high performance inverter

8/12/2019 HIGH PERFORMANCE INVERTER

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By:N.Muzammil Ahmed,

B.Lakshmi,

P.S.Chand Basha,

C.Yaseen,J.Hari Prasad,

Batch.No-1,

Dept. Of EEE,

Dr.KVSRIT.


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The power demands across the world are raising at a

very faster rate.

To satisfy this load demand needs a very high generation

level.The dependance on the conventional methods is causing

the decreament in the natural resources & various other

factors like pollution.

Hence the need of the hour is to generate power inlarge amounts at lower costs and in a eco-friendly manner.


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Distributed generation (DG)is also called on-site generation,

dispersed generation, decentralized generation that

generates electricity from many small energy sources.

The various sources involved may be majorly Renewable Energy

sources which are Solar Panels(PV systems),Fuel Cells,WindEnergy Energy Plants-which are also called as Distributed energy

resource (DER) systems.

The various sources in a DG are interconnected and that interface

is termed as Microgrid.In other words Amicrogridis a localized grouping of electricity

generation, energy storage, and loads.


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Implementing the DG concept reduces

1)Transmission Losses.

2)Transmission Costs.

The power system operates dynamically even in cases ofBlackouts like the JULY 2012 INDIA BLACKOUT which is thelargest

power outage in history.

By feeding the indivisual load area demands the Microgrid

concept reduces the chances of Outages at the event of PeakLoads.


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Schematic Diagram of DG and Microgrid:


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The interconnection between various Distributed energy

resource (DER) systems is made via a common DC grid.

This is made possible by the various Power Electronic Converters.

In order to maintain the reliability of the Power System under the

Heavy Load demands the interconnection of this Microgrid with the

Macrogrid is also necessary.

Thus for this interfacing a High Quality Inverter is required, whichconverts the DC power in the microgrid to AC power and feeds

the Macrogrid.


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In this project, a high-performance inverter, including

the functions of stand-alone and grid-connected power supplies,

is developed.In the stand-alone power-supply mode, the output ac voltage

can supply to ac loads.

In the grid connected power-supply mode the goal is controlling

the amplitude and direction of the output current in the inverter.


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An adaptive total sliding-mode control (ATSMC) scheme is

used for the proposed high performance inverter with a full-

bridge framework.

The project also shows a contrast between ATSMC and theconventional proportionalintegral and proportional

resonant control strategies.

The output voltage has low THD and Higher power factor in

the ATSMC control.


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The total harmonic distortion, or THD, of a signal is a

measurement of the harmonic distortion present.

In power systems, lower THD means reduction in peak currents,

heating, emissions, and core loss in motors.

Infact lower THD implies Higher Efficiency during Operation.


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Output voltage with a low total harmonic distortion in

the stand-alone power-supply mode is achieved .

Output current with a high power factor in the grid-connected

power-supply mode to provide an ac output with high-performance power quality is also achieved.


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http://en.wikipedia.org/wiki/Total_harmonic_distortion

http://www.academia.edu/892145/Analysis_of_Distributed_Gen

eration_Systems_Smart_Grid_Technologies

der.lbl.gov/microgrid-conceptwww.microgrid-solar.com


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