This paper explains the implementation of a small-signal model for new five-level series resonant inverter structure. The proposed circuit combines advantages multilevel inverters and characteristics physical phenomena, resonance. offers possibility to design linearized linear time-invariant (LTI) around an equilibrium point based on first-order Taylor series. After that, performance its are ev...

Multilevel inverter technology has emerged recently as a very important alternative in the area of high-power mediumvoltage energy control. Using multilevel inverters application in fuel cell, solar cell & wind turbines is increasing now a day‘s rapidly. Therefore, Harmonic reduction techniques in multilevel inverters are considered very important task Over the past decades, depending upon the ...

Abstract – In this paper, a generalized power loss algorithm for multilevel neutral-point clamped (NPC) PWM inverters is presented, which is applicable to any level number of multilevel inverters. In the case of three-level inverters, the conduction loss depends on the MI (modulation index) and the PF (power factor), and the switching loss depends on a switching frequency, turn-on and turn-off ...

This paper proposes a nonlinear decoupled current control scheme for grid-connected inverter with LCL filter. Decoupling the active and reactive channels is one of main demands in inverters. For inverters an L filter, decoupling can be achieved by proper feed-forward grid voltages. However, coupling complex issue converters filters. The resonance mode filter may cause instability, which adds mo...

Class E Resonant Inverters are theoretically capable of delivering any power to a load and achieve 100% efficiency at any frequency of operation. In practice efficiency in the “high 90's” can be achieved into megahertz frequencies regardless of inverter output powers. The topology also allows the manipulation of output power through sub-optimal operation, with a negligible efficiency penalty. T...

Objectives: This study proposes a droop controlled voltage unbalance reimbursement technique in an islanded microgrid. Methods/Analysis: The control system is executed in áâ static reference frame work. Here the distributed generators (DGs) inverters are managed appropriately to compensate imbalance in allocating active as well as reactive powers. The control system includes active as well as r...

This paper proposes a second-order harmonic reduction technique using a proportional-resonant (PR) controller for a photovoltaic (PV) power conditioning system (PCS). In a grid-connected single-phase system, inverters create a second-order harmonic at twice the fundamental frequency. A ripple component unsettles the operating points of the PV array and deteriorates the operation of the maximum ...

Repetitive control (RC), which can track any periodic signal with a known integer period zero steady-state error, is widely used for current of grid-tied inverters in microgrids. However, the inherent one fundamental time delay, leads to poor dynamic performance. Furthermore, performance conventional RC (CRC) will degrade when operating at high variation grid frequency. Therefore, this paper pr...

in the present paper, resonant frequencies and modes of a three-atom photonic molecule and a photonic crystal placed within a cavity are numerically calculated. first, governing formulation in transverse electric field mode (te) is obtained using maxwell equations. then, an algorithm based on a finite difference scheme and matrix algebra is presented. the algorithm is then implemented in a comp...