Hi Zeya,
I’ll try to answer some of your questions: 1) Reactive power consumption (Qmin) is typically smaller than Qmax. Sometimes a good approximation is to take Qmin= -1/3 Qmax, but to a better assumptions you have to look at the generator’s capability curve. 2) If you are doing PF analysis you don’t need these parameters. But in my opinion the line’s capacity typically are between 25-1000 MW. This parameter depends on the physical construction of the line and i think you can’t assume it. 3) The best way is to use either pice-wise or quadratical convex functions. If you have a set of points that represent the generator cost under different powers, you can approximate this set to a quadratical function using least squares regression. 4) This data is very important and you should not assume it. if you can obtain the cost functions you should run an OPF to dispatch active power generation and then you will have a base case to perform all your steady state analysis. Best regards, Uriel > El 02/11/2014, a las 14:09, Zeya Aung [11547809d] <[email protected]> > escribió: > > Anyone help with this question please….? Really need some feedback to > continue my work. > > Many thanks guys!!! > > Best > Zeya > > On 24 Oct, 2014, at 12:22 am, Zeya Aung <[email protected]> wrote: > >> Hey guys >> >> I’m missing some data in my real case analysis. Please advise on the best >> approximation methods and assumptions. >> >> 1) Generator (min and max Q limit) - I’ve the power factor and capacity, and >> i suppose the max Q generation can be assumed using the p.f, but how about >> min Q? >> 2) Line transfer capacity - I’ve all the impedance, susceptance, and length, >> should i set 9900 in rateA of manpower format? Is this realistic? >> 3) Generator cost functions - for hydropower, coal power and natural gas >> turbines, how can i best approximate the cost functions? >> 4) I’ve the load profile (i.e. max load per month at transformers) but i do >> not have the generator data supplying this load. What can i do about this >> considering there are no accurate generation cost functions to run a optimal >> power flow and get a steady state solution? >> >> Many thanks. >> >> >> >> Best >> Zeya >> > > > --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > 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. 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. > >
