Inderscience Publishers

DSTATCOM topologies for three-phase high power applications

0
- By: ,

Courtesy of Inderscience Publishers

This paper proposes distribution static compensator topologies for application in three-phase high power distribution systems. These topologies overcome both the voltage and current rating constraints imposed by the semiconductor switches by the use of three single-phase multi-secondary transformers. Five topologies, namely, four leg-group, three leg-group split-capacitor, H bridge-group, three leg-group and two leg-group are suggested. These can effectively compensate unbalance, harmonics and low power factor of the load currents. Apart from the use of minimum number of current sensors and a single capacitor, the control circuit is very simple. It provides the electrical isolation and security deemed essential for high voltage systems. A detailed comparison is made for these topologies. Based on the hardware requirement and compensation quality, the four leg-group and three leg-group topologies are shown to be superior than the other structures for application in three phase four-wire and three-wire systems respectively. They are validated through extensive simulation studies using PSCAD in a three-phase four-wire power network with non-linear unbalanced load. Experimental verification is conducted for H bridge-group topology on a single phase system using a DSP-based prototype laboratory model.

Keywords: active power filters, distribution static compensators, DSTATCOM, instantaneous symmetrical component theory, high power transformers, multiple winding transformers, unbalance, harmonics, low power, electrical isolation, security

Customer comments

No comments were found for DSTATCOM topologies for three-phase high power applications. Be the first to comment!