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Switching study conducted to support the operation plan of 275 kV transmission line between Padang Sidempuan 275 kV Substation to Payakumbuh 275 kV Substation at the end of 2012. This transmission line will be the system backbone for North System and Middle-South system interconnection. When the interconnection is done, the operation flexibility in Sumatera will be better, in terms of plant load planning...
High Voltage / Extra High Voltage (HV/EHV) performance calculation of lightning stroke used to use thunder days method. With the technology improvement where it can be known the ground flash density, the Lightning Performance of HV/EHV transmission lines can be accurately done by using the ground flash density in the region that are passed by the transmission lines.
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