Transmission Expansion Planning in Deregulated Power ... - tuprints

4 Market Based Criteria 47
σ
σ
σ
σ
k
µ lmp
k
µ lmp , w= Pg
k
µ lmp
, w= Pd
k
µ lmp , w d
= Pg+
P
Existing
Network
Plan 1
(line: 1-4)
Plan 2
(line: 2-4)
Plan 3
(line: 5-4)
Plan 4
(line: 2-3)
Plan 5
(line: 5-3)
Selected Plan
(line: ? - ?)
4.9381 2.8802 5.0796 2.4649 4.8475 3.5199 3 (5 – 4)
2.0248 1.4028 2.1103 0.9712 2.0426 1.2166 3 (5 – 4)
1.7953 1.0926 1.7824 0.9406 1.7105 1.4536 3 (5 – 4)
2.7061 1.7781 2.7623 1.3521 2.6642 1.8955 3 (5 – 4)
k µ
tcc
4510 4524 4384 3677 4505 3509 5 (5 – 3)
k µ
tlp
32280 31846 31766 31729 32604 31741 3 (5 – 4)
k
** Dimension of σ is $/MWhr, and Dimension of
µ ,
lmp w
k µ and
tcc
k µ is $/hr.
tlp
hence from the viewpoint of this criterion plan 3 is selected as the final plan. Now the
following questions arise:
• Which criterion does provide the best environment for competition? On the other word,
less congestion cost leads to more competitive environment or smaller weighted
standard deviation of mean of LMP?
• Table 4.1 shows that after installing plan 3 or 5 there is considerable congestion cost
and LMP difference. Therefore, to have a perfect competitive market other lines must
be added to the network. The question is which criterion leads to a perfect competitive
market at minimum cost or at minimum number of expansion plans.
k k
k
k
• In this example σ , σ , σ , σ , and
µ lmp µ lmp , w= Pg
µ , = P µ lmp , w= Pg+
Pd
lmp
w d
to the same result. Do they lead to the same result always?
k µ lead
tlp
Although the above questions do not have absolute answers and their answers depend on
the network structure, we try to make their answers more clear with an example after
presenting an approach for transmission expansion planning in the next chapter.