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IMPROVEMENT OF POWER QUALITY O

DISTRIBUTED GENERATION POWER W

DC STORAGE AND SVPWM TECHNIQU

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ABSTRACT:

The aim of this work is to improve the power quality for dis

generation (DG) with power storage system. Here DG is assumed to

wind power generation (WG) and fuel cells (FC), etc. Advantages

system are constant power supply, constant voltage magnitude, abs

harmonics in supply voltage, un-interrupted power supply by using DC

and SVPWM technique. In this project the electric power qualities in tw

will be compared.

Case I: With the storage battery when it is introduced.

Case ii: Without the storage battery.

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INTRODUCTIONOne of the major concerns in electricity industry today is

quality problems to sensitive loads. Presently, the majority of power

problems are due to different fault conditions.

These conditions cause : Voltage sag

a. Tripping

b. Shutdown

c. Miss process of drive system

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1. Wind generator:

2. Fuel cell module:

3.Energy storage unit:

4. SVPWM inverter:

5. Voltage source converter (VSC):

6. Dc/dc converter:

7. Passive filters:

8. 3-phase voltage injection transformers:

THE PROPOSED SYSTEM CONSISTS

FOLLOWING MAIN SECTIONS:

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BLOCK DIAGRAM OF PROPOSED SYS

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THREE PHASE VOLTAGE SOURCE INV

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Space vector pulse width

modulation

Valid switching states

VSI

OPERATION OF VOLTAGE SOURCE INVE

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SPACE VECTOR MODULATION OUTPUT

Output voltage vector in the pla

Output line voltages in time

domain

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MATLAB MODELLING & SIMULATION R

1. Simulation models: with storage

battery2. Simulation mod

storage bat

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SIMULATION RESULTS

Variations in the load

voltage with

fluctuating rlc load

Output wave forms of

voltages when battery

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CONCLUSION

Based on the analysis of test system, it is suggested that volt

are major factors in estimating the DC storage value. The effectiveness

system mainly depends upon the rating of DC storage rating and th

voltage sag. The major role play is that it can be supply constant pow

loads, sag is reduced completely, THD of the system is very less. Th

implementation can be applied to various kinds of loads and systems in f

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Thankyou