Parameter estimation of low-voltage distribution systems in transient processes: Algorithm and simulation for RL circuits
A numerical differentiation based algorithm for parameter measurement of low-voltage distribution systems in transient processes is presented in this paper. In a transient process of RL circuit, there is non-periodic component with exponential decay and periodic component of sinusoidal waveform. In any transient processes of RL circuits, the proposed algorithm may not only accurately track the frequency of distribution systems, and estimate the amplitude and phase angle of sinusoidal component, but also estimate the amplitude and time constant of the non-periodic component. The simulation results of a studying example carried out for non-noise cases in Matlab show high accuracy, simple computation and less time, the simulation results carried out for noisy cases and harmonic cases may see acceptable errors, simple computation and less time.
parameter estimation low-voltage distribution systems transient process numerical differentiation