Analysis and Improvement of Ground Protection Problems of Internal Secondary Distribution System in Qinshan CANDU Plant
During the operation of Qinshan CANDU Nuclear Power Plant,internal secondary distribution system encoun-tered override trip of power control center(PCC)ground protection,resulting in reduced reliability of the distribution sys-tem and the process system.On the basis of case analysis,combined with domestic design standards and peer experience,this paper gives solutions from the perspective of for the tuning of ground protection,and puts forward rational sugges-tions for the posterior type selection of unit equipment.
internal secondary distribution systempower control centermotor control centerground protection