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Design of Decentralized Load-frequency Controllers for Interconnected Power Systems with AC-DC Parallel Tie-lines and GDB Nonlinearity Using MOEA


Affiliations
1 Dept. of Electrical Engineering, Annamalai University, Annamalainagar-608 002,Tamilnadu, India
 

A new design of decentralized load-frequency controllers for interconnected power systems with AC-DC parallel tie-lines and governor dead band (GDB) nonlinearity using multi-objective evolutionary algorithm (MOEA) is proposed. A HVDC link is connected in parallel with an existing ac tie-line to stabilize the frequency oscillations of the ac system. The proposed control strategy is mainly based on a compromise between integral squared error and maximum stability margin criteria. A two area interconnected thermal power system is considered to demonstrate the validity of the proposed controller. The simulation results show that the system dynamic performance has been improved with increased stability margin when compared to a conventional controller.

Keywords

AC-DC Tie-lines, Governor Dead Band Nonlinearity, Load-frequency Control, Multi-objective Evolutionary Algorithm
User

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  • Design of Decentralized Load-frequency Controllers for Interconnected Power Systems with AC-DC Parallel Tie-lines and GDB Nonlinearity Using MOEA

Abstract Views: 391  |  PDF Views: 135

Authors

S. Ganapathy
Dept. of Electrical Engineering, Annamalai University, Annamalainagar-608 002,Tamilnadu, India
S. Velusami
Dept. of Electrical Engineering, Annamalai University, Annamalainagar-608 002,Tamilnadu, India

Abstract


A new design of decentralized load-frequency controllers for interconnected power systems with AC-DC parallel tie-lines and governor dead band (GDB) nonlinearity using multi-objective evolutionary algorithm (MOEA) is proposed. A HVDC link is connected in parallel with an existing ac tie-line to stabilize the frequency oscillations of the ac system. The proposed control strategy is mainly based on a compromise between integral squared error and maximum stability margin criteria. A two area interconnected thermal power system is considered to demonstrate the validity of the proposed controller. The simulation results show that the system dynamic performance has been improved with increased stability margin when compared to a conventional controller.

Keywords


AC-DC Tie-lines, Governor Dead Band Nonlinearity, Load-frequency Control, Multi-objective Evolutionary Algorithm

References





DOI: https://doi.org/10.17485/ijst%2F2009%2Fv2i7%2F29491