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 <[email protected]> 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 <[email protected]>
> 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 <[email protected]>
>> 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" <[email protected]> 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 <[email protected]>
>>> 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 <[email protected]>
>>>> wrote:
>>>>
>>>>> See FAQ #5 <http://www.pserc.cornell.edu/matpower/#pfconvergence>.
>>>>>
>>>>> Ray
>>>>>
>>>>>
>>>>> On Jun 24, 2016, at 3:42 AM, anshu dahiya <[email protected]>
>>>>> 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 <[email protected]>
>>>>> 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 <[email protected]>
>>>>>> 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 <[email protected]>
>>>>>> 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 <[email protected]>
>>>>>>> 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>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>
