Voltage instability prediction based on reactive power reserve of generating units and zone selection

Assessment of effective reactive power reserve in power system networks under uncertainty applying coronavirus herd immunity optimizer (CHIO) for operation simulation

“…Most of the literature evaluated RPR in the context of operational constraints enforcement such as: statutory voltage limits [ 12 , 13 ], and voltage stability [ 14 , 15 ] etc. The effectiveness of RPR to support system voltage for the remote critical operating area is limited [16] . Hence, some researchers have introduced the concept of Effective Reactive Reserve (ERR), which is an effective share of RPR and contributes significantly in maintaining system voltage under strained conditions [16] , [17] , [18] .…”

“…The effectiveness of RPR to support system voltage for the remote critical operating area is limited [16] . Hence, some researchers have introduced the concept of Effective Reactive Reserve (ERR), which is an effective share of RPR and contributes significantly in maintaining system voltage under strained conditions [16] , [17] , [18] . Approaches such as the zonal contingency approach [16] , linear sensitivity approach [17] , or load sensitivity approach [18] are some established mechanisms to evaluate ERR.…”

“…Hence, some researchers have introduced the concept of Effective Reactive Reserve (ERR), which is an effective share of RPR and contributes significantly in maintaining system voltage under strained conditions [16] , [17] , [18] . Approaches such as the zonal contingency approach [16] , linear sensitivity approach [17] , or load sensitivity approach [18] are some established mechanisms to evaluate ERR. The assessment of the ERR is quite difficult, as it is sensitive to the system's operational state [19] .…”

Hybrid voltage stability and security assessment using synchrophasors with consideration of generator Q‐limits

“…Recent work focused on a possible extension of measurement‐based stability analysis techniques to consider the impact of reactive power limits [21] using the concept of CPF predictor, but this approach does not consider architecture for real‐time analysis. A correction factor is introduced in [22] to predict the impact of Q ‐limits on Thevenin‐based voltage stability index (VSI), but this work does not consider the mathematical formulation to estimate the impact of Q ‐limits. Impact of Q ‐limits on security analysis is not considered in [21, 22].…”

“…A correction factor is introduced in [22] to predict the impact of Q ‐limits on Thevenin‐based voltage stability index (VSI), but this work does not consider the mathematical formulation to estimate the impact of Q ‐limits. Impact of Q ‐limits on security analysis is not considered in [21, 22]. Impact of Q ‐limits on the coupled single port‐based approach is presented in [23].…”