One possible method to connect SVC is, connect it as a generator with no
active power but reactive power injector to controls voltage of a node.
Regards
Mirish
On Fri, Jul 15, 2016 at 10:24 AM, anshu dahiya <dahiyaansh...@gmail.com>
wrote:
> sir say something about my question that was how to connect SVC in the ckt?
>
>
> On Thu, Jul 14, 2016 at 12:55 PM, anshu dahiya <dahiyaansh...@gmail.com>
> wrote:
>
>> sir, how to connect SVC in the ckt with the matpower?
>>
>>
>> On Wed, Jul 13, 2016 at 10:27 AM, anshu dahiya <dahiyaansh...@gmail.com>
>> wrote:
>>
>>> sir how connect voltage regulator in matpower. is it connected in branch
>>> data or in generator data?
>>>
>>> On Fri, Jul 1, 2016 at 10:12 PM, Ray Zimmerman <r...@cornell.edu> wrote:
>>>
>>>> mpopt = mpoption('linprog.Algorithm', 'dual-simplex');
>>>>
>>>> Btw, please confirm all of the things I requested before asking any
>>>> more questions about this topic.
>>>>
>>>> Ray
>>>>
>>>>
>>>> On Jul 1, 2016, at 2:53 AM, anshu dahiya <dahiyaansh...@gmail.com>
>>>> wrote:
>>>>
>>>> sir i have tried very much to change solver but i couldn't understand
>>>> how to change solver in matpower.
>>>>
>>>>
>>>> On Thu, Jun 30, 2016 at 9:50 PM, Ray Zimmerman <r...@cornell.edu>
>>>> wrote:
>>>>
>>>>> So can you confirm each of the follow?
>>>>> - You say that the AC OPF converges but the DC OPF claims
>>>>> infeasibility, correct?
>>>>> - You’ve checked the system data … case_info() output looks good (no
>>>>> islands, 1 reference bus, generation range adequate to serve total load,
>>>>> etc.).
>>>>> - Removing line limits (by setting RATE_A to 0) does not make that
>>>>> problem feasible?
>>>>> - You are using the Optimization Toolbox default solver (linprog or
>>>>> quadprog with interior point solver).
>>>>>
>>>>> If so, can you try with a simplex solver (dual simplex is probably
>>>>> best) and see if that gives a different result?
>>>>>
>>>>> Ray
>>>>>
>>>>>
>>>>> On Jun 30, 2016, at 1:31 AM, anshu dahiya <dahiyaansh...@gmail.com>
>>>>> wrote:
>>>>>
>>>>> sir i have already relaxed my line limits. but it doesn't give any
>>>>> response!
>>>>>
>>>>>
>>>>> On Wed, Jun 29, 2016 at 6:29 PM, Ray Zimmerman <r...@cornell.edu>
>>>>> wrote:
>>>>>
>>>>>> It appears that your solver thinks the problem is infeasible. Try
>>>>>> relaxing the branch flow limits to see if it solves. e.g.
>>>>>>
>>>>>> define_constants;
>>>>>> mpc = loadcase(<your case file>);
>>>>>> mpc.branch(:, RATE_A) = mpc.branch(:, RATE_A) * 2; % double the flow
>>>>>> limits
>>>>>> r = rundcopf(mpc);
>>>>>>
>>>>>> Or instead of doubling the limits, you could temporarily eliminate
>>>>>> them completely.
>>>>>>
>>>>>> mpc.branch(:, RATE_A) = 0; % eliminates line flow limits completely
>>>>>>
>>>>>>
>>>>>> Ray
>>>>>>
>>>>>>
>>>>>> On Jun 29, 2016, at 5:19 AM, anshu dahiya <dahiyaansh...@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>> sir my acopf is running but not the dcopf what may be cause? The
>>>>>> error comes in the matpower is as below:
>>>>>> rundcopf(n84)
>>>>>>
>>>>>> MATPOWER Version 5.1, 20-Mar-2015 -- DC Optimal Power Flow
>>>>>> The interior-point algorithm uses a built-in starting point;
>>>>>> ignoring user-supplied X0.
>>>>>> Exiting: One or more of the residuals, duality gap, or total relative
>>>>>> error
>>>>>> has grown 100000 times greater than its minimum value so far:
>>>>>> the primal appears to be infeasible (and the dual unbounded).
>>>>>> (The dual residual < TolFun=1.00e-08.)
>>>>>>
>>>>>> >>>>> Did NOT converge (0.06 seconds) <<<<<
>>>>>>
>>>>>> On Mon, Jun 27, 2016 at 5:44 PM, Saranya A <asar...@gmail.com> wrote:
>>>>>>
>>>>>>> Hi Anshu,
>>>>>>>
>>>>>>> Even I faced a similar problem with a different system. In
>>>>>>> "mpc.branch" the 6th, 7th and 8th columns represent RATE A - MVA
>>>>>>> rating A
>>>>>>> (long term rating) ,RATE B - MVA rating B (short term rating), RATE C -
>>>>>>> MVA
>>>>>>> rating C (emergency rating) respectively. Try giving a high MVA rating
>>>>>>> to
>>>>>>> all the 3 columns and check if your solution converges.
>>>>>>>
>>>>>>> Regards,
>>>>>>> Saranya.A
>>>>>>>
>>>>>>> On Mon, Jun 27, 2016 at 1:08 PM, anshu dahiya <
>>>>>>> dahiyaansh...@gmail.com> wrote:
>>>>>>>
>>>>>>>> i have double check my data it is giving the below error:
>>>>>>>> *runopf(c84)*
>>>>>>>>
>>>>>>>> *MATPOWER Version 5.1, 20-Mar-2015 -- AC Optimal Power Flow*
>>>>>>>> *MATLAB Interior Point Solver -- MIPS, Version 1.2, 20-Mar-2015*
>>>>>>>> * (using built-in linear solver)*
>>>>>>>> *Numerically Failed*
>>>>>>>>
>>>>>>>> *Did not converge in 6 iterations.*
>>>>>>>>
>>>>>>>> *>>>>> Did NOT converge (0.09 seconds) <<<<<*
>>>>>>>>
>>>>>>>>
>>>>>>>> On Mon, Jun 27, 2016 at 11:51 AM, Fiaz Ahmad <
>>>>>>>> fiazah...@sabanciuniv.edu> wrote:
>>>>>>>>
>>>>>>>>> If there is no syntax error then check your branch matrix. It has
>>>>>>>>> high R and X values,it will not converge. Probably you are not using
>>>>>>>>> the
>>>>>>>>> correct per unit values. Your zbase=vbase*vbase/mvabase. Use zbase to
>>>>>>>>> find
>>>>>>>>> p.u values for R and X.
>>>>>>>>>
>>>>>>>>> I hope it helps
>>>>>>>>> On Jun 27, 2016 8:53 AM, "anshu dahiya" <dahiyaansh...@gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>> sir my system is not converging while performing opf and dcopf ,
>>>>>>>>> what should i check in my program. Plz help me
>>>>>>>>>
>>>>>>>>> On Sun, Jun 26, 2016 at 5:53 AM, anshu dahiya <
>>>>>>>>> dahiyaansh...@gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>> the problem is still as it was. my 84 bus system is still not
>>>>>>>>>> converging after applying all steps directed by the Dr. Ray
>>>>>>>>>> Zimmerman . can
>>>>>>>>>> anyone help me to make the system converge. i am attaching my file
>>>>>>>>>>
>>>>>>>>>> On Fri, Jun 24, 2016 at 6:24 PM, Ray Zimmerman <r...@cornell.edu>
>>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>>> See FAQ #5
>>>>>>>>>>> <http://www.pserc.cornell.edu/matpower/#pfconvergence>.
>>>>>>>>>>>
>>>>>>>>>>> Ray
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Jun 24, 2016, at 3:42 AM, anshu dahiya <
>>>>>>>>>>> dahiyaansh...@gmail.com> wrote:
>>>>>>>>>>>
>>>>>>>>>>> my 84 bus system is not converging into 10 iteration. what
>>>>>>>>>>> should i take steps to make it converge.
>>>>>>>>>>>
>>>>>>>>>>> On Thu, Jun 23, 2016 at 8:43 PM, Ray Zimmerman <r...@cornell.edu
>>>>>>>>>>> > wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Whenever you have a problem with a case file, the first thing
>>>>>>>>>>>> to do is always run case_info()
>>>>>>>>>>>> <http://www.pserc.cornell.edu/matpower/docs/ref/matpower6.0b1/case_info.html>
>>>>>>>>>>>> to
>>>>>>>>>>>> check for errors in the connectivity information …
>>>>>>>>>>>>
>>>>>>>>>>>> >> case_info('casem84')
>>>>>>>>>>>> Bad bus numbers: 1
>>>>>>>>>>>> bus(1, BUS_I) = 0
>>>>>>>>>>>>
>>>>>>>>>>>> Turns out that bus numbers must be positive integers, as stated
>>>>>>>>>>>> in caseformat
>>>>>>>>>>>> <http://www.pserc.cornell.edu/matpower/docs/ref/matpower6.0b1/caseformat.html>
>>>>>>>>>>>> .
>>>>>>>>>>>>
>>>>>>>>>>>> Ray
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> On Jun 23, 2016, at 1:59 AM, anshu dahiya <
>>>>>>>>>>>> dahiyaansh...@gmail.com> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>> sir how to solve the following error in matpower which comes in
>>>>>>>>>>>> the case84 which i have attached
>>>>>>>>>>>> Error using sparse
>>>>>>>>>>>> Index into matrix must be positive.
>>>>>>>>>>>>
>>>>>>>>>>>> Error in ext2int (line 141)
>>>>>>>>>>>> n2i = sparse(mpc.bus(:, BUS_I), ones(nb, 1), 1:nb,
>>>>>>>>>>>> max(mpc.bus(:, BUS_I)), 1);
>>>>>>>>>>>>
>>>>>>>>>>>> Error in runpf (line 111)
>>>>>>>>>>>> mpc = ext2int(mpc);
>>>>>>>>>>>>
>>>>>>>>>>>> On Wed, Jun 22, 2016 at 6:59 PM, Ray Zimmerman <
>>>>>>>>>>>> r...@cornell.edu> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Assuming this is for a power flow problem, you still have to
>>>>>>>>>>>>> decide whether the bus is voltage controlled or not. If so, make
>>>>>>>>>>>>> it a PV
>>>>>>>>>>>>> bus. If not, and the DG simply injects a fixed amount of power
>>>>>>>>>>>>> without
>>>>>>>>>>>>> controlling voltage, then make it a PQ bus.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Ray
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> > On Jun 22, 2016, at 1:27 AM, anshu dahiya <
>>>>>>>>>>>>> dahiyaansh...@gmail.com> wrote:
>>>>>>>>>>>>> >
>>>>>>>>>>>>> > how to nominate DG bus which has load as well as generation
>>>>>>>>>>>>> > the nomenclature in the matpower as below
>>>>>>>>>>>>> > 1= PQ bus
>>>>>>>>>>>>> > 2= PV bus
>>>>>>>>>>>>> > 3= reference bus
>>>>>>>>>>>>> > 4= isolated bus
>>>>>>>>>>>>> > i have attached my file plz take a look of it. suggest me
>>>>>>>>>>>>> solution.
>>>>>>>>>>>>> > <casem84.m>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> <casem84.m>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>
>
