Grid Connected Distributed Generation System with High Voltage Gain Cascaded DC-DC Converter Fed Asymmetric Multilevel Inverter Topology

In this paper, a new closed loop hybrid phase shift control is proposed for dual active bridge (DAB) converter with variable input voltage. The extended phase shift (EPS) control is applied when load gets heavy enough and the secondary side phase shift angle decreases to zero. When this modified DAB converter operates at light loads, the triple phase shift (TPS) modulation method is applied, and the added control freedom is the secondary phase shift angle between the two-secondary side switching legs. The hybrid phase shift control (HPS) scheme is a combination of EPS and TPS modulations, and it provides a very simple closed form implementation for the primary and secondary side phase shift angles. Depending on the application by changing the phase shift angles we can achieve Buck or Boost operation. A characteristic table feedback control method has been used for closed loop operation. By using 1D look up table the proposed DAB converter provides constant 400V for any given input voltage.

Section: Hps Control Strategymentioning

confidence: 99%

An improved closed loop hybrid phase shift controller for dual active bridge converter

Narasimha¹,

Salkuti

2020

“…Based on the above about the function of the magnetic field, and comparing to the conventional methods of black powder removal, and also based on the abilities of computerized systems for monitoring and/or controlling functions [19][20][21][22][23][24][25][26][27][28][29][30][31][32], the presented method in this paper focuses on controlling the level, location, and polarity of the allocated magnetic field in order to remove the black powder from crude oil. On the other hand, due to adopting the electrical resistivity measuring for well logging development [33], a new design of resistivity sensor in presented in this study in order to sense the crude oil resistivity will be presented through which the proposed system's performance can be evaluated.…”

Section: Proposed Idea and System Designmentioning

confidence: 99%

Design of computerized monitoring and processing system for magnetic field controlling against the phenomenon of black powder in crude oil pipelines

Attia

Balhassan

2020

Black power represents the main difficulty faced by the oil flow in pipelines. The negative effect of this powder reaches to stop the oil flow due to clogging the pipelines, in addition to the damaging of the crude oil pumps. Many solutions have been proposed in literature based on chemical or physical processes. On the other side, applying the fixed magnetic field has been presented in separation and extraction process of metal impurities in water pipelines applications. From these facts, this paper proposes an alternative solution (idea, design, and methodology for future implementation) for the black power removing from oil pipelines. The proposed system works on firstly sensing the resistivity parameter in the crude oil as an indication about the oil status with respect to the quantity of the black powder particles, then works on monitoring and controlling the level, location, and polarity of the required magnetic field that to work on cracking particles cracking function that in order to facilitate the crude oil motion in the pipelines. In addition, the proposed solution presents a new design of electrical resistivity sensor as an important indication in terms of evaluating the proposed system performance

“…Cascaded H Bridge topology is gaining popularity due to its simple structure [6][7][8]. The absence of diodes and capacitor in the circuit adds more attraction.…”

Section: Introductionmentioning

confidence: 99%

“…Level 5 (Vo = V3) Int J Elec & Comp Eng ISSN: 2088-8708  Modular multilevel inverter for renewable energy applications (A. Arikesh) (f). Level 6 (V o = V 3 +V 1 ) Switching sequence for circuit i The Modular 49 level Modified H bridge type ACMLI follows the same mathematical expressions for the values of DC voltage sources, Number of stepsgenerates and maximum output voltage (ie) (1), (2),(3) and(4)is satisfied by the Modular 49 level Modified H bridge type ACMLI also, for this circuit the number of power electronic components required is governed by different equation and is given below (7).…”

mentioning

confidence: 99%

Modular multilevel inverter for renewable energy applications

Arikesh

Parvathy

2020

<p>This paper proposes a Multilevel Inverter (MLI) which focuses on two objective , minimal voltage sources and lesser switching component. The proposed Asymmetrical Cascaded Multilevel Inverter (ACMLI) is able to achieve the objective by selectively opting the voltage level of DC sources chosen and implementing the mathematical operation of addition and subtraction on the DC sources. This system also utilizes multiple carrier sinusoidal pulse width modulation technique (MCS-PWM) for operating the switches. It is found that the number of switches required for proposed modular bridge ACMLI and modified H bridge ACMLI was lesser than the traditional Cascaded H bridge Multilevel Inverter (CHB-MLI). It is also evident that the number of DC voltage sources and filter required for smoothing the output waveform is reduced compared to the traditional MLI. The Total Harmonic Distortion (THD) for the proposed circuit was simulated and analyzed in MATLAB Simulink environment and the results are found to be very less and satisfactory. The proposed circuit can find its application in integrating Renewable Energy Sources (RES) to the utility grid, Electrical Vehicle (EV) , harmonic reduction and so on. The simulation results of the proposed circuits are tabulated and compared with the traditional cascaded MLI.</p>