NDLI: Incremental fuzzy PI control of a HVDC plant

Content Provider	IEEE Xplore Digital Library
Author	Qi, J. Sood, V.K. Ramachandran, V.
Copyright Year	2005
Description	Author affiliation: Concordia Univ., Montreal, Que. (Qi, J.; Sood, V.K.; Ramachandran, V.)
Abstract	This paper investigates a fuzzy logic (FL) based current controller for a high voltage direct current (HVDC) plant connected to a weak AC system under the EMTP RV simulation environment. A typical HVDC system is modeled with a detailed representation of the converter, converter controls and AC system. An incremental fuzzy gain scheduling proportional and integral controller (IFGSPIC) is used for the rectifier current control. The current error and its derivative are taken as two parameters necessary to adapt the proportional (P) and integral (I) gains of the controller based on fuzzy reasoning. Two different fuzzy rule bases are designed to tune the PK gains independently. The fuzzy control rules and analysis of IFGSPIC are presented. To improve performance, the IFGSPIC is designed like a hybrid controller that combines the advantages of a FL and conventional PI controllers. During transient states, the PI gains are adapted by the IFGSPIC to damp out undesirable oscillations around the set point and reduce settling time. During the steady state, the controller is automatically switched to the conventional PI controller to maintain the control stability and accuracy. Performance evaluation under AC fault and set-point step change is studied. A performance comparison between the conventional PI controller and hybrid IFGSPIC is made. Results from the various tests show that the proposed controller outperforms its conventional counterpart in each case
Starting Page	1305
Ending Page	1310
File Size	302212
Page Count	6
File Format	PDF
ISBN	0780393546
DOI	10.1109/CCA.2005.1507312
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-08-28
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fuzzy control Pi control HVDC transmission Automatic control Fuzzy logic Proportional control Voltage control EMTP Control system synthesis Rectifiers
Content Type	Text
Resource Type	Article

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