NDLI: Disturbance rejection-based LFC for multi-area parallel interconnected AC/DC system

Content Provider	IET Digital Library
Author	Chen, Chunyu Zhang, Kaifeng Yuan, Kun Gao, Zonghe Teng, Xianliang Ding, Qia
Abstract	AC/DC hybrid system plays an important role in large-capacity and long-distance power transmission. Moreover, load frequency control (LFC) of AC/DC hybrid system is very essential for the safe operation of power grid. Since LFC in essence stems from the power imbalance of the area caused by the variations of the generating and consuming party, this study presents a novel disturbance rejection-based (DRB) LFC scheme to eliminate this power imbalance, thus achieving frequency and AC tie-lie interchange power stability. This study assumes only part of the LFC system states information is measurable and utilises extended states observer to estimate the unmeasurable states including the disturbances. Moreover, then a composite feedback controller is designed utilising both the measurable and observed states information. The proposed DRB LFC schemes retain the structure of the LFC model and sufficiently utilise measurable states information for controller design, which has good engineering applicability compared with robust or intelligent LFC scheme. A multi-area system containing three subareas with parallel interconnected AC/DC link is studied and the simulation results show the effectiveness of the proposed methods.
Starting Page	4105
Ending Page	4117
Page Count	13
ISSN	17518687
Volume Number	10
e-ISSN	17518695
Issue Number	Issue 16, Dec (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/10/16
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.0526
Journal	IET Generation, Transmission & Distribution
Publisher Date	2016-12-08
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Tie-lie Interchange Power Stability AC-DC Hybrid System Composite Feedback Controller Design Control of Electric Power System Control System Analysis Control System Synthesis Disturbance Rejection-based LFC DRB LFC Scheme Electrical Safety Feedback Frequency Control Large-capacity Power Transmission Load Frequency Control Load Regulation Long-distance Power Transmission Multiarea Parallel Interconnected AC-DC System Plant Engineering, Maintenance And Safety Power Grid Power Grid Operational Safety Power Imbalance Elimination Power System Control Power System Economics Power System Interconnection Power System Managemen Power System Operation Power System Stability Power Transmission Control Power Transmission, Distribution And Supply Stability in Control Theory Synthesis Method
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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