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.
Phase Shifted Pulse Width Modulation(PS-PWM) and Level Shifted Pulse Width Modulation(LS-PWM) are two well known techniques for switching multilevel converters. PS-PWM is generally preferred for cascaded multilevel inverters as it ensures equal power distribution and equal switching frequency on all the switches within a given module. This technique however suffers from lack of optimal switching....
This paper presents output voltage control scheme for standalone wind energy systems using self excited induction generator. Nowadays the energy need is depend upon conventional sources but the disadvantage of conventional sources are limited availability and high cost. So the use of non conventional sources must be increased as it is freely available in more amounts. One of the available source is...
With the increase in the power demand and limited fossil fuels the renewable energy source plays a vital role to overcome these challenges. This paper presents a speed control of BLDC motor using synchronous Zeta converter for stand-alone PV system. To harvest the electrical energy generated from the PV modules requires MPPT technique to increase the maximum throughput. In the proposed system Perturb...
This paper reveals the performance of brushless dc motor with sinusoidal pulse width modulation and space vector pulse width modulation. Conventionally sine PWM method is used for the BLDC drive operation because of its easy implementation. But, the efficiency of system becomes less. Recent development in the field of semiconductor and power electronics technology provides different PWM methods. Out...
This paper discuss about a bridgeless CUK converter configuration which resolves the problem of power factor for Induction motor (IM). The current path is designed with two switches only which reduce the conduction losses. The topology is designed in discontinuous current mode to improve the power factor and to reduce current stress in input side. Since, IM motor is driving from a 3Φ AC voltage supply;...
This paper presents a bidirectional inverter using artificial neuro-fuzzy interface system ANFIS. The applications of this proposed topology is to maintain a constant speed in three phase induction motor for locomotives. Nowadays power electronic inverters are popular for industrial applications to drive various AC loads. In this paper a new approach is presented to implement the ANFIS in bidirectional...
In this project work, two stage buck converters and one Current fed push pull converters are used. Here the stage two converters is used as a pre regulator to reduces the voltage stress of push pull switches. In addition, it is sufficient to modulate the width of the pulse fed to buck stage while maintaining the pulse width of the switches of push pull stage constant. In this work, a current fed push...
(SHE) Selective Harmonic Elimination technique is becoming an extensively investigated option for legacy other modulation methods. Priorin addition to present efforts shown vital conventions which impose production output one portion proportion, most probably for decreasing the struggle on its subsequent calculations. Though, the sector-wave identic deductions are not required. This hampers its resolution...
The rapid developments in solar energy conversion technologies, researchers emerged with an idea of live evacuation of energy into the grid using PV modules. Standalone systems are designed for sensitive AC loads which require pure sine wave as input. According to the simulation results in Power SIM simulator, this paper proposes A Novel Transformer Less SPWM Inverter using DC-DC Boost Converter with...
The paper presents a novel converter for a medical X-ray machine application. A resonant, current fed inverter is proposed. The high voltage transformer step up ratio is kept very low to reduce the effects of its leakage inductance and other non-idealities. Moreover this leakage inductance and the parasitic capacitance of HV transformer and switches are used as resonating components for attaining...
A new transformerless Photo voltaic inverter with bidirectional capability has been developed using the concept of High Frequency Leg (HFL). The size of the filter elements is reduced as high switching frequency is employed. The power handling capacity of the inverter is increased as the number of legs in the circuit is increased. The ripples in the inductor current is also reduced and the efficiency...
When the medium and high power applications are concerned, we are in need of multilevel converters. These converters can provide enticing solution for the renewable energy conversion. Developing high voltage rating converters of more than 6.6kV is a key goal for solar energy based industries. The utmost power capacity of the photovoltaic plants has extremely inflated over the past few years and it's...
The converter with high voltage gain is used for photovoltaic application. This paper presents quadratic boost converter incorporated with coupled inductor, voltage doubler cell and clamped circuit. This converter is used for stepping up the voltage of photovoltaic system. The coupled inductor primary side is connected to the capacitor of clamped circuit which reduces the voltage stress of power switch...
A Bi-directional parallel DC-AC and AC-DC resonant High frequency AC link power conversion system with non-isolated topology is designed and simulated in this paper. The results of forward and reverse flow of power are discussed in this paper. Increase in switching frequency decreases the switching losses and results in the improvement of overall efficiency. Under constant frequency 50Hz the filter...
Resonant Converters have wide applications as they can produce a high voltage. Also these converters can reduce the switching losses by operating at Zero Current Switching and Zero voltage switching states. Series Resonant Converter can be used for low output current and Parallel Resonant converter can be used for high output current applications. Series Parallel Hybrid Resonant converters combines...
This paper proposes a Bridgeless (BL)-canonical change cell (CSC) converter for brushless DC (BLDC) motor drive to improve the power factor. The Cuk converter and CSC converter are simulated in MATLAB / SIMULINK software. The simulation results shows that the proposed BL-CSC converter gives the higher power factor compared to the Cuk converter. The performance characteristics of the BLDC motor is...
One of the best methods of detecting certain problems which can lead to failure of the transformer is Dissolved Gas Analysis (DGA). For diagnosing fault condition on oil filled insulation, one of the most recent techniques developed is Dissolved Gas Analysis. The chemical analysis of the generated gases is known as Dissolved Gas Analysis or DGA. For DGA, oil sample from the transformer has to be removed...
In AC power systems, to contain short circuit fault currents current limiting devices like; current limiting reactors are employed which not only limit the fault current in the system, relieve stresses on system components as well. In this study, an attempt has been made to weigh techno-commercial aspects of two such devices, namely Current Limiting Reactor (CLR) and Current Limiting Capacitive Reactance...
Optimal power flow based mostly generation approach for congestion management approach has been planned using power flow controllers UPFC. The most purpose is to seek out the optimum location of FACTS controllers during a fourteen bus facility using Simulated annealing (SA) algorithm. Congestion might happen in cable because of lack of co-ordination between generation and transmission utilities. Because...
This paper proposes a new high-voltage gain resonant switched-capacitor dc/dc converter for high-power photo voltaic system. In the proposed system resonant switching transition is achieved. By using this one, system efficiency is increased and losses are reduced. Here higher switching frequency is used for attain the higher power density. The multiphase resonant switched capacitor DC-DC converter...
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.