Power system frequency estimation using linear and nonlinear techniques

Shinde, N (2014) Power system frequency estimation using linear and nonlinear techniques. MTech thesis.



In an electrical power system frequency is an important parameter. The frequency of operation is not constant but it varies depending upon the load conditions. In the operating, monitoring and controlling of electric device power system parameters are having great contribution. So it is very important to accurately measure this slowly varying frequency. Under steady state conditions the total power generated by power stations is equal to system load and losses. Frequency can deviate from its nominal value due to sudden appearance of generation-load mismatches. Frequency is a vital parameter which influences different relay functionality of power system. This study was made to estimate the frequency of measuring voltage or current signal in presence of random noise and distortion. Here we are first using linear techniques such as complex least mean square (LMS), least square (LS) and recursive least square (RLS) algorithm for measuring the frequency from the distorted voltage signal. Then comparing these results with nonlinear techniques such as nonlinear least mean square (NLMS), nonlinear least square (NLS), nonlinear recursive least square (NRLS) algorithms. The performances of these algorithms are studied through simulation.

Item Type:Thesis (MTech)
Uncontrolled Keywords:Frequency estimation; Linear estimation; Nonlinear estimation; Load-generation mismatches; Distorted voltage signal; Power quality.
Subjects:Engineering and Technology > Electrical Engineering > Power Systems
Divisions: Engineering and Technology > Department of Electrical Engineering
ID Code:6132
Deposited By:Hemanta Biswal
Deposited On:27 Aug 2014 17:11
Last Modified:27 Aug 2014 17:11
Supervisor(s):Ray, P K

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