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Fuzzy Logic Controller for Enhancement of Transient Stability in Multi Machine AC-DC Power Systems

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2 Author(s)
M. Uma Vani ; EEE Dept., L.B.R.C.E., Mylavaram, India ; P. V. Ramana Rao

This paper discusses the impact of HVDC on Power System Stability and proposes a new type of control mechanism based on Fuzzy set theory to augment dynamic performance of a multi-machine power system. To have good damping characteristics over a wide range of operating conditions, speed deviation (Δω = error1) and acceleration (Δώ = error3), of the machines are chosen as the input signals to the fuzzy controller. These input signals are first characterized by a set of linguistic variables using fuzzy set notations .The fuzzy relation matrix allows a set of fuzzy logic operations that are performed on controller inputs to obtain the desired output. The effectiveness of the proposed controller is demonstrated by a multi-machine system example. The superior performance of this fuzzy controller in comparison to the conventional fixed gain controller proves the efficiency of this new fuzzy PID controller.

Published in:

Computational Intelligence and Communication Networks (CICN), 2010 International Conference on

Date of Conference:

26-28 Nov. 2010