Generation Capacity Expansion Planning in Deregulated Electricity ...

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Generation Capacity Expansion Planning in Deregulated Electricity ...

4.2.5 Constraints

4.2.5.1 Generation constraint on pre-installed plants in the system

Since there are three existing generating units in the system, these units will continue to operate

within their operating constraints which are basically their respective maximum and minimum limits

on generation, which are expressed as follows:

() ( ) () Max

Min

i ≥ EP i,

b,

k EP i

EP ≥

EP(i) Max Upper limit on pre-installed generation units at bus i

EP(i) Min Lower limit on pre-installed generation units at bus i.

4.2.5.2 Generation constraint on new Plants coming in to the system

The new generating units installed at specific buses in different years will be constrained in their

dispatch by different factors such as maximum capacity factors of respective technologies and

maximum available capacity at a bus in a year of such technology. All these constraints are modeled

as follows:


b

Pg

( i b,

k,

m)

∗ Dr(

b)

≤ Tc(

i,

k,

m)

( m)

8760

, ∗cf


( i,

b,

k,

m)

≤ Tc(

i,

k m)

Pg ,

cf(m) Capacity factor of the plants based on m technology

Tc(I,k,m) Available capacity at bus i in year k, of technology m

4.2.5.3 Emission constraint

To impose a cap on total annual emissions by different generation plants so as to ensure

environmentally friendly investment plans, a pre-specified maximum annual emission limit is

considered, that is modeled as (33) and (34).

50

(30)

(31)

(32)

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