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In this paper study on solid-state medium-frequency transformer isolated substation is modeled in detail. The substation is formed by AC/DC rectifier, six-pulse DC/AC inverter, high-frequency transformer, DC/AC six-diode rectifier and DC/AC inverter. Both AC/DC rectifier at high AC grid-1 side and DC/AC inverter at lower grid-2 side are controlled by proportional resonant controller and are interfaced...
The fault characteristic of inverter interfaced DG is very different from that of synchronous rotating generators. Traditional protection methods based on large fault current are no longer applicable to inverter-only supplied microgrid. This paper analyzes the fault behaviour of inverter based microgrid, and proposes an adaptive fault current protection algorithm for this type of microgrid. According...
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