The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a unified selective harmonic compensation strategy using DG-interfacing inverter with LCL filter in the presence of nonlinear local loads for both grid-connected and islanded microgrid. Compared with the existing harmonic compensation methods in the literature, the proposed strategy consists of a triple-control-loop in the grid-connected mode to compensate the grid current harmonics...
Harmonic voltage compensation of the load connected to the point of common coupling (PCC) by using a series of active power filter (SAPF) based on a single phase cascaded multilevel inverter is proposed. The proposed multilevel inverter are presented in detail. The inverter has the ability of acting as a harmonic source when the reference is a non-sinusoidal signal. To achieve this, a simple control...
Distributed generation (DG) has been considered as an alternative source of power generation, especially in stand-alone applications, where both single- and three-phase loads must be supplied with fixed amplitude and frequency sinusoidal voltages. Therefore, the presence of the neutral wire is inevitable. A four-leg inverter is a common solution to connect DGs to stand-alone loads as well as providing...
A topology of series active power filter (SAPF) based on a single phase half-bridge cascaded multilevel inverter is proposed to compensate voltage harmonics of the load connected to the point of common coupling (PCC). The main parts of the inverter are presented in detail. Any voltage reference can be easily obtained by a simple control with the proposed inverter. Therefore, the inverter acts as a...
In this paper, the details of the implementation of a multilevel dc-link inverter (MLDCLI), suitable for standalone application is presented. The first stage of the MLDCLI is a multilevel dc-link to provide a stepped dc voltage waveform approximating the shape of a rectified sine wave. This rectified sine wave is then inverted after every alternate cycle by a conventional single phase full bridge...
Delivering quality power is the important issue of grid connected solar photovoltaic (PV) system. The generation of quality power from the proposed system is influenced by the intermittent nature of solar photovoltaic power, power electronic converters used and the nonlinear loads connected to the system. To understand and analyze the system an accurate modeling is required. This paper deals with...
In this paper, Design and development of control circuit algorithm of 3-Φ Voltage Source Inverter (VSI) using Unipolar Sinusoidal Pulse Width Modulation (SPWM) techniques is proposed using STM32F407VGTx discovery board interfaced with MATLAB Simulink Environment. For implementing 3-Φ VSI, this method is most useful as it will eliminate complexity of control circuit algorithm occurred due to analog...
This paper deals with the study and simulation of photovoltaic (PV) inverter for stand-alone applications. The system is composed of a PV array feeding RL load through a dc-dc boost converter and three-phase inverter. To assess the system performance, simulations based on hybrid co-simulation approach are performed. At the outset, the PV model is elaborated using Pspice, verified and compared with...
In this paper the performance of Unified Power Quality Conditioner (UpQC) has been discussed for a Grid-connected Photovoltaic System. The described methodology focuses on Constant Sinusoidal Current Control Strategy based simulation of UPQC. The proposed methodology guarantees sinusoidal current to be drawn from the supply system even in case of non-linear loads. The system performance under variable...
Climate change concerns have prompted significant interest in generating electricity from renewable resources. Due to decreasing photovoltaic (PV) system costs, PV generation is now becoming more widely deployed throughout the distribution network in Ireland. To study the potential impacts resulting from high penetration levels of residential PV installations, this paper presents the dynamic response...
Solar sources require using power converters introducing harmonics in the output waveforms. Data used is the solar radiation and temperature in Halifax, Nova Scotia, Canada. In this work we studied the effect of changing the blanking angle of the square-wave inverter with 60Hz switching. The harmonics are evaluated for various temperatures and solar radiation for the optimum firing angle. Also probability...
Recently, global attention to distributed generation (DG) is increasing due to their potential advantages and merits. Between various sources, microturbines (MTs) as one of the most reliable have a significant contribution in this regard. This paper is presented dynamic modeling of a microturbine generation (MTG) system with a new passive filter topology. MTG configuration is consists of a permanent...
The renewable energy resources provide us with green energy and flexible integration into power grids, but due to their variable nature, they cause significant frequency, voltage and power fluctuation for power system so that a sophisticated control strategy is needed to cope with these challenges. In this paper, the proposed control strategy consists of inner voltage and current controller and outer...
The design of a complete photovoltaic (PV) system and the precise evaluation of its performances under different conditions requires the use of an accurate simulation model. In this work, a SPICE model of a complete PV system, including a detailed model of PV cells and a multilevel inverter with load and energy storage elements, is presented. The simulation of the system as a whole allows determining...
The use of renewable energy sources for the generation of electricity is been extensively used these days due to many aspects like to reduce pollution, to meet load demands, extinction of conventional fuels and many more. This paper gives a detailed analysis of grid connected renewable source in a three phase four wire distribution system with power quality improvement feature. Power quality is necessary...
Power quality in distribution system is one of the chief concerns in the modern industrial and commercial applications. Power quality problem is an occurrence manifested as a non-standard voltage, current or frequency that results in a failure of end user equipments. However critical problems in power quality have been recognized such as transients, sags, swells and harmonic distortions. Out of these...
This paper presents a model-based predictive control scheme for a dual-output Nine-Switch Inverter (NSI) with output filter. The conventional Pulse Width Modulation (PWM) method for NSI control is very complicated, it requires a multi-loop control scheme and implementation incurs high computational costs. Conversely, the proposed predictive control scheme is simple and controls two the three-phase...
Rooftop Solar Photovoltaic (PV) systems installations have been increasing in the Low voltage distribution networks due to decreased cost and government incentives (e.g. feed-in-tariff). The high penetration of these PV systems can inject harmonics into the network causing problems to sensitive loads and controllers of loads. Due to the solar irradiation dependency, the power generation is variable...
The high penetration of photovoltaic systems in low voltage distribution networks can cause power quality problems due to the increased level of harmonics. In this paper an overview of the relevant power quality standards is provided along with an investigation of the harmonics generation in LV networks. Hardware experiments of harmonics measurements of PV inverters are conducted where the influence...
The multilevel inverters are becoming highly popular in high power and medium voltage applications. This paper presents the method of reducing the THD in load current and voltage using a novel multilevel inverter topology. This novel topology uses less number of switches then the conventional multilevel inverters. The switching method used here is Selective Harmonic Elimination. A LC filter is used...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.