Investigating The Ability Of Shunt Hybrid Power Filter Based On SRF Method Under Non-Ideal Supply Voltage

ABSTRACT:

SRF Method This study presents the capacity of a self-tuning filter based on the synchronous reference frame method with a fuzzy logic controller for the improvement of the efficiency of harmonic suppression of a shunt hybrid active power filter in an unbalanced distorted and undistorted voltage supply conditions.

LOGIC

The simulation results indicated that the filter with a fuzzy logic controller had a good filtering performance in steady and transient states, irrespective of whether the voltage supply is distorted or unbalanced.

SOFTWARE: MATLAB/SIMULINK

CONTROL DIAGRAM:

Figure 1. SRF control strategy with STF based on SHAPF.

EXPECTED SIMULATION RESULTS:

Figure 2. SHAF response under ideal voltage situation (a) Source voltage (Vs), (b) Load current (IL), (c) load current with filter, (d) Filter compensation current ( If) , and (e) DC link voltage of system (Vdc).

Figure 3. THD of current (Is)under ideal voltage supply.

Figure 4. SHAF response under non ideal voltage situation (a) Source voltage (Vs), (b) Load current (Il), (c) load current with filter, (d)Filter compensation current ( If), and (e) DC link voltage of system (Vdc).

CONCLUSION:

This paper investigated the effectiveness of a synchronous reference frame (SRF) with a self-tuning filter (STF) control strategy in controlling the performance of a three-phase SHAPF system under conditions of non-ideal and balanced supply voltage. The fuzzy logic controller was utilized for the adjustment of the DC voltage.

SHAPF

The performance of the SHAPF system was investigated under a dynamic and steady state and under different load operating conditions. The simulation results showed the SAPF to have successfully reduced current harmonics to about 1.7 and 2.7 % for both cases of source voltages.

REFERENCES:

[1] Eltawil, M.A. and Zhao, Z., 2010. Grid-connected photovoltaic power systems: Technical and potential problems—A review. Renewable and Sustainable Energy Reviews, 14(1), pp.112- 129.

[2] Bhat, A.H. and Agarwal, P., 2008. Three-phase power quality improvement ac/dc converters. Electric Power Systems Research, 78(2), pp.276-289.

[3] Wagner, V.E., Balda, J.C., Griffith, D.C., Mceachern, A., Barnes, T.M., Hartmann, D.P., Phileggi, D.J., Emannuel, A.E., Horton, W.F., Reid, W.E. and Ferraro, R.J., 1993. Effects of harmonics on equipment. IEEE Transactions on Power Delivery, 8(2), pp.672-680.

[4] Mohamed, M.A., 2015. Design of shunt active power filter to mitigate the harmonics caused by nonlinear loads (Doctoral dissertation, Universiti Tun Hussein Onn Malaysia).

[5] Soomro, D.M. and Almelian, M.M., 2015. Optimal design of a single tuned passive filter to

mitigate harmonics in power frequency.

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