Open AccessMeasurement‐based voltage stability assessment for load areas addressing n −1 contingencies
Author(s) -
Hu Fengkai,
Sun Kai,
Shi Di,
Wang Zhiwei
Publication year - 2017
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2016.1913
Subject(s) - reliability engineering , stability (learning theory) , voltage , computer science , control theory (sociology) , engineering , electrical engineering , machine learning , artificial intelligence , control (management)
This study proposes an online measurement‐based method for n −1 voltage stability assessment on a load area by means of an equivalent system of N + 1 buses introduced by Hu et al . to represent N boundary buses of the load area and the external system. This method utilises real‐time synchro‐phasor measurements on N boundary buses and online state estimation on the load area to analyse n −1 sensitivities for equivalent transfer admittances and power flows by means of a modified line outage distribution factor in order to estimate the voltage stability margin of power transfer to each boundary bus under an anticipated n −1 condition. The method is demonstrated on the Northeast Power Coordinating Council 48‐machine, 140‐bus power system.