PI tuning of Shunt Active Filter using GA and PSO Algorithm

International Conference on Advances in Electrical, Electronics, Information, Communication and Bio-Informatics (AEEICB), 2016

ABSTRACT: In this paper p-q theory is used as control technique for active filter which minimizes the lower order harmonics in the power system. This method improves the supply side current quality. The control strategy uses the PI controller for controlling the DC link voltage in the system. The PI controller parameters are selected generally with intuitive method of PI tuning. Iteratively it is identified that PI parameters highly affect in the THD of the system input current. So there is a need of optimal selection of parameters of the PI controller. In this method Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) are used for selection of optimal parameters for PI controller.

KEYWORDS

  1. Active Filters
  2. Genetic Algorithm
  3. Optimisation Techniques
  4. P-q theory
  5. Particle Swarm Optimisation

 SOFTWARE: MATLAB/SIMULINK

 SIMULINK MODEL:

Fig.1 Simulink model of shunt active filter

 EXPECTED SIMULATION RESULTS

Fig.2 current waveform for before compensation

Fig.3 source voltage and source current after compensation for GA

Fig. 4 compensation current and pulses produced by controller

Fig.5 source voltage and source current after compensation for

PSO

Fig.6 compensation current and pulses produced by controller for PSO

 CONCLUSION

The shunt active filter is designed with the optimization algorithms to tune the parameters of PI controllers. The values are selected optimally by using the GA and PSO algorithm. GA requires more converging time compared to PSO due to many operations. PSO converges with lesser THD compared with GA where the number population also less compared to GA. So PSO delivers the best results compared to GA and implementation also simple..

REFERENCES:

[1] Ned Mohan 2002, ‘Power Electronics: Converters, Applications, and Design’ 3rd Edition’, Wiley publications _

[2] Bhattacharya,S Frank,TM, Divan,DM & Banerjee, B 1998, ‘Active filter system implementation’, IEEE Ind. Appl. Mag., 4(5): 47–63. _

[3] Bhattacharya, C. Chakraborty, & Bhattacharya,S 2009, ‘Current compensation in shunt type active power filters’, IEEE Ind. Electron. Mag., 3(3): 38– 49.

[4] Bhim Singh, Kamal Al-Haddad & Ambrish Chandra 1999, ‘A New Control Approach to 3-phase Active Filter for Harmonics and Reactive Power Compensation’, IEEE Trans. on Power Systems, 46(5):133– 138.

[5] Davood yazdani, Alireza Bakhshai & Praveen K.Jain 2010, ‘A Threephase Adaptive Notch filter based Approach to Harmonic /Reactive current extraction and harmonic decomposition’, IEEE Transactions on Power electronics, 25(4): 914-922.

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