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Optimal and adaptive compensation of voltage and current harmonics under nonstiff-voltage conditions

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2 Author(s)
Rafiei, S.M.R. ; Fac. of Electr. Eng., Shahrood Univ. of Technol., Iran ; Iravani, M.R.

The concept of an optimal and flexible control (OFC) strategy for active filtering has been reported in the literature. The paper demonstrates that, under nonstiff-voltage conditions, due to the source impedance, the OFC strategy performs as a closed-loop adaptive system. This closed-loop system may exhibit poor transient response or even unstable behaviour. Based on source-impedance identification, the paper proposes an improved OFC (IOFC) algorithm to overcome the shortcomings of the OFC. Desirable performance of the IOFC algorithm, based on digital-time-domain-simulation studies in a MATLAB/SIMULINK environment, is also presented. Based on the IOFC algorithm, a new and important harmonic compensation strategy to minimise load-voltage harmonics is introduced and verified.

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Generation, Transmission and Distribution, IEE Proceedings-  (Volume:152 ,  Issue: 5 )