You could search the archive of this forum first. Actually, many similar questions have been asked and discussed before.
----- 原始邮件 ----- 发件人：阿炳 <[email protected]> 收件人：matpower-l <[email protected]> 主题：Confused on power flow 日期：2013年01月02日 19点30分 Happy New Year! I got confused when I used matpower4.1 to compute the power flow.The default of system base power,taking case9.m for example, is mpc.baseMVA = 100.Logically the value of the base power dose not affect the calculated result.However, when mpc.baseMVA = 200 ,running 'runpf(case9)',the power flow result is different,such as losses and the branch charging.That confused me a lot. And there is one more problem.No matter how I change the base voltage(baseKV) in the mpc.bus of case9.m,the power flow is the same.As the default of the pu(Vm) is 1, the real voltage varies with the change of base voltage.Therefore the power flow should not be the same. Thank you for sharing your experience.
