# Transmission Expansion Planning in Deregulated Power ... - tuprints Transmission Expansion Planning in Deregulated Power ... - tuprints

4 Market Based Criteria 40

is used as planning criterion, the plan which minimizes the sum of weighted square errors

between mean of LMP of load buses and average LMP of the network is selected as the final

plan. Therefore, this criterion decreases price discrimination among load buses and hence

provides a non-discriminatory environment for consumers. This criterion assigns greater

weight to the buses which have greater load. Hence, this criterion tries to provide a nondiscriminatory

environment for more loads. Since 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 Weighting 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 adding 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 planning criterion, the plan which minimizes the sum of weighted square errors

between mean of LMP of each bus and average LMP of the network is selected as the final

plan. Therefore, this criterion decreases price discrimination among all customers and hence

provides a non-discriminatory 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.

Form the viewpoint of power consumers total payment for buying 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 planning. Average of total load payment during

the peak load of planning horizon after adding 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

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