I changed the subject line to reflect the change in topic. The multiplier used to compute the Hessian term is the shadow price on the corresponding constraint. This multiplier is passed by the solver to the hessian evaluation function. There is an example in t_opf_mips.m at line 472 <https://github.com/MATPOWER/matpower/blob/ed318ef17a28eced350b7bb07fd6f25384f0dcc3/lib/t/t_opf_mips.m#L472>, which calls opf_nle_fcn1() <https://github.com/MATPOWER/matpower/blob/master/lib/t/opf_nle_fcn1.m> and opf_nle_hess1() <https://github.com/MATPOWER/matpower/blob/master/lib/t/opf_nle_hess1.m>.
If you haven’t already, you may also want to have a look at MATPOWER Tech Note 2 "AC Power Flows, Generalized OPF Costs and their Derivatives using Complex Matrix Notation,” <http://www.pserc.cornell.edu/matpower/TN2-OPF-Derivatives.pdf> especially section 7, to see how these multipliers arise in the Lagrangian. Ray > On Feb 1, 2019, at 11:34 AM, Pranami Kuldip <pkn12...@gmail.com> wrote: > > Dear sir, > > Here in given example of non-linear additional constraints, 'lambda' was > taken for constructing a hessian matrix. > > So, To add nonlinear inequality constraint, what is multiplier to construct > hessian matrix? > > Is it 'lambda' or 'mu' or something else? > > On Fri, 1 Feb 2019, 9:14 pm Ray Zimmerman <r...@cornell.edu > <mailto:r...@cornell.edu> wrote: > There is an example of adding constraints by direct specification in the OPF > test files, for example see t_opf_default.m starting at line 229 > <https://github.com/MATPOWER/matpower/blob/7841457957251b3135bd3a534bbc171ae672957a/lib/t/t_opf_default.m#L229>. > > Ray > > >> On Jan 30, 2019, at 2:55 PM, Meraj Fouad <meraj...@gmail.com >> <mailto:meraj...@gmail.com>> wrote: >> >> Hello Dear >> >> I also want to add some constraints related with renewable energy in the >> master OPF problem. Help needed in this regards. >> >> Best regards >> Fouad Hasan >> >> On Tue, Jan 29, 2019 at 4:20 AM Pranami Kuldip <pkn12...@gmail.com >> <mailto:pkn12...@gmail.com>> wrote: >> Dear Sir, >> >> I had gone through this MATPOWER 7.0b1. section 6.3.2 and chapter 7. >> >> Is there any example of adding constraints using direct specification? >> because I cannot set with callback functions. >> I want to add a non-linear constraint using Direct Specification. >> If it is possible to help me with a small example then it is very helpful. >> >> thank you. >> >> On Fri, Jan 18, 2019 at 1:50 AM Ray Zimmerman <r...@cornell.edu >> <mailto:r...@cornell.edu>> wrote: >> No. Check out the “System Requirements” section of the User’s Manual >> <http://www.pserc.cornell.edu/matpower/docs/MATPOWER-manual-7.0b1.pdf> or >> the README <https://github.com/MATPOWER/matpower/>. >> >> MATLAB R2006b or later should be just fine, though very old versions are not >> extensively tested. >> >> Ray >> >> >>> On Jan 16, 2019, at 9:26 PM, Pranami Kuldip <pkn12...@gmail.com >>> <mailto:pkn12...@gmail.com>> wrote: >>> >>> Is it necessary to install MATLAB 2018 for MATPOWER 7.0b1? >>> >>> On Fri, 11 Jan 2019, 7:51 am Ray Zimmerman, <r...@cornell.edu >>> <mailto:r...@cornell.edu>> wrote: >>> Have a look at the section on User-defined Constraints in section 6.3.2 and >>> Chapter 7 of the User’s Manual for MATPOWER 7.0b1 >>> <http://www.pserc.cornell.edu/matpower/docs/MATPOWER-manual-7.0b1.pdf>. >>> >>> Ray >>> >>> >>>> On Jan 7, 2019, at 5:46 AM, Pranami Kuldip <pkn12...@gmail.com >>>> <mailto:pkn12...@gmail.com>> wrote: >>>> >>>> Hello sir, >>>> >>>> currently, I am working on optimal power flow with additional voltage >>>> stability constraint. >>>> so for this, I have a function for calculating voltage stability index. >>>> >>>> Now, is it possible to add this extra variable to OPF as a constraint? >>>> please guide me for how can I start my work with manpower. >>>> >>>> thank you. >>> >> >
