In MATPOWER, this configuration has no impact on the bus matrix. You can simply
enter both transmission lines in the branch matrix. That is the branch matrix
will have a duplicate row. Or, if you like, you can represent it as a single
branch with half the impedance and twice the line charging.
Ray
> On Oct 24, 2014, at 7:23 PM, Zeya Aung [11547809d] <[email protected]>
> wrote:
>
> Hi all
>
> Thanks! Someone in the mail list has solved this problem. I’ve another
> question - I wish to know that if 2 transmission lines with the same
> parameters connect two buses, can i take the equivalent impedance to be half
> of a line? How can i represent the double circuit connection in the bus
> matrix? I need to form the bus matrix (which requires equivalent impedance
> between two buses).
>
> please see attached picture.
>
> Best
> Zeya
>
> On 22 Oct, 2014, at 10:14 pm, Ray Zimmerman <[email protected]
> <mailto:[email protected]>> wrote:<Screen_Shot_2014-10-25_at_6.16.59_am.png>
>
>> Zeya,
>>
>> First of all, please continue to address your MATPOWER questions to the
>> MATPOWER mailing list <http://www.pserc.cornell.edu/matpower/#mailinglist>,
>> not to me directly.
>>
>> Are you using the charging susceptance to compute the value, as opposed to
>> the series susceptance?
>>
>> Ray
>>
>>
>>
>>
>>
>>> On Oct 22, 2014, at 12:28 AM, Zeya Aung [11547809d]
>>> <[email protected] <mailto:[email protected]>> wrote:
>>>
>>> Thank you Ray.
>>>
>>> Can you also help me on with the “b” (per unit) value of the line matrix
>>> please? I’ve been getting values way above 1, which has to be wrong. I’ve
>>> the r and x pu value as attached in the picture. Many thanks!
>>>
>>>
>>>
>>>
>>> Best
>>> Zeya
>>>
>>> On 21 Oct, 2014, at 8:44 pm, Ray Zimmerman <[email protected]
>>> <mailto:[email protected]>> wrote:
>>>
>>>> (please continue to address your MATPOWER questions to the MATPOWER
>>>> mailing list <http://www.pserc.cornell.edu/matpower/#mailinglist>)
>>>>
>>>> In the power flow problem, the demand and generation (except at the slack
>>>> bus) are assumed to be given. So, you can solve the power flow without
>>>> generator costs if you SPECIFY the generator outputs, but if you want to
>>>> compute generator outputs, you’ll have to use some other criteria (like
>>>> and OPF minimizing cost) to determine the generation. Otherwise you
>>>> haven’t given enough information.
>>>>
>>>> Ray
>>>>
>>>>
>>>>> On Oct 21, 2014, at 3:47 AM, Zeya Aung [11547809d]
>>>>> <[email protected] <mailto:[email protected]>> wrote:
>>>>>
>>>>> Hi Sir
>>>>>
>>>>> I’ve the generator, load and transmission line parameters ready in mat
>>>>> power format as attached in this email. Is it possible to run the power
>>>>> flow program to get the values for the power generated, demanded, and the
>>>>> voltage + angle at each bus? Can i get the power flow without the
>>>>> generation cost functions?
>>>>>
>>>>> Many thanks
>>>>>
>>>>>
>>>>>
>>>>> Best
>>>>> Zeya
>>>>> <Screen Shot 2014-10-21 at 3.46.58 pm.png><Screen Shot 2014-10-21 at
>>>>> 3.46.43 pm.png><Screen Shot 2014-10-21 at 3.46.50 pm.png>
>>>>>
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> This message (including any attachments) contains confidential information
> intended for a specific individual and purpose. If you are not the intended
> recipient, you should delete this message and notify the sender and The Hong
> Kong Polytechnic University (the University) immediately. Any disclosure,
> copying, or distribution of this message, or the taking of any action based
> on it, is strictly prohibited and may be unlawful.
>
> The University specifically denies any responsibility for the accuracy or
> quality of information obtained through University E-mail Facilities. Any
> views and opinions expressed are only those of the author(s) and do not
> necessarily represent those of the University and the University accepts no
> liability whatsoever for any losses or damages incurred or caused to any
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