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Mahor, Amita
- Performance Analysis of Multilevel Inverters in Fuel Cell Applications
Abstract Views :117 |
PDF Views:0
Authors
Affiliations
1 Department of Electrical & Electronics Engineering, NRI, Bhopal (M.P.), IN
1 Department of Electrical & Electronics Engineering, NRI, Bhopal (M.P.), IN
Source
International Journal of Scientific Engineering and Technology, Vol 1, No 4 (2012), Pagination: 102-106Abstract
As the world's energy use continues to grow, the development of clean distributed generation becomes increasingly important. Fuel cells are an environmentally friendly renewable energy source that can be used in a wide range of applications and are ideal for distributed power applications. A Fuel Cell is a device that electrochemically converts fuel into electricity. The fuel cell uses an electrochemical process which converts the fuel directly into electricity with little energy loss in the form of heat. The static (V-I) characteristics of fuel cells show more than a 30% difference in the output voltage between no-load to full-load conditions. This inevitable decrease, which is caused by internal losses, reduces the utilization factor of the fuel cells at low loads. Additionally, the converters fed by these fuel cells have to be derated to accommodate higher input voltages at low currents. When one of these fuel cells is connected to an inverter, they will not be able to produce ac grid level voltages. A dc-dc boost converter is generally required to boost the voltage level for the inverter. This boost converter, in addition to boosting the fuel cell voltage, also regulates the inverter input voltage and isolates the low and high voltage circuits. In this paper Analysis of cascaded bridge multilevel inverter have with & without pwm techniques have been done & results are also compared based on the harmonics available.Keywords
Fuel Cell, PWM, Harmonics, Converter and Inverter.- Optimal Generation Scheduling of Cascaded Hydroelectric System using Natural Exponential Inertia Weight PSO
Abstract Views :151 |
PDF Views:0
Authors
Nand Kishore
1,
Amita Mahor
2
Affiliations
1 Department of Electrical & Electronics Engineering, NIIST, Bhopal, IN
2 Department of Electrical & Electronics Engineering, NIIST Bhopal, IN
1 Department of Electrical & Electronics Engineering, NIIST, Bhopal, IN
2 Department of Electrical & Electronics Engineering, NIIST Bhopal, IN
Source
International Journal of Scientific Engineering and Technology, Vol 1, No 2 (2012), Pagination: 27-33Abstract
Generation scheduling is a most important task in the operation and planning of power system. It can be on real term, short term, medium term, and long term basis as per the scheduled horizon. Scheduling of purely hydroelectric system differ from the thermal scheduling and hydrothermal scheduling problems in two aspects firstly fuel cost for the thermal part of the system can no longer be used in the objective function. Secondly water availability in seasonal reservoirs is the necessary part of such system. Many researchers suggested different solution algorithms of optimization for each type of problem and claimed better solution. This paper presents a Natural Exponential Inertia Weight Particle Swarm Optimization (NEIW_PSO) approach to determine the optimal generation schedule of hydro power plants of cascaded hydroelectric test system.Keywords
Particle Swarm Optimization, Natural Exponential Inertia Weight PSO, Short Term Generation Scheduling.- Analysis of Impact of Firing Angle on an AC Chopper in Terms of Harmonic Distortion & Power Factor
Abstract Views :118 |
PDF Views:0
Authors
Affiliations
1 Department of Electrical & Electronics Engineering, N.R.I., Bhopal (M.P.), IN
2 Infosys, IN
1 Department of Electrical & Electronics Engineering, N.R.I., Bhopal (M.P.), IN
2 Infosys, IN
Source
International Journal of Scientific Engineering and Technology, Vol 1, No 2 (2012), Pagination: 118-122Abstract
The phase angle controlled AC choppers are widely used for voltage regulation & controlling. Apart from the advantages of method such as low cost I Simple construction, easy operation it has a major disadvantage of inducing Harmonic components & power factor even with pure resistive load. Hence in this paper we are analyzing the various aspects of AC choppers by Simulation & mathematical analysis. The AC chopper considered in this paper is symmetric & the Switching devices are considered to have ideal Switching characteristics for mathematical Analysis. The Simulation & graphical analysis are performed in MALAB/ Simulink.Keywords
AC Choppers, Harmonic Distortion, Power Factor.- Active Power Filter Techniques for Harmonics Suppression in Non Linear Loads
Abstract Views :112 |
PDF Views:0
Authors
Affiliations
1 Department of Electrical & Electronics Engineering, N.R.I., Bhopal (M.P.), IN
1 Department of Electrical & Electronics Engineering, N.R.I., Bhopal (M.P.), IN