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Group-type transformer has poor ability withstand DC bias, which causes transformer local overheating, increases vibration, noise and other adverse reactions. The internal characteristics of group-type transformer DC bias are analyzed in this paper. Pointed out what it is increased with the increase of DC that harmonic of excitation current and frequency. With different DC bias current, the variation...
The real capacity of valve-regulated lead acid battery (VRLA) determines reliability of direct current (DC) power system directly. The 50% rated capacity discharge testing in this paper is based on full capacity discharge method and its final voltage is obtained according to build and analyse mathematical model. Compare to full capacity discharge, this method can settle long time discharge and low...
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