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This study proposes a novel grid-tied power conversion interface that connects a renewable energy source to the utility. The proposed grid-tied power conversion interface is composed of an H-bridge inverter, a selection switch set and a boost power converter. The proposed grid-tied power conversion interface generates a five-level AC voltage. The boost power converter is only operated when the magnitude...
In this paper reactive power compensation using an infinite level inverter based STATCOM is proposed. Nowadays, the society is becoming increasingly dependent on the electrical supply. New equipment's are more sensitive to power quality variations. This causes the transmission line to transfer equal or sometimes more than its capacity, which leads to overloading, voltage fluctuations etc. in the system...
This paper presents the application of a multiple switching pattern selective harmonic elimination on three level inverter. The aim of this work is to eliminate low rank harmonics (3rd, 5th, 7th and 9th) from an AC voltage waveform generated by DC to AC converter and also control the fundamental component, the modulation algorithm is based on the Newton-Raphson method which is one of the simplest...
This paper researches on nonlinear phenomena in H-bridge inverter using current loop proportional control. Stroboscopic map is adopted to build discrete model of the inverter system. The system dynamic bifurcation diagram is obtained according to input voltage E, proportional coefficient K and load resistance R as bifurcation parameter respectively. Folded diagram is used to analysis process from...
This paper presents Series-Parallel Topology (SP) of magnetic coupling system for use in Wireless Power Transfer (WPT) applications. Configuration of the system is composed of rectifier circuit, inverter circuit and resonance circuit. Full bridge inverter circuit is powered by rectifier and its output is connected to the LC series resonant circuit. Moreover, the LC parallel circuit with resistance...
Removing the isolation transformer in grid-connected photovoltaic (PV) inverters is desirable to increase efficiency and reduce the size, weight, and cost of these systems. However, it may also allow leakage current through the stray capacitance between the PV array and ground, causing a safety risk. Both efficiency and leakage current depend upon both inverter topology and modulation strategy. In...
This paper proposes and analyzes the performance of a grid connected multilevel inverter topology with step up transformer for battery and Solar PV (SPV) as a dc source. The simulation is done in SIMULINK/ MATLAB Software. The RMS inverter output voltage at transformer's secondary side is kept slightly higher than the RMS grid voltage and the power transfer to the grid is controlled by controlling...
specific odd harmonics can be mitigated by operating the semiconductor switches in H-bridge inverters at optimized switching angles of the PWM signals. These switching angles can be achieved by deriving a number of nonlinear equations using Selective Harmonic Elimination Pulse Width Modulation (SHE-PWM) method. Modulation index (m) is a significant parameter used to control the amplitude of the fundamental...
In this paper, a new arrangement of seven-level Stepped DC Link Inverter (SDCLI) is proposed. It consists of DC link modules and H-bridge inverter. Compared with Two-Level Inverter (TLI), the SDCLI system generates the output voltage with reduced harmonic content and voltage stress. SDCLI can considerably reduce the switch count as well as gate drivers as the number of voltage levels increases. The...
This paper proposed a Single-Phase 13-level inverter with voltage control method using semiconductor power devices for photovoltaic systems. The multilevel voltage source inverters unique configuration allows them to make high voltages with low harmonics without use of transformers or series associated synchronized switching devices. The general role of the multilevel inverter is to synthesize a desired...
This paper presents a model predictive control (MPC) of five-level H-bridge neutral-point-clamped (NPC) quasi-impedance source inverter (qZSI). The proposed control technique is designed to handle three control objectives with simple and effective approach. The output current, the input current and the capacitor voltage are the control objectives of the proposed MPC algorithm. To fulfill these control...
This paper presents a grid-connected five-level neutral-point-clamped (NPC)/H-Bridge quasi-impedance source inverter (qZSI) and its control scheme for use in PV applications. The proposed topology is combination of a three-phase qZS network and NPC/H-Bridge inverter that is suitable for high power applications. The proposed inverter transfers dc power into the ac power without dc/dc boost converter...
This paper presents the design of a modified Vienna rectifier for single phase power factor correction (PFC) under RL load. This research proposes a newly developed scheme consist of a modified Vienna rectifier for converting AC to DC, a simple control circuit for controlling single phase modified Vienna rectifier switching, a single phase inverter (H-bridge) for converting power from DC to AC, a...
The single phase residential inverter provide backup power during interruption of supply. The present technology of residential inverter cannot able to provide peak load at the time of starting. This paper presents inverter incorporating supercapacitor. The purpose of connecting supercapacitor along with the battery is to reduce the stress and improve the life of battery. And also provide surge power...
Specific odd harmonics can be mitigated by operating the simeconductor switches in H-bridge inverters at optimized switching angles of the PWM signals. These switching angles can be achieved by calculating a set of nonlinear equations using Selective Harmonic Elimination Pulse Width Modulation (SHE PWM) technique. Modulation index (m) is a significant parameter used to control the amplitude of the...
With the emergence of Wireless Power Transfer (WPT) systems in electric vehicle (EV) applications, variety of power electronics converters topologies are implemented. The proper converter design is crucial in these application to be able to handle the high power and frequency operation. This paper presents an optimum design of 40 kHz single-phase H-bridge resonance inverter for wireless EV's charging...
A voltage-controlled, single-phase, five-level inverter for photovoltaic systems using semiconductor power devices is proposed. Use of a unique, multilevel voltage source configuration allows the production of high voltage, low harmonic distortion AC outputs without using transformers or series-associated synchronized switching devices. The typical role of multi-level inverters is to generate the...
A new topology of the high frequency alternating current (HFAC) inverter bridge arm is proposed which comprises a coupled inductor, a switching device and an active clamp circuit. Based on it, new single-phase and three-phase inverters are proposed and their operating states are analysed along with the traditional H-bridge inverter. Multi-phase and multi-level isolated inverters are also developed...
This paper deals with the design of a modified Vienna rectifier for power factor correction under different three-phase load conditions. The whole system consists of a modified Vienna rectifier for converting AC power to DC, a controller for controlling modified Vienna rectifier, an H-bridge inverter, a dual stage buck converter and a T-LCL filter circuit. In this article, we proposed a controller...
The need for a cleaner environment and the continuous increase in energy demands makes decentralized renewable energy production more and more important. Photovoltaic generate electric power when illuminated by sunlight or artificial light. It directly convert the sun's energy into electricity which can be easily transported and converted to other forms for the benefit of society. The role of power...
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