A Novel Methodology for Strengthening Stability in Electrical Power Systems by Considering Fast Voltage Stability Index under N − 1 Scenarios

An electrical power system (EPS) is subject to unexpected events that might cause the outage of elements such as transformers, generators, and transmission lines. For this reason, EPS should be able withstand failure one these without changing its operational characteristics; operativity functionality called N−1 contingency. This paper proposes a methodology for optimal location sizing parallel static Var compensator (SVC) in an reestablish stability conditions before contingencies take place. The system’s analyzed using fast voltage index (FVSI) criterion, SVC determined by also considering lowest possible cost. research considers involving disconnection Then, analyzes every scenario which line disconnected. them, algorithm finds weakest comparing FVSI values (the higher FVSI, closer instability); afterward, when selected, brute force, with 5 Mvar 100 Mvars steps applied sending bus bar line. value capable reestablishing each line’s pre-contingency while bus-bar’s profile having cost selected solution. proposed was tested on IEEE 14, 30, 118 bars case studies contingency prior outage, indicates performs 100% accuracy. Additionally, profiles were reestablished their values, some cases, they even than original values. Finally, results achieved single solution unique located under all scenarios.