The exercise will be held from 3h to 7h on September 17, 2017 at the Power Load Dispatch Department of Da Nang Power Company Limited – Da Nang PC; at 110 / 22 kV substations and 22 kV medium voltage feeders according to exercise situations; at 22 / 0.4 kV substations to supply electricity to venues where host important APEC events and at locations of possible failure occurrence in each situation.
According to Da Nang PC, during the exercise, power outages will occur in some areas of Da Nang city and the surrounding areas.
Da Nang PC is responsible for giving advance notice to electricity consumers about the power outages when conducting the drill.
On August 31, 2017, Da Nang PC coordinated with PTC2 to convert and temporarily operate the Da Nang - Ngu Hanh Son 220 kV transmission line at 110 kV voltage level in order to enhance the electricity delivery to Lien Tri, Hoa Xuan, Quan Ba, An Don 110 kV Substations in service of the upcoming APEC 2017 Conference.
Da Nang PC has conducted surveys and calculations for connection options of Da Nang - Ngu Hanh Son 220 kV transmission line. After Power Engineering Consulting Company No.4 (the designer of the transmission line) confirmed that the mechanical structure of supporting towers can withstand forces when stretching out power lines to change to the voltage level 110 kV, Da Nang PC has developed a technical construction plan and cost estimation for converting the transmission line connection.
Based on the approved plan, Da Nang PC disassembled and recovered a section of conductor ACSR 500 mm2 phase A from position H29 to H30 of the 271 NHS line, keeping unchanged phase B and phase C, extending three new conductor sections, jumpers and connection fittings. The works commenced from 05h00 on August 31, 2017 and until 16h00 on the same day the conversion of the transmission line to 110 kV voltage level was completed and accepted.
Da Nang PC said that with this conversion into operation at 110 kV level, 110 kV substations in service of the coming APEC in the coming time will be supplied with electricity from two different sources, properly allocating transmission capacity on transmission lines, securing a safe, stable and reliable system operation during the APEC 2017 Conference.