Project Presentation on Design and Fabrication Of Shunt Active power Filter Using DQ0 Analysis

1. A FINAL PRESENTATION
ON
“DESIGN AND FABRICATION OF SHUNT
ACTIVE POWER FILTER USING DQ0
ANALYSIS”
Project Members
Anish Lama (071BEL06)
Anmol Shrestha (071BEL07)
Bishesh Thapa (071BEL15)
Niraj Buyo (071BEL29)
Department of Electrical
Engineering,
Khwopa College of Engineering
Project Supervisors
Er. Saroj Twanabasu
Er. Bikram Shrestha

2. Overview
 Introduction
 Problem Statement
 Objective
 Methodology
 Overall Scheme
 Hardware Circuits for SAPF
 Coding and Hardware Synchronization
 Result
◦ MATLAB Simulations and Results
◦ Hardware Results
 Conclusion
 Limitation
 References
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3. Introduction
 Shunt Active Power Filter is used to remove harmonics.
 The principle of Shunt Active Power Filter is to produce
harmonics currents equal in magnitude but opposite in-
phase to those harmonics that are present in the grid.
 Non-linear load produce the harmonics.
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Figure 1: A Typical Diagram of SAPF

4. Introduction (Continued..)
Figure 2 : Characteristics of Linear
Load
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Figure 3 : Characteristics of Non-Linear
Load

5. Introduction (Continued..)
Figure 4 : Harmonics Distortion
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6. Problem Statement
 Harmonic distortion to the system due to
the presence of non-linear load.
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7. Objective
Major Objectives:-
 To design and fabricate the Shunt Active
Power Filter
Specific Objectives:-
 To mitigate the harmonics
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8. Methodology
 Implementation on MatLab Simulink
 Generation of Harmonics due to the non-
linear load in system
 Signal conditioning and estimation of
reference signal using Park transformation
 Generation of Gating Signal using
hysteresis band current controller
 Injection of Current with same magnitude
as that of harmonics current but opposite
in phase from Inverter
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9. Overall Scheme
Figure 5 : Overall Scheme
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10. Hardware Implementation of
SAPF
Figure 6 : Hardware Implementation of SAPF
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11. Hardware Model of Inverter
Fig 7 : Hardware Model of Inverter
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12. Line to Line Waveform of
Inverter
Fig 8 : Line to Line Output Voltage of Inverter
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13. Phase Waveform of Inverter
Fig 9 : Phase Output Voltage of Inverter
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14. Hardware Model of Current
Sensing Unit
Figure 10 : Current Sensing Unit
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15. Waveform of Current Sensor
Figure 11 : Output Waveform of Current Sensor
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16. Hardware Model of Voltage
Sensing Unit
Figure 12 : Voltage Sensing Unit
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17. Waveform of Voltage sensor
Figure 13 : Output Waveform of Voltage Sensor
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18. Hardware Model of Opto-
isolator
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Figure 14 : Hardware Model of Opto-isolator

19. Opto-isolator (Continued..)
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Figure 15 : Output of inverter circuit after feeding signal from opto-isolator

20. Coding and Hardware
Synchronization
 Interfacing of ADC MCP3008 and Raspberry Pi
 Acquiring three phase voltage and current in
Raspberry Pi using sensing unit and ADC
 abc to dq0 conversion of the system current
 Apply Second Order Low Pass Butterworth Filter
 Obtain harmonics element
 Acquire gating signal with the help of harmonic
component current and Hysteresis Band Current
Control Scheme
 Feed anti-phase harmonic current to the system with
the help of three phase inverter
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21. Waveform of Voltage Acquired
By Raspberry Pi
Figure 16 : Waveform of Voltage With Non-Linear Load
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22. Waveform of Current Acquired
By Raspberry Pi
Figure 17 : Waveform of abc Current Without Non-Linear Load
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23. Waveform of Current Acquired
By Raspberry Pi
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Figure 18 : Waveform of abc Current With Non-Linear Load

24. Harmonic Current in Oscilloscope
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Figure 19 : Harmonic Current in Oscilloscope

25. Estimation of Reference Current
Figure 20 : Output Waveform of Reference Current
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26. Gate Pulse for Inverter
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Figure 21 : Gate Pulse for Inverter

27. Overall hardware setup
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Figure 22 : Hardware Setup

28. Results
 Matlab simulation results
 Hardware results
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29. MATLAB Simulation and Results
Figure 23 : MATLAB Simulink Model of Scheme
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30. MATLAB Simulation and Results
Continued..
Fig 24 : FFT Analysis of Harmonics Before SAPF
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31. Fig 25 : FFT Analysis After Use of SAPF
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MATLAB Simulation and Results
Continued..

32. Conclusion
We successfully conducted the project in
Matlab simulation and obtained the THD
as per the IEEE standard. Similarly,
during fabrication of the SAPF we were
able to estimate the reference current and
generate the gating signal by interfacing
Raspberry Pi and Matlab Simulink. But,
we couldn’t inject the anti-phase signal so
as to remove the harmonics in the system.
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33. Limitation
 Not able to inject the signal to the system
to remove the harmonics.
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34. References
 [1] C. Rejil and A. K. R, “Design and Simulation of
Three Phase Shunt Active Power Filter Using SRF
Theory,” vol. 3, no. 6, pp. 651–660, 2013.
 [2] S. M. Shembekar and K. L. Deshmukh, “Analysis
of Reference Current Generation for Shunt Active Power
Filter Using SRF Algorithm to Compensate Harmonic
Current,” vol. 3, no. 2, pp. 93–97, 2015.
 [3] K. V Patel, P. R. Bhavsar, and A. E. Engineering,
“SIMULATION & ANALYSIS OF SHUNT ACTIVE
FILTER FOR POWER QUALITY IMPROVEMENT,”
no. 8, pp. 84–90, 2015.
 [4] “Hysteresis PWM of shunt active power filter based
on prediction harmonic current technique,” J. Next
Gener. Inf. Technol., no. September, 2014.
 [5] O. On, T. H. E. Natural, and F. Composites,
“Chapter 2,” no. 1984, pp. 9–19, 1990.
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