Voltage Stability Control Based on Angular Indexes from Stationary Analysis

Gabriel J. Lopez (), Jorge W. González, Idi A. Isaac, Hugo A. Cardona and Oscar H. Vasco
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Gabriel J. Lopez: Research Group on Transmission and Distribution of Electric Power, Universidad Pontificia Bolivariana, Medellin 050031, Colombia
Jorge W. González: Research Group on Transmission and Distribution of Electric Power, Universidad Pontificia Bolivariana, Medellin 050031, Colombia
Idi A. Isaac: Research Group on Transmission and Distribution of Electric Power, Universidad Pontificia Bolivariana, Medellin 050031, Colombia
Hugo A. Cardona: Research Group on Transmission and Distribution of Electric Power, Universidad Pontificia Bolivariana, Medellin 050031, Colombia
Oscar H. Vasco: Research Group on Transmission and Distribution of Electric Power, Universidad Pontificia Bolivariana, Medellin 050031, Colombia

Energies, 2022, vol. 15, issue 19, 1-18

Abstract: This paper presents a novel methodology for the calculation of angular indexes of an electrical system from stationary analysis, using load flow and nose curves (P–V) in each of the buses of the system to perform control actions and preserve or improve voltage stability. The control actions are proposed considering a novel method based on the concepts of the cutset angle (CA) and center of angle (COA). The target is a fast estimation of voltage-stability margins through an appropriate angular characterization of the whole system and for each load bus with a complete network and N-1 contingency criteria. The most significant enhancement is that the angular characterization is based on the COA, which is related to the angular dynamics of the system, and indirectly reflects the inertia and the respective angles of the generator rotor, as well as the impact on the angular equivalent-system model. Simulations showed that the COA is an important index to determine the location of occurrence of the events. The COA can also help aim where control actions, like the amount of load shedding, should be carried out to remedy the voltage problems. The proposed method is assessed and tested in the benchmark IEEE 39-bus system.

Keywords: cutset angle; center of angle; angular index; load flow; voltage stability; angular characterization; IEEE 39-bus system; PMU; synchrophasor; power-system stability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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