Ferroresonance mitigation for the unconventional rural electrification system

This paper presents a solution to the observed ferroresonance (FRR) phenomenon for both energization switching and load shedding conditions in an unconventional rural electrification system. The energy is extracted from the electric field surrounding an extrahigh voltage transmission line. Ferroreso...

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Bibliographic Details
Published inElectric power systems research Vol. 223; p. 109590
Main Authors Rojas, R.E., Chaves, J.S., Tavares, M.C.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2023
Subjects
Capacitive coupling
Colector line
Ferroresonance
Shunt resistor
Tuning reactor
Ferroresonance
Capacitive coupling
Tuning reactor
Shunt resistor
Colector line
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Summary:This paper presents a solution to the observed ferroresonance (FRR) phenomenon for both energization switching and load shedding conditions in an unconventional rural electrification system. The energy is extracted from the electric field surrounding an extrahigh voltage transmission line. Ferroresonance occurs in the power transformers of the distribution substation, and the existing solution cannot be directly applied. The mitigation method consists of the insertion of a shunt resistor when the FRR starts. The robustness of the method is shown in a time-domain simulation implemented in PSCAD/EMTDC. •The ferroresonance is present in an unconventional electrification system.•Normal operating conditions are directly dependent on the load.•The system has a more critical response to load shedding cases.•Shunt resistors are used as a satisfactory mitigation method.•The values of the resistors depend directly on the load currently connected.
ISSN:0378-7796
1873-2046
DOI:10.1016/j.epsr.2023.109590