][13][14][15][18][19][20][21][22][23][24][25].…”