Model for calculating shell leakage current of ultra-high and extra-high voltage direct-current filter capacitor

The invention discloses an ultra/extra-high voltage direct current filter capacitor shell leakage current calculation model, which comprises a node model, a step model and a uniform distribution model, the node model takes each element series section as a node, each node has a leakage current, and a capacitor shell in the node model is an equipotential body and is equipotential with a frame; the node potentials in the node model are different, the shell leakage current is different, the shell connection part is the last series connection section, and according to the basic assumption of the model, the shell leakage current of the high-voltage end of the last series connection section is I0, and the shell leakage current of the first series connection section of the high-voltage end is nI0. According to the method, the leakage current is calculated through the node model, the uniform distribution model and the step model, so that the operation safety of the direct-current capacitor is ensured. 本发明公开了超、特高压直流滤波电