The development of a passive damper-filter has made it possible to achieve a stable capacitive-coupling substation (SCC). This paper presents the underlying theory and analyzes the impact of the SCC on a power network system. The related nuisance phenomena (overvoltage, ferroresonance) are described together with the solutions applied. Test results are presented as proof that the nuisance phenomena have been satisfactorily eliminated: overvoltage is adequately limited at the worst node by protecting the equipment and ferroresonance never lasts more than two cycles. Lastly, the paper describes Hydro-Quebec's first such capacitive-coupling substation installed at Riviere Ste-Anne (Quebec).
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Bolduc et al. (1997) studied this question.
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