Control of Dynamic Capacitor

Industrial plants are faced with stringent requirements by the utility to maintain a near unity power factor. These plants have traditionally utilized switched capacitor banks as a cost-effective means for power factor correction (PFC). However, if there is a significant level of harmonics present i...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on industry applications 2011-01, Vol.47 (1), p.161-168
Main Authors: Prasai, A, Divan, D
Format: Article
Language:English
Subjects:
Active control
Active filter
Active filters
Capacitors
Converters
dynamic capacitor (D-CAP)
dynamic VAR compensator
Dynamical systems
Dynamics
even harmonic modulation (EHM)
Filtering
Filtration
Harmonic analysis
Harmonics
inverter-less active filter (ILAF)
Power factor
power factor correction (PFC)
Power harmonic filters
Reactive power
static synchronous compensator (STATCOM)
static VAR compensator (SVC)
switched capacitor banks
virtual quadrature sources (VQSs)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Industrial plants are faced with stringent requirements by the utility to maintain a near unity power factor. These plants have traditionally utilized switched capacitor banks as a cost-effective means for power factor correction (PFC). However, if there is a significant level of harmonics present in the current that is disturbing the neighboring loads, then a separate unit for harmonic filtering is required as well. By the time a realistic system is configured, significant cost and complexity are encountered. The concept of a dynamic capacitor (D-CAP) was previously introduced as a means by which to achieve dynamic VAR injection as well as active harmonic filtering in one single integrated unit. The topology consists of taking an existing asset like a PFC capacitor, adding a pair of ac switches and small LC components per phase, and thereby realizing an asset with augmented functionalities. Although the power stage is simple, the underlying control is very challenging. This paper discusses the intricacies of controlling such an architecture and provides keen insights into how one would go about designing a controller.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2010.2090318