Dear all,
I would like to ask something more about LMPs. Is there any function
like DCOPF that incorporates the impact of losses in
the calculation of LMPs, like the models (that are now applied in PJM,
NYISO etc.) which explicitly balance the losses in the energy balance
equation?
Thank for
Dear Jovan and Sarmad,
I agree with your comments about LMP. In this analysis I’m not considered the
congestion. If the generation inequality constraints aren’t active, Matpower
prints this information correctly, and It’s possible to realize different
prices when the lines is congested. Sarmad,
The LMPs for a DC OPF problem do incorporate any generator limits as well as
generation cost. Consider the case with no congestion, where the LMPs are
uniform at all nodes. For nodes with generators that are dispatched between
their lower and upper limits, the LMP equals their marginal cost of g
I think your question is whether MATPOWER includes a solver for a DCOPF with
losses. The answer is that currently it does not.
Ray
> On Nov 19, 2015, at 4:55 AM, Kanis Kanis wrote:
>
> Dear all,
>
> I would like to ask something more about LMPs. Is there any function like
> DCOPF that in
Thank you so much for the information Prof. Zimmerman.
I’d like your explanation about the simulation for the 6-bus system (Wood &
Wollemberg). When I run a DCOPF with the original case (rundcopf(case6ww)), the
LMP shown for Matpower are the same (11.899 $/MWh) for all buses because there
isn’t
Dear Victor:
Derivation of the lagrangian function with respect to Pg1 yields
the first order optimality condition
f'(Pg1) + mu_+ - mu_- - \lambda_P1 = 0
or \lambda_P1 = f'(Pg1) + mu_+ - mu_-
where \lambda_P1 is the multiplier
Dear Vh,
Regarding your question: why LMP doesn’t include the Lagrange multipliers
related to generation inequality constraints
The answer is it does!! As Carlos explained:
f'(Pg1) + mu_+ - mu_-- \lambda_P1 = 0
or \lambda_P1 = f'(Pg1) + mu_+ - mu_-
Your dual problem should also state the
Dear Fellow Member,
I ran load flow analysis on a IEEE-14 bus system using MATPOWER, PSAT and
PowerWorld. Voltage magnitudes as well as phases have slightly different
values in all three tools. However, the difference is not much but I want
to know what causes difference among results obtained wit
If the system parameters are the same, it could be because the tolerance
levels that were set for the different software were different i.e. the
default power balance mismatch tolerances are not always the same in all
software. Also probably if the VAR limits are active for PV buses,
different soft
