Li Da

TL;DR: In this paper, an insulation coordination method and system for a symmetric bipolar flexible direct current engineering converter station is described. But the method is characterized by comprising the step of preparing a plurality of lightning arresters, comprising a lightning arrester for connecting a transformer valve side, a bridge arm electric reactor valve side lightning ARrester, lightning arrester among bridge arm electrical reactor terminals, a direct current pole bus lightning ARREster, direct current line lightning ARRSE, a grounding electrode line lightning arreester, a metallic returnlightning arresters, a first

TL;DR: In this article, an evaluation method and system for alternating current filter loss is presented, which comprises the following steps that: according to preset basic parameters used for an alternating currents filter, obtaining the fundamental frequency current of an alternating Current Filter zero ohm resistor; through the fundamental current and the basic parameters of the alternating currents used for the alternating current filters, determining the critical frequency loss of the filter; according to the amount of convertor stations and the number of alternating currents, evaluating the filter loss.

TL;DR: In this article, a main electric wiring system for polar lines of bipolar flexible DC power grids and an online overhauling method is described. But the main electric wires are not connected to the power transmission line on the AC side.

TL;DR: In this article, a bipolar flexible direct current network neutral line transfer switch configuration system and a conversion method, comprising a positive neutral line circuit, a neutral busswitch is arranged in the positive neutral circuit of the fast neutral ground switch and a neutral bus switch is placed in the negative neutral circuit.