The concept of using phasors to describe power system operating quantities dates back to 1893 and Charles Proteus Steinmetz’s paper on mathematical techniques for analyzing AC networks. More recently, Steinmetz’s technique of phasor calculation has evolved into the calculation of real time phasor measurements that are synchronized to an absolute time reference. Although phasors have been clearl...

The availability of accurate data is fundamental for several monitoring and control applications modern power grids. Nevertheless, the knowledge critical data, such as transmission line transformer parameters, often affected by uncertainty. This can lead to important problems in correct management systems. In spite a infrastructure that being renewed due new generation devices providing synchro...

A facility has been developed for the determination of the ratio of pulse high voltage dividers over the range from 10 kV to 300 kV using comparative techniques with Kerr electro-optic voltage measurement systems and reference resistive voltage dividers. Pulse voltage ratios of test dividers can be determined with relative expanded uncertainties of 0.4 % (coverage factor k = 2 and thus a two st...

The aim of this paper is to assess the capability of the emerging synchronized phasor measurement technology in improving the overall stability of the Hydro-Quebec’s transmission system through supplementary modulation of voltage regulators. Following a thorough singular value and eigenvalue analysis of the system dynamic interactions, five control sites consisting of four generators and one sy...

This paper investigates the punch-through phenomenon in SiC Schottky Barrier Diodes (SBD) from capacitance–voltage (C–V) characteristics at high reverse bias voltage. High voltage bias application has not been possible by conventional measurement instrumentation. The authors, therefore, develop C–V characteristics measurement instrumentation which enables the application of high dc bias voltage...

There are fewer problems encountered with optical voltage transducers in comparison with their inductive and capacitive counterparts. Although capacitive and inductive transformers are used vastly for the purpose of measurement and protection in the networks, they cause problems such as core saturation and improper transient responses which decrease the accuracy of measurement and eficiency of ...

State estimation has been introduced to power systems and implemented in the 60s, using a single frequency, balanced and symmetric power system model under steady state conditions. This implementation is still prevalent today. The single frequency, balanced and symmetric system assumptions have simplified the implementation but have generated practical problems. This paper examines these simpli...