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Title A multi-functional four-leg grid connected compensator
 
Names SAWANT, RR
CHANDORKAR, MC
Date Issued 2007 (iso8601)
Abstract There has been a growing demand on using an active power filter (APF) for grid-connected converter systems based on non-conventional energy sources such as solar, wind and fuel-cells. In addition to power quality conditioning, the APF can also be used for bi-directional active power exchange with the three phase four wire grid and therefore acts as a multifunctional compensator. This paper presents a four-leg, shunt multi-functional grid-connected power quality compensator. The compensator reference currents are generated using the well known instantaneous p-q-r theory. A simple modification in the conventional theory to eliminate the neutral current from the three-phase four-wire power system is proposed. A digital controller is used to implement dead-beat current control. The outputs of the digital current controller are used as reference voltages for a 3D space-vector modulator (3D-SVM). A new approach for PWM waveform generation in 3D-SVM is proposed. The PWM is implemented on a floating point DSP. All the intermediate steps are discussed from the view point of implementation on DSP-FPGA platform. The multi-functional compensator is analysed and simulated for the most practical conditions at the power system and the simulation results are presented.
Genre Proceedings Paper
Topic Space-Vector-Modulation
Identifier 2007 Power Conversion Conference - Nagoya, Vols 1-3,1056-1063