NDLI: PLL-Less One-Cycle Controlled Modified Load Compensator for Wide Range of Loads

Content Provider	IEEE Xplore Digital Library
Author	Chatterjee, K. Chandra, A. Al-Haddad, A.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. Eng., IIT, Mumbai (Chatterjee, K.)
Abstract	Load compensators utilizing the principle of STATCOM are becoming more and more popular. Among the direct and indirect current control techniques, direct current control techniques are more popular as they offer better transient response and higher current control bandwidth. However, the aforementioned techniques require the service of a PLL to generate the current reference template. Presence of the PLL reduces the robustness of the controller. Although schemes based on instantaneous reactive power theory do not require the service of a PLL, they fail to perform if the utility voltages are distorted and/or unbalanced. As a result schemes based on one-cycle control are becoming more and more popular. These schemes do not require the service of reference current template and hence the PLL which makes them robust so far as the presence of distortions in the utility voltages are concerned. However, these schemes give rise to instability problem in current control if the real component of the load current falls below a certain level or if the nature of the load is regenerative. In this paper a modified one-cycle controlled load compensator is proposed which significantly improves the stability margin of its operation so that it can negotiate loads having low real current component as well as regenerative loads. The compensator has been developed for both single phase as well as three phase applications. The viability of the scheme is ascertained through detailed simulation studies
Starting Page	2322
Ending Page	2326
File Size	618596
Page Count	5
File Format	PDF
ISBN	0780390334
DOI	10.1109/PESC.2005.1581956
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-16
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase locked loops Current control Voltage control Pulse width modulation Automatic voltage control Reactive power Power harmonic filters Transient response Robust control Load management
Content Type	Text
Resource Type	Article

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