Based on Sinclair Knight Merz (SKM)’s more that 15 years of transmission asset valuations and detailed understanding of factors affecting the economic life of transmission assets in a number of countries worldwide, they have estimated the typical economic life span of major high voltage electrical equipment to fall within the following range*;
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The first High Voltage DC (HVDC) system that came into full commercial operation was installed by Swedish State Power Board (now Vattenfall)
Anyone might ask why the typhoon “Milenyo” that hit the southern part of Luzon and Metro Manila on Sep. 28, 2006 can cause a Luzon wide blackout since only a portion of the island was ruined by the typhoon.
Below are the links of the two types of IEEE test systems for power system analysis.