A new control scheme for PID load frequency controller of single-area and multi-area power systems

被引:137
作者
Padhan, Dola Gobinda [1 ]
Majhi, Somanath [1 ]
机构
[1] Indian Inst Technol Guwahati, Dept Elect & Elect Engn, Gauhati 781039, India
关键词
LFC; PID; Laurent series; Disturbance rejection; Time delay; Relay feedback identification; ADAPTIVE-CONTROL SCHEME; IDENTIFICATION;
D O I
10.1016/j.isatra.2012.10.003
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
A new control structure with a tuning method to design a PID load frequency controller for power systems is presented. Initially, the controller is designed for single area power system, then it is extended to multi-area case. The controller parameters are obtained by expanding controller transfer function using Laurent series. Relay based identification technique is adopted to estimate power system dynamics. Robustness studies on stability and performance are provided, with respect to uncertainties in the plant parameters. The proposed scheme ensures that overall system remains asymptotically stable for all bounded uncertainties and for system oscillations. Simulation results show the feasibility of the approach and the proposed method improves the load disturbance rejection performance significantly even in the presence of the uncertainties in plant parameters. (C) 2012 ISA. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:242 / 251
页数:10
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