Optimal Power Systems Restoration Based on Energy Quality and Stability Criteria

Francisco Quinteros, Diego Carrión and Manuel Jaramillo
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Francisco Quinteros: Smart Electric Grids Research Group GIREI (Spanish Acronym), Salesian Polytechnic University, Quito 170702, Ecuador
Diego Carrión: Smart Electric Grids Research Group GIREI (Spanish Acronym), Salesian Polytechnic University, Quito 170702, Ecuador
Manuel Jaramillo: Smart Electric Grids Research Group GIREI (Spanish Acronym), Salesian Polytechnic University, Quito 170702, Ecuador

Energies, 2022, vol. 15, issue 6, 1-23

Abstract: Electric power systems (EPS) are exposed to disconnections of their elements, such as transmission lines and generation units, due to meteorological factors or electrical failures. Thus, this research proposes a smart methodology for the re-entry of elements that have been disconnected from the EPS due to unforeseen events. This methodology is based on optimal AC power flows (OPF-AC) which allow verifying the state of variables such as voltage, angular deviation, and power (these variables are monitored in normal and fault conditions). The proposed study considers contingencies N-2, N-3, N-4, and N-5, for which the disconnection of transmission lines and generation units are carried out randomly. The analysis of the EPS after the disconnections of the elements is carried out by means of the contingency index, with which the impact that the disconnections of the elements have on the EPS is verified. In this way, the optimal route is generated to restore the elements that went out of operation, verifying that when the elements re-enter the acceptable limits, voltage and voltage angle are not exceeded. According to the results of the methodology used, it was found that NM contingencies can be applied in the proposed model, in addition to considering stability restrictions, modeled as restrictions on acceptable voltage limits, and a new restriction for the voltage angle between the differences of the bars.

Keywords: contingency analysis; optimal power flows; power system planning; power system restoration; 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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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