Re:A question in calculating power flow

[yangyang]

The voltage magnitude of the slack bus and PV buses is controlled by the VG 
column in gen field, namely, column 6 of mpc.gen. Changing column VM in mpc.bus 
does not change them.



Best Regards,
Yang Yang


 




------------------ Original ------------------
From:                                                                           
                                             "MATPOWER discussion forum"        
                                                                            
<220205...@seu.edu.cn&gt;;
Date:&nbsp;Thu, May 20, 2021 03:39 PM
To:&nbsp;"matpower-l"<matpower-l@cornell.edu&gt;;

Subject:&nbsp;A question in calculating power flow




        Dears, 
 
        &nbsp;&nbsp; Recently I have been confused by the voltage magnitude 
setting in a case model. Suppose in a distribution system like 'case33bw.m', 
like the way I did in revising the power demand I was trying to increase the 
voltage magnitude of node 1(Reference node) by implementing 
mpc.bus(1,VM)=1.0025. After running runpf(mpc), the result shows that it does 
not work, the voltage magnitude of node 1 still converge to 1. Since the 
voltage magnitude of a reference node is supposed to be static during power 
flow calculation, I wanna ask you how could I revise the voltage magnitude of a 
reference node in a case file? 
 
        &nbsp;&nbsp; Thank you in advance, early reply is appreciated.
  
 
        
 
 
        Regards, 
 
        Yan