Practical Implementation of Delayed Signal Cancellation Method for Phase-Sequence Separation

Author

Svensson, Jan ; Bongiorno, Massimo ; Sannino, Ambra

Author_Institution

ABB Power Technol., Vasteras

Volume

22

Issue

1

fYear

2007

Firstpage

18

Lastpage

26

Abstract

In this paper, the use of a method for online detection of positive- and negative-sequence components of three-phase quantities, named the delayed signal cancellation (DSC) method, is investigated. Problems that arise in practical implementation of the DSC method in computer-controlled systems are investigated. Expressions of the detection error due to nonideal discretization are derived and calculations are verified experimentally. Two methods for reducing the detection error are presented and verified. It is also shown that the given expressions and proposed methods for reducing the detection errors can also be applied to the case of grid frequency variations

Keywords

control engineering computing; power engineering computing; power filters; computer controlled systems; delayed signal cancellation method; grid frequency frequency variations; phase-sequence separation; sequence components online detection; Bandwidth; Computer errors; Converters; Delay; Filters; Frequency; Phase detection; Power conversion; Robustness; Voltage control; Control; filter; measurement; sequence detection; unbalance; voltage-source converter;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2006.881469

Filename

4039479