Transient State Estimation for Transmission Systems

As measurement and communication technology improves algorithms are being developed to get more useful information from the recorded data. One such technique is transient state estimation (TSE) which estimates the node voltages at unmonitored location from current and voltage waveforms measurements recorded during a transient event. This is useful for determining the sources of disturbances. One of the previous limitations was the lumped representation of transmission lines which limited its application to distribution systems. This paper presents a new distributed parameter transmission line model using numerical integrator substitution approach for modelling the travelling wave transmission line model. The accuracy of the model is investigated for different scenarios. To do so, the proposed algorithm is applied to two test transmission systems. The results show that a good estimation is obtained with the proposed algorithm when long transmission lines are present in the system being estimated.