Hybrid inverters are typically designed within the kilowatt range to harness the combined power of multiple PV panels and a battery system for supplying loads. However, most conventional hybrid inverters are incompatible with single PV panels due to their low voltage output. In this paper, a novel generation of hybrid microinverters is introduced, tailored to accommodate the power and voltage specifications of single PV panels. The proposed hybrid microinverter design integrates a bidirectional CLLLC converter to elevate the low voltage from the PV and battery to the high voltage level of the DC-link. Furthermore, a conventional GaN-based buck-boost converter is devised to facilitate battery charging via the PV. This approach entails packaging the battery, PV, and hybrid inverter together, resulting in the creation of the first PV AC module capable of delivering AC voltage directly from the PV panel output. To validate the effectiveness of the proposed system, a 700W hybrid microinverter was constructed and subjected to testing in this study.

This paper introduces a novel hybrid bidirectional DC-DC converter designed for energy storage applications, featuring high voltage conversion ratios. Utilizing a hybrid approach, the converter benefits from enhanced controllability and versatility, employing switched inductors and capacitors. During discharging and charging modes, the inductors are configured either in series or parallel, enabling the converter to achieve significant voltage gain. Furthermore, zero-voltage switching (ZVS) is attainable during both turn-on and turn-off dead times for select power switches, facilitating soft switching and thereby enhancing converter efficiency. The operational principles of the converter are thoroughly examined for both stepup and step-down modes, elucidating the theoretical equations governing its operation. Finally, a 1 kW (50V/800V) converter is simulated to validate its performance.

This paper proposes a double Maximum Power Point Tracking (MPPT) algorithm for achieving maximum efficiency of a grid-tied phase-shifted dual-PV LLC converter using the Adaptive Neuro-Fuzzy Interface System (ANFIS). The algorithm can extract maximum power from Photovoltaic (PV) panels under various weather conditions and partial shading. This dual MPPT algorithm generates switching frequency and phase shift through ANFIS to regulate the power flow using both Frequency Shift Modulation (FSM) and phase-shift modulation (PSM) techniques simultaneously. Here the ANFIS model is developed using the LLC converter’s input-output data set for each PV panel to train the neural network while the fuzzy rules ensure the optimum output using different membership functions. The second controller on the grid side maintains the DC link voltage to a fixed level as well as ensures grid power injection with minimal harmonic distortion. Derivation of this dual-MPPT algorithm and verification of the proposed closed-loop system is presented in this paper.

This paper presents a step-by-step analysis of the Linear Active Disturbance Rejection Control (LADRC) for single-phase Uninterruptible Power Supplies (UPS) application. In UPS application, the regulated output voltage with low Total Harmonic Distortion (THD) under different load conditions and disturbances is the desirable. To achieve this goal, LADRC is appropriate since it uses the state observer similar to the modern control theory. Also, this control method inherits the PID controller’s simplicity, it is not a model-based controller. Moreover, it is useful for experimental platforms since it can control the system even there was weakness in the modeling of the system. Finally, a 1kW single-phase UPS has been simulated in Matlab/Simulink to verify the theoretical analysis as well as the operation of the LADRC in this application.

In this paper, a Bidirectional DC-DC Converter (BDC) for the Electrical Vehicle (EV) application is proposed. The converter benefits the advantages of both switched-inductor and switched-capacitor converters. The proposed converter has wide voltage gain range, low voltage stress on the power switches, and common ground between the grounds of the input and output sides. In addition, synchronous rectification is utilized to achieve Zero Voltage Switching (ZVS) during turn on and turn off dead time, which enhance the efficiency of the converter. The operating principle of the converter, steady-state analysis, and all devices’ voltage and current stresses are derived. Finally, a 1 kW converter with constant high-voltage side (400V) and very low-voltage side (24V) has been designed and simulated.