Improved power quality monitor placement using innovative indices

Approach to fitting parameters and clustering for characterising measured voltage dips based on two‐dimensional polarisation ellipses

“…Traditionally, most have been based on root mean square (rms)‐voltage evolution because existing voltage dip research and detection systems have focused on the amplitude, duration, and related curve of a single event [9, 10, 11]. Even recent contributions – which have focused on detecting the location of the voltage dip source – characterise voltage dips by considering only two main characteristics: their duration and depth [12]. An estimation of the time interval taken around the residual rms‐voltage value was proposed by Honrubia‐Escribano et al [13] as an additional parameter to characterise the severity of a voltage dip.…”

Optimized allocation of power quality monitors in transmission systems: A multiobjective approach

“…However, they differ in the constraints considered to fulfill different criteria. For examples, in [4][5][6][7][8][9][10][11], the constraints are obtained by using analytical expressions and simulating faults in the EPS. These procedures were adopted to ensure full coverage of voltage sags.…”

Alocação otimizada de medidores em sistemas de distribuição visando à redução da múltipla localização de faltas

“…Então, assume-se também que o sistema de monitoramento será composto de uma infraestrutura de comunicação, de tal forma que o sistema localizador de faltas seja capaz de obter em tempo real as medições de todos os PQMs otimamente instalados. A simulação das faltas elétricas é executada por meio de expressões analíticas visando chegar em matrizes que representem a tensão durante a falta, assim como em (OLGUIN; VUINOVICH; BOLLEN, 2006; HAGHBIN; FARJAH, 2009; ESPINOSA-JUAREZ; HERNANDEZ; OLGUIN, 2009;MAZAHERIFAR, 2013;KEMPNER;SANTOS, 2014;MARTINS et al, 2016;BERTHO et al, 2016;KEMPNER;GOMES, 2017;BRANCO et al, 2018;MARTINS et al, in press).…”