Abstract
This paper describes transient analysis of the orthogonal- core type dc-ac converter for the photovoltaic power system. The analysis is based on the numerical model of the orthogonal-core for use in SPICE. As one example of the transient analysis, we calculated the voltage and current of the dc-ac converter when its secondary is cut off from the ac system. The calculated results agree well with the measured ones. The analytical method presented here is useful for behavior prediction of the photovoltaic power system for various faults such as ac system interruption and line-to-line fault.
