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In this paper an analytic model of the inverter static noise margin (SNM) is presented. The drain-induced barrier lowering (DIBL) effects are considered in view of the fact that their influence becomes more critical in nanometer (below 90 nm) bulk CMOS nodes, as devices are dimensioned with minimum sizes and operate in sub-threshold region. The inclusion of body bias effect in the SNM model is proposed...
In the control of 400Hz power inverter systems, a new method based on Hilbert transform and DQ transform is proposed. The αβ coordinate is structured according to actual measured voltage and its Hilbert transform. Then the DC quantities under the rotating coordinate is obtained by the DQ transform, followed which the double closed loop control model can be structured. Compared with the conventional...
Model Predictive Control (MPC) method is proposed in this paper applied to a single phase grid-connected inverter. This method uses a state-space equation of the system to predict the next time value of current from the grid side by adjusting the duty ratio of inverter in each sampling period. The duty ratio which minimizes a cost function is selected. Then, taking advantage of the duty ratio to control...
We propose a grid voltage modulated (GVM) direct power control (DPC) strategy for a grid-connected voltage source inverter (VSI) to control the instantaneous active and reactive powers. The GVM-DPC presents the system in d-q frame without using a phase-lock loop. In addition, the GVM method converts the system into a linear time-invariant system. The GVM-DPC is designed to obtain two separate second-order...
This paper is proposed to convert the Solar PV DC voltage into AC voltage by using 3 phase inverter and getting sinusoidal AC output voltage. To convert solar PV which is in DC needs to be converted into AC by using the devices like 3 phase inverter and boost converter. The solar PV is a variable DC that is to be converted into pure DC for which will convert variable DC to pure DC. The MPPT is designed...
The ever increase of nonlinear loads in electric distribution networks causes many problems due to the high level of harmonic currents. This paper proposes a new technique for controlling a single phase shunt active power filter based on a selective compensation using the newly developed technique of harmonic control arrays. Simulation results confirm the appropriate selective harmonic compensation...
The boost inverter is an attractive solution for photovoltaic (PV) microinverters since it is a single stage architecture. Indeed, in comparison, most of the microinverters topologies consist of two-stage structures, a DC-DC converter for voltage elevation and an inverter for grid connection, resulting in a lower efficiency. The boost inverter consists of two DC-DC boost converters connected in differential...
In this paper a static noise margin (SNM) analysis is done for an 8T SRAM cell build up with complementary tunnel-FETs (TFETs). The simulations are done with the help of a Verilog-A implemented 2D DC compact model for a double-gate (DG) TFET, published in [1]. The compact model is adapted to measurement data of fabricated nanowire (NW) GAA TFETs before analyzing the hold/read and write SNM of the...
Multilevel inverters has acquire a great attention of modern power electronic systems. It offers less distortion and electro-magnetic interference and hence, it can be used in medium voltage and high power applications. The aim of this research article is to propose a new asymmetric type multilevel inverter with minimum number of power switches. The proposed inverter produces 7-level voltage waveform...
This brief proposes an improved XOR logic gate and a novel full adder. The presented XOR has simple structure which consists of 2 CMOS transistors and 4 memristors, and it reduces 4 CMOS transistors compared with the previous. In addition, the novel full adder consists of 7 CMOS transistors and 10 memristors. This novel full adder reduces 8 CMOS transistors and 2 memristors, which means the size of...
Multilevel inverters allow to generate AC voltages with low total harmonic distortion (THD) but requires an increased number of power switches. One of the disadvantages of that is the increased probability of a fault in one of the power switches. Thus in order to improve the reliability of the converter a fast and robust fault detection scheme must be used. In this context this paper presents a new...
This paper is focused on the improvement of the grid current at the point of common coupling of a three-phase grid connected photovoltaic system supplying a non-linear load. This improvement is achieved by using the PV inverter as a shunt active power filter in addition to its main function of power injection in the grid. The shunt active power filtering is performed to compensate the disturbing grid...
This paper deals with the control design of an asymmetrical cascaded multilevel inverter. This structure therefore provides the capability to produce higher voltages at higher speeds with low switching frequency which has inherent low switching losses and high converter efficiency. Selective harmonic elimination(SHE) for asymmetrical multilevel CHB inverter control is proposed. The technique utilized...
In this paper, the design of a proportional resonant (PR) controller for the packed U cell (PUC) 5 level inverter is presented. The objective of the presented work is to present a better solution for current control in grid connected application of the investigated topology. A suitable LCL filter is designed along with the PR control scheme for grid connection. Simulation is performed in MATLAB®/Simulink...
This paper investigates the application of a current source inverter for interfacing a low voltage Photo-Voltaic (PV) source to the grid as a single stage configuration. The paper proposes a novel translated Space Vector PWM (SVPWM) to control the current source inverter to improve the dynamics of the system. The approach relies on the average dc bus voltage to operate the current source inverter...
In this paper a structure for high-speed incrementing/decrementing accumulator is proposed based on even and odd unit cells. Step of accumulation can be chosen among ±2n levels where n = 0, 1, 2, 3, … through a control digital word. A 10-bit accumulator is divided into two 5-bit accumulators where each one is realized in carry-ripple adder/subtractor structure. Basic cells are highly improved in number...
This work focuses on micro-grid, containing various alternative energy resources (wind and photovoltaic) and super-capacitor energy storage system which performs in stand-alone as well as in grid-connected modes. Various non-isolated converters are used to control the proposed micro-grid. A classical-based supervisory control scheme is designed to perform energy management in order to satisfy the...
This paper is mainly about the efficiency and leakage magnetic field of five types of power transfer coils with different structures in a magnetic resonant WPT system with a single-ended inverter. Five pairs of square coils have been formed, so as to compare the efficiency and magnetic field reducing effects by simulation.
Realization of high power conversion system utilizing parallel connected power converters rated at much smaller power levels due to limitations in switching device voltage and current ratings would be highly desirable. Therefore, modular configured converters are imminent in high power industrial applications due to their numerous benefits over singular high capacity converter or inverter. They can...
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