An Approach for Real Time Voltage Stability Margin Control via Reactive Power Reserve Sensitivities

作者：Leonardi Bruno^*; Ajjarapu Venkataramana

来源：IEEE Transactions on Power Systems, 2013, 28(2): 615-625.

DOI：10.1109/TPWRS.2012.2212253

• Emergency control
• reactive power reserves
• reactive power reserve sensitivity
• voltage collapse
• voltage stability control

This study proposes a man-in-loop control method to boost reactive power reserves (RPRs) while maintaining a minimum amount of voltage stability margin (VSM) bus voltage limits. The objective is to determine the most effective control actions in order to reestablish critical RPRs across the system. Initially, the concept of reactive power reserve sensitivity with respect to control actions is introduced. In the sequel, a control approach based on convex quadratic optimization is used to find the minimal amount of control necessary to increase RPRs above their pre-specified (offline) levels. Voltage stability margin constraints are incorporated using a linear approximation of critical RPRs.
Simulation results show that system operators can optimally determine the right amount and location of control actions in order to restore critical RPRs and enhance VSM by using reactive power reserve sensitivities. Moreover, the optimization problem size can be made small if only the most effective control actions are selected, a desirable advantage for real time implementations of man-in-loop control.

• 出版日期2013-5