500kV electrical resistors at Doc Soi 500kV substation
The expansion of Doc Soi 500kV substation is built on an area of more than 9 hectares in Binh Nguyen commune, Binh Son district, Quang Ngai province.
The subproject includes: reforming 500kV side diagram from the existing quadrilateral diagram to 3/2 diagram; expanding 8 more feeders (2 feeders to the Quang Trach 500kV distribution switchyard, 2 feeders to Pleiku 2 500kV substation, and land reserve for 4 feeders); installing 2 sets of horizontal compensation resistors (500kV – 192MVAr) and 2 sets of vertical compensation capacitors (500kV – 43Ω – 2000A) for Quang Trach - Doc Soi 500kV transmission line (2 circuits); installing 2 sets of horizontal compensation resistors (500kV – 65MVAr), 2 sets of vertical compensation capacitors (500kV - 30.5Ω – 2000A) for Doc Soi – Pleiku 2 transmission line (2 circuits).
The subproject also includes the installation of an optical amplifier; adding optical interface modules to the existing optical transmission equipment; equipping protective relays with remote cut-off devices.
The completion of energizing of the Doc Soi 500kV substation expansion subproject is of very important significance, preparing for energizing and putting into operation Doc Soi - Pleiku 2 500kV transmission line (expected at the end of March 2021).