For finding the LMPs of remaining load buses, you require utility function of the load buses. values of some utility functions are given in the following paper. H Liu et al., "Social welfare maximization in transmission enhancement considering network congestion", IEEE trans. on power systems, vol. 23, no. 3, August 2008, pp. 1105-1114. Please refer table no. VII on page no. 1113.
________________________________ From: Khirad Dhabhar <[email protected]> To: MATPOWER discussion forum <[email protected]> Sent: Monday, 4 March 2013 4:05 PM Subject: Re: performing lmp calculation Mr Karthik. Let me take the 30 bus case as an example. Thus their are 6 gen and hence 6 cost functions.Thus when i take the partial differential i will get six equations. Thus the LMP values of the generator bus. I want the LMP values of all the 30 buses. How do we get that. Thanks khirad On 2 March 2013 11:24, Kartik Pandya <[email protected]> wrote: If your problem size is small then you should get same opf results with ABC method and MINOS (MATPOWER) solver. but for large scale problem, >to get LMP with ABC, first run opf with ABC to get Pg of all generators. then >get first order partial derivatives of the quadratic cost functions of all >generators with respect to pg. then in the obtained equations substitute >Optimal values of pg to obtain LMPs. >--- > > > >________________________________ > From: Ray Zimmerman <[email protected]> >To: MATPOWER discussion forum <[email protected]> >Sent: Thursday, 28 February 2013 9:14 PM >Subject: Re: performing lmp calculation > > > >If your OPF solution matches MATPOWER's OPF solution, then you can simply use >the LMP values computed by MATPOWER's OPF, found in results.bus(:, LAM_P). If >your solution does not match, then I'm afraid it's up to you to demonstrate >that it is even a solution to the OPF problem, i.e. that the optimality >conditions are satisfied. Not sure how MATPOWER can help you here. > > >-- >Ray Zimmerman >Senior Research Associate >419A Warren Hall, Cornell University, Ithaca, NY 14853 >phone: (607) 255-9645 > > > > >On Feb 28, 2013, at 4:00 AM, Khirad Dhabhar <[email protected]> wrote: > >Hi guys. I am doing my mtech project. Now i have been able to successfully >create an ABC(artificial bee colony) based algorithm to solve the optimal >power flow. Now i require the LMP (lambda values) for my solution. How can i >use mathpower to use my opf results to calculate the LMP values. >> >>Thank you >> >>khirad >> >> >>-- >>Friendship is like a red rose with a green stem >> > > > -- Friendship is like a red rose with a green stem
