Monitoring of Power System Events at Transmission and Distribution Level

Abstract

Monitoring of events in the power system provides a great deal of insight into the behavior of the system. Events with impact on the entire power system typically occur in or near the transmission network and are therefore best monitored at transmission system substations. This puts great demands on the equipment and in general restricts the use of the data since it becomes property of the transmission system operator. An alternative is to measure at lower voltage levels. This paper documents the close agreement between voltage and frequency at low and high voltage levels during a remote and a nearby fault in the transmission network. The very high quality of the data suggests that valuable information about the transmission system can be obtained at lower voltages.Index Terms-Power system dynamic stability, power system faults, power system monitoring.

Performance Assessment of Linear State Estimators Using Synchrophasor Measurements

“…Typical examples are power system stability, interarea oscillations, voltage stability, relaying, and real-time SE. PMUs might represent fundamental monitoring tools even in the context of power distribution networks, where they can be used for various applications, such as SE [11], [12], loss of main [13], fault event monitoring [14], synchronous islanded operation [15] and for power quality monitoring [16]. With specific reference to the use of PMUs for SE in distribution networks, the recent literature has discussed the use of this technology not only from the methodological point of view [17] but also via dedicated realscale experimental setups [18], [19].…”

Fourier, Wavelet, and Hilbert-Huang Transforms for Studying Electrical Users in the Time and Frequency Domain

“…It is used to detect failures in the electrical network, to underline the contributions of the distributed generators on the dynamic behavior of the whole system, and, more generally, to optimize the power distribution [1,2]. Nevertheless, the monitoring is not trivial, due to the massive use of non-linear loads and electronic-based equipment in residential, commercial, and industrial plants.…”

Evaluating Frequency Quality of Nordic System using PMU data

“…The frequency data in this paper are measured by PMUs which are developed at Centre for Electric Technology (CET), Technical University of Denmark (DTU) [4,5]. These PMUs are installed in the Eastern Danish power system, which is part of the Nordic system (The Nordic power system consists of Eastern Denmark, Norway, Sweden and Finland).…”