• Penumathsa Manasa
• K.Narasimha Rao
• D.Bala Bhaskar

One of the most important concerns in the power system network is harmonics, which is mainly developed with the huge usage of non-linear loads and power electronic equipment. These harmonics lead to damage in the supply system. Therefore, to protect the supply system, shunt active power filters (SAPF) are being used because of their ability to fulfill the harmonic demand of the non-linear loads. But, the performance of SAPF depends on the control strategies which plays a vital role in mitigation of power quality issues. There are different traditional control strategies/techniques like Instantaneous Reactive Power Theory(P-Q theory) for mitigation of harmonics but they are unable to reduce harmonics to an ideal level under non-sinusoidal supply voltage conditions. This paper presents a comparative study of the traditional technique with an improved/modified technique i.e. Modified Synchronous Reference Frame Theory/(Id-Iq theory) which mitigates the harmonics in the system under different source voltage conditions. The system has been modeled and simulated using MATLAB/SIMULINK and the results are validated with IEEE Std. 519-1992.

Harmonics, Shunt Active Power Filter, Instantaneous Reactive Power Theory, Modified Synchronous Reference Frame Theory.

"MITIGATION OF HARMONICS USING SHUNT ACTIVE POWER FILTER IN THE DISTRIBUTION SYSTEM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.1513-1519, July-2018, Available :http://www.jetir.org/papers/JETIRC006260.pdf

"MITIGATION OF HARMONICS USING SHUNT ACTIVE POWER FILTER IN THE DISTRIBUTION SYSTEM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp1513-1519, July-2018, Available at : http://www.jetir.org/papers/JETIRC006260.pdf