www.semargroup.org ISSN 2348–2370 Vol.06,Issue.06, September-2014, Pages:465-472 www.ijatir.org Copyright @ 2014 SEMAR GROUPS TECHNICAL SOCIETY. All rights reserved. Improved Trans Z-Source Inverter with Continuous Input Current and Boost Inversion Capability for Renewable Energy Resources E. TEJASWINI 1 , T. PARMESHWAR 2 , P. NAGESWARARAO 3 1 PG Scholar, Dept of EEE, Vidya Jyothi Institute of Technology, Hyderabad, India, Email: [email protected]. 2 Asst Prof, Dept of EEE, Vidya Jyothi Institute of Technology, Hyderabad, India, Email: [email protected]. 3 Assoc Prof, Dept of EEE, Vidya Jyothi Institute of Technology, Hyderabad, India. Abstract: Energy resources and their utilization are a prominent issue of this century. The problems of natural source depletion, environmental effects and the rising demand for new energy have been fervently discussed in recent years. Some modified impedance source networks are proposed from time to time for increasing the output voltage gain. One such impedance network is Improved Trans Z Source Inverter which has high boost voltage that improves upon the conventional inverters. The proposed Improved Trans Z Source Inverter maintains all the main features of Z Source Inverter with the added advantages like increased voltage gain, reduced voltage stress, continuous input current, boost inversion capability, higher modulation index, lower current ripple etc. This is a novel concept of high step up inverter based on the transformer to improve the input current profile. The Improved Trans Z Source Inverter can suppress resonant current at startup, which might destroy the devices. Keeping in view the above advantages, the proposed concept has topologies that suit solar cell and fuel cell applications and can be extended towards the implementation and analysis with PV cells and fuel cells which account for renewable energy resources and a brief comparison between PV and Fuel cells is also implemented in this paper. Keywords: Improved Trans Z Source Inverter. I. INTRODUCTION The rapidly increasing environmental degradation across the globe is posing a major challenge to develop commercially feasible alternative sources of electrical energy generation. Energy resources and their utilization are a prominent issue of this century. The problems of natural source depletion, environmental effects and the rising demand for new energy have been fervently discussed in recent years. It is believed that the distributed generation market will be more than $30 billion by the year 2015. Due to environmental concerns, more effort is now being put into clean and distributed power like geothermal, wind power, fuel cells, and photovoltaic (PV) that directly uses the energy from the sun to generate electricity. Thus, a huge research effort is being conducted worldwide to come up with a solution in developing an environmentally benign and long-term sustainable solution in electric power generation. The major players in renewable energy generation are photovoltaic (PV), wind farms, fuel cell, and biomass. These distributed power generation sources are widely accepted for micro grid applications. The worldwide grid-connected PV system grows at a rate of 25% every year. As the energy from the sun is free, the major cost of photovoltaic generation is the installation cost, which is mainly composed of the costs of solar modules and the interface converter system, also called the power conditioning system (PCS). A fuel cell combines hydrogen and oxygen to produce electricity, heat, and water. Fuel cells are often compared to batteries. Both convert the energy produced by a chemical reaction into usable electric power. Fig1. PV Array with Dc to Dc Converter. Fig2. Fuel cell with Dc to Dc Converter. With the development of solar cell and fuel cell technologies, the price of their modules has dropped dramatically. To lower the cost of the PCSs has become a
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www.semargroup.org
ISSN 2348–2370
Vol.06,Issue.06,
September-2014,
Pages:465-472
www.ijatir.org
Copyright @ 2014 SEMAR GROUPS TECHNICAL SOCIETY. All rights reserved.
Improved Trans Z-Source Inverter with Continuous Input Current and
Boost Inversion Capability for Renewable Energy Resources E. TEJASWINI
1, T. PARMESHWAR
2, P. NAGESWARARAO
3
1PG Scholar, Dept of EEE, Vidya Jyothi Institute of Technology, Hyderabad, India, Email: [email protected]. 2Asst Prof, Dept of EEE, Vidya Jyothi Institute of Technology, Hyderabad, India, Email: [email protected].
3Assoc Prof, Dept of EEE, Vidya Jyothi Institute of Technology, Hyderabad, India.
Abstract: Energy resources and their utilization are a prominent issue of this century. The problems of natural source
depletion, environmental effects and the rising demand for new energy have been fervently discussed in recent years. Some
modified impedance source networks are proposed from time to time for increasing the output voltage gain. One such
impedance network is Improved Trans Z Source Inverter which has high boost voltage that improves upon the conventional
inverters. The proposed Improved Trans Z Source Inverter maintains all the main features of Z Source Inverter with the added
advantages like increased voltage gain, reduced voltage stress, continuous input current, boost inversion capability, higher
modulation index, lower current ripple etc. This is a novel concept of high step up inverter based on the transformer to improve
the input current profile. The Improved Trans Z Source Inverter can suppress resonant current at startup, which might destroy
the devices. Keeping in view the above advantages, the proposed concept has topologies that suit solar cell and fuel cell
applications and can be extended towards the implementation and analysis with PV cells and fuel cells which account for
renewable energy resources and a brief comparison between PV and Fuel cells is also implemented in this paper.
Keywords: Improved Trans Z Source Inverter.
I. INTRODUCTION
The rapidly increasing environmental degradation
across the globe is posing a major challenge to develop
commercially feasible alternative sources of electrical
energy generation. Energy resources and their utilization
are a prominent issue of this century. The problems of
natural source depletion, environmental effects and the
rising demand for new energy have been fervently
discussed in recent years. It is believed that the distributed
generation market will be more than $30 billion by the year
2015. Due to environmental concerns, more effort is now
being put into clean and distributed power like geothermal,
wind power, fuel cells, and photovoltaic (PV) that directly
uses the energy from the sun to generate electricity. Thus, a
huge research effort is being conducted worldwide to come
up with a solution in developing an environmentally
benign and long-term sustainable solution in electric power
generation. The major players in renewable energy
generation are photovoltaic (PV), wind farms, fuel cell,
and biomass. These distributed power generation sources
are widely accepted for micro grid applications.
The worldwide grid-connected PV system grows at a
rate of 25% every year. As the energy from the sun is free,
the major cost of photovoltaic generation is the installation
cost, which is mainly composed of the costs of solar
modules and the interface converter system, also called the
power conditioning system (PCS). A fuel cell combines
hydrogen and oxygen to produce electricity, heat, and
water. Fuel cells are often compared to batteries. Both
convert the energy produced by a chemical reaction into
usable electric power.
Fig1. PV Array with Dc to Dc Converter.
Fig2. Fuel cell with Dc to Dc Converter.
With the development of solar cell and fuel cell
technologies, the price of their modules has dropped
dramatically. To lower the cost of the PCSs has become a
E. TEJASWINI, T. PARMESHWAR, P. NAGESWARARAO
International Journal of Advanced Technology and Innovative Research