Abstract
Generalized injection shift factors (ISFs) are the sensitivities of active-power line flows to active-power bus injections. They are computed without designating an artifactual slack bus in the power network; therefore, conceptually, they reflect sensitivities of power flows more accurately than conventional ISFs, the values of which depend on the choice of the slack bus. This paper derives analytical closed-form expressions for generalized ISFs from a perturbative analysis of the ac circuit equations. In addition, they are computed from a system of linear equations that arise from high-frequency synchronized measurements collected from phasor measurement units. As an application, generalized ISFs are used to predict active-power line flows during the transient period following a contingency by leveraging inertial and governor power flows over appropriate time horizons.
Original language | English (US) |
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Article number | 7420704 |
Pages (from-to) | 2071-2080 |
Number of pages | 10 |
Journal | IEEE Transactions on Smart Grid |
Volume | 8 |
Issue number | 5 |
DOIs | |
State | Published - Sep 2017 |
Keywords
- Distribution factor
- injection shift factor
- monitoring
- phasor measurement units
- sensitivity
ASJC Scopus subject areas
- Computer Science(all)