Modified LMF Adaptive Control of Weak AC Grid with High Penetration of Solar Energy

Most of the solar PV plants are remotely located from main grid creating a scenario of integration into weak AC grid and hence poses major Power Quality (PQ) issues which limit the penetration levels. This paper proposes a modified Least Mean Fourth (LMF) based adaptive control algorithm for Distributed Static Compensator (DSTATCOM) connected at Point of Common Coupling (PCC) which mitigates harmonics in grid current and voltages conferring with IEEE- 519 standards, thereby enhancing the penetration level of Solar PV. The proposed algorithm's performance has been validated by a case study where solar PV is integrated to weak AC grid at PCC by simulating unbalanced in load and change in irradiation for different Short Circuit Ratio (SCR) values of weak AC grid. The proposed system is successfully implemented in MATLAB/Simulink environment and obtained results are verified with IEEE-519 and IEEE-929 standard.