System Constraints part 3
Running spare capacity constraints
To ensure the existence of enough spinning reserve to
overcome any emergency situation
The generation should guarantee a minimum spare capacity
in addition to load demand and power losses
Pg > PLoad + Ploss
This difference, i.e. spare capacity, is defined according to
economic issues and technical aspects like the ramping rates
of the generators
The transmitted power is limited as follows
PT.L ≤ PT.L,max
Where PT.L,max is the maximum loading capacity of the transmission line System
Inequality Constraints
Running spare capacity constraints
To ensure the existence of enough spinning reserve to
overcome any emergency situation
The generation should guarantee a minimum spare capacity
in addition to load demand and power losses
Pg > PLoad + Ploss
This difference, i.e. spare capacity, is defined according to
economic issues and technical aspects like the ramping rates
of the generators
Transmission line constraints
There is a thermal capability of each transmission line that defines the allowed flow of
active and reactive power
The transmitted power is limited as follows
PT.L ≤ PT.L,max
Where PT.L,max is the maximum loading capacity of the transmission line System
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