ABSTRACT:
This
paper
present analysis of hybrid active power filter with synchronous reference frame
control algorithm. The proposed topology consist of active power filter and
passive power filter are connected in shunt with the mains feeding a nonlinear
load. The shunt passive power filter is tuned to eliminate most dominate 5th
order load current harmonic. The shunt active power filter is used compensate
all other higher order load current harmonics. This approach help toreduce the
overall rating of shunt active power filter, and maintain unity power factor at
line side with low THD, which makes system more economical for industrial
usage. Detail design steps for 5th order tuned filter is also discussed and
results are presented. The proposed shunt active power filter is also tested
for dynamic loading condition. Hardware results for the verification of
proposed control algorithm is also presented and discussed.
KEYWORDS:
1.
Hybrid Active
Filter
2.
Passive
Filter
3.
Total
Harmonic Distortion
4.
Synchronous
Reference Frame
5.
Unity Power
Factor
SOFTWARE: MATLAB/SIMULINK
Fig.
1: Main Power Circuit Diagram of HAPF
EXPECTED SIMULATION RESULTS:
Fig.
2: Simulation Result ofSPPF (a) Phase-A Output Load Current
without
Compensation (b) Phase-A Source Current with Compensation
(c)
Phase-A 5th Order Harmonic Current
(d)
Phase-A Source Voltage and Source Current
Fig.
3: FFT Curve ofSPPF (a) FFT of Output Load Current without
Compensation
(b) FFT o f Source Current with Compensation
Fig.
4: Simulation Result of SAPF Under Fixed Load (a) Phase-A Output
Load
Current without Compensation (b) Phase-A Source Current after
Compensation
(c) D C Bus Voltage Across Capacitor (d) Phase-A Actual
Compensating
Current (e) Phase-A Source Voltage and Source Current
Fig.
5: Simulation Result ofSAPF under Dynamic Load (a) Phase-A
Output
Load Current without Compensation (b) Phase-A Source Current
after
Compensation (c) Phase-A Actual Compensating Current (d) DC
Bus
Voltage Across Capacitor
Fig.
6: Hysteresis Controller Results (a) Reference and Actual
Compensating
Currents of Phase-A (b) Line-Line Voltage oflnverter
Fig.7:
FFT Curve of Source Current after Compensation by using SAPF
(a)
under
Fixed Load (b) under Dynamic Load
Fig.
8: Simulation Result ofHAPF(a) Phase-A Load Current without
Compensation,(b)
Phase-A Source Current with Compensation,
(c)
Phase-A Phase Voltage and Current, (d) DC Link Voltage oflnverter,
(e)
Phase-A Actual Compensating Current
Fig.
9: Simulation Result ofHAPF (a) Three Phase Output Load
Current,
(b) Three Phase Load Current, (c) Three Phase Source Current,
(d)
FFT Curve of Source Current with Compensation
CONCLUSION:
This
paper analyze the performance and simulation of hybrid active power filter
(HAPF). Through the simulation analysis, this paper verified the mitigation of harmonic,
to achieve unity power factor with reduced rating of SAPF. Proposed control
technique is able to give fast dynamic response during variable load condition,
which demonstrate the robustness of controllers. The proposed topology is an
effort to provide cost effective solution for harmonic elimination in various
industrial application
REFERENCES:
[I]
B. Singh, V. Verma, A. Chandra and K. AI-Haddad " Hybrid filter for power
quality improvement" IEEE proc. Gener. Transm. Distrib. , Volume:152,
No.3 , May 2005.
[2]
J. Arrillaga and N. R. Watson, Power System Harmonics, 2nd ed. Hoboken, NJ:
Wiley, 2003
[3]
B. Singh, K. AI-Haddad, and A. Chandra, " A reviewof active filter for
power quality improvement," IEEE Trans. Ind. Electron. , Vol. 46,
nO.5 pp. 960-971 , Oct.l999.
[4]
H. Akagi, " Active harmonic filters" Proc. IEEE, vol. 93, no.
12, pp.2128-2141 , Dec. 2005.
[5]
K. K. Shyu, M. Yang, Y.M. Chen, and Y.F.Lin, "Model reference Adaptive
control design for a shunt active po we filter systems," TEEE Trans.
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