Voltage monitoring and control for enhanced utilization of power grids

Voltage instability detection based on the concept of short circuit capacity

“…Nowadays, due to the capability of obtaining time-synchronized measurements with high accuracy and high sampling rate, the phasor measurement unit (PMU) has been widely deployed into the power systems around the world [12]. Meanwhile, many online voltage instability detection (VID) methods based on PMU measurements [13][14][15][16][17][18][19][20][21] have been developed.…”

“…Most existing works on PMU-based VID methods are based on the impedance matching concept (IMC) [13][14][15][16][17][18][19][20][21]. The basic idea is that the system seen from a load bus can be replaced by an equivalent Thevenin circuit, as shown in Figure 1.…”

“…Early IMC-based VID algorithms [13][14][15][16][17] are mainly based on PMU measurements gathered at a single bus. In those works, the Thevenin equivalent parameters are estimated using two or more consecutive sets of local measurements.…”

Optimal power demand curve: A case study in Universiti Putra Malaysia

“…Nowadays, much literature exists on power demand modeling and analysis, as reported in [4][5][6][7][8][9][10][11]. It seems that the optimizations of the power demand curve [4] as well as forecasting [1] are the subjects of interest in recent years.…”

A proteção de retaguarda para linhas de transmissão aplicando medição fasorial sincronizada

“…Em 2000, um estudo da universidade Sueca Lund Universitet (Leirbukt, 2004) recomendou a implementação da tecnologia de SMFS no sistema nórdico, visando incrementar sua capacidade de transmissão. Este estudo tinha como objetivo estudar a aplicabilidade da tecnologia de SMFS no sistema Nordel.…”