The Jacobian is dependent only on the network parameters (constant impedance 
elements) and the bus voltages. If you change load and generation, you will 
need to re-solve the power flow to get new voltages in order for them to be 
reflected in the Jacobian.

-- 
Ray Zimmerman
Senior Research Associate
B30 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645





On Jun 12, 2013, at 2:31 AM, Hesamoddin Marzooghi 
<[email protected]> wrote:

> Dear MatPower users,
>  
> I am working with Matpower to extract Jacobian Matrix  using makeJac () 
> function. I changed load and generation values but Jacobian matrix did not 
> change at all. I just wondering if you can guide me about this issue.
>  
> Thanks so much,
> Best,
> Hesam
>  

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