The paper presents the development of a DC motor based Wind Turbine Emulator (WTE) and its performance verification through simulation. The torque signal that represents the actual wind turbine with environmental effect was made to generate at the DC motor shaft. Particularly, the study incorporates the turbine power control strategy including the effect of stochastic and deterministic load components with the shaft dynamics. The WTE with the Wind Energy Conversion System (WECS) is studied to verify the effectiveness of the WTE in the presence of various wind characteristics.
Acrive Power Filrers (APFs) improve the elecrriciry supply by correcting harmonic distortions created by non-linear lodds. It also corrects the poor power-facror resulring from inductive loads. Topologies and control techniques available for APFs are numerous. This paper considers a single phase APF. A scheme rhac requires minimum calculation burden has been selected. T h e system considered, uses an unified constant frequency integrarion control that gives a minimum calculation burden and fasrer response. The control method adapted requires sensing rhe load currenr and DC-link volr~ge only. However, it causes some problems at the integrarion level. The analog integrator gives some i n i t i~l voltage when opel-ated ar high frequencies due ro insblliry to reset the inregcator fully. T o avoid errors due to offset in r h e integrator, an offser feedback is proposed and tested in rhis study. The conrl-ol is siniulared and rhe results 2r.e validxed wirh laboratory esperimrn~al waveforms.
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