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:[cid:F57A8ED2-7B29-457F-8A6C-3C794D0EEE95] 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> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Disclaimer: 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. 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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 party as a result of the use of such information.
