Sir where should we connect SVC at bus or on transmissions lines??
On 6/29/16, anshu dahiya <[email protected]> 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 <[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>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
