Hi Yongtao, Iman and laurinAs I know that the available m files in Matpwer only for the balance power flow and in its current form, these files cannot be used for distribution system (unbalanced system). The low voltage grid that you are going to solve is a 3 phase with neutral line (4 wires). So, in order to simulate the system correctly, you will need to know the power flow in each phase as well as the neutral since you are dealing with unbalanced low voltage grid. I really did not try to use Matpower or any other softwares for solving power flow for unbalanced system but I will be happy to share you solving such problem. Kind regards, Haidar ________________________________ From: "[email protected]" <[email protected]> To: [email protected] Sent: Thursday, September 27, 2012 7:52 PM Subject: RE: simulation Low Voltage Grids: MW -> kW?
Hello Laurin and Iman, I would suggest again the kind of twinkling for R, X, B as it is extremely easy to mess up. Laurin, To make MatPower more suitable for the low power/voltage system, you might consider to change MBASE in the case to for instance 0.1 (MW) such that the power flow will be closer to unity. For the display of results, you can consider the following: P_KW = results.branch(:,PF)*1000; or format long results.branch(:, PF) Best regards, //Yongtao From:[email protected] [mailto:[email protected]] On Behalf Of Iman Sent: 27. september 2012 11:10 To: MATPOWER discussion forum Subject: Re: simulation Low Voltage Grids: MW -> kW? Dear Laurin, If u want to scale down loads and generations, u also do that for r x b and other elements of network. I asked for a low voltage case but no one has responded yet. Thanks On 27 Sep 2012, at 12:22, Laurin Vierrath <[email protected]> wrote: Hej there, > >I am trying to simulate low voltage grids. I have loads of 14kW for example. >The problem is that after runpf when results appear they are in MW - pretty >high for such small loads. >Is there any possibility of letting matpower display results in kW or to >extend decimal places? > >thanks a lot, >laurin ************************************************************************************** The contents of this e-mail message and any attachments are confidential and are intended solely for the addressee. If you have received this transmission in error, please immediately notify the sender by return e-mail and delete this message and its attachments. Any unauthorized use, copying or dissemination of this transmission is prohibited. Neither the confidentiality nor the integrity of this message can be vouched for following transmission on the Internet. **************************************************************************************
