Equivalent disturbing current limit for HVDC project in new period

On the basis of summarizing bygone research results, standard and design specification related to the influence of HVDC lines on communication networks, systematically investigate the current technical level of immunity capability of communication networks and lines in China and present situation of related standards being executed and by means of theoretical calculation, probability analysis and simulation tests, the interference restriction level that the communication networks can withstand is proposed and the limit of DC equivalent disturbing current (EDC) suitable to immunity level of current communication networks is given.