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Harmonic pollution has a major detrimental effect on the power quality of low voltage distribution networks as a result of the proliferation of non-linear loads. The filter injects compensating current equal to the harmonic current needed by non-linear loads at the point of common coupling. Progressive harmonic compensation can be achieved by using shunt active filters at the metering point of each non-linear consumer. This paper proposes a modification in the control scheme of filter based on resistive load synthesis approach. The analysis of the proposed method is carried out in MATLAB Simulink. The control algorithm is used to calculate the filter current by identifying the harmonic current contribution of source at each consumer location. The efficiency of the suggested method in enhancing power quality of system is validated by real time simulation using OPAL-RT.
Gopalapillai et al. (2024) studied this question.