Abstract: This project proposes a novel bidirectional interlinking converter (BIC) ancillary feature to improve transient performance of an islanded hybrid ac-dc microgrid. A BIC connects an ac microgrid with inertial and non-inertial sources to a…
Abstract: This paper introduces a single-stage soft-switched high-frequency-link three-phase dc-ac converter. The topology supports unidirectional dc-to-ac power flow for grid integration of photovoltaic sources, fuel cells, etc. High-frequency magnetic isolation reduces system volume, weight, and…
Abstract: This paper proposes a variable-turns-ratio high-frequency link inverter to easily achieve multi-level outputs for isolated single-stage high-frequency link inverters. To improve current quality, dynamically adjust transformer turns ratio to get five-level (±2, ±1, and…
Abstract: This paper examines the high power density bidirectional dc-dc converter with interleaving, soft-switching, and near critical conduction mode (near-CRM). Systematic design and control methods improve passive current balancing between multiple interleaved phases without phase…
Abstract: For grid power flow control, a single-stage ac-ac converter with controllable phase and amplitude (ACCPA) can simultaneously regulate output voltage phase and amplitude with respect to input voltage. Single-stage ACCPA can be connected to…
Abstract: Power decoupling requires large electrolytic capacitors on the dc bus of a single-phase inverter. Although the active power decoupling circuit can restrain the ripple voltage with twice the fundamental frequency on the dc bus…
Abstract: This paper proposes a novel dc power electronic transformer (DCPET) topology for locomotive, ac/dc hybrid grid, dc distribution grid, and other isolated medium-voltage and high-power applications. DCPET has fewer power semiconductor devices and high-frequency…
Abstract: An ac grid-converter system’s modified sequence-domain forbidden-region-based criterion (N-FRBC) is proposed. Due to the mirror frequency symmetry of the impedance ratio matrix in modified sequence-domain, FRBC in dq-domain has fewer constraint conditions. The improved…
Abstract: DAB converter systems need better modeling. First, multiconverter system models are built systematically. Continuous-time large-signal average models are created for system-level analysis and efficient time-domain simulation. GAM is used to derive the base DAB…
Abstract: This paper proposes a high-performance shade-tolerant maximum power point tracking (STMPPT) technique for photovoltaic (PV) dc-dc converter stages. Two feedback loops regulate PV array current using average current-mode control (ACMC). Current-mode control is better…
Abstract: This paper introduces a deadbeat-based SI-MIMO dc-dc converter method. The proposed method simultaneously regulates input current (ICR) and output voltage (OVR) by solving the SI-MIMO dc-dc converter cross regulation problem. The output current observers…
Abstract: This project proposes a control for a single-phase grid-tied inverter operating in CCM and DCM to minimize inductors without increasing current THD. DCM nonlinearity compensation requires an inductance, making conventional CCM/DCM controls inductance-dependent. The…
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