Article

# A DSP Based Optimal Algorithm for Shunt Active Filter Under Nonsinusoidal Supply and Unbalanced Load Conditions

Dept. of Electr. Eng., Indian Inst. of Technol., Mumbai

IEEE Transactions on Power Electronics (Impact Factor: 5.73). 04/2007; DOI: 10.1109/TPEL.2006.890001 Source: IEEE Xplore

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**ABSTRACT:**In order to get an optimum power factor in the load compensation under distorted supply voltages, a new control strategy is proposed in this paper. In this strategy, the conductance factors for the compensated load are evaluated for the specified source current total harmonic distortion (THD) limit. The performance of this method along with perfect harmonic cancellation (PHC) and unity power factor (UPF) strategies is evaluated on a distribution system model developed using PSCAD 4.2.1. The effect of selection of control strategy in damping the harmonic resonance, which is one of the main problems for harmonic propagation in the distribution system, is verified. The simulation results are presented to evaluate the performance of these strategies in load compensation and diminishing the harmonic propagation in the distribution system.Power Systems, 2009. ICPS '09. International Conference on; 01/2009 -
##### Conference Paper: Current harmonics reduction of non-linear load by using active power filter based on improved sliding mode control

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**ABSTRACT:**Nowadays due to remarkable development of power electronic devices the use of nonlinear loads in power systems has significant growth. These loads produce harmonics in network because of their nonlinear nature. For decreasing harmonic level in the grid, active filter is a desirable device. This paper proposes an improved sliding mode control strategy for parallel active filter which is based on voltage source inverter. This method uses the signs of sliding surface and current to control the filter. The target of this strategy is improving the behavior of source's current when it is crossing from zero. The proposed active filter is designed and simulated by MATLAB/Simulink and its performance is studied for a sample load. Simulation results show the prominent of proposed control strategy than the sliding mode control method which is based on the signs of sliding surface and voltage.Power Electronics, Drive Systems and Technologies Conference (PEDSTC), 2013 4th; 01/2013 -
##### Conference Paper: Decoupled recursive-least-squares technique for extraction of instantaneous synchronized symmetrical components under fault conditions

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**ABSTRACT:**This paper presents the decoupled recursive-least-squares (DRLS) technique for extraction of instantaneous synchronized symmetrical components under fault conditions in power grids. The proposed DRLS technique demonstrates outstanding robustness during faults, subsequent circuit breakers operation, and transmission line reclosing. The proposed DRLS technique also significantly reduces the computational burden of the conventional RLS technique for implementation on digital signal processors (DSPs). The performance of the proposed DRLS technique has been evaluated through presetting selected simulation results in MATLAB-Simulink software. DSP implementation of the DRLS technique also confirms considerable computational efficiency improvement in comparison with that of the conventional RLS technique. The DRLS technique also shows better efficiency in comparison with the enhanced phase-locked loop (EPLL) technique under highly distorted power system due to harmonics according to our implementation on two different R&D DSP platforms.IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society; 01/2011

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