SYSTEMS AND METHODS FOR GLOBAL VOLTAGE SECURITY ASSESSMENT IN POWER SYSTEMS

摘要

Systems and methods for global voltage security assessment in power systems are disclosed herein. In one embodiment, a method for assessing voltage security in a power system having a number (i) of buses includes capturing a change in bus voltage and a change in line reactive power for at least some of the buses in the power system, for each of the i number of buses, calculating a voltage assessment index) (Γ_i) for as follows:; $$ {\Gamma }_i=\sum _j\frac{\Delta Q_{\mathrm{ij}}}{\Delta V_i}$$ ;where ΔV_i is the change in bus voltage and ΔQ_ij is the change in line reactive power from a connection j over a predetermined period of time. The method further includes assessing a current voltage security status of the power system based on the calculated voltage assessment index (Γ_i).