\[VSF_a=(\sum_(^{ }t=1)^(N_t)\sum_(^{ }i=2)^(N_b)VSF_(i+1)^t)\]
\[/(N_t(N_b-1))\left(20\right)\]
Nb is the sum of the number of buses in the network. The bus -i + 1 is assumed to be in the main distribution post. The researchers looked at how high the VSF was. The network is more stable. If the line capacity increases from the existing transmission capacity, it will be overloaded, which is likely to cause network congestion, which in turn will cause various types of network disruptions. Line load (LL) is the load distribution (MVA) on the line according to the maximum power capacity (MVA) that is expressed for line i during the time interval "t" as follows: