A Method for the Design of UFLS Schemes of Small Isolated Power Systems

A UFLS Scheme for Small Isolated Power Systems Using Rate-of-Change of Frequency

“…For that purpose, 26 real generation dispatch scenarios of 2009 have been analyzed. For each scenario, all possible single generator outages have been simulated and for each outage, the amount of load to be shed has been minimized such that frequency does not fall below 47 Hz, that frequency does not stay below 48 Hz for more than 2 s, and that frequency does not exceed 52 Hz (e.g., see [6] and [8]). …”

“…Model parameters, settings of the existing UFLS scheme, and generation dispatch scenarios can be found in [8]. An overall delay of the centralized scheme of 200 ms has been assumed.…”

Optimal System Frequency Response Model and UFLS Schemes for a Small Receiving-End Power System after Islanding

“…The performance of the UFLS schemes, which are designed based on experience, cannot be necessarily guaranteed in the modern power system. So, several optimization methods have been extensively investigated to design UFLS schemes [3,[8][9][10][11][12][13]. To minimize the amount of shed load, both traditional optimization methods and the evolutionary algorithms have been employed to determine the UFLS relay parameters, i.e., frequency thresholds, step sizes, and time delay.…”

“…Heuristic methods were also given credit for optimizing UFLS relay parameters. The genetic algorithm (GA) [11] and simulated annealing (SA) [12] were developed for setting UFLS relay parameters successfully.…”

Um novo esquema para rejeição de cargas baseado em um sistema multiagentes

“…A operação baseada em SMA já possui bastante empregabilidade e é bastante eficiente para a operação de SG (DIMEAS; . São basicamente classificados em duas categorias: SMA Descentralizados e SMA Centralizados (SIGRIST; EGIDO;ROUCO, 2012). Esquemas descentralizados utilizam a alocação de recursos distribuídos para se atingir um determinado objetivo.…”