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A new idea of using DC-DC modulation AC/AC technique instead of a transformer to link Dynamic Voltage Restorer (DVR) to the transmission line is proposed in this paper. Dynamic voltage restorer is used as series compensation to mitigate voltage disturbances. This paper presents a transformerless DVR that can mitigate long duration voltage sags and swells with lower losses and a flexible AC/AC conversion...
The cascaded H-Bridge Dynamic Voltage Restorer (DVR) is embedded into the grid in series for suppressing voltage sags. The function of the LC filter in the DVR is to eliminate the switching ripples, and an accurate tracking feature in a certain frequency range is required in the LC filter. The parameter selection of the LC filter is a key factor which decides the cost and volume of the DVR. In the...
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