Dear Jubeyer Rahman,
I just check the connectivity and this is the result :
Checking connectivity ... single fully connected network
Elapsed time is 9.566667 seconds.
================================================================================
Full
System
Number of: ----------
buses 64
loads 58
on 58
off -
fixed 58
dispatchable -
on -
off -
generators 3
on 3
off -
shunt elements -
branches 66
on 66
off -
ties (off) -
Load
active (MW)
dispatched 25.4
fixed 25.4
dispatchable -
nominal 25.4
on 25.4
off -
fixed 25.4
dispatchable -
on -
off -
reactive (MVAr)
dispatched 29.1
fixed 29.1
dispatchable -
nominal 29.1
on 29.1
off -
fixed 29.1
dispatchable -
on -
off -
Generation
active (MW)
dispatched -
max capacity -
on -
off -
min capacity -
on -
off -
reactive (MVAr)
dispatched -
max capacity -
on -
off -
min capacity -
on -
off -
Shunt Injections
active (MW) -
reactive (MVAr) -
Branch Losses
active (MW) -
reactive (MVAr) -
DC line
export (MW)
dispatch -
max capacity -
on -
off -
min capacity -
on -
off -
Reference Buses
num of ref buses 3
ref bus numbers 1
2
3
Is there any wrong with this? because I think everything is fully connected.
*Best Regards,*
*Putu Diah Nitya Kirana,*
Assistant and Researcher at Electric Energy Conversion Laboratory B101
Electrical Engineering Department
Faculty of Electrical Technology
Institut Teknologi Sepuluh Nopember
Surabaya, Indonesia
+62 8170 3178 248
On Thu, 11 Apr 2019 at 00:09, Jubeyer Rahman <[email protected]> wrote:
> Hi,
> As per the suggestion of Dr. Zimmerman, check the connectivity of the
> system by using:
>
> case_info('your case')
>
> As Ray said, you have isolation in your system, this kind of system
> usually don't converge if you don't assign different swing generators for
> different islands.
>
> -Jubeyer
>
>
> On Wed, Apr 10, 2019 at 11:37 AM Nitya Kirana <[email protected]>
> wrote:
>
>> Dear all,
>>
>> Hi, sorry for contacting again, I just make the P and Q loads of the bus
>> 10 times bigger because I put the data wrong at first, but it can not run
>> and I don't know why. Can anyone help me? thank you. Here I attach my
>> program again.
>> *Best Regards,*
>>
>> *Putu Diah Nitya Kirana,*
>>
>> Assistant and Researcher at Electric Energy Conversion Laboratory B101
>> Electrical Engineering Department
>> Faculty of Electrical Technology
>> Institut Teknologi Sepuluh Nopember
>> Surabaya, Indonesia
>>
>> +62 8170 3178 248
>>
>>
>>
>> On Tue, 9 Apr 2019 at 17:49, Ilias Sarantakos <[email protected]>
>> wrote:
>>
>>> Hi Nitya,
>>>
>>> I tried your network and it converged; I am using MATPOWER 6.1.
>>>
>>> Kind regards,
>>>
>>> Ilias Sarantakos
>>> PhD Student
>>> Newcastle University
>>> UK
>>>
>>> Στις Τρί, 9 Απρ 2019 στις 9:19 π.μ., ο/η Nitya Kirana <
>>> [email protected]> έγραψε:
>>>
>>>> Dear Fiaz Ahmad,
>>>>
>>>> I actually have run the simulation for IEEE 33 bus, 16 bus, and 69 bus
>>>> using Newton Raphson method and the result is convergen. And also in IEEE
>>>> 33 bus it has the ratio R/X greater than mine, so I just think that the
>>>> problem is not the Newton Raphson method. Anw, thank you for your
>>>> recommendation.
>>>>
>>>>
>>>> *Best Regards, *
>>>>
>>>> *Putu Diah Nitya Kirana,*
>>>>
>>>> Assistant and Researcher at Electric Energy Conversion Laboratory B101
>>>> Electrical Engineering Department
>>>> Faculty of Electrical Technology
>>>> Institut Teknologi Sepuluh Nopember
>>>> Surabaya, Indonesia
>>>>
>>>> +62 8170 3178 248
>>>>
>>>>
>>>>
>>>> On Tue, 9 Apr 2019 at 11:54, Fiaz Ahmad <[email protected]>
>>>> wrote:
>>>>
>>>>> Dear Nitya use forward-backward sweep algorithm for the power flow of
>>>>> this system.
>>>>>
>>>>>
>>>>> Have a nice day
>>>>>
>>>>> Regards,
>>>>> DR. FIAZ AHMAD
>>>>> PhD Mechatronics Engineering (Sabanci University, Istanbul Turkey),
>>>>> Mob: 0092-332-9124525,
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Tue, Apr 9, 2019 at 9:51 AM Nitya Kirana <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> Dear Fiaz Ahmad,
>>>>>>
>>>>>> Okay thank you, so what's your recommendation for this power system
>>>>>> analysis method?
>>>>>> *Best Regards,*
>>>>>>
>>>>>> *Putu Diah Nitya Kirana,*
>>>>>>
>>>>>> Assistant and Researcher at Electric Energy Conversion Laboratory B101
>>>>>> Electrical Engineering Department
>>>>>> Faculty of Electrical Technology
>>>>>> Institut Teknologi Sepuluh Nopember
>>>>>> Surabaya, Indonesia
>>>>>>
>>>>>> +62 8170 3178 248
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Tue, 9 Apr 2019 at 01:04, Fiaz Ahmad <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>>> Normally Newton Raphson method doesn't converge for distribution
>>>>>>> systems due to high r/x ratios
>>>>>>>
>>>>>>> On Mon, Apr 8, 2019, 22:48 Carlos A. Castro <[email protected]>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Dear Nitya
>>>>>>>>
>>>>>>>> I would do two things:
>>>>>>>>
>>>>>>>> 1. I would replace all commas "," by points "." in the data file.
>>>>>>>>
>>>>>>>> 2. I would try to draw the one line diagram of the network based on
>>>>>>>> the data, to check whether the network is all connected, that is, that
>>>>>>>> there are no isolated buses or group of buses,
>>>>>>>>
>>>>>>>> Good luck,
>>>>>>>>
>>>>>>>> Carlos
>>>>>>>>
>>>>>>>>
>>>>>>>> Em seg, 8 de abr de 2019 às 14:42, Nitya Kirana <
>>>>>>>> [email protected]> escreveu:
>>>>>>>>
>>>>>>>>> Dear all,
>>>>>>>>>
>>>>>>>>> I have run the power flow of 64 radial test bus system using
>>>>>>>>> Newton Raphson in Matpower 4.1. It shows the result of power
>>>>>>>>> losses but it doesn't converge, whenever I run the matlab, the result
>>>>>>>>> is
>>>>>>>>> always different, and I don't know what's the problem. Can anyone
>>>>>>>>> help me?
>>>>>>>>> because this is my final project. It shows "Warning: Matrix is
>>>>>>>>> singular to working precision."
>>>>>>>>>
>>>>>>>>> So, here is my data :
>>>>>>>>>
>>>>>>>>> bus data
>>>>>>>>> bus type Pd Qd Gs
>>>>>>>>> Bs area Vm Va baseKV zone Vmax Vmin
>>>>>>>>> 1 3 0 0 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 2 3 0 0 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 3 3 0 0 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 4 1 0,0136 0,016256 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 5 1 0,0204 0,024384 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 6 1 0 0 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 7 1 0,07684 0,091846 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 8 1 0,02856 0,034138 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 9 1 0,03808 0,045517 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 10 1 0,0238 0,028448 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 11 1 0,01768 0,021133 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 12 1 0,017 0,02032 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 13 1 0,022304 0,02666 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 14 1 0,0204 0,002438 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 15 1 0,05848 0,069901 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 16 1 0,26384 0,315366 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 17 1 0,03774 0,04511 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 18 1 0,0204 0,002438 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 19 1 0,05576 0,06665 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 20 1 0,0136 0,016256 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 21 1 0,0306 0,016256 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 22 1 0,0204 0,024384 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 23 1 0,0272 0,032512 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 24 1 0,11764 0,140614 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 25 1 0,0068 0,008128 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 26 1 0,0136 0,016256 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 27 1 0,0238 0,028448 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 28 1 0,112948 0,135006 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 29 1 0,02176 0,02601 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 30 1 0 0 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 31 1 0,01768 0,021133 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 32 1 0,05168 0,061773 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 33 1 0,03468 0,041453 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 34 1 0,02856 0,034138 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 35 1 0,0272 0,032512 0 0 1 1 0 20 1 1 0,9
>>>>>>>>> 36 1 0,01768 0,021133</fon
>>>>>>>>>
>>>>>>>>
