Novel control strategy of three phase grid tied inverters for power quality improvement


B. Chandrasekhar
Sanjay Lakshminarayanan
S. Sudhakara Reddy


Renewable energy sources (RES) are being increasingly connected in distribution systems utilizing power electronic converters. This paper presents an advanced control strategy for achieving maximum power quality benefits from the grid interfacing inverters when installed in 3-phase distribution systems. The grid tie inverter can be utilized as i) Power converter to inject power generated from RES to the grid and ii) shunt active power filters to compensate current imbalance, load current harmonics, reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. This control concept is clearly explained with MATLAB/SIMULINK simulation results and THD is less than 5%.


How to Cite
Chandrasekhar, B., Lakshminarayanan, S., & Sudhakara Reddy, S. (2014). Novel control strategy of three phase grid tied inverters for power quality improvement. Power Research - A Journal of CPRI, 775–784. Retrieved from


  1. J M Guerrero, L G de Vicuna, J Matas, M astilla and J Miret, “A wireless controller to enhance dynamic performance of parallel inverters in distributed generation systems,” IEEE Trans. Power Electron., vol. 19, no. 5, pp. 1205–1213, Sep. 2004.
  2. J H R Enslin and P J M Heskes, “Harmonic interaction between a large number of distributed power inverters and the distribution network,” IEEE Trans. Power Electron., vol. 19, no. 6, pp. 1586–1593, Nov. 2004.
  3. U Borup, F Blaabjerg, and P N Enjeti, “Sharing of a nonlinear load in parallelconnected three-phase converters,” IEEE Trans. Ind. Appl., vol. 37, no. 6, pp. 1817– 1823, Nov./Dec. 2001.
  4. P Jintakosonwit, H Fujita, H Akagi, “Implementation and performance of cooperative control of shunt active filters for harmonic damping throughout a power distribution system,” IEEETrans. Ind. Appl., vol. 39, no. 2, pp. 556–564, Mar./Apr. 2003.
  5. J P Pinto, R Pregitzer and J L Afonso, “3-phase 4-wire shunt active power filter with renewable energy interface,” IEEE Renewable Energy & Power Quality, Seville, Spain, 2007.
  6. F Blaabjerg, R Teodorescu and A V Timbus, “Overview of control and grid synchronization for distributed power generation systems,” IEEE Trans. Ind. Electron., vol. 53, no. 5, pp. 1398–1409, Oct. 2006.
  7. J M Carrasco, L G Franquelo, J T Bialasiewicz, J I León, and N M Alfonso, “Power electronic systems for the grid integration of renewable energy sources: A survey,” IEEE Trans. Ind. Electron., vol. 53, no. 4, pp. 1002–1016,Aug. 2006.
  8. B Renders, K De Gusseme, W R Ryckaert and M H J Bollen, “Distributed generation for mitigating voltage dips in low-voltage distribution grids,” IEEE Trans. Power.Del., vol. 23, no. 3, pp. 1581–1588, Jul. 2008.
  9. V Khadkikar, A Chandra and T D Nguyen, “Application of UPQC to protect a sensitive load on a polluted distribution network,” in IEEE Power Eng. Soc. Gen. Meeting, 2006, pp. 867–872.
  10. M Singh and A Chandra, “Power maximization and voltage sag/swell ridethrough capability of PMSG based variable speed wind energy conversion system,” in Proc. IEEE 34th Annu. Conf. Indus. Electron. Soc., 2008, pp. 2206–2211.