Influence of Filter Reactance on Input and Output Characteristics of DC De-Icer

Direct current (DC) de-icer has been widely used in China since the 2008 ice disaster. In the existing analysis and calculation of the characteristics for DC de-icer, the influence of filter reactance is generally neglected to simplify, thus the results are greatly deviated from actual situation. In this paper, the input and output characteristics of DC de-icer are well studied considering the influence of the filter reactance. The equivalent circuit model of DC-side and alternating current (AC) side fundamental frequency equivalent models in DC deicer is established, and the filter reactance size and ice melting device are obtained. The quantitative relationship between the filter reactance and the key parameters of the DC de-icer is obtained, which provides a basis for the characteristic analysis of the ice melting system and the fine design of the device parameters.