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The use of conventional (single-tuned and high-pass) filters for HVDC systems can be difficult due to the likelihood of resonance caused by single-tuned filters, and considerable power losses in high-pass filters. This paper presents the C-type filter as an alternative to the conventional filtering in HVDC systems, to improve both the power quality and the power factor, and to reduce the power losses...
In this paper, an adaptive neural fuzzy inference system (ANFIS) is employed for the control of a PWM based direct torque control (DTC), driving a dual three-phase induction machine (DTPIM). DTPIM has two sets of three-phase windings spatially phase shifted by gamma (=60deg in this research) electrical degrees. The proposed control scheme uses a fuzzy inference system (FIS) to modulate the phase of...
In this work a fuzzy inference system is employed for the control of a PWM based direct torque control (DTC), driving a dual three phase induction machine (DTPIM). DTPIM has two, three phase windings spatially phase shifted by gamma (=60deg in this research) electrical degrees. The proposed control scheme uses a Fuzzy inference system to modulate the phase of stator voltage vector applied to the DTPIM...
In this paper, a new sensorless vector control technique for six-phase induction machines (SPIM) is presented. The machine has two three phase stator windings spatially shifted by 30 electrical degrees. The classical vector control of SPIM is employed. The proposed sensorless method does not require flux and speed estimators, it uses only difference between stator currents of the mathematical model...
Power system oscillation damping, have always been an undeniable problem for engineers. In this paper we try to show that a supplementary lead-lag controller using wide area signals can greatly decrease the oscillations, because the global signals involve more wide-area oscillation modes. Parameters of this damping lead-lag controller are obtained by phase compensation method. Then an artificial neural...
In this paper a new lead-lag supplementary damping controller is introduced for damping power system oscillations using SVC, which itpsilas gain is controlled with a mamdani type fuzzy logic controller. Here the global signals are used as the input of damping controller, because some of the oscillating modes arenpsilat seen in the local signals. The residue index function method is used to select...
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