A New Dynamic Synchrophasor Estimator for Digital Relaying

چکیده مقاله

One of the most important challenges in the modern protective requirements is in security and accuracy in the presence of different fluctuations in the network. Therefore, techniques with faster and more accurate estimations have to be developed to measure waveform phasors under steadystate and transient conditions. This paper proposes a new least error squares algorithm based on Taylor series to improve the performances of the phasor estimators. The accuracy is improved by using the fundamental phasor estimations and their estimated derivatives of Taylor series for the next step calculation. Then the proposed algorithm is evaluated through several simulations that specified in the Standard IEEE C37.118.1-2011 for different conditions. By using the proposed algorithm, a remarkable result is achieved in the presence of decaying DC component and harmonics. In addition, to demonstrate the performances of the proposed algorithm, a comparison with the conventional algorithms has also been presented.