Transmission Expansion Planning in Deregulated Power ... - tuprints

4 Market Based Criteria 40

is used as plann**in**g criterion, the plan which m**in**imizes the sum of weighted square errors

between mean of LMP of load buses and average LMP of the network is selected as the f**in**al

plan. Therefore, this criterion decreases price discrim**in**ation among load buses and hence

provides a non-discrim**in**atory environment for consumers. This criterion assigns greater

weight to the buses which have greater load. Hence, this criterion tries to provide a nondiscrim**in**atory

environment for more loads. S**in**ce this criterion assigns weight zero to the

buses that do not have load, it does not encourage competition among producers necessarily.

4.2.2.4 Weight**in**g with Sum of Mean of Generation **Power** and Load

The mean of sum of generation power and load at bus i is given by:

with:

Nr

k 1 k k

µ ( P = ( + )

g + P P

)

g P

i

i,

j d for i=1, 2,…, Nb (4.15)

d

i,

j

i N

k

gi

di

P ( P + )

∑

r j=

1

µ mean of sum of generation power and load at bus i after add**in**g plan k **in** MW

If the weighted standard deviation of mean of LMP with the weight:

k k

w i ( Pg

+ P i d

)

i

= µ for i=1, 2,…, Nb (4.16)

is used as plann**in**g criterion, the plan which m**in**imizes the sum of weighted square errors

between mean of LMP of each bus and average LMP of the network is selected as the f**in**al

plan. Therefore, this criterion decreases price discrim**in**ation among all customers and hence

provides a non-discrim**in**atory competitive environment for them. This criterion assigns

greater weight to the buses which have greater sum of load and generation. Hence, this

criterion tries to provide a competitive environment for more loads and generations.

4.2.3 Load Payment

Form the viewpo**in**t of power consumers total payment for buy**in**g power, i.e. total generation

receives plus total congestion cost, is important. Hence, average of total load payment can be

used as a criterion for transmission expansion plann**in**g. Average of total load payment dur**in**g

the peak load of plann**in**g horizon after add**in**g plan k is equal to:

Nr

Nb

k 1

k k

µ = ∑∑Pd

lmp

tlp

i j

i,

j

(4.17)

N

,

r

j=

1 i=

1